CN104427626B - Semi-static scheduling method and system - Google Patents
Semi-static scheduling method and system Download PDFInfo
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- CN104427626B CN104427626B CN201310373591.2A CN201310373591A CN104427626B CN 104427626 B CN104427626 B CN 104427626B CN 201310373591 A CN201310373591 A CN 201310373591A CN 104427626 B CN104427626 B CN 104427626B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The present invention relates to a kind of Semi-static scheduling method and system, the Semi-static scheduling method includes：Initiate service call；In the case where judging that downstream service flow suitably uses semi-persistent scheduling mechanism, at least one user equipment corresponding with the service call is searched；Group service control channel is established with least one user equipment found；At least one user equipment receives communication system control message in the group service control channel, and the semi-static scheduling cycle information corresponding with the service call and the identification code of at least one user equipment are added in the communication system control message；At least one user equipment carries out corresponding configuration according to the semi-static scheduling cycle information received, and base station is distributed by Physical Downlink Control Channel to activate or change the resource block of semi-persistent scheduling；Into the service call.Thus, physical downlink control channel resource is saved, reduces interfering for minizone Physical Downlink Control Channel, saves the process resource of user equipment.
Description
Technical field
The present invention relates to wireless communication technology field, and in particular to a kind of Semi-static scheduling method and system.
Background technology
In Long Term Evolution（LTE）In system, cluster multi call business is a kind of point-to-multipoint business, in specialized communication field
Play huge effect.
Group-calling service allows user to establish to the group call for belonging to a certain group of user in a certain given area, using half-duplex
Pattern；During group calling communication, any member can turn into talker in group, but any instant only allows have a speech
Person, other users are hearer.The given area is referred to as group call region, including cluster cell.During call setup, system is
Each cell in group call region distributes a group-calling channel respectively, and wherein up-link only uses for current speakers, owns
Hearer monitors downlink；Hearer can obtain speaking right by seizing the operation of up-link.Due in group-calling service, belonging to
In one downlink of users to share in all groups in same cell, up-link is seized, therefore wireless money can be greatlyd save
Source, improve the availability of frequency spectrum of system.
But existing cluster multi call business uses dynamic dispatching, in each Transmission Time Interval（TTI）All set for user
It is standby（UE）A Radio Resource is distributed, occupies limited Physical Downlink Control Channel（PDCCH）Resource；Because more business exist
Dispatched on PDCCH, interfering for minizone PDCCH channels is higher；And, it is necessary to each for each cluster UE
TTI monitors the signal on PDCCH, but is not that each TTI has business datum transmission, even if the TTI without business datum
Need to take UE process resources and power consumption.
The content of the invention
The technical problems to be solved by the invention are the problem of PDCCH channel resources waste in group-calling service.
For this purpose, the present invention proposes a kind of Semi-static scheduling method, including：Initiate service call；Judge it is descending
In the case that Business Stream suitably uses semi-persistent scheduling mechanism, search at least one user corresponding with the service call and set
It is standby；Group service control channel is established with least one user equipment found；At least one user equipment exists
Communication system control message, and addition and institute in the communication system control message are received in the group service control channel
State the corresponding semi-static scheduling cycle information of service call and the identification code of at least one user equipment；Described at least one
Individual user equipment carries out corresponding configuration according to the semi-static scheduling cycle information received, and base station is controlled by physical down
Channel distributes to activate or change the resource block of semi-persistent scheduling；Into the service call.
Preferably, the business includes LTE cluster communication services and 3GPP group communication service.
Preferably, it is described suitably using the downstream service flow of semi-persistent scheduling mechanism include packet is small, size substantially not
Change and periodically obvious Business Stream.
Preferably, it is described suitably using semi-persistent scheduling mechanism downstream service flow include voice-over-net telephone service and
Video flowing, the streaming data services of cbr (constant bit rate).
Preferably, the communication system control message is that group is exhaled and establishes request message, system broadcast message or group and exhale paging
Message.
Preferably, the above method also includes：Judging that downstream service flow is not suitable for the situation using semi-persistent scheduling mechanism
Under, resource block is distributed by the way of dynamic dispatching.
Preferably, the above method also includes：After the completion of the service call, the semi-persistent scheduling is discharged
The invention also discloses a kind of semi-persistent scheduling system, including：Initiation module is called, initiates service call；Judge
Module, judges whether downstream service flow suitably uses semi-persistent scheduling mechanism；Module is paged, is judged in the judge module descending
Business Stream searches at least one user equipment corresponding with the service call when suitably using semi-persistent scheduling mechanism；Channel
Module is established, group service control channel is established with least one user equipment found；Receiving module, in the collection
Communication system control message is received in group business control channel, and is added and the business in the communication system control message
Call corresponding semi-static scheduling cycle information and the identification code of at least one user equipment；Configuration module, according to institute
State the semi-static scheduling cycle information that receiving module receives and corresponding configuration is carried out at least one user equipment；Swash
Work/modified module, distributed by Physical Downlink Control Channel to activate or change the resource block of semi-persistent scheduling；Service call mould
Block, the service call is carried out after the activation/modified module activation or the resource block distribution of modification semi-persistent scheduling.
