WO2011147295A1 - 一种承载业务的方法、装置及系统 - Google Patents
一种承载业务的方法、装置及系统 Download PDFInfo
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- WO2011147295A1 WO2011147295A1 PCT/CN2011/074511 CN2011074511W WO2011147295A1 WO 2011147295 A1 WO2011147295 A1 WO 2011147295A1 CN 2011074511 W CN2011074511 W CN 2011074511W WO 2011147295 A1 WO2011147295 A1 WO 2011147295A1
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- 239000000969 carrier Substances 0.000 claims description 33
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- 230000008569 process Effects 0.000 claims description 11
- 238000012216 screening Methods 0.000 claims description 10
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 238000013468 resource allocation Methods 0.000 description 13
- 238000004422 calculation algorithm Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000004590 computer program Methods 0.000 description 6
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
Definitions
- the present invention relates to the field of communications, and in particular, to a method, device and system for carrying a service. Background technique
- the network side performs resource allocation for user equipment (UE) (including resource changes triggered by new access/handover/other algorithms).
- UE user equipment
- candidate resources including carrier resources and time slot resources
- resource allocation is attempted one by one from the highest priority candidate resources.
- Carrier priority queues and slot priority queues are calculated in the following three ways:
- For uplink Based on the Received Total Wideband Power (RTWP) or Interference Signal Code Power (ISCP) ordering;
- RWP Received Total Wideband Power
- ISCP Interference Signal Code Power
- TCP Transmitted Carrier Power
- TCP Transmitted Carrier Power
- the priority queue of the carrier is first calculated by the uplink and downlink weighting, and then the time slot priority queue of each carrier is obtained.
- the power factor of each time slot of carrier 1 is P11, P12, P13, P14, P15, P16
- the power factor of each time slot of carrier 2 is P21, P22, P23, P24, P25, P26, and time slots 1 and 2
- the carrier SD uplink weighting factor is configured as Beta.
- the existing SDCA (Slow Dynamic Channel Allocation) algorithm uses the following methods to weight the carrier:
- the priority of carrier 1 and carrier 2 is ranked from low to high according to the values of P1 and P2;
- the priority of the time slot in each carrier is ranked according to the power factor value of each time slot from low to high, and no weighting is required.
- the priority of the carrier and the priority calculation of the time slot are separated, that is, when the system resources are allocated, the carrier resources are first determined and the time slot resources are determined;
- Embodiments of the present invention provide a method, device, and system for carrying a service, which are used to improve resource allocation. Rationality of the allocation to improve the quality of the system business.
- a method of carrying a service including:
- Ni time slots whose interference state meets the first preset condition where Ni is used to represent the total time slot required for carrying the to-be-accessed service.
- a device for carrying a service comprising:
- a screening unit configured to select, according to the to-be-accessed service requested by the terminal side, a Ni time slot in which the interference state meets the first preset condition, where the Ni is used to represent the to-be-accessed service The total number of time slots required;
- a generating unit configured to perform weighting processing on the corresponding carriers according to the Ni time slots selected for each carrier, to generate a first carrier priority queue
- the bearer unit is configured to perform bearer access to the to-be-accessed service according to the first carrier priority queue.
- a system for carrying a service comprising a plurality of base stations, wherein the base station is configured to select, according to the to-be-accessed service requested by the terminal side, respectively, for each carrier, Ni time slots whose interference state meets the first preset condition, where Ni And ???charging the total number of time slots required for carrying the service to be accessed, and weighting the corresponding carriers according to the Ni time slots selected for each carrier, generating a first carrier priority queue, and according to The first carrier priority queue performs bearer access to the to-be-accessed service.
- the base station filters the candidate time slot resources according to the number of time slots required by the terminal side to be accessed, and selects N carriers whose interference conditions meet the preset conditions. After the weighting, the priority queues of the candidate carriers and the time slots are determined at the same time, and the access queues are accessed according to the priority queues, so that the terminal to be accessed is requested.
- the actual resource requirements of the service optimize the resource allocation on the system side, and the theoretically optimal resources can be provided to the terminal side, thereby improving the service quality.
- FIG. 1 is a schematic structural diagram of a system architecture of a TD-SCDMA system according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a base station in an embodiment of the present invention.
- FIG. 3 is a flowchart of a base station carrying a service to be accessed according to an embodiment of the present invention
- FIG. 4 is a schematic diagram of system resources in an embodiment of the present invention. detailed description
- the system resource ordering is divided into two steps, that is, the carrier is sorted first and then the slot is sorted.
- all time slots included in the carrier are weighted to obtain a carrier priority sequence.
- One problem with this is that it may affect the priority of the entire carrier due to the poor time slot of the carrier, but the interference of other time slots of the carrier is small and enough to accommodate new services.
- a system for carrying a service includes a plurality of base stations 10 and a UE 11, and the base station 10 is configured to perform services according to the UE 11 to be accessed.
- a carrier respectively selecting Ni time slots whose interference states meet the first preset condition, wherein Ni is used to characterize the total number of time slots required to carry the service to be accessed, and according to Ni selected for each carrier
- the time slot is configured to perform a weighting process on the corresponding carrier to generate a first carrier priority queue, and perform bearer access on the to-be-accessed service according to the first carrier priority queue.
- a device for example, the base station 10 for carrying a service includes a screening unit 100, a generating unit 101, and a carrying unit 102, where
- the screening unit 100 is configured to select, according to the to-be-accessed service requested by the terminal side, a Ni time slot in which the interference state meets the first preset condition, and the Ni is used to represent the to-be-accessed service.
