CN102271412A - 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 present wireless communication technology, generally can use multi-input/output antenna (MIMO) technology and user's transmitting data stream.At this moment, institute's data flow transmitted can be that single data flow (is the single current transfer of data in the transmission channel, can abbreviate the single current ability as), a plurality of data flow that also can be parallel transmission (are the multi-stream data transmission, can abbreviate multiple stream capacity as), and when institute's data flow transmitted is 2 data flow of parallel transmission, then can be described as double-current transfer of data, can abbreviate double-current ability as.Wherein, a plurality of data flow of being transmitted in the transmission channel can be to distribute to same user's data stream, also can be to distribute to a plurality of user's data streams.
For example, in the prior art, MIMO technology commonly used is single user's multiple-input and multiple-output (SU-MIMO, Single-User Multiple Input Multiple Output) technology.When using SU-MIMO system (promptly using the system of SU-MIMO technology) when subscriber equipment (UE) sends data flow, the data flow of parallel transmission is to distribute to same user's data stream in the transmission channel.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 fluid data transfer mode.
Wherein, described SU-MIMO single current data transfer mode comprises: network side uses 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) sign indicating number has only a mapping sublist in the mapping table of Walsh (Walsh) sign indicating number, as shown in Figure 1.
And described SU-MIMO double fluid data transfer mode comprises: network side will use first kind of special acquiescence (special default) pilot tone mapping mode and carry out double-current transfer of data 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 first kind of special default pilot tone mapping mode is: the Midamble sign indicating number is split as 2 mapping sublist W1 and W2 to the mapping table of Walsh sign indicating number.Fig. 2 is the mapping table schematic diagram of first kind of specialdefault pilot tone mapping mode in the prior art, and after the fractionation 2 mapping sublist W1 and W2 are as shown in Figure 2.Concrete fractionation mode can not repeat them here with reference to related protocol of the prior art.
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 (promptly 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 sign indicating number by code word, and each data flow all is assigned unique channel estimating code (Midamble shift), so the MU-MIMO system can walk abreast and sends single data flow or two parallel transmission data flow respectively to a plurality of users.So the MU-MIMO system had both supported the single current transfer of data, support the multi-stream data transmission again; And the individual traffic that is transmitted in the transmission channel or a plurality of data flow can be to distribute to one or more user's data streams.
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 use second kind of 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 second kind of special default pilot tone mapping mode is: the Midamble sign indicating number is split as 4 mappings sublist: M1, M2, M3 and M4 to the mapping table of Walsh sign indicating number.Fig. 3 is the mapping table schematic diagram of second kind of special default pilot tone mapping mode in the prior art, and 4 mapping sublist M1, M2, M3 and M4 after the fractionation are respectively as shown in Figure 3.Concrete fractionation mode can not repeat them here with reference to related protocol of the prior art.
In the prior art, have various types of UE, and dissimilar UE may support different abilities.Therefore, in existing variety of protocol, generally will use corresponding data transfer mode to transmit data according to the ability (i.e. the system that this UE supported) that UE reports to UE.Therefore, in the prior art, need use three kinds of above-mentioned data transfer modes to carry out transfer of data respectively according to different system and different pieces of information transmission means that UE supported.For example, when UE supports SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer mode and MU-MIMO single current data transfer mode simultaneously, needs be changed between above-mentioned three kinds of data transfer modes continually, thereby have increased the processing complexity of network side and terminal greatly.In addition, in the prior art, only defined MU-MIMO single current data transfer mode, but also determine in the MU-MIMO system multi-stream data transmission (comprising double-current transfer of data) the data transfer mode that should use, thereby the data transmission procedure in the actual application environment has been caused 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 UE be uniformly scheduled, and the double-current data transfer mode in the definite MU-MIMO system according to the ability level that UE reports.
For achieving the above object, the technical scheme among the present invention is achieved in that
A kind of data transmission method of supporting multiuser mimo system, this method comprises:
A kind of data transmission method of supporting multiuser mimo system, this method comprises:
A, network side are determined the data transfer mode that described UE supports according to the UE ability level that user equipment (UE) reported;
Wherein, the data transfer mode that described UE supported comprises: single user's multiple-input and multiple-output SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer mode, multi-user's multiple-input and multiple-output MU-MIMO single current data transfer mode and MU-MIMO double fluid data transfer mode;
B, network side are the data transfer mode that described UE disposed according to data transfer mode and the network side that described UE supported, use predefined pilot tone mapping mode and control channel form to described UE transmission data.
