Title of Invention

METHOD FOR RECEIVING POINT-TO-MULTIPOINT SERVICE IN MOBILE TERMINAL OF WIRELESS COMMUNICATION SYSTEM AND METHOD FOR TRANSMITTING POINT-TO-MULTIPOINT SERVICE FROM NETWORK OF WIRLESS COMMUNICATION SYSTEM

Abstract The invention relates to a method for receiving a point-to-multipoint service in a mobile terminal of a wireless communication system, the method comprising receiving notification information from a network during a first period, wherein the notification information is received by a plurality of mobile terminals subscribing to at least one point-to-multipoint service; determining to receive a control channel during a second period for receiving a control information message according to the notification information; and receiving the control information message for the point-to-multipoint service during the second period if the mobile terminal determines to receive the control information message during the second period, wherein the notification information contains release information of a point-to-multipoint radio bearer for a specific point-to-multipoint service or access information for a specific point-to-multipoint service, and wherein the notification information is received via a first SCCPCH (Secondary Common Control Physical Channel) and the control information message is received via a second SCCPCH.
Full Text

Description
Technical Field
[1] The present invention relates to a point-to-multipoint service in a mobile com-
munication system, and more particularly, to transmitting and receiving a notification
of control information for a point-to-multipoint service.
Background Art
[2] A universal mobile telecommunications system (UMTS) is a third-generation
mobile communications system evolving from a global system for mobile commu-
nications system (GSM), which is the European standard. The UMTS is aimed at
providing enhanced mobile communications services based on the GSM core network
and wideband code-division multiple-access technologies.
[3] A related art UMTS network structure 1 is illustrated in Figure 1. As shown, a
mobile terminal, or user equipment (UE) 2 is connected to a core network (CN) 4
through a UMTS terrestrial radio access network (UTRAN) 6. The UTRAN 6
configures, maintains and manages a radio access bearer for communications between
the UE 2 and the core network 4 to meet end-to-end quality of service requirements.
[4] The UTRAN 6 includes a plurality of radio network subsystems (RNS) 8, each of
which comprises one radio network controller (RNC) 10 for a plurality base stations,
or Node Bs 12. The RNC 10 connected to a given base station 12 is the controlling
RNC for allocating and managing the common resources provided for any number of
UEs 2 operating in one cell. One or more cells exist in one Node B. The controlling
RNC 10 controls traffic load, cell congestion, and the acceptance of new radio links.
Each Node B 12 may receive an uplink signal from a UE 2 and may transmit a
downlink signals to the UE 2. Each Node B 12 serves as an access point enabling a UE
2 to connect to the UTRAN 6, while an RNC 10 serves as an access point for
connecting the corresponding Node Bs to the core network 4.
[5] Among the radio network subsystems 8 of the UTRAN 6, the serving RNC 10 is
the RNC managing dedicated radio resources for the provision of services to a specific
UE 2 and is the access point to the core network 4 for data transfer to the specific UE.
All other RNCs 10 connected to the UE 2 are drift RNCs, such that there is only one
serving RNC connecting the UE to the core network 4 via the UTRAN 6. The drift
RNCs 10 facilitate the routing of user data and allocate codes as common resources.
[6] The interface between the UE 2 and the UTRAN 6 is realized through a radio

interface protocol established in accordance with radio access network specifications
describing a physical layer (L1), a data link layer (L2) and a network layer (L3)
described in, for example, 3GPP specifications. These layers are based on the lower
three layers of an open system interconnection (OSI) model mat is a well-known in
communications systems.
[7] A related art architecture of the radio interface protocol is illustrated in Figure 2.
As shown, the radio interface protocol is divided horizontally into a physical layer, a
data link layer, and a network layer, and is divided vertically into a user plane for
carrying data traffic such as voice signals and Internet protocol packet transmissions
and a control plane for carrying control information for the maintenance and
management of the interface.
[8] The physical layer (PHY) provides information transfer service to a higher layer
and is linked via transport channels to a medium access control (MAC) layer. Data
travels between the MAC layer and the physical layer via a transport channel. Also,
data transmission is performed through a physical channel between different physical
layers, namely, between physical layers of a sending side (transmitter) and a receiving
side (receiver).
[9] The MAC layer of the second layer (L2) provides information transfer service to a
higher layer and is linked via a logical channel to a radio link control (RLC) layer. The
RLC layer of the second layer (L2) supports the transmission of reliable data and can
perform segmentation and concatenation functions for RLC service data units (SDU)
received from an upper layer.
[10] A radio resource control (RRC) layer located at the lowest portion of the third layer
(L3) is only defined in the controlplane and controls transport channels and physical
channels with respect to the establishment, re-establishment, and release of radio
bearers. A radio bearer (RB) is a service provided by a lower layer, such as the RLC
layer or the MAC layer, for transferring data between the UE 2 and the UTRAN 6.
[11] The establishment of an RB determines regulating characteristics of the protocol
layer and channel needed to provide a specific service, thereby establishing the
parameters and operational methods of the service. When a connection is established to
allow transmission between an RRC layer of a specific UE 2 and an RRC layer of the
UTRAN 6, the UE 2 is said to be in the RRC-connected state. Without such
connection, the UE 2 is in an idle state.
[12] Hereafter, a Multimedia Broadcast/Multicast Service (MBMS or 'MBMS service')
will be described. MBMS refers to a method of providing streaming or background
services to a plurality of UEs 2 using a downlink-dedicated MBMS radio bearer that
utilizes at least one of point-to-multipoint and point-to-point radio bearer. One MBMS
service includes one or more sessions and MBMS data is transmitted to the plurality of

