CN102271412B - Data transmission method supporting multi-user multi-input/multi-output (MU-MIMO) system - Google Patents
Data transmission method supporting multi-user multi-input/multi-output (MU-MIMO) system Download PDFInfo
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Abstract
The invention discloses a data transmission method supporting a multi-user multi-input/multi-output (MU-MIMO) system. The method comprises the following steps: a network side determines data transmission manners supported by UE according to UE capability levels reported by all the UE, wherein the data transmission manners supported by all the UE comprise an SU-MIMO (Single-User Multi-Input/Multi-Output) single-stream data transmission manner, an SU-MIMO dual-stream data transmission manner, an MU-MIMO single-stream data transmission manner and an MU-MIMO dual-stream data transmission manner; and the network side transmits data to all the UE by using preset pilot frequency mapping manners and control channel formats according to the data transmission manners supported by all the UE and data transmission manners configured for all the UE by the network side. With the adoption of the method, all the UE can be generally scheduled and multi-stream data transmission manners in the MU-MIMO system can be determined according to the capability levels reported by all the UE.
Description
Technical field
The present invention relates to wireless communication technology field, refer in particular to the data transmission method of a kind of support multi-user multiple-input and multiple-output (MU-MIMO, Multi-User Multiple Input Multiple Output) system.
Background technology
In current wireless communication technology, generally can use multi-input/output antenna (MIMO) technology and user's transmitting data stream.Now, the data flow of transmitting in transmission channel can be that single data flow (is the single current transfer of data, can be referred to as the single current ability), a plurality of data flow that can be also parallel transmission (are the multi-stream data transmission, can be referred to as multiple stream capacity), and when working as the data flow of transmitting and being 2 data flow of parallel transmission, can be described as double-flow data transmission, can be referred to as double-current ability.Wherein, a plurality of data flow of transmitting in transmission channel can be to distribute to same user's data flow, can be also the data flow of distributing to a plurality of users.
For example, in the prior art, MIMO technology commonly used is alone family multiple-input and multiple-output (SU-MIMO, Single-User Multiple Input Multiple Output) technology.When using SU-MIMO system (namely using the system of SU-MIMO technology) to send data flow to subscriber equipment (UE), in transmission channel, the data flow of parallel transmission is to distribute to same user's data flow.Therefore, in TD SDMA (TD-SCDMA) agreement, two kinds of SU-MIMO transmission meanss have been defined: SU-MIMO single current data transfer mode and SU-MIMO double-flow data transmission mode.
Wherein, described SU-MIMO single current data transfer mode comprises: network side is used acquiescence (default) pilot tone mapping mode and carries out the single current transfer of data by high speed descending sharing channel (HS-DSCH), and uses the control channel form of the 1st, 4 or 8 class high speed descending sharing channel shared control channels (HS-SCCH) to send the HS-DSCH schedule information to UE; Wherein, in described default pilot tone mapping mode, training sequence (Midamble) code only has a mapping sublist in the mapping table of Walsh (Walsh) code, as shown in Figure 1.
And described SU-MIMO double-flow data transmission mode comprises: network side will be used the special acquiescence of the first (special default) pilot tone mapping mode and carry out double-flow data transmission by HS-DSCH, and use the control channel form of the 9th class HS-SCCH to send the HS-DSCH schedule information to UE; Wherein, described the first special default pilot tone mapping mode is: the Midamble code is split as to 2 mapping sublist W1 and W2 to the mapping table of Walsh code.Fig. 2 is the mapping table schematic diagram of the first specialdefault pilot tone mapping mode in prior art, and after fractionation 2 mapping sublist W1 and W2 are as shown in Figure 2.Concrete fractionation mode can, with reference to related protocol of the prior art, not repeat them here.
In addition, in existing wireless communication technology, also introduced a kind of multi-user's multiple-input and multiple-output (MU-MIMO) technology.In MU-MIMO system (namely using the system of MU-MIMO technology), can reuse or the data flow of a plurality of use same spread of space division multiplexing mode parallel transmission code by code word, and each data flow is assigned unique channel estimating code (Midamble shift), so the MU-MIMO system can walk abreast and sends respectively single data flow or two parallel transmission data flow to a plurality of users.So the MU-MIMO system had both been supported the single current transfer of data, support again the multi-stream data transmission; And the individual traffic transmitted in transmission channel or a plurality of data flow can be to distribute to one or more users' data flow.
