CN1829223B - A method for configuring transmission format combination parameters of time division duplex code division multiple access system - Google Patents
A method for configuring transmission format combination parameters of time division duplex code division multiple access system Download PDFInfo
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- CN1829223B CN1829223B CN200510054092A CN200510054092A CN1829223B CN 1829223 B CN1829223 B CN 1829223B CN 200510054092 A CN200510054092 A CN 200510054092A CN 200510054092 A CN200510054092 A CN 200510054092A CN 1829223 B CN1829223 B CN 1829223B
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Abstract
本发明公开一种时分双工码分多址系统传输格式组合参数配置方法，无线网络控制器发送不同计算传输格式组合序列给用户终端和节点B，并给其配置相同的传输格式组合指示字长，用户终端和节点B按照接收到的计算传输格式组合序列和传输格式组合指示字长形成传输格式组合集，本方法避免现有技术中TFCS数据配置不一致的情况，充分保证Node B和UE中存储的TFCS完全正确且相同，TFCI字长也可以保证满足TFCS对于编码长度的要求。
The invention discloses a method for configuring transmission format combination parameters of a time division duplex code division multiple access system. A wireless network controller sends different calculated transmission format combination sequences to user terminals and node B, and configures them with the same transmission format combination indicator word length. , the user terminal and Node B form a transport format combination set according to the received calculated transport format combination sequence and transport format combination indicator length. This method avoids the inconsistency of TFCS data configuration in the prior art, and fully guarantees The TFCS is completely correct and the same, and the TFCI word length can also guarantee to meet the TFCS requirements for the code length.
Description
Technical Field
The invention relates to a data transmission technology in a third generation mobile communication system, in particular to a configuration method for coordinating and conforming transmission format combination parameters and transmission format combination indicator word lengths among a Radio Network Controller (RNC), a node B (NodeB) and a User Equipment (UE) in a time division duplex code division multiple access communication system.
Background
Code Division Multiple Access (CDMA) is the mainstream technology of the currently accepted third generation mobile communication system, and includes two Frequency Division Duplex (FDD) technologies and a Time Division Duplex (TDD) technology.
In the 3GPP (3rd Generation Partnership Project) specification, a transport channel is used to carry a transport service of data between a physical layer and a Medium Access Control (MAC) layer, and to enable transmission of transport blocks over a radio interface and indication of status information of the physical layer to the MAC layer. The content of the transport channel exchange mainly relates to the communication between peer entities, which defines how and with what characteristics data is transferred. In order to improve the transmission characteristics of the wireless channels, the physical layer combines the data received on one or more Transport channels to form one or more Coded Composite Transport channels (CCTrCH), each Transport Channel to be multiplexed has a respective Transport Format Set (TFS), but at each given time point, the MAC submits only a specific subset of each Transport Channel to the physical layer, and the CCTrCH is formed by combining the data and then mapped to the physical Channel by the physical layer. An effective Combination of Transport Format sets of a plurality of Transport channels is called Transport Format Combination (TFC), which is identified by a Transport Format Combination Indicator (TFCI). The Set of all Transport format combinations on a CCTrCH constitutes a Transport Format Combination Set (TFCS).
The configuration of TFCS is completed by RNC in RRC layer (Radio Resource Control) signaling, it does not necessarily contain all possible combinations in the transport format set of the related transport channels, and the specific configuration method of RNC to TFCS of Node B and UE is performed by TS 25.433 protocol of Iub interface and TS 25.331 protocol of Uu interface, respectively. In the TS 25.331 protocol, a Calculated Transport Format Combination (CTFC) is defined for each TFCI to uniquely identify the Transport format adopted by each Transport channel in the CCTrCH.
Wherein,
1, 2, 1, L, and L0I is the number of transport channels in the CCTrCH, TrCH per transport channeliHaving LiTransport format, TFIi∈{0，1，2，..，Li-1}。
As shown in fig. 1, a schematic diagram of 1 TFC in a TFCS corresponding to a CCTrCH, where each CCTrCH is composed of 1 or more transport channels (trchs), each transport channel has 1 or more Transport Formats (TFs) to form a transport format set, and then an ith transport channel has j transport formats which can be expressed as: TFSi＝{TFi，0，TFi，1....TFi，j-1TFCS over }.1 CCTrCHs is defined as { TFCiI is 1, … I, where I is the number of transport format combinations in the TFCS, i.e., TFCS size.
