CN100471338C - Resource allocation method and system - Google Patents
Resource allocation method and system Download PDFInfo
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- CN100471338C CN100471338C CNB200610083536XA CN200610083536A CN100471338C CN 100471338 C CN100471338 C CN 100471338C CN B200610083536X A CNB200610083536X A CN B200610083536XA CN 200610083536 A CN200610083536 A CN 200610083536A CN 100471338 C CN100471338 C CN 100471338C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
本发明公开了一种资源指配方法，包括以下步骤：第一步骤，接入网向接入终端发送第一消息，其中，第一消息中携带有推进信息，推进信息进一步包括指示信息，用于指示所述接入网是否使用资源推进的方式来指配资源，并且可选的包括资源推进策略信息，用于指示接入终端以何种推进方式来传输数据；以及第二步骤，如果指示信息指示接入网使用资源推进的方式来指配资源，则接入端将按照资源推进策略来传输数据。本发明还提供了一种资源指配系统。通过以上技术方案，本发明实现了以下有益效果：在应用H-ARQ技术保证传输性能的同时，降低了传输延迟，从而了满足时延敏感业务的传输要求。
The present invention discloses a resource assignment method, which includes the following steps: first step, the access network sends a first message to the access terminal, wherein, the first message carries push information, and the push information further includes instruction information, using To indicate whether the access network assigns resources in the way of resource boosting, and optionally includes resource boosting policy information, which is used to instruct the access terminal to use the boosting mode to transmit data; and the second step, if indicated The information instructs the access network to assign resources in a resource push manner, and the access end will transmit data according to the resource push strategy. The invention also provides a resource assignment system. Through the above technical solutions, the present invention achieves the following beneficial effects: while applying the H-ARQ technology to ensure the transmission performance, the transmission delay is reduced, thereby meeting the transmission requirements of time-delay-sensitive services.
Description
Technical field
The present invention relates to the communications field, and more particularly, relate to a kind of resource allocation method and system, it can be applied to such as based on the wireless access system of OFDMA, based on the wireless access system of CDMA and based on wireless access system of TDMA etc.
Background technology
At present, the 3G mobile communication technology is ripe gradually commercial, and 3GPP2 CDMA20001XEV-DO can further provide competitive wireless access system in the coming years.But want to keep following 10 years or the competitiveness in decades, need to introduce new wireless access technology.At present industry is reached preliminary unanimity with regard to the technology of the eating dishes without rice or wine evolution of 3GPP2, promptly is divided into two stages to carry out, and the stage one is adopted the multi-carrier EV-DO technology, more consider compatible, the evolution items of short-term just; Second stage is to introduce more advanced technology, such as OFDM technology, MIMO technology or the like, can improve the spectrum efficiency and the peak rate of wireless access system greatly, is the evolution plan of 3GPP2 standard long-term.
Traditional multicarrier modulation system is that high-speed data-flow is formed the data flow of a plurality of low speed by serial to parallel conversion, and then distinguishes the carrier wave of modulated response, thereby constitutes the parallel transmission system that sends of a plurality of low-rate datas.Wherein a plurality of carrier waves that are used to modulate show as a plurality of nonoverlapping frequencies on frequency band.
The OFDM technology is a kind of special multi-carrier modulation technology, have between each frequency 1/2 overlapping, but keep mutually orthogonal, receiving terminal can by the correlation demodulation technical point from, constitute data transmission system more efficiently.The OFDM technology can improve spectrum efficiency greatly, utilizes the DSP hardware of FFT and IFFT to realize simultaneously, can simplify the realization of ofdm system greatly.Ofdm system can also reduce intersymbol interference in addition, makes full use of frequency selectivity.Because the plurality of advantages of OFDM technology is so the OFDM technology is widely used at present.
The OFDMA system utilizes the OFDM technology to do multiplex technique, promptly by distributing different data frequencys to distinguish different users to different user.Because transfer of data is used different mutually orthogonal frequencies between the user, so transfer of data can the phase mutual interference between the user.And when frequency is distributed, can be fully reliable this user's wireless environment situation, make full use of frequency selectivity, distribute the data frequency of the most suitable transmission to the user, by the allocation schedule optimization Algorithm, can be so that power system capacity improves.
