CN101447853B - Channel quality information component channel distribution method and communication control device - Google Patents
Channel quality information component channel distribution method and communication control device Download PDFInfo
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- CN101447853B CN101447853B CN200810208072A CN200810208072A CN101447853B CN 101447853 B CN101447853 B CN 101447853B CN 200810208072 A CN200810208072 A CN 200810208072A CN 200810208072 A CN200810208072 A CN 200810208072A CN 101447853 B CN101447853 B CN 101447853B
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Abstract
The embodiment of the invention provides a channel quality information (CQI) component channel distribution method and a communication control device. The CQI component channel distribution method comprises the steps: a CQI component channel on a reserved resource block (RB) is looked up; if the current CQI component channel meets the requirements distributed to the user who sends CQI resource request, the resource in idle time domain resource of the CQI component channel is distributed to the user; if not, the CQI component channel is continuously searched. The communication control device comprises a searching unit, a judgment unit and an allocation unit, wherein, the searching unit is used for searching the CQI component channel reserved on the RB; the judgment unit is used for judging whether the current CQI component channel meets the requirements distributed to the user; the allocation unit is used for distributing the resource in idle time domain resource of the CQI component channel to the user. When the CQI component channels are distributed, the method and the device provided by the embodiment of the invention are beneficial to the multiplexing of different users to the same component channel.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to method and communication control unit that the CQI subchannel distributes.
Background technology
In November, 2004,3GPP has passed through about 3G Long Term Evolution (Long Term Evolution, project verification work LTE).The target of 3G LTE is: higher data rate, lower time delay, improved power system capacity and coverage, and lower cost.
The user is at PUCCH (Physical Uplink Control Channel in LTE; Physical Uplink Control Channel) going up the upstream control signaling that sends to eNodeB comprises: ACK/NACK (affirmation/non-affirmation), SRI (Scheduling Request Indicator, dispatch request indication) and CQI (Channel QualityInformation; Channel quality information); Wherein, ACK/NACK is used for HARQ (Hybrid AutomaticRepeat Request mixes automatic repeat requests); SRI is used to ask ascending resource scheduling, and CQI is used to provide the feedback information of down channel quality.ENodeB is adaptively selected according to the MCS (Modulation and Code Scheme, coded modulation scheme) that the CQI that is used to report carries out downlink transmission data.
CQI adopts the mode of periodically sending on PUCCH.The user will carry out periodic CQI and report, and just need on PUCCH, distribute the subchannel of CQI.Because RB (Resource Block; Resource Block) going up the operable cyclic shift number of CQI subchannel is 12; If it is bigger that user's time delay is expanded, before and after the CQI subchannel that distributes for this user, just need the interval boundary belt to guarantee the orthogonality of CQI interchannel.Therefore the distribution method of CQI subchannel is extremely important for the LTE system.In research and practice process to prior art, inventor of the present invention finds that present CQI channel allocation method of the prior art is unfavorable for the CQI subchannel of the same CQI sub channel resource of different user time division multiplexing of different CQI report cycles.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is to provide a kind of distribution method of CQI subchannel, can help having the same CQI sub channel resource of different user time division multiplexing of different CQI report cycles.
For realizing above-mentioned purpose, the embodiment of the invention provides a kind of CQI channel allocation method, and this method can comprise:
Search the CQI subchannel on the reserved resource piece RB; If current C QI subchannel satisfies the requirement of distributing to the user who sends the CQI resource request; Then Resources allocation is given this user from the idle time-domain resource of current C QI subchannel, if do not satisfy, then continues to search said CQI subchannel.
The embodiment of the invention also provides a kind of communication control unit, and this device can comprise:
Search the unit, be used to search the CQI subchannel of reserving on the RB;
Judging unit is used to judge whether current C QI subchannel satisfies the requirement of distributing to the user who sends the CQI resource request;
Allocation units are used for the judged result according to said judging unit, and Resources allocation is given this user from the idle time-domain resource of the CQI subchannel that satisfies the requirement distribute to said user.
Can know that by above-mentioned disclosed technical scheme the method and apparatus that the embodiment of the invention provides is that first time domain is distributed, help different user multiplexing to same CQI subchannel, and further reduce the uplink control signaling expense.