In practical use, the TFCS of 1 CCTrCH is formed by taking out a plurality of TFCs from a TFC complete set, and each TFC is taken from each TFCThe number of TFCs is 1 TF in the TFS of the TrCH, and indicates how many transport format combinations the TFCs has (that is, the number of TFCs is equal to TFCs size). Such as TrCH1Taking TF1，1From TrCH2Taking TF2，0,., from TrCHiTaking TFi，j…, from TrCHITaking TFI，Li-1And the nth TFCnCan be expressed as { TF1，1，TF2，0，...TFi，j，....，TFI，Li-1}. When the practical TFCS used by 1 CCTrCH is { TFC0，TFC1...TFCk-1When it is, the TFCS size of the CCTrCH is equal to k, i.e., the number of TFCS is equal to k.
In order to realize correct coding and decoding of the opposite terminal when transmitting and receiving data, the RNC configures 1 TFCS of CCTrCH for Node B and UE, the TFCS stored in Node B and UE must be the same, and the corresponding relationship between each TFC and TFCI in TFCS must be the same.
When RNC configures TFCS for Node B and UE, TFC in TFCS needs to be configured to Node B and UE, RNC sends TFC to Node B through Iub interface and TFC in TFCS to UE through Uu interface, actually, RNC realizes TFC configuration by sending CTFC parameter sequence respectively, each CTFC parameter corresponds to 1 TFC one by one. After receiving the CTFC parameter sequence from RNC, Node B and UE process and calculate to obtain corresponding TFC, and according to the sequence of the received CTFC sequence, each TFC is corresponded with each TFCI in turn to form TFCS of the CCTrCH.
TFCI with value of 0(TFCI is 0, namely TFCI) in TDD CDMA communication system0) The corresponding TFC is configured by Node B and UE by default and reserved for use when Special Burst is sent to the physical layer. Each TFCS must contain an EmptyTFC which is characterized in that each TF constituting it is an Empty TF, which means that the size of a Transport Block set size is 0. For example, in the TFCI sequence (TFCI 0, 1.., N-1), N indicates that there are N TFCS for CCTrCH, TFCS size is equal to N, except for TFCI0The corresponding TFC is Node B and UE default configurationEach TFCI is set to be an Empty TFC, and corresponds to 1 CTFC parameter, i.e., 1 TFC.
In the TS 25.433 protocol of Iub interface, the correspondence between the CTFC and TFCI that the RNC transmits to the Node B is: the TFCI corresponding to the 1 st CTFC is 0, the TFCI corresponding to the 2 nd CTFC is 1, and so on. However, the Node B constructs a CTFC corresponding to TFCI of 0 by itself, and ignores the correspondence between the 1 st CTFC in the transport format combination table transmitted from the RNC and the TFCI having a value of 0.
As shown in FIG. 2, Node B receives the CTFC parameter sent by RNC, and Node B receives the first CTFC parameter (CTFC for short)1) Corresponding to TFCI equal to 0(TFCI for short)0) Second CTFC parameter (abbreviated CTFC)2) Corresponding to TFCI equal to 1(TFCI for short)1) The same goes for the rest. Thus, when the number of CTFC parameter sequences transmitted by RNC is n, all TFC contents { TFCI I of Node B0，TFCI1，...TFCIn-1Is corresponding to { CTFC1，CTFC2，....CTFCnAnd i.e.:
then, the Node B processes, the Node B ignores the received corresponding TFCI0CTFC1And the internal default configuration of the Node B is adopted and reserved for the physical layer.
