CN102571261B - A kind of MCS indicating means of spatial flow and device - Google Patents
A kind of MCS indicating means of spatial flow and device Download PDFInfo
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Abstract
The invention discloses a kind of code modulation mode (MCS) indicating means and device of spatial flow, method comprises: multi-user's multiple-input and multiple-output (MU-MIMO) signal is divided into control information part and load information part, wherein, control information part is divided into common control information part and exclusive control information part, common control information part is used to indicate the public control information of each user, and exclusive control information part is used for indicating control information proprietary separately for each user; By common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt.By the present invention, under the prerequisite ensureing transmission reliability, achieve different spaces stream and different MCS can be adopted to carry out transfer of data, and have that MCS as much as possible is selective carries out transfer of data.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of code modulation mode (MCS, Modulation Coding Scheme) indicating means and device of spatial flow.
Background technology
WLAN (WLAN, Wireless Local Area Networks) is that the employing wireless communication technology is interconnected by computer equipment, forms the network system that can communicate mutually and realize resource-sharing.Institute of Electrical and Electric Engineers (IEEE) 802.11 is one of mainstream technologys of current WLAN (wireless local area network), this agreement mainly defines physical layer (PHY) and media interviews control (MAC, Media Access Control) layer specification.
WLAN experienced by 802.11 to 802.11b and arrives 802.11a/g again, then arrives 802.11n, finally arrives the development course of 802.11ac.Along with user is to the raising of wireless network demand, also more and more higher to the requirement of message transmission rate.
In a typical ultra-high throughput wlan system, for the different spaces stream of single user and multi-user, identical code modulation mode (MCS, Modulation Coding Scheme) is all adopted to send, optional MCS mono-has 10 kinds, as shown in table 1 below:
| MCS | Modulation | Coding Rate |
| 0 | BPSK | 1/2 |
| 1 | QPSK | 1/2 |
| 2 | QPSK | 3/4 |
| 3 | 16QAM | 1/2 |
| 4 | 16QAM | 3/4 |
| 5 | 64QAM | 2/3 |
| 6 | 64QAM | 3/4 |
| 7 | 64QAM | 5/6 |
| 8 | 256QAM | 3/4 |
| 9 | 256QAM | 5/6 |
Table 1
And in practical communication process, the channel quality of different spatial stream transmission is different; Now, if all spatial flows all adopt identical MCS, namely adopt the MCS of low order, will certainly impact transmission rate, different spatial flows therefore should be enable in this canonical system to adopt different MCS transmission.And when different spaces stream can adopt different MCS transmission, optional MCS can expand more on existing 10 kinds of MCS bases, and existing MCS territory cannot indicate the MCS of all kinds.Therefore, under the prerequisite ensureing transmission reliability, in this canonical system, how making different spatial flows select different MCS according to channel condition, and enable its MCS territory indicate MCS as much as possible, is current problem demanding prompt solution.
Summary of the invention
In view of this, main purpose of the present invention is the MCS indicating means and the device that provide a kind of spatial flow, can adopt different MCS to realize different spatial flows, and has that MCS as much as possible is selective carries out transfer of data.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of code modulation mode (MCS) indicating means of spatial flow, the method comprises:
Multi-user's multiple-input and multiple-output (MU-MIMO) signal is divided into control information part and load information part, wherein, described control information part is divided into common control information part and exclusive control information part, described common control information part is used to indicate the public control information of each user, and described exclusive control information part is used for indicating control information proprietary separately for each user;
By described common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt.
Described by common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt, is specially:
For multi-user, if the different spaces stream of described multi-user adopts different MCS, then by common control information reserve part and exclusive control information MCS combination partly, the terminal to user place indicates the MCS of each user to choose mode; If the different spaces stream of described multi-user not adopts different MCS, then by exclusive control information MCS part, the terminal to user place indicates the MCS of each user to choose mode;
For single user, if the different spaces stream of described single user adopts identical MCS, then by described common control information MCS part, the terminal to user place indicates the MCS of described user to choose mode; If the different spaces stream of described single user not adopts identical MCS, then by common control information reserve part and common control information MCS combination partly, the terminal to user place indicates the MCS of described user to choose mode.