At existing employing H-ARQ (hybrid automatic request, the automatic request of mixing) in the OFDMA system of technology, for example, insert in standard 802.20 systems at the WiMAX that QualCom company proposes, for the multiplexing OFDMA that all is based on of the transmission of data, during promptly each the transmission, by Radio Access Network (being designated hereinafter simply as AN) to wireless access terminal (being designated hereinafter simply as AT) Resources allocation, each AT uses the resource (for example, data frequency) of distributing to oneself to carry out data-modulated and sends (reverse data transmission) and demodulate reception (forward data transmission).In same sector, each AT uses different frequency resources, has guaranteed the orthogonality of transmission, makes that the transfer of data between the user can the phase mutual interference.Simultaneously, in the preceding rl transmission of 802.20 systems, all used the H-ARQ technology, be transmitted as example with forward direction, system with the physical layer frame is unit of transfer and dispatching cycle, and is as shown below:
The whole transmission time of system is divided into 6 interlace (interlacing), i.e. interlace0, interlace1, interlace2, interlace3, interlace4 and interlace5.Wherein, the Interlace call number equals frame number to 6 deliverys.Same interlace is all used in each transmission of same packet, for example, after the moment 0 has sent packet, if AT can not be correctly decoded, then AT can send NAK (wrong responses) constantly at frame 3 and give AN, afterwards, AN will send re-transmitting data block in 6 moment (remaining interlace0) of frame, and AT will decode again, if still can not be correctly decoded, then AN will constantly send re-transmitting data block at frame 12, so repeatedly, can be correctly decoded up to AT.If reached maximum retransmission (maximum retransmission is generally by the AN decision), and AT can not be correctly decoded still, then AT can report erroneous packets to indicate to the upper strata.The maximum transmission times of stipulating in 802.20 systems is 6 times.If AT is correctly decoded, then can give AN feeding back ACK (correctly replying), then system can reschedule and send new data packets on same interlace.It is because each transmission packet and wait-for-response all have certain delay that system is divided into a plurality of interlace, send packet or send other packets to same user for other users at timing period.In 802.20 systems, after AN is the AT Resources allocation at every turn, AN will send data for this AT modulates on the frequency resource of assignment, if AT requires to retransmit, then AN will modulate on same frequency resource and send retransmission packet, and can not change resource.Each packet transmits for the first time and the packet of subsequent retransmission all is called the subdata bag of this packet, if maximum transmission times is 6, then each packet can transmit 6 sub data packets at most: subdata bag 0～subdata bag 5.Roughly process is consistent with the forward direction transmission during reverse transfer, is that AN receives by AT transmission data.
In 802.20 systems, AN carries out assignment by the F-SSCH channel to resource.AN will distribute to information package such as the resource, packet transmissions form of AT and give AT by the F-SSCH Channel Transmission, and AT decoding F-SSCH channel carries out transfer of data and reception according to the resource information of assignment then.Article one, typical forward direction resource allocating message form is as follows:
| MACID | User totem information |
| NodeID | The resource identification that distributes |
| PF | The data packet transmission form |
| Duration | The assignment duration |
| Extended?Transmission | Whether the long frame of expansion transmits |
Yet, along with the raising of people to the different business demand, need the increasing type of service of wireless access system support, these different business are embodied in different business and have different QoS (Quality of Service, quality of service) demand the requirement difference of throughput, time delay etc., very sensitive such as the VoIP business to time delay, throughput is required not quite, and ftp business is then insensitive to time delay, requires but very high to throughput.So in wireless access system, need different types of service is satisfied their different QoS demand as much as possible.802.20 wireless broadband access systems based on the OFDMA transfer of data have been mentioned in the front, system applies H-ARQ technology, when carrying out data re-transmission, still use the frequency resource transmission of assignment when transmitting first, maximum transmission times is 6, can estimate that then the maximum delay that receives a packet can reach 5 * 5.5 milliseconds=27.5 milliseconds (promptly reaching maximum retransmission just can be correctly decoded), wherein 5.5 milliseconds is that a sub data packets is transferred to destination, destination is decoded and echoed should, arrive the time that the source end retransmits to be needed again, i.e. the time interval of frame 0～frame 5 among the figure.27.5 the Data Receiving time delay of millisecond obviously can not satisfy qos requirement for some delay sensitive business (for example business such as VoIP, Video and game on line).These delay sensitive business are for delay requirement is very strict end to end, so will reduce transmission delay as much as possible in the wireless access side.And if existing 802.20 systems carry out transfer of data according to maximum retransmission, the time delay of introducing can not satisfy delay requirement.And also there is similar problem in other the wireless access system based on OFDMA,, can improve transmission performance though H-ARQ retransmits that is, improves error correcting capability, can bring transmission delay, influences the transmission of delay sensitive business.
