CN100440862C - Packet scheduling method in broadband CDMA mobile communication system - Google Patents
Packet scheduling method in broadband CDMA mobile communication system Download PDFInfo
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Abstract
The present invention discloses a packet scheduling method in a broadband CDMA mobile communication system, which comprises the following steps: (1) packet services in the broadband CDMA system are configured with corresponding lowest fair speeds according to different service operation priorities, and a packet scheduling queue is created; (2) when user equipment initiates a raising speed request to a radio network controller, if sufficient system resources for satisfying the raising speed request are lack at the current, the raising speed request is put in the packet scheduling queue; (3) the packet scheduling queue is scanned periodically, if the packet scheduling queue is not null, existing packet users are scanned to slow down the users with current speeds larger than the corresponding lowest fair speeds of the users according to the priorities; (4) if the packet scheduling is not null and the system resources are enough at the current, speeds are raised as the raising speed request of the users in the packet scheduling queue according to the priorities. The system resources can be fairly utilized in high effect according to the present invention when the system congestion occurs.
Description
Technical field
The present invention relates to WCDMA (Wideband Code Division Multiple Access (WCDMA)) mobile communication system, specifically, relate to the grouping scheduling method in a kind of WCDMA mobile communication system.
Background technology
The downlink capacity of WCDMA system is to be determined by the down transmitting power of sub-district and downgoing channelized codes resource.Descending power and descending sign indicating number resource are shared between all users in the sub-district.The power of a CU and channel code how much by its service rate decision, service rate is high more, power that takies and sign indicating number resource are many more.In order to improve power system capacity, must be according to user's service attribute, Resources allocation reasonably between different user, when improving power system capacity, to embody fair as far as possible.
In the WCDMA system, business is divided into four big kinds according to its Qos (service quality) attribute difference, is respectively session service, stream class service, interaction service and background business.Wherein, session service and stream class service require guaranteed speed, and system must guarantee that for the bandwidth resources of its distribution this professional transmission rate is not less than it and guarantees speed.And interaction service and background business do not guarantee the requirement of speed, and system distributes bandwidth for it as much as possible under the situation that resource allows.For a user, when transfer of data, can require bandwidth as much as possible to obtain bigger transmission rate.When system user was many, if all users carry out transfer of data with maximum rate, the system resource situation can't satisfy, and occurred congested.At this moment, some users can occur and send with very big speed always, the other user is because the situation of transfer of data is carried out in application with smaller speed less than bandwidth always.
From disclosed grouping scheduling method, mostly relate to the scheduling of user grouping data, promptly determine the sending order and the transmitting time of user grouping data, data block size of Fa Songing etc. once, and do not relate on the level of a wireless area, how, can not realize the reasonable distribution of the system resource under the system congestion situation for the different grouping user distributes power resource and channelization code resource.As the patent No. is 6,850,509 United States Patent (USP) Scheduling apparatus and method for packet data servicein a wireless communication system, the method that provides a kind of distribution auxiliary channel SCH (Supplemental Channel) and on auxiliary channel, send grouped data.Distributing the method for auxiliary channel is the period that auxiliary channel is divided into different length, distributes to different users, divides timing mainly to consider how to prevent the conflict of time migration.But the different grouping user resources were not shared the problem of distributing when this patent also had taking into account system congested.
In sum, at existing grouping scheduling method, occurring under the congested situation when system, business for different priorities, still some users can occur and send with very big speed always, the other user is because the situation of transfer of data is carried out in application with smaller speed less than bandwidth always.Make system resource reasonably not distributed and to effectively utilize.
Summary of the invention
Technical problem to be solved by this invention provides the grouping scheduling method in a kind of WCDMA mobile communication system.Make to occur under the congested situation that the user also can reasonably be assigned to system resource, can be assigned to the user many system resource low, make all users can both obtain service to a certain extent than priority for the high user of priority in system.
Grouping scheduling method in a kind of WCDMA mobile communication system comprises the steps:
Step 1:, and create the packet scheduling formation with the minimum fair rate of the Packet Service in the broadband CDMA system by its different Business Processing priority configuration correspondence;
Step 2: when subscriber equipment when radio network controller is initiated the raising speed request, if the enough system resource of current shortage satisfies this raising speed request, then this raising speed request is put into described packet scheduling formation queuing;
Step 3: the described packet scheduling formation of periodic scanning, if the packet scheduling formation is not empty, then scan existing grouping user, present rate is wherein carried out the reduction of speed operation greater than the user of the minimum fair rate of its correspondence according to priority;
Step 4: if described packet scheduling is not empty, and currently have enough system resource, then the user's raising speed request in the described packet scheduling formation is carried out the raising speed operation according to priority.
