CN101527961B - Method for indicating downlink resource allocation - Google Patents

Method for indicating downlink resource allocation Download PDF

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CN101527961B
CN101527961B CN2008100077525A CN200810007752A CN101527961B CN 101527961 B CN101527961 B CN 101527961B CN 2008100077525 A CN2008100077525 A CN 2008100077525A CN 200810007752 A CN200810007752 A CN 200810007752A CN 101527961 B CN101527961 B CN 101527961B
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resource
allocation
mode
downlink resource
distributing
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CN101527961A (en
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袁明
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ZTE Corp
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Abstract

The invention provides a method for indicating downlink resource allocation. The method comprises that: after a network side allocates a downlink resource for a user side according to the requirement of the user side by centralization, full decentralization or partial decentralization, the allocation mode of the downlink resource is indicated by a tree structure, a permutation and combination mode or a resource block subset mode correspondingly. By the method, all situations of RB allocation in the full decentralization mode and centralization mode can be indicated, meanwhile, most situations of the RB allocation in the partial decentralization mode can be indicated. Furthermore, when bandwidths in an LTE (long term evolution) system and an IMT-Advanced (advanced international mobile telecommunication) system are larger, under a condition of not reducing the dispatch flexibility, signaling cost of resource allocation can be reduced to a certain extent.

