WO2009065273A1

WO2009065273A1 - A method for supporting the high order modulation and synchronization in the time division synchronous code division multiple access system

Info

Publication number: WO2009065273A1
Application number: PCT/CN2007/071110
Authority: WO
Inventors: Jing Zhao
Original assignee: Zte Corporation
Priority date: 2007-11-21
Filing date: 2007-11-21
Publication date: 2009-05-28
Also published as: CN101933265A

Abstract

A method for supporting high order modulation in the time division synchronous code division multiple access system and a method for implementing the synchronization of high order modulation between the terminal side and the network side are provided. First, in the frame structure of the high speed shared control channel, bits for indicating the manner of the high order modulation are configured, and in the physical layer class information of the high speed physical downlink shared channel, the ability types corresponding to the manner of the high order modulation are configured, and the transport block size of the ability type and the indexcontent thereof are added. During the setup of the radio link, the manner of the high order modulation used by the HS-DSCH are synchronized between the terminal side and the network side aiming at the high speed downlink packet access service.

Description

Method for supporting high-order modulation and synchronization in time-division synchronous code division multiple access system

Technical field

The present invention relates to the field of mobile communications, and more particularly to a method for supporting high-order modulation in a time division synchronous code division multiple access (TD-SCDMA) system and a method for implementing high-order modulation synchronization between a terminal side and a network side.

Background technique

In order to meet the rapidly growing demand for high-speed mobile data services (especially mobile Internet services), the 3rd Generation Partnership Project (3GPP) introduced HSDPA (High Speed Downlink Packet Access) in its specifications. Access) to accommodate the characteristics of its downlink traffic is generally greater than the uplink traffic.

In the HSDPA technology of the TD-SCDMA system, the newly introduced physical channels include: HS-PDSCH, HS-SCCH, HS-SICH three channels, wherein

The HS-PDSCH (High Speed Physical Downlink Shared Channel) is used to carry user data of the user;

The HS-SCCH (Shared Control Channel for HS-DSCH) is used to receive control information related to the HS-PDSCH channel by the UE (User Equipment);

The HS-SICH (Shared Information Channel for HS-DSCH) is used by the UE to feed back the reception quality of the HS-PDSCH channel to the Node B (Node B).

Each HS-SCCH channel is fixedly associated with one HS-SICH channel, and a pair of HS-SCCH and HS-SICH channels must belong to the same carrier frequency. A cell can have multiple carrier frequencies, and HSDPA services can be established on each carrier frequency. The UE can simultaneously receive HSDPA services on one or more carrier frequencies according to its own capabilities. Since the HS-PDSCH is a shared physical channel, the HS-PDSCH on one carrier frequency is shared by all users using HSDPA on the carrier frequency, and the physical channel scheduling between the UEs is completed in the NodeB.

Control of the UE by the channel HS-SICH and NodeB that the new UE feeds back to the Node B Channel HS-SCCH, UTRAN can change the modulation mode and TBSize (Transport Block Sizes) index in each transmission (Transmission Timing Interval) in real time according to the specific channel quality. The fixed DPCH (Downlink Physical Channel) channel and the RNC (Radio Network Controller) are relatively fixed radio resource allocation mechanisms, HS-DSCH (High Speed Downlink Shared Channel) , high-speed downlink shared channel) has the potential to use high-order modulation mode under the condition of good air channel quality, and the higher-efficiency high-order modulation mode will further improve the downlink transmission rate of HSDPA. For operators, It can attract more high-end users to use HSDPA services.

In the existing TD-SCDMA system, only the 16QAM and QPSK modulation modes can be supported in the HS-SCCH, but how to indicate the high-order 64QAM modulation mode and the network side in the HS-SCCH (High Speed Shared Control Channel) frame structure The problem of synchronous high-order modulation with the terminal side, there is no relevant solution in the existing standard protocol.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a method for supporting high-order modulation, and further to provide a method for high-order modulation synchronization to achieve a time-division synchronous code division multiple access system ( In TD-SCDMA, high-order modulation is supported and the high-order modulation mode of the terminal side and the network side is synchronized to improve the transmission rate of the high-speed downlink packet access service in the TD-SCDMA system.