Compared with prior art, the invention has the advantages that:
The present invention realized a kind of in the WCDMA system grouping scheduling method of cell-level, when system congestion, this method can make system resource obtain justice and utilize efficiently, has improved the service quality of system.By for the user of different priorities disposes minimum fair rate, make user also can be assigned to certain system resource with lowest priority, prevent that low priority user from can not get the situation of serving for a long time, embodied fairness; By for the user of different priorities disposes different minimum fair rates, can make operator realize different operation tariff policy flexibly and easily, the system that makes has more flexibility; Once carry out the maximum number of user of raising speed and the maximum number of user of a reduction of speed by flexible configuration, can make system stable, prevent the undue fluctuation of system loading.
Technical problem to be solved by this invention, technical scheme main points and beneficial effect will be in conjunction with the embodiments, are further described with reference to accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram of grouping scheduling method of the present invention;
Fig. 2 is a radio bearer reprovision process schematic diagram;
Fig. 3 is the flow chart of grouping scheduling method of the present invention;
Fig. 4 is the process chart of subscriber equipment after radio network controller is initiated the raising speed request;
Fig. 5 is that system is under the congestion situation, the process chart of reduction of speed process;
Fig. 6 is current process chart when having enough system resource to satisfy the raising speed request.
Embodiment
The present invention is the different minimum fair rate of grouping user configuration of different priorities, and when system congestion, a grouping user can be assigned to the desired resource of minimum fair rate at least like this.At this moment, the raising speed request of low speed user is placed into the packet scheduling formation and ranks, system cycle carries out packet scheduling, speed is lower than the user of minimum fair rate can raising speed, and speed be higher than the user of minimum fair rate will be by reduction of speed, the resource of its release is used to improve the speed of low speed user, as shown in Figure 1.
Here, be to finish to the adjustment of grouping user speed, as shown in Figure 2 by the radio bearer reprovision process of wave point.Radio network controller (RNC) sends " radio bearer reprovision " message to subscriber equipment (UE), has comprised the transmission format set information corresponding with new service rate in the message.When reduction of speed,, realize that speed reduces one-level, till speed reaches minimum fair rate with transformat corresponding in original transmission format set deletion from set with current flank speed.During raising speed, in original transmission format set, increase the transformat of a two-forty, realize speed rising one-level.UE is configured according to message content after receiving " radio bearer reprovision " message, sends " wireless link reconfigured finishing " message to RNC after finishing, and finishes the speed adjustment process.
In the WCDMA system, packet domain (PS territory) business comprises stream class service, interaction service, background business.Priority orders between these several business is stream class service＞interaction service＞background business.Carry out the division of priority with Business Processing priority (Traffic HandlingPriority is hereinafter to be referred as THP) between the different interaction services.THP has 15 kinds of priority from 1～15, and priority is the highest during THP=1, and priority is minimum during THP=15.Like this, the priority one of packet scheduling has 17 grades, promptly flow class＞interactive class THP1＞interactive class THP2＞...＞interactive class THP15＞background classes.
With reference to Fig. 3, at the minimum fair rate of OMC (Operation and Maintenance Center, operation and maintenance centre) configuration different priorities, as shown in the table in advance:
| Type of service | Packet scheduling priority (value is more little, and priority is high more) | Minimum fair rate (kbps) |
| Stream class service | 1 | 128 |
| Interactive class THP1 | 2 | 64 |
| Interactive class THP2 | 3 | 64 |
| Interactive class THP3 | 4 | 64 |
| Interactive class THP4 | 5 | 64 |
| Interactive class THP5 | 6 | 64 |
| Interactive class THP6 | 7 | 32 |
| Interactive class THP7 | 8 | 32 |
| Interactive class THP8 | 9 | 32 |
| Interactive class THP9 | 10 | 32 |
| Interactive class THP10 | 11 | 32 |
| Interactive class THP11 | 12 | 16 |
| Interactive class THP12 | 13 | 16 |
| Interactive class THP13 | 14 | 16 |
| Interactive class THP14 | 15 | 16 |
| Interactive class THP15 | 16 | 16 |
| Background business | 17 | 16 |
When system congestion was carried out packet scheduling, present rate is lower than the user of minimum fair rate can raising speed, and present rate be higher than the user of minimum fair rate will be by reduction of speed.For stream class service, because the requirement of minimum assurance speed is arranged, so can not be lower than its desired minimum assurance speed to the minimum fair rate of stream class service configuration.
