CN101965011B - Method and device for realizing selection of multiple antenna transmission modes - Google Patents

Method and device for realizing selection of multiple antenna transmission modes Download PDF

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Publication number
CN101965011B
CN101965011B CN200910089785.3A CN200910089785A CN101965011B CN 101965011 B CN101965011 B CN 101965011B CN 200910089785 A CN200910089785 A CN 200910089785A CN 101965011 B CN101965011 B CN 101965011B
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user
mimo pattern
mimo
pairing
module
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CN101965011A (en
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彭爱华
李晓辉
李峰
赵楠
田开波
魏民
牛军涛
薛鑫
徐鑫昌
任敏
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Global Innovation Polymerization LLC
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ZTE Corp
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Abstract

The invention provides a method and device for realizing selection of multiple antenna transmission modes. The method of the invention comprises the following steps: a base station determines that multiple antenna access modes need switching according to system load; the base station selects a first user of a virtual multiple input multiple output (V-MIMO) mode, and selects a matched user of the V-MIMO mode; and the base station sends control information to the matched user adopting the V-MIMO mode. By the scheme of the invention, the system realizes selection between single-user multiple input multiple output (SU-MIMO)/multi-user multiple input multiple output (MU-MIMO) and V-MIMO of the multiple antenna transmission modes. The invention effectively exerts the effect of MU-MIMO, relieves the problem of excessive load in an LTE uplink, and acquires higher system throughput by fully using space resources.

Description

A kind of method and device realizing multi-antenna transmission model selection
Technical field
The present invention relates to multiple-input, multiple-output (MIMO, Multi-Input Multi-Output) technology, espespecially a kind of method and device realizing multi-antenna transmission model selection.
Background technology
In order to realize the throughput of high speed data transfers and raising system, in 3G Long Term Evolution (LTE, Long Term Evolution) standard, introduce the MIMO technology that can make full use of space resources.
In order to effectively solve load Overdosing problems, enable more user connecting system simultaneously, a kind of uplink multi-users is proposed simultaneously with pattern and the virtual MIMO (V-MIMO of frequency connecting system in LTE, Virtual Multi-Input Multi-Output) pattern, increase the degree of freedom of Resourse Distribute by space multi-user transmission, make system can obtain multiuser multiplexing gain spatially.
V-MIMO is actually a kind of space division multiple access access (SDMA Space Division Multiple Access) method.From realizing angle, V-MIMO allows multiple user's (number of users≤base station is equipped with antenna number) singly entering to have more (SIMO, Single-Input Multi-Output) to send data in same time/frequency source block.From realizing effect, V-MIMO is actually that to carry out spatially to the data of multiple user multiplexing, and introduces receive diversity gain at receiving terminal.
In addition, at senior Long Term Evolution (LTE-A, LTE Advanced) in also support that MIMO user adopts the mode of operation of multi-user's multiple-input, multiple-output (MU-MIMO, Multi-User Multi-Input Multi-Output) to send in identical time/frequency source block.
In order to effectively play the effect of MU-MIMO, need system can according to loading condition, select at single user multiple-input, multiple-output (SU-MIMO, Single User Multi-Input Multi-Output) switch between/MU-MIMO and V-MIMO, to alleviate load Overdosing problems in LTE up link, by making full use of space resources, obtain higher throughput of system.
At present, not relevant public technology provides the scheme realizing multi-antenna transmission pattern and carry out selecting between SU-MIMO/MU-MIMO and V-MIMO.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method realizing multi-antenna transmission model selection, can selecting to switch between SU-MIMO/MU-MIMO and V-MIMO, with by making full use of space resources, obtaining higher throughput of system.
Another object of the present invention is to provide a kind of device realizing multi-antenna transmission model selection, select to switch between SU-MIMO/MU-MIMO and V-MIMO, with by making full use of space resources, obtaining higher throughput of system.
For achieving the above object, technical scheme of the present invention is achieved in that
Realize a method for multi-antenna transmission model selection, the method comprises:
The switching needing to carry out multiple antennas access module is determined in base station according to system load amount;
The first user of base station selected Virtual MIMO V-MIMO pattern, and select the pairing user of V-MIMO pattern;
Base station sends control information to adopting the pairing user of V-MIMO pattern.
The method also comprises and pre-sets load-threshold value; Describedly determine that the switching needing to carry out multiple antennas access module comprises:
System load amount is learnt by detection in described base station, and when the system load amount obtained is greater than default load-threshold value, determines and need to use V-MIMO pattern.
The first user of described V-MIMO pattern is the non real-time type service-user needing transferring large number of data.
