CN101583194A - Resource allocation method based on the cooperation between base stations of virtual subdistrict and system thereof - Google Patents
Resource allocation method based on the cooperation between base stations of virtual subdistrict and system thereof Download PDFInfo
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Abstract
The invention relates to a resource allocation method based on the cooperation between base stations of virtual subdistricts and a system thereof, which is applied in a wireless communication scene where a frequency reuse factor is one and a mobile station is configured with a single antenna; the method comprises the following steps of: a cooperation base station collection is determined according to the geographical position of every base station; every cooperation base station collection is called as the virtual subdistrict; a serving base station of every mobile station is respectively determined; the mobile stations are grouped into a cooperation mobile station and a traditional mobile station; the resource allocation proportion is determined; according to the resource allocation proportion, firstly, the cooperation mobile station is scheduled and distributed with resources; secondly, the traditional mobile station is scheduled and distributed with resources. The method and system of the invention consider the resource allocation of the system in all bands, have low complexity, high utilization rate of the resources, and simultaneously guarantees the Qos request of each user.
Description
Technical field
The present invention relates to the resource allocation in the wireless communication technology, particularly a kind of resource allocation methods and system thereof of the cooperation between base stations based on virtual subdistrict.
Background technology
The research of the transmission technology of multi-user multi-aerial system is current very important and active research field.In conventional cellular systems, introduce the user performance that many antennas can improve the overall performance, particularly center of housing estate of system to a great extent; Yet the performance of Cell Edge User can't obtain bigger lifting.Its reason is the existence of presence of intercell interference, makes that cell edge is interference-limited zone.
For improving the performance of Cell Edge User, the base station collaboration technology becomes the focus of current research.In the standardization effort of LTE+, the base station collaboration system is referred to as " CoMP " technology, in the base station collaboration system, by uniting methods such as transmission, joint transmission or federated user scheduling between the base station, make Cell Edge User eliminate effectively or suppressed presence of intercell interference that performance is greatly improved thereupon.
In the base station collaboration system, because certain cell edge travelling carriage need be by a plurality of base stations common service, this just requires these base stations to be operated on the identical time.Therefore need the time-frequency resource allocating algorithm of research based on base station collaboration.Consider from the best performance angle, fully dynamic frequency planning and Resource Allocation Formula are optimum, both can guarantee to participate in the base station collaboration quality of services for users, can guarantee the efficient utilization of all running time-frequency resources again, yet this method complexity is too high, be not suitable for real system, the scheme of fixed frequency planning has been proposed in the LTE+ of Korea S Samsung standardization motion " R1-090613:Discussion of CoMP SU-MIMO ", promptly a plurality of microzonations that adopt CoMP are told identical size and the identical frequency band of correspondence position, although this method complexity is low, lack flexibility.
Summary of the invention
It is low to the purpose of this invention is to provide a kind of complexity, and resource efficiency utilance height is applicable to the resource allocation methods and the system thereof based on the cooperation between base stations of virtual subdistrict of real system, to overcome the deficiency that prior art exists.
For achieving the above object, the present invention adopts following technical scheme.
A kind of resource allocation methods of the cooperation between base stations based on virtual subdistrict is applied to frequency reuse and is 1, the radio communication scene of travelling carriage configuration single antenna, and the method comprising the steps of:
S1. set the number of the base station that the cooperative base station collection comprises, and determine the cooperative base station collection according to the geographical position of each base station, described cooperative base station collection is called virtual subdistrict;
S2. the serving BS of corresponding travelling carriage be will be defined as with each base station of channel strength maximum between each travelling carriage respectively, and with channel strength between its serving BS travelling carriage cooperate travelling carriage and traditional travelling carriage will be divided into according to each travelling carriage;
S3. determine the resource allocation ratio between cooperation travelling carriage and the traditional travelling carriage;
S4. according to described resource allocation ratio, scheduling cooperation travelling carriage is its Resources allocation also;
S5. according to described resource allocation ratio, dispatch traditional travelling carriage and also be its Resources allocation.
Wherein, among the step S2, will be divided into traditional travelling carriage greater than the travelling carriage of given thresholding, will be divided into the travelling carriage of cooperating less than the travelling carriage of given thresholding with the channel strength of its serving BS with the channel strength of its serving BS.
Wherein, according to the described given thresholding of user's QoS requirements set.
Wherein, among the step S1, constitute described cooperative base station collection by the selected adjacent base station, geographical position of the number that sets.