The present invention provides a method for supporting high-order modulation in a time division synchronous code division multiple access system, comprising the steps of: configuring a bit for indicating a high-order modulation mode in a frame structure of a high-speed shared control channel; In the shared channel physical layer classification information, the capability category corresponding to the high-order modulation mode is configured, and the transport block size and the index content of the capability category are correspondingly increased.

Further, a manner of configuring a bit for indicating a high-order modulation mode, that is, 64QAM, in a frame structure of the high-speed shared control channel includes:

Using unused bits in the frame structure as bits indicating high order modulation; or Changing the definition of an existing bit, using the changed bit as a bit indicating a high-order modulation mode; or,

A new bit definition is added, and the added bit is used as a bit indicating a high-order modulation mode. Further, the bit for indicating the high-order modulation mode, that is, 64QAM is 1 bit: when the bit is set to 0, it means that the 64QAM modulation mode is not used, and the modulation mode indicated by the original frame structure is used. The modulation indicator bit is indicated;

When the bit is set to 1, it indicates that the 64QAM modulation mode is used, the modulation indication bit of the original frame structure is ignored, and the high-order modulation mode of the current indication is used.

Further, the step of configuring the capability class corresponding to the high-order modulation mode in the high-speed downlink shared channel physical layer classification information includes adding a classification suitable for QPSK, 16QAM, and 64QAM for the high-order modulation mode, that is, 64QAM, and correspondingly Define the transport block size of the classification and its index content.

The present invention also provides a method for implementing high-order modulation synchronization in a time division synchronous code division multiple access system, comprising the steps of: configuring a bit for indicating a high-order modulation mode in a frame structure of a high-speed shared control channel, and Adding capability information corresponding to the high-order modulation mode to the high-speed downlink shared channel physical layer classification information;

The terminal reports the information of the terminal supporting the high-order modulation and the capability information corresponding to the high-order modulation mode to the radio network controller by using the terminal capability report message;

The radio network controller sends, to the Node B, a radio link setup request message that uses the capability information corresponding to the high-order modulation mode;

The Node B returns to the radio network controller a radio link response message carrying an indication field of whether the terminal B supports downlink high-order modulation;

The radio network controller sends a radio bearer setup message to the terminal, and adds a field of the high-order modulation mode to the high-speed physical downlink shared channel information of the radio bearer setup message to notify the terminal that the high-speed shared control channel should be used. Frame structure. Further, the capability information corresponding to the high-order modulation mode is added to the high-speed downlink shared channel physical layer classification information, including the capability category corresponding to the high-order modulation mode, and the transport block size and index of the corresponding capability category. content.

Further, the high order modulation is 64QAM, or 256QAM.

Further, the synchronization method further includes:

The Node B uses the transport block size index of the high-order modulation corresponding class in the high-speed shared control channel under the condition that the channel quality is allowed, and notifies the terminal to use the high-order modulation mode in the current high-speed downlink shared channel by using the modulation mode indication bit. ;

The terminal receives the HS-SCCH control channel, and identifies the modulation mode of the current high-speed downlink shared channel according to a frame structure supporting high-order modulation:

When the indication field indicating the high-order modulation mode is set to true, the terminal performs demodulation using high-order modulation; otherwise, the terminal performs demodulation according to the modulation mode indicated by the modulation indication bit in the original frame structure.

Further, the synchronization method further includes:

The Node B notifies the radio network controller of the support information of the local cell to the high-order modulation by using the audit response and/or the resource status indication message;

After obtaining the cell support high-order modulation, the radio network controller increases the user's access grant rate in the radio resource management, and/or comprehensively considers the capability information in the load control.

Further, after receiving the radio link setup request message, the node B adds a field of whether the node B supports the downlink 64QAM or 256QAM modulation indication in the radio link failure response if the radio link establishment fails.

Further, a manner of configuring a bit in the frame structure of the high-speed shared control channel for indicating a high-order modulation mode, that is, 64QAM or 256QAM, includes:

Using a reserved bit that is not used in the frame structure as a bit indicating a high-order modulation mode; or changing a definition of an existing bit, using the changed bit as a bit indicating a high-order modulation mode; or

A new bit definition is added, and the added bit is used as a bit indicating a high-order modulation mode. Further, the bit used to indicate a high-order modulation mode, that is, 64QAM or 256QAM For 1 bit:

When the bit is set to 0, it means that the high-order modulation mode is not used, and the modulation mode indicated by the original frame structure is indicated by the modulation indication bit of the original frame structure;

When the bit is set to 1, it indicates that the high-order modulation mode is used, the modulation indication bit of the original frame structure is ignored, and the high-order modulation mode of the current indication is used.