Description of drawings
Fig. 1 is the resource allocation sketch map on the PUCCH in the prior art;
Fig. 2 is the flow chart of the CQI channel allocation method that provides of the embodiment of the invention one;
Fig. 2 a is the flow chart of the CQI channel allocation method that provides of the embodiment of the invention two;
Fig. 3 a is all users' in the RB a Δ
UE_shiftAll equal under 1 the situation sketch map of CQI subchannel;
Fig. 3 b is the Δ that a user is arranged in the RB
UE_shiftEqual under 2 the situation sketch map of CQI subchannel;
Fig. 4 is to be the sketch map of CQI subchannel time-domain resource tree structure of correspondence in all CQI cycles of minimum common factor with 2ms;
Fig. 5 is to be the sketch map of CQI subchannel time-domain resource tree structure of correspondence in all CQI cycles of minimum common factor with 5ms;
Fig. 6 is the sketch map of the communication control unit that provides of the embodiment of the invention three.
Embodiment
Present LTE is supported under the different system bandwidth, and configuration PUCCH takies the sum and the RB number of keeping for CQI of RB, and is as shown in Figure 1; On PUCCH, carry out CQI, semi-static ACK and SRI, dynamic ack and take resource and arrange, CQI occupies the RB at edge, two ends; Then reserving fixing resource and give semi-static ACK and SRI, is the ACK resource of dynamic dispatching at last, laterally is time shaft; Be frequency axis vertically; Corresponding RB of delegation wherein, a RB be because operable cyclic shift number is 12, supplies the user to use so RB can maximum be divided into 12 subchannel.Using CQI channel allocation method that the embodiment of the invention provides can distributing all subchannels on all RB that keep for CQI (below be called the CQI subchannel).
Specify CQI channel allocation method and the device that the embodiment of the invention provides below.
Embodiment one
A kind of CQI channel allocation method that the embodiment of the invention one provides, as shown in Figure 2, this method can comprise:
Step S201: search the CQI subchannel on the reserved resource piece RB;
Step S202: judge whether current C QI subchannel satisfies the requirement of distributing to the user who sends the CQI resource request, if then if execution in step S203 not, then returns and continues execution in step S201;
Step S203: Resources allocation is given this user from the idle time-domain resource of current C QI subchannel.
This shows, when distributing the CQI subchannel, realize the first time domain distribution method of frequency domain again in the embodiment of the invention, help different user multiplexing to same CQI subchannel.
Embodiment two
Further, in order to guarantee the orthogonality between the adjacent C QI subchannel, on the basis of embodiment one, above-mentioned CQI subchannel satisfied further introduced in the requirement distribute to said user about whether satisfying the requirement of orthogonality aspect.Specifically see also Fig. 2 a, present embodiment provides a kind of CQI channel allocation method, and this method comprises:
Step S301: receive the CQI resource request information that the user sends;
Step S302:, obtain this user's user class time delay spreading parameter Δ according to the user's who sends the CQI resource request time delay expansion
UE_shift
Wherein, introduced a kind of new parameter in the method that provides in the embodiment of the invention, i.e. user class time delay spreading parameter, this user class time delay spreading parameter Δ
UE_shiftObtain according to measuring the expansion of user's time delay; There is corresponding relation between user class time delay spreading parameter and the number, so according to this user class time delay spreading parameter Δ for the required CQI subchannel that plays buffer action of the orthogonality that guarantees the cyclic shift between the user
UE_shiftCan confirm number for the CQI subchannel of needed buffer action of the orthogonality that guarantees the cyclic shift between the user.And with reference in the prior art for the value of system-level time delay spreading parameter, the Δ of introducing in the present embodiment
UE_shiftUser class time delay expansion according to different can be taken as 1,2 or 3, and certainly, those skilled in the art should be understood that the interval of this user's user class time delay spreading parameter can also be other predefined intervals.
Step S303: search the CQI subchannel of reserving on the RB;
Step S304: judge whether current C QI subchannel satisfies the requirement of distributing to said user, if then if execution in step S305 not, then returns and continues execution in step S303;
Step S305: Resources allocation is given this user from the idle time-domain resource of current C QI subchannel.
Wherein, be idle current C QI subchannel for state, the said satisfied requirement of distributing to said user comprises:
Front and back user class time delay spreading parameter-1 an adjacent C QI subchannel in the RB of this CQI subchannel place is idle or forbidding;
For state is the current C QI subchannel that takies, and the said satisfied requirement of distributing to said user comprises:
Front and back user class time delay spreading parameter-1 an adjacent C QI subchannel in the RB of this CQI subchannel place can be distributed to user's idle time-domain resource for forbidding and the existence of current C QI subchannel.
