CN102196566A - Method and device for selecting carrier in mobile communication system and user equipment - Google Patents
Method and device for selecting carrier in mobile communication system and user equipment Download PDFInfo
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- CN102196566A CN102196566A CN2010101158279A CN201010115827A CN102196566A CN 102196566 A CN102196566 A CN 102196566A CN 2010101158279 A CN2010101158279 A CN 2010101158279A CN 201010115827 A CN201010115827 A CN 201010115827A CN 102196566 A CN102196566 A CN 102196566A
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Abstract
The embodiment of the invention discloses a method and device for selecting a carrier in a mobile communication system and user equipment. The method comprises the steps of selecting a first carrier set in which the sum of idle business resources can satisfy user equipment (UE) business resource demands according to the idle business resource of each carrier, wherein the first carrier set is used for bearing business information of the UE; and selecting a second carrier set in which the sum of idle control resources can satisfy UE control resource demands from the first carrier set according to the idle control resource of each carrier in the first carrier set, wherein the second carrier set is used for bearing the control information of the UE. By using the invention, the network resources can be saved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to method and apparatus and a kind of subscriber equipment (UE) of selecting carrier wave in the mobile communication system.
Background technology
In order to satisfy the demand of multiple business, the new generation of wireless communication system should provide the high transfer rate of 1Gbps, and this need use bigger bandwidth to carry out message transmission.Yet, because the constraint of physical condition, can't cook up big section continuous frequency spectrum, at present the frequency spectrum that is in different frequency range by polymerization solves the problem of transmission bandwidth, the a plurality of discontinuous frequency spectrums of this polymerization are that the technology of subscriber equipment (UE) service is called carrier aggregation (Carrier Aggregation, CA) technology.
Fig. 1 is the carrier aggregation schematic diagram.
As shown in Figure 1, base station (eNB) combined polymerization 3 carrier waves, be respectively carrier wave A, carrier wave B and carrier wave C.Wherein each carrier wave that is aggregated is called component carrier (Component Carrier, CC), for example carrier wave A is component carrier.For the UE of compatible LTE R8, the maximum bandwidth of each CC is no more than 20MHz.The UE of LTE-A system can carry out message transmission according to the size of traffic carrying capacity on single CC, also can carry out message transmission on a plurality of CC, and the UE of LTE system can only carry out message transmission on single CC.
Although adopting a plurality of CC is that UE service can improve message transmission rate simultaneously, also can correspondingly increase the demand of control channel resource.
Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) carried Downlink Control Information (Downlink Control Information in, DCI), for example schedule information of the schedule information of downlink data transmission, transmitting uplink data and replying/non-replying (ACK/NACK) information to upstream data.If adopting a plurality of CC is same UE service, then in PDCCH, comprise the control signaling information of a plurality of CC, the size of control signaling can be the growth of approximate multiple with the increase of CC quantity.
UE is blind check PDCCH on the CC that is its service, when a plurality of CC serve for this UE, if equal blind check PDCCH then can cause waste of network resources, and the implementation complexity of UE is also higher on each CC, if only PDCCH is carried on the grappling component carrier (Author CC), blind check PDCCH on this Author CC because the control signaling size of PDCCH carrying is bigger, therefore causes PDCCH to block easily then, influence the blind check effect, and then influence communication quality.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is to provide method and apparatus and a kind of subscriber equipment of selecting carrier wave in the mobile communication system, to save Internet resources.
For achieving the above object, the technical scheme of the embodiment of the invention specifically is achieved in that
Select the method for carrier wave in a kind of mobile communication system, this method comprises:
According to the idle traffic stock number of each carrier wave, select idle traffic stock number sum can satisfy the first carrier set of user equipment (UE) service resources demand, this first carrier is gathered the business information that is used to carry this UE;
According to the free time control stock number of each carrier wave in the first carrier set, from this first carrier set, select idle control stock number sum can satisfy second carrier set of UE control resource requirement, this second carrier set is used to carry the control information of this UE.
Select the device of carrier wave in a kind of mobile communication system, this device comprises that first selects module and second to select module;
Described first selects module, according to the idle traffic stock number of each carrier wave, selects idle traffic stock number sum can satisfy the first carrier set of user equipment (UE) service resources demand, and this first carrier is gathered the business information that is used to carry this UE;
Described second selects module, free time control stock number according to each carrier wave in the first carrier set, select idle control stock number sum can satisfy second carrier set of UE control resource requirement from this first carrier set, this second carrier set is used to carry the control information of this UE.