- the generating unit 101 is configured to perform weighting processing on the corresponding carriers according to the Ni time slots selected for each carrier, to generate a first carrier priority queue;
- the bearer unit 102 is configured to perform bearer access on the to-be-accessed service according to the first carrier priority queue.
- the detailed process of the base station 10 carrying the service to be accessed requested by the UE 11 is as follows:
- Step 300 According to the to-be-accessed service requested by the terminal, select, for each carrier, N time slots whose interference state meets the first preset condition, which is denoted as Ni, and is used to represent the required to be used for carrying the to-be-accessed service.
- the total number of time slots is denoted as N.
- a slow dynamic channel allocation (SDCA) algorithm is used to filter time slot resources whose interference status meets the first preset condition from a plurality of time slot resources, usually in the first round of screening.
- SDCA slow dynamic channel allocation
- the number of available time slots is relatively large, and the power factor value of each time slot represents the interference shape of each time slot. The smaller the power factor value is, the smaller the interference degree is, the higher the priority is.
- the preferred implementation of the present invention may preset a threshold value, and the interference state of the time slot whose power factor value is not greater than the preset threshold value satisfies the first preset condition. If such time slot is more than the required number of time slots, Then, the time slot with higher priority is preferentially selected.
- the common measurement method of the base station NB is used to filter out the N1 time slots with the highest priority.
- the number of code slots per unit time slot required for the service to be accessed requested by the terminal side may be determined first.
- the product of the number of required unit time slot code channels is the total number of code channels required for the service to be accessed, that is, the resources required to be accessed by the service.
- the number of the number of code channels that are not allocated in the unit time slot is less than the number of the code channels to be accessed.
- Step 310 Perform weighting processing on the corresponding carriers according to the selected Ni time slots for each carrier to obtain a carrier priority queue.
- the carrier priority queue 1 is referred to.
- the base station 10 when performing step 310, only performs the corresponding time intervals of the available carriers in the system by using the SDCA algorithm according to the Ni time slots (including the uplink and downlink time slots) of each carrier selected in the step 300.
- the weighting process obtains the priority of each carrier, and then arranges each carrier in descending order of priority, and records the slot number corresponding to the weighting, thereby generating a corresponding carrier priority queue 1.
- the priority queue 1 can be optimally adjusted.
- the congestion carrier is excluded, and, for example, according to the service R4/HSPA (High Speed Uplink Packet Access) type, the shared channel throughput, the FODCA (full name in Chinese and English) algorithm, etc., the carrier priority order is modified. ;
- the weighted time slot corresponding to each carrier recorded does not change.
- Step 320 Perform bearer access to the to-be-accessed service requested by the terminal side according to the carrier priority queue 1.
- the N2 time slots are reselected, and the corresponding carriers are weighted to generate a carrier priority queue, which is called a carrier priority queue 2, and then the carrier priority request queue 2 is used to carry forward the service to be accessed by the terminal side.
- the second preset condition is greater than the first preset condition, or the maximum interference level of the time slot required by the second preset condition is higher than the maximum interference level of the time slot required by the first preset condition.
- the preset threshold corresponding to the first preset condition is relatively large, and the available time slots are relatively large, if there are enough time slots available in the second round of selection, it is not necessary to increase the preset threshold. Value, but if the second round chooses If the time slot with the power factor value not greater than the preset threshold is insufficient, the preset threshold value needs to be increased, and some time slots with the larger interference excluded by the first round are taken into consideration.
- any carrier is used as an example, if the bearer access of the to-be-accessed service requested by the terminal side fails according to the carrier priority queue 2, and all the interference states of the carrier in a certain direction (for example, uplink) meet the requirements.
- the time slots of the two preset conditions have been eliminated, and the time slots in which the interference state meets the second preset condition cannot be found again, and the number of time slots carrying the service to be accessed in the direction is expanded, and the demand on each time slot is reduced.
- the number of code channels (to ensure that the total code channel occupancy is unchanged), and the time slot policy of the other direction (eg, downlink) and the time slot policy of other carriers do not change temporarily, and steps 300-320 are performed again, of course, if In the uplink time slot and the downlink time slot corresponding to any one of the foregoing carriers, when the time slot in which the interference state meets the second preset condition has been eliminated, the uplink time slot and the downlink time slot may be simultaneously extended for the bearer to be accessed.
- the number of timeslots of the service is specifically: determining whether the time slots in the uplink time slot or/and the downlink time slot in any one of the carriers that meet the preset second condition are excluded, and then any one of the time slots is excluded.
- the number of time slots for carrying the to-be-accessed service in the uplink time slot or/and the downlink time slot of the wave is extended, so that the total number of time slots required for the arbitrary carrier to carry the to-be-accessed service is extended to N3, N3 > N2, reducing the number of code slots per unit time slot (uplink time slot or/and downlink time slot) required for the service to be accessed after the extension, and ensuring that the total code channel occupancy is unchanged; selecting the interference state for any one of the carriers N3 time slots complying with the third preset condition, and then, for each of the other carriers, respectively selecting N2 time slots whose interference state meets the preset second condition, and then according to N3 time slots selected for a certain carrier, and
- the N2 time slots selected by each of the other carriers perform weighting processing on the corresponding carriers to generate a carrier priority queue, which is called a carrier priority queue 3, and performs bearer access according to the carrier priority queue 3 to the access service.
- N2 3 time slots (one uplink time slot and two downlink time slots), and after the uplink time slot of the carrier A is extended, the bearer needs to be accessed.
- N3 4 time slots (two uplink time slots, two downlink time slots), wherein the number of unallocated code channels to be included in each time slot of the extended two uplink time slots is reduced, and the total code The number of tracks is unchanged.