In order to use the MU-MIMO technology, in the TD-SCDMA agreement, also defined a kind of MU-MIMO transmission means, i.e. MU-MIMO single current data transfer mode.Described MU-MIMO single current data transfer mode comprises: network side will be used the second special default pilot tone mapping mode and carry out the single current transfer of data by HS-DSCH, and use the control channel form of the 8th class HS-SCCH in the SU-MIMO system to send the HS-DSCH schedule information to UE; Wherein, described the second special default pilot tone mapping mode is: the Midamble code is split as to 4 mappings sublist: M1, M2, M3 and M4 to the mapping table of Walsh code.Fig. 3 is the mapping table schematic diagram of the second special default pilot tone mapping mode in prior art, and 4 mapping sublist M1, M2, M3 and M4 after fractionation are respectively as shown in Figure 3.Concrete fractionation mode can, with reference to related protocol of the prior art, not repeat them here.
In the prior art, have various types of UE, and dissimilar UE may support different abilities.Therefore, in existing variety of protocol, the ability that generally will report according to UE (i.e. this UE support system) is used corresponding data transfer mode to transmit data to UE.Therefore, in the prior art, need to use respectively three kinds of above-mentioned data transfer modes to carry out transfer of data according to different system and different pieces of information transmission means that UE supports.For example, when UE supports SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode simultaneously, needs be changed continually between above-mentioned three kinds of data transfer modes, thereby have greatly increased the processing complexity of network side and terminal.In addition, in the prior art, only defined MU-MIMO single current data transfer mode, but also do not determine the data transfer mode that the multi-stream data transmission (comprising double-flow data transmission) in the MU-MIMO system should be used, thereby the data transmission procedure in actual application environment has been caused to adverse influence.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of data transmission method of supporting multiuser mimo system, thereby can be uniformly scheduled to UE according to the ability level that UE reports, and the double-flow data transmission mode in definite MU-MIMO system.
For achieving the above object, the technical scheme in the present invention is achieved in that
A kind of data transmission method of supporting multiuser mimo system, the method comprises:
A kind of data transmission method of supporting multiuser mimo system, the method comprises:
A, network side, according to the UE ability level that user equipment (UE) reports, are determined the data transfer mode that described UE supports;
Wherein, the data transfer mode supported of described UE comprises: alone family multiple-input and multiple-output SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode, multi-user's multiple-input and multiple-output MU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode;
B, network side are the data transfer mode that described UE configures according to data transfer mode and network side that described UE supports, use predefined pilot tone mapping mode and control channel form to described UE transmission data.
Described steps A comprises:
The UE ability level reported as UE be numbered a1, a2 or a3 the time, network side determines respectively that this UE supports SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode or MU-MIMO single current data transfer mode; Wherein, described a1, a2 and a3 are predetermined value.
Described steps A comprises:
The UE ability level reported as UE be numbered a2 and a3 the time, network side determines that this UE supports MU-MIMO double-flow data transmission mode; Wherein, described a2 and a3 are predetermined value.
Described steps A comprises:
The numbering that is in advance the UE ability level is set a new value a4, supports MU-MIMO double-flow data transmission mode be used to meaning this UE;
The UE ability level reported as UE be numbered default a4 the time, network side determines that this UE supports MU-MIMO double-flow data transmission mode.
Described step B comprises:
When UE only supports MU-MIMO single current data transfer mode, or when UE support SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode, and when network side is described UE configuration single current data transfer mode, or when UE support SU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration single current data transfer mode, network side was used MU-MIMO single current data transfer mode to transmit data to UE;
When UE supports SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode, and when network side is described UE configuration double-flow data transmission mode, perhaps, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration double-flow data transmission mode, network side was used predefined MU-MIMO double-flow data transmission mode to transmit data to UE.