Preferably, said system also includes：Release module, after the completion of the service call, discharge the semi-static tune
Degree.
Preferably, said system also includes：Dynamic dispatching module, judge that downstream service flow is not suitable in the judge module
In the case of using semi-persistent scheduling mechanism, resource block is distributed by the way of dynamic dispatching.
Semi-static scheduling method disclosed in this invention and system have the following advantages that：
1st, PDCCH resource is saved, more users can be dispatched.For typical VoIP voices intensity LTE system,
PDCCH resource is the bottleneck of system.In LTE system, voip user's number that its bandwidth can be supported is that it can dispatch instruction
5 times or so of number of users, then, for VoIP business, the deficiency of LTE system control information will greatly limit its institute together
When the number of users supported.SPS breaks limitation of the system control resource to user capacity, the number of users that can be improved while dispatch；
2nd, interfering for minizone PDCCH channels is reduced.Preceding 3 OFDM symbols of PDCCH row time slots in each of the lower
Interior transmission, inter-cell interference is than more serious.SPS can reduce Downlink Control Information（DCI）Transmission, advantageously reduce minizone
PDCCH channels interfere.
3rd, can be remaining PDCCH control channel unit for the poor environment of the PDCCH signals such as cell edge
（CCE）Resource polymerization is got up, and the UE poor to signal is used, and is improved adverse circumstances UE DCI detection performances, is reduced DCI's
Probability of false detection.
4th, cluster communication is applicable not only to, the group communication being also applied in 3GPP later releases.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to accompanying drawing, accompanying drawing is schematical and do not understood
To carry out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 shows the stream of the Semi-static scheduling method of downlink in LTE group systems according to embodiments of the present invention
Cheng Tu；
Fig. 2 shows showing for the semi-persistent scheduling system of downlink in LTE group systems according to embodiments of the present invention
It is intended to.
Embodiment
Main idea is that introduce semi-persistent scheduling in cluster LTE group-calling services（SPS）Mechanism, to save
PDCCH resource, interfering for minizone PDCCH channels is reduced, save UE process resources.
A Radio Resource difference is distributed with being appointed as UE by PDCCH in each TTI during dynamic dispatching, SPS allows half
Static configuration Radio Resource, and distribute to some particular UE by the resource period.Briefly, eNB uses in some TTI
SPS Cell Radio Network Temporary Identifier/Identity, Cell-RNTIs（C-RNTI）The PDCCH of scrambling specifies Radio Resource used in UE（It is herein referred to as
SPS resources）, a cycle is often crossed, UE just receives or sent out data using the SPS resources.ENB is without in the subframe（Here by it
Referred to as SPS subframes）Issue the resource that PDCCH carrys out assignment of allocation.
But after UE is configured with SPS, it can't use immediately, it is necessary to which the PDCCH scrambled using SPS C-RNTI is carried out
Activation.The PDCCH that eNB is scrambled by SPS C-RNTI activates/discharged UE SPS.After it have activated SPS, UE cans week
Data are received and send using the SPS resources of configuration to phase property.SPS is small to packet, and size is basically unchanged and periodicity is bright
Aobvious business is very useful, such as voice-over-net phone（VoIP）Business, cbr (constant bit rate) multimedia communication service etc..Because SPS has
The characteristics of " primary distribution, cycle use ", it is not necessary to issue Downlink Control Information in each TTI for UE（DCI）, so as to reduce
Corresponding PDCCH expenses.
Below in conjunction with accompanying drawing, embodiments of the present invention is described in detail.
Fig. 1 shows the stream of the Semi-static scheduling method of downlink in LTE group systems according to embodiments of the present invention
Cheng Tu.As shown in figure 1, this method includes：
Step S101：Initiate the calling of LTE group services.
Step S102：Judge whether downstream service flow suitably uses semi-persistent scheduling mechanism, i.e. base station judges downlink business
Whether stream is that packet is small, size is basically unchanged and periodically obvious Business Stream（Such as VOIP business, the video of cbr (constant bit rate)
Stream, streaming data services etc.）, if it is not, then into step S109, i.e., resource block is distributed by the way of dynamic dispatching（RB）,
If it is, into step S103.
Step S103：The base station lookups UE corresponding with service call.It should be noted that UE can be single, also may be used
To be multiple cluster UE groups, and.