A kind of subscriber equipment, this UE comprise first receiver module and second receiver module;
Described first receiver module receives business information on the carrier wave in the first carrier set, and described first carrier set is selected according to the idle traffic stock number of each carrier wave and the service resources demand of this UE by network side;
Described second receiver module, receive the control information of each carrier wave in the first carrier set on the carrier wave in second carrier set, described second carrier set is selected according to the free time control stock number of each carrier wave in the first carrier set and the control resource requirement of this UE by network side.
As seen, the present invention at first according to the idle traffic resource situation of each CC, utilizes the business information of less CC carrying UE as far as possible, thereby reduces the demand of UE to the control resource when selecting carrier wave (CC), has saved Internet resources; And, compare with the control information of on each CC, carrying this CC in the prior art, the present invention is by selecting part CC in all CC of bearer service information, make the CC that selects to satisfy the control resource requirement of this UE, bear control information on this CC that selects, can also reduce the number of times that UE carries out blind Detecting, reduce the complexity of UE.
Description of drawings
Fig. 1 is the carrier aggregation schematic diagram.
Fig. 2 is a method flow diagram of selecting carrier wave in the mobile communication system provided by the invention.
Fig. 3 is the general flow chart of the preferred embodiment of CC system of selection provided by the invention.
Fig. 4 provided by the inventionly carries out the method flow diagram of business information transmission for UE selects single CC.
Fig. 5 is the first resource allocation schematic diagram provided by the invention.
Fig. 6 provided by the inventionly carries out the method flow diagram of business information or control information transmission for UE selects a plurality of CC.
Fig. 7 is the second resource allocation schematic diagram provided by the invention.
Fig. 8 is a structure drawing of device of selecting carrier wave in a kind of mobile communication system provided by the invention.
Fig. 9 is user device architecture figure provided by the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 2 is a method flow diagram of selecting carrier wave in the mobile communication system provided by the invention.
As shown in Figure 2, this method comprises:
The business information that the first carrier set of selecting in this step is used to carry this UE;
Second carrier set of selecting in this step is used to carry the control information of this UE.
Wherein, can select the idle traffic stock number can satisfy the single carrier wave of UE service resources demand, the first carrier set is made up of a single carrier wave of selecting.
When the idle traffic stock number that has plural single carrier wave can satisfy UE service resources demand, select idle control resource can satisfy the single carrier wave of this UE control resource requirement from this plural single carrier wave, the first carrier set and second carrier set are made up of a single carrier wave that satisfies this UE service resources demand and control resource requirement.
When the number of the single carrier wave that satisfies this UE service resources demand and control resource requirement at two when above, therefrom select to be used to form the single carrier wave of the first carrier set and second carrier set according to channel quality.
When not existing the idle traffic stock number can satisfy the single carrier wave of UE service resources demand, select carrier wave successively according to the order that the idle traffic stock number is descending, idle traffic stock number sum until all carrier waves of selecting can satisfy UE service resources demand, forms this first carrier set by all carrier waves of selecting.
Select idle control stock number can satisfy the single carrier wave of the required control resource of UE from the first carrier set, second carrier set is made up of a single carrier wave of selecting.Particularly, whether judge in each carrier wave of first carrier set exists the current idle control stock number of single carrier wave to satisfy the required control resource of UE, if, select this single carrier wave, if not, increase the current idle control stock number of carrier wave in the first carrier set, return the action of described judgement.The free time control stock number of this single carrier wave of selecting is updated to free time control stock number after the increase, the free time control stock number of other carrier waves in the first carrier set is remained free time control stock number before increasing.
When not existing idle control stock number can satisfy the single carrier wave of the required control resource of UE, select carrier wave successively according to the descending order of free time control stock number, can satisfy the required control resource of UE until the free time of all carrier waves of selecting control stock number sum, form this second carrier set by all carrier waves of selecting.
When the current idle control stock number sum of all carrier waves all can not satisfy the required control resource of UE in first carrier set, increase the current idle control resource of carrier wave in the first carrier set, select carrier wave successively according to the descending order of free time control stock number after increasing, can satisfy the required control resource of UE until the free time of all carrier waves of selecting control stock number sum, form this second carrier set by these all carrier waves of selecting.
When the current idle control stock number sum of all carrier waves all can not satisfy the required control resource of UE in first carrier set, free time of the carrier wave in second carrier set control stock number is updated to free time control stock number after the increase, the free time control stock number of the carrier wave except that second carrier set in the first carrier set is remained increases the preceding free time and control stock number.
The present invention specifically increases the free time control resource of this carrier wave by the OFDM symbol time that increases carrier wave.
