CN101400134B - Method for reducing resource allocation overhead - Google Patents
Method for reducing resource allocation overhead Download PDFInfo
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- CN101400134B CN101400134B CN2007101810237A CN200710181023A CN101400134B CN 101400134 B CN101400134 B CN 101400134B CN 2007101810237 A CN2007101810237 A CN 2007101810237A CN 200710181023 A CN200710181023 A CN 200710181023A CN 101400134 B CN101400134 B CN 101400134B
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Abstract
The invention discloses a method of reducing resource assignation spending. The method adopts the technical scheme: a base station divides each user into different levels according to channel condition of different users, modulating the resource assignation information connected with user service in different levels through different modulation mode, mapping to corresponding control channel carrier resources to transmit.
Description
Technical field
The present invention relates to moving communicating field, especially the method for resource assignation in the broadband wireless communication technique field.
Background technology
The down link of next generation mobile communication systems such as LTE (Long Term Evolution Long Term Evolution), UMB (Ultra Mobile Broadband super mobile broadband) and mobile WiMAX is based on the multi-access mode of OFDMA (orthogonal frequency division multiplexing multiple access access), under given system bandwidth, on the angle of frequency domain, different users realizes the purpose that multiple access inserts by the orthogonal sub-carriers resource that takies some.
In said system, the packet that different user connects transmits on certain orthogonal sub-carriers resource, and after customer service connected foundation, the base station needed and will connect the carrier resource information notice travelling carriage that distributes to this business.Usually, above-mentioned resource allocating message sends with fixing modulation coding mode on the carrier resource position of appointment usually.Because channel condition, the variation of base station number of users, base station dispatcher is in the scheduling of resource to every frame, distribute different orthogonal sub-carriers resources can for same connection, so, in the control messages of every frame, the base station needs and will be notified to corresponding mobile station to each professional orthogonal sub-carriers resource information of distributing that connects.The user who under the base station, has a large amount of transmission small data packets, such as VoIP (internet protocol voice technology) user, because the business data packet of actual transmissions is less, indicates the control messages of the resource information of each business packet to occupy a large amount of expenses, has influenced power system capacity greatly.Common reduction resource allocation overhead method plays certain effect by the redundant field in the compressed resource assignment message.The present invention further solves the excessive problem of resource allocating message expense from the angle of control messages modulation coding mode, can further reduce the expense of resource allocating message, improves the capacity of spectrum efficiency and system.
Summary of the invention
The present invention further improves the sector capacity of system in order to reduce the control signaling consumption based on OFDMA mode resource assignation, has proposed a kind of method that can reduce resource allocation overhead.
In order to realize the foregoing invention purpose, the method of the reduction resource allocation overhead that the present invention proposes is by the following technical solutions: the base station is divided into different grades according to the channel condition of different user with each user, with different modulation systems the resource allocating message that the different brackets customer service connects is modulated, and be mapped on the control corresponding channel carrier resource and send.
Method of the present invention, further, the base station is divided into the inferior grade user according to each user's channel condition with each user, inferior high-grade user and highest ranking user.
Method of the present invention, further, the modulation system of low order is adopted in described base station to the resource allocating message of the inferior grade customer service connection of bad channel conditions, the resource allocating message that the general inferior high-grade customer service of channel condition is connected adopts the modulation system of time high-order, and the resource allocating message that the good high-grade customer service of channel condition is connected adopts the modulation system of high-order; Subsequently, the resource allocating message of the different brackets after will modulating successively again is mapped on the carrier resource piece after the control messages of broadcasting and sends.
Method of the present invention further, comprises the modulation coding mode of the professional resource allocating message employing that connects of each class user and the particular location and the size information of the professional resource allocating message that is connected of each class user in the control messages of described broadcasting.
Method of the present invention, further, that send on the Resource Block after stating the control messages of broadcasting is the inferior grade user successively, the resource allocating message that inferior high-grade user is connected with the highest ranking customer service.
Method of the present invention, further, the base station utilizes the carrier/interface ratio of channel as the foundation of judging channel condition.
Description of drawings
Fig. 1 is the transmission position example of resource allocating message on running time-frequency resource of the method for the invention.
Fig. 2 is the realization flow example of the method for the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the method for the invention being described in further detail, is example with the BWA based on the OFDMA standard.
In the broadband access system based on the TDD mode of OFDMA standard, control signaling and business datum all are distributed on the time frequency two-dimensional resources and send.From the angle of frequency domain, each controls signaling and business datum all occupies certain orthogonal sub-carriers resource, and from the angle of time domain, each controls signaling and business datum occupies certain frame length again.Identifying each professional connect the resource allocating message that control messages and business datum on uplink downlink specifically send the position and sends immediately following on the Resource Block after lead code usually.Resource allocating message in the method for the invention be mapped on the time particular location as shown in Figure 1.What the starting position of the shared Resource Block of control messages sent is the control messages of broadcasting, the control messages of this broadcasting adopts the modulation system of QPSK, comprises the modulation coding mode that the resource allocating message of each grade adopts and the particular location and the size information of each grade resource allocating message in the message.What send on the Resource Block after the control messages of broadcasting is through the inferior grade user who modulated without modulation system, the resource allocating message that inferior high-grade user is connected with the highest ranking customer service successively.