Further, the step of configuring the capability class corresponding to the high-order modulation mode in the high-speed downlink shared channel physical layer classification information includes adding a classification suitable for QPSK, 16QAM, and 64QAM for the high-order modulation mode, that is, 64QAM, and correspondingly Define the transport block size and its index content for these categories.

The invention supplements and improves the 3GPP standard protocol. In the TD-SCDMA system, the HS-SCCH frame structure of the high-speed shared control channel is supported for the high-order modulation mode, and the high-order modulation of the network side and the terminal side is further realized. The synchronization mode improves the transmission rate of the high-speed downlink packet access service in the TD-SCDMA system. BRIEF abstract

Figure 1 is a schematic diagram of the process of the invention. Preferred embodiment of the invention

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings.

For the high-speed downlink packet access (HSDPA) service of the prior art, the HS-SCCH channel can only support 16QAM and QPSK modulation modes, and cannot indicate high-order 64QAM in the HS-SCCH (High Speed Shared Control Channel) frame structure. The modulation method and the problem that the network side and the terminal side cannot synchronize the high-order modulation mode, and the present invention provides a method for supporting high-order modulation, and a method for realizing high-order modulation synchronization on the network side and the terminal side, particularly in the TD-SCDMA system. .

In this embodiment, the technical solution of the present invention is described in detail by taking a high-order 64QAM modulation mode as an example. In order to implement the support of the present invention for high-order modulation, it is necessary to supplement the existing 3GPP protocol content, and thus the following definition configuration is required:

1. Modifying the frame structure of the HS-SCCH channel, and adding a bit for indicating the high-order modulation mode in the frame structure.

In the existing HS-SCCH frame structure, the lbit identification modulation mode is used, wherein the bit value is set to 0 to indicate that the modulation mode is QPSK, and the bit value is set to 1 to indicate 16QAM. Based on the existing frame structure, unused bits in the HS-SCCH frame structure may be utilized to indicate a high-order modulation mode. For example, a reserved bit of 1 bit may be used to indicate a 64QAM modulation mode, and the reserved bit is set. A value of 0 indicates that the 64QAM modulation mode is not used, and the modulation mode indicated by the previous modulation bit is indicated; the reserved bit is set to 1 to indicate that the 64QAM modulation mode is used, and the previous modulation indication bit is ignored, and the high order of the current indication is used. Modulation.

In the present embodiment, when the HS-SCCH frame structure is changed, the number of bits indicating the modulation mode is increased by one bit to enable it to represent a modulation scheme other than QPSK and 16QAM, such as high-order modulation 64QAM. However, the number of added bits is not limited to 1 bit, and may be multiple bits; the added bit may be an unused reserved bit, the definition of the existing bit may be changed, and a bit definition may be added for use. Indicates the high-order modulation method.

2. In the HS-DSCH physical layer classification information of the high-speed downlink shared channel, the capability class corresponding to the high-order modulation mode is added, and the transport block size (TBSize) of the new capability class and its index content are correspondingly increased.

Among the existing TD-SCDMA system single-frequency point HS-DSCH physical layer classification information, classifications 1 to 3 are only applicable to QPSK modulation methods, and classifications 4 to 15 are applicable to QPSK and 16QAM. In order to support the high-order modulation mode in the HSDPA service, it is necessary to classify 16 to 24 for the high-order modulation mode, that is, 64QAM, which is applicable to QPSK, 16QAM, and 64QAM. Accordingly, the transport block size ( TBSize ) of the classifications 16 to 24 and its TBSize index need to be defined.

It should be noted that the HS-DSCH physical layer is essentially the same as the HS-PDSCH channel in the background art. In the 3GPP standard protocol, the HS-DSCH physical layer is mainly used in the upper layer "transport layer" of the physical layer, and the HS- The PDSCH channel is mainly used when describing the physical layer concept. The following is a unified description using the HS-DSCH physical layer. The supplemental definition configuration of the existing 3GPP protocol content in the above one or two enables the high-speed shared control channel HS-SCCH (High Speed Shared Control Channel) to support the high-order modulation mode.