Therefore, need a kind of resource allocation method and system, it can reduce transmission delay when using H-ARQ technique guarantee transmission performance, thereby satisfies the transmission requirement of delay sensitive business.
Summary of the invention
Consider the problems referred to above and make the present invention.The invention provides a kind of resource allocation method and resource allocation system, it can be when using H-ARQ technique guarantee transmission performance, reduce transmission delay, and then satisfy the transmission requirement of delay sensitive business, go for such as wireless access system based on the OFDMA technology.
According to an aspect of the present invention, provide a kind of resource allocation method.
Resource allocation method according to the present invention may further comprise the steps: first step, Access Network sends first message to accessing terminal, wherein, carry propulsion information in first message, further contain indication information in the propulsion information, the mode that is used to indicate Access Network whether to use resource to advance is come assigned resources; And second step, if the mode that indication information indication Access Network uses resource to advance is come assigned resources, then access terminal and will advance strategy to transmit data according to resource.
Wherein, first message can be assignment message.
In addition, resource advances policy information can be included in the propulsion information, and this resource propelling strategy of making an appointment that also can and access terminal by Access Network is used for indication and accesses terminal which kind of propulsion mode to transmit data with.
Especially, the indication information that contains in the propulsion information can only use 1 bit (0 or 1) to represent, and when containing resource propelling policy information in the propulsion information, can represent that different resources advances strategy (that is resource propulsion mode) with different number of bits.
In addition, above-mentioned resource includes but not limited to frequency resource, power resource, time interval resource or spatial domain resource, and it can be any one or its combination in any in the above-mentioned various resource.Especially, when resource was frequency resource, resource advanced strategy to may be prescribed as the more frequency resource of plurality of sub allocation of packets that begins to transmit of packet; When resource is power resource, the subdata that begins to transmit that resource advances strategy the to may be prescribed as packet more power resource that is responsible for assigning; When resource is time interval resource, the subdata that begins to transmit that resource advances strategy the to may be prescribed as packet more time interval resource that is responsible for assigning; And when resource was the spatial domain resource, resource propelling strategy can be defined in when carrying out the data transmission, and a plurality of subdata bags with packet are put into transmission simultaneously on the different antennas respectively.
In addition, Access Network can be based on the wireless access network of OFDMA, based on the wireless access network of CDMA and based in the wireless access network of TDMA any one.
According to a further aspect in the invention, provide a kind of resource allocation system.
Resource allocation system according to the present invention comprises: message transmission module, send first message, wherein, carry propulsion information in first message, propulsion information further comprises indication information, and the mode that is used to indicate Access Network whether to use resource to advance is come assigned resources; And data transmission module, in response to first message, come under the situation of assigned resources in the mode that indication information indication Access Network uses resource to advance, advance strategy to transmit data according to resource.
Wherein, first message can be assignment message.
In addition, resource advances policy information can be included in the propulsion information, and this resource propelling strategy of making an appointment that also can and access terminal by Access Network is used for indication and accesses terminal which kind of propulsion mode to transmit data with.
Especially, the indication information that contains in the propulsion information can only use 1 bit (0 or 1) to represent, and when containing resource propelling policy information in the propulsion information, can represent that different resources advances strategy (that is resource propulsion mode) with different number of bits.
In addition, above-mentioned resource includes but not limited to frequency resource, power resource, time interval resource or spatial domain resource, and it can be any one or its combination in any in the above-mentioned various resource.Especially, when resource was frequency resource, resource advanced strategy to may be prescribed as the more frequency resource of plurality of sub allocation of packets that begins to transmit of packet; When resource is power resource, the subdata that begins to transmit that resource advances strategy the to may be prescribed as packet more power resource that is responsible for assigning; When resource is time interval resource, the subdata that begins to transmit that resource advances strategy the to may be prescribed as packet more time interval resource that is responsible for assigning; And when resource was the spatial domain resource, resource propelling strategy can be defined in when carrying out the data transmission, and a plurality of subdata bags with packet are put into transmission simultaneously on the different antennas respectively.