In practical application, can represent the CQI subchannel of the every row in this table in can a corresponding RB, and the time-domain resource of row in can corresponding each CQI subchannel to the CQI subchannel utilization of the RB of all reservations.Search the CQI subchannel of reserving on the RB, i.e. if traversal list when having searched all CQI subchannels on the RB and still not having time-domain resource to distribute to the user, then continues to search first CQI subchannel of next RB.
Because the user class time delay spreading parameter Δ in the embodiment of the invention
UE_shiftCan weigh the time delay expansion of sending the CQI resource request; Therefore; For the cyclic shift orthogonality between the user who guarantees to take the different CQI subchannels in the same RB, when distributing the CQI subchannel to give the user, at first according to this user's user class time delay spreading parameter Δ
UE_shift, judge whether current C QI subchannel satisfies the requirement that can distribute to this user.
Need to prove that the implication of the various states of CQI subchannel is following in the embodiment of the invention:
(1) free time, is meant that all time-domain resource of this CQI subchannel are not all distributed to the user;
(2) take, be meant that the part time-domain resource of this CQI sub channel resource has been distributed to the user;
(3) take, be meant that whole time-domain resource of this CQI sub channel resource have been distributed to the user;
(3) forbidding is meant that this CQI sub channel resource forbids distributing to Any user.
According to the different conditions of CQI subchannel, specify step S304 respectively below.
A) be the CQI subchannel that takes and forbid for state; Can't distribute any idle time-domain resource to give the user; Therefore be that the CQI subchannel that takes and forbid just need not also to judge whether this subchannel satisfies the requirement of distributing to the user for state, therefore, in the present embodiment; Distribute in user's the requirement for current C QI subchannel is satisfied, the state that need not consider current C QI subchannel is the situation that takes and forbid.
B) be idle CQI subchannel for state, this CQI subchannel satisfies the requirement of distributing to said user and is specially: the front and back Δ in the RB of this CQI subchannel place
UE_shift-1 adjacent C QI subchannel is idle or forbidding.
Because state is not distributed to Any user for idle CQI subchannel with forbidding all means; So state can play the interval action (perhaps being called the intercycle protection) of certain protection orthogonality for idle CQI subchannel with forbidding; To the embodiment of the invention, the user class time delay spreading parameter Δ of expression user time delay expansion
UE_shiftAct as: if there is Δ the front and back in the RB of current C QI subchannel place
UE_shift-1 CQI subchannel does not distribute Any user, then after current C QI subchannel distributes this user, can guarantee the orthogonality between other CQI subchannels in the same RB of this CQI subchannel and distributing user.To sum up, the front and back Δ in above-mentioned CQI subchannel place RB
UE_shiftWhen-1 adjacent C QI subchannel is free time or forbidding; Can distribute to this user from any time-domain position the current C QI subchannel; Certainly, also can begin to distribute by the time-domain position (perhaps being called first time-domain position) that begins most from time-domain resource in order to make algorithm simple.
In addition, for the front and back Δ in the RB of current C QI subchannel place
UE_shift-1 adjacent C QI subchannel is idle situation; After current C QI subchannel distributed to the user; For the orthogonality between other CQI subchannels in the same RB that guarantees this CQI subchannel and distributing user, also need be with the front and back Δ in the RB of current C QI subchannel place
UE_shiftThe status modifier of-1 adjacent C QI subchannel is forbidding.
C) be the CQI subchannel that takies for state, this CQI subchannel satisfies the requirement of distributing to said user and is specially: the front and back Δ in the RB of this CQI subchannel place
UE_shift-1 adjacent C QI subchannel is forbidding, and this CQI subchannel has the idle time-domain resource that can distribute to this user.
In order further reasonably to distribute the CQI subchannel, thereby more help the multiplexing of CQI subchannel, in the embodiment of the invention, judge the front and back Δ in the RB of this CQI subchannel place
UE_shiftWhether-1 adjacent C QI subchannel is that the step of forbidding is preferably: judge whether the front and back in the RB of current C QI subchannel place have and only have Δ
UE_shift-1 adjacent C QI subchannel forbidding.Might as well illustrate the effect of this preferred mode:
Δ
UE_shiftCan value 1,2,3, Δ
UE_shift=1 this user's of expression cyclic shift does not need protection at interval, Δ
UE_shift=2 these users' of expression cyclic shift needs one at interval to protect Δ
UE_shift=3 these users' of expression cyclic shift needs two at interval, can not have influence on the orthogonality between cyclic shift at interval.
