CN101374000B - Initialization method for multi-input multi-output mode - Google Patents
Initialization method for multi-input multi-output mode Download PDFInfo
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- CN101374000B CN101374000B CN200710140491A CN200710140491A CN101374000B CN 101374000 B CN101374000 B CN 101374000B CN 200710140491 A CN200710140491 A CN 200710140491A CN 200710140491 A CN200710140491 A CN 200710140491A CN 101374000 B CN101374000 B CN 101374000B
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Abstract
An initialization method of a multiple-input multiple-output (MIMO) mode comprises the following steps: (a) a user sends a random access request to a base station; (b) the base station selects a MIMO mode for the user according to the received random access request, adds an identification of the MIMO mode to a random access request response, and sends to the user; and (c) the user receives and resolves the identification of the MIMO mode in the random access request response. The inventive method can increase capacity and user access quantity of the system in case of large system load, so as to take equity into account, reduce cost, and better satisfy the requirements for quality of service (QoS).
Description
Technical field
The present invention relates to support the communication system of multiple MIMO mode, relate in particular to the initialized method of a kind of MIMO mode.
Background technology
Multiple-input and multiple-output (MIMO) system can improve systematic function under the situation that does not increase system bandwidth, resist multipath fading to a certain extent, improves data rate.The MIMO technology has become one of key technology of next generation wireless communication system; And the research of mimo system has been deep in the various modes for example single user's MIMO mode (SU-MIMO pattern) and multi-user multiple input multiple output mode (MU-MIMO pattern) at present.
In order to make the mimo system under the different mode all reach optimal performance; It is different to dispatch needed field feedback (for example channel quality indication, pre-coding matrix index); So need the user carry out notifying before these feedback information this user its will be scheduled as which kind of MIMO pattern; Be the initialization of MIMO pattern, this user can carry out feedback information with reference to the MIMO pattern of being notified then.
In the prior art; User for initial access; The initialized signaling of MIMO pattern is just sent to this user in the base station after accomplishing random access procedure, increased the signalling interactive process between user and base station like this, has increased system's time delay and user's stand-by period.
Summary of the invention
The technical problem that the present invention will solve provides the initialized method of a kind of MIMO mode, makes the user when accomplishing random access procedure, has also accomplished the initialized process of its MIMO pattern.
The technical scheme that the present invention adopts is:
The initialized method of a kind of MIMO mode may further comprise the steps:
A, user send the request that inserts at random to the base station;
Ask according to above-mentioned the access at random that receives b, base station, for the user selects MIMO mode, and after adding to the sign of this pattern in the above-mentioned request of the access at random response, sends to the user;
C, user receive and parse the sign that inserts the MIMO mode in the request response at random.
Further, among the step b, the classification of MIMO mode is selected in the base station for the user according to one in the following factor or its combination in any: insert number of users or insert state of user or system load.
Further, also comprise steps d: the user is according to the sign of the MIMO mode that parses, the pattern class when judging its first access.
Further, also comprise step e after the steps d: the user then carries out feedback information to the base station as accepting the MIMO mode classification of base station for its distribution; Otherwise user's refusal carries out feedback information to the base station.
Further, among the step e, the user comprises following any one or its combination to the information of base station feedback: channel quality indication, pre-coding matrix index.
Adopt the present invention, can when system load is big, improve the capacity of system and insert number of users, look after fairness, reduce expense, and can better satisfy QoS (service quality) requirement.
Description of drawings
Fig. 1 is the initialized method sketch map of MIMO pattern in the embodiment of the invention.
Embodiment
To combine accompanying drawing and embodiment that technical scheme of the present invention is explained in more detail below.
The initialized method of a kind of MIMO mode provided by the invention may further comprise the steps:
A, user send the request that inserts at random to the base station;
B, base station are after receiving access request at random; Select MIMO mode (as when the access number of users is too much according to its state value (comprising any or its combination in any in the following factor: insert number of users or insert state of user (like service quality QOS) or system load etc.) for the user; Can this user be made as the MU-MIMO pattern; But be not limited to this pattern); After then the sign of this MIMO mode being added into access request response at random, send to the user;
C, user receive and parse the sign that inserts request response MIMO mode at random;
D, user be according to the sign of the MIMO mode that parses, the pattern class when judging its first access;
E, accept the pattern class that it parses like the user, then it carries out feedback information to the base station, and this information comprises channel quality indication or pre-coding matrix index or its combination etc.; Otherwise user's refusal carries out feedback information to the base station.