- N3 time slots are selected in carrier A for weighting, and N 2 time slot weights are still selected in each of the other carriers, thereby obtaining a corresponding carrier priority queue.
- the third preset condition is the same as the second preset condition, or the maximum interference level of the time slot required by the third preset condition is higher than the maximum interference level of the time slot required by the second preset condition.
- the most extreme case is to take all time slots into account.
- the speed reduction is triggered.
- the access procedure that is, reducing the resource occupation requirement of the service to be accessed (for example, by 2 slots, 8 code channels per slot, down to 2 slots, 4 code channels per slot), and restarting execution Step 300 - Step 320, until the access is successful, and details are not described herein again.
- the access failure is determined, and the resource allocation process is ended.
- each carrier has 6 slots, which are respectively called TS1, TS2, TS3, TS4, TS5 and TS6;
- the default configuration of the R4 service to be accessed is: uplink 1TS*1 SF2, downlink 2TS*8SF16, that is, one uplink time slot, one SF2 code channel per time slot; two downlink time slots, eight SF16 code channels per time slot,
- the so-called SFn code channel refers to a code channel where the spread spectrum system is n, and each small cell in each time slot in FIG. 4 represents 2 SF16 code channels.
- carrier 1 and carrier 2 the ratio of uplink and downlink time slots is 3:3, and the carrier condition is as follows: Carrier 1: There are two SF4 occupations on TS1 and TS2, and the SF2 code channels that are not allocated on TS1 and TS2 are both For one, TS3 has no code channel resources, and there are 8 SF16 code channels occupied on TS4 and TS6. There are 2 discontinuous resource blocks on TS5, occupying 4 SF16 occupations respectively, and SF16 is not allocated on TS4 ⁇ TS6. The number of code channels is 8.
- TS1-TS3 interference decreases sequentially, TS4-TS6 interference increases sequentially;
- the allocated SF2 code channels are all one; if there are 8 SF16 code channels occupied on TS4 TS6, then there are 8 unassigned SF16 code channels on TS3-TS6, TS1-TS3 interference increases sequentially, TS4-TS6 interference Lower in turn;
- the process of carrying the R4 service to be accessed is as follows: The first round: Select TS2+TS4/TS5 weighting in carrier 1 by setting a preset threshold that limits the degree of interference (TS3 is excluded due to insufficient number of code channels), and select TS1+TS5/TS6 weighting in carrier 2; Assuming that the weighted carrier 1 has a higher priority, the generated carrier priority queue 1 is:
- the above division number / is used to reflect the sequence relationship of the time slots.
- the carrier 1 and the carrier 2 are required to perform the bearer access to the R4 service.
- the TS1 of the carrier 1 and the TS1 of the carrier 2 cannot access the SF2, the current resource allocation fails, and the second is started. Wheel
- the second round TS2/TS3 excluded in carrier 1 (because the previous round of TS2 resource allocation failed, TS3 code channel has been occupied), exclude TS1 in carrier 2 (because the previous round of TS1 resource allocation failed),
- TS2/TS3 excluded in carrier 1 (because the previous round of TS2 resource allocation failed, TS3 code channel has been occupied)
- exclude TS1 in carrier 2 because the previous round of TS1 resource allocation failed)
- the generated carrier priority queue 2 is:
- Carrier 1 TS1+TS4/TS5
- the carrier 1 and the carrier 2 are used to perform the bearer access to the R4 service.
- the uplink time slots of the two carriers are still unable to access the SF2, the current round of resource allocation fails, and the third round starts;
- the third round Since all the uplink time slots of the carrier 1 fail to be allocated, the resource requirement of the UE for the carrier 1 is changed to 2TS*1 SF4, and the carrier 2 is unchanged, and the preset threshold value for further limiting the interference level is re-established. After the selection, the TS1/TS2+TS4/TS5 weighting is selected in the carrier 1, and the TS3+TS5/TS6 weighting is selected in the carrier 2. If the weighted carrier 2 has a higher priority, the generated carrier priority queue 3 is:
- Carrier 1 TS1/TS2+TS4/TS5 According to the carrier priority queue 1, the carrier 1 and the carrier 2 are included to try to access the R4 service for bearer access.
- the access time slot is TS3+TS5/TS6.
- Carrier priority list Carrier 2
- Carrier 1 Carrier 1
- Carrier 1 priority list Upstream (TS1, TS2, TS3), Downstream (TS6, TS4, TS5)
- Carrier 2's slot priority list Upstream (TS3, TS2, TS1), Downstream (TS5, TS6, TS4)
- the priority list of the carrier and the time slot is unified, for example,
- Resource priority list Carrier 2 (upstream TS3, downlink TS5 and TS6), carrier 1 (upstream TS1 and TS2, downlink TS4 and TS5), so that the priority queue of the candidate carrier and time slot is determined simultaneously after weighting , improve the efficiency of the operation.
- the base station selects the candidate time slot resource according to the number of time slots required by the terminal side to be accessed, and selects the interference condition according to the preset condition. After the weighting, the priority queues of the candidate carriers and the time slots are determined at the same time, and the access queues are accessed according to the priority queues, so that the services to be accessed requested by the terminal side are combined.
- the actual resource requirements optimize the resource allocation on the system side, and the theoretically optimal resources can be provided to the terminal side, thereby improving the service quality.
- embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
- a computer-usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
本申请公开了一种承载业务的方法、装置及系统,用于提升系统内资源分配的合理性,提高系统业务质量。该方法为:根据终端侧请求的待接入业务,针对每一个载波分别选择干扰状态符合第一预设条件的N1个时隙,其中,N1用于表征承载所述待接入业务所需的时隙数目;根据针对每一个载波选择的N1个时隙,分别对相应的载波进行加权处理,生成第一载波优先级队列;按照所述第一载波优先级队列对所述待接入业务进行承载接入。这样,便结合了终端侧请求的待接入业务的实际资源需求,优化了系统侧的资源分配,可以将理论上最佳的资源提供了终端侧,从而提升了业务质量。本申请同时公开了一种用于承载业务的装置和一种用于承载业务的系统。
Description
一种承载业务的方法、 装置及系统 本申请要求在 2010年 5月 24日提交中国专利局、 申请号为 201010189446.5、 发明名称为
"一种承载业务的方法、 装置及系统"的中国专利申请的优先权, 其全部内容通过引用结合在本 申请中。
技术领域
本发明涉及通信领域, 特别涉及一种承载业务的方法、 装置及系统。 背景技术
在时分同步码分多址 ( Time Division - Synchronous Code Division Multiple Access,TD-SCDMA )系统中, 网络侧在针对用户设备 ( UE )进行资源分配(包 括新接入 /切换 /其他算法触发的资源改变)之前, 需要对备选资源 (包括载波 资源和时隙资源)按照一定准则进行优先级排序, 并从优先级最高的备选资 源开始逐个尝试资源分配。
现有技术下, 在进行资源分配时, 通常针对载波优先级队列和时隙优先 级队列进行遍历并尝试接入。 载波优先级队列和时隙优先级队列的计算方式 有如下三种:
1、 根据预设的配置参量设置固定的载波优先级顺序和时隙优先级顺序。 2、 按照功率资源排序, 包括:
针对上行: 基于网络侧接收宽带总功率( Received Total Wideband Power , RTWP )或者时隙干扰信号功率( Interference Signal Code Power, ISCP )排序; 针对下行: 基于网络侧发射载波功率 (Transmitted Carrier Power, TCP ) 或者多小区干扰协调算法排序;
通过上下行加权先计算得出载波的优先级队列, 之后再得出每一个载波 的时隙优先级队列。 例如:
£设载波 1各时隙的功率因子为 P11,P12,P13,P14,P15,P16 ,载波 2各时隙 的功率因子为 P21,P22,P23,P24,P25,P26 , 且时隙 1和 2为上行, 3-6为下行,
功率因子越小优先级越高, 同时假设载波上行加权因子配置为 Beta, 则现有 SDCA ( Slow Dynamic Channel Allocation, 慢速动态信道分配)算法釆用如下 方法对载波进行加权处理:
载波 1的优先级权重:
PI = ((Pll+P12)/2)*Beta + ((P13+P14+P15+P16)/4)*(1-Beta);
载波 2的优先级权重:
P2 = ((P21+P22)/2)*Beta + ((P23+P24+P25+P26)/4)*(1-Beta);
载波 1和载波 2的优先级按照 P1和 P2的值从低到高排列;
每一个载波中的时隙优先级, 则按照各时隙的功率因子值, 从低到高排 列, 不需要进行加权。
3、 按照码资源占用排序。 其中, 占用码资源越少的载波优先级越高, 同 时, 占用码资源越少的时隙优先级也越高。
从上述方式可以看出, 网络侧在对 UE进行资源分配时, 需要考虑上行和 下行的实际负载情况来进行决策, 但不论釆用哪种策略, 都需要基于以下两 个基本的原则:
首先, 载波的优先级和时隙的优先级计算是分开的, 即分配系统资源时 先确定载波资源再确定时隙资源;
其次, 计算载波优先级时, 针对载波中所有的时隙进行加权。
这样, 便会在某些情况下导致系统资源分配的不合理。 例如, 某个载波 中大部分时隙质量都很好, 仅有一个时隙干扰较大, 针对载波中所有的时隙 都加权会导致加权后的载波优先级较低;但 UE业务的实际资源需求可能艮小, 完全可以承载在少数几个干扰很小的时隙上, 那么, 釆用现有的资源分配方 式将导致无法将 UE分配到最佳的载波 /时隙上, 从而影响 UE的业务使用, 降 低系统的服务质量。 发明内容
本发明实施例提供一种承载业务的方法、 装置及系统, 用以提升资源分
配的合理性, 提高系统业务质量。
本发明实施例提供的具体技术方案如下:
一种承载业务的方法, 包括:
根据终端侧请求的待接入业务, 针对每一个载波, 分别选择干扰状态符 合第一预设条件的 Ni个时隙, 其中, Ni用于表征承载所述待接入业务所需的 总时隙数目;
根据针对每一个载波选择的 Ni个时隙 ,分别对相应的载波进行加权处理, 生成第一载波优先级队列;
按照所述第一载波优先级队列对所述待接入业务进行承载接入。
一种用于承载业务的装置, 包括:
筛选单元, 用于根据终端侧请求的待接入业务, 针对每一个载波, 分别 选择干扰状态符合第一预设条件的 Ni个时隙,其中, Ni用于表征承载所述待 接入业务所需的总时隙数目;
生成单元, 用于根据针对每一个载波选择的 Ni个时隙, 分别对相应的载 波进行加权处理, 生成第一载波优先级队列;