The method comprises further:
For multi-user, when the different spaces stream of described multi-user adopts different MCS, if adopt Space-Time Block Coding (STBC) coding, then MCS when being 2 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2,3,4 according to channel conditions indicating user spatial stream number chooses mode.
The method comprises further:
For single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, then MCS when being 2 to 4 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2 to 8 according to channel conditions indicating user spatial stream number chooses mode.
The method comprises further:
For single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, new MCS territory then by being made up of two reserved bit and the common control information MCS part of described common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode; If do not adopt STBC to encode, then the new MCS territory by being made up of three reserved bit and the common control information MCS part of described common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode.
Present invention also offers a kind of MCS indicating device of spatial flow, this device comprises:
Divide module, for MU-MIMO signal is divided into control information part and load information part, wherein, described control information part is divided into common control information part and exclusive control information part, described common control information part is used to indicate the public control information of each user, and described exclusive control information part is used for indicating control information proprietary separately for each user;
Indicating module, for by described common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt.
Described indicating module is further used for,
For multi-user, if the different spaces stream of described multi-user adopts different MCS, then by common control information reserve part and exclusive control information MCS combination partly, the terminal to user place indicates the MCS of each user to choose mode; If the different spaces stream of described multi-user not adopts different MCS, then by exclusive control information MCS part, the terminal to user place indicates the MCS of each user to choose mode;
For single user, if the different spaces stream of described single user adopts identical MCS, then by described common control information MCS part, the terminal to user place indicates the MCS of described user to choose mode; If the different spaces stream of described single user not adopts identical MCS, then by common control information reserve part and common control information MCS combination partly, the terminal to user place indicates the MCS of described user to choose mode.
Described indicating module is further used for,
For multi-user, when the different spaces stream of described multi-user adopts different MCS, if adopt STBC coding, then MCS when being 2 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2,3,4 according to channel conditions indicating user spatial stream number chooses mode.
Described indicating module is further used for,
For single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, then MCS when being 2 to 4 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2 to 8 according to channel conditions indicating user spatial stream number chooses mode.
Described indicating module is further used for,
For single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, new MCS territory then by being made up of two reserved bit and the common control information MCS part of described common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode; If do not adopt STBC to encode, then the new MCS territory by being made up of three reserved bit and the common control information MCS part of described common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode.
The MCS indicating means of a kind of spatial flow provided by the present invention and device, multi-user's multiple-input and multiple-output (MU-MIMO) signal is divided into control information part and load information part, wherein, control information part is divided into common control information part and exclusive control information part, common control information part is used to indicate the public control information of each user, and exclusive control information part is used for indicating control information proprietary separately for each user; By common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt.
By the present invention, under the prerequisite ensureing transmission reliability, achieve different spaces stream and different MCS can be adopted to carry out transfer of data, and have that MCS as much as possible is selective carries out transfer of data; In addition, the present invention is compared to existing technology without the need to increasing any additional signaling overhead.
Accompanying drawing explanation
Fig. 1 is the flow chart of the MCS indicating means of a kind of spatial flow of the present invention;
Fig. 2 is the composition structural representation of the MCS indicating device of a kind of spatial flow of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
The MCS indicating means of a kind of spatial flow provided by the present invention, multi-user's multiple-input and multiple-output (MU-MIMO, Multiple User Multiple-Input Multiple-Output) signal is divided into control information part and load information part; Wherein, control information part is divided into again common control information part and exclusive control information part, and common control information part is used to indicate the public control information of each user, and exclusive control information part is that each user indicates control information proprietary separately.Utilize the multiple bits in control information part, the MCS that the terminal to user place indicates each user to adopt.
Preferably, the MCS that can adopt with common control information part indicating user in the present invention, also can with the MCS adopted described in exclusive control information part indicating user, or the MCS that also can adopt with common control information part and the common indicating user of exclusive control information part.By common control information part and/or exclusive control information part, after the MCS that the terminal at user place indicates each user to adopt, the data of each user adopt the corresponding MCS of instruction carry out coded modulation and send by terminal respectively.