Described step B comprises:
When UE supports SU-MIMO single current data transfer mode and MU-MIMO single current data transfer mode, and network side is while being described UE configuration single current data transfer mode, and network side is used MU-MIMO single current data transfer mode to transmit data to UE;
When UE supports MU-MIMO double-flow data transmission mode or SU-MIMO double-flow data transmission mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration double-flow data transmission mode, network side was used predefined MU-MIMO double-flow data transmission mode to transmit data to UE.
Described network side is used MU-MIMO single current data transfer mode to comprise to UE transmission data:
Network side is used the second special acquiescence pilot tone mapping mode and carries out the single current transfer of data by high speed downlink shared channel HS-DSCH, and uses the control channel form of the 8th class high speed descending sharing channel shared control channel HS-SCCH to send the HS-DSCH schedule information to UE; Wherein,
The special acquiescence pilot tone of described the second mapping mode is: training sequence code is split as to 4 mapping sublists to the mapping table of walsh code;
The control channel form of the 8th class HS-SCCH in described use SU-MIMO system sends the HS-DSCH schedule information to UE and comprises:
By the length in the control channel form of the 8th class HS-SCCH, be the value of " field mark 2 " field of 1, indicate this UE whether to support MU-MIMO single current data transfer mode;
By the length in the control channel form of the 8th class HS-SCCH, be the value of " specific information " field of 2bit, channel estimating code or the channel estimating code index of indicating this UE to use.
Whether described is the value of " field mark 2 " field of 1 by the length in the control channel form of the 8th class HS-SCCH, indicate this UE to support MU-MIMO single current data transfer mode to comprise:
When the value of described " field mark 2 " field is 1, mean that this UE supports MU-MIMO single current data transfer mode; Otherwise, mean that this UE does not support MU-MIMO single current data transfer mode.
Described network side is used predefined MU-MIMO double-flow data transmission mode to comprise to UE transmission data:
Network side is used the third special acquiescence pilot tone mapping mode and carries out the single current transfer of data by HS-DSCH, and uses the control channel form of the 9th class HS-SCCH to send the HS-DSCH schedule information to UE; Wherein,
Described the third Special Pilot-aided mapping mode is: training sequence code is split as to 4 mapping sublists to the mapping table of walsh code, and will be described 4 shine upon sublists and on average be divided into N sublist group; Described N is greater than 1 natural number;
The control channel form of the 9th class HS-SCCH in described use SU-MIMO system sends the HS-DSCH schedule information to UE and comprises:
By original length in the control channel form of the 9th class HS-SCCH, be the preset value of " channel code collection information " field of 4, indicate this UE whether to support MU-MIMO double-flow data transmission mode;
By front 3 positions that are " stream 2 transport block size information " field of 6 of the length in the control channel form of the 9th class HS-SCCH, mean to flow 2 transport block size information; The value of the 4th position by described " stream 2 transport block size information " field, the sublist group of indicating this UE to use; The value of the 5th and 6 positions by described " stream 2 transport block size information " field, indicating channel code collection information.
Whether described is the preset value of " channel code collection information " field of 4bit by original length in the control channel form of the 9th class HS-SCCH, indicate this UE to support MU-MIMO double-flow data transmission mode to comprise:
When the value of described " channel code collection information " field is " 1110 ", mean that this UE supports MU-MIMO double-flow data transmission mode.
The value of described the 5th and 6 positions by described " transport block size information of stream 2 " field, indicating channel code collection information comprises:
Use described " transport block size information of stream 2 " the 5th position of field and the value of the 6th position to mean respectively initial code Taoist monastic name and the stop code Taoist monastic name in channel code collection information.
In summary, in the present invention, provide a kind of data transmission method of supporting multiuser mimo system.In the data transmission method of described support multiuser mimo system, the UE ability level that network side will report according to UE, determine the data transfer mode that described UE supports; And data transfer mode and network side that network side also will be supported according to described UE are the data transfer mode that described UE configures, use predefined pilot tone mapping mode and control channel form to described UE transmission data, thereby can be uniformly scheduled to UE according to the ability level that UE reports, and the multi-stream data transmission means in definite MU-MIMO system.