Wherein, the base station that comprised of described cooperative base station collection is the NodeB of 3GPP LTE.
Wherein, the base station that comprised of described cooperative base station collection is the remote radio unit (RRU) in the distributed base station.
Wherein, the base station that comprised of described cooperative base station collection is the sector of cellular system.
Wherein, described travelling carriage is the terminal equipment of cellular system.
Wherein, described travelling carriage is the subscriber equipment of WCDMA system and evolution system thereof.
Wherein, the base station that comprised of described cooperative base station collection and the service relation of described travelling carriage are that unit dynamically updates with the subframe.
Wherein, described resource allocation ratio is that unit dynamically updates with the frame.
The present invention also provides a kind of resource allocation system of the cooperation between base stations based on virtual subdistrict, it is applied to, and frequency reuse is 1, the radio communication scene of travelling carriage configuration single antenna, this system comprises: the virtual subdistrict construction unit, be used to set the number of the base station that the cooperative base station collection comprises, and determine the cooperative base station collection according to the geographical position of each base station, described cooperative base station collection is called virtual subdistrict; The travelling carriage grouped element, be used for to be defined as the serving BS of corresponding travelling carriage respectively with each base station of channel strength maximum between each travelling carriage, and with channel strength between its serving BS travelling carriage be grouped into cooperate travelling carriage and traditional travelling carriage according to each travelling carriage; Resource allocation ratio determining unit is used for the resource allocation ratio between definite cooperation travelling carriage and the traditional travelling carriage; Cooperation travelling carriage scheduling unit is used for according to described resource allocation ratio, and scheduling cooperation travelling carriage is its Resources allocation also; Tradition travelling carriage scheduling unit is used for according to described resource allocation ratio, dispatches traditional travelling carriage and is its Resources allocation.
Method of the present invention and system thereof are in the resource allocation of full range band taking into account system, and complexity is low, the efficiency of resource height, and the while has well guaranteed each user's QoS demand.
Description of drawings
Fig. 1 is the resource allocation methods flow chart based on the cooperation between base stations of virtual subdistrict according to embodiment of the present invention;
Fig. 2 is the resource allocation system pie graph based on the cooperation between base stations of virtual subdistrict according to embodiment of the present invention;
Fig. 3 is that the base station collaboration radio communication scene of embodiment constitutes schematic diagram;
Fig. 4 is that the virtual subdistrict of embodiment makes up schematic diagram;
Fig. 5 is the schematic diagram of the travelling carriage corresponding with service base station of embodiment.
Embodiment
Resource allocation methods and resource allocation system based on the cooperation between base stations of virtual subdistrict to the present invention proposes are described as follows in conjunction with the accompanying drawings and embodiments.
As shown in Figure 1, the resource allocation methods of the cooperation between base stations based on virtual subdistrict of the present invention, it is 1 that this method is applied to frequency reuse, the base station collaboration radio communication scene of travelling carriage configuration single antenna comprises step:
S1. for each transfer of data subframe, according to user QoS demand and network capacity support, the number of the base station that setting cooperative base station collection (for the set of base station) comprises, and according to the geographical position of each base station, an adjacent setting number base station, selected geographical position constitutes the cooperative base station collection, and the cooperative base station collection is called virtual subdistrict;
S2. determine serving BS according to channel strength, specifically, for each travelling carriage, will and that base station of the channel strength maximum between it be defined as the serving BS of this travelling carriage, and travelling carriage is divided into groups according to the channel strength between each travelling carriage and its serving BS: and the channel strength between its serving BS is greater than the travelling carriage of given thresholding, be divided into traditional travelling carriage, and the channel strength between its serving BS is less than the travelling carriage of given thresholding, be divided into the cooperation travelling carriage, the cooperation travelling carriage needs the interior base stations united service of virtual subdistrict could satisfy its QoS demand, wherein, given thresholding is set flexibly according to user's QoS demand;
S3. for each data transmission frames, according to the size of virtual subdistrict, the grouping of travelling carriage, and user's QoS demand determine the resource allocation ratio between cooperation travelling carriage and traditional travelling carriage, but this ratio are unit self adaptation adjustment with the frame;
S4. according to the time-frequency resource allocating ratio, scheduling cooperation travelling carriage is its Resources allocation also;
S5. according to the time-frequency resource allocating ratio, dispatch traditional travelling carriage and also be its Resources allocation.