terminals through the MBMS radio bearer only while the session is ongoing.
[13] As the name implies, an MBMS may be carried out in a broadcast mode or a
multicast mode. The broadcast mode is for transmitting multimedia data to all UEs 2
within a broadcast area, for example the domain where the broadcast is available. The
multicast mode is for transmitting multimedia data to a specific UE 2 group within a
multicast area, for example the domain where the multicast service is available.
[14] The UTRAN 6 provides the MBMS service to the UEs 2 using the RB. RBs used
by the UTRAN 6 can be classified as a point-to-point RB or a point-to-multipoint RB.
The point-to-point RB is a bi-directional RB, including a logical channel DTCH
(Dedicated Traffic Channel), a transport channel DCH (Dedicated Channel) and a
physical channel DPCH (Dedicated Physical Channel) or SCCPCH (Secondary
Common Control Physical Channel).
[15] The point-to-multipoint RB is a uni-directional downlink RB, including a logical
channel MTCH (MBMS Traffic Channel), a transport channel FACH (Forward Access
Channel), and the physical channel SCCPCH, as shown in Figure 3. The logical
channel MTCH is configured for each MBMS service provided to one cell and used to
transmit user plane data of a specific MBMS service to the UEs 2.
[16] The UTRAN 6 providing the MBMS service transmits MBMS-related control in-
formation to the plurality of terminals (UEs 2) through an MCCH (MBMS Control
Channel). Herein, the logical channel MCCH is the point-to-multipoint downlink
channel and is mapped to the FACH, which is mapped to the SCCPCH. The MBMS-
related control information includes a session start for indicating the start of an MBMS
service, a session stop for indicating the end of the MBMS service, an RB type
indicator for indicating whether the MBMS service is provided via a point-to-point RB
or a point-to-multipoint RB, RB information for providing point-to-multipoint RB in-
formation such as the MTCH if the RB is a point-to-multipoint RB, counting in-
formation for measuring the number of terminals desiring to receive the MBMS
service, and re-counting information for re-counting the number of terminals desiring
the MBMS service while the MBMS service is being provided.
[17] Figure 3 illustrates channel mapping for an MBMS of a UE side. The MBMS-
related control information may be included in an independent message and
transmitted, or can be entirely included in one MBMS control message. To transmit
various control information related to the MBMS service, the logical channel MCCH is
used. Channel mapping of the MCCH is similar to that of the MTCH. Namely, the
MCCH is a point-to-multipoint downlink channel and is mapped to the transport
channel FACH, which is mapped to the physical channel SCCPCH. For reference, only
one MTCH is provided for one service, while only one MCCH is provided for one cell.
[18] The terminal (UE) 2 wishing to receive an MBMS service, must first receive

MBMS control information through the MCCH. However, because the terminal 2 can
receive only one SCCPCH for the MBMS, and the MCCH is transmitted through a
different SCCPCH irrelative to the MTCH, the terminal cannot receive the MCCH if
the terminal has already received one or more MBMS services.
[19] Figure 4 illustrates a related art method for transmitting MCCH information. The
MCCH information is periodically transmitted according to a modification period and
a repetition period. Furthermore, the MCCH information is divided into critical in-
formation and non-critical information. The non-critical information may be easily
modified during each modification period and repetition period to be transmitted.
However, the critical information may be modified only during each modification
period to be transmitted. As such, the critical information may be repeatedly
transmitted once per repetition period; however, modified critical information may be
transmitted only at a beginning point of the modification period.
[20] A UE desiring to receive a specific MBMS service using a point-to-multipoint RB
receives the MCCH information including RB information through an MCCH channel.
The UE then establishes the point-to-multipoint RB using the MCCH information.
Once the point-to-multipoint RB is established, the UE continues to receive a physical
channel SCCPCH, to which an MTCH is mapped, to obtain specific MBMS service
data transmitted through the MTCH.
[21] Figure 5 is an example of a transmission of discontinuous MBMS data, scheduling
information and a Secondary Notification Indicator (SNI) through a physical channel
SCCPCH. The UTRAN can discontinuously transmit MBMS data through an MTCH.
At the same time, the UTRAN can periodically transmit scheduling information to the
UE through an SCCPCH to which the MTCH is mapped. Here, the scheduling in-
formation notifies the UE of a transmission interval of the MBMS service transmitted
during one scheduling period. Previously, the UTRAN notified the UE of a
transmission period of the scheduling information, namely, the scheduling period, to
allow the UE to receive the scheduling information. Therefore, once the UE has
obtained the scheduling period from the UTRAN, the UE then receives the scheduling
information according to the obtained scheduling period. The UE also discontinuously
receives the SCCPCH to which the MTCH is mapped by using the received scheduling
information.
[22] Still referring to Figure 5, while the MTCH for a specific MBMS service is es-
tablished, the UTRAN can transmit a secondary notification indicator (SNI) to the UE
through the SCCPCH to which the MTCH is mapped. When MCCH information for a
certain MBMS service is transmitted through the MCCH, the SNI notifies the MCCH
information transmission to the UE receiving a corresponding MTCH. In other words,
when the MCCH information to be transmitted through the MCCH exists, the UTRAN