The first user of described selection V-MIMO pattern comprises:
First, although option and installment single user list enters to have more SU-SIMO or is furnished with the first user of user as V-MIMO pattern that 2 antennas adopt SU-SIMO pattern; Next, option and installment double antenna also uses single user multiple-input, multiple-output SU-MIMO pattern to send the first user of user as V-MIMO pattern of data.
The first user of described V-MIMO pattern is first for adopting the user of bell laboratory layered space-time code BLAST mode;
The first user of described V-MIMO pattern is secondly for adopting the user of space-time block coding STBC or public number dictionary CDD mode.
The first user of described base station selected V-MIMO pattern specifically comprises:
The user of requested service is carried out to the calculating of service priority, and first by user scheduling high for priority in time domain and frequency domain resource;
From the user being assigned to resource, select the first user of V-MIMO pattern, form the first alternative user set { k 1, k 2k n.
Poll or proportional dispatching algorithm is utilized to realize the calculating of described service priority.
The described method selecting the pairing user of V-MIMO pattern from candidate user is: adopt and to match the pairing user of algorithms selection V-MIMO pattern based on restricted normalization F norm user.
Described employing is matched the pairing user of algorithms selection V-MIMO pattern based on restricted normalization F norm user and is specifically comprised:
The unallocated user to resource is formed candidate match user set { g 1, g 2g m, for described first alternative user set { k 1, k 2k nin certain user k n, calculated candidate pairing user set { g respectively 1, g 2g min each user g 1, g 2..., g mwith this user k ncorrelation factor wherein, n ∈ [1, N], m ∈ [1, M], n ' ∈ { k nshared subcarrier };
By the mode that multiple subcarrier is averaging, calculate match factor wherein, N ' is user k nand g mshared subcarrier, and work as time, judge that user can match and form V-MIMO pattern; When time, user does not match, process ends; Wherein, ξ thresholdingfor default pairing correlation threshold;
To the user forming V-MIMO pattern can be matched, if user is g mmeet: wherein n ' ∈ { k nshared subcarrier }, then this user g muser k nalternative pairing user; Or, if user is g mmeet: wherein, n ' ∈ { k nshared subcarrier }, then this user g muser k nalternative pairing user;
User k nalternative pairing user form user k nalternative pairing user set { p 1, p 2..., p q, and according to determine user k npairing user
Described pairing user an antenna is used to send data;
If described pairing user be equipped with 2 antennas, the method also comprises:
Carry out a day line options in advance, select wherein 1 antenna and send data;
Or, 2 antennas are calculated respectively, select a more standard compliant antenna as the antenna sending data.
Described control information comprises: current multi-antenna transmission mode, antenna selection mode, pilot frequency mode, and space-time encoding modes.
Realize a device for multi-antenna transmission model selection, comprise detection module, first and select module, second to select module and configuration module, wherein,
Detection module, for determining the switching needing to carry out multiple antennas access module according to system load amount, exports to the first selection module, the unallocated user profile to resource is exported to the second selection module by the user profile being assigned to resource;
First selects module, for being assigned to from what receive the first user selecting V-MIMO pattern in the user of resource, and the first user selected is exported to the second selection module;
Second selects module, in the user from the unallocated resource received, selects the pairing user of the V-MIMO pattern of matching with first user, and the user profile that success is matched is exported to configuration module;
Configuration module, for sending its control information to the pairing user of employing V-MIMO pattern.
As can be seen from the technical scheme that the invention described above provides, system, according to loading condition, achieves the selection of multi-antenna transmission pattern between SU-MIMO/MU-MIMO and V-MIMO.Effectively playing the effect of MU-MIMO, alleviated the problem that in LTE up link, load is excessive, by making full use of space resources, having obtained higher throughput of system.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention realizes the method for multi-antenna transmission model selection;
Fig. 2 is the composition structural representation that the present invention realizes the device of multi-antenna transmission model selection;
Fig. 3 is that the present invention realizes the flow chart of SU-SIMO/MIMO pattern to the embodiment of the switching of V-MIMO pattern;
Fig. 4 is the schematic diagram of the control information that in the present invention, base station sends.
Embodiment
Fig. 1 is the flow chart that the present invention realizes the method for multi-antenna transmission model selection, as shown in Figure 1, comprising:
Step 100: the switching needing to carry out multiple antennas access module is determined in base station according to system load amount.
Such as, system load amount can be learnt by detection in base station, and when the system load amount obtained is greater than default load-threshold value, determines that namely need to carry out multi-user MIMO transmissions uses V-MIMO pattern.Wherein, how base station is detected is learnt that the realization of system load amount belongs to technology as well known to those skilled in the art, repeats no more here.
