CN101087223A - Resource allocation method - Google Patents
Resource allocation method Download PDFInfo
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- CN101087223A CN101087223A CNA2006100836004A CN200610083600A CN101087223A CN 101087223 A CN101087223 A CN 101087223A CN A2006100836004 A CNA2006100836004 A CN A2006100836004A CN 200610083600 A CN200610083600 A CN 200610083600A CN 101087223 A CN101087223 A CN 101087223A
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- interlace
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- indication information
- resource allocation
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Abstract
The invention provides a source distributing method, which includes following steps: first step, accessing network sends first message to the accessing end, and the first message contains indicating information; second step, response the first message, the accessing end transmits the data according to the indicating information on interlace. And the first message can take the inner signaling message or front reversing distributing message. Using said technical schedule, the invention can realize the efficient result: the distribution for service can be realized flexibly, and reduce the cost for repeating distribution.
Description
Technical field
The present invention relates to the communications field, and more particularly, relate to a kind of resource allocation method, it goes for such as the wireless access system based on the interlace transmission structure.
Background technology
At present, 3G (3G (Third Generation) Moblie) mobile communication technology is ripe gradually commercial, and 3GPP2 (3G (Third Generation) Moblie collaborative project tissue 2) CDMA2000 1XEV-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, promptly, stage one is adopted multi-carrier EV-DO (Evolution-Data Only, evolution-only support Packet data service) technology, more consider compatible, the evolution items of short-term just; Second stage is to introduce more advanced technology, such as OFDM (OFDM) technology, MIMO technology etc., 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 modulates corresponding carrier wave respectively, 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 subcarriers on frequency band.
The OFDM technology is a kind of special multi-carrier modulation technology, have between each subcarrier 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, the OFDM technology is widely used at present.OFDMA (based on the access scheme of orthogonal frequency division multiplexi) system utilizes the OFDM technology to make multiplexing technology, promptly by distributing different data subcarriers to distinguish different users to different user.Because transfer of data is used different mutually orthogonal subcarriers between the user, so transfer of data can the phase mutual interference between the user.And when subcarrier is distributed, can be fully reliable this user's wireless environment situation, make full use of frequency selectivity, distribute the data subcarrier of the most suitable transmission to the user, by the allocation schedule optimization Algorithm, can be so that power system capacity improves.In general OFDMA system, use the orthogonality of sub-carrier resources in order to ensure each user, all be that AN (Access Network) concentrates and carries out resource allocation, and give the user the resource assignation that distributes.
H-ARQ (mixing request automatically) is a kind of link adaptation techniques, and its basic process is: data receiver is decoded to the data block that receives, if can not be correctly decoded, then feeds back to data sending terminal, the request repeat data.The data that data sending terminal sends the last time are repacked transmission by certain processing, carry certain data message and verification redundant information in the packet, data receiver is after receiving data retransmission, when decoding, in conjunction with the data block of data block transmitted and re-transmission last time, make full use of the relevant information that they carry, improved the decoding probability.
The use of H-ARQ technology has improved the error correcting capability of Data Receiving in the Radio Access Network, adapts to the variation of Radio Link automatically, has improved transmission performance.Yet, owing in the HARQ transmission course, promptly wait in the process of receiving terminal response ACK, need certain delay, so need certain time interval,, just wasted time resource if this time interval is not used in transfer of data with between retransmitting.So in some wireless access systems, introduce the notion (as shown in Figure 1) of Interlace, such as CDMA2000 1XEV-DO system.
The transmission time unit of every frame is time slot (being frame 802.20), the data that send at the 0th frame owing to need to wait for ACK, if retransmit, then need be in the re-transmission of the 4th frame, during the 1st, the 2, the 3rd frame can send other Frame.Interlace sequence number=frame number mod Interlace number.AT (incoming end) transmits on certain interlace, promptly refers to AT at the 0th frame, the 4th frame, and the 8th frame or the like carries out transfer of data.Utilize this Interlace structure, give full play to the characteristics of HARQ transmission, effectively utilized time resource.