Might as well a CQI subchannel be expressed as delegation, row Nei Gelie is to time-domain resource position that should the CQI subchannel, shown in Fig. 3 a, if all users' in RB Δ
UE_shiftAll equal 1, then this RB inside does not need the intercycle protection, can distribute 12 cyclic shifts, i.e. 12 CQI subchannels so on this RB at most; Shown in Fig. 3 b, if a user's Δ is arranged in this RB
UE_shift=2, then need two cyclic shifts (i.e. two CQI subchannels) and can not distributing user promptly be set to forbidding, so the quantity of the CQI subchannel that can distribute in this RB has just reduced.
Suppose that a CQI subchannel distributed to Δ
UE_shift=2 user, then 1 the CQI subchannel in front and back in the RB of this CQI subchannel place necessarily has been set to forbidding, no longer allows to distribute Any user, and a Δ is arranged this moment
UE_shift=1 user initiates the CQI resource request, according to Δ
UE_shiftDefinition, distribute this Δ
UE_shift=1 user's CQI subchannel is not need the cyclic shift protection, therefore with this Δ
UE_shiftNot have before and after=1 user is assigned in the RB of place forbidding the CQI subchannel the CQI subchannel or be assigned in the RB of place before and after have the CQI subchannel that 1 CQI subchannel is forbidden all to be fine before and after the CQI subchannel of 1 CQI subchannel forbidding being arranged or being assigned in the RB of place.But, if Δ
UE_shiftCQI subchannel (the Δ promptly that does not have forbidding before and after=1 user is not assigned in the RB of place
UE_shift-1 CQI subchannel is disabled) the CQI subchannel, for example, if Δ
UE_shift=1 user has the CQI subchannel of 1 CQI subchannel forbidding before and after being assigned in the RB of place, and necessarily takies a part of time-domain resource of this CQI subchannel, then another newly-increased Δ
UE_shiftTherefore=2 user has also just lost a part of time-domain resource that on this CQI subchannel, can distribute, but this Δ
UE_shift=2 user can not go again to take to be fit to very much distribute to Δ
UE_shiftThe CQI subchannel not have the CQI subchannel of the CQI subchannel of forbidding before and after in=1 user's the place RB, so this has just caused unreasonable in the resource allocation, irrational source just to be, the user has been assigned to the front and back that belong in the RB greater than Δ
UE_shiftOn the CQI subchannel of-1 CQI subchannel forbidding; Therefore distribute in order to help reasonable resources, improve the utilance of resource, the embodiment of the invention has proposed preferred embodiment above-mentioned; That is, judge whether the front and back in the RB of current C QI subchannel place have and only have Δ
UE_shift-1 adjacent C QI subchannel forbidding.
In the embodiment of the invention; Can adopt tree structure to represent for the time-domain resource in the CQI subchannel; CQI report cycle of each layer correspondence of tree; Each time-domain position in the corresponding said CQI report cycle of each node in every layer, the time-domain position of the child node correspondence in the tree structure is in the corresponding time-domain position of father node.For example, if CQI report cycle commonly used has 2ms, 10ms, 20ms and 40ms.Then can be expressed as tree structure as shown in Figure 4 to the time-domain resource of CQI subchannel.Each node marked form is " (CQI report cycle, a time-domain position in the CQI report cycle) " among Fig. 4, and the time-domain position of child node correspondence is in the corresponding time-domain position of father node, for example: node (20; 0) time-domain position is in node (10,0), in other words; The time-domain position of father node (10,0) comprises the time-domain position of child node (20,0); In like manner the time-domain position of node (10,2) is also in the time-domain position of node (2,0).In this tree structure, CQI report cycle of each layer correspondence.