The MCS indicating means of concrete spatial flow as shown in Figure 1, mainly comprises:
For multi-user, if the different spaces stream of described multi-user adopts different MCS, then by common control information reserve part and exclusive control information MCS combination partly, the terminal to user place indicates the MCS of each user to choose mode; If the different spaces stream of described multi-user not adopts different MCS, then by exclusive control information MCS part, the terminal to user place indicates the MCS of each user to choose mode;
For single user, if the different spaces stream of single user adopts identical MCS, then by common control information MCS part, the terminal to user place indicates the MCS of described user to choose mode; If the different spaces stream of single user not adopts identical MCS, then by common control information reserve part and common control information MCS combination partly, the terminal to user place indicates the MCS of described user to choose mode.
Further, for multi-user, when the different spaces stream of described multi-user adopts different MCS, if adopt Space-Time Block Coding (STBC, Space Time Block Code) coding, then MCS when being 2 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2,3,4 according to channel conditions indicating user spatial stream number chooses mode.
Further, for single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, then MCS when being 2 to 4 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2 to 8 according to channel conditions indicating user spatial stream number chooses mode.
In addition, for single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, new MCS territory then by being made up of two reserved bit and the common control information MCS part of common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode; If do not adopt STBC to encode, then the new MCS territory by being made up of three reserved bit and the common control information MCS part of common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode.
Referring to the MCS indicating means flow chart of spatial flow shown in Fig. 1, and in conjunction with specific embodiments the MCS indicating means of above-mentioned spatial flow is further described.
For multi-user in embodiments of the invention one, can utilize reserved (Reserved) bit (as the first reserved bit B22 or the second reserved bit B23 etc.) of one of them in common control information reserve part.For B22, B22 in common control information reserve part is set to 0, be used to indicate following situation: in multiple user, the different spaces stream of some user adopts identical MCS, the different spaces stream of some user adopts different MCS, or the different spaces stream of each user adopts identical MCS.Certainly, also the B22 in common control information reserve part can be set to 1 in practical application, be used to indicate above situation, these needs are selected according to actual conditions; The concrete assignment of the reserved bit in subsequent embodiment and the present embodiment similar, also specifically do not limit.
Now, existing MCS table is expanded to 16 kinds of MCS and chooses mode, front 10 kinds of MCS choose mode and represent that different spaces stream adopts the situation of identical MCS (to comprise the situation that user only has a spatial flow, at this moment a kind of MCS can only be adopted), rear 6 kinds of MCS choose mode for representing that the different spaces stream of user adopts the situation of different MCS.Code check (Coding Rate) only adopts 1/2.Concrete:
If user has two spatial flows, then these two spatial flows select 256 quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation), 64QAM respectively, or select 64QAM, 16QAM respectively, and this is that two kinds of MCS choose mode;
If user has three spatial flows, then latter two spatial flow adopts identical MCS, MCS chooses mode and chooses mode with reference to MCS during two spatial flows, that is: previous spatial flow selects 256QAM, latter two spatial flow to select 64QAM, or previous spatial flow selects 64QAM, latter two spatial flow to select 16QAM, and this is also that two kinds of MCS choose mode;
If user has four spatial flows, then the first two spatial flow, latter two spatial flow adopt identical MCS respectively, MCS chooses mode and also chooses mode with reference to MCS during two spatial flows, that is: the first two spatial flow selects 256QAM, latter two spatial flow to select 64QAM, or the first two spatial flow selects 64QAM, latter two spatial flow to select 16QAM, and this is also that two kinds of MCS choose mode;
Above-mentioned six kinds of MCS altogether choose mode, 10 kinds of MCS before adding choose mode (namely representing that different spaces stream adopts the situation of identical MCS), and totally 16 kinds of MCS are chosen mode and can be indicated (needing 4 bits) by exclusive control information MCS part.