承载单元, 用于按照所述第一载波优先级队列对所述待接入业务进行承 载接入。
一种承载业务的系统, 包括若干基站, 所述基站用于根据终端侧请求的 待接入业务, 针对每一个载波, 分别选择干扰状态符合第一预设条件的 Ni个 时隙, 其中, Ni用于表征承载所述待接入业务所需的总时隙数目, 以及根据 针对每一个载波选择的 Ni个时隙, 分别对相应的载波进行加权处理, 生成第 一载波优先级队列, 并按照所述第一载波优先级队列对所述待接入业务进行 承载接入。
本发明实施例中, 基站根据终端侧请求的待接入业务所需的时隙数目, 在载波加权时, 对备选时隙资源进行筛选,挑选出干扰条件符合预设条件的 N 个载波, 并在加权后同时确定备选载波和时隙的优先级队列, 再根据该优先 级队列对待接入业务进行承载接入, 这样, 便结合了终端侧请求的待接入业
务的实际资源需求, 优化了系统侧的资源分配, 可以将理论上最佳的资源提 供了终端侧, 从而提升了业务质量。 附图说明
图 1为本发明实施例中 TD - SCDMA系统体系架构示意图;
图 2为本发明实施例中基站功能结构示意图;
图 3为本发明实施例中基站承载待接入业务流程图;
图 4为本发明实施例中系统资源示意图。 具体实施方式
现有的 SDCA算法中, 系统资源排序分为两步, 即先进行载波排序再进 行时隙排序。 其中, 进行载波排序的过程中, 针对该载波包含的所有时隙进 行加权, 从而得到载波优先级序列。 这样存在的一个问题就是, 可能由于载 波某个时隙较差, 影响了整个载波的优先级, 但该载波其他时隙干扰较小, 且足够接纳新业务。
下面结合附图对本发明优选的实施方式进行详细说明。
参阅图 1所示, 本发明实施例中,用于承载业务的系统(如, TD-SCDMA 系统)包括若干基站 10和 UE 11 ,基站 10用于根据 UE 11请求的待接入业务, 针对每一个载波, 分别选择干扰状态符合第一预设条件的 Ni个时隙, 其中, Ni用于表征承载所述待接入业务所需的总时隙数目, 以及根据针对每一个载 波选择的 Ni个时隙, 分别对相应的载波进行加权处理, 生成第一载波优先级 队列, 并按照所述第一载波优先级队列对所述待接入业务进行承载接入。
参阅图 2所示, 本发明实施例中, 用于承载业务的装置 (如, 基站 10 ) 包括筛选单元 100、 生成单元 101和承载单元 102, 其中,
筛选单元 100, 用于根据终端侧请求的待接入业务, 针对每一个载波, 分 别选择干扰状态符合第一预设条件的 Ni个时隙, 其中, Ni用于表征承载所述 待接入业务所需的总时隙数目;
生成单元 101 , 用于根据针对每一个载波选择的 Ni个时隙, 分别对相应 的载波进行加权处理, 生成第一载波优先级队列;
承载单元 102,用于按照所述第一载波优先级队列对所述待接入业务进行 承载接入。
基于上述系统架构,参阅图 3所示,本发明实施例中,基站 10承载 UE 11 请求的待接入业务的详细流程如下:
步骤 300: 根据终端侧请求的待接入业务, 针对每一个载波, 分别选择干 扰状态符合第一预设条件的 N个时隙, 记为 Ni , 用于表征承载所述待接入业 务所需的总时隙数目。
本实施例中, 针对任意一载波, 釆用慢速动态信道分配(SDCA )算法策 略, 从若干时隙资源中筛选出干扰状态符合第一预设条件的时隙资源, 通常 在第一轮筛选时隙, 可用的时隙数目比较多, 而各时隙的功率因子值代表了 各时隙干扰状, 功率因子值越小说明干扰程度越小, 则优先级越高。 本发明 优选实施可以预设门限值, 则认为功率因子值不大于预设门限值的时隙的干 扰状态满足第一预设条件, 如果这样的时隙多于所需的时隙数目, 则优先选 择优先级较高的时隙,例如,釆用基站 NB公共测量方式筛选出优先级最高的 N1个时隙。
另一方面, 本实施例中, 针对任意一载波, 在执行步骤 300前, 为了减 少后续的操作复杂度, 可以先确定终端侧请求的待接入业务所需的单位时隙 码道数目, Ni与所需的单位时隙码道数目的乘积为待接入业务所需的总码道 数目, 即待接入业务所需占用的资源。 并在该任意一载波对应的时隙资源中, 排除单位时隙码道数目不满足待接入业务需求的时隙, 即, 排除单位时隙内 未被分配的码道数目小于待接入业务所需的单位时隙码道数目的时隙, 这里 的分配包括已经分配给其它业务使用或已经为其它业务预留了该时隙, 通过 该步骤, 可以实现排除拥塞时隙或 /和为其他业务预留的时隙, 其中, 所谓预 留时隙, 可以是 "切换预留时隙", 若当前 UE 11是在进行切换, 则优先考虑 选择"切换预留时隙", 若当前 UE 11未在进行切换, 则排除 "切换预留时隙"。
步骤 310: 根据针对每一个载波选择的 Ni个时隙, 分别对相应的载波进 行加权处理, 得到载波优先级队列, 本实施例中, 称为载波优先级队列 1。
本实施例中, 在执行步骤 310时, 基站 10仅根据地步骤 300中筛选出的 每一个载波的 Ni个时隙 (包括上下行时隙), 釆用 SDCA算法分别对系统中 可用的相应载波进行加权处理, 得到每一个载波的优先级, 再将每一个载波 按照优先级从高到低的顺序排列, 并记录对应参与加权的时隙号, 从而生成 相应的载波优先级队列 1。
另一方面, 在获得载波优先级队列 1后, 可以对优先级队列 1进行优化 调整。 例如, 排除拥塞载波、 又例如, 根据业务 R4/HSPA ( High Speed Uplink Packet Access, 高速上行行链路分组接入)类型, 共享信道吞吐量、 FODCA (中英文全称) 算法等修改载波优先级顺序; 但记录的每一个载波对应的加 权时隙不变。