UE wishes to improve the transmission rate of Packet Service according to the current data transmission requirement, initiates the raising speed request to RNC.RNC receives the raising speed request of UE, at first judges the current raising speed request that whether has enough resources to satisfy the user.If then be user's raising speed.Otherwise, packet scheduling formation queuing is put in the request of UE.
The described packet scheduling formation of RNC periodic scanning if the packet scheduling formation is not empty, then scans existing grouping user, therefrom finds out the user of present rate greater than minimum fair rate, and sorts according to packet scheduling priority.Therefrom take out then and come a rearmost M user, carry out the reduction of speed operation, its speed is reduced one-level.RNC sends " radio bearer reprovision " message to the UE that wants reduction of speed, comprises the speed corresponding transmission format set configuration new with UE in message.After UE receives, revise configuration, realize reduction of speed, send " the radio bearer reprovision is finished " message to RNC after finishing according to message content.
RNC periodically scans the packet scheduling formation.If described packet scheduling is not empty, and current have enough system resource, and RNC sorts the user's raising speed request in the packet scheduling formation according to its packet scheduling priority, therefrom takes out N the user who comes the front then, the operation of execution raising speed, speed rising one-level.RNC sends " radio bearer reprovision " message to the UE that wants raising speed, comprises the speed corresponding transmission format set configuration new with UE in message.After UE receives, revise configuration, realize raising speed, send " the radio bearer reprovision is finished " message to RNC after finishing according to message content.
As shown in Figure 4, the handling process of subscriber equipment after radio network controller is initiated the raising speed request:
At first, subscriber equipment is initiated raising speed request (step 401) according to the data traffic of current group business; Radio network controller is received the raising speed request, and whether the inquiry packets scheduling queue is empty, if empty, then execution in step 403, otherwise, execution in step 406 (step 402); Then, judge whether current system resource allows raising speed, if allow, then execution in step 404, otherwise, execution in step 408 (step 403); Radio network controller reconfigures transmission format set, increases the transformat (step 404) of a high speed in existing transmission format set; Radio network controller is initiated radio bearer reprovision flow process, and the order subscriber equipment is enabled new transmission format set (step 405); Radio network controller is inquired about the minimum fair rate (step 406) that obtains its corresponding packet scheduling priority and disposed according to the type of Packet Service; Whether judge the subscriber equipment current group service rate of asking raising speed more than or equal to minimum fair rate, if then execution in step 409, otherwise, execution in step 408 (step 407); The packet scheduling formation wait (step 408) of ranking is put in the raising speed request of subscriber equipment; Refuse the raising speed request (step 409) of described subscriber equipment.
As shown in Figure 5, the formation of RNC periodic test packet scheduling if the packet scheduling formation is not empty, shows that current system is in congestion state, needs to reduce a part of high-speed packet user's speed, discharges resource, to satisfy low speed packet user's raising speed request.Reduction of speed user's selection principle is: 1) the current group service rate is greater than minimum fair rate; 2) choose according to packet scheduling priority order from low to high.3) user's number of a reduction of speed is no more than M, and M can be configured as required.
At first, find out that all have the user (step 501) of the present rate of Packet Service and Packet Service greater than minimum fair rate in the sub-district; Described grouping user is sorted according to packet scheduling priority order from low to high, if priority is identical, then according to current group service rate rank order (step 502) from high to low; First user who gets in the ranking results is current scheduling user, makes this modulated degree number of users n=0 (step 503); For current scheduling user, delete the highest transformat (step 504) of speed in its transmission format set; Whether the maximum rate of judging new TFS Transport Format Set correspondence less than minimum fair rate, if, execution in step 507, otherwise execution in step 506 (step 505); Initiate radio bearer reprovision flow process, notifying user equipment is enabled new transmission format set, modulated degree number of users n=n+1 (step 506); Whether judge this modulated degree number of users n more than or equal to the maximum number of user M that once dispatches reduction of speed, if execution in step 509 finishes this scheduling, otherwise execution in step 508 (step 507); The next user who gets in the ranking results is current scheduling user, execution in step 504 (step 508); Finish this scheduling (step 509).
As shown in Figure 6, the formation of RNC periodic test packet scheduling, if the packet scheduling formation is not empty, then carry out the scheduling of packet queue, from formation, take out N user's raising speed request according to certain rule, adjudicate successively, if current resource situation allows user's raising speed, then carry out raising speed, otherwise continue queuing.N is maximum user's number of a dispatching office admittance, can be configured as required.