Finally, the TFCS contents corresponding to 1 CCTrCH stored by the Node B are: { TFCI0，TFCI1，...TFCIn-1Is corresponding to { CTFCNode B Default value，CTFC2，....CTFCnAnd i.e.:
in the corresponding relation between the CTFC and the TFCI transmitted to the UE by the RNC, the TS 25.331 protocol indicates that the TFCI corresponding to the 1 st CTFC is 1, the TFCI corresponding to the 2 nd CTFC is 2, and so on. After receiving all TFCs sent by the RNC, the UE automatically adds a transport format combination with TFCI value of 0 and generates a TFCS.
As shown in fig. 3, the UE receives the CTFC parameters sent by the RNC, and the UE will receive the first CTFC parameter (abbreviated as CTFC)1) Corresponding to TFCI equal to 1(TFCI for short)1) Second CTFC parameter (abbreviated CTFC)2) Corresponding to TFCI equal to 2(TFCI for short)2) The same goes for the rest. Thus, when the number of CTFC parameter sequences transmitted by RNC is n, the TFCS content received by Node B is { TFCI1，TFCI2，...TFCInCorresponding to { CTFC1，CTFC2，....CTFCnAnd i.e.:
then, the UE performs processing, and the UE increases TFCI to 0 (abbreviated as TFCI)0) Corresponding CTFC (CTFC for short)0) The CTFC value is configured by default inside the UE and reserved for the physical layer.
Finally, 1 CC stored by the UEThe TFCS content of the TrCH is: { TFCI0，TFCI1，...TFCInIs corresponding to { CTFCUE Default value，CTFC1，....CTFCnAnd i.e.:
the general operation habit is that the RNC uses the same data to perform TFCS configuration for the Node B and the UE, but as described above, the CTFC parameter processing modes sent by the Node B and the UE to the RNC are different, and the same configuration causes coding and decoding errors of the TFCS used by the Node B and the UE for the CCTrCH.
For example, for NodeB, when the number of CTFCs is 2, the number of TFCIs is 2, and the numbers are 0 and 1, at this time, two TFCIs only occupy 1 bit, and if data modulation is performed by using QPSK, the length of the TFCI code word (TFCI code word) should be 4; for the UE, when the number of CTFCs is 2, the number of TFCIs is 2, the numbers are 1 and 2, the number of TFCI is 0, and special burst is reserved, when the TFCI is 2, 2 bits are occupied, and if data modulation is performed by using QPSK, the length of the TFCI codeword should be 8 instead of 4. This means that when the RNC sends the same number of CTFCs to the UE and the NodeB, if the RNC uses the same configuration data for the Node B and the UE, the number of CTFCs at the UE side will be 1 more, which results in the inconsistency between the number of CTFCs and the code length of the TFCI codeword, but the current protocol and the prior art do not have a method for solving this problem.
Disclosure of Invention
The technical problem solved by the invention is that the configuration modes of CTFC and TFCI on Iub and Uu interfaces are not consistent in the prior art, thereby causing the TFCS data configuration of NodeB and UE to be inconsistent when RNC adopts the same configuration data for NodeB and UE.
In order to solve the above technical problem, the present invention provides a method for configuring transmission format combination parameters of a time division duplex code division multiple access system, wherein a radio network controller sends different calculated transmission format combination sequences to a user terminal and a node B, and configures the same transmission format combination indicator length for the user terminal and the node B, and the user terminal and the node B form a transmission format combination set according to the received calculated transmission format combination sequences and the received transmission format combination indicator length.
Further, the radio network controller sends different calculated transport format combination sequences to the user terminal and the node B, which means that the calculated transport format combination sequence sent by the radio network controller to the node B is a calculated transport format combination added in front of the calculated transport format combination sequence sent to the user terminal.
Further, the transmission format combination indicator word length configured to the user terminal and the node B by the radio network controller is calculated by adding 1 to the calculated number of transmission format combinations sent to the user terminal, or directly calculated according to the calculated number of transmission format combinations sent to the node B.
