WO2007124661A1

WO2007124661A1 - A power control parameter configuration method for high speed shared information channel by node b

Info

Publication number: WO2007124661A1
Application number: PCT/CN2007/001045
Authority: WO
Inventors: Zijiang Ma; Wei Fang; Zhifeng Ma
Original assignee: Zte Corporation
Priority date: 2006-04-30
Filing date: 2007-03-30
Publication date: 2007-11-08
Also published as: CN100544228C; CN101064539A

Abstract

The invention discloses a power control parameter configuration method for high speed shared information channel (HS-SICH) by Node B. When the high layer of network side configures the “TPC step size” parameter for user equipment (UE), it also uses the high layer signaling of NBAP protocol to send the said parameter to Node B. By Using the way, the high layer of network side configures the “TPC step size” parameter for Node B. Based on the following parameters: the said “TPC step size” parameter, the “Ack-Nack power offset” parameter, the “HS-SICH SIR Target” parameter, the actual power measurement value of HS-SICH (PHS-SICH), the decoded ACK/NACK information loaded in HS-SICH, the Node B generates the transmitted power control (TPC) parameter, which is used for HS-SICH. By computing the anticipated power value of HS-SICH, the Node B modifies the said TPC parameter and decides the said TPC parameter more exactly. The said method can realize the closed-loop power control of HS-SICH better.

Description

Method for configuring spring number of node B idle sharing information channel power control

The present invention relates to the field of mobile communication technologies, and in particular, to a method for configuring a Node B high-speed shared information channel power control parameter in a time division synchronous code division multiple access TD-SCDMA system, including a wireless network controller configuring a high speed shared information channel for a Node B. The power control step size parameter and the method used by the Node B to generate a transmit power control command for the high speed shared information channel. Background technique

HSDPA (High Speed Downlink Packet Access) technology is a technology that provides high speed downlink data services for multiple users. It is suitable for a large number of services such as multimedia and Internet. HSDPA introduces a new transport channel HS-DSCH (High Speed Downlink Shared Channel), where users share downlink code resources and power resources for time division multiplexing. This structure is suitable for bursty packet data services. The downlink physical channel HS-SCCH (High Speed Shared Control Channel) is used to carry physical layer control signaling for decoding on the HS-PDSCH (High Speed Physical Downlink Shared Channel). By reading the information on the HS-SCCH, the UE (user equipment) can find the HS-DSCH resource configured for the UE according to the physical layer information such as the code channel, the time slot, and the modulation mode, and the UE transmits the HS- The SICH (High Speed Shared Information Channel) to Node B (Node B) feeds back channel quality information (CQI) and block decoding information (ACK/ACK) of the HS-DSCH channel.

The chip rate of the TD-SCDMA system is 1.28 Mcps, also known as LCR TDD (low chip rate rate time division duplex mode). According to the 3GPP protocol, the HS-SCCH channel and the HS-SICH channel allocated by the Node B to the UE are For the occurrence of the Node B, the UE may allocate 1 to 4 HS-SCCH physical channels, and correspondingly, the UE is allocated 1 to 4 HS-SICH physical channels. All HS-SCCHs allocated for one UE are referred to as one HS-SCCH set, and correspondingly there is also a corresponding HS-SICH set. The UE may only use one of the set at a TTI (Transmit Time Interval) time. HS-SCCH and a corresponding HS-SICH.

In the TD-SCDMA system, the UE (mobile terminal) transmits the HS-SICH to the Node B, and the corresponding HS-SCCH transmitted by the Node B to the 需要 requires power control. At LCR TDD The power control of HS-SICH includes open loop power control and closed loop power control.

The UE receives and stores the parameters of the high layer configuration in advance, including: PRX _HS - _SICH (HS-SICH expected value), TPC Step Size (transmission power control step size), Ack-Nack Power Offset (transmitted power offset), and the like, and The transmit power of the open-loop control and the closed-loop control of the HS-SICH is calculated according to the received TPC (Transmission Power Control) parameter carried on the HS-SCCH.