Described steps A comprises:
The UE ability level that reports as UE be numbered a1, a2 or a3 the time, network side determines respectively that then this UE supports SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer 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 that reports as UE be numbered a2 and a3 the time, then network side determines that this UE supports MU-MIMO double fluid data transfer mode; Wherein, described a2 and a3 are predetermined value.
Described steps A comprises:
The numbering that is the UE ability level is in advance set a new value a4, is used to represent that this UE supports MU-MIMO double fluid data transfer mode;
The UE ability level that reports as UE be numbered default a4 the time, then network side determines that this UE supports MU-MIMO double fluid data transfer mode.
Described step B comprises:
When UE only supports MU-MIMO single current data transfer mode, or when UE support SU-MIMO double fluid data transfer 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 fluid data transfer mode, and when network side was described UE configuration single current data transfer mode, network side used MU-MIMO single current data transfer mode to transmit data to UE;
When UE supports SU-MIMO double fluid data transfer mode and MU-MIMO single current data transfer mode, and network side is that described UE is when disposing double-current data transfer mode, perhaps, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double fluid data transfer mode, and network side is described UE when disposing double-current data transfer mode, and network side uses predefined MU-MIMO double fluid data transfer 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 when being described UE configuration single current data transfer mode, and network side uses MU-MIMO single current data transfer mode to transmit data to UE;
When UE supports MU-MIMO double fluid data transfer mode or SU-MIMO double fluid data transfer mode and MU-MIMO double fluid data transfer mode, and network side is described UE when disposing double-current data transfer mode, and network side uses predefined MU-MIMO double fluid data transfer mode to transmit data to UE.
Described network side uses MU-MIMO single current data transfer mode to draw together to the UE transmits data packets:
Network side uses second kind of 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,
Described second kind of special acquiescence pilot tone mapping mode is: training sequence code is split as 4 mapping sublists to the mapping table of walsh code;
The described control channel form of the 8th class HS-SCCH in the SU-MIMO system that uses comprises to UE transmission HS-DSCH schedule information:
By the length in the control channel form of the 8th class HS-SCCH is the value of " field mark 2 " field of 1, indicates 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 is the value of " specific information " field of 2bit, indicates employed channel estimating code of this UE or channel estimating code index.
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, represent that this UE supports MU-MIMO single current data transfer mode; Otherwise, represent that this UE does not support MU-MIMO single current data transfer mode.
Described network side uses predefined MU-MIMO double fluid data transfer mode to draw together to the UE transmits data packets:
Network side uses 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 tone mapping mode is: training sequence code is split as 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 the natural number greater than 1;
The described control channel form of the 9th class HS-SCCH in the SU-MIMO system that uses comprises to UE transmission HS-DSCH schedule information:
By original length in the control channel form of the 9th class HS-SCCH is the preset value of " channel code collection information " field of 4, indicates this UE whether to support MU-MIMO double fluid data transfer mode;
By the length in the control channel form of the 9th class HS-SCCH is that 2 transport block size information is represented to flow in preceding 3 positions of " stream 2 transport block size information " field of 6; The value of the 4th position by described " stream 2 transport block size information " field is indicated the employed sublist group of this UE; The value of the 5th and 6 position by described " stream 2 transport block size information " field, indicating channel sign indicating number 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 fluid data transfer mode to comprise:
When the value of described " channel code collection information " field is " 1110 ", represent that then this UE supports MU-MIMO double fluid data transfer mode.
The value of described the 5th and 6 position by described " stream 2 transport block size information " field, indicating channel sign indicating number collection information comprises:
Use described " stream 2 transport block size information " the 5th position of field and the value of the 6th position to represent initial code Taoist monastic name and stop code Taoist monastic name in the channel code collection information respectively.
In summary, provide a kind of data transmission method of supporting multiuser mimo system among the present invention.In the data transmission method of described support multiuser mimo system, network side will be determined the data transfer mode that described UE supports according to the UE ability level that UE reported; And network side will be the data transfer mode that described UE disposed according to data transfer mode and the network side that described UE supported also, use predefined pilot tone mapping mode and control channel form to described UE transmission data, thereby can UE be uniformly scheduled, and the multi-stream data transmission means in the definite MU-MIMO system according to the ability level that UE reports.