步骤 320:按照载波优先级队列 1对终端侧请求的待接入业务进行承载接 入。
在执行步骤 320时, 需按照载波优先级队列 1 包含的每一个载波逐个进 行资源分配尝试, 每一个载波的时隙只考虑记录的对应加权的时隙, 以承载 终端侧请求的待接入业务; 若分配成功则结束当前流程, 若载波优先级队列 1 中所有备选资源均接入失败(由于资源碎片导致可用码道满足需求但实际无 法分配), 则针对每一个载波分别排除导致分配失败的时隙后, 重新执行步骤 300 -步骤 320, 即针对每一个载波的剩余时隙中分别重新选择干扰状态符合 第二预设条件的 N2个时隙, Νι =Ν2, 并参照针对每一个载波重新选择的 N2 个时隙, 分别对相应的载波进行加权处理, 生成载波优先级队列, 称为载波 优先级队列 2,再按照载波优先级队列 2对终端侧请求的待接入业务进行承载 接入。 优选地, 第二预设条件同第一预设条件, 或第二预设条件要求的时隙 的最大干扰程度比第一预设条件要求的时隙的最大干扰程度要高。 如前所述, 如果对应第一预设条件的预设门限值比较大, 且可用时隙比较多, 则在第二 轮选择时有足够的时隙可用, 则不需要提高预设门限值, 但如果第二轮选择
时功率因子值不大于预设门限值的时隙已不够, 则需要提高预设门限值, 将 第一轮排除的干扰较大的一些时隙考虑进来。
基于上述实施例, 以任意一载波为例, 若按照载波优先级队列 2对终端 侧请求的待接入业务进行承载接入失败, 且该载波某方向 (如, 上行) 的所 有干扰状态符合第二预设条件的时隙均已被排除, 无法再找到干扰状态符合 第二预设条件的时隙, 则扩大该方向上承载待接入业务的时隙数目, 减小每 时隙上需求的码道数(保证总码道占用量不变), 而另一方向 (如, 下行) 的 时隙策略以及其他载波的时隙策略暂时不改变, 并重新执行步骤 300-步骤 320, 当然, 若上述任意一载波对应的上行时隙和下行时隙中, 干扰状态符合 第二预设条件的时隙均已被排除时, 也可以同时扩展上行时隙和下行时隙中 用于承载待接入业务的时隙数目, 具体为: 确定任意一载波中上行时隙或 /和 下行时隙中, 干扰状态符合预设第二条件的时隙均已被排除, 则将该任意一 载波的上行时隙或 /和下行时隙中用于承载待接入业务的时隙数目进行扩展, 令该任意一载波承载所述待接入业务所需的总时隙数目扩展至 N3 , N3> N2, 减少扩展后待接入业务所需的单位时隙(上行时隙或 /和下行时隙)码道数目, 并确保总码道占用量不变; 针对所述任意一载波选择干扰状态符合第三预设 条件的 N3个时隙, 接着, 针对其他每一个载波分别选择干扰状态符合预设第 二条件的 N2个时隙, 再根据针对某一载波选择的 N3个时隙, 以及针对其他 每一个载波选择的 N2个时隙, 分别对相应的载波进行加权处理, 生成载波优 先级队列, 称为载波优先级队列 3 , 并按照载波优先级队列 3对待接入业务进 行承载接入。 例如, 在载波 A扩展前, 承载待接入业务需要 N2=3个时隙(一 个上行时隙, 两个下行时隙), 而对载波 A的上行时隙扩展后, 承载待接入业 务需要 N3=4个时隙 (两个上行时隙, 两个下行时隙), 其中, 扩展后的两个 上行时隙中每个时隙需包含的未被分配的码道数目下调, 而总码道数目不变 在载波 A中选择 N3个时隙进行加权, 在其他每一个载波中仍分别选择 N2个 时隙加权, 从而得到相应的载波优先级队列。
优选地, 第三预设条件同第二预设条件, 或第三预设条件要求的时隙的 最大干扰程度比第二预设条件要求的时隙的最大干扰程度要高。 最极端的情 况是, 将所有的时隙考虑进来。
进一步地, 若上述任意一载波内上行时隙和下行时隙中可用于承载待接 入业务的时隙数目已扩至最大, 仍无法找到满足待接入业务所需求的资源, 则触发降速接入流程, 即降低待接入业务的资源占用需求(如, 由 2 时隙, 每时隙 8个码道,降为 2个时隙,每时隙 4个码道),并重新开始执行步骤 300 -步骤 320, 直至成功接入, 在此不再赘述。 实际应用中, 若待接入业务的资 源占用需求已降至最低仍无法找到适用资源, 则确定接入失败, 结束资源分 配流程。
下面以一个具体示例对上述流程进行详细介绍。
参阅图 4所示 叚设系统内当前具有两个载波,分别称为载波 1和载波 2; 每个载波分别具有 6个时隙, 分别称为 TS1、 TS2、 TS3、 TS4、 TS5和 TS6; 假设待接入 R4业务的默认配置为: 上行 1TS*1 SF2, 下行 2TS*8SF16, 即上 行一个时隙, 每时隙一个 SF2码道; 下行两个时隙, 每时隙 8个 SF16码道, 其中, 所谓 SFn码道是指, 扩频系统为 n的码道, 图 4中每个时隙内每个小 格代表 2个 SF16码道。
其中, 载波 1和载波 2内, 上下行时隙比例 3:3 , 并且载波情况如下: 载波 1 : TS1和 TS2上均有 2个 SF4占用, 则 TS1和 TS2上未被分配的 SF2码道均为 1个, TS3已没有码道资源, TS4和 TS6上有 8个 SF16码道占 用, TS5上有 2个不连续资源块, 分别占用 4个 SF16占用, 则 TS4~TS6上未 被分配的 SF16码道为 8个; TS1-TS3干扰依次降低, TS4-TS6干扰依次升高; 载波 2: TS1/TS2上均有 2个 SF4 已占用, TS3上有一个 SF2 占用, 则 TS1-TS3上未被分配的 SF2码道均为 1个; TS4 TS6上均有 8个 SF16码道 占用, 则 TS3-TS6上未被分配的 SF16码道为 8个, TS1-TS3干扰依次升高, TS4-TS6干扰依次降低;