The TPC command used by the UE in the HS-SICH closed-loop power control process is generated by the Node B and carried on the HS-SCCH physical channel and sent to the UE. As shown in FIG. 1, the location of the TPC information on the physical layer is displayed, indicating that the TPC command is configured on the physical channel, where the SS symbol is a Synchronization Shift Symbol(s), and the intermediate code (Midamble) It is unique to TDD systems, mainly for channel estimation, TPC symbol indicates Transmit Power Control Symbol(s), and 144 and 864 represent chip rate (Chip(s)), respectively.

The method in which the Node B generates the TPC command compares the HS-SICH target value with the measured HS-SICH power value, and also needs to consider the impact of the ACK/NACK information carried on the HS-SICH on the HS-SICH power measurement value. The TPC command needs to be adjusted based on the comparison between the predicted value of the HS-SICH and the actual measured value.

The ACK/ACK information is carried on the HS-SICH physical channel sent by the UE to the Node B, as shown in the following table. Table 1: ACK/NACK information on HS-SICH

When the UE can correctly receive data from the Node B, the ACK/NACK information carried by the UE on the HS-SICH is ACK (1), and when the UE cannot correctly receive data from the Node B, the UE is in the uplink physics. The ACK/NACK information carried on the channel HS-SICH is NACK ( 0 ).

In the current 3GPP protocol, the DPCH includes UL DPCH (uplink dedicated physical channel) And DL DPCH (Downlink Dedicated Physical Channel), and describes the calculation method of the transmit power of the DPCH (Dedicated Physical Channel), including open loop power control and closed loop power control, and a method in which the Node B generates a TPC command.

However, due to the different characteristics of the high-speed shared channel and the dedicated physical channel, the method in which the Node B generates the TPC command for the closed-loop power control of the HS-SICH channel and the method of the TPC command for the closed-loop power control of the dedicated channel are different. The method in which the Node B generates a TPC command for closed loop power control of the HS-SICH is not described in the current protocol.

Moreover, when the Node B calculates the TPC command for the closed-loop power control of the HS-SICH, it is generally required to use the HS-SICH TPC step size to predict the received power. In the current protocol, the network side The upper layer (the RRC layer of the RC, the radio resource control layer of the radio network controller) sends the high layer signaling to the Node B. The uplink TPC step size information element for the HS-SICH is not configured, and the HS cannot be predicted. - SICH power value.

Summary of the invention

The technical problem to be solved by the present invention is to provide a node in a TD-SCDMA system.

The configuration method of the B-speed shared information channel power control parameter is used to implement the power control step parameter HS-SICH TPC step size configured by the radio network controller for the Node B to configure the high-speed shared information channel, and the Node B uses the parameter to generate the high-speed shared The transmit power control command TPC of the information channel is used to better implement closed loop power control of the HS-SICH.

The present invention provides a method for configuring a high-speed shared information channel "TPC step size" parameter for a node B by a network-side upper layer, including:

When the high-level shared information channel "TPC step size" parameter is configured for the user equipment, the network-side upper layer also sends the parameter to the node B through the high-level signaling of the BAP protocol, and configures the high-speed shared information channel for the node B. "TPC step size "Parameters.

The network side high layer is a radio resource control layer of the radio link controller.

The network side high layer sends the parameter to the Node B by providing an information element including a high speed shared information channel "TPC step size" parameter in the message sent to the Node B during the execution of the NBAP protocol. The NBAP protocol execution process includes: a radio link establishment process, a radio link addition process, a synchronous radio link reconfiguration preparation process, or an asynchronous radio link reconfiguration process.

The message includes: a radio link setup request message, a radio link add request message, a radio link reconfiguration preparation message, or a radio link reconfiguration request message.

The information unit includes "HS-DSCH TDD Information" and "HS-DSCH"

Information To Modify ,, and " HS-DSCH Information To Modify Unsynchronised".