Further, the radio network controller configures the transport format combination indicator word length by:
if the calculated transport format combination parameters sent to the user terminal and the node B by the wireless network controller both contain the calculated transport format combination corresponding to the empty transport format combination, the transport format combination indicator word length configured to the user terminal and the node B is calculated by adding 1 to the number of the transport format combinations in the transport format combination set;
if none of the calculated transport format combination parameters sent to the user terminal and the node B by the radio network controller contains the calculated transport format combination corresponding to the empty transport format combination, the transport format combination indicator word length configured to the user terminal and the node B is calculated according to the number of the transport format combinations in the transport format combination set;
if the calculated transport format combination parameters sent to the user terminal by the radio network controller do not contain the calculated transport format combination corresponding to the empty transport format combination, and the calculated transport format combination parameters sent to the node B contain the calculated transport format combination corresponding to the empty transport format combination, the first calculated transport format combination sent to the node B by the radio network controller must be the calculated transport format combination corresponding to the empty transport format combination, and the transport format combination indicator word length configured to the user terminal and the node B is calculated according to the number of the transport format combinations in the transport format combination set.
The invention has the beneficial effects that: aiming at the condition that the processing modes of the UE and the NodeB for the CTFC transmitted by the RNC are different, the RNC transmits different CTFC sequences to the UE and the NodeB, so that the TFCS stored by the UE and the NodeB after processing is consistent, the word length of the TFCI to be configured is the same, the condition that the TFCS data configuration in the prior art is inconsistent can be avoided, the TFCS stored in the Node B and the UE is completely correct and the same, and the word length of the TFCI can also meet the requirement of the TFCS on the coding length.
Drawings
FIG. 1 is a schematic diagram of 1 TFC in TFCS corresponding to CCTrCH
FIG. 2 is a schematic diagram of a physical layer covering a first CTFC
FIG. 3 is a physical layer increasing TFCI0Schematic diagram of corresponding TFC
FIG. 4 is a diagram of Node B and UE processing after the RNC sends different CTFCs in the present invention
Detailed Description
The following detailed description of specific implementations of the invention is provided in connection with the accompanying drawings.
After the RNC sends the CTFC parameters to the Node B and the UE, the Node B and the UE process the parameters in the current 3GPP protocol, that is: node B and UE processes the parameter differently. In order to ensure that the TFCS stored in the Node B and the UE are the same, the CTFC parameters and sequences sent by the RNC to the Node B and the UE in the invention need to be different so as to adapt to different processing modes of the Node B and the UE, namely, when the CTFC sequence sent by the RNC to the UE is { CTFC1，CTC2，...，CTFCnWhen it is, the CTFC sequence sent by RNC to Node B is different, and RNC adds 1 CTFC before the CTFC sequencexForm a new CTFC sequence { CTFC ] to be sent to Node Bx，CTFC1，CTC2，...，CTFCnIn which CTFCxWill be overridden by default configuration in Node B, CTFC1，CTC2，...，CTFCnAnd exactly the same as sent to the UE. As shown in fig. 4, the specific processing procedure is as follows:
the CTFC sent by the RNC to the UE is CTFC1，CTFC2，...CTFCn(ii) a According to the protocol, the UE will CTFC1Corresponding to TFCI equal to 1 (TFCI)1)，CTFC2Corresponding to TFCI equal to 2 (TFCI)2)，....CTFCnCorresponding to TFCI as n (TFCI)n) (ii) a Meanwhile, UE adopts default configuration, and TFCI (transport format combination indicator) is increased to be 0 (TFCI)0) Reserved for the physical layer; TFCS finally stored by UE is { CTFCDefault configuration，CTFC1，....CTFCnThe first CTFC is configured by UE default (reserved for physical layer use), CTFC1，CTFC2，...，CTFCnIs configured by the RNC.