In addition, Access Network can be based on the wireless access network of OFDMA, based on the wireless access network of CDMA and based in the wireless access network of TDMA any one.
By above technical scheme, the present invention has realized following beneficial effect: when using H-ARQ technique guarantee transmission performance, reduced transmission delay, thereby satisfy the transmission requirement of delay sensitive business.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart that illustrates according to the resource allocation method of first embodiment of the invention;
Fig. 2 illustrates the schematic diagram that advances strategy according to the resource of first embodiment of the invention; And
Fig. 3 is the block diagram that illustrates according to the resource propulsion system of third embodiment of the invention.
Embodiment
Hereinafter with reference to accompanying drawing the preferred embodiments of the present invention are described.
First embodiment
In step S102, AN sends assignment message (first message) to AT, wherein, carry propulsion information in the assignment message, and further contain indication information and resource in the propulsion information and advance policy information, wherein, the mode whether indication information is used to indicate AN to use resource to advance is come assigned resources, and resource advances policy information to be used to indicate AT which kind of propulsion mode to transmit data with;
Wherein, the structure of assignment message is as shown below:
| MACID | User totem information |
| NodeID | The resource identification that distributes |
| PF | The data packet transmission form |
| Duration | The assignment duration |
| Extended?Transmission | Whether the long frame of expansion transmits |
| Boost | Whether advance |
Especially, can use 1 bit (0 or 1) to represent indication information, for example, when indication information was 1, the mode that indication AN uses resource to advance was come assigned resources, otherwise when indication information was 0, the mode of then indicating AN not use resource to advance was come assigned resources; Simultaneously, can after this 1 bit, use other bit to represent that resource advances policy information, obviously, resource advances policy information detailed more, and control procedure will be accurate more, for example, under the situation that frequency resource advances, can use 3 bits to represent the resource propulsion information, preceding 2bits carries resource and advances point (0～3), back 1bit carry strategy (=0 o'clock, will reduce the frequency resource 1/2 of frequency resource to original allocation; , will increase frequency resource at=1 o'clock) to 2 times of the frequency resources of original allocation.For those AT (that is, indication information is 0 o'clock) that does not need resource to advance, the indication information that only need be resolved to 1 bit does not just need to continue to resolve the propulsion information of back again.
Next, in step S104, use the mode of resource propelling to come under the situation of assigned resources (that is, indication information=1) at indication information indication AN, AT advances strategy to transmit data according to resource.
Above-mentioned technical scheme can not increase too big to the whole Overhead of system, but but can improve greatly for qos requirement than higher performance of services.
Above-mentioned resource includes but not limited to frequency resource, power resource, time interval resource or spatial domain resource, and it can be any one or its combination in any in the above-mentioned various resource; And Access Network can be based on the wireless access network of OFDMA, based on the wireless access network of CDMA and based in the wireless access network of TDMA any one.
For example, as shown in Figure 2, in resource is under the situation of frequency resource, in wireless access system based on the OFDMA technology, at just at the AT of propagation delay time sensitive traffic, AN is when carrying out frequency resource allocation, can be according to the quality of wireless channel of this AT, the power capability of QoS of survice priority and AT, be the subdata of this each packet of AT different frequency resource that is responsible for assigning, generally, more frequency resources can be responsible for assigning for the several subdatas that begin to transmit, be the subdata of transmitting the later less frequency resource that is responsible for assigning, because the subdata more resources that is responsible for assigning of beginning then can be transmitted the more data package informatin, the probability that is correctly decoded of data receiver has increased greatly so, transmission that can premature termination H-ARQ, the receive time delay of packet just has been lowered like this, that is to say to be the subdata that begins the to transmit more resources that is responsible for assigning, and can improve data and finish the probability that transmits in advance.
Second embodiment
The resource allocation method and first embodiment according to second embodiment of the invention are similar, and its difference is, does not comprise resource and advance policy information in propulsion information.In the present embodiment, resource advances strategy to be made an appointment by AN and AT, therefore need not to comprise resource again and advance policy information in propulsion information.