transmits the SNI to the UE through the SCCPCH to which the MTCH is mapped.
Therefore, the UE first receives the SNI through the SCCPCH and then receives the
MCCH according to an indication of the SNI. The UE then receives the MCCH in-
formation through the MCCH. The SNI can be transmitted or received through the
MTCH or through another logical channel mapped to the SCCPCH together with the
MTCH.
[23] However, in the related art, the UE cannot recognize when the SNI is to be
transmitted. For instance, as shown in Figure 4, when the UE discontinuously receives
the SCCPCH to which the MTCH is mapped according to the scheduling information,
only a transmission interval of the MB MS data is notified by the scheduling in-
formation. As a result, the UE receives the SCCPCH only during an interval that the
MBMS service is transmitted.
[24] Therefore, the UE discontinuously receiving the SCCPCH to which the MTCH is
mapped may not receive the SNI. When the SNI is not received, the corresponding UE
may not receive a notification message, which the UTRAN transmits through the
MCCH.
Disclosure of Invention
Technical Problem
[25] The present invention is directed to transmitting and receiving a notification of
control information for a point-to-multipoint service.
Technical Solution
[26] Additional features and advantages of the invention will be set forth in the de-
scription which follows, and in part will be apparent from the description, or may be
learned by practice of the invention. The objectives and other advantages of the
invention will be realized and attained by the structure particularly pointed out in the
written description and claims hereof as well as the appended drawings.
[27] To achieve these and other advantages and in accordance with the purpose of the
present invention, as embodied and broadly described, the present invention is
embodied in a method for receiving a point-to-multipoint service in a mobile terminal
of a wireless communication system, the method comprising receiving notification in-
formation from a network during a first period, wherein the notification information is
received by a plurality of mobile terminals subscribing to at least one point-
to-multipoint service, determining to receive a control channel during a second period
for receiving a control information message according to the notification information,
and receiving the control information message for the point-to-multipoint service
during the second period if the mobile terminal determines to receive the control in-
formation message during the second period.

[28] Preferably, the notification information is periodically received during a specific
time interval. The first period is a modification period. The second period is a
subsequent modification period.
[29] In one aspect of the present invention, the step of determining to receive the control
channel during the second period for receiving a control information message
according to the notification information comprises determining whether the no-
tification information indicates that a mobile terminal subscribing to the point-
to-multipoint service should receive the control information message during the second
period.
[30] Preferably, the control channel is MCCH. The control information message is
received periodically. The notification information is received on a physical channel
SCCPCH carrying MTCH.
[31] In another aspect of the present invention, the method further comprises receiving
scheduling information from the network for receiving the notification information and
receiving the notification information according to the scheduling information. The
scheduling information is received periodically. A reception point of the notification
information within a scheduling period is not constant. Preferably, the method also
comprises discontinuously receiving the SCCPCH carrying MTCH according to the
scheduling information.
[32] In accordance with another embodiment of the present invention, a method for
transmitting a pointrto-multipoint service from a network of a wireless communication
system comprises transmitting notification information during a first period, wherein
the notification information is provided to a plurality of mobile terminals subscribing
to at least one point-to-multipoint service, the notification information comprising an
indication for the reception of a control channel during a second period for receiving a
control information message in a mobile terminal and transmitting the control in-
formation message for the point-to-multipoint service during the second period.
[33] Preferably, the notification information is periodically transmitted during a specific
time interval. The first period is a modification period. The second period is a
subsequent modification period. The control channel is MCCH. The control in-
formation message is transmitted periodically. The notification information is
transmitted on a physical channel SCCPCH carrying MTCH.
[34] In one aspect of the present invention, the method further comprises transmitting
scheduling information to the mobile terminal for the reception of the notification in-
formation and transmitting the notification information according to the scheduling in-
formation. The scheduling information is transmitted periodically. A transmission
point of the notification information within a scheduling period is not constant.
Preferably, the method also comprises discontinuously transmitting the SCCPCH

