CN101635990B - Subcarrier distributing method and base station - Google Patents
Subcarrier distributing method and base station Download PDFInfo
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- CN101635990B CN101635990B CN200910189674A CN200910189674A CN101635990B CN 101635990 B CN101635990 B CN 101635990B CN 200910189674 A CN200910189674 A CN 200910189674A CN 200910189674 A CN200910189674 A CN 200910189674A CN 101635990 B CN101635990 B CN 101635990B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 238000013507 mapping Methods 0.000 claims description 4
- 230000006855 networking Effects 0.000 abstract description 7
- 238000013468 resource allocation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
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- 230000005465 channeling Effects 0.000 description 1
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Abstract
The embodiment of the invention provides a subcarrier distributing method and a base station. The method comprises the following steps: respectively distributing two groups of subcarriers to the ith continuous N frame of a first carrier fan and respectively distributing one group of subcarriers to the ith continuous N frame of a second carrier fan; respectively distributing one group of subcarriers to the jth continuous N frame of the first carrier fan and respectively distributing two groups of subcarriers to the jth continuous N frame of the second carrier fan, wherein the i is an even number and the j is an odd number or the i the odd number and the j is the even number; the N is a natural number; and transmitting subcarrier distributing information to a terminal. The subcarrier distributing method and the base station provided by the embodiment of the invention can uniformly distribute the subcarriers on the two carrier fans, thereby solving the problem of uneven resource distribution when FFR is carried out in a scene of networking the two carrier fans in the prior art.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of method, base station of subcarrier allocation.
Background technology
WiMAX (Worldwide Interoperability for Microwave Access), Chinese full name are that the microwave interoperability is inserted in the whole world, are a kind of wireless metropolitan area network technologies based on IEEE 802.16 standards.It is terminal (MS/SS:Mobile Station/Subscriber Station) that the WiMAX network mainly is made up of three parts; Accessing business network (ASN:Access Service Network) comprises base station (BS:Base Station) and accessing business network gate (ASN GW:Access Service Network-GateWay) and is connected service network (CSN:Connectivity Service Network) and comprises prepaid server (PPS:Prepay Server); Authentication; Authorize and accounting server logic entities such as (AAA Server:Authentication Authorization AccountingServer).
In the WiMAX of 5M bandwidth system; The sub-carrier wave distribution method of said 5M bandwidth is: with descending 15 available subchannel be divided into 3 the group group (group0, group1, group2); Wherein each group has 5 subchannel; Be unit with the group when each contained fan Resources allocation, under the scene of 3 contained fan segment networkings, subcarrier allocation then is that the subchannels of said 3 group group are distributed to said 3 contained fans respectively.
The inventor finds; Under the scene of 2 contained fan segment networkings; If 2 contained fans will be realized channeling (FFR:Fractional Frequency Reuse), then its carrier allocation method is for one of them contained fan distributes 2 group (i.e. 10 subchannel), for another contained fan distributes 1 group (i.e. 5 subchannel); But such distribution can cause the unbalanced of between said 2 contained fans resource allocation.
Summary of the invention
This embodiment of the invention provides a kind of method, base station of subcarrier allocation, to solve in the prior art the unbalanced problem of resource allocation under the scene of two contained fan networkings.
The method of a kind of subcarrier allocation that the embodiment of the invention provides is specially:
I the N continuous frame that is first contained fan distributes 2 groups of subcarriers respectively, is that i N continuous frame of second contained fan distributes 1 group of subcarrier respectively;
For j N continuous frame of said first contained fan distributes 1 group of subcarrier respectively, for j N continuous frame of said second contained fan distributes 2 groups of subcarriers respectively;
Wherein, said i is that even number, j are odd number, or i is that odd number, j are even number, and N is a natural number;
Send subcarrier allocation information to the terminal.
A kind of base station that the embodiment of the invention provides comprises:
Sub-carrier assignment module: i the N continuous frame that is used to first contained fan distributes 2 groups of subcarriers respectively, is that i N continuous frame of second contained fan distributes 1 group of subcarrier respectively; For j N continuous frame of said first contained fan distributes 1 group of subcarrier respectively, for j N continuous frame of said second contained fan distributes 2 groups of subcarriers respectively; Wherein, said i is that even number, j are odd number, or i is that odd number, j are even number, and N is a natural number;
Transport module: be used for sending the subcarrier allocation information that said sub-carrier assignment module is confirmed to the terminal.
