Title of Invention

METHOD FOR PROCESSING POWER CONTROL INFORMATION FOR HIGH SPEED SHARED CONTROL CHANNEL

Abstract There is disclosed a power control information processing method for a communications system, comprising the steps of providing a power offset PO value to a network node that supports high-speed downlink packet access (HSDPA), wherein the PO value is for a high speed shared control channel HS- SCCH, and the providing is performed via a radio access interface protocol. There is also disclosed a power control information processing method for a communications system, comprising the steps of receiving a power offset PO value from a radio network controller that supports high-speed downlink packet access (HSDPA), wherein the PO value is for a high speed shared control channel HS-SCCH, and the receiving is performed via a radio access interface protocol.
Full Text METHOD FOR PROCESSING POWER CONTROL INFORMATION FOR
HIGH SPEED SHARED CONTROL CHANNEL
TECHNICAL FIELD
The present invention relates to a 3GPP universal mobile
telecommunication system (UMTS) system and, more particularly, to
method for transmitting control information of a high speed shared control
channel (HS-SCCH).
BACKGROUND ART
In general, a UMTS system of third generation partnership project
(3GPP) supports a new high speed downlink shared channel (HS-DSCH) in
order to support a high speed packet data service. The HS-DSCH is used in
a system following a Release 5 which specifies a high speed downlink
packet access (HSDPA) among the technical specifications of 3GPP.
Unlike a W-CDMA system of the existing 3GPP Release
99/Release 4, the HS-DSCH uses a short transmission time interval (TTI) (3
slot, 2 ms) and supports diverse modulation code sets (MCS) and hybrid
ARQ (HARQ) techniques in order to support a high data rate.
The HS-DSCH of the HSDPA system, a transport channel, is
mapped onto HS-PDSCH (High Speed Physical Downlink Shared Channel).
The HS-PDSCH has been devised to transmit high speed user data to
different users through each sub-frame.
DISCLOSURE OF THE INVENTION
Therefore, an object of the present invention is to provide a control information
transmitting method of a mobile communication system that is capable of effectively
controlling transmission power of an HS-SCCH.
Another object of the present invention is to provide a control information
transmitting method of a mobile communication system that is capable of effectively
transmitting a power offset (PO) value of an HS-SCCH.
StiJI another object of the present invention is. to provide fresh
control message and frame structure for transmfttfng a power offset value of
an HS-SCCH to a base station.
Yet another object of the present invention Is to provide a control
message and a frame structure that are capable of selectively transmitting a
PO value of an HS-SCCH according to a radio Jink environment or change
in circumstances.
Another object of the present Invention is to provide a control
information transmitting method of a mobile communication system in which
an SRNC determines, a power offset (PO) value relative to a DPCCH and
transmits ft to a base station.
To achieve at least the above objects in whole or in parts, there is provided a
power control information processing method for a communications system, said
method comprising the steps of: providing a power offset PO value to a network
node that supports high-speed downlink packet access, wherein the PO value is for
a high speed shared control channel HS-SCCH, and the providing is performed via a
radio access interface protocol.
In the control information transmitting method of a mobile
communication system of the present invention, preferably, the RNC is a
serving RNC (SRNC) managing a dedicated radio resource allocated to
each UE.
In the control information transmitting method of a mobile
communication system of the present invention, preferably, the radio access
interface protocol is a control plane or a user plane, and the transmission
power of HS-SCCH Is determined by a power offset value for each field
power of a dedicated physical control channel (DPCCH).
In the control information transmitting method of a mobile
communication system of the present Invention, preferably, If the radio v
access interface protocol is the control plane protocol, the power offset (PO)
value is transmitted as a message type, while if the radio access interface
protocol is a user plane protocol, the power offset value is transmitted as a
control frame type.
In the control information transmitting method of a mobile
communication system of the present invention, preferably, the message is
a radio network subsystem application part (RNSAP) message used
between the SRNC and drift RNCs and a Node B application part (NBAP)
used between the SRNC and a base station.
In the control Information transmitting method of a mobile
communication system of the present invention, preferably, the control
frame includes a PO field for transmitting one PO value.
In the control Information transmitting method of a mobile
communication system of the present invention, preferably, the control
frame includes a PO field transmitting a PO value for non-handover or soft
handover.
In the control information transmitting method of a mobile