For multi-user in embodiments of the invention two, to the reserved bit of two in common control information reserve part (as the first reserved bit B22 and the second reserved bit B23), can utilize.B22 in common control information reserve part is set to 1, and the different spaces stream being used to indicate each user in multiple user adopts different MCS; B23 is set to 1 expression code check and adopts 1/2, is set to 0 expression code check and adopts 3/4.STBC is set to 0, namely represents and does not adopt STBC to encode, then the spatial stream number of user can be 2,3,4.At 256QAM, 64QAM, 16QAM, Quadrature Phase Shift Keying (QPSK, Quadrature Phase ShiftKeying) in these four kinds of modulation systems optional two kinds, by each spatial stream number, the spatial stream number that channel quality is good is forward, and the order of modulation of numbering forward spatial flow is not less than the order of modulation of numbering spatial flow rearward.Concrete:
If user has two spatial flows, then these two spatial flows are selected from these four kinds of modulation systems of 256QAM, 64QAM, 16QAM, QPSK, comprise following six kinds of MCS and choose mode:
Previous spatial flow selects 256QAM, a rear spatial flow selects 64QAM;
Previous spatial flow selects 256QAM, a rear spatial flow selects 16QAM;
Previous spatial flow selects 256QAM, a rear spatial flow selects QPSK;
Previous spatial flow selects 64QAM, a rear spatial flow selects 16QAM;
Previous spatial flow selects 64QAM, a rear spatial flow selects QPSK;
Previous spatial flow selects 16QAM, a rear spatial flow selects QPSK;
If user has three spatial flows, then latter two stream adopts identical MCS, and these three spatial flows are selected from these four kinds of modulation systems of 256QAM, 64QAM, 16QAM, QPSK, comprise following six kinds of MCS and choose mode:
Previous spatial flow selects 256QAM, latter two spatial flow to select 64QAM;
Previous spatial flow selects 256QAM, latter two spatial flow to select 16QAM;
Previous spatial flow selects 256QAM, latter two spatial flow to select QPSK;
Previous spatial flow selects 64QAM, latter two spatial flow to select 16QAM;
Previous spatial flow selects 64QAM, latter two spatial flow to select QPSK;
Previous spatial flow selects 16QAM, latter two spatial flow to select QPSK;
If user has four spatial flows, then the first two spatial flow, latter two spatial flow adopt identical MCS respectively, and these four spatial flows are selected from these four kinds of modulation systems of 256QAM, 64QAM, 16QAM, QPSK, comprise following four kinds of MCS and choose mode:
The first two spatial flow selects 256QAM, latter two spatial flow to select 64QAM;
The first two spatial flow selects 256QAM, latter two spatial flow to select 16QAM;
The first two spatial flow selects 64QAM, latter two spatial flow to select 16QAM;
The first two spatial flow selects 16QAM, latter two spatial flow to select QPSK.This is that the preferably four kinds of MCS selected by emulation testing choose mode.
All MCS that above-mentioned 2 ~ 4 spatial flows are corresponding choose mode, and altogether 16 kinds of MCS are chosen mode and can be indicated (needing 4 bits) by exclusive control information MCS part.
For multi-user in embodiments of the invention three, to the reserved bit of two in common control information reserve part (as the first reserved bit B22 and the second reserved bit B23), can utilize.B22 in common control information reserve part is set to 1, and the different spaces stream being used to indicate each user in multiple user adopts different MCS; B23 is set to 1 expression code check and adopts 1/2, is set to 0 expression code check and adopts 3/4.STBC is set to 1, and namely represent and adopt STBC coding, then the spatial stream number of user is 2.At 256QAM, 64QAM, 16QAM, QPSK, two-phase PSK (BPSK, Binary Phase Shift Keying) in these five kinds of modulation systems optional two kinds, by each spatial stream number, the spatial stream number that channel quality is good is forward, and the order of modulation of numbering forward spatial flow is not less than the order of modulation of numbering spatial flow rearward.Specifically comprise following 10 kinds of MCS and choose mode:
Previous spatial flow selects 256QAM, a rear spatial flow selects 64QAM;
Previous spatial flow selects 256QAM, a rear spatial flow selects 16QAM;
Previous spatial flow selects 256QAM, a rear spatial flow selects QPSK;
Previous spatial flow selects 256QAM, a rear spatial flow selects BPSK;
Previous spatial flow selects 64QAM, a rear spatial flow selects 16QAM;
Previous spatial flow selects 64QAM, a rear spatial flow selects QPSK;
Previous spatial flow selects 64QAM, a rear spatial flow selects BPSK;
Previous spatial flow selects 16QAM, a rear spatial flow selects QPSK;
Previous spatial flow selects 16QAM, a rear spatial flow selects BPSK;
Previous spatial flow selects QPSK, a rear spatial flow selects BPSK.
Above-mentioned 10 kinds of MCS are chosen mode and can be indicated (needing 4 bits) by exclusive control information MCS part.