In addition, the superiors in the above-mentioned tree structure are corresponding with the minimum common divisor in the CQI report cycle with common divisor.In the middle of the reality, all CQI report cycles possibly have common common divisor, also possibly divide to have later common divisor separately in groups.Explanation through combining Fig. 4 can be found out; If all CQI report cycles have the situation of common divisor; The minimum common divisor of corresponding all the CQI report cycles of the top layer of the tree structure that the time-domain resource of CQI subchannel is represented, as being example among Fig. 4, this minimum common divisor is 2ms.But all CQI report cycles of stipulating in the existing standard agreement usually do not have common divisor.For example, the CQI report cycle has 2ms, 5ms, 10ms, 20ms and 40ms.At this moment; Can the CQI report cycle with common divisor be made up; Above-mentioned tree structure is set up in combination to separately respectively, and for example 2ms, 10ms, 20ms and 40ms have common divisor, and 5ms, 10ms, 20ms and 40ms also have common divisor; And the minimum common divisor of 2ms, 10ms, 20ms and 40ms is 2ms, and the minimum common divisor of 5ms, 10ms, 20ms and 40ms is 5ms.So two set up upright above-mentioned tree structure with this respectively, it is the same to serve as the tree structure set up of basis with shown in Fig. 4 with 2ms, 10ms, 20ms and 40ms.With 5ms, 10ms, 20ms and 40ms serves as that the basic tree structure of setting up is as shown in Figure 5, the rule of having described above all satisfying for each tree structure.
Utilize under the prerequisite that tree structure representes the time-domain resource of CQI subchannel based on above-mentioned; For the CQI subchannel of free time, from the idle time-domain resource of this CQI subchannel Resources allocation give the user concrete realization can for: the interior any corresponding time-domain position of node of layer that CQI report cycle in the tree structure and this user is corresponding distributed to this user; Certainly in order to simplify the method for distribution; Distribution for idle CQI subchannel; Can fix the corresponding time-domain position of predefined locational node is distributed to the user; The for example fixing time-domain position that first node is corresponding is distributed to the user, and perhaps that second node is corresponding time-domain position is distributed to user or the like.
For state is the CQI subchannel that takies; Need to judge whether the CQI subchannel has the idle time-domain resource that can distribute to the user; Specifically be embodied as: in corresponding with this user CQI report cycle layer in tree structure, search the corresponding time-domain resource of the father node that whether has this node layer and child node all less than the node of distribution; This is because in the foundation rule of above-mentioned tree structure; The time-domain position of child node correspondence is in the corresponding time-domain position of father node; If therefore the time-domain position of father node is occupied, then the time-domain position of child node correspondence is also all occupied, if the time domain of child node is occupied; A part that then time-domain position of father node is also occupied at least can not have been reallocated to the user with corresponding C QI report cycle.
Like this; For state is the CQI subchannel that takies, and Resources allocation specifically is embodied as for the user from the idle time-domain resource of this CQI subchannel: corresponding all corresponding less than the node that the distributes time-domain position of time-domain resource of the father node of this node layer that will find and child node is distributed to this user.
CQI report cycle in tree structure and the user corresponding the layer in; Search the corresponding time-domain resource of the father node that whether has this node layer and child node all not the concrete realization of the node of distribution can for: according to predefined order; Successively each node in this layer is searched; Judge whether present node satisfies the corresponding time-domain resource of its father node and child node and all do not distribute, if satisfy then end is searched.Then that this node is corresponding time-domain resource is distributed to the user.
The complexity of searching based on reduction; Shortcut calculation; And more help disposing the consideration of the multiplexing CQI subchannel aspect of user of different CQI report cycles; The above-mentioned corresponding time-domain resource of father node and child node of searching is not all in the process of the node of distribution; Can preferentially search the node that has been assigned with the corresponding time-domain resource of younger brother's father and elder brothers node in the search procedure through setting looked-up sequence, making, and judge whether this node satisfies the corresponding time-domain resource of father node and child node all less than the condition of distribution.For example, tree structure as shown in Figure 5 is if node (20,0) is occupied; Then preferentially search node (20,10), if because not like this, if node (20 for example; 0) occupied, then preferentially search node (20,5), if node (20; 5) satisfy the requirement that distributes, then can the corresponding time-domain position of node (20,5) be distributed to the user, because node (20; 5) occupied, the time-domain position that its father node (10,5) is corresponding also just can not have been reallocated, if but preferentially search with younger brother's father and elder brothers node (20; 10), if after then this node satisfies allocation requirements and distributes to this user, can not make last layer produce the node that to reallocate, thereby more help disposing the multiplexing CQI subchannel of user of different CQI report cycles.