communication system of. the present invention, preferably, the control
frame includes a first PO field transmitting a PO value for non-handover or
soft handover; and a second PO field transmitting a PO value for HS-SCCH
used in a primary cell.
In the control Information transmitting method of a mobile
communication system of the present invention, preferably, the control
frame includes a. first PO field transmitting a PO value for non-handover or
soft handover; a second PO field transmitting a PO value for HS-SCCH
used in a primary cell; and a third PO field transmitting a PO value used in a
non-primary cell.
To achieve at least these advantages in whole or in parts, there is
further provided a control information transmitting method of a mobile
communication system in which transmission power of a shared control
channel for HS-DSCH (HS-SCCH) transmitted from a base station to a UE
is determined by using a power offset (PO) value relative to a dedicated
physical control channel (DPCCH), wherein the power offset value is
determined in a serving radio network controller (SRNC) and transmitted to
the base station through a radio access interface protocol.
In the control information transmitting method of a mobile
communication system of the- present invention, preferably, if the radio
access Interface protocol is a control plane protocol, the power offset (PO)
value is transmitted as a message or as a control frame type.
In the control information transmitting method of a mobile
communication system of the present invention, preferably, the message Is
a radio network subsystem application part (RNSAP) message used
between the SRNC and drift RNCs; and a Node B application part (NBAP)
used between the SRNC and a base station.
In the control information transmitting method of a mobile
communication system of the present invention, preferably, the control
frame Includes a PO field for transmitting one PO value-
in the control information transmitting method of a mobile
communication system of the present invention, preferably, the control
frame includes a PO field transmitting a PO value for non-handover or soft
handover.
In the control information transmitting method of a mobile
communication system of the present invention, preferably, the control
frame includes a first PO field transmitting a PO value for non-handover or
soft handover; and a second PO field transmitting a PO value for HS-SCCH
used in a primary cell.
In the control information transmitting method of a mobile
communication system of the present invention, preferably, the control
frame includes a first PO field transmitting a PO value for non-handover or
soft handover; a second PO field transmitting a PO value for HS-SCCH
used in a primary cell; and a third PO field transmitting a PO value used in a.
non-primary cell.
To achieve at least these advantages in whole or in parts, there is
further provided a control information transmitting method of a universal
mobile communication system (UMTS) in which transmission power of a
high speed shared control channel (HS-SCCH) transmitted from a base
station to a UE is determined by a power offset (PO) value relative to a
dedicated physical control channel (DPCCH), wherein the power offset
value is determined in a serving radio network controller (SRNC) and
transmitted as a control frame or as a message type to the base station
through a radio access interface protocol.
In the control information transmitting method of a UMTS of the
present invention, preferably, the message ie a radio network subsystem
application part (RNSAP) message used between the SRNC and drift
RNCs; and a Node B application part (NBAP) used between the SRNC and
a base station.
In the control information transmitting method of a UMTS of the
present invention, preferably, the control frame includes a PO field for
transmitting one PO value.
In the control information transmitting method of a UMTS of the
present invention, preferably, the control frame Includes a PO field
transmitting a PO value for non-handover or soft handover.
In the control information transmitting method of a UMTS of the
present invention, preferably, the control frame includes a first PO field
transmitting a PO value for non-handover or soft handover; and a second
PO field transmitting a PO value for HS-SCCH used in a primary cell.
In the control information transmitting method of a UMTS of the
present invention, preferably, the control frame includes a first PO field
transmitting a PO value for non-handover or soft handover; a second PO
field transmitting a PO value for'HS-SCCH used In a primary cell; and a
third PO field transmitting a PO value used in a non-primary cell.
Additional advantages, objects, and features of the invention will be
set forth In part in the description which follows and In part will become
apparent to those having ordinary skill in the art 'upon examination of the
following or may be learned from practice of the invention. The objects and
advantages of the invention may be realized and attained as particularly
pointed out in the appended claims.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The invention will be described in detail with reference to the
following drawings in which like reference numerals refer to like elements