The accompanying drawing explanation
Fig. 1 is the mapping table schematic diagram of default pilot tone mapping mode in prior art.
Fig. 2 is the mapping table schematic diagram of the first special default pilot tone mapping mode in prior art.
Fig. 3 is the mapping table schematic diagram of the second special default pilot tone mapping mode in prior art.
Fig. 4 supports the flow chart of the data transmission method of MU-MIMO system in the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 supports the data transmission method flow chart of MU-MIMO system in the present invention.As shown in Figure 1, in the present invention, support that the data transmission method of MU-MIMO system comprises step as described below:
Step 101, network side, according to the UE ability level that UE reports, is determined the data transfer mode that this UE supports.
In this step, each UE all can report its UE ability level to network side, and therefore, the UE ability level that network side can report according to UE, determine the data transfer mode that this UE supports.Wherein, the data transfer mode supported of described UE comprises: SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode, MU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode.
Specifically, as can be known according to existing agreement, there is relation one to one in the numbering of the described UE ability level value of UE ability level (or be called) with the data transfer mode that UE supports, for example, when the numbering of UE ability level is respectively a1, a2 or a3, mean respectively that this UE supports SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode or MU-MIMO single current data transfer mode.Wherein, above-mentioned a1, a2 and a3 are predetermined value; The concrete value of described a1, a2 and a3 can, with reference to existing related protocol, not repeat them here.And in an embodiment of the present invention, the UE ability level that network side also not only can report according to UE, determine whether this UE supports SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode and/or MU-MIMO single current data transfer mode, also can determine whether this UE supports MU-MIMO double-flow data transmission mode according to the UE ability level that UE reports.
To illustrate by way of example that below the UE ability level how reported according to UE determines the data transfer mode that this UE supports, for example:
Example 1, the UE ability level that reports as UE be numbered a1, a2 or a3 the time, network side determines respectively that this UE supports SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode or MU-MIMO single current data transfer mode.
Wherein, when UE supported SU-MIMO double-flow data transmission mode, this UE also must support SU-MIMO single current data transfer mode.
Example 2, the UE ability level that reports as UE be numbered a2 and a3 the time, network side determines that this UE supports MU-MIMO double-flow data transmission mode.
Specifically, when the UE ability level reported as UE is a2, mean that this UE supports SU-MIMO double-flow data transmission mode, namely this UE can support the double-flow data transmission mode; And the UE ability level reported as UE means that this UE supports MU-MIMO single current data transfer mode while being a3, namely this UE can support the MU-MIMO system.Therefore, when UE reported the numbering a2 of two UE ability level and a3 simultaneously, this UE had both supported SU-MIMO double-flow data transmission mode, also supported MU-MIMO single current data transfer mode; Now, this UE also must support MU-MIMO double-flow data transmission mode, so network side can determine that this UE supports MU-MIMO double-flow data transmission mode.
Example 3, the UE ability level that reports as UE be numbered default a4 the time, network side determines that this UE supports MU-MIMO double-flow data transmission mode.
In an embodiment of the present invention, can to the numbering of UE ability level, expand in advance, be namely that the numbering of UE ability level is set a new value a4 in advance, can support MU-MIMO double-flow data transmission mode be used to meaning this UE.Therefore, the UE ability level reported as UE be numbered default a4 the time, network side determines that this UE supports MU-MIMO double-flow data transmission mode.
Network side, according to the UE ability level that UE reports, is determined the data transfer mode that this UE supports.
Step 102, network side is the data transfer mode that described UE configures according to data transfer mode and network side that described UE supports, uses predefined pilot tone mapping mode and control channel form to described UE transmission data.
Specifically, in this step, the data transfer mode that network side can be supported according to UE is the corresponding data transfer mode of described UE configuration, and then the data transfer mode of supporting according to UE and be the data transfer mode of UE configuration, use various predefined pilot tone mapping modes and control channel form to transmit data to described UE.Below will to the transfer of data under various different situations, illustrate accordingly by way of example:
Embodiment mono-,
When UE only supported MU-MIMO single current data transfer mode, network side was used MU-MIMO single current data transfer mode to transmit data to UE.