The present invention also provides a method for a Node B to configure a "TPC" parameter for high speed sharing information channel closed loop power control, comprising the following steps:

(1) When the network side high layer configures the "TPC step size" parameter for the user equipment, the parameter is also sent to the node B through the high layer signaling of the BAP protocol, and the "TPC step size" parameter is configured for the node B;

(2) Node B obtains the parameters "Ack-Nack power offset", "HS-SICH SIR Target" and "TPC step size" configured by the upper layer, and obtains the actual power measurement value P _HS _ _{SICH of the} high speed shared information channel by measurement, And decoding ACK/NACK information carried on the high speed shared information channel;

(3) The Node B obtains the transmit power value of the high-speed shared information channel configured by the upper layer of the user equipment according to the parameter "Ack-Nack power offset" of the high-level configuration, the measured PHS-SICH, and the ACK/NACK information obtained by decoding. ;

(4) The Node B compares the parameter "HS-SICH SIR Target" of the high-level configuration with the transmit power value of the current high-speed shared information channel configured by the upper layer of the user equipment, and initially determines the current time according to the comparison result. The value of the "TPC" parameter;

(5) The node Β transmits the power value according to the high-speed shared information channel configured by the upper layer of the user equipment last time, the value of the "TPC" parameter generated by the node Β last time, and the "TPC step" configured by the network-side upper layer as the node Β The size" parameter calculates the predicted power value of the high-speed shared information channel;

(6) The Node B compares the current high-speed shared information channel predicted power value with the transmit power value of the local high-speed shared information channel configured by the user equipment upper layer, and determines the current "TPC" according to the comparison result adjustment. "The value of the parameter. The method further includes the steps of:

(7) Node B carries the current "TPC" parameter on the high speed shared control channel and sends it to the user equipment.

The network side high layer is a radio resource control layer on the network side.

In the step (3):

When the ACK/NACK information is ACK, the transmit power of the high-speed shared information channel configured by the upper layer of the user equipment is the actual power measurement value PHS-SICH of the high-speed shared information channel received by the Node B minus the "Ack-Nack power offset". " parameter value;

When the ACK/NACK information is NACK, the transmit power of the high-speed shared information channel configured by the upper layer of the user equipment is the actual power measurement value PHS-SICH of the high-speed shared information channel received by the Node B.

In the step (4):

If the transmit power value of the high-speed shared information channel configured by the user equipment is higher than the "HS-SICH SIR Target" parameter, set the "TPC" parameter to "down";

If the transmit power value of the high speed shared information channel configured by the high layer of the user equipment is less than or equal to the "HS-SICH SIR Target" parameter, the "TPC" parameter is set to "up".

In the step (5):

When the "TPC" parameter generated by the node B is "down", the current high-speed shared information channel prediction power value = the high-speed shared information channel transmission power value configured by the user equipment upper layer last time minus the network-side high-level The "TPC step size" parameter configured for Node B;

When the "TPC" parameter generated by the node B is "up", the current high-speed shared information channel prediction power value = the high-speed shared information channel transmission power value configured by the user equipment upper layer last time plus the network-side high-level The "TPC step size" parameter configured for Node B.

In the step (6):

When the current high-speed shared information channel predicted power value is consistent with the transmit power value of the local high-speed shared information channel configured by the user equipment upper layer, the "TPC" parameter value determined in step (4) is not modified; When the current high speed shared information channel predicted power value does not match the transmit power value of the local high speed shared information channel configured by the user equipment upper layer, the "TPC" parameter value determined in step (4) is modified.

The step (6) further includes:

When the current high-speed shared information channel predicted power value does not match the transmit power value of the local high-speed shared information channel configured by the upper layer of the user equipment, and the comparison results of the consecutive multiple times before the comparison do not match, the modification is performed in the step. The value of the "TPC" parameter determined in (4). Wherein, in the modifying step, if the initially determined "TPC" parameter is "up", then it is changed to "down"; if the initially determined "TPC" parameter is "down", then It was changed to "up".

In the step (1), the network side high layer sends the parameter to the node B by providing an information element including a "TPC step size" parameter in a message sent to the node B during the execution of the NBAP protocol. .

In the step (1), the NBAP protocol process includes: a radio link establishment process, a wireless link addition process, a synchronous radio link reconfiguration preparation process, or an asynchronous radio link reconfiguration process.

In the step (1), the message includes: a radio link setup request message, a radio link add request message, a radio link reconfiguration preparation message, or a radio link reconfiguration request message.

In the step (1), the information unit includes "HS-DSCH TDD Information", "HS-DSCH Information To Modify", and "HS-DSCH Information To Modify Unsynchronised".