wherein:
Figure 1 illustrates a structure of a sub-frame of a high speed
physical downlink shared channel (HS-PDSCH);
Figure 2 illustrates a frame structure of a physical channel
constructed in a downlink (DL) dedicated physical channel (DPCH);
Figure 3 illustrates a sub-frame structure of a high speed shared
control channel (HS-SCCH);
Figure 4 illustrates one example the a UE simultaneously receives
HS-SCCHs from a base station (Node B);
Figure 5 illustrates a signaling of HS-SCCH and a transmission
timing of HS-SCCH and HS-DSCH to transmit control Information;
Figure 6 illustrates a structure of a UMTS radio access network
(UTRAN);
Figure 7 illustrates a control frame structure used for updating a
radio interface parameter in the UTRAN of Figure 6;
Figure 8 illustrates a control plane protocol of UTRAN;
Figure 9 illustrates a user plane.protocol of UTRAN;
Figure 10 illustrates a format construction of a radio interface
parameter update control frame to control power of HS-SCCH used for HS-
DSCH in accordance with a first embodiment of the present invention;
Figure 11 illustrates a format construction of a fresh control frame to
control power of HS-SCCH used for HS-DSCH in accordance with a second
embodiment of the present invention;
Figure 12 illustrates a format construction of a radio interface
parameter update control frame to control power of HS-SCCH used for HS-
DSCH in accordance with a third embodiment of the present invention;
Figure 13 illustrates a format construction of a fresh control frame to
control power of HS-SCCH used for HS-DSCH in accordance with a fourth
embodiment of the present invention;
Figure 14 illustrates a format construction of a radio interface parameter
update control frame to control power of HS-SCCH used for HS-DSCH in
accordance with a fifth embodiment of the present invention ; and
Figure 15 illustrates a format construction of a fresh control frame to
control power of HS-SCCH used for HS-DSCH in accordance with a sixth
embodiment of the present invention.
MODES FOR CARRYING OUT THE PREFERRED EMBODIMENTS
Figure 1 illustrates the construction of the HS-DSCH.
As shown In Figure 1, the HS-PDSCH is constructed with 2 ms sub-
frame and different users can share It for use through each sub-frame.
In order for a user equipment (UE = terminal) to receive a user data
through the HS-DSCH, a shared control channel for HS-DSCH.(HS-SCCH)
and a dedicated physical channel (DPCH) should be constructed.
Figure 2 illustrates a structure of a frame of a physical channel
constructed In the dedicated, physical channel (DPCH).
The HS-SCCH, a physical channel, Is a type of a downlink common
control channel to support the HS-DSCH. HS-SCCH transmits a UE ID
(Identification) and control information so that the terminal can receive the
HS-DSCH transmitting the high speed user data.
The UE ID and the control Information are transmitted through each
sub-frame (2ms) of the HS-SCCH. The control information transmitted
through the HS-SCCH.is generated by a Node B (a base station) to whfch a
cell transmitting the HS-DSCH belongs. The UE monitors the UE ID
transmitted through the HS-SCCH to recognize whether there is a data to
be received by Itself and then receives a user data transmitted through HS-
DSCH by using control information transmitted through HS-SCCH.
Figure 3 Is a structure of a sub-frame of HS-SCCH.
As shown in Figure 3, HS-SCCH is constructed with a 2ms sub-
frame and different users can share it for use through each sub-frame. The
control Information that HS-SCCH transmits is roughly divided into transport
format and resource related information (TFRI) and HARQ related
information. The TFRI includes information related to a HS-DSCH transport
channel set size, modulation, a coding rate and the number of multicodes,
and the HARQ related Information Includes information such as a block
number, a redundancy version. Besides, UE ID Information representing
user information is transmitted.
Each UE has an associated downlink DPCH, and as shown in
Figure 4, the terminal can receive maximum 4 HS-SCCHs.
Figure 5 Is a drawing illustrating a transmission timing of the HS-
SCCH and the HS-DSCH.
As shown in Figure 3, after the UE ID and the control information
are transmitted through the HS-SCCH, a data Is transmitted through the
HS-DSCH. The UE reads the control information transmitted through HS-
SCCH and restores an HS-DSCH data. At this time, by enlarging an
overlapping interval of the two channels as much as possible, a
transmission delay can be reduced.
As mentioned above, in the case that a high speed user data is
provided to different users through the HS-DSCH proposed in the HSDPA
technique, at least one or more HS-SCCHs are configured in one cell.
Especially, If there are many HSDPA terminals, configuration of plural HS-
SCCHs In one cell ensures providing of an effective data service.
Figure 6 Illustrates a structure of a conventional UMTS radio access
network (UTRAN).
With reference to Figure 6, UTRAN 112 has a structure that a
serving RNC (SRNC) 114 and a drift RNC (DRNC) control base stations
(Node B), respectively, and In occurrence of soft handover, the UE (=
mobile station) maintains a traffic channel with the base stations 118 and