Description of drawings
Fig. 1 is the mapping table schematic diagram of default pilot tone mapping mode in the prior art.
Fig. 2 is the mapping table schematic diagram of first kind of special default pilot tone mapping mode in the prior art.
Fig. 3 is the mapping table schematic diagram of second kind of special default pilot tone mapping mode in the prior art.
Fig. 4 is for supporting the flow chart of the data transmission method of MU-MIMO system among 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 is for supporting the data transmission method flow chart of MU-MIMO system among the present invention.As shown in Figure 1, support among the present invention that the data transmission method of MU-MIMO system comprises step as described below:
Step 101, network side are determined the data transfer mode that this UE supports according to the UE ability level that UE reported.
In this step, each UE all can report its UE ability level to network side, and therefore, network side then can be determined the data transfer mode that this UE supports according to the UE ability level that UE reported.Wherein, the data transfer mode that described UE supported comprises: SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer mode, MU-MIMO single current data transfer mode and MU-MIMO double fluid data transfer mode.
Specifically, according to prior protocols as can be known, 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 is supported, for example, when the numbering of UE ability level is respectively a1, a2 or a3, represent respectively that then this UE supports SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer 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 not repeat them here with reference to existing related protocol.And in an embodiment of the present invention, network side also not only can be according to the UE ability level that UE reported, determine whether this UE supports SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer mode and/or MU-MIMO single current data transfer mode, also can determine whether this UE supports MU-MIMO double fluid data transfer mode according to the UE ability level that UE reported.
Below will illustrate how to determine the data transfer mode that this UE supported by way of example according to the UE ability level that UE reported, 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 then this UE supports SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer mode or MU-MIMO single current data transfer mode.
Wherein, when UE supported SU-MIMO double fluid data transfer 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, then network side determines that this UE supports MU-MIMO double fluid data transfer mode.
Specifically, when the UE ability level that reports as UE is a2, represent that then this UE supports SU-MIMO double fluid data transfer mode, promptly this UE can support double-current data transfer mode; And the UE ability level that reports as UE represents that then this UE supports MU-MIMO single current data transfer mode when being a3, and promptly this UE can support the MU-MIMO system.Therefore, when UE reported the numbering a2 of two UE ability level and a3 simultaneously, then this UE had both supported SU-MIMO double fluid data transfer mode, also supported MU-MIMO single current data transfer mode; At this moment, this UE also must support MU-MIMO double fluid data transfer mode, so network side can determine that this UE supports MU-MIMO double fluid data transfer mode.
Example 3, the UE ability level that reports as UE be numbered default a4 the time, then network side determines that this UE supports MU-MIMO double fluid data transfer mode.
In an embodiment of the present invention, can expand the numbering of UE ability level in advance, promptly be that the numbering of UE ability level is set a new value a4 in advance, is used to represent that this UE can support MU-MIMO double fluid data transfer mode.Therefore, the UE ability level that reports as UE be numbered default a4 the time, then network side determines that this UE supports MU-MIMO double fluid data transfer mode.
Network side is determined the data transfer mode that this UE supports according to the UE ability level that UE reported.
Step 102, network side is the data transfer mode that described UE disposed according to data transfer mode and the network side that described UE supported, uses predefined pilot tone mapping mode and control channel form to described UE transmission data.
Specifically, in this step, network side can be that described UE disposes corresponding data transfer mode according to the data transfer mode that UE supported, and then according to data transfer mode that UE supported and be the data transfer mode of UE configuration, use various predefined pilot tone mapping modes and control channel form to described UE transmission data.Below will illustrate accordingly the transfer of data under the various different situations by way of example:
Embodiment one,
When UE only supported MU-MIMO single current data transfer mode, network side 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 double-current data transfer mode, so network side can only be described UE configuration single current data transfer mode.At this moment, network side will use MU-MIMO single current data transfer mode to transmit data to UE.