Specifically, when UE only supported MU-MIMO single current data transfer mode, because UE does not support the double-flow data transmission mode, so network side can only be described UE configuration single current data transfer mode.Now, network side will be used MU-MIMO single current data transfer mode to transmit data to UE.
Wherein, described network side is used MU-MIMO single current data transfer mode to comprise to UE transmission data: network side will be used the second special default pilot tone mapping mode and carry out the single current transfer of data by HS-DSCH, and use the control channel form of the 8th class HS-SCCH to send the HS-DSCH schedule information to UE; Wherein, described the second special default pilot tone mapping mode is: the Midamble code is split as to 4 mapping sublists to the mapping table of Walsh code.Concrete fractionation mode can, with reference to related protocol of the prior art, not repeat them here.
In the case, can or retain position to some field in the control channel form of the 8th class HS-SCCH expands accordingly, therefore, the control channel form of the 8th class HS-SCCH in above-mentioned use SU-MIMO system can comprise to UE transmission HS-DSCH schedule information:
1) by the length in the control channel form of the 8th class HS-SCCH, be " field mark 2 " field (x of 1 (bit)
Flag2,1) value, indicate this UE whether to support MU-MIMO single current data transfer mode.
For example, work as x
Flag2,1Value be 1 o'clock, mean that this UE supports MU-MIMO single current data transfer mode; Otherwise, mean that this UE does not support MU-MIMO single current data transfer mode.
2) by the length in the control channel form of the 8th class HS-SCCH, be " specific information " field (x of 2bit
Info, 1, x
Info, 2) value, channel estimating code or the channel estimating code index of indicating this UE to use.
Specifically, because the length of " specific information " field is 2bit, therefore 4 kinds of possibility values are arranged, therefore, can be by above-mentioned 4 kinds possible values one by one corresponding to the Midamble code to 4 sublists in the mapping table of Walsh code, thereby can learn that what use is which sublist in 4 sublists according to the value of " specific information " field, thereby can know channel estimating code or channel estimating code index that this UE is used by inference.
Embodiment bis-,
When UE supports SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode, and when network side is described UE configuration single current data transfer mode, perhaps, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration single current data transfer mode, network side was used MU-MIMO single current data transfer mode to transmit data to UE.
Specifically, when UE supported SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode, this UE had both supported the double-flow data transmission mode, also supported the MU-MIMO system, so the inevitable MU-MIMO double-flow data transmission mode of also supporting of this UE.Now, network side both can be this UE configuration single current data transfer mode, also can be this UE configuration double-flow data transmission mode.And when network side is described UE configuration single current data transfer mode, network side will be used MU-MIMO single current data transfer mode to transmit data to UE.In like manner, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode, and network side is while being described UE configuration single current data transfer mode, and network side also will be used MU-MIMO single current data transfer mode to transmit data to UE.Described MU-MIMO single current data transfer mode is identical with the MU-MIMO single current data transfer mode in embodiment mono-, does not repeat them here.
Embodiment tri-,
When UE supports SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode, and when network side is described UE configuration double-flow data transmission mode, perhaps, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration double-flow data transmission mode, network side was used predefined MU-MIMO double-flow data transmission mode to transmit data to UE.
Specifically, when UE supports SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode, the inevitable MU-MIMO double-flow data transmission mode of also supporting of this UE; Now, network side both can be this UE configuration single current data transfer mode, also can be this UE configuration double-flow data transmission mode.And when network side is described UE configuration double-flow data transmission mode, network side will be used predefined MU-MIMO double-flow data transmission mode to transmit data to UE.In like manner, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration double-flow data transmission mode, network side also can be used predefined MU-MIMO double-flow data transmission mode to transmit data to UE.