By this step, can see, when system business is not busy, when namely system can meet customer service request by the scheduling of time domain and frequency domain resource, not use multi-user V-MIMO pattern.
Step 101: the first user of base station selected V-MIMO pattern, and the pairing user selecting V-MIMO pattern.
In this step, can be able to be as the user of the first user of V-MIMO pattern: the non real-time type service-user needing transferring large number of data.The method of selection first user is:
First, the user of option and installment single antenna and single user list enter to have more (SU-SIMO) although or be furnished with the first user (the latter here employ Antenna Selection Technology) of user as V-MIMO pattern that 2 antennas adopt SU-SIMO patterns.Next, option and installment double antenna also uses single user multiple-input, multiple-output SU-MIMO pattern to send the user of data.
In above-mentioned this kind of user, first select the user adopting bell laboratory layered space-time code (BLAST, Bell-Lab Layered Space Time Code) mode; Secondly, the user adopting space-time block coding (STBC, Space Time Block Coding) or public number dictionary (CDD, Common Digital Dictionary) mode is selected.These users once be selected as the first user of V-MIMO pattern, then need to adopt Antenna Selection Technology to select to send the antenna of data.
In this step, can adopt and match the pairing user of algorithms selection V-MIMO pattern based on restricted normalization F norm user, specific implementation can vide infra the description of embodiment.
Step 102: base station sends control information to adopting the pairing user of V-MIMO pattern.
Control information can comprise: current multi-antenna transmission mode, antenna selection mode, pilot frequency mode, and the information such as space-time encoding modes.
By the inventive method, system, according to loading condition, achieves the selection of multi-antenna transmission pattern between SU-MIMO/MU-MIMO and V-MIMO.Effectively playing the effect of MU-MIMO, alleviated the problem that in LTE up link, load is excessive, by making full use of space resources, having obtained higher throughput of system.
Fig. 2 is the composition structural representation that the present invention realizes the device of multi-antenna transmission model selection, and as shown in Figure 2, apparatus of the present invention comprise detection module, first and select module, second to select module and configuration module, wherein,
Detection module, for determining the switching needing to carry out multiple antennas access module according to system load amount, exports to the first selection module, the unallocated user profile to resource is exported to the second selection module by the user profile being assigned to resource.
First selects module, for being assigned to from what receive the first user selecting V-MIMO pattern in the user of resource, and the first user selected is exported to the second selection module.
Second selects module, in the user from the unallocated resource received, selects the pairing user of the V-MIMO pattern of matching with first user, and the user profile that success is matched is exported to configuration module.
Configuration module, for sending its control information to the pairing user of employing V-MIMO pattern.
Fig. 3 is that the present invention realizes the flow chart of SU-SIMO/MIMO pattern to the embodiment of the switching of V-MIMO pattern, and as shown in Figure 3, the present embodiment comprises:
Step 300: by detection, base station learns that system load amount is greater than default load-threshold value, determines to need to use V-MIMO pattern to certain customers.
Step 301: the calculating user of requested service being carried out to service priority, and first by user scheduling high for priority in time domain and frequency domain resource.
In this step, poll or the dispatching algorithm such as proportional can be utilized, the user of requested service is carried out to the calculating of service priority, and according to priority from height to low, by user scheduling in time domain and frequency domain resource, namely according to priority from height to low, be the user resource allocation of requested service.
Step 302: the first user selecting V-MIMO pattern from the user being assigned to resource.
In this step, according to the method selecting first user in step 101, from the user being assigned to resource, select the first alternative user of V-MIMO pattern, form the first alternative user set { k 1, k 2k n.
It should be noted that, the first alternative user set { k 1, k 2k nin user be only the first alternative user of V-MIMO pattern, whether it finally adopts V-MIMO mode transfer data, also needs determining further of step 303.First alternative user set { k 1, k 2k nin user represent one group sequence after one group of user, this sequence can be random, also can be reversing according to user's service priority, can also be other predetermined order criterion.
Step 303: adopt and to match the pairing user of first user of algorithms selection V-MIMO pattern based on restricted normalization F norm user.Namely the first alternative user set { k is followed successively by 1, k 2k nin user k 1, k 2... k nfind pairing user.
In the present embodiment, be described to match the pairing user of algorithms selection V-MIMO pattern based on restricted normalization F norm user.