Wherein, described network side uses MU-MIMO single current data transfer mode to draw together to the UE transmits data packets: network side will use second kind of 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 second kind of special default pilot tone mapping mode is: the Midamble sign indicating number is split as 4 mapping sublists to the mapping table of Walsh sign indicating number.Concrete fractionation mode can not repeat them here with reference to related protocol of the prior art.
In the case, can or keep the 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 the above-mentioned use SU-MIMO system sends the HS-DSCH schedule information to UE and can comprise:
1) by the length in the control channel form of the 8th class HS-SCCH is " 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, represent that this UE supports MU-MIMO single current data transfer mode; Otherwise, represent 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, indicate employed channel estimating code of this UE or channel estimating code index.
Specifically, because the length of " specific information " field is 2bit, therefore 4 kinds of possibility values are arranged, therefore, can be with above-mentioned 4 kinds possible values one by one corresponding to 4 sublists of Midamble sign indicating number in the mapping table of Walsh sign indicating number, thereby can learn employed according to the value of " specific information " field be which sublist in 4 sublists, thereby can know employed channel estimating code of this UE or channel estimating code index by inference.
Embodiment two,
When UE supports SU-MIMO double fluid data transfer 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 fluid data transfer mode, and when network side was described UE configuration single current data transfer mode, network side used MU-MIMO single current data transfer mode to transmit data to UE.
Specifically, when UE supported SU-MIMO double fluid data transfer mode and MU-MIMO single current data transfer mode, this UE had both supported double-current data transfer mode, also supported the MU-MIMO system, so the inevitable MU-MIMO double fluid data transfer mode of also supporting of this UE.At this moment, network side both can be this UE configuration single current data transfer mode, also can be this UE and disposed double-current data transfer mode.And when network side is described UE configuration single current data transfer mode, network side will use 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 fluid data transfer mode, and network side is when being described UE configuration single current data transfer mode, and network side also will use MU-MIMO single current data transfer mode to transmit data to UE.Described MU-MIMO single current data transfer mode is identical with MU-MIMO single current data transfer mode among the embodiment one, does not repeat them here.
Embodiment three,
When UE supports SU-MIMO double fluid data transfer mode and MU-MIMO single current data transfer mode, and network side is that described UE is when disposing double-current data transfer mode, perhaps, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double fluid data transfer mode, and network side is described UE when disposing double-current data transfer mode, and network side uses predefined MU-MIMO double fluid data transfer mode to transmit data to UE.
Specifically, when UE supports SU-MIMO double fluid data transfer mode and MU-MIMO single current data transfer mode, the inevitable MU-MIMO double fluid data transfer mode of also supporting of this UE; At this moment, network side both can be this UE configuration single current data transfer mode, also can be this UE and disposed double-current data transfer mode.And when network side be described UE when disposing double-current data transfer mode, network side will use predefined MU-MIMO double fluid 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 fluid data transfer mode, and network side is described UE when disposing double-current data transfer mode, and network side also can use predefined MU-MIMO double fluid data transfer mode to transmit data to UE.
Wherein, described network side uses predefined MU-MIMO double fluid data transfer mode to draw together to the UE transmits data packets: network side uses 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 sign indicating number is split as 4 mappings sublist: M1, M2, M3 and M4 to the mapping table of Walsh sign indicating number, and with described 4 the mapping sublists on average be divided into N sublist group, wherein, N is natural number and N＞1.For example, when N is 2, can be 2 sublist groups with 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 first sublist group, and M3 and M4 are divided into second sublist group; Perhaps, M1 and M3 are divided into first sublist group, M2 and M4 are divided into second sublist group; Or the like.In addition, above-mentioned with mapping table be split as 4 the mapping sublists the fractionation modes can not repeat them here with reference to related protocol of the prior art.
In the case, can or keep the 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 the above-mentioned use SU-MIMO system sends the HS-DSCH schedule information to UE and can comprise:
1) by original length in the control channel form of the 9th class HS-SCCH is " 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 fluid data transfer mode.
Specifically, because in all possible values of " channel code collection information " field, only defined the meaning of part value, for example, defined the meaning of the value of all " value of preceding 2 bit among 4 bit is greater than the values of back 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 fluid data transfer mode.For example, when the value of " channel code collection information " field is " 1110 ", represent that then this UE supports MU-MIMO double fluid data transfer mode.