Wherein, described network side is used predefined MU-MIMO double-flow data transmission mode to comprise to UE transmission data: network side is used the third special default pilot tone mapping mode and carries out the single current transfer of data by HS-DSCH, and uses the control channel form of the 9th class HS-SCCH to send the HS-DSCH schedule information to UE.Wherein, described the third special default pilot tone mapping mode is: the Midamble code is split as to 4 mappings sublist: M1, M2, M3 and M4 to the mapping table of Walsh code, and described 4 mapping sublists on average are divided into to N sublist group, wherein, N is natural number and N>1.For example, when N is 2, can be 2 sublist groups by 4 mapping sub-table division, each sublist group comprises 2 mapping sublists.Wherein, dividing mode can have multiple, for example, M1 and M2 is divided into to first sublist group, and M3 and M4 are divided into to second sublist group; Perhaps, M1 and M3 are divided into to first sublist group, M2 and M4 are divided into to second sublist group; Etc..In addition, above-mentioned by mapping table be split as 4 the mapping sublists the fractionation modes can, with reference to related protocol of the prior art, not repeat them here.
In the case, can or retain position to some field in the control channel form of the 9th class HS-SCCH expands accordingly, therefore, the control channel form of the 9th class HS-SCCH in above-mentioned use SU-MIMO system can comprise to UE transmission HS-DSCH schedule information:
1) by original length in the control channel form of the 9th class HS-SCCH, be " channel code collection information " field (x of 4bit
Ccs, 1, x
Ccs, 2, x
Ccs, 3, x
Ccs, 4) preset value, indicate this UE whether to support MU-MIMO double-flow data transmission mode.
Specifically, in all possible values in " channel code collection information " field, only defined the meaning of part value, for example, defined the meaning of the value of all " value of front 2 bit in 4 bit is greater than the value of rear 2 bit ", and all values are the meaning of 1x0x (for example, 1001).Therefore, can use the undefined value of this " channel code collection information " field, indicate this UE whether to support MU-MIMO double-flow data transmission mode.For example, when the value of " channel code collection information " field is " 1110 ", mean that this UE supports MU-MIMO double-flow data transmission mode.
2) front 3 bit that are " stream 2 transport block size information " field of 6bit by the length in the control channel form of the 9th class HS-SCCH mean to flow 2 transport block size information; The value of the 4th bit by described " stream 2 transport block size information " field, the sublist group of indicating this UE to use; The value of the 5th and 6 bit by described " stream 2 transport block size information " field, indicating channel code collection information.
Specifically, owing to only needing to use 3 bit can mean the transport block size information of original stream 2, therefore, in an embodiment of the present invention, can utilize remaining 3 bit of " transport block size information of stream 2 " field to indicate corresponding schedule information.Therefore, the 4th bit of described " transport block size information of stream 2 " field can be referred to as to Midamble sublist group indicating bit, and indicate respectively 2 above-mentioned sublist groups by 2 kinds of possible values of this Midamble sublist group indicating bit.Because original " channel code collection information " field has been used to indicate this UE whether to support MU-MIMO double-flow data transmission mode, therefore, in an embodiment of the present invention, the value of the 5th, 6 bit that can be by described " stream 2 transport block size information " field, indicate original channel code collection information.For example, the 5th bit and the 6th bit of establishing above-mentioned " stream 2 transport block size information " field are respectively x
Ccs, 01And x
Ccs, 02, initial code Taoist monastic name and stop code Taoist monastic name in channel code collection information are respectively k
StartAnd k
Stop, can use x
Ccs, 01Value mean k
Start, and can use x
Ccs, 02Value mean k
StopThereby, indicate original channel code collection information.For example, can form the mapping relations as shown in following table 1 or table 2:
| k start | x ccs，01 | k stop | x ccs，02 | Distribute |
| 1 | 0 | 8 | 0 | |
| 1 | 0 | 16 | 1 | 16 SF=16 |
| 8 | 1 | 16 | 0 | |
| 16 | 1 | 16 | 1 | SF＝1 |
Table 1
| k start | x ccs，01 | k stop | x ccs，02 | Distribute |
| 1 | 0 | 8 | 0 | |
| 1 | 0 | 16 | 1 | 16 SF=16 |
| 8 | 1 | 16 | 0 | SF＝1 |
| 16 | 1 | 16 | 1 | |
Table 2
In addition, in an embodiment of the present invention, if UE only supports SU-MIMO system (namely only supporting SU-MIMO single current data transfer mode and SU-MIMO single current data transfer mode), and while not supporting MU-MIMO system (namely not supporting MU-MIMO single current data transfer mode and MU-MIMO single current data transfer mode), can still use original data transfer mode in prior art to transmit data to UE.