The CTFC sent by RNC to Node B is CTFC in turnX，CTFC1，...CTFCnWherein: CTFCXAdded additionally by RNC, CTFCi(i ═ 1, 2,. n) is identical to the CTFC parameters and sequences sent to the UE; node B will CTFC according to protocolxCorresponding to TFCI equal to 0 (TFCI)0)，CTFC1Corresponding to TFCI equal to 1 (TFCI)1)，....CTFCnCorresponding to TFCI as n (TFCI)n) Wherein: node B ignores TFCI as 0 (TFCI)0) Corresponding CTFCxThe default configuration of Node B is adopted and reserved for the physical layer; all TFC information finally stored by Node BInformation is { CTFCDefault configuration，CTFC1，...，CTFCnIn which CTFCDefault configurationFor reservation to physical layer use, CTFC1，CTFC2，...，CTFCnThe CTFC parameters and sequence transmitted by the RNC and sent to the UE are the same.
It can be seen from the above that, the CTFC parameters and sequences sent by the RNC to the Node B and the UE are different, and then the Node B and the UE have different processing modes, so that the TFCS stored by the Node B and the UE are consistent, and the RNC can configure the same TFCI word length for the Node B and the UE. The word length can be calculated directly according to the number of the CTFCs sent to the UE plus 1 or according to the number of the CTFCs sent to the Node B, or according to the number of TFCs in the TFCS, and the principles are the same.
How to configure the word size is described below by taking the number of TFCS in the TFCS as N as an example.
If the CTFC parameters sent by the RNC to the UE and the Node B both contain the CTFC corresponding to the Empty TFC, then: the number of CTFC parameters sent to the UE by the RNC is N, and the TFC default configuration added by the UE is added, the RNC calculates the TFCI code word sent to the UE and the Node B according to N +1, wherein the TFCI is 0, 1,.. N; the number of CTFC parameters sent to the Node B by the RNC is N +1, the RNC calculates a TFCI code word sent to the UE and the Node B according to the N +1, and the TFCI word is 0, 1.
If the CTFC parameters sent by the RNC to the UE and the Node B do not contain the CTFC corresponding to Empty TFC, then: the RNC less sends CTFC corresponding to Empty TFC, the number of CTFC parameters sent to the UE by the RNC is N-1, and the TFC default configuration added by the UE is added, the RNC calculates TFCI code word sent to the UE and Node B according to N, wherein TFCI is 0, 1. The number of CTFC parameters sent to NodeB by RNC is N, and the RNC calculates TFCI codeword sent to UE and NodeB according to N, wherein TFCI is 0, 1.
If the CTFC parameters sent to the UE by the RNC do not contain the CTFC corresponding to the Empty TFC, and the CTFC parameters sent to the Node B contain the CTFC corresponding to the Empty TFC, then: the RNC less sends CTFC corresponding to Empty TFC, the number of CTFC parameters sent to the UE by the RNC is N-1, and the TFC default configuration added by the UE is added, the RNC calculates TFCIcode word sent to the UE and Node B according to N, wherein TFCI is 0, 1. The number of the CTFC parameters sent to the Node B by the RNC is N, the TFC corresponding to the first CTFC sent by the RNC must be an Empty TFC, and the RNC calculates the TFCI code word sent to the UE and the Node B according to N, wherein the TFCI word is 0, 1.
As described above, the method of the present invention can make up for the defects caused by the inconsistent processing mode of the protocol without modifying the protocol, and fully ensure that the TFCS stored in the Node B and the UE are completely correct and the same.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161911C (en) * | 2002-02-06 | 2004-08-11 | 华为技术有限公司 | Method for mapping from calculated value of transport format combination to indication of transport format combination |
| CN1179529C (en) * | 1999-08-27 | 2004-12-08 | 艾利森电话股份有限公司 | Method and network for generating and informing transport format combination indicator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1179529C (en) * | 1999-08-27 | 2004-12-08 | 艾利森电话股份有限公司 | Method and network for generating and informing transport format combination indicator |
| CN1161911C (en) * | 2002-02-06 | 2004-08-11 | 华为技术有限公司 | Method for mapping from calculated value of transport format combination to indication of transport format combination |
Non-Patent Citations (3)
| Title |
|---|
| 3rd Generation Partnership Project * |
| ProtocolSpecification(Release 4).3GPP TS 25.331 V4.14.0.2004,3(253314140),265-267,457-458,469-470. * |
| Technical SpecificationGroup.Radio Access Network Radio Resource Control (RRC) * |
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