Applying the method of the present invention, the wireless network controller configures the power control step parameter HS-SICH TPC step size of the high speed shared information channel for the Node B, and the Node B uses the parameter to generate and adjust the information channel for high speed sharing. The transmit power control command TPC can better achieve closed loop power control of the HS-SICH.

BRIEF abstract 1 is a schematic diagram showing the location of TPC information configuration on a physical layer in a 1.28 Mcps TDD system;

2 is a flow chart of a Node B generating a TPC command for HS-SICH closed loop power control in an embodiment of the present invention. Preferred embodiment of the invention

The method of the present invention will be described in detail below with reference to specific embodiments and drawings.

The present invention provides a method for a radio network controller (RNC) to configure an HS-SICH TPC step size for a Node B (Node B), including:

When configuring and updating the high-speed shared information channel TPC step size parameter for the UE, the RNC also configures and updates the high-speed shared information channel TPC step size parameter for the Node B to ensure that the parameter value is the same on the UE and the Node B.

In order to maintain the consistency of the HS-SICH TPC step size parameter, the RNC sends the parameter to the UE through the high-level signaling of the RRC protocol on the Uu interface, and correspondingly passes the high-level signaling of the BAP protocol on the Iub interface. This parameter is sent to Node B. The UE uses this parameter to calculate the transmit power of the closed loop power control of the HS-SICH, and the Node B uses this parameter to predict the HS-SICH transmit power of the UE.

The specific method for the RNC to configure and update the TPC step size parameter of the high speed shared information channel for the Node B is:

In some processes of the NBAP protocol, the message sent by the RNC to the Node B includes information units, which also include an information unit for adjusting the power control step size of the HS-SICH closed-loop power control (HS-SICH). The TPC step size ) may be referred to as a "TPC step size" information element, and the RNC adjusts the value of the information unit to adjust the power control step size ( TPC step size ) for the UE closed loop power control;

These processes of the NBAP protocol include: "radio link setup procedure", "radio link addition procedure", and synchronous radio link reconfiguration preparation ("synchronized radio link reconfiguration preparation"Procedure" ) , asynchronous wireless link reconfiguration process ( "unsynchronized radio link Reconfigruarion procedure");

In the above process, the message sent from the RNC to the Node B includes: a radio link setup request message, a radio link addition request message, and a radio link reconfiguration preparation. a radio link reconfiugration preparation message, a radio link reconfiguration request message, or the like;

In the above message of the above process, one or more of the following information units may be included, but the information is generally not configured in one message at the same time: "HS-DSCH TDD Information", "HS-DSCH Information To Modify,, and" HS-DSCH Information To Modify Unsynchronised".

The present invention provides a method for the Node B to generate TPC parameters for HS-SICH closed loop power control. As shown in FIG. 2, the method includes the following steps:

Step 201: First, when the RNC configures and updates the high-speed shared information channel TPC step size parameter for the UE, the RNC also configures and updates the high-speed shared information channel TPC step size parameter for the Node B accordingly;

Step 202: The Node B knows the high-level configuration parameters Ack-Nack power offset and HS-SICH SIR Target, obtains the high-speed shared information channel TPC step size, and the Node B measures the actual power value of the HS-SICH: PHS.SICH (measured value), and decoding the ACK/NACK information carried on the HS-SICH;

Step 203: First, the Node B determines whether the ACK/NACK information is an ACK, and obtains an HS-SICH transmit power value calculated by the UE in a higher layer according to the following formula: PHS-SICH;

Step 204: When the ACK/NACK information is ACK,

PHS-SICH (measured value) - Ack-Nack power offset;

Step 205: When the ACK/NACK information is NACK, PHS-SICH ⁼ PHS-SICH (measured value);

Step 206: Then, compare the target value of the HS-SICH with the PHS- _SI CH calculated by the UE in step 204 or 205 to calculate the TPC;

Step 207: When PHS-SICH > HS-SICH SIR Target, the TPC command is set to "down" (down)

Step 208: When PHS.SICH <= HS-SICH SIR Target, the TPC command is set to "up" (up);

Step 209: The Node B further adjusts the TPC command generated in step 207 or 208 according to the comparison result between the predicted power value of the HS-SICH and the HS-SICH transmit power configured by the UE upper layer.