In the above-mentioned example that 2ms, 5ms, 10ms, 20ms and 40ms arranged with the CQI report cycle; The CQI report cycle is that the user of 10ms, 20ms and 40ms is when asking to distribute the CQI resource; Search with minimum common divisor is the node of the tree structure of 5ms foundation; And the cycle that makes is 5ms; The user of 10ms, 20ms and 40ms can multiplexing same CQI subchannel, and the CQI report cycle is user's same subchannel of time division multiplexing separately of 2ms: the CQI subchannel of promptly distributing to the CQI report cycle and be the user of 2ms only allows subsequent allocations user's CQI report cycle also to be 2ms.Can reduce the complexity of searching like this.
By top disclosed technical scheme; But in the knowledge capital inventive embodiments; The method that the embodiment of the invention provides is that first time domain is distributed; Therefore remove to search next CQI subchannel when the time-domain resource of same CQI subchannel can't be distributed this user again, help different user multiplexing to same CQI subchannel, and further reduce the uplink control signaling expense.And; Judging that whether the CQI subchannel satisfies when distributing to user's condition; Also further introduced guaranteeing the condition of the orthogonality between the CQI subchannel, thereby when being implemented in the multiplexing same CQI subchannel of different user, guaranteed the orthogonality between the CQI subchannel.
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; The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
Embodiment three
The embodiment of the invention is also corresponding to provide a kind of communication control unit 600, and as shown in Figure 6, this device comprises:
Judging unit 602 is used to judge whether current C QI subchannel satisfies the requirement of distributing to said user;
In addition, based on the consideration that guarantees orthogonality between the CQI subchannel, the communication control unit 600 that provides in the present embodiment can also comprise,
Acquiring unit 604 is used for the time delay expansion according to the user who sends the CQI resource request, obtains this user's user class time delay spreading parameter;
At this moment, be idle current C QI subchannel for state, judging unit 602 judges whether the front and back user class time delay spreading parameter-1 adjacent C QI subchannel in the RB of this CQI subchannel place is idle or forbidding;
For state is the current C QI subchannel that takies, and the front and back user class time delay spreading parameter-1 adjacent C QI subchannel in judging unit 602 this CQI subchannel place RB can be distributed to user's idle time-domain resource for forbidding and the existence of current C QI subchannel.
Searching unit 601 also is used in the corresponding layer of tree structure and user's CQI report cycle, searching the node that can distribute to said user; Wherein, CQI report cycle of each of this tree structure layer correspondence; Each time-domain position in the corresponding CQI report cycle of each node in every layer, the CQI subchannel time-domain position of the child node correspondence of each node in this tree structure is in the corresponding CQI subchannel time-domain position of father node
Judging unit 602 is judging whether current C QI subchannel satisfies the requirement of distributing to said user and comprise: whether judging unit 602 is judged in the layer corresponding with this user CQI report cycle in the said tree structure of current C QI subchannel exist the corresponding time-domain resource of its father node and child node all less than the node that distributes.
The device that provides in the present embodiment, the working method of its each unit can be with reference to the corresponding description among the inventive method embodiment.
The device that present embodiment provides divides timing to help different user multiplexing to same CQI subchannel carrying out the CQI subchannel, and further, in the possibility that present embodiment provides, can guarantee the orthogonality between the CQI subchannel.This communication control unit can be specially: radio network controller (RNC, Radio Network Controller) or other are used for the control channel assigned unit.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. a channel quality information CQI channel allocation method is characterized in that, comprising:
Time delay expansion according to the user who sends the CQI resource request; Obtain this user's user class time delay spreading parameter, have corresponding relation between the number of the CQI subchannel that plays buffer action that the orthogonality of the cyclic shift between said user's user class time delay spreading parameter and the assurance user is required;
Search the CQI subchannel on all reserved resource piece RB; If current C QI subchannel satisfies the user's who distributes to said transmission CQI resource request requirement; Then Resources allocation is given this user from the idle time-domain resource of current C QI subchannel; If do not satisfy, then continue to search the CQI subchannel on said all reservation RB;
For state is idle current C QI subchannel, and the said satisfied requirement of distributing to said user comprises: the front and back said user class time delay spreading parameter-1 adjacent C QI subchannel in the RB of this CQI subchannel place is idle or forbids;
For state is the current C QI subchannel that takies, and the said satisfied requirement of distributing to said user comprises: the front and back said user class time delay spreading parameter-1 adjacent C QI subchannel in the RB of this CQI subchannel place can be distributed to user's idle time-domain resource for forbidding and this current CQI subchannel existence.