Insert in standard 802.20 systems at the WiMAX that QualCom company proposes, preceding reverse traffic channel all is to adopt the OFDMA multiplex technique, promptly by different user being distributed different sub-carrier resources carry out the business transmission, guarantee the orthogonality of subcarrier between the user, reduce in the sub-district and disturb, improve systematic function.In the assignment message of 802.20 system definitions, two types assignment mode: sticky (viscosity) and non-sticky (non-sticky) are arranged.The Sticky assignment mode is mainly used in following situation, that is, AN wishes that AT remains unchanged the resource of assignment and transformat receiving on the interlace of assignment, and AT resource with assignment on this interlace is carried out transfer of data, removes assigned resources up to AN.The Sticky assignment mode is mainly used in assignment, and some are periodically professional, such as the VoIP business, every 20ms has packet to send, if use the assignment of sticky pattern, what AT can fix so sends at the enterprising line data of certain interlace, has then omitted the expense that repeats assignment.
As shown in Figure 2, if the AT of AN system cycle on Interlace0 is carried out transfer of data, then only on the 0th frame, carry out assignment, after AT receives the sticky assignment, on Interlace0, keep the constant data of carrying out of resource to send, and needn't when the 4th frame, repeat assignment, can save the expense of forward direction allocated channel like this.
Yet in the technical scheme according to correlation technique, when AN carried out the sticky assignment to AT, the object of sticky generally was certain interlace, as shown in Figure 2, wished that exactly resource remains unchanged at interlace0 (the 0th frame, the 4th frame, the 8th frame etc.).Because different business has different QoS demands, so also be different to demands such as time delays, this just can be embodied by the difference in the time interval that sends bag.So if AN wishes resource sticky on certain several interlace, then according to repeating assignment in the technical scheme of correlation technique, for example AN wishes AT sticky on interlace0 and interlace2, then AN must at first carry out the sticky assignment at the 0th frame, carries out the sticky assignment at the 2nd frame again then.And two sticky assignment messages are except delivery time is different, and content is just the same.Like this, waste the efficient of forward direction allocated channel, increased the forward direction expense.
So, be desirable to provide a kind of resource control method, can address the above problem under the prerequisite of assignment message only sending an assignment message or go.So just can reduce the forward direction allocation overhead, the flexible adaptation different business is to the assignment demand of resource simultaneously.
Summary of the invention
Consider the problems referred to above and make the present invention.The invention provides a kind of resource allocation method, it can reduce the forward direction allocation overhead, and the flexible adaptation different business is to the assignment demand of resource, and goes for such as the wireless access system based on the Interlace transmission structure.
Resource allocation method according to the present invention may further comprise the steps: first step, and Access Network sends first message to incoming end, wherein, carries indication information in first message; And second step, in response to first message, incoming end carries out transfer of data with adhesive pattern on the interlace of indication information indication.
Wherein, above-mentioned adhesive pattern refers to, and incoming end keeps the resource of assignment and transformat constant on interlace.In addition, indication information is used in reference to be shown on which interlace and carries out transfer of data with adhesive pattern.
Especially, first message can be the in-band signalling message that sends in in-band signalling.In this case, comprise the interlace quantity information in the in-band signalling message, the quantity that is used to indicate the operable interlace of incoming end, especially, the quantity of indication information equals the quantity of the interlace that incoming end can be suitable for; In addition, also comprise the interlace id information in the in-band signalling message, above-mentioned indication information is used in reference on the interlace that is shown in interlace id information correspondence whether carry out transfer of data with adhesive pattern.
For instance, the sub-segment length of indication information is 1, and wherein, when indication information was 1, indication was carried out transfer of data with adhesive pattern on the interlace of interlace id information correspondence; On the contrary, when indication information was 0, indication was not carried out transfer of data with adhesive pattern on the interlace of interlace id information correspondence.
In addition, first message can also be the preceding reverse assignment message that sends in allocated channel.In this case, the field length of indication information lacks 1 than the quantity of the operable interlace of incoming end, this be because, if the interlace of reverse assignment message was interlaceA before incoming end received thereon, then there be not the bit corresponding in the bit of indication information with interlaceA, that is, the bit of indication information corresponds respectively to operable other interlace of incoming end except that interlaceA.
For instance, when the n bit of indication information was 1, indication was carried out transfer of data with adhesive pattern on its pairing interlace; On the contrary, when the n bit of indication information was 0, indication was not carried out transfer of data with adhesive pattern on its pairing interlace.
Especially, only can use under the situation of an interlace at incoming end, can not carry indication information in the preceding reverse assignment message, this is because incoming end only can carry out transfer of data with adhesive pattern on interlaceA.