120 locating in the SRNC 114 and the DRNC 116.
A plurality of base stations (Node B) are placed under the SRNC
114 and the DRNC 116, and in occurrence of soft handover, the UE 122 can
be simultaneously connected with each base station belonging to the SRNC
114 and the DRNC 116. The base station (Node B), SRNC 114 and DRNC
116 are connected through an lub interface, and SRNC 114 and DRNC 116
are connected through an lur Interface. An interface between SRNC 114
and core network (CN) 110 Is called 'lu'.
In general, the radio network controller (RNC) Includes a control
RNC (CRNC) (not shown) managing a common radio resource and a
serving RNC (SRNC) 114 managing a dedicated radio resource allocated to
each UE 122. The DRNC 116, existing In a drift radio network subsystem
(DRNS), is a control station of a destination which provides a radio resource
to the UE 122 if the UE 122 goes beyond the SRNC 114 and moves into its
area.
In the UMTS system, transmission power of a common channel Is
determined by the CRNC which manages a common radio resource. The
power of the common channel determined by the CRNC is included in the
data frame and transmitted to the base station (Node B) and the base
station sets transmission power of the common channel on the basis of the
transmission power value Included In the data frame. Meanwhile,
transmission power of a dedicated channel is determined by an SRNC
which manages a dedicated radio resource. The power of dedicated
channel as determined in the SRNC Is included In a control frame and
transmitted to the base station (Node B), and the base station sets
transmission power of the dedicated channel on the basis of the
transmission power value Included In the control frame.
Figure 7 illustrates a structure of a control frame used for updating a
radio interface parameter In the UTRAN.
With reference to Figure 7, the control frame consists of 2 byte flag
field indicating whether there is a parameter, 1 byte connection frame
number (CFN), 5 bit transmit power control (TPC) power offset (PO) and 1
bit downlink power control (DPC) mode Information field and is constructed
with more than 4 byte payload overall.
As stated above,. in the current system, power of the common
channel is controlled by the CRNC. HS-SCCH, a kind of the common
channel, transmits information of different terminals through each sub-frame.
Like the current system, if the CRNC manages power of HS-SCCH, the
common channel, it is not possible for the CRNC to control power of HS-
SCCH suitably to radio channel of each terminal. The reason is because the
CRNC can not be aware of the radio channel condition of each terminal.
Therefore, the current system can not effectively control power of HS-SCCH.
The above references are Incorporated by reference herein where
appropriate for appropriate teachings of additional or alternative details,
• features and/or technical background.
In general, HS-SCCH Is divided into a plurality of sub-frames
(Tframe=2ms), and each sub-frame transmits control information dedicated to
a specific UE.
Using such characteristics, in the present invention, unlike a general
common control channel, each sub-frame of HS-SCCH is transmitted with
required power for each UE(UE#1-UE#4).
For this purpose, in the present invention, the power control of HS-
SCCH is performed by using the power control of DPCH for each UE. That
Is, the transmission power of HS-SCCH Is controlled by using a power offset
(PO) value relative to the transmission power of a downlink (DL) DPCH.
More specifically, a PO value for transmission power of a pilot field of a
DPCCH is used.
In general; a radio access interface protocol Is divided into a control
plane for transmitting a control signal and a user plane for transmitting data
information. The user plane is a region to which user traffic information is
transmitted such as transmission of a voice or an IP packet, and the control
plane is a region to which control information for managing a network
interface or call is transmitted.
Figure 8 illustrates a control plane protocol of a UTRAN, and Figure
9 illustrates a user plane protocol of the UTRAN.
With reference to Figure 8, the control plane protocol includes a
radio resource control (RRC) protocol used between a mobile station (=UE)
and an RNC, a Node B application part (NBAP) protocol used between a
base station (Node B) and the RNC, a radio network subsystem application
part (RNSAP) protocol used between RNCa, and a radio access network
application part (RANAP) protocol used between the RNC and core network
(CN).
The control plane protocol exists under a client-server principle
environment, and in the lu interface, a UMTS radio access network 112 and
the core network 110 serves as a server and a client, respectively. Likewise,
in the lub interface, the base station serves as a server and the RNC serves
as a client. In the lur interface, the DRNC serves as a server and the SRNC
serves as a client which requests a control service for remote base stationa.
The NBAP, RNSAP and RANAP protocols may contain various
control message for a radio access bearer between the base station and
RNC, between RNCs and between the core network and RNC. At this time,
when the control message is transmitted to the user plane, it is transmitted