The another kind of sub-carrier wave distribution method that the embodiment of the invention provides comprises:
Be that first contained fan and second contained fan dispose two regional zone respectively;
For first zone of said first contained fan distributes 2 groups of subcarriers; For second zone of said first contained fan distributes 1 group of subcarrier; Then for first zone of said second contained fan distributes 1 group of subcarrier, for second zone of said second contained fan distributes 2 groups of subcarriers; Or
For first zone of said first contained fan distributes 1 group of subcarrier; For second zone of said first contained fan distributes 2 groups of subcarriers; Then for first zone of said second contained fan distributes 2 groups of subcarriers, for second zone of said second contained fan distributes 1 group of subcarrier.
The another kind of base station that the embodiment of the invention provides comprises:
Area configurations module: be that first contained fan and second contained fan dispose two regional zone respectively;
Sub-carrier assignment module: for first zone of said first contained fan distributes 2 groups of subcarriers; For second zone of said first contained fan distributes 1 group of subcarrier; Then for first zone of said second contained fan distributes 1 group of subcarrier, for second zone of said second contained fan distributes 2 groups of subcarriers; Or distribute 1 group of subcarrier for first zone of said first contained fan; For second zone of said first contained fan distributes 2 groups of subcarriers; Then for first zone of said second contained fan distributes 2 groups of subcarriers, for second zone of said second contained fan distributes 1 group of subcarrier.
Method, the base station of the subcarrier allocation that provides through the embodiment of the invention can be implemented on said two contained fans allocation of subcarriers uniformly, thereby solve the uneven problem of resource allocation when under the scene of two contained fan networkings, carrying out FFR in the prior art.
Description of drawings
The flow chart of a kind of sub-carrier wave distribution method that Fig. 1 embodiment of the invention provides;
Fig. 2 carries out the sketch map of subcarrier allocation for what the embodiment of the invention provided according to Fig. 1;
The structural representation of a kind of base station that Fig. 3 provides for the embodiment of the invention;
The flow chart of a kind of sub-carrier wave distribution method that Fig. 4 provides for the embodiment of the invention;
Fig. 5 carries out the sketch map of subcarrier allocation for what the embodiment of the invention provided according to Fig. 4;
The structural representation of a kind of base station that Fig. 6 provides for the embodiment of the invention.
Embodiment
For the purpose that makes the embodiment of the invention, technical scheme and advantage express clearer, specify the technical scheme that the embodiment of the invention provides below in conjunction with specific embodiment and accompanying drawing.
The embodiment of the invention provides a kind of sub-carrier wave distribution method; When using 2 contained fans to realize FFR; Can be described 15 number of sub-carrier consecutive means to be distributed to described 2 contained fans use; Be that example is elaborated on contained fan A, contained fan B, to realize FFR, to carry out transfer of data below; When said contained fan A, the enterprising data transfer of contained fan B, be said contained fan A, contained fan B mean allocation subcarrier dynamically, as can being that the first N continuous frame for said contained fan A distributes 2 groups of subcarriers respectively, distributes 1 group of subcarrier respectively for the first N continuous frame of said contained fan B; And then distribute 1 group of subcarrier respectively, distribute 2 groups of subcarriers respectively for the second N continuous frame of said contained fan B for the second N continuous frame of said contained fan A; The dynamic assignment of subcarrier so hockets; Promptly can be that odd number N continuous frame for said contained fan A distributes 2 groups of subcarriers; For the even number N continuous frame of said contained fan A distributes 1 group of subcarrier; For the odd number N continuous frame of said contained fan B distributes 1 group of subcarrier, for the even number N continuous frame of said contained fan B distributes 2 groups of subcarriers; Certainly; Also can be that odd number N continuous frame for said contained fan A distributes 1 group of subcarrier; For the even number N continuous frame of said contained fan A distributes 2 groups of subcarriers; For the odd number N continuous frame of said contained fan B distributes 2 groups of subcarriers, for the even number N continuous frame of said contained fan B distributes 1 group of subcarrier; Here, N is a natural number, and the value of N can be carried out flexible configuration according to the type of data service or the needs of operator.The base station sends to the terminal with the assignment information of said subcarrier after distributing subcarrier for the frame on the contained fan, then said terminal receives business datum according to its assignment information that receives on respective sub.Like this,, can be implemented in uniform allocation of subcarriers on said two contained fans, thereby solve the uneven problem of resource allocation when under the scene of two contained fan networkings, carrying out FFR in the prior art through dynamically alternately being said contained fan A, contained fan B allocation of subcarriers.