For single user in embodiments of the invention four, when STBC is set to 1, namely adopt STBC coding, then the spatial stream number of user can be 1,2,3,4.When different spatial flows adopts MCS identical (comprise the situation that user only has a spatial flow, at this moment can only adopt a kind of MCS), then still adopt existing MCS to show, totally 10 kinds of MCS choose mode; When different spatial flows adopts different MCS, optional in these four kinds of modulation systems of 256QAM, 64QAM, 16QAM, QPSK, by each spatial stream number, the spatial stream number that channel quality is good is forward, the order of modulation of numbering forward spatial flow is not less than the order of modulation of numbering spatial flow rearward, and the order of modulation of first stream is greater than the order of modulation of last stream.Concrete:
If user has two spatial flows, then these two spatial flows are selected from these four kinds of modulation systems of 256QAM, 64QAM, 16QAM, QPSK, comprise six kinds of MCS and choose mode (with reference to embodiment two);
If user has three spatial flows, then these three spatial flows are selected from these four kinds of modulation systems of 256QAM, 64QAM, 16QAM, QPSK, specifically comprise following 16 kinds of MCS and choose mode:
First spatial flow selects 256QAM, second spatial flow selection 256QAM, the 3rd spatial flow selection 64QAM;
First spatial flow selects 256QAM, second spatial flow selection 256QAM, the 3rd spatial flow selection 16QAM;
First spatial flow selects 256QAM, second spatial flow selection 256QAM, the 3rd spatial flow selection QPSK;
First spatial flow selects 256QAM, second spatial flow selection 64QAM, the 3rd spatial flow selection 64QAM;
First spatial flow selects 256QAM, second spatial flow selection 64QAM, the 3rd spatial flow selection 16QAM;
First spatial flow selects 256QAM, second spatial flow selection 64QAM, the 3rd spatial flow selection QPSK;
First spatial flow selects 256QAM, second spatial flow selection 16QAM, the 3rd spatial flow selection 16QAM;
First spatial flow selects 256QAM, second spatial flow selection 16QAM, the 3rd spatial flow selection QPSK;
First spatial flow selects 256QAM, second spatial flow selection QPSK, the 3rd spatial flow selection QPSK;
First spatial flow selects 64QAM, second spatial flow selection 64QAM, the 3rd spatial flow selection 16QAM;
First spatial flow selects 64QAM, second spatial flow selection 64QAM, the 3rd spatial flow selection QPSK;
First spatial flow selects 64QAM, second spatial flow selection 16QAM, the 3rd spatial flow selection 16QAM;
First spatial flow selects 64QAM, second spatial flow selection 16QAM, the 3rd spatial flow selection QPSK;
First spatial flow selects 64QAM, second spatial flow selection QPSK, the 3rd spatial flow selection QPSK;
First spatial flow selects 16QAM, second spatial flow selection 16QAM, the 3rd spatial flow selection QPSK;
First spatial flow selects 16QAM, second spatial flow selection QPSK, the 3rd spatial flow selection QPSK;
If user has four spatial flows, then these four spatial flows are selected from these four kinds of modulation systems of 256QAM, 64QAM, 16QAM, QPSK, have 31 kinds of MCS to choose mode.
All MCS that above-mentioned 1 ~ 4 spatial flow is corresponding choose mode, amount to 63 kinds of MCS and choose mode, can be indicated by the new MCS territory (totally 6 bits) be made up of the first reserved bit B22 in common control information reserve part and the second reserved bit B23 and common control information MCS part (4 bit).
For single user in embodiments of the invention five, when STBC is set to 0, namely do not adopt STBC to encode, then user's space fluxion can be 1,2,3,4,5,6,7,8.When spatial stream number is less than 4, identical with embodiment four, totally 63 kinds of MCS choose mode.When spatial stream number is greater than 4, still adopt in these four kinds of modulation systems of 256QAM, 64QAM, 16QAM, QPSK optional, by each spatial stream number, the spatial stream number that channel quality is good is forward, and the order of modulation of numbering forward spatial flow is not less than the order of modulation of numbering spatial flow rearward.Concrete:
If user has five spatial flows, then the first two spatial flow, rear three spatial flows adopt identical MCS respectively, have 6 kinds of MCS to choose mode;
If user has six spatial flows, then first three spatial flow, rear three spatial flows adopt identical MCS respectively, have 6 kinds of MCS and choose mode;
If user has seven spatial flows, then the first two spatial flow, the 3rd and four spatial flows, rear three spatial flows adopt identical MCS respectively, have 16 kinds of MCS and choose mode;
If user has eight spatial flows, be then divided into four groups according to the sequencing of spatial stream number, each group adopts identical MCS respectively, has 31 kinds of MCS and chooses mode.