For example, be under the situation of power resource in resource, AN and AT can arrange the through-put power of each subdata bag when call setup and in the calling procedure, and be as follows:
| Subdata bag 0 | Power XX |
| Subdata bag 1 | Power XX |
| Subdata bag 2 | Power YY |
| Subdata bag 3 | Power YY |
Actual power configuration strategy depends on the purpose of the HARQ premature termination of power capability that AT can support, professional QoS performance and hope can draw some representative values by test.If the strategy that adopts power resource to advance when later on each AT carries out transfer of data, will be launched according to the performance number of configuration, reach the purpose that power advances, AN also can estimate the power that receives better to carry out channel estimating.
Except above aspect, second embodiment and first embodiment are roughly the same, therefore, for unnecessary makes the present invention unclear, will omit being repeated in this description same section.
The 3rd embodiment
Hereinafter with reference to Fig. 3 the third embodiment of the present invention is described.
As shown in Figure 3, resource allocation system 300 according to second embodiment of the invention comprises: message transmission module 302, send assignment message (first message), wherein, carry propulsion information in the assignment message, propulsion information further comprises indication information, and the mode that is used to indicate AN whether to use resource to advance is come assigned resources, and comprise further alternatively resource advances policy information, is used to indicate AT which kind of propulsion mode to transmit data with; And data transmission module 304, in response to assignment message, come under the situation of assigned resources in the mode that indication information indication AN uses resource to advance, advance strategy to transmit data according to resource.
Wherein, the structure of assignment message is as shown below:
| MACID | User totem information |
| NodeID | The resource identification that distributes |
| PF | The data packet transmission form |
| Duration | The assignment duration |
| Extended?Transmission | Whether the long frame of expansion transmits |
| Boost | Whether advance |
When not comprising resource propelling policy information in advancing message, resource advances strategy to be made an appointment by AN and AT.
In addition, above-mentioned resource includes but not limited to frequency resource, power resource, time interval resource or spatial domain resource, and it can be any one or its combination in any in the above-mentioned various resource; And Access Network can be based on the wireless access network of OFDMA, based on the wireless access network of CDMA and based in the wireless access network of TDMA any one.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (22)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610083536XA CN100471338C (en) | 2006-06-05 | 2006-06-05 | Resource allocation method and system |
| PCT/CN2007/070082 WO2007143947A1 (en) | 2006-06-05 | 2007-06-05 | Resource allocation method and system and network device and access terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200610083536XA CN100471338C (en) | 2006-06-05 | 2006-06-05 | Resource allocation method and system |
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| CN101047886A CN101047886A (en) | 2007-10-03 |
| CN100471338C true CN100471338C (en) | 2009-03-18 |
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| CNB200610083536XA Expired - Fee Related CN100471338C (en) | 2006-06-05 | 2006-06-05 | Resource allocation method and system |
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| WO (1) | WO2007143947A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2433458A4 (en) | 2009-05-18 | 2015-08-05 | SYSTEMS, METHODS AND APPARATUS FOR FACILITATING ALLOCATION OF A RESOURCE COMMON TO A TERMINAL | |
| CN111954306B (en) * | 2020-07-08 | 2024-02-27 | 北京瀚诺半导体科技有限公司 | Hybrid transmission method and system based on time slot and packet scheduling |
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| DE602004018093D1 (en) * | 2004-01-08 | 2009-01-15 | Mitsubishi Electric Corp | Error checking method and system with feedback of the resource allocation scheme |
| WO2005076541A1 (en) * | 2004-02-06 | 2005-08-18 | Nokia Corporation | Network optimization based on service behavior |
| KR20060016600A (en) * | 2004-08-18 | 2006-02-22 | 삼성전자주식회사 | How to Display Resource Allocation Information Individually and How to Reduce the Load in Displaying Resource Allocation Information |
| US7697948B2 (en) * | 2004-10-29 | 2010-04-13 | Telefonaktiebolaget L M Ericsson (Publ) | Resource allocation in communication networks |
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| CN101047886A (en) | 2007-10-03 |
| WO2007143947A1 (en) | 2007-12-21 |
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