As shown in Figure 1, the embodiment of the invention provides a kind of method of subcarrier allocation, in the present embodiment, is 1 to be that example is elaborated with the N value, promptly when carrying out subcarrier allocation, is each frame dynamic assignment subcarrier all on two contained fans, and is specific as follows:
Step 100: the first frame allocation of subcarriers that is respectively two contained fans.
In the embodiment of the invention; When carrying out transfer of data, can be each the frame allocation of subcarriers in said two contained fans dynamically, be that example describes with contained fan A, contained fan B; Can distribute 2 groups of subcarriers for first frame of contained fan A, for first frame of contained fan B distributes 1 group of subcarrier; Certainly, also can be that first frame for contained fan A distributes 1 group of subcarrier, for first frame of contained fan B distributes 2 groups of subcarriers.
Step 101: issue subcarrier allocation information.
Can be frame prefix at said frame, like DL_Data_Prefix, in carry said subcarrier allocation information, specifically can be to carry said subcarrier allocation information through the used subchannel bitmap field among the said DL_Data_Prefix.According to said subcarrier allocation situation; In the used subchannel bitmap field among the DL_Data_Prefix of first frame of said contained fan A 2 bit values being arranged is 1, and in the used subchannel bitmap field among the DL_Data_Prefix of first frame of said contained fan B 1 bit value being arranged is 1.As shown in table 1 below, be the structure of DL_Data_Prefix:
| Syntax | Size | notes |
| ?(bit) | ||
| DL_Frame_Prefix_Format(){ | ?- | - |
| used?subchannel?bitmap | ?6 | Bit#0:Subchannel?0 Bit#1:Subchannel?1 Bit#2:Subchannel?2 Bit#3:Subchannel?3 Bit#4:Subchannel?4 Bit#5:Subchannel?5 |
| Reserved | ?1 | Shall?be?set?to?zero |
| Repetition_Coding_Indication | ?2 | 0b00:no?repletion?coding?on?DL?MAP； 0b01:Rep1etion?coding?of?2?used?on?DL?MAP 0b10:Repletion?coding?of?4?used?on?DL?MAP 0b11:Repletion?coding?of?6?used?on?DL?MAP |
| Coding_Indication | ?3 | 0b000:CC encoding used on DL MAP 0b001:BTC encoding used on DL MAP 0b010:CTC encoding used on DL MAP 0b011:ZT CC encoding used on DL MAP 0b100:CC encoding with optional interleaver 0b101:LDPC encoding used on DL MAP； 0b110 to 0b111:Reserved |
| DL-Map_Length | ?8 | - |
| Reserved | ?4 | Shall?be?set?to?zero |
| } | - |
Table 1
Said DL_Data_Prefix is mapped to FCH and is handed down to the terminal, and then said terminal receives said DL_Data_Prefix and parses the subcarrier information of on corresponding contained fan, distributing, and on respective sub, receives data.
Step 102: the next frame allocation of subcarriers that is respectively said two contained fans.
Here; During for the next frame allocation of subcarriers of said two contained fans; Distribution principle is following: if the former frame of contained fan A has been distributed 2 groups of subcarriers, then distribute 1 group of subcarrier for said next frame, if the former frame of contained fan A has been distributed 1 group of subcarrier; Then distribute 2 groups of subcarriers for said next frame, contained fan B is like this too.
Therefore since in step 100 for first frame of said contained fan A has distributed 2 groups of subcarriers, think that second frame of said contained fan A distributes 1 group of subcarrier, in like manner, for second frame of contained fan B distributes 2 groups of subcarriers.
Step 103: issue subcarrier allocation information.
Carrying the subcarrier allocation situation of this frame and be handed down to the terminal through frame prefix DL_Data_Prefix, return step 102, so repeat, is each frame allocation of subcarriers of said two contained fans dynamically.Referring to Fig. 2, be the sketch map of actual sub-carriers distribution.The embodiment of the invention is not limited to be each frame dynamic assignment subcarrier separately all; Can also be to distribute once for every N continuous frame dynamically; Like N value 2,3,4 ... Deng, the concrete value of N can be carried out flexible configuration according to the type of data service or the needs of operator.
Can realize said two contained fan uniform distribution subcarriers like this, to solve the problem of prior art sub-carriers maldistribution.
