CN1829130B - Method for collocating transformat combination parameter of TDD-CDMA system - Google Patents
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Abstract
The present invention discloses time division duplexing code division multiple access system transmission format combination parametric configuring method. It contains wireless networks controller transmitting same calculation transmission format combination parameter and sequence to node B and user terminal, configuring same transmission format combination indication word length to node B and user terminal, node B and user terminal receiving calculation transmission format combination parameter, according to same mode processing said parameter to form transmission format combination set, said method capable of avoiding TFCS data collocation incongruous status in current technology, wireless network controller not needing different configuration to user terminal and node B, said implementation method being portably, effectively and reducible error occurrence.
Description
Technical Field
The present invention relates to a data transmission technology in a third generation mobile communication system, particularly 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-1}. TFCS over 1 CCTrCH is defined as { TFCiI is 1, … I, where I is the number of transport format combinations in the TFCS, i.e., TFCS size.
In actual use, the TFCS of 1 CCTrCH is formed by taking several TFCS from the TFC full set, each TFC is formed by taking 1 TF from the TFS in each TrCH, and the number of TFCS 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 Empty TFC which is characterized in that each TF constituting it is an Empty TF, which means that the size (Transport Block set size) of a Transport Block set 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 configured as Empty TFC by default for Node B and UE, and each TFCI corresponds to 1 CTFC parameter, namely 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 RNC sends outWhen the number of the transmitted CTFC parameter sequences is n, the TFCS content received by the 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, the TFCS contents of 1 CCTrCH stored by the UE are: { 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 the calculated transmission format combination parameters and sequences sent to a node B and a user terminal by a radio network controller are the same, the transmission format combination indicator word lengths configured for the node B and the user terminal are the same, after the node B and the user terminal receive the calculated transmission format combination parameters, the node B processes the parameters in a manner completely consistent with the parameters processed by the user terminal or the user terminal processes the parameters in a manner completely consistent with the parameters processed by the node B.
Further, the mode of processing and calculating the transport format combination parameter by the node B and the user terminal is as follows: the node B and the user terminal receive the first calculation transmission of the wireless network controllerTransport format combination parameter corresponding to TFCI being 1, i.e. TFCI1The second CTFC parameter corresponds to TFCI 2, i.e., TFCI2The rest are analogized in turn and are marked as { CTFCiIs mapped to { TFCI }iN, wherein i is 1, 2,. n; at the same time, node B and user terminal use the same principle to increase TFCI to 0, i.e. TFCI0And reserving the corresponding TFC configuration for the physical layer to use when the special burst is sent. The transmission format combination indication word length configured by the radio network controller to the node B and the user terminal is calculated according to the number of the calculated transmission format combinations which are actually sent plus 1. Or the wireless network controller configures the transmission format combination indicator word length according to the following mode:
if the calculated transport format combination parameters sent to the node B and the user terminal by the wireless network controller both contain the calculated transport format combination corresponding to the empty transport format combination, calculating according to the number of the transport format combinations in the transport format combination set plus 1;
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.
Further, the mode of processing and calculating the transport format combination parameter by the node B and the user terminal is as follows: the node B and the user terminal receive the first calculated TFCI parameter of the RNC, which corresponds to TFCI 00The second CTFC parameter corresponds to TFCI 1, i.e., TFCI1The rest are analogized in turn and are marked as { CTFCiN, corresponding to TFCI { TFCI ═ 1, 2iN-1, } { i ═ 0, 1, 2.; the first calculated TFCI parameter transmitted by the RNC, i.e. corresponding to TFCI0The node B and the user terminal ignore the special burst, and the node B and the user terminal adopt the same principle to carry out configuration and reserve the special burst for the physical layer to use when sending the special burst. Transport format combination indicator configured by radio network controller for node B and user terminalThe length is calculated from the calculated number of tfcs actually transmitted. Or the wireless network controller configures the transmission format combination indicator word length according to the following mode:
if 1 additional calculation transport format combination is added to the wireless network controller for being covered by the physical layer, and the calculation transport format combination parameters sent by the wireless network controller contain the calculation transport format combination corresponding to the empty transport format combination, the word length is calculated by adding 1 to the number of the transport format combinations in the transport format combination set;
if 1 additional calculation transport format combination is added to the wireless network controller for being covered by the physical layer, and the calculation transport format combination parameters sent by the wireless network controller do not contain the calculation transport format combination corresponding to the empty transport format combination, the word length is calculated according to the number of the transport format combinations in the transport format combination set;
if the radio network controller does not add any extra calculated tfc for being covered by the physical layer, the first calculated tfc sent to the node B by the radio network controller must be the calculated tfc corresponding to the empty tfc, and the tfc indicator length allocated to the ue and the node B is calculated according to the tfcs in the tfc set.