Embodiment tetra-,
When UE supports MU-MIMO single current data transfer mode, perhaps support SU-MIMO single current data transfer mode and MU-MIMO single current data transfer mode, and when network side was described UE configuration single current data transfer mode, network side was used MU-MIMO single current data transfer mode to transmit data to UE.
When UE supports MU-MIMO double-flow data transmission mode, perhaps support SU-MIMO double-flow data transmission mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration double-flow data transmission mode, network side was used predefined MU-MIMO double-flow data transmission mode to transmit data to UE.
Specifically, when UE supports MU-MIMO single current data transfer mode, or support SU-MIMO single current data transfer mode and MU-MIMO single current data transfer mode, network side is all used MU-MIMO single current data transfer mode to transmit data to UE.Described MU-MIMO single current data transfer mode is identical with the MU-MIMO single current data transfer mode in embodiment mono-, does not repeat them here.
When UE supports MU-MIMO double-flow data transmission mode, or while supporting SU-MIMO double-flow data transmission mode and MU-MIMO double-flow data transmission mode, network side is all used predefined MU-MIMO double-flow data transmission mode to transmit data to UE.Described predefined MU-MIMO double-flow data transmission mode is identical with the MU-MIMO double-flow data transmission mode in embodiment tri-, does not repeat them here.
The data transmission method of above-mentioned support MU-MIMO system has been proposed in summary, in an embodiment of the present invention.In above-mentioned method, due to the UE ability level that network side can report according to UE, determine the data transfer mode that described UE supports; And data transfer mode and network side that network side also can be supported according to described UE are the data transfer mode that described UE configures, use predefined pilot tone mapping mode and control channel form to described UE transmission data, thereby realized according to the ability level that UE reports, UE being uniformly scheduled, simultaneously, also determine in an embodiment of the present invention the multi-stream data transmission means in the MU-MIMO system, thereby made UE can support the multi-stream data transmission in the MU-MIMO system.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a data transmission method of supporting multiuser mimo system, is characterized in that, the method comprises:
A, network side, according to the UE ability level that user equipment (UE) reports, are determined the data transfer mode that described UE supports;
Wherein, the data transfer mode supported of described UE comprises: alone family multiple-input and multiple-output SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode, multi-user's multiple-input and multiple-output MU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode;
B, network side are the data transfer mode that described UE configures according to data transfer mode and network side that described UE supports, use predefined pilot tone mapping mode and control channel form to described UE transmission data;
Wherein, described step B comprises:
When UE only supports MU-MIMO single current data transfer mode, or when UE support SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode, and when network side is described UE configuration single current data transfer mode, or when UE support SU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration single current data transfer mode, network side was used MU-MIMO single current data transfer mode to transmit data to UE;
When UE supports SU-MIMO double-flow data transmission mode and MU-MIMO single current data transfer mode, and when network side is described UE configuration double-flow data transmission mode, perhaps, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration double-flow data transmission mode, network side was used predefined MU-MIMO double-flow data transmission mode to transmit data to UE;
When UE supports SU-MIMO single current data transfer mode and MU-MIMO single current data transfer mode, and network side is while being described UE configuration single current data transfer mode, and network side is used MU-MIMO single current data transfer mode to transmit data to UE;
When UE supports MU-MIMO double-flow data transmission mode or SU-MIMO double-flow data transmission mode and MU-MIMO double-flow data transmission mode, and when network side was described UE configuration double-flow data transmission mode, network side was used predefined MU-MIMO double-flow data transmission mode to transmit data to UE.
2. method according to claim 1, is characterized in that, described steps A comprises:
The UE ability level reported as UE be numbered a1, a2 or a3 the time, network side determines respectively that this UE supports SU-MIMO single current data transfer mode, SU-MIMO double-flow data transmission mode or MU-MIMO single current data transfer mode; Wherein, described a1, a2 and a3 are predetermined value.