Step S104：Vertical group service control channel is set up with the UE or UE found；
Step S105：UE or UE groups receive communication system control message in group service control channel（Such as group, which is exhaled, builds
Vertical request message, system broadcast message or group exhale beep-page message etc.）, and addition and business in the communication system control message
Call corresponding SPS cycle informations and the identification code of the UE or UE groups.
Step S106：UE or UE groups carry out corresponding configuration according to the SPS cycle informations received, but can't make immediately
With, it is necessary to base station by PDCCH channels come the resource block that activates or change SPS（RB）Distribution.
Step S107：After activating or have modified SPS, UE cans are periodically connect using the SPS resources of configuration
Receive and send data, hence into service call state.
Step S108：Service call is completed, and discharges SPS.
It should be noted that the Semi-static scheduling method in the embodiment of the present invention is applicable not only to LTE cluster communication services, it is also suitable
For the group communication service in 3GPP later releases.In order to improve colony terminal with the compatibility of 3GPP terminals, it is necessary to as far as possible
3GPP SPS decoding mechanism is reused, the configuration using SPS current mechanism, such as SPS passes through RRC information（Configuration cycle property
Parameter）, enable for the first time or modification resource block RB numbers pass through PDCCH（RB numbers are distributed during enabled for the first time or modification）,
The mechanism such as recessiveness release.
Hereinafter, so that group is exhaled and establishes request message as an example, the international standard language ASN.1 using description communications protocol format shows
Illustrate to exhale in group to example property and establish addition SPS configuration informations in request message（Hereinafter represented with italic cell）Mode.
Wherein, the NAS message that the DedicatedInfoNAS that trunked call is established in request message is included is trunked call
Request message.
Correspondingly, the invention also discloses a kind of semi-persistent scheduling system of downlink in LTE group systems.Such as Fig. 2
Shown, the semi-persistent scheduling system includes：
Initiation module 201 is called, initiates service call；
Judge module 202, judges whether downstream service flow suitably uses SPS mechanism；
Module 203 is paged, searches when judge module 202 judges that downstream service flow suitably uses SPS mechanism and is exhaled with business
It is corresponding UE or UE groups；
Channel establishes module 204, and vertical group service control channel is set up with the UE or UE found；
Receiving module 205, communication system control message is received in group service control channel, and in the communication system control
The SPS cycle information corresponding with service call and the identification code of the UE or UE groups are added in message processed；
Configuration module 206, corresponding configuration is carried out to UE or UE groups according to the SPS cycle informations that receiving module 205 receives；
Activation/modified module 207, distributed by PDCCH channels to activate or change SPS resource block；
Service call module 208, the resource block for activating or changing SPS in activation/modified module 207 distribute laggard industry business
Calling；
Release module 209, after the completion of service call, discharge SPS；
Dynamic dispatching module 210, when judge module 202 judges that downstream service flow is not suitable for using SPS mechanism, using dynamic
The mode of state scheduling distributes RB resources.
Corresponding with the above Semi-static scheduling method, semi-persistent scheduling system according to embodiments of the present invention is not
Only go for LTE cluster communication services, can be applicable to 3GPP group communication service, and receiving module 205 is connect
The communication system control message received can be that group is exhaled and establishes request message, system broadcast message and group and exhale beep-page message.
By using Semi-static scheduling method and system according to embodiments of the present invention, PDCCH resource can be saved, is improved
The number of users of scheduling simultaneously, interfering for minizone PDCCH channels is reduced, save UE process resources.
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair
Various modification can be adapted in the case of bright spirit and scope and modification, and such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (9)
1. a kind of Semi-static scheduling method, including：
Initiate service call；
In the case where judging that downstream service flow suitably uses semi-persistent scheduling mechanism, search corresponding with the service call
At least one user equipment；
Group service control channel is established with least one user equipment found；
At least one user equipment receives communication system control message in the group service control channel, and described
The semi-static scheduling cycle information corresponding with the service call and described at least one is added in communication system control message
The identification code of user equipment, the communication system control message are that group is exhaled to establish request message, system broadcast message or group and exhale and sought
Exhale message；
At least one user equipment carries out corresponding configuration according to the semi-static scheduling cycle information received, and base station leads to
Physical Downlink Control Channel is crossed to activate or change the distribution of the resource block of semi-persistent scheduling；
Into the service call.
2. according to the method for claim 1, wherein, the business includes LTE cluster communication services and 3GPP group communication
Business.
3. the method according to claim 11, wherein, it is described suitably to be included using the downstream service flow of semi-persistent scheduling mechanism
Packet is small, size is basically unchanged and periodically obvious Business Stream.
4. the method according to claim 11, wherein, it is described suitably to be included using the downstream service flow of semi-persistent scheduling mechanism
The video flowing of voice-over-net telephone service and cbr (constant bit rate), streaming data services.