as a control frame type, while if the control message is transmitted to the
control plane, it is transmitted as an NBAP or RNSAP message.
In the present invention, when the base station receives a transmit
power control (TPC) command from the mobile station (= UE), it sets
transmission power of the DL DPCH on the basis of the received power
control command and determines transmission power of HS-SCCH
transmitted to a mobile station by using a power offset (PO) value relative to
the transmission power of the DL DPCH.
At this time, the power offset (PO) value for the power control of HS-
SCCH is determined by the radio network controller (RNC), and more
specifically, by the SRNC, and transmitted to the base station. In the
conventional system, the transmission power of the common channel is
determined by the CRNC. However, since the specific sub-frame of HS-
SCCH needs only receive a specific UE, the PO value of HS-SCCH is
determined by the SRNC and transmitted to the base station, and the base
station determines transmission power of HS-SCCH.
in case of the user plane, the PO value determined by the SRNC is
transmitted as a control frame type, while in case of the control plane, the
PO value is transmitted as an NBAP or RNSAP message type.
That is, as shown in Figures 8 and 9, the SRNC determines the PO
value for HS-SCCH and transmits a control frame or a message (RNSAP)
containing the HS-SCCH PO value to the DRNC through the lur interface.
Then, the DRNS transmits the control frame or the message (NBAP) to the
base station (BS) through the lub interface. Thus, the base station adjusts
the transmission power of HS-SCCH by using the HS-SCCH PO value
contained in the received control message or the message (NBAP or
RNSAP).
Figure 10 illustrates a control frame structure for transmitting a PO
value of HS-SCCH through the user plane in accordance with a first
embodiment of the present invention.
As shown in.Figure 10, a control frame in accordance with a first
embodiment of the present invention additionally includes a field (HS-SCCH
PO) for transmitting the HS-SCCH PO value to the conventional control
frame as illustrated in Figure 7.
At this time, the control frame includes a HS-SCCH PO field which
is at least more than 7 bit of 1 byte. The HS-SCCH PO field is variable, and
if the HS-SCCH PO field is 7 bit, it is constructed as a format containing 1
spare bit so that the overall payload can be above 5 byte.
Figure 11 illustrates a control frame structure in accordance with a
second embodiment of the present invention, a different type of the frame
structure of the first embodiment.
As shown in Figure 11, the control frame In accordance with the
second embodiment consists of 1 byte CFN field, at least more than 7 bit
HS-SCCH PO field and a spare extension field. The length of the HS-SCCH
PO field is variable and the overall payload does not exceed 2 byte.
The control frame in accordance with the first and second
embodiments of the present invention serves to transmit a PO value-
determined in the SRNC to the base station in non-handover state or soft
handover state.
Therefore, the base station can effectively control the transmission
power of the HS-SCCH on the basis of the PO value of the SCCH
transmitted through the HS-SCCH PO field of the control frame in non-
handover or even if a radio link condition changes such as soft handover.
Generally, in the 3GPP WCDMA, In order to minimize interference
occurrence possibly caused due to DPCH transmitted from a plurality of
cells in soft handover, a site selection diversity transmit (SSDT) technique is
used.
In the SSDT technique, the UE selects a cell with a highest received
signal power code (RSCP) value of common pilot channel (CPICH) among
active cells, and designates the remaining active cells as non-primary cells
and transmits an ID of primary cell to the active cells.
Thereafter, the primary cell transmits the DPCH data while the non-
primary cells temporarily stops transmission of the DPCH data. The UE
periodically measures the RSCP of CPICH and periodically transmits SSDT
ID of the primary cell to every active cell. At this time, the UE transmits the
primary cell ID through a feedback information (FBI) field of DPCCH.
Accordingly, in the present invention, by utilizing the SSDT method,
even whether a base station cell transmitting HS-SCCH is primary or non-
primary, as well as whether the DPCCH is in soft handover, is considered.
This method uses only an uplink signaling through the FBI field used in the
SSDT, irrespective of whether DPCH is operated by the SSDT method.
For this purpose, the SRNC should selectively transmit a power
offset value (PO) for the case of soft handover, a power offset value
(PO_primary) for the case of primary cell and a power offset value
(PO_nonprimary) for the case of non-primary cell through the lur and lub.
Figure 12 illustrates a control frame structure in accordance with a
third embodiment of the present Invention.
As shown in Figure 12, a control frame in accordance with the third
embodiment of the present invention includes a field for transmitting a
power offset value (PO_primary) for a primary cell (HS-SCCH PO_primary)
in addition to the first embodiment of the present invention as illustrated in