The invention has the beneficial effects that: the method of the invention changes the calculation transmission format combination parameters sent by the wireless network controller processed by the user terminal and the node B into the same ones, the wireless network controller can send the calculation transmission format combination parameters by the same configuration, and the same transmission format combination indicator word length is configured, thus avoiding the situation that the TFCS data configuration is not consistent in the prior art, and the wireless network controller does not need to make two different configurations for the user terminal and the node B, the realization method is simple and effective, and the error can be reduced.
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
Detailed Description
The following is a detailed description of specific implementations of the method of the present invention.
The first embodiment is as follows:
the CTFC parameters and sequences sent by RNC to Node B and UE are the same, and the mode of Node B and UE processing the parameters is the same, so it can ensure the TFCS stored in Node B and UE is the same. Therefore, in the protocol TS 25.433, after receiving the CTFC parameter from the RNC, the Node B needs to modify the processing method of the parameter, that is: in a manner that is completely consistent with the UE processing the parameters. The method specifically comprises the following steps:
the RNC sends the same CTFC parameters and sequences to the Node B and the UE.
After receiving the CTFC parameters, the UE has a processing mode consistent with the current protocol, that is: the UE receives the first CTFC parameter of the RNC as TFCI 1, the second CTFC parameter as TFCI 2, and so on, that is: { CTFCiN, corresponding to { TFCI ═ 1, 2iN, 1, 2. And when the TFCI is 0, the corresponding CTFC parameter is configured by the UE by default and reserved for the physical layer.
After Node B receives CTFC parameters, the processing mode is different from the current protocol, and needs to be changed to the processing mode consistent with UE, that is: the Node B receives the first CTFC parameter from RNC as TFCI ═ 1 (TFCI)1) The second CTFC parameter is TFCI 2 (TFCI)2) The rest are analogized in turn, and TFCI is 0 (TFCI)0) The corresponding TFC parameter is configured by Node B default and reserved for the physical layer.
Thus, all TFC information finally stored by Node B and UE are the same and are { CTFCDefault value,CTFC1,CTFC2,...,CTFCnIs mapped to { TFCI }iN, where the first CTFC (CTFC) is 0, 1Default value) The Node B and the UE take the same default configuration and correspond to the TFCI0And the CTFC is reserved for the physical layer, and other CTFCs are configured by the RNC, so that the RNC can configure the Node B and the UE with the same TFCI word length. The configuration word length can be calculated by adding 1 to the number of CTFCs actually sent by the RNC, or calculated by the number of TFCS in the TFCS, and the principle is 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 include the CTFC corresponding to Empty TFC, that is, the number of the CTFC parameters actually sent by the RNC is N, and 1 default configuration is added, then: the RNC calculates TFCI code word sent to the UE and the Node B according to the N +1, wherein TFCI is 0, 1.
If the CTFC parameters sent by the RNC do not contain the CTFC corresponding to the Empty TFC, the CTFC corresponding to 1 Empty TFC is sent less, namely the number of the CTFC parameters actually sent by the RNC is N-1; and adding 1 default configuration of UE or Node B, then: the RNC calculates TFCI code word sent to the UE and the NodeB according to N, wherein TFCI is 0, 1.
Example two:
the embodiment is similar to the method one, but compared with the 3GPP protocol, the processing method of the CTFC parameter of the UE is modified to be consistent with the processing method of the Node B. Specifically, the CTFC parameters and sequences sent by RNC to Node B and UE are the same, and the mode of Node B and UE processing the parameters is the same, so it can ensure the TFCS stored in Node B and UE is the same. Therefore, in the protocol TS 25.331, after the UE receives the CTFC parameter from the RNC, the parameter is processed in a manner completely consistent with that of the Node B. The method specifically comprises the following steps:
the RNC sends the same CTFC parameters and sequences to the Node B and the UE.
After Node B receives CTFC parameter, the processing mode is consistent with the current protocol, namely: node B receives the first CTFC parameter (CTFC) of RNC1) Corresponding TFCI is equal to 0 (TFCI)0) Second CTFC parameter (CTFC)2) Corresponding TFCI is equal to 1 (TFCI)1) Others by analogy, { CTFCiN, corresponding to { TFCI ═ 1, 2iN-1, i ═ 0, 1, 2. And when TFCI is 0, the transmitted CTFC parameter is ignored by Node B and reserved for physical layer.
After receiving the CTFC parameters, the UE needs to change the processing mode to the processing mode consistent with the Node B, which is different from the current protocol, that is: the UE receives the first CTFC parameter from the RNC as TFCI 0 (TFCI)0) The second CTFC parameter is TFCI 1 (TFCI)1) The rest are analogized, and TFCI is 0 (TFCI)0) The transmitted CTFC parameters are ignored by the UE, are configured by the Node B by default and are reserved for the physical layer to use.