The Node B predicts the transmit power value of the HS-SICH configured by the UE in the upper layer according to the transmit power value of the HS-SICH configured by the UE at the last time, the last TPC command, and the HS-SICH TPC step size. The method is as follows:

When the last TPC command generated by Node B is "down":

This HS-SICH predicted power value = HS-SICH power value of the last UE high-level configuration - TPC step size

When the last TPC command generated by Node B is "up":

This HS-SICH predicted power value = HS-SICH power value of the last UE high-level configuration + TPC step size

Where: TPC step size is a power control step size.

Step 210: Compare whether the predicted power value of the HS-SICH matches the HS-SICH transmit power value of the UE high-level configuration.

Step 211: When the predicted power value of the HS-SICH matches the HS-SICH transmit power value configured by the UE, the Node B will not modify the TPC command generated by the step 207 or 208, and proceeds to step 214;

Step 212: When the predicted power value of the HS-SICH does not match the HS-SICH transmit power value of the UE high-level configuration, and it is determined in step 213 that the previous "several" comparison result does not match, the Node B will modify step 207. Or 208 generated TPC command, such as: modify the TPC command "down" generated in step 207 to "up", or modify the TPC command "up" generated in step 208 to "down", wherein Compare "several times,,, can be 3 ~ 5 times;

If it is determined in step 213 that the previous comparison results are consistent, then go to step ² 11; Step 214: Finally, the Node B calculates the obtained TPC command word, which is carried on the HS-SCCH physical channel, and is sent to the UE for the HS-SICH closed-loop control process of the UE.

In summary, the present invention implements a power control step size parameter HS-SICH TPC step size for a wireless network controller to configure a high-speed shared information channel for a Node B, and the Node B uses the parameter to generate and adjust a high-speed shared information channel. Transmit power control command TPC, which can better realize the industrial applicability of closed-loop power control for HS-SICH

The invention provides a method for configuring a Node B high-speed shared information channel power control parameter, and implements a power control of a high-speed shared information channel for a Node B in a time-division synchronous code division multiple access TD-SCDMA system. The step size parameter HS-SICH TPC step size, and the Node B uses this parameter to generate and adjust the transmit power control command TPC for the high speed shared information channel, which can better realize the closed loop power control of the HS-SICH.

Claims

Claim

A method for configuring a high-speed shared information channel "TPC step size" parameter for a node B by a network-side upper layer, wherein the method includes:

When the high-level shared information channel "TPC step size" parameter 5 is configured for the user equipment, the network-side upper layer also sends the parameter to the node through the high-level signaling of the NBAP protocol to configure the high-speed shared information channel "TPC step size" for the node B. parameter.

2. The method according to claim 1, wherein the network side high layer is a radio resource control layer of the radio link controller.

The method according to claim 1, wherein the network side high layer provides a "TPC step size" parameter including a high speed shared information channel in a message sent to the Node B during execution of the NBAP 0 protocol. Information unit to send the "TPC step size" parameter to Node B.

4. The method according to claim 3, wherein the NBAP protocol execution process comprises: a radio link setup process, a radio link addition process, and a synchronous radio link reconfiguration preparation.

L5 process, or asynchronous wireless link reconfiguration process.

5. The method according to claim 3, wherein the message comprises: a radio link setup request message, a radio link add request message, a radio link reconfiguration preparation message, or a radio link reconfiguration request message .

