CN102548006B - Scheduling method - Google Patents
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- CN102548006B CN102548006B CN201010620263.4A CN201010620263A CN102548006B CN 102548006 B CN102548006 B CN 102548006B CN 201010620263 A CN201010620263 A CN 201010620263A CN 102548006 B CN102548006 B CN 102548006B
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Abstract
The invention provides a scheduling method. The method comprises the following steps that: a, a radio network controller (RNC) divides an HSDPA (High Speed Downlink Packet Access) resource pool in a system into two parts in advance and notifies a base station that one part is a resource pool used by a center user and the other part is a resource pool used by an edge user; b, for an HSDPA user which currently needs to be scheduled, the base station calculates a time slot resource number N required by the HSDPA user; and c, the base station judges whether the HSDPA user is positioned at the edge of a cell, if yes, the HSDPA user is scheduled by utilizing the resource pool used by the edge user and adopting a time slot random scheduling mode, and if no, the HSDPA user is scheduled by utilizing the resource pool used by the center user and adopting a conventional scheduling mode. Due to the adoption of the scheduling method provided by the invention, the same frequency interference between adjacent cells can be effectively reduced.
Description
Technical field
The present invention relates to the dispatching technique of mobile communication, particularly relate to the dispatching method in TD-SCDMA system.
Background technology
In existing TD-SCDMA system, the edge customer of neighbor cell may configure the scheduling resource of co-frequency co-time slot, like this, when high speed downlink packet accesses (HSDPA) user in cell edge, homogeneous-frequency adjacent-domain HSDPA user's interference will be subject to, thereby cause user's the error rate (BLER) to rise, correspondingly, throughput also can decline.
A kind of technical scheme that solves said method is not yet proposed at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of dispatching method, and the method can effectively reduce the co-channel interference between neighbor cell.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A dispatching method, the method comprises the following steps:
A, radio network controller (RNC) are divided into two parts informing base station NodeB by the HSDPA resource pool in system in advance, the resource pool that centered by a part, user uses, and another part is the resource pool that edge customer is used;
B, the HSDPA user who dispatches for current needs, described base station is calculated the required time interval resource of this HSDPA user and is counted N;
C, described base station judge that whether described HSDPA user is in cell edge, if, the resource pool that utilizes described edge customer to use, adopt the mode of slotted random scheduling to dispatch described HSDPA user, otherwise, the resource pool that utilizes central user to use, adopts traditional scheduling mode to dispatch described HSDPA user.
In sum, the dispatching method that the present invention proposes, by RNC, according to the user type of use resource, HSDPA resource pool is divided into two parts in advance, be the resource pool of central user use and the resource pool that edge customer is used, then, when edge user assignment scheduling resource, adopt random mode from the resource pool of described edge customer use, select the time interval resource that this edge customer is used, so, can reduce adjacent co-frequency cell edge customer and use the probability with time slot, thereby can reduce the interference that co-frequency neighbor cell edge customer produces.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Main thought of the present invention is: when scheduling edge HSDPA user, make the time slot scheduling of the edge HSDPA user in homogeneous-frequency adjacent-domain and Serving cell stagger as far as possible, thereby the co-frequency co-time slot that can reduce between neighbor cell disturbs, reduce HSDPA user's BLER, thereby can improve HSDPA user throughput.
Fig. 1 is the schematic flow sheet of this embodiment mono-.As shown in Figure 1, this embodiment mainly comprises:
Step 101, radio network controller (RNC) are divided into two parts informing base station NodeB by the HSDPA resource pool in system in advance.
Wherein, the resource pool that centered by a part, user uses, another part is the resource pool that edge customer is used.
Further, in order to make full use of the good advantage of signal of central user, the overall performance of raising system, when carrying out resource division, can carry out according to following principle: the carrier number in the resource pool that edge customer is used is less than or equal to the carrier number in the resource pool that central user used, the timeslot number in the resource pool that edge customer is used is less than or equal to the timeslot number in the resource pool that central user used.