Wherein, the base station that comprised of cooperative base station collection is can be the sector of NodeB, the remote radio unit (RRU) in the distributed base station or the cellular system of 3GPP LTE.Travelling carriage can be the terminal equipment of cellular system or the subscriber equipment of WCDMA system and evolution system thereof.
The base station that the cooperative base station collection is comprised and the service relation of travelling carriage are that unit dynamically updates with the subframe.
The resource allocation ratio is that unit dynamically updates with the frame.
As shown in Figure 2, the present invention also provides a kind of resource allocation system of the cooperation between base stations based on virtual subdistrict, this system applies in frequency reuse be 1, the radio communication scene of travelling carriage configuration single antenna, comprise: the virtual subdistrict construction unit, be used for according to user's request and network capacity support, set the number of the base station that the cooperative base station collection comprises, and determine the cooperative base station collection according to the geographical position of each base station, the cooperative base station collection is called virtual subdistrict; The travelling carriage grouped element is used for respectively determining and the base station of each the travelling carriage channel strength maximum serving BS as this travelling carriage, and with channel strength between its serving BS travelling carriage is grouped into cooperate travelling carriage and traditional travelling carriage according to each travelling carriage; Resource allocation ratio determining unit is used for the size according to virtual subdistrict, and the grouping situation of travelling carriage, and users service needs are determined the resource allocation ratio; Cooperation travelling carriage scheduling unit is used for according to the resource allocation ratio, and scheduling cooperation travelling carriage is its Resources allocation also; Tradition travelling carriage scheduling unit is used for according to the resource allocation ratio, dispatches traditional travelling carriage and is its Resources allocation.
Embodiment
As shown in Figure 3, it is 1,4 base station that present embodiment provides a frequency reuse, the base station collaboration radio communication scene of 8 travelling carriages (being subscriber equipment), the resource allocation methods based on the cooperation between base stations of virtual subdistrict of present embodiment is concrete implement as follows.
For each transfer of data subframe, according to user's request and network capacity support, the number of the base station that setting cooperative base station collection comprises is 2, and according to the geographical position of each base station, 2 adjacent base stations of selected geographical position constitute the cooperative base station collection, make up virtual subdistrict, as shown in Figure 4, two round frames are represented two virtual subdistricts respectively, and two base stations are arranged in each virtual subdistrict;
For each travelling carriage, determine respectively and the base station of each travelling carriage channel strength maximum serving BS as this travelling carriage, as shown in Figure 5, travelling carriage 1,2 serving BS is base station 1, travelling carriage 4,6 serving BS is base station 3, travelling carriage 3,5 serving BS is base station 2, travelling carriage 7,8 serving BS is base station 4, according to the channel strength between each travelling carriage and its serving BS travelling carriage is divided into groups: travelling carriage 1,2,3,6,7,8 are in the center of housing estate zone, and the channel strength between its serving BS is greater than given thresholding, be divided into traditional travelling carriage, travelling carriage 4,5 and its serving BS between channel strength less than given thresholding, be divided into the cooperation travelling carriage, the cooperation travelling carriage needs the interior base stations united service of virtual subdistrict could satisfy its QoS demand;
Wherein, given thresholding is set flexibly according to user's QoS demand.
For each data transmission frames, size according to virtual subdistrict, the grouping of travelling carriage, and users service needs, determine the time-frequency resource allocating ratio between cooperation travelling carriage and traditional travelling carriage, if the system time frequency resource piece adds up to 3, the markup resources piece is * 1, * 2, * 3, and the time-frequency resource allocating ratio that can set between cooperation travelling carriage and traditional travelling carriage is 1: 2;
For each transfer of data subframe, according to the time-frequency resource allocating ratio, virtual subdistrict and cooperation travelling carriage 4 for Fig. 5 left side, scheduling travelling carriage 4 also is its distribution time * 1, for the virtual subdistrict and the cooperation travelling carriage 5 on Fig. 5 the right, scheduling travelling carriage 5 also distributes time * 1 for it;
For each transfer of data subframe, according to the time-frequency resource allocating ratio, dispatch traditional travelling carriage and distribute running time-frequency resource for it, travelling carriage 1 is serviced on time * 2 or * 3, travelling carriage 2 is serviced on time * 3 or * 2, and travelling carriage 3 is serviced on time * 2 or * 3, and travelling carriage 6 is serviced on time * 2 or * 3, travelling carriage 7 is serviced on time * 2 or 3*, and travelling carriage 8 is serviced on time * 3 or * 2.