6. The method of claim 3, wherein the information element comprises "HS-DSCH Z0 TDD Information", "HS-DSCH Information To Modify", and HS-DSCH

Information To Modify Unsynchronised" ₀

A method for configuring a "TPC" parameter for high-speed shared information channel closed-loop power control, wherein the method includes the following steps:

25 (1) When the "TPC step size" parameter is configured for the user equipment by the network-side higher layer, the parameter is also sent to the node B through the high-level signaling of the NBAP protocol, and the "TPC step size" parameter is configured for the node B;

(2) Node B acquires the parameters "Ack-Nack power offset" and "HS-SICH" configured by the upper layer. SIR Target" and "TPC step size", obtain the actual power measurement value P _HS _ _{SICH of the} high speed shared information channel, and decode the ACK/ACK information carried on the high speed shared information channel;

(3) The Node B obtains the transmit power of the high-speed shared information channel configured by the upper layer of the user equipment according to the parameter "Ack-Nack power offset" of the high-level configuration, the measured P _HS - _SICH , and the ACK/NACK information obtained by decoding. value;

(5) The Node B transmits the power value according to the high-speed shared information channel configured by the upper layer of the user equipment last time, the value of the "TPC" parameter generated by the Node B last time, and the "TPC step" configured by the network-side upper layer as the Node B. The size" parameter calculates the predicted power value of the high-speed shared information channel;

(6) The Node B compares the current high-speed shared information channel predicted power value with the transmit power value of the local high-speed shared information channel configured by the user equipment upper layer, and determines the current "TPC" according to the comparison result adjustment. "The value of the parameter.

8. The method of claim 7, further comprising the steps of:

(7) Node B carries the "TPC" parameter determined by the current adjustment on the high-speed shared control channel, and sends it to the user equipment.

The method according to claim 7, wherein the network side high layer is a radio resource control layer on the network side.

The method according to claim 7, wherein in the step (3): when the ACK/NACK information is ACK, the transmit power of the high-speed shared information channel configured by the upper layer of the user equipment is received by the Node B. Subtracting the "Ack-Nack power offset" parameter value from the actual power measurement value PHS-SICH of the high speed shared information channel;

When the ACK/NACK information is NACK, the transmit power of the high-speed shared information channel configured by the upper layer of the user equipment is the actual power measurement value of the high-speed shared information channel received by the Node B.

The method according to claim 7, wherein in the step (4): if the transmit power value of the high-speed shared information channel configured by the user equipment is higher than The "HS-SICH SIR Target" parameter sets the "TPC" parameter to "down"; if the transmit power value of the high-speed shared information channel configured by the user equipment is less than or equal to the "HS-SICH SIR Target" For the parameter, set the "TPC" parameter to "up".

12. The method according to claim 7, wherein in the step (5): when the "TPC" parameter generated by the node B last time is "down", the current high-speed shared information channel predicted power value - The high-speed shared information channel transmit power value configured by the user equipment upper layer last time minus the "TPC step size" parameter configured by the network side upper layer for the node B;

The method according to claim 7, wherein in the step (6): when the current high-speed shared information channel predicted power value and the local high-speed shared information channel configured by the user equipment upper layer When the transmit power values match, the value of the "TPC" parameter determined in step (4) is not modified;

When the current high speed shared information channel predicted power value does not match the transmit power value of the local high speed shared information channel configured by the user equipment upper layer, the "TPC" parameter value determined in step (4) is modified.

14. The method according to claim 13, wherein the step (6) further comprises:

When the current high-speed shared information channel predicted power value does not match the transmit power value of the local high-speed shared information channel configured by the upper layer of the user equipment, and the comparison results of the consecutive multiple times before the comparison do not match, the modification is performed in the step. The value of the "TPC" parameter determined in (4).

The method according to claim 13 or 14, wherein the modifying step, if the initially determined "TPC" parameter is "up", then modifying it to "down"; if the preliminary If the determined "TPC" parameter is "down", modify it to "up".

The method according to claim 7, wherein in the step (1), the network side high layer provides the "TPC step" in the message sent to the node B during the execution of the BAP protocol. The information element of the size" parameter to send this parameter to Node B.

17. The method of claim 7 wherein said step u) A,

The NBAP protocol process includes: a radio link setup procedure, a radio link addition procedure, a synchronous radio link reconfiguration preparation process, or an asynchronous radio link reconfiguration procedure.

The method according to claim 7, wherein in the step (1), the message comprises: a radio link setup request message, a radio link add request message, a radio link reconfiguration preparation message, Or a radio link reconfiguration request message.

The method according to claim 7, wherein in the step (1), the information unit includes "HS-DSCH TDD Information", "HS-DSCH Information To Modify", and "HS-DSCH Information". To Modify Unsynchronised,,.