carrying MTCH according to the scheduling information.
[35] In accordance with another embodiment of the present invention, a mobile terminal
for receiving a point-to-multipoint service in a wireless communication system
comprises means for receiving notification information from a network during a first
period, wherein the notification information is received by a plurality of mobile
terminals subscribing to at least one point-to-multipoint service, means for determining
to receive a control channel during a second period for receiving a control information
message according to the notification information, and means for receiving the control
information message for the point-to-multipoint service during the second period if the
mobile terminal determines to receive the control information message during the
second period.
[36] Preferably, the notification information is periodically received during a specific
time interval. The first period is a modification period. The second period is a
subsequent modification period.
[37] In one aspect of the present invention, the means for determining to receive the
control channel during the second period for receiving a control information message
according to the notification information comprises means for determining whether the
notification information indicates that a mobile terminal subscribing to the point-
to-multipoint service should receive the control information message during the second
period.
[38] Preferably, the control channel is MCCH.The control information message is
received periodically. The notification information is received on a physical channel
SCCPCH carrying MTCH.
[39] In another aspect of the invention, the mobile terminal further comprises means for
receiving scheduling information from the network for receiving the notification in-
formation and means for receiving the notification information according to the
scheduling information. The scheduling information is received periodically. A
reception point of the notification information within a scheduling period is not
constant. Preferably, the mobile terminal also comprises means for discontinuously
receiving the SCCPCH carrying MTCH according to the scheduling information.
[40] It is to be understood that both the foregoing general description and the following
detailed description of the present invention are exemplary and explanatory and are
intended to provide further explanation of the invention as claimed.
Description of Drawings
[41] The accompanying drawings, which are included to provide a further un-
derstanding of the invention and are incorporated in and constitute a part of this spec-
ification, illustrate embodiments of the invention and together with the description
serve to explain the principles of the invention. Features, elements, and aspects of the

invention that are referenced by the same numerals in different figures represent the
same, equivalent, or similar features, elements, or aspects in accordance with one or
more embodiments.
[42] Figure 1 illustrates a related art network structure of a wireless communication
system.
[43] Figure 2 illustrates a related art radio interface protocol architecture based on a
radio access network specification between the UE and the UTRAN.
[44] Figure 3 illustrates related art channel mapping for an MBMS service for a mobile
terminal.
[45] Figure 4 illustrates a related art transmitting method of MCCH information.
[46] Figure 5 illustrates a related art method of transmitting discontinuous MBMS data,
scheduling information and a secondary notification indicator (SNI) through a physical
channel.
[47] Figure 6 illustrates a method for transmitting a notification indicator in accordance
with one embodiment of the present invention.
[48] Figure 7 illustrates a time correlation between a notification indicator transmission
and an MCCH information transmission in accordance with one embodiment of the
present invention.
[49] Figure 8 illustrates an operation of a mobile terminal according to the time
correlation between the notification indicator transmission and the MCCH information
transmission in accordance with one embodiment of the present invention.
[50] Figure 9 illustrates a method of transmitting a notification indicator together with
scheduling information in accordance with one embodiment of the present invention.
[51] Figure 10 illustrates another method of transmitting the notification indicator
together with the scheduling information in accordance with one embodiment of the
present invention.
[52] Figure 11 illustrates an operation of a mobile terminal when transmitting the no-
tification together with the scheduling information in accordance with one embodiment
of the present invention.
Mode for Invention
[53] The present invention relates to transmitting and receiving a notification of control
information for a point-to-multipoint service.
[54] Reference will now be made in detail to the preferred embodiments of the present
invention, examples of which are illustrated in the accompanying drawings. The
present invention is embodied in a mobile communication system, such as a UMTS
(Universal Mobile Telecommunications system). However, the present invention can
be applied to communication systems, which may be operated according to other spec-
ifications.