Based on mentioned above principle, when the carrier number in the HSDPA resource pool in system is only one, can only divide the time interval resource on this unique carrier wave, while dividing, according to make as far as possible central user can timeslot number be greater than the spendable timeslot number of edge customer, like this, can make full use of the good advantage of signal of central user, the overall performance of raising system, and carrier number in HSDPA resource pool is when more than two, the carrier resource that can make central user and edge customer use is not identical.
Step 102, the HSDPA user who dispatches for current needs, described base station is calculated the required time interval resource of this HSDPA user and is counted N.
This step is when specific implementation, channel quality information CQI and the PQ data volume that can report according to the current HSUPA UE that need to dispatch, calculate the required time interval resource of this HSDPA user and count N, circular is grasped by those skilled in the art, does not repeat them here.
Step 103, described base station judge that whether described HSDPA user is in cell edge, if, the resource pool that utilizes described edge customer to use, adopt the mode of slotted random scheduling to dispatch described HSDPA user, otherwise, the resource pool that utilizes central user to use, adopts traditional scheduling mode to dispatch described HSDPA user.
Here, judge whether described HSDPA user can adopt following either method to realize in cell edge:
Method one, described base station are by judging current described HSDPA user that described RNC the sends notice in cell edge that whether received, if received, determine that described HSDPA user is in cell edge, otherwise determine that described HSDPA user is in center of housing estate.
Wherein, be specially the opportunity that described RNC issues described notice: when described HSDPA user access network, in described RNC statistics Preset Time, the received signal code power of described HSDPA reporting of user is less than the number of times of signal strength threshold, if the number of times of adding up is greater than default number of times, by privately owned interface, to described base station, issue described notice.
Here it should be noted that, in actual applications, when described HSDPA user access network, described RNC will add up the number of times that the received signal code power of described HSDPA reporting of user in Preset Time is less than signal strength threshold, its concrete methods of realizing is grasped by those skilled in the art, does not repeat them here.
Method two, NodeB determine the signal impulse response intensity of the training sequence that described HSDPA user uses by multi-cell joint detection (MCJD) algorithm, if described intensity lower than default signal impulse response intensity threshold, judges described in this that HSDPA user is in cell edge.
Method three, NodeB measure described HSDPA user's uplink interference signal code power (ISCP), if the measurement result of described ISCP is greater than default interference strength threshold value, judge that described HSDPA user is in cell edge.
It should be noted that, whether above-mentioned signal strength threshold, signal impulse response intensity threshold and interference strength threshold value be all for defining user in cell edge, and whether this user is edge customer.In actual applications, when signal strength signal intensity and signal impulse response intensity threshold arrange excessive or interference strength threshold value setting when too small, be more prone to judge that user is edge customer, because edge customer is resource-constrained, cause entire system performance to decline.Otherwise, when signal strength signal intensity and signal impulse response intensity threshold arrange too small or interference strength threshold value setting when excessive, be more prone to judge user-center user, because central user does not adopt random schedule strategy, increase the weight of co-channel interference, reduced systematic function.In actual applications, those skilled in the art can be by emulation according to Interference Signal Code Power, and the performance parameters such as cell downlink throughput, for above-mentioned threshold value configures suitable value.
In actual applications, can also adopt the mode of any two kinds of combinations in said method to judge that whether user is in cell edge, to improve the accuracy of judgement.When adopting the mode of multiple judgement combination, preferably, can take to be judged as main, RNC with base station and be judged as auxiliary mode.
The concrete grammar that the mode of described employing slotted random scheduling is dispatched described HSDPA user can be:
According to q=min{a, N}, determines the current configurable timeslot number q to described HSDPA user, and the resource pool using from described edge customer, q time slot configuration of random selection given described HSDPA user.Wherein, 1≤a≤M-1, a is the configurable maximum timeslot number of edge customer; M is the timeslot number in the resource pool that uses of described edge customer.
In actual applications, when a arranges when larger, can make the throughput of central user decline, when a arranges hour, can make the throughput of edge customer decline, those skilled in the art can according to actual needs, select suitable a value by emulation.When the HSDPA of cell configuration carrier wave hour, the better value of a is 2.