The embodiment of the invention provides a kind of base station; As shown in Figure 3; This base station comprises sub-carrier assignment module 300, transport module 302; I the N continuous frame that described sub-carrier assignment module 300 is used to first contained fan distributes 2 groups of subcarriers respectively, is that i N continuous frame of second contained fan distributes 1 group of subcarrier respectively; For j N continuous frame of said first contained fan distributes 1 group of subcarrier respectively, for j N continuous frame of said second contained fan distributes 2 groups of subcarriers respectively; Wherein, said i is that even number, j are odd number, and N is a natural number, in the present embodiment, also can be that said i is an odd number, and j is an even number; Said transport module 302 is used for sending to the terminal subcarrier allocation information of said sub-carrier assignment module.Like this, the base station sends to the terminal with the assignment information of said subcarrier after distributing subcarrier for the frame on the contained fan, and then said terminal receives business datum according to its assignment information that receives on respective sub.Like this; Through dynamically alternately being said first contained fan and the second contained fan allocation of subcarriers; Can be implemented in uniform allocation of subcarriers on said two contained fans, thereby solve the uneven problem of resource allocation when under the scene of two contained fan networkings, carrying out FFR in the prior art.Here, the value of N can be carried out flexible configuration according to the type of data service or the needs of operator.When the N value is 1; Be equivalent to be all dynamic allocation of subcarriers of each frame of said two contained fans, as be that the even frame of first contained fan is distributed 2 groups of subcarriers, for its odd-numbered frame is distributed 1 group of subcarrier; The even frame that is second contained fan is distributed 1 group of subcarrier, for its odd-numbered frame is distributed 2 groups of subcarriers.
Further, said transport module 302 comprises the message constructing module, mapping block and sending module, and here, said message constructing module is used to construct the frame prefix of said frame, in said frame prefix, carries said subcarrier allocation information; Said mapping block is used for the frame prefix of said message constructing module structure is mapped to forward channel FCH; Said sending module is used for the said frame prefix that is mapped to forward channel FCH is sent to the terminal.
In the present embodiment; Said message constructing module can be the frame prefix at said frame; Like DL_Data_Prefix; In carry said subcarrier allocation information, as carrying said subcarrier allocation information through the used subchannel bitmap field among the said DL_Data_Prefix, specifically can be with reference to the associated description of Fig. 1 step 101.After then said mapping block was mapped to forward channel FCH with the frame prefix of said message constructing module structure, said sending module sent to the terminal with the said frame prefix that is mapped to forward channel FCH.
The embodiment of the invention also provides the method for another kind of subcarrier allocation, in the present embodiment, can take multizone zone configuration to two contained fans, can realize the uniform distribution of two contained fan resources like this through scheduling of resource, and is specific as follows:
Step 400: be that two contained fans dispose two zone respectively.
In the present embodiment, can be to be respectively two zone of two contained fans (like contained fan A, contained fan B) configuration, the type of first zone of said two contained fans be PUSC (partial used Sub channel: part is used subcarrier).The type of second zone of said two contained fans can be PUSC with all sc or FUSC or BAND AMC.Specifically when carrying out the zone division, for first zone of said two contained fans, its size is as the criterion for the MAP that takies one group of subcarrier, and is specifically as shown in Figure 5.
Step 401: be two zone allocation of subcarriers of said two contained fans.
In the present embodiment, can distribute 2 groups of subcarriers, then distribute 1 group of subcarrier for second zone of said contained fan A for first zone of said contained fan A; For first zone of said contained fan B distributes 1 group of subcarrier, for second zone of said contained fan B distributes 2 groups of subcarriers; Certainly, also can be that first zone for said contained fan A distributes 1 group of subcarrier, then distribute 2 groups of subcarriers for second zone of said contained fan A; For first zone of said contained fan B distributes 2 groups of subcarriers, for second zone of said contained fan B distributes 1 group of subcarrier.
Like this, through being two regional zone dynamic assignment subcarriers on two contained fans dynamically, can realize the resource mean allocation when two contained fans are realized FFR under the 5M bandwidth.
As shown in Figure 6, the embodiment of the invention also provides a kind of base station, and this base station comprises area configurations module 600 and sub-carrier assignment module 602, and wherein, said area configurations module 600 is used to first contained fan and second contained fan disposes two regional zone respectively; Said sub-carrier assignment module 602 is used to two zone allocation of subcarriers of said first contained fan and second contained fan; As can be that first zone for said first contained fan distributes 2 groups of subcarriers; For second zone of said first contained fan distributes 1 group of subcarrier; For first zone of said second contained fan distributes 1 group of subcarrier, for second zone of said second contained fan distributes 2 groups of subcarriers; Certainly; Also can be that first zone for said first contained fan distributes 1 group of subcarrier; For second zone of said first contained fan distributes 2 groups of subcarriers, for first zone of said second contained fan distributes 2 groups of subcarriers, for second zone of said second contained fan distributes 1 group of subcarrier.