[55] In accordance with one embodiment of the present invention, a method is provided
for when MBMS data is discontinuously transmitted, a UE or mobile terminal can
receive a notification indicator, such as a secondary notification indicator, and ef-
ficiently receive a physical channel, such as an SCCPCH, to which a logical channel,
such as an MTCH, is mapped.
[56] For this purpose, network transmits MBMS control information through a first
physical channel and a notification indicator through a second physical channel,
wherein the notification indicator indicates the existence of specific MBMS service
data and MBMS control information. The network transmits the notification indicator
during a designated time interval every certain period. Then, the mobile terminal
receives the MBMS control information through the first physical channel and the
specific MBMS service data and the notification indicator through the second physical
channel. During this procedure, the mobile terminal receives the notification indicator
during a designated time interval every certain period.
[57] Preferably, the network transmits a transmission period of the notification indicator
to the mobile terminal before transmitting the notification indicator. Specifically, the
network transmits a period wherein the notification indicator is transmitted to the
mobile terminal through a logical channel, such as an MCCH or BCCH, before
transmitting the specific MBMS service data.
[58] Preferably, the MBMS control information is transmitted periodically. The no-
tification indicator indicates whether the mobile terminal, subscribed to the specific
MBMS service, should receive the MBMS control information expected to be
transmitted at a subsequent period. That is, the notification indicator indicates whether
the MBMS control information for the specific MBMS service is to be modified at the
subsequent period. Therefore, when the MBMS control information is modified at the
subsequent period, the mobile termirial subscribed to the specific MBMS service
receives the corresponding MBMS control information.
[59] Preferably, the notification indicator is transmitted through a logical channel, such
as an MTCH, or through another logical channel mapped together with the MTCH to a
physical channel, such as an SCCPCH. The other logical channel may be a Secondary
MCCH (S-MCCH), which is a logical channel used for transmitting the notification
indicator.
[60] Figure 6 illustrates a method for transmitting a notification indicator in accordance
with one embodiment of the present invention. As shown in Figure 6, the notification
indicator is transmitted once per a certain period. Here, the certain period is a no-
tification indicator period. The notification indicator notifies whether control in-
formation for one or more MBMS services is to be modified, respectively. Therefore,
the notification indicator includes an MBMS service ID and the modified contents of

the control information. The notification indicator is transmitted through a logical
channel MTCH, or through a logical channel S-MCCH, mapped together with an
MTCH, to a physical channel SCCPCH.
[61] Figure 7 illustrates a time correlation between a notification indicator transmission
and an MCCH information transmission. The MCCH transmits the MCCH information
including MBMS control information based on a modification period and a repetition
period. Notification indicators transmitted during a Modification Period #n inform the
mobile terminal of whether the MCCH information to be transmitted during a
subsequent Modification Period #n+l is to be modified. Here, a physical channel
through which the MCCH is transmitted may be different from a physical channel
through which the MTCH is transmitted.
[62] Still referring to Figure 7, the mobile terminal receiving the SCCPCH mapped to
the MTCH receives the notification indicator transmitted during the Modification
Period #n. If the received notification indicator indicates that the MCCH information
to be transmitted at the subsequent Modification Period #n+l is to be modified, the
mobile terminal receives the MCCH information transmitted during the Modification
Period #n+1.
[63] Figure 8 illustrates a method of a mobile terminal depending on a time correlation
between a notification indicator transmission and an MCCH information transmission.
In the present invention, because the notification indicator is periodically transmitted, a
UE RRC receives information about a notification indicator transmission period from a
UTRAN RRC before receiving the notification indicator. Afterwards, first and second
layers of the UE attempt a reception of the notification indicator once per notification
indicator period according to an indication of the UE RRC.
[64] When establishing an MTCH-mapped SCCPCH, the UE determines whether a
reception-ongoing time interval is a time interval wherein the notification indicator is
transmitted with respect to every transmission time interval (TTI) (step S10). If the
reception-ongoing time interval is the time interval wherein the notification indicator is
transmitted, the UE receives the SCCPCH during the time interval (step S11).
[65] The UE identifies whether a data unit received at the time interval corresponds to
the notification indicator or not (step S12). If it is identified that the received data unit
is the notification indicator, namely, if the notification indicator is obtained, the UE
checks whether the notification indicator indicates an MBMS service to which the UE
has subscribed to (step S13). Preferably, the notification indicator includes one or more
MBMS service IDs and information about whether to modify the MCCH information
for each service. If the notification indicator includes the MBMS service ID to which
the UE has subscribed to and indicates the modification of the MCCH information for
the MBMS service, the UE identifies it as the notification indicator indicating the

MBMS service to which the UE has subscribed.
[66] If it is recognized that the notification indicator indicates the MBMS service to
which the UE has subscribed to, the UE initiates receiving the MCCH from a
beginning point of a subsequent modification period of the MCCH (step S14).
[67] Figure 9 illustrates transmitting a notification indicator together with scheduling in-
formation. The UTRAN can transmit scheduling information to a UE once per
scheduling period. In order to simplify a receiving operation of the UE, the UTRAN
may also transmit the notification indicator once per scheduling period. As shown in
Figure 9, the scheduling period is identical to the notification indicator period.
Therefore, the UE can receive the scheduling information and the notification indicator
according to one of the two periods. Preferably, the UE simply receives the scheduling
information and the notification indicator when the UTRAN transmits the notification
indicator before or after the scheduling information is transmitted. Thus, the UE
initiates a reception of the notification indicator together with the scheduling in-
formation once per scheduling period. As a result, the UE may operate in accordance
with the method of Figure 8..
[68] Figure 10 illustrates another example of transmitting the notification indicator
together with the scheduling information. The scheduling information includes in-
formation about a transmission interval of the notification indicator transmitted within
a corresponding scheduling period. Therefore, the notification indicator is transmitted
according to the scheduling information. Here, a transmission point of the notification
indicator within the scheduling period may not be constant.
[69] Figure 11 illustrates an operation of a UE when transmitting a notification indicator
together with scheduling information. As aforementioned, the notification indicator is
transmitted according to the scheduling information. Therefore, a UE RRC receives the
scheduling information to obtain information about a notification indicator
transmission period. Afterwards, first and second layers of the UE initiate a reception
of the corresponding notification indicator every scheduling period according to an
indication of the UE RRC.
[70] When configuring the SCCPCH to which the MTCH is mapped, the UE determines
whether a reception-ongoing time interval is a time interval in which the scheduling in-
formation is transmitted with respect to every transmission time interval (TTI) (step
S20). If the reception-ongoing time interval is identified as the time interval that the
scheduling information is transmitted, the UE receives the SCCPCH during the time
interval (step S21).
[71] The UE then identifies whether a data unit received during the time interval
corresponds to the scheduling information (step S22). If the received data unit is
recognized as the scheduling information, namely, if the scheduling information is