Here, by according to q=min{a, N}, the random time slot of selecting for dispatching, can guarantee that the time slot in resource pool that edge customer uses can all not distributed to this edge customer, like this, the edge customer of adjacent co-frequency cell is likely configured to the time slot that is not assigned to this edge customer, thereby the edge customer that can effectively reduce adjacent co-frequency cell is used the probability of identical time slot, and then can reduce the interference of co-frequency neighbor cell, meets user's QoS demand.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a dispatching method, is characterized in that, the method comprises the following steps:
A, radio network controller (RNC) are divided into two parts informing base station NodeB by the high-speed downlink packet access HSDPA resource pool in system in advance, the resource pool that centered by a part, user uses, and another part is the resource pool that edge customer is used;
B, the HSDPA user who dispatches for current needs, described base station is calculated the required time interval resource of this HSDPA user and is counted N;
C, described base station judge that whether described HSDPA user is in cell edge, if, the resource pool that utilizes described edge customer to use, adopt the mode of slotted random scheduling to dispatch described HSDPA user, otherwise, the resource pool that utilizes central user to use, adopts traditional scheduling mode to dispatch described HSDPA user;
Wherein, the mode of described employing slotted random scheduling is scheduling to described HSDPA user:
According to q=min{a, N}, determines the current configurable timeslot number q that gives described HSDPA user, and wherein, a is the configurable maximum timeslot number of edge customer, 1≤a≤M-1, and described M is the timeslot number in the resource pool that uses of described edge customer;
The resource pool using from described edge customer, q time slot configuration of random selection given described HSDPA user.
2. method according to claim 1, it is characterized in that, the principle of described division foundation is: the carrier number in the resource pool that edge customer is used is less than or equal to the carrier number in the resource pool that central user used, and the timeslot number in the resource pool that edge customer is used is less than or equal to the timeslot number in the resource pool that central user used.
3. method according to claim 1, is characterized in that, judges that whether described HSDPA user in cell edge is in described step c:
Described base station judges whether to receive described HSDPA user that described RNC the sends notice in cell edge, if, determine that described HSDPA user is in cell edge, wherein, be the opportunity that described RNC issues described notice: when described HSDPA user access network, in described RNC statistics Preset Time, the received signal code power of described HSDPA reporting of user is less than the number of times of preset signals intensity threshold, if the number of times of adding up is greater than default number of times, by privately owned interface, to described base station, issue described notice;
Or, NodeB determines the signal impulse response intensity of the training sequence that described HSDPA user uses by multi-cell joint detection MCJD algorithm, if described intensity lower than default signal impulse response intensity threshold, judges described in this that HSDPA user is in cell edge;
Or NodeB measures described HSDPA user's uplink interference signal code power ISCP, when described ISCP measurement result is greater than default interference strength threshold value, judge that described HSDPA user is in cell edge.
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| CN104333865B (en) * | 2014-11-19 | 2018-12-18 | 北京北方烽火科技有限公司 | A kind of cooperative multi-point CoMP resource allocation methods and device |
| CN107889267B (en) * | 2016-11-30 | 2019-08-23 | 电信科学技术研究院有限公司 | Uplink is based on the nonopiate method and apparatus for exempting from scheduling |
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| CN101043693A (en) * | 2006-03-23 | 2007-09-26 | 华为技术有限公司 | Method and system for inter-cell eliminating interference |
| CN101594173A (en) * | 2008-05-27 | 2009-12-02 | 鼎桥通信技术有限公司 | Carrier wave in a kind of multicarrier system and power distribution method |
| CN101674681A (en) * | 2008-09-09 | 2010-03-17 | 鼎桥通信技术有限公司 | Access method in same frequency network with N frequency points |
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| US7236793B2 (en) * | 2001-01-31 | 2007-06-26 | Ipr Licensing, Inc. | Queuing far/far service requests in wireless network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043693A (en) * | 2006-03-23 | 2007-09-26 | 华为技术有限公司 | Method and system for inter-cell eliminating interference |
| CN101594173A (en) * | 2008-05-27 | 2009-12-02 | 鼎桥通信技术有限公司 | Carrier wave in a kind of multicarrier system and power distribution method |
| CN101674681A (en) * | 2008-09-09 | 2010-03-17 | 鼎桥通信技术有限公司 | Access method in same frequency network with N frequency points |
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