5. method according to any one of claim 1 to 4, in addition to：Judging that downstream service flow is not suitable for using half
In the case of static scheduling mechanism, resource block is distributed by the way of dynamic dispatching.
6. method according to any one of claim 1 to 4, in addition to：After the completion of the service call, described in release
Semi-persistent scheduling.
7. a kind of semi-persistent scheduling system, including：
Initiation module is called, initiates service call；
Judge module, judges whether downstream service flow suitably uses semi-persistent scheduling mechanism；
Module is paged, is searched and the industry when the judge module judges that downstream service flow suitably uses semi-persistent scheduling mechanism
Business calls corresponding at least one user equipment；
Channel establishes module, and group service control channel is established with least one user equipment found；
Receiving module, communication system control message is received in the group service control channel, and in the communication system control
The semi-static scheduling cycle information corresponding with the service call and at least one user equipment are added in message processed
Identification code, the communication system control message are that group is exhaled and establishes request message, system broadcast message or group and exhale beep-page message；
Configuration module, the semi-static scheduling cycle information received according to the receiving module is at least one user
Equipment carries out corresponding configuration；
Activation/modified module, distributed by Physical Downlink Control Channel to activate or change the resource block of semi-persistent scheduling；
Service call module, institute is carried out after the activation/modified module activation or the resource block distribution of modification semi-persistent scheduling
State service call.
8. system according to claim 7, in addition to：Release module, after the completion of the service call, release described half
Static scheduling.
9. system according to claim 7, in addition to：
Dynamic dispatching module, judge that downstream service flow is not suitable for the situation using semi-persistent scheduling mechanism in the judge module
Under, resource block is distributed by the way of dynamic dispatching.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106162914B (en) * | 2015-04-22 | 2020-05-08 | 普天信息技术有限公司 | Semi-static and dynamic hybrid scheduling method in LTE system |
| CN106303977B (en) * | 2015-05-14 | 2019-09-06 | 普天信息技术有限公司 | Method for releasing resource, base station and the UE of TD-LTE cluster multi call |
| CN106604404B (en) * | 2015-10-20 | 2020-07-17 | 大唐移动通信设备有限公司 | Service scheduling method and device |
| CN105323838A (en) * | 2015-12-14 | 2016-02-10 | 魅族科技（中国）有限公司 | Data transmission method and data transmission device for ultra-dense networks |
| CN108141849B (en) | 2016-01-25 | 2020-10-02 | Oppo广东移动通信有限公司 | Data transmission method and terminal |
| EP3412092A1 (en) * | 2016-04-12 | 2018-12-12 | Motorola Mobility LLC | Scheduling of transmission time intervals |
| CN106358317B (en) * | 2016-09-21 | 2019-07-09 | 深圳震有科技股份有限公司 | A kind of method and system for realizing LTE air interface multicast |
| CN110178423B (en) * | 2016-11-03 | 2023-12-22 | 皇家飞利浦有限公司 | User equipment, base station, wireless communication network, data signal and method for providing enhanced SPS control and post-handover continuous SPS |
| CN110226356B (en) * | 2018-01-04 | 2021-09-03 | 瑞典爱立信有限公司 | Method, network equipment and terminal equipment for semi-persistent scheduling |
| CN111447682B (en) * | 2019-01-17 | 2023-05-30 | 大唐移动通信设备有限公司 | Service data transmission method and device and communication node |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8422448B2 (en) * | 2010-08-09 | 2013-04-16 | Alcatel Lucent | Group call control in a wireless broadband communication network |
| CN102056174B (en) * | 2010-12-16 | 2014-03-12 | 大唐移动通信设备有限公司 | Resource scheduling method and device and base station |
| CN102595600B (en) * | 2011-01-17 | 2014-12-31 | 华为技术有限公司 | Semi-static scheduling method, user equipment and network device |
| CN103024680B (en) * | 2011-09-20 | 2016-05-18 | 鼎桥通信技术有限公司 | Semi-persistent scheduling Activiation method and the trunked communication system based on semi-persistent scheduling |
| CN103139717B (en) * | 2011-11-30 | 2015-11-25 | 鼎桥通信技术有限公司 | Group service dispatching method, base station and subscriber equipment |
| CN103167552B (en) * | 2011-12-16 | 2015-09-16 | 鼎桥通信技术有限公司 | Semi-static physical resource dynamic coordinate method and scheduler |
| CN103166737B (en) * | 2011-12-16 | 2016-03-16 | 鼎桥通信技术有限公司 | Group service method for scrambling, de-scrambling method, base station and subscriber equipment |
| CN103200530B (en) * | 2012-01-05 | 2016-12-14 | 华为技术有限公司 | A kind of method and device realizing cluster multi call business |
| CN103079274A (en) * | 2013-01-06 | 2013-05-01 | 中兴通讯股份有限公司 | Method and base station for configuring dispatching resources for cluster system |
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