obtained, the UE discontinuously receives the SCCPCH according to the obtained
scheduling information (step S23).
[72] Additionally, when the UE discontinuously receives the SCCPCH, it checks
whether a data unit received from the SCCPCH corresponds to the notification
indicator (step S24). If the received data unit is the notification indicator, namely, if the
notification indicator is obtained, the UE identifies whether the notification indicator
indicates a modification of MCCH information for an MBMS service to which the UE
has subscribed (step S25). Namely, the notification indicator may include information
about one or more MBMS service IDs and whether to modify the MCCH information
for each service. Therefore, if the notification indicator includes the MBMS service ID
to which the UE has subscribed to and indicates the modification of the MCCH in-
formation for the service, the UE identifies it as the notification indicator indicating the
MBMS service to which the UE has subscribed.
[73] If it is recognized that the notification indicator indicates the MBMS service to
which the UE has subscribed, the UE initiates receiving the MCCH from a beginning
point of a subsequent modification period of the MCCH (step S26).
[74] Additionally, the notification indicator may include various information or
messages for a specific MBMS service. For instance, the notification indicator may
include release information of a point-to-multipoint radio bearer for a specific MBMS
service or access information for the specific MBMS service. Once receiving the no-
tification indicator including such information, the UE operates depending on the in-
formation included in the notification indicator. The UTRAN periodically transmits the
notification indicator within one modification period repeatedly.
[75] If the notification indicator received through the above methods indicates a release
of the point-to-multipoint radio bearer for the specific MBMS service, the UE joined to
the MBMS service releases the point-to-multipoint radio bearer therefrom. Also, if the
notification indicator received through the above methods includes the access in-
formation for the specific MBMS service, the UE joined to the service attempts a
transmission of an RRC connection request message on the uplink according to the
access information.
[76] As described so far, in the present invention, the network periodically transmits a
notification message (notification indicator) for indicating an MCCH reception through
a physical channel transmitting MBMS data. In response, the mobile terminal pe-
riodically checks the transmission of the notification message and determines whether
to receive the MCCH. According to these methods, when the MBMS data is discon-
tinuously transmitted, the UE can easily receive the notification message and also ef-
fectively receive the SCCPCH to which the MTCH is mapped.
[77] Although the present invention is described in the context of mobile com-

munication, the present invention may also be used in any wireless communication
systems using mobile devices, such as PDAs and laptop computers equipped with
wireless communication capabilities. Moreover, the use of certain terms to describe the
present invention should not limit the scope of the present invention to certain type of
wireless communication system, such as UMTS. The present invention is also
applicable to other wireless communication systems using different air interfaces and/
or physical layers, for example, TDMA, CDMA, FDMA, WCDMA, etc.
[78] The preferred embodiments may be implemented as a method, apparatus or article
of manufacture using standard programming and/or engineering techniques to produce
software, firmware, hardware, or any combination thereof. The term 'article of
manufacture' as used herein refers to code or logic implemented in hardware logic
(e.g., an integrated circuit chip, Field Programmable Gate Array (FPGA), Application
Specific Integrated Circuit (ASIC), etc.) or a computer readable medium (e.g.,
magnetic storage medium (e.g., hard disk drives, floppy disks, tape, etc.), optical
storage (CD-ROMs, optical disks, etc.), volatile and non-volatile memory devices
(e.g., EEPROMs, ROMs, PROMs, RAMs, DRAMs, SRAMs, firmware, programmable
logic, etc.).
[7.9] Code in the computer readable medium is accessed and executed by a processor.
The code in which preferred embodiments are implemented may further be accessible
through a transmission media or from a file server over a network. In such cases, the
article of manufacture in which the code is implemented may comprise a transmission
media, such as a network transmission line, wireless transmission media, signals
propagating through space, radio waves, infrared signals, etc. Of course, those skilled
in the art will recognize that many modifications may be made to this configuration
without departing from the scope of the present invention, and that the article of
manufacture may comprise any information bearing medium known in the art.
[80] As the present invention may be embodied in several forms without departing from
the spirit or essential characteristics thereof, it should also be understood that the
above-described embodiments are not limited by any of the details of the foregoing de-
scription, unless otherwise specified, but rather should be construed broadly within its
spirit and scope as defined in the appended claims, and therefore all changes and modi-
fications that fall within the metes and bounds of the claims, or equivalence of such
metes and bounds are therefore intended to be embraced by the appended claims.