The initial Resource Block RE numbering of the control resource of carrier wave is the integral multiple of the corresponding number of resources of this control information in second carrier set that the control information of carrier wave takies in the first carrier set, in the first carrier set in the control resource of control information continuous bearing carrier wave in second carrier set of a carrier wave.
In the first carrier set in the control resource of the carrier index of a carrier wave and control information continuous bearing carrier wave in second carrier set, so that UE identification control information is at which carrier wave.
The present invention is when considering the system performance gain that the CA technology is brought, also considered its implementation complexity, on system performance gain and implementation complexity, compromise, concrete grammar is the first carrier set of selecting bearer service information earlier according to the service resources demand of UE, also claim descending CC set, reduce the demand of UE by choosing the CC bearer service information of trying one's best few to the control resource, and then the control information of from descending CC set, selecting second carrier set to be used to carry this UE, this second carrier set also can be described as PDCCH monitoring set, because PDCCH monitoring set is the subclass of descending CC set, therefore UE need not carry out blind Detecting on all descending CC usually, only need on the CC in the PDCCH monitoring set, carry out blind Detecting and get final product, thereby reduce the implementation complexity of UE.
When PDCCH monitoring set was contained in descending CC set fully, UE need dispatch each CC by striding the carrier dispatching technology, and the carrier dispatching of striding wherein is a prior art, does not give unnecessary details herein.
The present invention selects CC by network side, selects CC by base station (NodeB) usually, when it selects CC mainly based on following several principles:
Principle one when the descending CC that determines UE gathers, according to the idle traffic resource situation of each CC, is utilized less CC to satisfy the service resources demand of this UE as far as possible, thereby is reduced the demand of UE to the control resource.
Principle two, when the PDCCH monitoring set of determining UE, according to the free time control resource situation of each CC and the OFDM symbol time that takies in the descending CC set, make under the situation of the OFDM symbol time that does not increase the control resource occupation that the CC number that comprises in the PDCCH monitoring set is minimum as far as possible, if the free time control resource sum of all CC in the descending CC set does not satisfy the control resource requirement of this UE, then increase the control resource domains of CC in the descending CC set, and to add the CC number that makes the PDCCH monitoring comprise in gathering under the situation of control resource domains minimum reducing as far as possible by the OFDM symbol time that increases the control resource occupation.Comprise few CC that tries one's best by making in the PDCCH monitoring set, can reduce UE blind Detecting number of times, reduce the UE implementation complexity, improved the utilance of control resource simultaneously.
Principle three, when selecting descending CC set or PDCCH monitoring set, if there are a plurality of CC to satisfy condition, the measured CC of selective channel matter that then tries one's best, thus improve the message transmission reliability.
In the CA technology, what of the required control resource of UE are depended on the CC number for the UE service to a great extent, and are the service resources demand that the CC number of UE service depends on UE.With Physical Downlink Shared Channel (Physical Downlink Share Channel, PDSCH) scheduling of resource is an example, if UE adopts the CC of 2 same band to go up service data transmission, then no matter be on 1 or 2 CC, to send PDCCH, the running time-frequency resource that all must comprise each CC in DCI information takies the bitmap (Bitmap) of situation, control signaling size when therefore adopting 2 CC service data transmissions will be 2 times of control signaling size when adopting 1 CC service data transmission, and the required control stock number of this UE also will double; In addition, consider from the angle of UE implementation complexity, for the situation that adopts 2 CC service data transmissions, if UE sends PDCCH respectively on each CC, UE needs to carry out the PDCCH blind Detecting respectively on a CC so, and the blind Detecting number of times will be 2 times of the single CC service data transmission of employing.
Based on above-mentioned analysis, the present invention is when being the UE distributing radio resource, at first carry out the distribution of service resources, it is allocation of downlink CC set, and then control the distribution of resource, promptly distribute PDCCH monitoring set, and, from descending CC set, select PDCCH monitoring set, make that PDCCH monitoring set is the subclass of descending CC set.Preferably, select single CC to be used for service resources transmission and the control resource transmission of UE as far as possible.
Fig. 3 is the general flow chart of the preferred embodiment of CC system of selection provided by the invention.
As shown in Figure 3, this method comprises:
In this step, from the service resources demand that both satisfies UE also satisfies the CC of control resource requirement of UE, select a CC, select according to the channel quality of CC usually, the accuracy of transmitting with guarantee information for this UE service.
Step 303 judges whether a plurality of CC associatings can satisfy the resource requirement of UE, if, execution in step 304, otherwise CC selects failure, process ends.
In this step, judge the service resources demand that when a plurality of CC unite, whether can both satisfy UE, can satisfy the control resource requirement of UE again, service resources demand and the control resource requirement of UE if current all CC that can utilize of this UE join together can not satisfy, then CC selects failure.