Support simultaneously that with one the system of SU-MIMO pattern and MU-MIMO pattern is that example is further explained below.As shown in Figure 1, may further comprise the steps:
1, the base station receives the request of the access at random RAP_A from user A;
Surpass its predefined threshold value if 2 base stations detect system load this moment, then user A is set to the MU-MIMO pattern; Do not reach a certain threshold value if the base station detects system load this moment, then user A is set to the SU-MIMO pattern;
If 3 base station user A are set to the SU-MIMO pattern, then the sign of the MIMO pattern of user A is set to " 0 ", and in inserting the request response at random, sends;
If base station user A is set to the MU-MIMO pattern, then the sign of the MIMO pattern of user A is set to " 1 ", and in inserting the request response at random, sends;
4, after user A receives the request of the access at random response from the base station; If parse its MIMO pattern identification is " 0 "; Then can carry out feedback information to the base station, comprise: channel quality indicator (CQI) _ SU and pre-coding matrix index PMI_SU with reference to the SU-MIMO requirement; Be " 1 " if parse its MIMO pattern identification, then can require to comprise: channel quality indicator (CQI) _ MU and pre-coding matrix index PMI_MU with reference to MU-MIMO to carrying out feedback information in the base station; Perhaps refusal feeds back (promptly not accepting the MIMO pattern of base station for its distribution).
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (3)
1. the initialized method of MIMO mode is characterized in that, may further comprise the steps:
A, user send the request that inserts at random to the base station;
B, said base station ask to select MIMO mode for said user according to said the access at random that receives, and after adding to the sign of this pattern in the said request of the access at random response, send to said user;
C, said user receive and parse the said sign that inserts the MIMO mode in the request response at random;
D, said user be according to the sign of the said MIMO mode that parses, the pattern class when judging its first access;
Wherein, among the step b, said base station is the classification that said user selects MIMO mode according to one in the following factor or its combination in any: insert number of users or insert state of user or system load.
2. the method for claim 1 is characterized in that, also comprises step e after the steps d: said user then carries out feedback information to said base station as accepting the said MIMO mode classification of said base station for its distribution; Otherwise said user's refusal carries out feedback information to said base station.
3. method as claimed in claim 2 is characterized in that, among the step e, said user comprises following any one or its combination to the information of said base station feedback: channel quality indication or pre-coding matrix index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200710140491A CN101374000B (en) | 2007-08-24 | 2007-08-24 | Initialization method for multi-input multi-output mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710140491A CN101374000B (en) | 2007-08-24 | 2007-08-24 | Initialization method for multi-input multi-output mode |
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| CN101374000A CN101374000A (en) | 2009-02-25 |
| CN101374000B true CN101374000B (en) | 2012-09-26 |
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| CN200710140491A Expired - Fee Related CN101374000B (en) | 2007-08-24 | 2007-08-24 | Initialization method for multi-input multi-output mode |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692739B (en) * | 2009-10-09 | 2015-05-20 | 中兴通讯股份有限公司 | Method and device for indicating transmission mode |
| US8369303B2 (en) * | 2010-07-28 | 2013-02-05 | Intel Corporation | Techniques for uplink multi-user MIMO MAC support |
| CN103178882B (en) * | 2011-12-23 | 2016-01-27 | 中国移动通信集团公司 | A kind of 3D MIMO downdip adjusting method, device and base station |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636346A (en) * | 2002-01-08 | 2005-07-06 | 高通股份有限公司 | Resource allocation for MIMO-OFDM communication systems |
| CN1812386A (en) * | 2005-01-27 | 2006-08-02 | 松下电器产业株式会社 | Quadrature frequency division multiplexing communication system with low-complexity and multi-user switching-in method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636346A (en) * | 2002-01-08 | 2005-07-06 | 高通股份有限公司 | Resource allocation for MIMO-OFDM communication systems |
| CN1812386A (en) * | 2005-01-27 | 2006-08-02 | 松下电器产业株式会社 | Quadrature frequency division multiplexing communication system with low-complexity and multi-user switching-in method |
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