We Claim :
1. A method for receiving a point-to-multipoint service in a mobile terminal of a wireless
communication system, the method comprising:
receiving notification information from a network during a first period, wherein the
notification information is received by a plurality of mobile terminals subscribing to at least one
point-to-multipoint service;
determining to receive a control channel during a second period for receiving a control

information message according to the notification information; and
receiving the control information message for the point-to-multipoint service during the
second period if the mobile terminal determines to receive the control information message during
the second period,
wherein the notification information contains release information of a point-to-multipoint
radio bearer for a specific point-to-multipoint service or access information for a specific point-to-
multipoint service, and
wherein the notification information is received via a first SCCPCH (Secondary Common
Control Physical Channel) and the control information message is received via a second SCCPCH.
2. The method as claimed in claim 1, wherein the notification information is periodically
received during a specific time interval.
3. The method as claimed in claim 1, wherein the first period is a modification period and the
second period is a subsequent modification period.
4. The method as claimed in claim 1, wherein the first SCCPCH and the second SCCPCH are
the same SCCPCH.
5. The method as claimed in claim 1, wherein the step of determining to receive the control
channel during the second period for receiving a control information message according to the
notification information comprises determining whether the notification information indicates that a
mobile terminal subscribing to the point-to-multipoint service should receive the control information

message during the second period.
6. The method as claimed in claim 1, wherein the control channel is a MCCH (MBMS Control
Channel).
7. The method as claimed in claim 1, wherein the control information message is received
periodically.
8. The method as claimed in claim 1, wherein the first SCCPCH is a SCCPCH carrying MTCH
(MBMS Traffic Channel).
9. The method as claimed in claim 1, which involves: receiving scheduling information from the
network for receiving the notification information.
10. The method as claimed in claim 9, wherein the scheduling information is received
periodically.
11. The method as claimed in claim 9, wherein a reception point of the notification information
within a scheduling period is not constant.
12. The method as claimed in claim 9, which involves discontinuously receiving the first
SCCPCH according to the scheduling information.
13. A method for transmitting a point-to-multipoint service from a network of a wireless
communication system, the method comprising:
transmitting notification information during a first period, wherein the notification
information is provided to a plurality of mobile terminals subscribing to at least one point-to-
multipoint service, the notification information comprising an indication for the reception of a
control channel during a second period for receiving a control information message in a mobile
terminal; and
transmitting the control information message for the point-to-multipoint service during the

second period,
wherein the notification information contains release information of a point-to-multipoint
radio bearer for a specific point-to-multipoint service or access information for the a specific point-
to-multipoint service, and
wherein the notification information is transmitted via a first SCCPCH and the control
information message is transmitted via a second SCCPCH .
14. The method as claimed in claim 13, wherein the notification information is periodically
transmitted during a specific time interval.
15. The method as claimed in claim 13, wherein the first period is a modification period and the
second period is a subsequent modification period.
16. The method as claimed in claim 13, wherein he first SCCPCH and the second SCCPCH are
the same SCCPCH.
17. The method as claimed in claim 13, wherein the control channel is a MCCH.
18. The method as claimed in claim 13, wherein the control information message is transmitted
periodically.
19. The method as claimed in claim 13, wherein the first SCCPCH is a SCCPCH carrying
MTCH.
20. The method as claimed in claim 13, which involves:
transmitting scheduling information to the mobile terminal for the reception of the
notification information.
21. The method as claimed in claim 20, wherein the scheduling information is transmitted
periodically.

22. The method as claimed in claim 20, wherein a transmission point of the notification
information within a scheduling period is not constant.
23. The method as claimed in claim 20, which involves discontinuously transmitting the first
SCCPCH according to the scheduling information.



ABSTRACT


METHOD FOR RECEIVING POINT-TO-MULTIPOINT SERVICE IN MOBILE
TERMINAL OF WIRELESS COMMUNICATION SYSTEM AND METHOD FOR
TRANSMITTING POINT-TO-MULTIPOINT SERVICE FROM NETWORK OF
WIRELESS COMMUNICATION SYSTEM
The invention relates to a method for receiving a point-to-multipoint service in a mobile terminal of a
wireless communication system, the method comprising receiving notification information from a
network during a first period, wherein the notification information is received by a plurality of
mobile terminals subscribing to at least one point-to-multipoint service; determining to receive a
control channel during a second period for receiving a control information message according to the
notification information; and receiving the control information message for the point-to-multipoint
service during the second period if the mobile terminal determines to receive the control information
message during the second period, wherein the notification information contains release information
of a point-to-multipoint radio bearer for a specific point-to-multipoint service or access information
for a specific point-to-multipoint service, and wherein the notification information is received via a
first SCCPCH (Secondary Common Control Physical Channel) and the control information message
is received via a second SCCPCH.