Description

A kind of method for indicating downlink resource allocation
Technical field
The present invention relates to the communication technology, relate in particular to a kind of method for indicating downlink resource allocation.
Background technology
Downlink system is divided into some Physical Resource Block (PRB) with frequency resource, and PRB is the smallest allocation unit of downlink resource, and size is 12 number of sub-carrier.The data of downlink user are sent with the form of virtual resource blocks (VRB), and VRB can adopt concentrated (Localized) or the mode of (Distributed) of disperseing is mapped on the PRB.The Localized mode promptly takies some adjacent PRB, and under this mode, system can obtain multi-user's gain through frequency domain dispatching; The Distributed mode promptly takies the PRB of some dispersions, and it is divided into complete distributing and part distributing again, adopts this mode to shine upon, and system can obtain frequency diversity gain.
The characteristic of above-mentioned three kinds of resource distribution modes is detailed below:
The centralised allocation mode: the VRB that distributes for the user is fully continuously together, and promptly middle do not have at interval, and 1 VRB just is mapped on 1 PRB;
The complete distributing method of salary distribution: each VRB that distributes for the user is discontinuous, have at interval in the middle of promptly, and 1 VRB is mapped on 2 or 3 PRB.That is to say, comprised the VRB of 2 or 3 different users among 1 PRB;
The part distributing distributes with the distributing distribution is the same fully, and each VRB that distributes for the user is discontinuous, and promptly middle have at interval.The two difference is, adopts part distributing mapping mode, and 1 VRB just only is mapped on 1 PRB.
In the prior art, mainly utilize RB Subsets (Resource Block subclass) to carry out the resource allocation indication.The number of RB Subsets determines by system bandwidth, and utilizes header to indicate concrete distribution to belong to which RB Subsets, indicate concrete RB (Resource Block) at the inner bitmap (bit diagram) that uses of RB Subsets simultaneously.Therefore the shared resource of indication of this resource allocation signal is made up of two parts, i.e. the inner required bit number of header bit number+RB Subsets.For example, during the 5MHz bandwidth, RBSubsets is divided into 2 groups, indicates concrete RB with 13 bits in every group; During the 10MHz bandwidth, RB Subsets is divided into 3 groups, indicates concrete RB with 17 bits in every group; During the 20MHz bandwidth, RB Subsets is divided into 4 groups, indicates concrete RB with 25 bits in every group.
Though this resource allocation indicating method can be indicated complete distributing and centralized RB distribution condition to a certain extent in RB Subsets inside, its flexibility is very limited, can not contain complete distributing and all centralized distribution condition.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method for indicating downlink resource allocation, to indicate complete distributing and all centralized distribution condition.
For addressing the above problem, the invention provides a kind of method for indicating downlink resource allocation, comprising:
Network side correspondingly adopts the mode of tree structure, permutation and combination type or Resource Block subclass that the said downlink resource method of salary distribution is indicated after adopting centralized, complete distributing or part distributing to be its allocation of downlink resource according to the needs of user side.
Further, said method also can have following characteristic:
This method specifically may further comprise the steps:
A, said network side calculate centralized, the complete distributing of indication, the required bit number B of part distributing resource allocation methods respectively according to system bandwidth 1, B 2, B 3, and will be wherein bit number maximum be designated as B Max
B, with each contains B under each downlink resource method of salary distribution MaxThe pairing concrete distribution condition of the bit sequence of individual bit is kept at said network side and user side;
C, said network side be according to the needs allocation of downlink resource of said user side, and bit sequence that will be corresponding with the concrete distribution condition of this kind sends to said user side after forming indication signaling with the header that is made up of resource distribution mode.
Further, said method also can have following characteristic:
Figure S2008100077525D00021
B 3Value by said system bandwidth and B 2Value determine jointly;
Wherein,
Figure S2008100077525D00031
Expression rounds up, N RBBe total number of Resource Block under the said system bandwidth, K is the quantity of the maximum resource requirement pieces of user.
Further, said method also can have following characteristic:
The bit number that said header comprises
Figure S2008100077525D00032
Wherein,
Figure S2008100077525D00033
Expression rounds up, N Type3The number of the Resource Block subclass that is adopted for indicating section distributing resource allocation methods.
Adopt the present invention, can indicate all situations that complete distributing and centralized RB distribute, can also refer to illustrate most of situation that part distributing RB distributes simultaneously.And when the bandwidth in LTE (Long Term Evolution) system and IMT-Advanced (the senior international mobile communication) system is big, under the situation that does not reduce dispatching flexibility, can reduce the signaling consumption of resource allocation to a certain extent.
Description of drawings
Fig. 1 is the flow chart of method for indicating downlink resource allocation in the embodiment of the invention.
The Subset kind of Fig. 2 for comprising among the Type 3 under the 10MHz system bandwidth in the embodiment of the invention.
Embodiment
To combine accompanying drawing and embodiment that technical scheme of the present invention is explained in more detail below.
A kind of method for indicating downlink resource allocation provided by the invention; Comprise: network side adopts centralized, complete distributing or part distributing for after its allocation of downlink resource according to the needs of user side, correspondingly adopts the mode of tree structure, permutation and combination type and Resource Block subclass that the said downlink resource method of salary distribution is indicated.The concrete steps of indication are as shown in Figure 2, as follows:
A, network side calculate centralized, the complete distributing of indication, the required bit number B of part distributing resource allocation methods respectively according to system bandwidth 1, B 2, B 3, and with above-mentioned bit number maximum be designated as B Max
B, with each contains B under each downlink resource method of salary distribution MaxThe pairing concrete distribution condition of the bit sequence of individual bit is kept at above-mentioned network side and user side;
C, network side be according to the needs allocation of downlink resource of user side, and bit sequence that will be corresponding with the concrete distribution condition of this kind sends to user side after forming indication signaling with the header that is made up of resource distribution mode.
Above-mentionedly be directed against three kinds of different RB methods of salary distribution and adopt the different resources indicating means, can be designated as Type 1, Type 2, Type 3 respectively.
The indicating means that Type 1 uses when adopting the complete distributing method of salary distribution is as distributing indication to the professional downlink resource of VolP (ip voice).Because in the middle of all transport services, the VoIP business nearly accounts for 30%, and according to different MCS (modulation demodulation system), the quantity of the professional resource requirement piece of VoIP is between 1 to 4 RB.Therefore, in order to realize sufficient frequency diversity, should be to the complete distributed RB distribution method of the professional employing of VoIP.Calculate the method that the required bit number of this kind indicating mode mainly adopts permutation and combination, can be according to formula
Figure S2008100077525D00041
Obtain, wherein,
Figure S2008100077525D00042
Expression rounds up, N RBBe total number of RB under this system bandwidth, K is the quantity of the maximum resource requirement pieces of user.Because the quantity of the professional resource requirement piece of VoIP is 4 at most, so as need be for this traffic assignments downlink resource the time, the bit number of required indication information is:
Figure S2008100077525D00043
Type 2 is the indicating means of using when adopting the centralised allocation mode.This kind indicating mode mainly adopts tree structure of the prior art, and its required bit number can obtain through formula
Figure S2008100077525D00044
.
Type 3 is the indicating means of using when adopting the part distributing method of salary distribution, and it utilizes RBSubsets to represent.Wherein, RB Subsets specifically is divided into several groups by system bandwidth and the common decision of Type 1 required bit number.This is that the number of the RB of composition RBG (RB group) is just inequality because system bandwidth is different.For example, bandwidth is the system of 10MHz, and each RBG is made up of 3 RB; And bandwidth is the system of 20MHz, and each RBG is made up of 4 RB.And, all identical for guaranteeing the required bit number of every kind of Type, under different system bandwidths, the influence of confirming also to receive Type 1 required bit number of RBG size.And RB Subset specifically is divided into several groups directly by the decision of the size of RBG, therefore says that RB Subsets specifically is divided into several groups, is that the size by system bandwidth determines with Type 1 required bit number jointly.Fig. 2 has provided the kind of the RB Subsets that comprises among the Type 3 under the 10MHz system bandwidth.Wherein need have certain displacement between Subset 000 and other Subset, purpose is in order to increase the sum of resource allocation kind, to improve the flexibility of scheduling.
Because every kind of required bit number of Type is not quite similar, therefore, it is mended the indication information that becomes to have identical total number of bits at last, so that the resource allocation indication is carried out in unification.
In sum, the required total bit of resource allocation indication is made up of two parts: first, distinguish above-mentioned different Type with the header of 3 or 4 bits, the bit number that header comprises:
Figure S2008100077525D00051
Wherein, N Type3The number of the Resource Block subclass that is adopted for indicating section distributing resource allocation methods; Second portion, every kind of bit number that Type is inner required.
Table 1 has provided under the different system bandwidth, utilize above-mentioned three kinds of resource allocation indicating methods indicate the total number of bits that needs respectively.Wherein, padding (filling) is the bit that increases for the required bit number of resource allocation indication information of unified various Type.Can find out from table 1; This scheme is more suitable to the bigger situation of system bandwidth; And the resource allocation indication scheme of utilizing us to propose, the information that can transmit 1 bit to the user is to indicate this user's resource distribution mode, because comprised this information in the header.
Adopt the required bit number of resource allocation indicating mode provided by the present invention under the various system bandwidths of table 1
System bandwidth The bit number that TYPE 1 is required The bit number that TYPE 2 is required Kind and every kind of required bit number of comprising RB Subset among the TYPE 3 The total number of bits that this resource allocation methods is required
5MHz 14bits 9bits+padding Totally 3 kinds, every kind of 12bits+ padding 3 (header)+14=17bits
10MHz 18bits 11bits+ padding Totally 3 kinds, every kind of 15bits+ padding 3 (header)+18=21bits
20MHz 22bits+ padding 12bits+ padding Totally 5 kinds, every kind of 23bits 3 (header)+23=26bits
40MHz 26bits 14bits+ padding Totally 8 kinds, every kind of 26bits 4 (header)+26=30bits
80MHz 30bits 16bits+ padding Totally 13 kinds, every kind of 30bits 4 (header)+30=34bits
100 MHz 34bits+ padding 17bits+ padding Totally 14 kinds, every kind of 35bits 4 (header)+35=39bits
Certainly; 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 work as 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 (3)