2) be that preceding 3 bit of " stream 2 transport block size information " field of 6bit represent to flow 2 transport block size information by the length in the control channel form of the 9th class HS-SCCH; The value of the 4th bit by described " stream 2 transport block size information " field is indicated the employed sublist group of this UE; The value of the 5th and 6 bit by described " stream 2 transport block size information " field, indicating channel sign indicating number collection information.
Specifically, owing to only need to use 3 bit can represent 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 scheduling information.Therefore, the 4th bit of described " transport block size information of stream 2 " field can be referred to as Midamble sublist group indicating bit, and indicate 2 above-mentioned sublist groups respectively with 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 fluid data transfer 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 is indicated original channel code collection information.For example, the 5th bit and the 6th bit that establishes above-mentioned " stream 2 transport block size information " field is respectively x
Ccs, 01And x
Ccs, 02, initial code Taoist monastic name and stop code Taoist monastic name in the channel code collection information are respectively k
StartAnd k
Stop, then can use x
Ccs, 01Value represent k
Start, and can use x
Ccs, 02Value represent k
StopThereby, indicate original channel code collection information.For example, can form mapping relations shown in following table 1 or table 2:
| k start | x ccs，01 | k stop | x ccs，02 | Distribute |
| 1 | 0 | 8 | 0 | Preceding 8 SF=16 |
| 1 | 0 | 16 | 1 | 16 SF=16 |
| 8 | 1 | 16 | 0 | 8 the SF=16 code channels in back |
| 16 | 1 | 16 | 1 | SF＝1 |
Table 1
| k start | x ccs，01 | k stop | x ccs，02 | Distribute |
| 1 | 0 | 8 | 0 | Preceding 8 SF=16 |
| 1 | 0 | 16 | 1 | 16 SF=16 |
| 8 | 1 | 16 | 0 | SF＝1 |
| 16 | 1 | 16 | 1 | 8 the SF=16 code channels in back |
Table 2
In addition, in an embodiment of the present invention, if UE only supports SU-MIMO system (promptly only supporting SU-MIMO single current data transfer mode and SU-MIMO single current data transfer mode), and when not supporting MU-MIMO system (promptly not supporting MU-MIMO single current data transfer mode and MU-MIMO single current data transfer mode), can still use in the prior art original data transfer mode to transmit data to UE.
Embodiment four,
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 used MU-MIMO single current data transfer mode to transmit data to UE.
When UE supports MU-MIMO double fluid data transfer mode, perhaps support SU-MIMO double fluid data transfer mode and MU-MIMO double fluid data transfer mode, and network side is described UE when disposing double-current data transfer mode, and network side uses predefined MU-MIMO double fluid data transfer mode to transmit data to UE.
Specifically, 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, network side all uses MU-MIMO single current data transfer mode to transmit data to UE.Described MU-MIMO single current data transfer mode is identical with MU-MIMO single current data transfer mode among the embodiment one, does not repeat them here.
When UE support MU-MIMO double fluid data transfer mode, when perhaps supporting SU-MIMO double fluid data transfer mode and MU-MIMO double fluid data transfer mode, network side all uses predefined MU-MIMO double fluid data transfer mode to transmit data to UE.Described predefined MU-MIMO double fluid data transfer mode is identical with the double-current data transfer mode of the MU-MIMO among the embodiment three, 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, because network side can be determined the data transfer mode that described UE supports according to the UE ability level that UE reported; And network side can be the data transfer mode that described UE disposed according to data transfer mode and the network side that described UE supported also, use predefined pilot tone mapping mode and control channel form to described UE transmission data, thereby realized UE being uniformly scheduled according to the ability level that UE reports, simultaneously, also determine the multi-stream data transmission means in the MU-MIMO system in an embodiment of the present invention, thereby made UE can support the multi-stream data transmission in the MU-MIMO system.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a data transmission method of supporting multiuser mimo system is characterized in that, this method comprises:
A, network side are determined the data transfer mode that described UE supports according to the UE ability level that user equipment (UE) reported;
Wherein, the data transfer mode that described UE supported comprises: single user's multiple-input and multiple-output SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer mode, multi-user's multiple-input and multiple-output MU-MIMO single current data transfer mode and MU-MIMO double fluid data transfer mode;
B, network side are the data transfer mode that described UE disposed according to data transfer mode and the network side that described UE supported, use predefined pilot tone mapping mode and control channel form to described UE transmission data.