Documents:

01529-kolnp-2006 correspondence others-1.1.pdf

01529-kolnp-2006 form-3-1.1.pdf

01529-kolnp-2006 priority document.pdf

01529-kolnp-2006-abstract.pdf

01529-kolnp-2006-assignment.pdf

01529-kolnp-2006-claims.pdf

01529-kolnp-2006-correspondence others.pdf

01529-kolnp-2006-correspondence-1.2.pdf

01529-kolnp-2006-description complete.pdf

01529-kolnp-2006-drawings.pdf

01529-kolnp-2006-form 1.pdf

01529-kolnp-2006-form 3.pdf

01529-kolnp-2006-form 5.pdf

01529-kolnp-2006-form-18.pdf

01529-kolnp-2006-gpa.pdf

01529-kolnp-2006-international publication.pdf

01529-kolnp-2006-international search authority report.pdf

01529-kolnp-2006-pct form.pdf

1529-KOLNP-2006-(13-03-2012)-CORRESPONDENCE.pdf

1529-KOLNP-2006-ABSTRACT.pdf

1529-KOLNP-2006-AMANDED CLAIMS.pdf

1529-KOLNP-2006-ASSIGNMENT-1.1.pdf

1529-KOLNP-2006-CANCELLED PAGES.pdf

1529-KOLNP-2006-CORRESPONDENCE-1.1.pdf

1529-KOLNP-2006-CORRESPONDENCE.pdf

1529-KOLNP-2006-DESCRIPTION (COMPLETE).pdf

1529-KOLNP-2006-DRAWINGS.pdf

1529-KOLNP-2006-EXAMINATION REPORT.pdf

1529-KOLNP-2006-FORM 1.pdf

1529-KOLNP-2006-FORM 18.pdf

1529-KOLNP-2006-FORM 2.pdf

1529-KOLNP-2006-FORM 3.pdf

1529-KOLNP-2006-FORM 5.pdf

1529-KOLNP-2006-GPA.pdf

1529-KOLNP-2006-GRANTED-ABSTRACT.pdf

1529-KOLNP-2006-GRANTED-CLAIMS.pdf

1529-KOLNP-2006-GRANTED-DESCRIPTION (COMPLETE).pdf

1529-KOLNP-2006-GRANTED-DRAWINGS.pdf

1529-KOLNP-2006-GRANTED-FORM 1.pdf

1529-KOLNP-2006-GRANTED-FORM 2.pdf

1529-KOLNP-2006-GRANTED-FORM 3.pdf

1529-KOLNP-2006-GRANTED-FORM 5.pdf

1529-KOLNP-2006-GRANTED-SPECIFICATION-COMPLETE.pdf

1529-KOLNP-2006-INTERNATIONAL PUBLICATION.pdf

1529-KOLNP-2006-INTERNATIONAL SEARCH REPORT & OTHERS.pdf

1529-KOLNP-2006-OTHERS-1.1.pdf

1529-KOLNP-2006-OTHERS.pdf

1529-KOLNP-2006-PETETION UNDER RULE 137.pdf

1529-KOLNP-2006-REPLY TO EXAMINATION REPORT.pdf

abstract-01529-kolnp-2006.jpg


Patent Number 256319
Indian Patent Application Number 1529/KOLNP/2006
PG Journal Number 23/2013
Publication Date 07-Jun-2013
Grant Date 31-May-2013
Date of Filing 05-Jun-2006
Name of Patentee LG ELECTRONICS, INC.
Applicant Address 20, YOIDO-DONG, YONGDUNGPO-GU, SEOUL 150-010
Inventors:
# Inventor's Name Inventor's Address
1 LEE, YOUNG-DAE 370-43, DUCKPOONG 2-DONG, HANAM, GYEONGGI-DO, 465-711
2 CHUN, SUNG-DUCK SATBYUL HANYANG APT. 601-1007, DALAN-DONG, DONGAN-GU, ANYANG, GYEONGGI-DO, 431-719
3 YI, SEUNG-JUNE DAESEONG YOUNEED 101-1203, 1641-3, SEOCHO 1-DONG, SEOCHO-GU, SEOUL 137-880
PCT International Classification Number H04B 7/26;H04Q 7/20
PCT International Application Number PCT/KR2005/001324
PCT International Filing date 2005-05-06
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10-2004-0031897 2004-05-06 Republic of Korea