基于上述资源配置状态, 则承载待接入 R4业务的流程如下:
第一轮: 通过设置限制干扰程度的预设门限值, 在载波 1 内选择 TS2+TS4/TS5 加权 (TS3 由于码道数目不足被排除), 在载波 2 内选择 TS1+TS5/TS6加权; 假设加权后载波 1优先级更高, 则生成的载波优先级队 列 1为:
载波 1 TS2+TS4/TS5
载波 2 TS1+TS5/TS6
上述分割号 /用于体现时隙的先后关系。
按照载波优先级队列 1内包含载波 1和载波 2尝试对待接入 R4业务进行 承载接入, 但由于载波 1的 TS2和载波 2 的 TS1均无法接入 SF2, 本轮资源 分配失败, 开始第二轮;
第二轮:在载波 1内排除的 TS2/TS3 (因为上一轮 TS2资源分配失败, TS3 码道均已被占用), 在载波 2内排除 TS1 (因为上一轮 TS1资源分配失败), 重新挑选后, 通过提高限制干扰程度的预设门限值, 在载波 1 内选择 TS1+TS4/TS5力口权, 在载波 2内选择 TS2+TS5/TS6加权; 假设加权后载波 2 优先级更高, 则生成的载波优先级队列 2为:
载波 2 TS2+TS5/TS6
载波 1 TS1+TS4/TS5
按照载波优先级队列 1内包含载波 1和载波 2尝试对待接入 R4业务进行 承载接入,但由于两个载波的上行时隙仍然无法接入 SF2 ,本轮资源分配失败, 开始第三轮;
第三轮: 由于载波 1的所有上行时隙均分配失败, 则针对载波 1改变 UE 的资源需求为 2TS*1 SF4 , 载波 2不变, 则通过进一步提高限制干扰程度的预 设门限值重新选择后, 在载波 1内选择 TS1/TS2+TS4/TS5加权, 在载波 2内 选择 TS3+TS5/TS6加权; 假设加权后载波 2优先级更高, 则生成的载波优先 级队列 3为:
载波 2 TS3+TS5/TS6
载波 1 TS1/TS2+TS4/TS5
按照载波优先级队列 1内包含载波 1和载波 2尝试对待接入 R4业务进行 承载接入, 在载波 2接入成功, 则接入时隙为 TS3+TS5/TS6。
现有技术的载波优先级列表和时隙优先级列表是分开的, 如下: 载波优先级列表: 载波 2 , 载波 1
载波 1的时隙优先级列表: 上行(TS1,TS2 , TS3 ), 下行 (TS6,TS4,TS5) 载波 2的时隙优先级列表: 上行(TS3 , TS2,TS1 ), 下行 (TS5,TS6,TS4) 而本发明实施例中, 载波和时隙的优先级列表是合一的, 如,
资源优先级列表: 载波 2 (上行 TS3,下行 TS5和 TS6 ), 载波 1 (上行 TS1 和 TS2,下行 TS4和 TS5 ), 这样, 便在加权后同时确定了备选载波和时隙的优 先级队列, 提高了运算效率。
综上所述, 本发明实施例中, 基站根据终端侧请求的待接入业务所需的 时隙数目, 在载波加权时, 对备选时隙资源进行 选, 挑选出干扰条件符合 预设条件的 N个载波, 并在加权后同时确定备选载波和时隙的优先级队列, 再根据该优先级队列对待接入业务进行承载接入, 这样, 便结合了终端侧请 求的待接入业务的实际资源需求, 优化了系统侧的资源分配, 可以将理论上 最佳的资源提供了终端侧, 从而提升了业务质量。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或 计算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产 品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图 和 /或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中的流程 和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器, 使得通 过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流
程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个流程或 多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的 处理, 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图 一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步 骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了 基本创造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。
Claims
1、 一种承载业务的方法, 其特征在于, 包括:
根据终端侧请求的待接入业务, 针对每一个载波, 选择干扰状态符合第 一预设条件的 Ni个时隙,其中, Ni用于表征承载所述待接入业务所需的总时 隙数目;
根据针对每一个载波选择的 Ni个时隙 ,分别对相应的载波进行加权处理, 生成第一载波优先级队列;
按照所述第一载波优先级队列对所述待接入业务进行承载接入。