2. method according to claim 1; It is characterized in that; Said method also comprises: after Resources allocation from the idle time-domain resource of current C QI subchannel was given said user, the state of the front and back user class time delay spreading parameter-1 adjacent C QI subchannel in this current CQI subchannel place RB was set to forbidding.
3. method according to claim 1; It is characterized in that; Said satisfied distributing in said user's the requirement; For state is the current C QI subchannel that takies, and the front and back user class time delay spreading parameter-1 adjacent C QI subchannel in the RB of this CQI subchannel place comprises for forbidding: the front and back in the RB of this CQI subchannel place have and only have user class time delay spreading parameter-1 an adjacent CQI subchannel to be forbidding.
4. according to each described method of claim 1-3; It is characterized in that; The said CQI subchannel of searching on all reserved resource piece RB comprises: search in the tree structure of current C QI subchannel with the corresponding layer of this user CQI report cycle in node; Wherein, CQI report cycle of each of said tree structure layer correspondence, each time-domain position in the corresponding said CQI report cycle of each node in every layer, the corresponding CQI subchannel time-domain position of the child node of each node in the said tree structure is in the corresponding CQI subchannel time-domain position of father node.
5. method according to claim 4; It is characterized in that; For state is idle CQI subchannel, and Resources allocation comprises to the user from the idle time-domain resource of this CQI subchannel: CQI report cycle in said tree structure and this user corresponding layer in search the precalculated position the corresponding time-domain resource of node distribute to this user.
6. method according to claim 4; It is characterized in that; For state is the CQI subchannel that takies; Said satisfied distributing in said user's the requirement, said CQI subchannel exists the idle time-domain resource that can distribute to the user to comprise: in the layer corresponding with this user CQI report cycle in said tree structure, exist the corresponding time-domain resource of its father node and child node all less than the node that distributes;
Then said from the idle time-domain resource of CQI subchannel Resources allocation comprise to the user: the time-domain position that its father node and child node is all corresponding less than the node that distributes is distributed to this user.
7. method according to claim 6; It is characterized in that; When the time-domain position that father node and child node is all corresponding less than the node that distributes is distributed to the user, preferentially will satisfy with the corresponding time-domain resource of younger brother's father and elder brothers node being assigned with and the time-domain position of the node correspondence that father node and the corresponding time-domain resource of child node are not all distributed is distributed to this user.
8. communication control unit, this device comprises:
Search the unit, be used to search all and reserve the CQI subchannel on the RB;
Judging unit is used to judge whether current C QI subchannel satisfies the requirement of distributing to the user who sends the CQI resource request;
Allocation units are used for the judged result according to said judging unit, and Resources allocation is given this user from the idle time-domain resource of the CQI subchannel that satisfies the requirement distribute to said user;
Acquiring unit; Be used for time delay expansion according to the user of said transmission CQI resource request; Obtain this user's user class time delay spreading parameter, have corresponding relation between the number of the CQI subchannel that plays buffer action that the orthogonality of the cyclic shift between said user's user class time delay spreading parameter and the assurance user is required;
For state is idle current C QI subchannel, and whether the front and back user class time delay spreading parameter-1 adjacent C QI subchannel in the RB of this CQI subchannel place of said judgment unit judges is idle or forbidding;
For state is the current C QI subchannel that takies, and whether this CQI subchannel of said judgment unit judges satisfies: the front and back user class time delay spreading parameter-1 adjacent C QI subchannel in the RB of this CQI subchannel place is that forbidding and current C QI subchannel exist the idle time-domain resource that can distribute to the user.
9. device according to claim 8 is characterized in that, the said unit of searching also is used in the corresponding layer of tree structure and user's CQI report cycle, searching the node that can distribute to said user; Wherein, CQI report cycle of each of said tree structure layer correspondence; Each time-domain position in the corresponding said CQI report cycle of each node in every layer, the CQI subchannel time-domain position of the child node correspondence of each node in the said tree structure is in the corresponding CQI subchannel time-domain position of father node;
Whether said judgment unit judges current C QI subchannel satisfies the requirement of distributing to said user and comprises: in the said tree structure of judgment unit judges current C QI subchannel in the layer corresponding with this user CQI report cycle, the time-domain resource that whether has its father node and a child node correspondence is all less than the node of distribution.
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