At first, the overtime raising speed request (step 601) of queuing in the formation of deletion packet scheduling; Raising speed request in the packet scheduling formation is sorted according to packet scheduling priority order from high to low, and the priority according to the time of advent that priority is identical sorts, and n=0 (step 602) is counted in the modulated degree raising speed request that is provided with before the scheduling beginning; First raising speed request is set to current scheduling raising speed request (step 603) in the ordering packet scheduling formation; For current scheduling user, with the whole transformat (step 604) that adds a two-forty in the transmission format set of subscriber equipment; Judge whether current system resource allows the raising speed request, if then execution in step 606, otherwise, execution in step 607 (step 605); Described raising speed request is deleted from the packet scheduling formation, and initiate radio bearer reprovision flow process, notifying user equipment is enabled new transmission format set, and the request of modulated degree raising speed is set counts n=n+1, execution in step 608 (step 606); Described raising speed request continues queuing (step 607); Judge that this dispatches the request of modulated degree raising speed and count n and whether count N more than or equal to the maximum raising speed request of once scheduling, if then execution in step 610; Otherwise, execution in step 609 (step 608); The next raising speed request of getting in the packet scheduling formation of sorting is the request of current scheduling raising speed, execution in step 604 (step 609); Finish this scheduling (step 610).
Grouping scheduling method in a kind of WCDMA mobile communication system of the present invention, be not restricted to listed utilization in specification and the execution mode, it can be applied to various suitable the present invention's field fully, for those skilled in the art, can easily realize additional advantage and make amendment, therefore under the situation of the spirit and scope of the universal that does not deviate from claim and equivalency range and limited, the examples shown that the present invention is not limited to specific details, representational equipment and illustrates here and describe.
Claims (12)
1, the grouping scheduling method in a kind of WCDMA mobile communication system is characterized in that comprising the steps:
Step 1:, and create the packet scheduling formation with the minimum fair rate of the Packet Service in the broadband CDMA system by its different Business Processing priority configuration correspondence;
Step 2: when subscriber equipment when radio network controller is initiated the raising speed request, if the enough system resource of current shortage satisfies this raising speed request, then this raising speed request is put into described packet scheduling formation queuing;
Step 3: the described packet scheduling formation of periodic scanning, if the packet scheduling formation is not empty, then scan existing grouping user, present rate is wherein carried out the reduction of speed operation greater than the user of the minimum fair rate of its correspondence according to priority;
Step 4: if described packet scheduling formation is not empty, and currently have enough system resource, then the user's raising speed request in the described packet scheduling formation is carried out the raising speed operation according to priority.
2, grouping scheduling method according to claim 1 is characterized in that: different dispatching priorities described in the step 1 are stream class service＞interaction service＞background business.
3, grouping scheduling method according to claim 1 is characterized in that: when Packet Service was stream class service, described minimum fair rate was more than or equal to its desired minimum guarantee speed.
4, grouping scheduling method according to claim 1 is characterized in that: described in the step 2 when subscriber equipment when radio network controller is initiated the raising speed request, if there is enough system resource to satisfy this raising speed request, then directly carry out the raising speed operation.
5, grouping scheduling method according to claim 1, it is characterized in that: described in the step 3 present rate being carried out the reduction of speed operation greater than the user of the minimum fair rate of its correspondence according to priority is to find out the user of present rate greater than minimum fair rate from existing grouping user, and sort according to packet scheduling priority, therefrom find out the user who comes the back and carry out the reduction of speed operation.
6, grouping scheduling method according to claim 1, it is characterized in that: described to carry out reduction of speed operation be to send " radio bearer reprovision " message by radio network controller to subscriber equipment, subscriber equipment is realized reduction of speed, realizes to radio network controller transmission " the radio bearer reprovision is finished " message.
7, grouping scheduling method according to claim 1, it is characterized in that: in the step 4 user's raising speed request in the described packet scheduling formation being carried out the raising speed operation according to priority is that the user's raising speed request in the packet scheduling formation is sorted by its packet scheduling priority, therefrom takes out the user who comes the front and carries out the raising speed operation.
8, grouping scheduling method according to claim 1, it is characterized in that: carrying out the raising speed operation described in the step 4 is to send " radio bearer reprovision " message by radio network controller to subscriber equipment, subscriber equipment is realized raising speed, realizes to radio network controller transmission " the radio bearer reprovision is finished " message.