All MCS that above-mentioned 1 ~ 8 spatial flow is corresponding choose mode, amount to 122 kinds of MCS and choose mode, can be indicated by the new MCS territory (totally 7 bits) be made up of the first reserved bit B22, the second reserved bit B23 in common control information reserve part and the 3rd reserved bit and common control information MCS part (4 bit).
The MCS indicating means of corresponding above-mentioned spatial flow, present invention also offers a kind of MCS indicating device of spatial flow, as shown in Figure 2, this device comprises: divide module 21 and indicating module 22.Wherein, divide module 21, for MU-MIMO signal is divided into control information part and load information part, wherein, control information part is divided into common control information part and exclusive control information part, common control information part is used to indicate the public control information of each user, and exclusive control information part is used for indicating control information proprietary separately for each user.Indicating module 22, for passing through common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt.
Preferably, indicating module 22 also can be used for, for multi-user, if the different spaces stream of described multi-user adopts different MCS, then by common control information reserve part and exclusive control information MCS combination partly, the terminal to user place indicates the MCS of each user to choose mode; If the different spaces stream of described multi-user not adopts different MCS, then by exclusive control information MCS part, the terminal to user place indicates the MCS of each user to choose mode;
For single user, if the different spaces stream of described single user adopts identical MCS, then by common control information MCS part, the terminal to user place indicates the MCS of described user to choose mode; If the different spaces stream of described single user not adopts identical MCS, then by common control information reserve part and common control information MCS combination partly, the terminal to user place indicates the MCS of described user to choose mode.
Preferably, indicating module 22 also can be used for, and for multi-user, when the different spaces stream of described multi-user adopts different MCS, if adopt STBC coding, then MCS when being 2 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2,3,4 according to channel conditions indicating user spatial stream number chooses mode.
Preferably, indicating module 22 also can be used for, and for single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, then MCS when being 2 to 4 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2 to 8 according to channel conditions indicating user spatial stream number chooses mode.
Preferably, indicating module 22 also can be used for, for single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, new MCS territory then by being made up of two reserved bit and the common control information MCS part of common control information part, the terminal to user place indicates the MCS of described user to choose mode; If do not adopt STBC to encode, then the new MCS territory by being made up of three reserved bit and the common control information MCS part of common control information part, the terminal to user place indicates the MCS of described user to choose mode.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (8)
1. code modulation mode (MCS) indicating means for spatial flow, it is characterized in that, the method comprises:
Multi-user's multiple-input and multiple-output (MU-MIMO) signal is divided into control information part and load information part, wherein, described control information part is divided into common control information part and exclusive control information part, described common control information part is used to indicate the public control information of each user, and described exclusive control information part is used for indicating control information proprietary separately for each user;
By described common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt;
Described by common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt, is specially:
For multi-user, if the different spaces stream of described multi-user adopts different MCS, then by common control information reserve part and exclusive control information MCS combination partly, the terminal to user place indicates the MCS of each user to choose mode; If the different spaces stream of described multi-user not adopts different MCS, then by exclusive control information MCS part, the terminal to user place indicates the MCS of each user to choose mode;
For single user, if the different spaces stream of described single user adopts identical MCS, then by described common control information MCS part, the terminal to user place indicates the MCS of described user to choose mode; If the different spaces stream of described single user not adopts identical MCS, then by common control information reserve part and common control information MCS combination partly, the terminal to user place indicates the MCS of described user to choose mode.
2. the MCS indicating means of spatial flow according to claim 1, it is characterized in that, the method comprises further:
For multi-user, when the different spaces stream of described multi-user adopts different MCS, if adopt Space-Time Block Coding (STBC) coding, then MCS when being 2 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2,3,4 according to channel conditions indicating user spatial stream number chooses mode.
3. the MCS indicating means of spatial flow according to claim 1, it is characterized in that, the method comprises further:
For single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, then MCS when being 2 to 4 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2 to 8 according to channel conditions indicating user spatial stream number chooses mode.