Step 304 is determined the descending CC set of UE.
Step 305 is selected PDCCH monitoring set from the descending CC set of UE, CC selects successfully, process ends.
After the LTE-A system introduces the CA technology, will carry out the scheduling of resource by base station (eNB) centralizedly.Wherein, writing down the resource operating position of each CC among the eNB, eNB divides the CC that is used in transport service information and/or control information according to the ability of service quality (Qos), traffic carrying capacity, wireless channel conditions and the UE of the resource operating position of each CC and customer service etc. for UE.
According to the method for Fig. 3, UE preferentially adopts single CC to carry out business information transmission and control information is transmitted, if adopt the single CC can't transport service information or control information, and UE possesses the CA ability again, then adopts a plurality of CC transport service information or control information.Below respectively to the method for UE in single CC enterprising industry affair information or control information transmission, and UE describes in the method for a plurality of CC enterprising industry affair information or control information transmission.
Fig. 4 provided by the inventionly carries out the method flow diagram of business information transmission for UE selects single CC.
As shown in Figure 4, this method comprises:
Step 401 is carried out descending according to what of idle traffic stock number to each CC, judges whether to exist the CC of idle traffic resource greater than UE service resources demand, if, execution in step 402, otherwise adopt a plurality of CC to provide service for UE.
Whether step 402 for the CC that step 401 is elected, is judged under the situation that does not increase CC control resource domains size, exist idle control resource can satisfy the CC of the control resource requirement of UE, if, execution in step 403, if not, execution in step 404.
The OFDM symbol time that the carrier bandwidths of control resource domains=this CC of CC * this CC takies in this step.
Step 403 is from not only satisfying UE service resources demand but also satisfying the CC of UE control resource requirement and select a CC to transmit business information and the control information of this UE.
In this step,, then from these a plurality of CC, select channel quality CC preferably, to improve the message transmission accuracy of UE if having a plurality of CC not only to satisfy the service resources demand of UE but also satisfy the control resource requirement of UE.
Step 404 for the CC that step 401 is elected, is judged under the situation that increases CC control resource domains size, whether has the CC that can satisfy UE control resource requirement, if execution in step 405 if not, adopts a plurality of CC to provide service for UE.
Step 405 is selected the control resource domains to increase minimum CC from the CC that satisfies UE control resource requirement and is provided service for UE,
In this step, if a plurality of CC are arranged after increasing the control resource domains, not only satisfy the service resources demand of UE but also satisfied the control resource requirement of UE, then from these a plurality of CC, select the control resource domains to increase minimum CC, if it is minimum to exist the control resource domains of plural CC to increase, then from this plural CC the top-quality CC of selective channel as the final service CC of UE.
Be example with Fig. 5 below, the method for selecting single CC to be used for business information and control information transmission is described.
Fig. 5 is the first resource allocation schematic diagram provided by the invention.
Among Fig. 5, eNB one combined polymerization carrier wave A, carrier wave B and carrier wave C totally 3 CC, the control resource of each CC and the distribution condition of service resources are represented with having the huge of isolabeling not: have the control resource that the rectangle representative of the miter angle oblique line that is tilted to the left has taken, the still unappropriated control resource of rectangle representative that has circle, the service resources that blank rectangle representative has taken, have the still unappropriated service resources of rectangle representative of curve, red arrow is represented the indexical relation of PDCCH and PDSCH.It should be noted that the idling-resource that refers to here and occupied resource do not comprise reference signal (Reference Signal, RS) Resource Unit of place time-frequency lattice correspondence (Resource Element, RE).In addition, in order to reduce the complexity of UE blind Detecting, the resource of PDCCH is mapped with certain rule in LTE, and promptly the RE of original position numbering must be the integral multiple of the corresponding number of resources of PDCCH.Therefore, in integral body control resource inside, occupied resource and vacant resource all are discrete distribution.The resource of PDSCH is mapped with two kinds of centralized mapping and distributed mapping in LTE, and by Bitmap indexed resource distribution condition.In order to clearly illustrate resource allocation conditions, occupied resource and vacant resource are all represented with continuous resource among Fig. 5, those skilled in the art should be able to be clear and definite, occupied resource in the practical application and vacant resource all may be discontinuously arranged, and, when discontinuously arranged vacant control transmitted over resources PDCCH, each PDCCH can only be carried on one section successive control resource, and the original position RE numbering that each PDCCH takies on the control resource should be the integral multiple of the corresponding number of resources of this PDCCH.