2、 如权利要求 1所述的方法, 其特征在于, 根据终端侧请求的待接入业 务,针对每一个载波,分别选择干扰状态符合第一预设条件的 Ni个时隙之前, 包括:
确定所述待接入业务需要的单位时隙码道数目 n,并从针对每一个载波的 时隙资源中, 分别筛选出该单位时隙内未被分配的码道数目不小于 n的时隙。
3、 如权利要求 1所述的方法, 其特征在于, 生成所述第一载波优先级队 列后, 在按照该第一载波优先级队列对所述待接入业务进行承载接入之前, 对所述第一载波优先级队列进行优化调整。
4、 如权利要求 1、 2或 3任一项所述的方法, 其特征在于, 按照所述第 一载波优先级队列对所述待接入业务进行承载接入失败时, 包括:
针对每一个载波分别确定并排除导致承载接入失败的时隙;
在针对每一个载波的剩余时隙中分别选择干扰状态符合第二预设条件的 N2个时隙, Νι =Ν2;
根据针对每一个载波选择的 N2个时隙 ,分别对相应的载波进行加权处理 , 生成第二载波优先级队列;
按照所述第二载波优先级队列对所述待接入业务进行承载接入。
5、 如权利要求 4所述的方法, 其特征在于, 按照所述第二载波优先级队 列对所述待接入业务进行承载接入失败, 且某一载波的上行时隙或 /和下行时 隙中所有干扰状态符合第二预设条件的时隙均已被排除时, 包括: 将所述某一载波的上行时隙或 /和下行时隙中用于承载待接入业务的时隙 数目进行扩展, 令所述某一载波承载所述待接入业务所需的总时隙数目扩展 至 N3 , N3 > N2;
针对所述某一载波选择干扰状态符合第三预设条件的 N3个时隙; 针对其他每一个载波分别选择干扰状态符合第二预设条件的 N2个时隙, 根据针对某一载波选择的 N3个时隙, 以及针对其他每一个载波选择的 N2个时隙, 分别对相应的载波进行加权处理, 生成第三载波优先级队列; 按照所述第三载波优先级队列对所述待接入业务进行承载接入。
6、 如权利要求 5所述的方法, 其特征在于, 若任意一载波内上行时隙或 /和下行时隙中用于承载待接入业务的时隙数目已扩至最大, 对所述待接入业 务仍无法成功接入时, 则降低所述待接入业务的资源占用需求, 并重新进行 承载接入。
7、 一种用于承载业务的装置, 其特征在于, 包括:
筛选单元, 用于根据终端侧请求的待接入业务, 针对每一个载波, 分别 选择干扰状态符合第一预设条件的 Ni个时隙,其中, Ni用于表征承载所述待 接入业务所需的总时隙数目;
生成单元, 用于根据针对每一个载波选择的 Ni个时隙, 分别对相应的载 波进行加权处理, 生成第一载波优先级队列;
承载单元, 用于按照所述第一载波优先级队列对所述待接入业务进行承 载接入。
8、 如权利要求 7所述的装置, 其特征在于, 所述筛选单元根据终端侧请 求的待接入业务, 针对每一个载波, 分别选择干扰状态符合第一预设条件的 Ni个时隙之前, 确定所述待接入业务需要的单位时隙码道数目 n, 并从针对 每一个载波的时隙资源中, 分别筛选出该单位时隙内未被分配的码道数目不 小于 n时隙。
9、 如权利要求 7所述的装置, 其特征在于, 所述生成单元生成所述第一 载波优先级队列后, 在所述承载单元按照该第一载波优先级队列对所述待接 入业务进行承载接入之前, 对所述第一载波优先级队列进行优化调整。
10、 如权利要求 Ί〜9任一项所述的装置, 其特征在于, 所述承载单元按 照所述第一载波优先级队列对所述待接入业务进行承载接入失败时, 所述筛 选单元针对每一个载波分别确定并排除导致承载接入失败的时隙, 并在针对 每一个载波的剩余时隙中分别选择干扰状态符合第二预设条件的 Ν2个时隙, Ni = N2, 所述生成单元根据针对每一个载波选择的 N2个时隙, 分别对相应的 载波进行加权处理, 生成第二载波优先级队列, 所述承载单元按照所述第二 载波优先级队列对所述待接入业务进行承载接入。
11、 如权利要求 10所述的装置, 其特征在于, 所述承载单元按照所述第 二载波优先级队列对所述待接入业务进行承载接入失败, 且某一载波的上行 时隙或 /和下行时隙中所有干扰状态符合第二预设条件的时隙均已被排除时, 所述筛选单元将所述某一载波的上行时隙或 /和下行时隙中用于承载待接入业 务的时隙数目进行扩展, 令所述某一载波承载所述待接入业务所需的总时隙 数目扩展至 N3 , N3 > N2, 并针对所述某一载波选择干扰状态符合第三预设条 件的 N3个时隙, 以及针对其他每一个载波分别选择干扰状态符合第二预设条 件的 N2个时隙, 所述生成单元根据针对某一载波选择的 N3个时隙, 以及针 对其他每一个载波选择的 N2个时隙 , 分别对相应的载波进行加权处理 , 生成 第三载波优先级队列, 所述承载单元按照所述第三载波优先级队列对所述待 接入业务进行承载接入。
12、 如权利要求 11所述的装置, 其特征在于, 还包括:
降速接入单元, 用于在若任意一载波内上行时隙或 /和下行时隙中用于承 载待接入业务的时隙数目已扩至最大, 对所述待接入业务仍无法成功接入时, 则降低所述待接入业务的资源占用需求, 并重新进行承载接入。
13、 一种承载业务的系统, 其特征在于, 包括若干基站, 所述基站用于 根据终端侧请求的待接入业务, 针对每一个载波, 分别选择干扰状态符合第 一预设条件的 Ni个时隙,其中, Ni用于表征承载所述待接入业务所需的总时 隙数目, 以及根据针对每一个载波选择的 Ni个时隙, 分别对相应的载波进行 加权处理, 生成第一载波优先级队列, 并按照所述第一载波优先级队列对所 述待接入业务进行承载接入。
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