Based on the above-mentioned support configuration for the high-order modulation mode, synchronization of the high-order modulation modes on the terminal side and the network side can be further realized. The 64QAM modulation mode is taken as an example and the synchronization process of the high-order modulation is described with reference to FIG. The synchronization method includes the following steps:

Step 101: The terminal reports the terminal capability information to the radio network controller RNC, where the message reporting message carries information indicating whether the terminal supports high-order modulation, that is, 64QAM.

The capability message reported by the terminal includes physical channel capability information, and the physical channel capability information further includes physical layer classification information. The indication field of whether the terminal supports the high-order modulation is added to the physical channel capability information, that is, whether the terminal can demodulate the indication field of the HS-DSCH 64QAM.

If the terminal supports the high-order modulation mode, that is, the 64QAM modulation mode is supported, when the terminal reports the capability to the network side, the added 64QAM indication field in the physical channel capability information is set to true, and the physical channel capability information is used. The HS-DSCH physical layer classification information reports specific 64QAM capability information.

Step 102: When the terminal establishes a connection process with the network side, the RNC sends a radio link setup request message to the Node B (NodeB), and the HS-DSCH physical layer classification information in the radio link setup request message. The 64QAM capability class (ie, classes 16 to 24) defined by the supplement of the present invention is used to inform the NodeB that the terminal supports 64QAM capability information.

Step 103: The NodeB returns a radio link response message to the RNC, and adds an indication field of the NodeB to the terminal to support downlink 64QAM modulation in the radio link response message.

If the radio link setup fails, it is also necessary to add in the radio link failure response whether the NodeB supports the field of the downlink 64QAM modulation indication.

Step 104: When the air interface radio bearer is established in the connection process between the terminal and the network side, the RNC sends a radio bearer setup message to the terminal, and adds whether to use the 64QAM modulation mode in the HS-PDSCH information of the radio bearer setup message. Field to inform the terminal which HS-SCCH frame structure to use.

Through the above steps 101 to 104, the terminal side and the wireless connection establishment process are realized. Synchronization of the modulation method on the network side. That is, the terminal and the node B complete the negotiation process of the high-order modulation mode, and based on this, when the two parties perform the HSDPA service, the high-order modulation mode can be used to implement the service.

Therefore, after the modulation mode synchronization is implemented, as shown in step 301 of FIG. 1, the NodeB dynamically calculates the current signal-to-noise ratio and other parameters, and uses 6-bit bits in the HS-SCCH control channel under the condition that the channel quality allows. The number identifies the 64QAM new class TBSize index, and uses the HS-SCCH control channel 64QAM modulation mode indicator bit defined in this patent to inform the UE that the current HS-DSCH uses the 64QAM modulation mode. The UE receives the HS-SCCH control channel and identifies the current HS-DSCH modulation mode according to the frame structure supporting the high-order modulation. When the indication bit indicating that the 64QAM is set to true, the UE uses the high-order modulation to perform demodulation. Demodulation is performed according to the modulation mode indicated by the modulation bit in the original frame structure.

In this embodiment, after the supplementary definition configuration of the existing 3GPP protocol content is completed, the frame structure of the high-order modulation and the physical layer classification information added for the high-order modulation are supported based on the newly defined HS-SCCH channel, so that the high-speed sharing control is performed. The channel HS-SCCH can support high order modulation. The Node B can also notify the RNC of its own support information for the high-order modulation 64QAM by signaling.

In step 201, as shown in FIG. 1, the node B sends an audit response and/or a resource status indication message to the RNC, and adds an indication field of 64QAM to the audit response and/or the resource status indication message, that is, adding The local cell supports the capability field of downlink 64QAM modulation. The wireless network controller RNC can increase the user's access grant rate in RRM (Radio Resource Management) after receiving the high-order modulation of the cell. In the load control, the capability information can also be considered.

The present invention uses 64QAM as an example for detailed description, but is not limited thereto. For higher-order modulation modes, such as 256QAM implementation, reference may be made to the specific implementation of 64QAM, specifically, the modulation indication bit of 256QAM and HS are required. -DSCH channel physical layer classification information, when the modulation mode is synchronized between the network side and the terminal side, the 256QAM indication information and the classification capability information may be exchanged according to the above procedure.