Further; Said area configurations module also comprises area type configuration submodule and area size configuration submodule, and wherein said area type configuration submodule is used for first zone of said first contained fan and second contained fan is configured to part use subcarrier zone PUSC zone; Second zone of said first contained fan and second contained fan is configured to FUSC zone or PUSC with all sc zone or BAND AMC zone; The size configure that said area size configuration submodule is used for first zone of said first contained fan and second contained fan is the MAP that takies one group of subcarrier.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; This program comprises the steps: when carrying out
I the N continuous frame that is first contained fan distributes 2 groups of subcarriers respectively, is that i N continuous frame of second contained fan distributes 1 group of subcarrier respectively;
For j N continuous frame of said first contained fan distributes 1 group of subcarrier respectively, for j N continuous frame of said second contained fan distributes 2 groups of subcarriers respectively;
Wherein, said i is that even number, j are odd number, and N is a natural number;
Send subcarrier allocation information to the terminal.Comprise the steps:
Be that first contained fan and second contained fan dispose two regional zone respectively;
For first zone of said first contained fan distributes 2 groups of subcarriers; For second zone of said first contained fan distributes 1 group of subcarrier; For first zone of said second contained fan distributes 1 group of subcarrier, for second zone of said second contained fan distributes 2 groups of subcarriers.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (5)
1. sub-carrier wave distribution method is characterized in that:
I the N continuous frame that is first contained fan distributes 2 groups of subcarriers respectively, is that i N continuous frame of second contained fan distributes 1 group of subcarrier respectively;
For j N continuous frame of said first contained fan distributes 1 group of subcarrier respectively, for j N continuous frame of said second contained fan distributes 2 groups of subcarriers respectively;
Wherein, said i is that even number, j are odd number, or i is that odd number, j are even number, and N is a natural number;
Send subcarrier allocation information to the terminal.
2. the method for claim 1 is characterized in that, saidly sends subcarrier allocation information to the terminal and is specially:
In the frame prefix of said frame, carry subcarrier allocation information;
Said frame prefix is mapped to forward channel, sends to the terminal.
3. method as claimed in claim 2 is characterized in that, the said subcarrier allocation information of in the frame prefix of said frame, carrying is specially:
In the used subchannel bitmap field of the frame prefix DL_Data_Prefix of said frame, carry said subcarrier allocation information.
4. base station is characterized in that:
Sub-carrier assignment module: i the N continuous frame that is used to first contained fan distributes 2 groups of subcarriers respectively, is that i N continuous frame of second contained fan distributes 1 group of subcarrier respectively; For j N continuous frame of said first contained fan distributes 1 group of subcarrier respectively, for j N continuous frame of said second contained fan distributes 2 groups of subcarriers respectively; Wherein, said i is that even number, j are odd number, or i is that odd number, j are even number, and N is a natural number;
Transport module: be used for sending the subcarrier allocation information that said sub-carrier assignment module is confirmed to the terminal.
5. base station as claimed in claim 4 is characterized in that: said transport module comprises:
Message constructing module: be used to construct the frame prefix of said frame, in said frame prefix, carry said subcarrier allocation information;
Mapping block: be used for the frame prefix of said message constructing module structure is mapped to forward channel;
Sending module: be used for the said frame prefix that is mapped to forward channel is sent to the terminal.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1718096A1 (en) * | 2005-04-25 | 2006-11-02 | Samsung Electronics Co., Ltd. | Indicating the frame offset of Multicast Broadcast Service data bursts in an MBS-MAP message |
| CN1885752A (en) * | 2005-06-20 | 2006-12-27 | 华为技术有限公司 | Multi-cell frequency multiplex realizing method |
| CN101400064A (en) * | 2007-09-24 | 2009-04-01 | 中兴通讯股份有限公司 | Region partitioning method in OFDM system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1718096A1 (en) * | 2005-04-25 | 2006-11-02 | Samsung Electronics Co., Ltd. | Indicating the frame offset of Multicast Broadcast Service data bursts in an MBS-MAP message |
| CN1885752A (en) * | 2005-06-20 | 2006-12-27 | 华为技术有限公司 | Multi-cell frequency multiplex realizing method |
| CN101400064A (en) * | 2007-09-24 | 2009-04-01 | 中兴通讯股份有限公司 | Region partitioning method in OFDM system |
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