Fig. 2 is a kind of realization flow example that reduces the resource allocating message method of the present invention, and the specific implementation step is as follows,
201 are provided with channel condition decision threshold CINR
HAnd CINR
L
202 base stations are with the CINR (carrier/interface ratio) and the CINR of each user feedback
H, CINR
LCompare, with each user's divided rank.
If CINR 〉=CINR
H, then this user is a highest ranking;
If CINR
L＜CINR＜CINR
H, then this user is inferior high-grade;
If CINR≤CINR
L, then this user is an inferior grade.
203 base station dispatchers according to user gradation, are modulated the resource allocating message that the different brackets customer service connects with different modulation systems when handling the control messages that each business is connected:
For low-grade user, adopt the modulation system of QPSK (Quadrature Phase Shift Keying) that the resource allocating message that this customer service connects is modulated;
For inferior high-grade user, adopt the modulation system of 16QAM (16 rank quadrature amplitude modulation) that the resource allocating message that this customer service connects is modulated;
For the user of highest ranking, adopt the modulation system of 64QAM (64 rank quadrature amplitude modulation) that the resource allocating message that this customer service connects is modulated.
204 base stations are mapped in the resource allocating message of the different brackets behind the modulating-coding on the control messages carrier resource successively and send.
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 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 (9)
1. method that reduces resource allocation overhead, it is characterized in that, the base station is divided into different grades according to the channel condition of different user with each user, with different modulation systems the resource allocating message that the different brackets customer service connects is modulated, and be mapped on the control corresponding channel carrier resource and send.
2. method according to claim 1 is characterized in that, the base station is divided into the inferior grade user according to each user's channel condition with each user, inferior high-grade user and highest ranking user.
3. method according to claim 1 and 2, it is characterized in that, the modulation system of low order is adopted in described base station to the resource allocating message of the inferior grade customer service connection of bad channel conditions, the resource allocating message that the general inferior high-grade customer service of channel condition is connected adopts the modulation system of time high-order, and the resource allocating message that the good high-grade customer service of channel condition is connected adopts the modulation system of high-order; Subsequently, the resource allocating message of the different brackets after will modulating successively again is mapped on the carrier resource piece after the control messages of broadcasting and sends.
4. method according to claim 3 is characterized in that, the modulation system of Quadrature Phase Shift Keying is adopted to the resource allocating message that described low-grade customer service connects in the base station; To the resource allocating message of described high-grade customer service connection, adopt the modulation system of 16 rank quadrature amplitude modulation; To the resource allocating message that the customer service of described highest ranking connects, adopt the modulation system of 64 rank quadrature amplitude modulation.
5. method according to claim 3, it is characterized in that, comprise the modulation coding mode of the professional resource allocating message employing that connects of each class user and the particular location and the size information of the professional resource allocating message that is connected of each class user in the control messages of described broadcasting.
6. method according to claim 3 is characterized in that, that send on the carrier resource piece after the control messages of described broadcasting is the inferior grade user successively, the resource allocating message that inferior high-grade user is connected with the highest ranking customer service.
7. method according to claim 3 is characterized in that, the control messages of described broadcasting adopts the modulation system of QPSK.
8. method according to claim 1 and 2 is characterized in that channel condition is judged according to the carrier/interface ratio of channel in the base station.
9. method according to claim 8 is characterized in that, the base station is provided with channel condition decision threshold carrier/interface ratio 1 and carrier/interface ratio 2, and carrier/interface ratio 1 is less than carrier/interface ratio 2; Subsequently, the carrier/interface ratio of user feedback is compared with decision threshold, if the carrier/interface ratio of user feedback is smaller or equal to carrier/interface ratio 1, then this user is an inferior grade, if the carrier/interface ratio of user feedback is greater than carrier/interface ratio 1, less than carrier/interface ratio 2, then this user is inferior high-grade, if the carrier/interface ratio of user feedback is more than or equal to carrier/interface ratio 2, then this user is a highest ranking.
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| CN2007101810237A CN101400134B (en) | 2007-09-26 | 2007-09-26 | Method for reducing resource allocation overhead |
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| CN2007101810237A CN101400134B (en) | 2007-09-26 | 2007-09-26 | Method for reducing resource allocation overhead |
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| CN101400134A CN101400134A (en) | 2009-04-01 |
| CN101400134B true CN101400134B (en) | 2011-03-02 |
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| CN101860967A (en) * | 2009-04-09 | 2010-10-13 | 中兴通讯股份有限公司 | How Group Resource Allocations Are Handled |
| CN103220787A (en) * | 2012-01-19 | 2013-07-24 | 华为技术有限公司 | Control signaling transmission method, user equipment (UE) and base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1378354A (en) * | 2001-03-26 | 2002-11-06 | 株式会社Ntt都科摩 | Self adaptive modulation method and radio controller and mobile communication system |
| CN1667987A (en) * | 2004-03-12 | 2005-09-14 | 上海贝尔阿尔卡特股份有限公司 | Adaptive communicating method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1378354A (en) * | 2001-03-26 | 2002-11-06 | 株式会社Ntt都科摩 | Self adaptive modulation method and radio controller and mobile communication system |
| CN1667987A (en) * | 2004-03-12 | 2005-09-14 | 上海贝尔阿尔卡特股份有限公司 | Adaptive communicating method and device |
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