2. method according to claim 1 is characterized in that, described steps A comprises:
The UE ability level that reports as UE be numbered a1, a2 or a3 the time, network side determines respectively that then this UE supports SU-MIMO single current data transfer mode, SU-MIMO double fluid data transfer 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 that reports as UE be numbered a2 and a3 the time, then network side determines that this UE supports MU-MIMO double fluid data transfer 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 the UE ability level is in advance set a new value a4, is used to represent that this UE supports MU-MIMO double fluid data transfer mode;
The UE ability level that reports as UE be numbered default a4 the time, then network side determines that this UE supports MU-MIMO double fluid data transfer mode.
5. method according to claim 1 is characterized in that, described step B comprises:
When UE only supports MU-MIMO single current data transfer mode, or when UE support SU-MIMO double fluid data transfer 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 fluid data transfer mode, and when network side was described UE configuration single current data transfer mode, network side used MU-MIMO single current data transfer mode to transmit data to UE;
When UE supports SU-MIMO double fluid data transfer mode and MU-MIMO single current data transfer mode, and network side is that described UE is when disposing double-current data transfer mode, perhaps, when UE supports SU-MIMO single current data transfer mode and MU-MIMO double fluid data transfer mode, and network side is described UE when disposing double-current data transfer mode, and network side uses predefined MU-MIMO double fluid data transfer mode to transmit data to UE.
6. method according to claim 1 is characterized in that, 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 when being described UE configuration single current data transfer mode, and network side uses MU-MIMO single current data transfer mode to transmit data to UE;
When UE supports MU-MIMO double fluid data transfer mode or SU-MIMO double fluid data transfer mode and MU-MIMO double fluid data transfer mode, and network side is described UE when disposing double-current data transfer mode, and network side uses predefined MU-MIMO double fluid data transfer mode to transmit data to UE.
7. according to claim 5 or 6 described methods, it is characterized in that described network side uses MU-MIMO single current data transfer mode to draw together to the UE transmits data packets:
Network side uses second kind of 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,
Described second kind of special acquiescence pilot tone mapping mode is: training sequence code is split as 4 mapping sublists to the mapping table of walsh code;
The described control channel form of the 8th class HS-SCCH in the SU-MIMO system that uses comprises to UE transmission HS-DSCH schedule information:
By the length in the control channel form of the 8th class HS-SCCH is the value of " field mark 2 " field of 1, indicates 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 is the value of " specific information " field of 2bit, indicates employed channel estimating code of this UE or channel estimating code index.
8. method according to claim 7 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, represent that this UE supports MU-MIMO single current data transfer mode; Otherwise, represent that this UE does not support MU-MIMO single current data transfer mode.
9. according to claim 5 or 6 described methods, it is characterized in that described network side uses predefined MU-MIMO double fluid data transfer mode to draw together to the UE transmits data packets:
Network side uses 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 tone mapping mode is: training sequence code is split as 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 the natural number greater than 1;
The described control channel form of the 9th class HS-SCCH in the SU-MIMO system that uses comprises to UE transmission HS-DSCH schedule information:
By original length in the control channel form of the 9th class HS-SCCH is the preset value of " channel code collection information " field of 4, indicates this UE whether to support MU-MIMO double fluid data transfer mode;
By the length in the control channel form of the 9th class HS-SCCH is that 2 transport block size information is represented to flow in preceding 3 positions of " stream 2 transport block size information " field of 6; The value of the 4th position by described " stream 2 transport block size information " field is indicated the employed sublist group of this UE; The value of the 5th and 6 position by described " stream 2 transport block size information " field, indicating channel sign indicating number collection information.
10. method according to claim 9, 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 fluid data transfer mode to comprise:
When the value of described " channel code collection information " field is " 1110 ", represent that then this UE supports MU-MIMO double fluid data transfer mode.
11. method according to claim 9 is characterized in that, the value of described the 5th and 6 position by described " stream 2 transport block size information " field, and indicating channel sign indicating number collection information comprises:
Use described " stream 2 transport block size information " the 5th position of field and the value of the 6th position to represent initial code Taoist monastic name and stop code Taoist monastic name in the channel code collection information respectively.
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