Among Fig. 5, eNB is that UE selects CC according to the resource requirement of UE and the available resources situation of 3 CC.At first, relatively the service resources demand of UE and the idle traffic stock number of 3 CC are found the service resources demand of the idle traffic resource of carrier wave B and carrier wave C greater than UE.Next carrier wave B and carrier wave C are further screened, find out the CC that satisfies UE control resource requirement.
In carrier wave B and C, be used to control resource if select carrier wave C then to need to increase extra OFDM symbol time, the control resource domains that promptly increases carrier wave C could satisfy the control resource requirement of UE, and the control resource domains that does not need to increase carrier wave B can satisfy the control resource requirement of UE, therefore select the service CC of carrier wave B, thereby finished the CC selection course as UE.
Wherein, the control resource part of carrier wave is variable in time, may take 1,2 or 3 OFDM symbol times, and the OFDM symbol time of carrier occupancy is indicated by PCFICH.In the control resource part, the OFDM symbol time that does not transmit control message can be mapped to PDSCH, so when carrying out the CC selection according to the control resource, should be advisable not increase the OFDM symbol time.
According to the regulation of 3GPP, in the CA technology, when adopting single carrier wave to be the UE service, UE that can back compatible LTE R8 avoids striding the situation of carrier dispatching (Cross-Carrier Scheduling), improves system compatibility.Striding carrier dispatching and be meant to be that PDSCH is mapped on the CC wherein, and PDCCH is mapped on the different CC of another one.
Fig. 6 provided by the inventionly carries out the method flow diagram of business information or control information transmission for UE selects a plurality of CC.
At first, be defined in the set that provides the CC of service to constitute for UE on the down direction and be " descending CC set "." descending CC set " is that UE is specific, and promptly there is such set in the UE to each CA transmission, and " the descending CC set " of different UEs may be different.If UE is indicated by the PDCCH on the identical CC at the PDSCH on each CC, UE needs the number of times of blind Detecting to be directly proportional with the number of CC in " descending CC set ", causes the significantly increase of blind Detecting number of times, and the UE implementation complexity is higher.If the PDCCH of all CC goes up transmission in anchor carrier (Anchor CC) in UE " descending CC set ", the UE blind Detecting only needs to carry out on Anchor CC like this, can significantly reduce the blind Detecting number of times, but adopt Anchor CC to carry the blocking probability that PDCCH on all CC can increase PDCCH, promptly on single CC, distribute the success rate of a large amount of PDCCH resources not high, and the CC number in the descending CC set is many more, and the PDCCH blocking probability is big more.
Based on considering that as above the present invention has introduced PDCCH monitoring set, PDCCH monitoring set is the subclass of descending CC set, and UE carries out transmitting on the CC of PDCCH in PDCCH monitoring set of CA transmission.Therefore, when UE transmitted on a plurality of CC, the main task of eNB was to determine descending CC set and the PDCCH monitoring set of UE, thereby can obtain compromise neatly between blind Detecting complexity and PDCCH blocking probability.
Referring to Fig. 6, this method comprises:
In this step, be specially UE and distribute how many service resources can satisfy the demand of UE, depend on traffic carrying capacity and the parameters such as channel condition and Qos of UE.
In this step, if can satisfy the service resources demand of UE, so the promising UE descending CC set that provides the CC of service resources to constitute UE jointly, so far just determined the descending CC set of UE, the service resources demand of UE if all CC of eNB join together can not satisfy, then CC selects failure, process ends.
After the descending CC set of UE was determined, ensuing task was to determine the PDCCH monitoring set of UE.When the PDCCH monitoring set of determining UE,, should keep the PDCCH monitoring set of UE minimum in order to reduce the blind Detecting number of times of UE as far as possible.
If in the descending CC set of UE m CC arranged, the bandwidth of each CC is respectively W
i(i=1,2 ..., m), idle control stock number is respectively K
i(i=1,2 ..., m), the OFDM symbol time that takies is respectively S
i(1≤S
i≤ 3, i=1,2 ..., m).Each CC in the PDCCH monitoring set of UE needs the PDCCH resource to be used to refer to the resource allocation conditions of PDSCH, and establishing and indicating the control resources requirement of the PDSCH resource of distributing to current UE on each CC is R
i(i=1,2 ..., m).The present invention is according to K
1, K
2..., K
mAnd R
1, R
2..., R
mDetermine the PDCCH monitoring set of UE,, specifically see also step 603～608 by preferentially on the many CC of free time control resource, making the size of the PDCCH monitoring set of UE keep minimum for UE distributes required control resource.
Step 604 is with the R after the ordering
1, R
2..., R
mAccording to the descending K after descending successively
i(i=1,2 ..., m) the middle filling.