4. the MCS indicating means of spatial flow according to claim 3, it is characterized in that, the method comprises further:
For single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, new MCS territory then by being made up of two reserved bit and the common control information MCS part of described common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode; If do not adopt STBC to encode, then the new MCS territory by being made up of three reserved bit and the common control information MCS part of described common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode.
5. a MCS indicating device for spatial flow, is characterized in that, this device comprises:
Divide module, for MU-MIMO signal is divided into control information part and load information part, wherein, described control information part is divided into common control information part and exclusive control information part, described common control information part is used to indicate the public control information of each user, and described exclusive control information part is used for indicating control information proprietary separately for each user;
Indicating module, for by described common control information part and/or exclusive control information part, the MCS that the terminal to user place indicates each user to adopt;
Wherein, described indicating module is further used for,
For multi-user, if the different spaces stream of described multi-user adopts different MCS, then by common control information reserve part and exclusive control information MCS combination partly, the terminal to user place indicates the MCS of each user to choose mode; If the different spaces stream of described multi-user not adopts different MCS, then by exclusive control information MCS part, the terminal to user place indicates the MCS of each user to choose mode;
For single user, if the different spaces stream of described single user adopts identical MCS, then by described common control information MCS part, the terminal to user place indicates the MCS of described user to choose mode; If the different spaces stream of described single user not adopts identical MCS, then by common control information reserve part and common control information MCS combination partly, the terminal to user place indicates the MCS of described user to choose mode.
6. the MCS indicating device of spatial flow according to claim 5, it is characterized in that, described indicating module is further used for,
For multi-user, when the different spaces stream of described multi-user adopts different MCS, if adopt STBC coding, then MCS when being 2 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2,3,4 according to channel conditions indicating user spatial stream number chooses mode.
7. the MCS indicating device of spatial flow according to claim 5, it is characterized in that, described indicating module is further used for,
For single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, then MCS when being 2 to 4 according to channel conditions indicating user spatial stream number chooses mode; If do not adopt STBC to encode, then MCS when being 2 to 8 according to channel conditions indicating user spatial stream number chooses mode.
8. the MCS indicating device of spatial flow according to claim 7, it is characterized in that, described indicating module is further used for,
For single user, when the different spaces stream of described single user not adopts identical MCS, if adopt STBC coding, new MCS territory then by being made up of two reserved bit and the common control information MCS part of described common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode; If do not adopt STBC to encode, then the new MCS territory by being made up of three reserved bit and the common control information MCS part of described common control information reserve part, the terminal to user place indicates the MCS of described user to choose mode.
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| CN103580788A (en) * | 2012-07-27 | 2014-02-12 | 电信科学技术研究院 | Method and device for transmitting MCS instructing information |
| KR101791761B1 (en) | 2013-01-11 | 2017-10-30 | 인터디지탈 패튼 홀딩스, 인크 | System and method for adaptive modulation |
| WO2018133052A1 (en) * | 2017-01-20 | 2018-07-26 | 华为技术有限公司 | Downlink signal transmission method, device, and system |
| CN113037341B (en) * | 2019-12-25 | 2022-04-05 | 大唐移动通信设备有限公司 | Configuration method and device for multiple-input multiple-output (MIMO) stream number |
| CN117713991A (en) * | 2022-09-07 | 2024-03-15 | 华为技术有限公司 | Multi-space stream transmission method and related device |
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| CN1879325A (en) * | 2003-11-19 | 2006-12-13 | 三星电子株式会社 | Apparatus and method for transmitting and receiving common control information in a wireless communication system |
| CN101617559A (en) * | 2007-01-09 | 2009-12-30 | 株式会社Ntt都科摩 | Base station, communication terminal, sending method and method of reseptance |
| CN101848063A (en) * | 2010-05-21 | 2010-09-29 | 北京新岸线无线技术有限公司 | Data transmission method for supporting sub-channel modulation coding and wireless local area network system |
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| CN101617559A (en) * | 2007-01-09 | 2009-12-30 | 株式会社Ntt都科摩 | Base station, communication terminal, sending method and method of reseptance |
| CN101848063A (en) * | 2010-05-21 | 2010-09-29 | 北京新岸线无线技术有限公司 | Data transmission method for supporting sub-channel modulation coding and wireless local area network system |
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