Figure 10. The HS-SCCH PO_primary field is more than 7bit but can be
variable, and the overall payload is more than 5 byte.
In other words, the control frame in accordance with the third
embodiment of the present invention serves to transmit a PO value for soft
handover and a PO_primary value for a primary cell to the base station.
Then, the base station selects one of the two power offset values according
to whether the DPCCH is in soft handover and according to whether it is a
primary cell in case of the soft handover by using the SSDT cell ID that the
UE transmits thereto, and determines transmission power of HS-SCCH.
Figure 13 illustrates a format construction of a fresh control frame to
control power of HS-SCCH used for HS-DSCH in accordance with a fourth
embodiment of the present invention.
As shown in Figure 13, a control frame in accordance with the
fourth embodiment of the present invention consists of 1byte CFN field, at
least more than 7 bit HS-SCCH PO field, an HS-SCCH PO_primary field
and a spare extension field, of which the CFN field can be excluded. The
length of the HS-SCCH PO field and the HS-SCCH PO_primary field is
variable and the overall payload is more than 3 byte.
As stated above, the control frame In accordance with the third and
fourth embodiments of the present invention serves to transmit the PO
value for soft handover and the PO_primary value for a primary cell to the
base station. Accordingly, the base station selects one of the two power
offset values transmitted through the control frame of Figures 12 and 13
according to whether the DPCCH is in soft handover and according to
whether the base station cell is primary in case that the DPCCH is in soft
handover by using the SSDT cell ID that the UE transmits thereto, and
determines transmission power of HS-SCCH.
Figure 14 illustrates a format construction of a radio interface
parameter update control frame to control power of HS-SCCH used for HS-
DSCH in accordance with a fifth embodiment of the present Invention.
As shown in Figure 14, a control frame in accordance with the fifth
embodiment of the present invention includes a field for transmitting a
power offset value (PO_nonprimary) (HS-SCCH PO-nonprimary) for the
case of a non-primary cell, in addition to the third embodiment as illustrated
in Figure 12. The HS-SCCH PO-nonparimary field is more than 7 bit but can
be variable, and the overall payload is 7 byte.
Figure 15 illustrates a format construction of a fresh control frame to
control power of HS-SCCH used for HS-DSCH in accordance with a sixth
embodiment of the present invention.
The control frame in accordance with the sixth embodiment includes
a 1byte CFN field, at least more than 7 bit HS-SCCH PO field, an HS-SCCH
PO_primary field, HS-SCCH PO_nonprimary field and a spare extension
field. The CFN field can be excluded. The length of the HS-SCCH PO field,
the HS-SCCH PO_primary field and the HS-SCCH PO_nonprimary field is
variable and the overall payload does not exceed 3 byte.
That is, the control frame in accordance with fifth and sixth
embodiments serves the PO value for soft handover, the PO_primary value
for a primary cell and PO_onprimary value for a nonprimary cell to the
base station. Accordingly, the base station selects one of the three power
offset values transmitted through the control frame of Figures 14 and 15
according to whether the DPCCH is in soft handover ana according to
whether it is a primary cell in case of the soft handover by using the SSDT
cell ID that the UE transmits thereto, and determines transmission power of
HS-SCCH.
The control frame structure for transmitting the HS-SCCH PO value
in the user plane has been described.
In the present invention, the power control of the HS-SCCH can be
performed by adding a power offset parameter for HS-SCCH to the NBAP
message or the RNSAP message used in the control plane. That is, when a
radio link environment or circumstances are changed such as soft handover
of an associated DPCCH, as shown in Figure 8, the HS-SCCH PO value
determined in the SRNC is inserted into the NBAP message or RNSAP
message and transmitted to the base station, thereby performing the power
control of the HS-SCCH in the control plane.
In the above embodiments, the control message or the control
frame are used between the base station and the RNC or between RNCs,
and the HS-DSCH control information is transmitted to the user plane
through the control frame or transmitted as an NBAP or RNSAP message
type to the control plane.
The control frame and the control message are used to control
power of the shared control channel in case that the HS-DSCH associated
dedicated physical control channel (DPCCH) is in soft handover or in case
that a radio link condition changes.
As so far described, the present invention proposes fresh control
frame and message transmitted between the base station and RNC and
RNCs, through which the power offset value for power control on the shared
control channel (HS-SCCH) is transmitted from the RNC to the base station.
Accordingly, the power control of the HS-SCCH for the HS-DSCH can be
effectively performed in the 3GPP asynchronous system and the UE.
In addition, by using the control frame and message, a power offset