In this step, can adopt the R after knapsack algorithm will sort
1, R
2..., R
mAccording to the descending K after descending successively
i(i=1,2 ..., m) the middle filling, wherein, knapsack algorithm is a prior art, does not give unnecessary details herein.
In the flow process of Fig. 6, execution in step 604 is to control under the constant situation of resource in the free time of each CC to carry out for the first time, if under the situation that does not increase the idle control of CC resource size, all CC associatings in the descending CC set all can not be satisfied the control resource requirement of UE, then need to increase by execution in step 606～608 the free time control resource of CC, can the CC in rejudging descending CC set satisfy the control resource requirement of UE then.
Under the situation of the free time control resource that is increasing CC, if the CC in the descending CC set can satisfy the control resource requirement of UE, then for having filled R
i(i=1,2 ..., K m)
i(i=1,2 ..., m), keep this K
i(i=1,2 ..., m) for the value after upgrading, for not filling R
i(i=1,2 ..., K m)
i(i=1,2 ..., m), keep this K
i(i=1,2 ..., m) be initial value.
Step 605 is judged ∑
I=1 mK
iCan satisfy ∑
I=1 mR
iDemand, if then select to have filled R
i(i=1,2 ..., K m)
i(i=1,2 ..., m) pairing CC is used to send PDCCH, promptly by having filled R
i(i=1,2 ..., K m)
i(i=1,2 ..., m) pairing CC constitutes PDCCH monitoring set, process ends, otherwise execution in step 606.
Step 606 judges whether to exist S
i＜3 (i=1,2 ..., m), if, execution in step 607, otherwise failure, process ends are selected in PDCCH monitoring set.
Step 607 is upgraded S
i
In this step, for less than 3 S
i, make S
i'=S
i+ 1 (i=1,2 ..., m), use S
i' renewal S
i, equal 3 S
iRemain unchanged.
Step 608 is utilized W
iWith the S that upgrades in the step 607
iRecomputate the free time control resource K of each CC in the descending CC set of UE
i' (i=1,2 ..., m), utilize K
i' (i=1,2 ..., m) upgrade K
i(i=1,2 ..., m), return step 603.
Among Fig. 6, for the K after the ordering
i(i=1,2 ..., m) Dui Ying CC utilizes knapsack algorithm with R according to order from big to small
1, R
2..., R
mTo wherein filling, purpose be on this CC for UE distributes resource as much as possible, thereby guarantee the PDCCH monitoring set minimum of UE, termination condition is that the required control resource allocation of UE is finished or K
i(i=1,2 ..., m) by till the traversal.If the required control resource allocation success of UE, the PDCCH of UE monitoring set also just has been determined so; If traveled through K
i(i=1,2 ..., m) back UE is not assigned to enough resources yet, CC selection course failure so.It should be noted that and filling R
1, R
2..., R
mThe time must satisfy the criterion of PDCCH resource mapping, promptly the resource original position must be the integral multiple of this PDCCH resource requirement amount.
Be example with Fig. 7 below, the method for selecting a plurality of CC to be used for business information and control information transmission is described.
Fig. 7 is the second resource allocation schematic diagram provided by the invention.
Same Fig. 5 of the method for expressing of service resources among Fig. 7.
Under the resource allocation conditions of Fig. 7, at first be UE distribution service resource.Among Fig. 7, the descending order of idle traffic stock number of three carrier waves is carrier wave C＞carrier wave B＞carrier wave A, therefore begins to be followed successively by UE distribution service resource carrier wave from carrier wave C.Find that by calculating carrier wave C and carrier wave B can unite the service resources demand that satisfies UE, determine that therefore the descending CC set of UE is { carrier wave C, carrier wave B}.
Next on carrier wave C and carrier wave B, distribute the control resource for UE.According to the control resource requirement of UE and the free time control stock number of carrier wave C and carrier wave B, discovery is under the situation of the OFDM symbol numbers that does not increase the control resource occupation, carrier wave B can satisfy the control resource requirement of UE, therefore the PDCCH monitoring set of determining UE is { carrier wave B}, promptly scheduling carrier wave B and carrier wave C are the service resources that UE distributes on carrier wave B, so far, finished and be the whole resource allocation process of this UE.
Fig. 8 is a structure drawing of device of selecting carrier wave in a kind of mobile communication system provided by the invention.
As shown in Figure 8, this device comprises that first selects module 801 and second to select module 802.
First selects module 801, according to the idle traffic stock number of each carrier wave, selects idle traffic stock number sum can satisfy the first carrier set of user equipment (UE) service resources demand, and this first carrier is gathered the business information that is used to carry this UE.