Above execution mode only is used to illustrate the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (12)
1, a kind of resource allocation methods of the cooperation between base stations based on virtual subdistrict is applied to frequency reuse and is 1, the radio communication scene of travelling carriage configuration single antenna, and the method comprising the steps of:
S1. set the number of the base station that the cooperative base station collection comprises, and determine the cooperative base station collection according to the geographical position of each base station, described cooperative base station collection is called virtual subdistrict;
S2. the serving BS of corresponding travelling carriage be will be defined as with each base station of channel strength maximum between each travelling carriage respectively, and with channel strength between its serving BS travelling carriage cooperate travelling carriage and traditional travelling carriage will be divided into according to each travelling carriage;
S3. determine the resource allocation ratio between cooperation travelling carriage and the traditional travelling carriage;
S4. according to described resource allocation ratio, scheduling cooperation travelling carriage is its Resources allocation also;
S5. according to described resource allocation ratio, dispatch traditional travelling carriage and also be its Resources allocation.
2, the resource allocation methods of the cooperation between base stations based on virtual subdistrict as claimed in claim 1, it is characterized in that, among the step S3, to be divided into traditional travelling carriage greater than the travelling carriage of given thresholding with the channel strength of its serving BS, will be divided into the travelling carriage of cooperating less than the travelling carriage of given thresholding with the channel strength of its serving BS.
3, the resource allocation methods of the cooperation between base stations based on virtual subdistrict as claimed in claim 2 is characterized in that, according to the described given thresholding of user's QoS requirements set.
4, the resource allocation methods of the cooperation between base stations based on virtual subdistrict as claimed in claim 1 is characterized in that, among the step S1, constitutes described cooperative base station collection by the selected adjacent base station, geographical position of the number that sets.
5, as the resource allocation methods of each described cooperation between base stations based on virtual subdistrict among the claim 1-4, it is characterized in that the base station that described cooperative base station collection is comprised is the NodeB of 3GPPLTE.
6, as the resource allocation methods of each described cooperation between base stations based on virtual subdistrict among the claim 1-4, it is characterized in that the base station that described cooperative base station collection is comprised is the remote radio unit (RRU) in the distributed base station.
7, as the resource allocation methods of each described cooperation between base stations based on virtual subdistrict among the claim 1-4, it is characterized in that the base station that described cooperative base station collection is comprised is the sector of cellular system.
8, as the resource allocation methods of each described cooperation between base stations based on virtual subdistrict among the claim 1-4, it is characterized in that described travelling carriage is the terminal equipment of cellular system.
9, as the resource allocation methods of each described cooperation between base stations based on virtual subdistrict among the claim 1-4, it is characterized in that described travelling carriage is the subscriber equipment of WCDMA system and evolution system thereof.
10, the resource allocation methods of the cooperation between base stations based on virtual subdistrict as claimed in claim 1 is characterized in that the base station that described cooperative base station collection is comprised and the service relation of described travelling carriage are that unit dynamically updates with the subframe.
11, the resource allocation methods of the cooperation between base stations based on virtual subdistrict as claimed in claim 1 is characterized in that described resource allocation ratio is that unit dynamically updates with the frame.
12, a kind of resource allocation system of the cooperation between base stations based on virtual subdistrict is applied to frequency reuse and is 1, the radio communication scene of travelling carriage configuration single antenna, and this system comprises:
The virtual subdistrict construction unit is used to set the number of the base station that the cooperative base station collection comprises, and determines the cooperative base station collection according to the geographical position of each base station, and described cooperative base station collection is called virtual subdistrict;
The travelling carriage grouped element, be used for to be defined as the serving BS of corresponding travelling carriage respectively with each base station of channel strength maximum between each travelling carriage, and with channel strength between its serving BS travelling carriage be grouped into cooperate travelling carriage and traditional travelling carriage according to each travelling carriage;
Resource allocation ratio determining unit is used for the resource allocation ratio between definite cooperation travelling carriage and the traditional travelling carriage;
Cooperation travelling carriage scheduling unit is used for according to described resource allocation ratio, and scheduling cooperation travelling carriage is its Resources allocation also;
Tradition travelling carriage scheduling unit is used for according to described resource allocation ratio, dispatches traditional travelling carriage and is its Resources allocation.
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