The present invention has been described in terms of a preferred embodiment of the present invention, and is not intended to limit the invention, and various modifications and changes can be made by those skilled in the art. Therefore, any modifications, equivalent substitutions, improvements, and updates made within the spirit and principles of the present invention should include It is within the scope of the invention. Industrial applicability

A method for supporting high-order modulation and realizing high-order modulation synchronization on the terminal side and the network side in the time division synchronous code division multiple access system disclosed by the present invention. It compensates for the shortcomings of the existing 3GPP protocol, can increase the transmission rate of HSDPA, and opens up a larger commercial prospect for TD-SCDMA systems.

Claims

Claim

A method for supporting high-order modulation in a time-division synchronous code division multiple access system, comprising the steps of: configuring a bit for indicating a high-order modulation mode in a frame structure of a high-speed shared control channel; In the high-speed downlink shared channel physical layer classification information, the capability category corresponding to the high-order modulation mode is configured, and the transport block size and the index content of the capability category are correspondingly increased.

The method according to claim 1, wherein the manner of configuring the bit of the high-order modulation mode, that is, the 64QAM, in the frame structure of the high-speed shared control channel includes:

A new bit definition is added, and the added bit is used as a bit indicating a high-order modulation mode.

3. The method of claim 1 or 2, wherein

The bit used to indicate the high-order modulation mode, that is, 64QAM, is 1 bit:

When the bit is set to 0, it means that the 64QAM modulation mode is not used, and the modulation mode indicated by the original frame structure is indicated by the modulation indication bit of the original frame structure;

The method according to claim 1 or 2, wherein the step of configuring the capability class corresponding to the high-order modulation mode in the high-speed downlink shared channel physical layer classification information includes a high-order modulation mode, that is, 64QAM new The classifications applicable to QPSK, 16QAM, and 64QAM are added, and the transport block size of the classification and its index content are defined accordingly.

5. A method for implementing high-order modulation synchronization in a time division synchronous code division multiple access system, comprising the steps of: Configuring a bit for indicating a high-order modulation mode in a frame structure of the high-speed shared control channel, and adding capability information corresponding to the high-order modulation mode to the high-speed downlink shared channel physical layer classification information;

The radio network controller sends a radio bearer setup message to the terminal, and adds a field of the high-order modulation mode to the high-speed physical downlink shared channel information of the radio bearer setup message to notify the terminal that the high-speed shared control channel should be used. Frame structure.

The method according to claim 5, wherein the capability information corresponding to the high-order modulation mode is added to the high-speed downlink shared channel physical layer classification information, and the capability category corresponding to the high-order modulation mode is included. , and the transport block size and its index content of the corresponding capability category.

7. The method of claim 6 wherein:

The high order modulation is 64QAM, or 256QAM.

The method according to claim 7, wherein the synchronization method further comprises: the Node B utilizing the transport block of the high-order modulation corresponding class in the high-speed shared control channel under the condition that the channel quality allows a size index, the modulation mode indication bit is used to notify the terminal to use a high-order modulation mode on the current high-speed downlink shared channel;

9. The method according to claim ,, wherein the synchronizing method further comprises: the node reporting the support information of the high-order modulation of the local cell to the wireless network by using an audit response and/or a resource status indication message. Controller

10. The method of claim 7 wherein:

After receiving the radio link setup request message, the node 添加 adds a field of whether the node supports the downlink 64QAM or 256QAM modulation indication in the radio link failure response if the radio link setup fails.

11. The method of claim 7 wherein:

The manner in which the bit structure of the high-order modulation mode, that is, 64QAM or 256QAM, is configured in the frame structure of the high-speed shared control channel includes:

12. The method of claim 7 wherein:

The bit used to indicate the high-order modulation mode, that is, 64QAM or 256QAM, is 1 bit:

13. The method of claim 7 wherein:

The step of configuring the capability class corresponding to the high-order modulation mode in the high-speed downlink shared channel physical layer classification information includes adding a new-order modulation mode, that is, 64QAM, to QPSK and 16QAM. And the classification of 64QAM, and correspondingly define the transport block size of the classification and its index content.