By technique scheme, the present invention has realized following beneficial effect: realized the assignment to business flexibly, reduced to repeat the expense of assignment.
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 schematic diagram that the Interlace example is shown;
Fig. 2 is illustrated in the schematic diagram that the enterprising line data of Interlace0 sends;
Fig. 3 is the flow chart that illustrates according to the resource allocation method of first embodiment of the invention;
Fig. 4 is the chart that illustrates according to the in-band signalling message structure of first embodiment of the invention;
Fig. 5 is the flow chart that illustrates according to the resource allocation method of second embodiment of the invention; And
Fig. 6 is the chart that illustrates according to the in-band signalling message structure of second embodiment of the invention.
Embodiment
Hereinafter with reference to accompanying drawing the preferred embodiments of the present invention are described.
First embodiment
At first with reference to Fig. 3 and Fig. 4, wherein, Fig. 3 is the flow chart that illustrates according to the resource allocation method of the embodiment of the invention, and Fig. 4 is the chart that illustrates according to the in-band signalling message structure of first embodiment of the invention.
As shown in Figure 3, in step S302, Access Network sends in-band signalling message (first message to incoming end in in-band signalling, SelectinterlaceAssignment), wherein, carry indication information (StickyEnable) in the in-band signalling message, be used in reference to be shown on which interlace and carry out transfer of data with adhesive pattern;
Next, in step S304, incoming end is gone up at the interlace of indication information (StickyEnable) indication and is carried out transfer of data with adhesive pattern; Wherein, adhesive pattern refers to, and incoming end keeps the resource of assignment and transformat constant on interlace.
Especially, as shown in Figure 4, comprise interlace quantity information (NumAssignInterlace) in the in-band signalling message, the quantity that is used to indicate the operable interlace of incoming end, in the present embodiment, the quantity of the operable interlace of incoming end is 4.In addition, the quantity of indication information (StickyEnable) equals the quantity of the interlace that incoming end can be suitable for, for the sake of clarity, only shows one among Fig. 4.
In addition, as shown in Figure 4, also comprise interlace id information (interlace ID) in the in-band signalling message, the field length of indication information (StickyEnable) is 1, be used in reference on the interlace that is shown in interlace id information correspondence and whether carry out transfer of data with adhesive pattern, when indication information (StickyEnable) was 1, indication was carried out transfer of data with adhesive pattern on the interlace of interlace id information correspondence; On the contrary, when indication information (StickyEnable) was 0, indication was not carried out transfer of data with adhesive pattern on the interlace of interlace id information correspondence.In example shown in Figure 4, interlace ID is that 3 the pairing indication information of interlace (StickyEnable) is 1, so this interlace can carry out transfer of data with adhesive pattern.
Second embodiment
Next with reference to Fig. 5 and Fig. 6, wherein, Fig. 5 is the flow chart that illustrates according to the resource allocation method of second embodiment of the invention; Fig. 6 is the chart that illustrates according to the in-band signalling message structure of second embodiment of the invention.
Main difference with first embodiment is according to a second embodiment of the present invention, in the present embodiment, and the preceding reverse assignment message of first message in allocated channel, sending.
Specifically, as shown in Figure 5, in step S502, Access Network in allocated channel before incoming end sends reverse assignment message, wherein, carry indication information (Sticky Mask) in the preceding reverse assignment message, be used in reference to be shown on which interlace and carry out transfer of data with adhesive pattern;
Next, in step S504, incoming end is gone up at the interlace of indication information (Sticky Mask) indication and is carried out transfer of data with adhesive pattern; Wherein, adhesive pattern refers to, and incoming end keeps the resource of assignment and transformat constant on interlace.
The field length of indication information (Sticky Mask) lacks 1 than the quantity of the operable interlace of incoming end of the middle regulation of in-band signalling message (SelectinterlaceAssignment), this be because, if the interlace of reverse assignment message was interlaceA before incoming end received thereon, then there be not the bit corresponding in the bit of indication information with interlaceA, promptly, the bit of indication information corresponds respectively to operable other interlace of incoming end except that interlaceA, and preferably, the bit of indication information and the incoming end interlace that can use is corresponding one by one according to the ascending order relation.