By the set { g that the unallocated user to resource forms 1, g 2g mbe called candidate match user set.From candidate match user set { g 1, g 2g mmiddle selection the first alternative user set { k 1, k 2k nin certain first user (be assumed to be user k n, 1≤n≤N and n is integer) pairing user comprise:
First, user g is calculated 1, g 2..., g mwith the correlation factor of user kn: wherein, n ∈ [1, N], m ∈ [1, M], n ' ∈ { k nshared subcarrier }, as shown in formula (1):
with represent user k respectively nand g mand the channel between base station.For multicarrier system,
The mode that can be averaging by multiple subcarrier calculates correlation factor, as shown in formula (2):
ξ ‾ k n g m = 1 N ′ Σ n ′ = 1 N ′ ξ n ′ , k n g m - - - ( 2 )
Wherein, N ' is user k nand g msubcarrier shared by (1≤n≤N, 1≤m≤M, and n, m are integer).Introduce pairing correlation threshold ξ thresholding, regulation is worked as time, user can match and form V-MIMO pattern; When time, user does not match, process ends.Here, when disturbing all larger when between each subscriber channel, be just not suitable for adopting V-MIMO mode to send data, therefore a threshold value established to match factor, judge the send mode of user according to threshold value.
It should be noted that, formula (2) is that formula (1) is averaging each subcarrier and obtains.
Then, carry out threshold judgement, specific implementation can have following two kinds of modes:
First kind of way: tight judgement standard.That is, if for user g mmeet: n ' ∈ { k nshared subcarrier } }, then this user g muser k nalternative pairing user.
The second way: wide judgement standard.That is, if for user g mmeet: n ' ∈ { k nshared subcarrier } }, then this user g muser k nalternative pairing user.
By said method from candidate match user gather { g 1, g 2g min the user k that selects nalternative pairing user, composition user k nalternative pairing user set { p 1, p 2..., p q.
Finally, if user is k nalternative pairing user set be empty, then select and match user if user is k nalternative pairing user set for empty, so, user k ndo not adopt V-MIMO pattern, still use original mode transfer data.
From candidate match user set { g 1, g 2g min the user that matched of eliminating, then from residue pairing user set, by the method for the pairing user of above-mentioned selection first user, be the first alternative user set { k 1, k 2k nin also do not carry out matching the user that chooses of user and selected to match user.
As the first alternative user set { k 1, k 2k nin all users, or candidate match user set { g 1, g 2g min all users all carried out the step of the pairing user of above-mentioned selection first user after, complete this step.
It should be noted that, once candidate match user set { g 1, g 2g min certain user be selected as the pairing user of V-MIMO pattern, then an antenna can only be used to send data.For the user that those are equipped with 2 antennas, there are two kinds of antenna preference patterns:
Pattern 1: carry out a day line options in advance, selects the antenna sending data and use.
Pattern 2: calculate all accordingly 2 antennas, selects that antenna more standard compliant as the antenna sending data.Wherein, technology as well known to those skilled in the art is belonged to the corresponding calculating that antenna carries out, as user selects certain antenna to calculate correlation factor respectively according to above-mentioned formula (1) or (2) select little that root antenna of correlation factor as the antenna sending data, or respectively to every root sky line computation channel capacity, selective channel that root antenna capacious is as the antenna sending data.
Step 304: base station sends control information to pairing user.
Fig. 4 is the schematic diagram of the control information that in the present invention, base station sends, and as shown in Figure 4, in order to simplified characterization, only relates to the control information about switch mode, comprising in control information:
1st: current multi-antenna transmission mode position.0 represents SU-SIMO/MIMO pattern; 1 represents V-MIMO pattern.
2nd ~ 3: antenna selection mode position.00 represents that base station end does not consider which root antenna user uses carry out data transmission, and antenna selection procedure is determined by user; Or user is only configured with 1 transmit antennas; 01/10 represents that base station notifies that user uses given antenna to carry out transfer of data; 11 represent that user uses 2 antennas to carry out transfer of data.
4th ~ 5: pilot frequency mode position, undetermined.
6th ~ 8: space-time encoding modes position.000 expression does not carry out Space Time Coding; 001 represents STBC coding; 010 represents SFBC coding; 011 represents CDD coding; 100 represent VBLAST coding.Wherein, it should be noted that, when being 1 for the 1st, if line options position, sky is 11, being then considered as 00; If Space Time Coding position is non-000, be then considered as 000.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. realize a method for multi-antenna transmission model selection, it is characterized in that, the method comprises:
The switching needing to carry out multiple antennas access module is determined in base station according to system load amount;
The first user of base station selected Virtual MIMO V-MIMO pattern, and select the pairing user of V-MIMO pattern; Wherein, the first user of described V-MIMO pattern is the non real-time type service-user needing transferring large number of data;
Base station sends control information to adopting the pairing user of V-MIMO pattern;
Wherein, the first user of described selection V-MIMO pattern comprises: although option and installment single user list enters to have more SU-SIMO or is furnished with the first user of user as V-MIMO pattern that 2 antennas adopt SU-SIMO pattern; Or option and installment double antenna also uses single user multiple-input, multiple-output SU-MIMO pattern to send the first user of user as V-MIMO pattern of data.