Second selects module 802, free time control stock number according to each carrier wave in the first carrier set, select idle control stock number sum can satisfy second carrier set of UE control resource requirement from this first carrier set, this second carrier set is used to carry the control information of this UE.
The first selection module 801 wherein can select the idle traffic stock number can satisfy the single carrier wave of UE service resources demand, forms the first carrier set by a single carrier wave of selecting.
First selects module 801, can also be when not existing the idle traffic stock number can satisfy the single carrier wave of UE service resources demand, select carrier wave successively according to the order that the idle traffic stock number is descending, idle traffic stock number sum until all carrier waves of selecting can satisfy UE service resources demand, forms the first carrier set by all carrier waves of selecting.
The second selection module 802 wherein selects idle control stock number can satisfy the single carrier wave of the required control resource of UE from the first carrier set, and second carrier set is made up of a single carrier wave of selecting.
Second selects module 802, can be when not existing idle control stock number can satisfy the single carrier wave of the required control resource of UE, select carrier wave successively according to the descending order of free time control stock number, can satisfy the required control resource of UE until the free time of all carrier waves of selecting control stock number sum, form this second carrier set by all carrier waves of selecting.
Second selects module 802, in the time of can also all can not satisfying the required control resource of UE in the current idle control stock number sum of all carrier waves in the first carrier set, increase the current idle control resource of carrier wave in the first carrier set, select carrier wave successively according to the descending order of free time control stock number after increasing, can satisfy the required control resource of UE until the free time of all carrier waves of selecting control stock number sum, form this second carrier set by these all carrier waves of selecting.
Usually the described device of Fig. 8 is arranged among the eNB.
The present invention also provides a kind of subscriber equipment of supporting the inventive method and the described device of Fig. 8, specifically please participate in Fig. 9.
Fig. 9 is user device architecture figure provided by the invention.
As shown in Figure 9, this subscriber equipment comprises first receiver module 901 and second receiver module 902.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (22)
1. select the method for carrier wave in the mobile communication system, it is characterized in that this method comprises:
According to the idle traffic stock number of each carrier wave, select idle traffic stock number sum can satisfy the first carrier set of user equipment (UE) service resources demand, this first carrier is gathered the business information that is used to carry this UE;
According to the free time control stock number of each carrier wave in the first carrier set, from this first carrier set, select idle control stock number sum can satisfy second carrier set of UE control resource requirement, this second carrier set is used to carry the control information of this UE.
2. method according to claim 1 is characterized in that, the first carrier set that described selection idle traffic stock number sum can satisfy UE service resources demand comprises:
Select the idle traffic stock number can satisfy the single carrier wave of UE service resources demand, the first carrier set is made up of a single carrier wave of selecting.
3. method according to claim 2, it is characterized in that, when the idle traffic stock number that has plural single carrier wave can satisfy UE service resources demand, select idle control resource can satisfy the single carrier wave of this UE control resource requirement from this plural single carrier wave, the first carrier set and second carrier set are made up of a single carrier wave that satisfies this UE service resources demand and control resource requirement.
4. method according to claim 3, it is characterized in that, when the number of the single carrier wave that satisfies this UE service resources demand and control resource requirement at two when above, therefrom select to be used to form the single carrier wave of the first carrier set and second carrier set according to channel quality.
5. method according to claim 2 is characterized in that,
When not existing the idle traffic stock number can satisfy the single carrier wave of UE service resources demand, select carrier wave successively according to the order that the idle traffic stock number is descending, idle traffic stock number sum until all carrier waves of selecting can satisfy UE service resources demand, forms this first carrier set by all carrier waves of selecting.
6. method according to claim 5 is characterized in that, described second carrier set of selecting idle control stock number sum can satisfy UE control resource requirement from this first carrier set comprises:
Select idle control stock number can satisfy the single carrier wave of the required control resource of UE from the first carrier set, second carrier set is made up of a single carrier wave of selecting.
7. method according to claim 6 is characterized in that, the described single carrier wave of selecting idle control stock number can satisfy UE control resource requirement from the first carrier set comprises:
Whether judge in each carrier wave of first carrier set exists the current idle control stock number of single carrier wave to satisfy the required control resource of UE, if select this single carrier wave, if not, increase the current idle control stock number of carrier wave in the first carrier set, return the action of described judgement.
8. method according to claim 7 is characterized in that,
The free time control stock number of this single carrier wave of selecting is updated to free time control stock number after the increase, the free time control stock number of other carrier waves in the first carrier set is remained free time control stock number before increasing.