Thus, the TFCS finally stored by Node B and UE are the same and are { CTFC }Default value,CTFC2,CTFC3,...,CTFCnIs mapped to { TFCI }iN-1, with the first CTFC (CTFC)Default value) The Node B and the UE adopt the same principle default configuration and are reserved for the physical layer to use, and other CTFCs come from the RNC, so the RNC can configure the same TFCI word length for the Node B and the UE. The configuration word length can be calculated according to the number of CTFCs actually sent by the RNC, or according to the number of TFCS in the TFCS, and the principle is 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 contain the CTFC corresponding to Empty TFC and 1 additional CTFC is not added, then: the number of the CTFC parameters sent by the RNC is N, the CTFC corresponding to the Empty TFC must be used as the first CTFC to be sent, and the RNC calculates a TFCI code word which is sent to the UE and the NodeB according to N, wherein the TFCI is 0, 1.
If the CTFC parameters sent by the RNC contain the CTFC corresponding to Empty TFC and 1 CTFC is additionally added, the CTFC must be used as the first sending, and TFCI code word sent to the UE and the Node B is calculated according to N +1, wherein TFCI is 0, 1.. N;
if the CTFC parameter sent by the RNC does not contain the CTFC corresponding to Empty TFC, then: the RNC must additionally add a CTFC parameter as the first CTFC to transmit, the number of the transmitted CTFC parameters is N, and according to N, the TFCI code word transmitted to the UE and Node B is calculated, where TFCI is 0, 1.
Claims (1)
1. A configuration method of transmission format combination parameter of time division duplex CDMA system is characterized in that the CTFC parameter of the transmission format combination sent to node B and user terminal by radio network controller RNC is the same with the sequence, the TFCI word length of the transmission format combination indication configured to node B and user terminal is the same, after receiving the calculated transmission format combination parameter, node B processes the parameter by the mode completely consistent with the parameter processed by user terminal or the mode completely consistent with the parameter processed by node B by user terminal;
when nodeWhen B processes the parameter in a way completely consistent with the user terminal processing the parameter, the mode of the node B and the user terminal processing and calculating the transmission format combination parameter is as follows: the node B and the user terminal receive the first calculated TFCI parameter of the RNC, which is TFCl, corresponding to TFCI 11The second CTFC parameter corresponds to TFCI 2, i.e., TFCl2The rest are analogized in turn and are marked as { CTFCjIs corresponding to { TFCl }iN, wherein i is 1, 2,. n; at the same time, node B and user terminal use the same principle to increase TFCI to 0, i.e. TFCI0Corresponding transmission format combination configuration is reserved for the physical layer to use when special burst is sent; the configured transmission format combination indicator word length is calculated according to the number of CTFC actually sent by the RNC plus 1, or if the CTFC parameters sent by the RNC to the user terminal and the node B both contain the calculated transmission format combination corresponding to the empty transmission format combination, the TFCI word length is calculated according to the number of the CTFC plus 1, and if the CTFC parameters sent by the RNC to the user terminal and the node B do not contain the calculated transmission format combination corresponding to the empty transmission format combination, the TFCI word length is calculated according to the number of the CTFC plus 1;
when the user terminal processes the parameter in a manner completely consistent with the processing of the parameter by the node B, the manner of processing and calculating the transmission format combination parameter by the node B and the user terminal is as follows: the node B and the user terminal receive the first calculated TFCI parameter of the RNC, which corresponds to TFCI 00The second CTFC parameter corresponds to TFCI 1, i.e., TFCl1The rest are analogized in turn and are marked as { CTFCiN, corresponding to { TFCl } (i ═ 1, 2.. times.n)iN-1 (i ═ 0, 1, 2.); the first calculated TFCI parameter transmitted by the RNC, i.e. corresponding to TFCI0The node B and the user terminal are configured by adopting the same principle and reserved for the physical layer to send special burst; the configured transport format combination indicator word length is calculated according to the number of CTFCs actually sent by the RNC, or if the RNC additionally adds 1 CTFC for the CTFC covered by the physical layer and containing empty transport format combinations, the configured transport format combination indicator word length is calculated according to the number of the CTFCs added with 1, for exampleIf the RNC additionally adds 1 CTFC for being covered by the physical layer and does not contain the CTFC corresponding to the empty transport format combination, the calculation is performed according to the number of CTFCs, and if the RNC does not additionally add the CTFC for being covered by the physical layer, the first CTFC sent to the node B by the RNC must be the CTFC corresponding to the empty transport format combination, and the calculation is performed according to the number of CTFCs.
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CN1437340A (en) * | 2002-02-06 | 2003-08-20 | 华为技术有限公司 | Mapping method from the calculated value of transmission format combination to the indication of transmission format combination |
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