(PO) value can be suitably determined according as a radio link is set,
according to movement of the UE, according to change in the number of
radio links or according to according to a cell status (primary cell or
nonprimary cell) in the base station which transmits a shared control
channel, and then the information is transmitted to the base station,
whereby the performance of HS-DSCH can be improved.
In other words, in the present invention, the first PO field for
transmitting a PO value for non-handover or soft handover of the DPCCH,
the second PO field for transmitting a PO value used for the primary cell
and the third PO field for transmitting a PO value used for the non-primary
cell are selectively implemented in the control frame, so that the
transmission power of HS-SCCH can be suitably controlled according to
change in the radio link condition.
The foregoing embodiments and advantages are merely exemplary
and are not to be construed as limiting the present invention. The present
teaching can be readily applied to other types of apparatuses. The
description of the present invention is intended to be illustrative, and not to
limit the scope of the claims. Many alternatives, modifications, and
variations will be apparent to those skilled In the art. In the claims, means-
plus-function clauses are intended to cover the structure described herein
as performing the recited function and not only structural equivalents but
also equivalent structures.
We claim:
1. A control information transmitting method for use in a mobile communication system
comprising,
transmitting, from a serving radio network controller, hereinafter called SRNC, a power offset
value, hereinafter called PO value, to a drift radio network controller, hereinafter called DRNC, that
supports highspeed downlink packet access, hereinafter called HSDPA, via a radio interface protocol,
characterized in that,
a transmission power of a high speed shared control channel, hereinafter called HS-SCCH, is
determined by the PO value relative to a dedicated physical control channel, hereinafter called
DPCCH.
2. The method as claimed in claim 1, wherein the PO value is provided in a message in the event
of the radio access interface protocol being a control plane protocol.
3. The method as claimed in claim 2, wherein the message is a radio network subsystem
application part message, hereinafter called RNSAP, used between the SRNC and the DRNC.
4. The method as claimed in claim 1, wherein the PO value is provided in a control frame in the
event of the radio access interface protocol being a user plane protocol.
5. The method as claimed in claim 4, wherein the control frame comprises:
a radio interface parameter update flag field indicating existence or non-existence of a
parameter: and
a power offset field, hereinafter called PO field, used for transmitting a PO value for power
control of the HS-SCCH.
6. The method as claimed in claim 5, wherein the control frame comprises:
a connection frame number field, hereinafter called CNF field.
7. The method as claimed in claim 5, wherein the PO field is used to transmit a PO value for
non-handover or soft handover of the DPCCH.
8. The method as claimed in claim 4, wherein the control frame comprises:
a CFN field which is selectively included; and
a PO field used for transmitting a PO value for non-handover or soft handover of a DPCCH.
9. The method as claimed in claim 4, wherein the control frame comprises:
a radio interface parameter update flag field indicating existence or non-existence of a
parameter;
a CFN field;
a transmit power control power offset field, hereinafter called TPC-PO field;
a downlink power control, hereinafter called DPC, mode information field;
a first PO field used for transmitting a PO value for soft handover of the DPCCH; and
a second PO field used for transmitting a PO value for the HS-SCCH used for a primary cell.
10. The method as claimed in claim 4, wherein the control frame comprises:
a CFN field which is selectively included;
a first PO field used for transmitting a PO value for soft handover of the DPCCH; and
a second PO field used for transmitting a PO value for the HS-SCCH used for a primary cell.
11. The method as claimed in claim 4, wherein the control frame comprises:
a radio interface parameter updates a flag field indicating existence or non-existence of a
parameter;
a CFN field;
a TPC-PO field;
a DPC-mode information field;
a first PO field used for transmitting a PO value for soft handover of the DPCCH;
a second PO field used for transmitting a PO value for the HS-SCCH used for a primary cell;
and
a third PO field used for transmitting a PO value of the HS-SCCH used for a non-primary cell.
12. The method as claimed in claim 4, wherein the control frame comprises:
a CFN field which is selectively included;
a first PO field for transmitting a PO value for soft handover of the DPCCH; a second PO
field for transmitting a PO value for the HS-SCCH used for a primary cell; and
a third PO field for transmitting a PO value of the HS-SCCH used for a non-primary cell.
13. The method as claimed in claim 1, wherein the HS-SCCH has a 2ms frame.
14. The method as claimed in claim 1, wherein the radio access interface protocol is an lur
interface protocol.