2. method according to claim 1, is characterized in that, the method also comprises and pre-sets load-threshold value; Describedly determine that the switching needing to carry out multiple antennas access module comprises:
System load amount is learnt by detection in described base station, and when the system load amount obtained is greater than default load-threshold value, determines and need to use V-MIMO pattern.
3. method according to claim 1, is characterized in that, the first user of described V-MIMO pattern is the user adopting bell laboratory layered space-time code BLAST mode; Or,
The first user of described V-MIMO pattern is the user adopting space-time block coding STBC or public number dictionary CDD mode.
4. method according to claim 3, is characterized in that, the first user of described base station selected V-MIMO pattern specifically comprises:
The user of requested service is carried out to the calculating of service priority, and first by user scheduling high for priority in time domain and frequency domain resource;
From the user being assigned to resource, select the first user of V-MIMO pattern, form the first alternative user set { k 1, k 2k n.
5. method according to claim 4, is characterized in that, utilizes poll or proportional dispatching algorithm to realize the calculating of described service priority.
6. method according to claim 1, is characterized in that, described in select the pairing user of V-MIMO pattern method be: adopt and to match the pairing user of algorithms selection V-MIMO pattern based on restricted normalization F norm user.
7. method according to claim 6, is characterized in that, described employing is matched the pairing user of algorithms selection V-MIMO pattern based on restricted normalization F norm user and specifically comprised:
The unallocated user to resource is formed candidate match user set { g 1, g 2g m, for the first alternative user set { k 1, k 2k nin certain user k n, calculated candidate pairing user set { g respectively 1, g 2g min each user g 1, g 2..., g mwith this user k ncorrelation factor wherein, n ∈ [1, N], m ∈ [1, M], n ' ∈ { k nshared subcarrier };
By the mode that multiple subcarrier is averaging, calculate match factor wherein, N ' is user k nand g mshared subcarrier, and work as time, judge that user can match and form V-MIMO pattern; When time, user does not match, process ends; Wherein, ξ thresholdingfor default pairing correlation threshold;
To the user forming V-MIMO pattern can be matched, if user is g mmeet: wherein n ' ∈ { k nshared subcarrier }, then this user g muser k nalternative pairing user; Or, if user is g mmeet: wherein, n ' ∈ { k nshared subcarrier }, then this user g muser k nalternative pairing user;
User k nalternative pairing user form user k nalternative pairing user set { p 1, p 2..., p q, and according to determine user k npairing user
8. method according to claim 7, is characterized in that, described pairing user an antenna is used to send data;
If described pairing user be equipped with 2 antennas, the method also comprises:
Carry out a day line options in advance, select wherein 1 antenna and send data;
Or, 2 antennas are calculated respectively, select a more standard compliant antenna as the antenna sending data.
9. method according to claim 1, is characterized in that, described control information comprises: current multi-antenna transmission mode, antenna selection mode, pilot frequency mode, and space-time encoding modes.
10. realize a device for multi-antenna transmission model selection, it is characterized in that, comprise detection module, first and select module, second to select module and configuration module, wherein,
Detection module, for determining the switching needing to carry out multiple antennas access module according to system load amount, exports to the first selection module, the unallocated user profile to resource is exported to the second selection module by the user profile being assigned to resource;
First selects module, for being assigned to from what receive the first user selecting V-MIMO pattern in the user of resource, and the first user selected is exported to the second selection module; Wherein, the first user of described V-MIMO pattern is the non real-time type service-user needing transferring large number of data;
Second selects module, in the user from the unallocated resource received, selects the pairing user of the V-MIMO pattern of matching with first user, and the user profile that success is matched is exported to configuration module;
Configuration module, for sending its control information to the pairing user of employing V-MIMO pattern;
Wherein said first selects the first user of model choice V-MIMO pattern to comprise: first, although option and installment single user list enters to have more SU-SIMO or is furnished with the first user of user as V-MIMO pattern that 2 antennas adopt SU-SIMO pattern; Or option and installment double antenna also uses single user multiple-input, multiple-output SU-MIMO pattern to send the first user of user as V-MIMO pattern of data.
CN200910089785.3A 2009-07-23 2009-07-23 Method and device for realizing selection of multiple antenna transmission modes Expired - Fee Related CN101965011B (en)

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