9. method according to claim 6 is characterized in that,
When not existing idle control stock number can satisfy the single carrier wave of the required control resource of UE, select carrier wave successively according to the descending order of free time control stock number, can satisfy the required control resource of UE until the free time of all carrier waves of selecting control stock number sum, form this second carrier set by all carrier waves of selecting.
10. method according to claim 9 is characterized in that,
When the current idle control stock number sum of all carrier waves all can not satisfy the required control resource of UE in first carrier set, increase the current idle control resource of carrier wave in the first carrier set, select carrier wave successively according to the descending order of free time control stock number after increasing, can satisfy the required control resource of UE until the free time of all carrier waves of selecting control stock number sum, form this second carrier set by these all carrier waves of selecting.
11. method according to claim 10 is characterized in that,
When the current idle control stock number sum of all carrier waves all can not satisfy the required control resource of UE in first carrier set, free time of the carrier wave in second carrier set control stock number is updated to free time control stock number after the increase, the free time control stock number of the carrier wave except that second carrier set in the first carrier set is remained increases the preceding free time and control stock number.
12. according to claim 7 or 8 or 10 or 11 described methods, it is characterized in that,
Increase the free time control resource of this carrier wave by the OFDM symbol time that increases carrier wave.
13., it is characterized in that the control information that this second carrier set is used to carry this UE comprises according to the described method of the arbitrary claim of claim 1 to 11:
The initial Resource Block RE numbering of the control resource of carrier wave is the integral multiple of the corresponding number of resources of this control information in second carrier set that the control information of carrier wave takies in the first carrier set, in the first carrier set in the control resource of control information continuous bearing carrier wave in second carrier set of a carrier wave.
14. method according to claim 13 is characterized in that, in the first carrier set in the control resource of the carrier index of a carrier wave and control information continuous bearing carrier wave in second carrier set.
15. select the device of carrier wave in the mobile communication system, it is characterized in that this device comprises that first selects module and second to select module;
Described first selects module, according to the idle traffic stock number of each carrier wave, selects idle traffic stock number sum can satisfy the first carrier set of user equipment (UE) service resources demand, and this first carrier is gathered the business information that is used to carry this UE;
Described second selects module, free time control stock number according to each carrier wave in the first carrier set, select idle control stock number sum can satisfy second carrier set of UE control resource requirement from this first carrier set, this second carrier set is used to carry the control information of this UE.
16. device according to claim 15 is characterized in that,
Described first selects module, selects the idle traffic stock number can satisfy the single carrier wave of UE service resources demand, forms the first carrier set by a single carrier wave of selecting.
17. device according to claim 16 is characterized in that,
Described first selects module, when not existing the idle traffic stock number can satisfy the single carrier wave of UE service resources demand, select carrier wave successively according to the order that the idle traffic stock number is descending, idle traffic stock number sum until all carrier waves of selecting can satisfy UE service resources demand, forms the first carrier set by all carrier waves of selecting.
18. device according to claim 17 is characterized in that,
Described second selects module, selects idle control stock number can satisfy the single carrier wave of the required control resource of UE from the first carrier set, and second carrier set is made up of a single carrier wave of selecting.
19. device according to claim 18 is characterized in that,
Described second selects module, when not existing idle control stock number can satisfy the single carrier wave of the required control resource of UE, select carrier wave successively according to the descending order of free time control stock number, can satisfy the required control resource of UE until the free time of all carrier waves of selecting control stock number sum, form this second carrier set by all carrier waves of selecting.
20. device according to claim 19 is characterized in that,
Described second selects module, when the current idle control stock number sum of all carrier waves all can not satisfy the required control resource of UE in first carrier set, increase the current idle control resource of carrier wave in the first carrier set, select carrier wave successively according to the descending order of free time control stock number after increasing, can satisfy the required control resource of UE until the free time of all carrier waves of selecting control stock number sum, form this second carrier set by these all carrier waves of selecting.
21. a user equipment (UE) is characterized in that, this UE comprises first receiver module and second receiver module;
Described first receiver module receives business information on the carrier wave in the first carrier set, and described first carrier set is selected according to the idle traffic stock number of each carrier wave and the service resources demand of this UE by network side;
Described second receiver module, receive the control information of each carrier wave in the first carrier set on the carrier wave in second carrier set, described second carrier set is selected according to the free time control stock number of each carrier wave in the first carrier set and the control resource requirement of this UE by network side.
22. UE according to claim 21 is characterized in that,
Described second receiver module by carrying out blind Detecting on each carrier wave in second carrier set, receives the control information of each carrier wave in the first carrier set.
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Application publication date: 20110921 |