As shown in Figure 6, in the present embodiment, because the operable interlace quantity of incoming end was 4 (as shown in Figure 4), so the field length of indication information (Sticky Mask) is 3bit, especially, do not send as yet at network side under the situation of in-band signalling message (SelectinterlaceAssignment), in the present embodiment, the field length of indication information (Sticky Mask) is 5bit, that is, acquiescence is supported all interlace.
For example, if in-band signalling message specifies AT can only use interlace0, interlace3 and interlace5, and incoming end is received assignment at interlace3, then incoming end must carry out transfer of data with adhesive pattern at interlace3, simultaneously, Sticky Mask field is made up of 2 bits, and 0bit is illustrated in interlace0 and whether carries out transfer of data with adhesive pattern, and 1bit is illustrated in interlace5 and whether carries out transfer of data with adhesive pattern.
Especially, if AT can only use 1 interlace, then preceding oppositely assignment message can not carry indication information (Sticky Mask) field, and the expression incoming end only can carry out transfer of data with adhesive pattern on interlaceA.
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 (15)
1. a resource allocation method is characterized in that, may further comprise the steps:
First step, Access Network sends first message to incoming end, and is wherein, described
Carry indication information in first message; And
Second step, in response to described first message, described incoming end carries out transfer of data with adhesive pattern on the interlace of described indication information indication.
2. resource allocation method according to claim 1 is characterized in that, under described adhesive pattern, described incoming end keeps the resource of assignment and transformat constant on interlace.
3. resource allocation method according to claim 1 and 2 is characterized in that, described indication information is used in reference to be shown on which interlace and carries out transfer of data with described adhesive pattern.
4. resource allocation method according to claim 1 is characterized in that, described first message is the in-band signalling message that sends in in-band signalling.
5. resource allocation method according to claim 4 is characterized in that, comprises the interlace quantity information in the described in-band signalling message, is used to indicate the quantity of the operable interlace of described incoming end.
6. resource allocation method according to claim 5 is characterized in that the quantity of described indication information equals the quantity of the operable interlace of described incoming end.
7. resource allocation method according to claim 4 is characterized in that,
Comprise the interlace id information in the described in-band signalling message, whether described indication information indication carries out transfer of data with described adhesive pattern on the interlace of described interlace id information correspondence.
8. resource allocation method according to claim 7 is characterized in that,
The field length of described indication information is 1, wherein,
When described indication information was 1, indication was carried out transfer of data with described adhesive pattern on the interlace of described interlace id information correspondence; And
When described indication information was 0, indication was not carried out transfer of data with described adhesive pattern on the interlace of described interlace id information correspondence.
9. resource allocation method according to claim 1 is characterized in that, described first message is the preceding reverse assignment message that sends in allocated channel.
10. resource allocation method according to claim 9 is characterized in that,
In the reverse assignment message, the field length of described indication information lacks 1 than the quantity of the operable interlace of described incoming end before described.
11. resource allocation method according to claim 9 is characterized in that,
Described incoming end interlaceA receive described before reverse assignment message.
12. resource allocation method according to claim 11 is characterized in that, the bit of described indication information corresponds respectively to operable other interlace of described incoming end except that described interlaceA.
13. method according to claim 12 is characterized in that, the bit of described indication information and the operable interlace of described incoming end are corresponding one by one according to the ascending order relation.
14. resource allocation method according to claim 12 is characterized in that,
When the n bit of described indication information was 1, indication was carried out transfer of data with described adhesive pattern on its pairing interlace; And
When the n bit of described indication information was 0, indication was not carried out transfer of data with described adhesive pattern on its pairing interlace.
15. resource allocation method according to claim 9, it is characterized in that, only can use under the situation of an interlace at described incoming end, oppositely can not carry described indication information in the assignment message before described, described incoming end only can carry out transfer of data with described adhesive pattern on described interlaceA.
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| CNA2006100836004A CN101087223A (en) | 2006-06-09 | 2006-06-09 | Resource allocation method |
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| CNA2006100836004A CN101087223A (en) | 2006-06-09 | 2006-06-09 | Resource allocation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010078846A1 (en) * | 2009-01-08 | 2010-07-15 | 华为技术有限公司 | Resource assignment method and mobile terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010078846A1 (en) * | 2009-01-08 | 2010-07-15 | 华为技术有限公司 | Resource assignment method and mobile terminal |
| CN101778476B (en) * | 2009-01-08 | 2012-07-04 | 华为技术有限公司 | Resource assignment method and mobile terminal |
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