3. method according to claim 1 and 2, is characterized in that, described steps A comprises:
The UE ability level reported as UE be numbered a2 and a3 the time, network side determines that this UE supports MU-MIMO double-flow data transmission mode; Wherein, described a2 and a3 are predetermined value.
4. method according to claim 1 and 2, is characterized in that, described steps A comprises:
The numbering that is in advance the UE ability level is set a new value a4, supports MU-MIMO double-flow data transmission mode be used to meaning this UE;
The UE ability level reported as UE be numbered default a4 the time, network side determines that this UE supports MU-MIMO double-flow data transmission mode.
5. method according to claim 1, is characterized in that, described network side is used MU-MIMO single current data transfer mode to comprise to UE transmission data:
Network side is used the second special acquiescence pilot tone mapping mode and carries out the single current transfer of data by high speed downlink shared channel HS-DSCH, and uses the control channel form of the 8th class high speed descending sharing channel shared control channel HS-SCCH to send the HS-DSCH schedule information to UE; Wherein,
The special acquiescence pilot tone of described the second mapping mode is: training sequence code is split as to 4 mapping sublists to the mapping table of walsh code;
The control channel form of the 8th class HS-SCCH in described use SU-MIMO system sends the HS-DSCH schedule information to UE and comprises:
By the length in the control channel form of the 8th class HS-SCCH, be the value of " field mark 2 " field of 1, indicate this UE whether to support MU-MIMO single current data transfer mode;
By the length in the control channel form of the 8th class HS-SCCH, be the value of " specific information " field of 2bit, channel estimating code or the channel estimating code index of indicating this UE to use.
6. method according to claim 5, is characterized in that, whether described is the value of " field mark 2 " field of 1 by the length in the control channel form of the 8th class HS-SCCH, indicate this UE to support MU-MIMO single current data transfer mode to comprise:
When the value of described " field mark 2 " field is 1, mean that this UE supports MU-MIMO single current data transfer mode; Otherwise, mean that this UE does not support MU-MIMO single current data transfer mode.
7. method according to claim 1, is characterized in that, described network side is used predefined MU-MIMO double-flow data transmission mode to comprise to UE transmission data:
Network side is used the third special acquiescence pilot tone mapping mode and carries out the single current transfer of data by HS-DSCH, and uses the control channel form of the 9th class HS-SCCH to send the HS-DSCH schedule information to UE; Wherein,
Described the third Special Pilot-aided mapping mode is: training sequence code is split as to 4 mapping sublists to the mapping table of walsh code, and will be described 4 shine upon sublists and on average be divided into N sublist group; Described N is greater than 1 natural number;
The control channel form of the 9th class HS-SCCH in described use SU-MIMO system sends the HS-DSCH schedule information to UE and comprises:
By original length in the control channel form of the 9th class HS-SCCH, be the preset value of " channel code collection information " field of 4, indicate this UE whether to support MU-MIMO double-flow data transmission mode;
By front 3 positions that are " stream 2 transport block size information " field of 6 of the length in the control channel form of the 9th class HS-SCCH, mean to flow 2 transport block size information; The value of the 4th position by described " stream 2 transport block size information " field, the sublist group of indicating this UE to use; The value of the 5th and 6 positions by described " stream 2 transport block size information " field, indicating channel code collection information.
8. method according to claim 7, it is characterized in that, whether described is the preset value of " channel code collection information " field of 4bit by original length in the control channel form of the 9th class HS-SCCH, indicate this UE to support MU-MIMO double-flow data transmission mode to comprise:
When the value of described " channel code collection information " field is " 1110 ", mean that this UE supports MU-MIMO double-flow data transmission mode.
9. method according to claim 7, is characterized in that, the value of described the 5th and 6 positions by described " transport block size information of stream 2 " field, and indicating channel code collection information comprises:
Use described " transport block size information of stream 2 " the 5th position of field and the value of the 6th position to mean respectively initial code Taoist monastic name and the stop code Taoist monastic name in channel code collection information.
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