1. a method for indicating downlink resource allocation is characterized in that,
Network side correspondingly adopts the mode of tree structure, permutation and combination type or Resource Block subclass that the said downlink resource method of salary distribution is indicated after adopting centralized, complete distributing or part distributing to be its allocation of downlink resource according to the needs of user side;
Specifically may further comprise the steps:
A, said network side calculate centralized, the complete distributing of indication, the required bit number B of part distributing resource allocation methods respectively according to system bandwidth 1, B 2, B 3, and will be wherein bit number maximum be designated as B Max
B, with each contains B under each downlink resource method of salary distribution MaxThe pairing concrete distribution condition of the bit sequence of individual bit is kept at said network side and user side;
Said network side is according to the needs allocation of downlink resource of said user side, and bit sequence that will be corresponding with the concrete distribution condition of this kind sends to said user side after forming indication signaling with the header that is made up of resource distribution mode.
2. the method for claim 1 is characterized in that,
Figure FSB00000684713000011
B 3Value by said system bandwidth and B 2Value determine jointly;
Wherein,
Figure FSB00000684713000013
Expression rounds up, N RBBe total number of Resource Block under the said system bandwidth, K is the quantity of the maximum resource requirement pieces of user.
3. the method for claim 1 is characterized in that,
The bit number that said header comprises
Figure FSB00000684713000014
Wherein,
Figure FSB00000684713000015
Expression rounds up, N Type3The number of the Resource Block subclass that is adopted for indicating section distributing resource allocation methods.
CN2008100077525A 2008-03-07 2008-03-07 Method for indicating downlink resource allocation Expired - Fee Related CN101527961B (en)

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CN102014444B (en) * 2009-12-31 2013-04-17 电信科学技术研究院 Method and device for distributing downstream resources and receiving downstream data
CN102123503B (en) * 2010-01-07 2016-02-10 中兴通讯股份有限公司 A kind of resource allocation methods of Physical Downlink Shared Channel of repeated link and device
CN102835164B (en) * 2010-04-02 2015-06-10 上海贝尔股份有限公司 Method and device for synchronizing resource allocating indication information order in wireless networks
CN102238627B (en) * 2010-05-05 2015-04-22 电信科学技术研究院 Resource allocating method and device of downlink shared channel
CN102281636B (en) 2010-06-12 2016-04-13 中兴通讯股份有限公司 The resource allocation methods of the Physical Downlink Control Channel of repeated link and system
CN101883434B (en) * 2010-06-18 2015-09-16 中兴通讯股份有限公司 A kind of channel resource allocation method and base station
WO2016115667A1 (en) * 2015-01-19 2016-07-28 华为技术有限公司 Common message transmission method and system, base station and user equipment
CN105992351B (en) 2015-01-30 2021-05-11 中兴通讯股份有限公司 Resource allocation method and device and information feedback method and device
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