Documents:

799-kolnp-2004-abstract.pdf

799-kolnp-2004-assignment.pdf

799-kolnp-2004-assignment1.1.pdf

799-kolnp-2004-claims.pdf

799-KOLNP-2004-CORRESPONDENCE 1.2.pdf

799-KOLNP-2004-CORRESPONDENCE.1.1.pdf

799-kolnp-2004-correspondence.pdf

799-kolnp-2004-correspondence1.1.pdf

799-kolnp-2004-description (complete).pdf

799-kolnp-2004-drawings.pdf

799-kolnp-2004-examination report.pdf

799-kolnp-2004-examination report1.1.pdf

799-kolnp-2004-form 1.1.pdf

799-kolnp-2004-form 1.pdf

799-kolnp-2004-form 13.1.pdf

799-kolnp-2004-form 13.pdf

799-kolnp-2004-form 18.1.pdf

799-kolnp-2004-form 18.pdf

799-kolnp-2004-form 2.pdf

799-kolnp-2004-form 3.1.pdf

799-kolnp-2004-form 3.2.pdf

799-kolnp-2004-form 3.pdf

799-kolnp-2004-form 5.1.pdf

799-kolnp-2004-form 5.pdf

799-KOLNP-2004-FORM-27-1.1.pdf

799-KOLNP-2004-FORM-27.pdf

799-kolnp-2004-gpa.pdf

799-kolnp-2004-gpa1.1.pdf

799-kolnp-2004-granted-abstract.pdf

799-kolnp-2004-granted-claims.pdf

799-kolnp-2004-granted-description (complete).pdf

799-kolnp-2004-granted-drawings.pdf

799-kolnp-2004-granted-form 1.pdf

799-kolnp-2004-granted-specification.pdf

799-KOLNP-2004-OTHERS 1.1.pdf

799-kolnp-2004-others.pdf

799-kolnp-2004-reply to examination report.pdf

799-kolnp-2004-reply to examination report1.1.pdf

799-kolnp-2004-specification.pdf


Patent Number 247884
Indian Patent Application Number 799/KOLNP/2004
PG Journal Number 22/2011
Publication Date 03-Jun-2011
Grant Date 30-May-2011
Date of Filing 11-Jun-2004
Name of Patentee LG ELECTRONICS INC.
Applicant Address 20 YOIDO-DONG, YONGDUNGPO-KU, 150-010 SEOUL
Inventors:
# Inventor's Name Inventor's Address
1 LEE YOUNG-DAE SINAN-APT., 419-1501 CHANGWOO-DONG, KYUNGKI-DO, 465-711 HANAM
2 PARK JIN-YOUNG MUKUNGHWA HWASUNG APT. 124-1802, KEUMJUNG-DONG, KYUNGKI-DO, 435-050 KUNPO
PCT International Classification Number H04B 7/005
PCT International Application Number PCT/KR2002/02100
PCT International Filing date 2002-11-11
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 2001/71202 2001-11-16 Republic of Korea
2 2001/71787 2001-11-19 Republic of Korea