9, according to claim 6 or 8 described grouping scheduling methods, it is characterized in that: described " radio bearer reprovision " message comprises the speed corresponding transmission format set configuration new with subscriber equipment.
10, grouping scheduling method according to claim 1 is characterized in that: when described subscriber equipment is initiated the raising speed request to radio network controller, further comprise the steps:
Step 401: subscriber equipment is initiated the raising speed request according to the data traffic of current group business;
Step 402: radio network controller is received the raising speed request, and whether the inquiry packets scheduling queue is empty, if empty, then execution in step 403, otherwise, execution in step 406;
Step 403: judge whether current system resource allows raising speed, if allow, then execution in step 404, otherwise, execution in step 408;
Step 404: radio network controller reconfigures transmission format set, increases the transformat of a high speed in existing transmission format set;
Step 405: radio network controller is initiated radio bearer reprovision flow process, and the order subscriber equipment is enabled new transmission format set;
Step 406: radio network controller is inquired about the minimum fair rate that obtains its corresponding packet scheduling priority and disposed according to the type of Packet Service;
Step 407: whether judge the subscriber equipment current group service rate of asking raising speed more than or equal to minimum fair rate, if then execution in step 409, otherwise, execution in step 408;
Step 408: the packet scheduling formation wait of ranking is put in the raising speed request of subscriber equipment;
Step 409: refuse the raising speed request of described subscriber equipment.
11, grouping scheduling method according to claim 5 is characterized in that: described step 3 further comprises the steps:
Step 501: find out that all have the user of the present rate of Packet Service and Packet Service greater than minimum fair rate in the sub-district;
Step 502: described grouping user is sorted according to packet scheduling priority order from low to high, if priority is identical, then according to current group service rate rank order from high to low;
Step 503: first user who gets in the ranking results is current scheduling user, makes this modulated degree number of users n=0;
Step 504:, delete the highest transformat of speed in its transmission format set for current scheduling user;
Step 505: whether the maximum rate of judging new TFS Transport Format Set correspondence less than minimum fair rate, if, execution in step 507, otherwise execution in step 506;
Step 506: initiate radio bearer reprovision flow process, notifying user equipment is enabled new transmission format set, modulated degree number of users n=n+1;
Step 507: whether judge this modulated degree number of users n more than or equal to the maximum number of user M that once dispatches reduction of speed, if execution in step 509 finishes this scheduling, otherwise execution in step 508;
Step 508: the next user who gets in the ranking results is current scheduling user, execution in step 504;
Step 509: finish this scheduling.
12, grouping scheduling method according to claim 7 is characterized in that: described step 4 further comprises the steps:
Step 601: the overtime raising speed request of queuing in the formation of deletion packet scheduling;
Step 602: the raising speed request in the packet scheduling formation is sorted according to packet scheduling priority order from high to low, and the priority according to the time of advent that priority is identical sorts, and n=0 is counted in the modulated degree raising speed request that is provided with before the scheduling beginning;
Step 603: first raising speed request is set to the request of current scheduling raising speed in the ordering packet scheduling formation;
Step 604:, will increase the transformat of a two-forty in the transmission format set of subscriber equipment for current scheduling user;
Step 605: judge whether current system resource allows the raising speed request, if then execution in step 606, otherwise, execution in step 607;
Step 606: described raising speed request is deleted from the packet scheduling formation, and initiate radio bearer reprovision flow process, notifying user equipment is enabled new transmission format set, and the request of modulated degree raising speed is set counts n=n+1, execution in step 608;
Step 607: described raising speed request continues queuing;
Step 608: judge that this dispatches the request of modulated degree raising speed and count n and whether count N more than or equal to the maximum raising speed request of once scheduling, if then execution in step 610; Otherwise, execution in step 609;
Step 609: the next raising speed request of getting in the packet scheduling formation of sorting is the request of current scheduling raising speed, execution in step 604;
Step 610: finish this scheduling.
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| CN101765160B (en) * | 2008-12-23 | 2015-05-20 | 中兴通讯股份有限公司 | Wireless bandwidth resource dynamic allocation method |
| CN102196500B (en) * | 2010-03-11 | 2015-06-10 | 中兴通讯股份有限公司 | Network element load control method and IP-CAN (Internet Protocol-Connectivity Access Network) network element |
| CN107800646B (en) * | 2017-11-06 | 2019-10-15 | 国网山东省电力公司电力科学研究院 | A kind of communication task adaptive optimization dispatching method for supporting dynamic flow to control |
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