CN109842936A - A kind of cell-level multicast subframe scheduling method based on broadband cluster communication - Google Patents
A kind of cell-level multicast subframe scheduling method based on broadband cluster communication Download PDFInfo
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Abstract
This application provides a kind of cell-level multicast subframe scheduling method based on broadband cluster communication, this method comprises: being directed to any multicast period, the downlink subframe that specific multicast occupies is configured, the downlink subframe except the downlink subframe that specific multicast occupies is the downlink subframe that nonspecific multicast occupies；If it is determined that current subframe is the downlink subframe that specific multicast occupies, the then multicast service of schedules second type group；If it is determined that current subframe is the downlink subframe that specific non-multicast occupies, then the multicast service of first kind group and the demand (telecommunication) service of ordinary user are dispatched.The program can be realized in the presence of the scheduling for not supporting multicast subframe when receiving the terminal of C-RNTI PDSCH and G-RNTI PDSCH simultaneously.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of cell-level multicast subframe tune based on broadband cluster communication
Degree method.
Background technique
Broadband cluster communication (Boardband Trunking Communication, B-TrunC) is produced by broadband cluster
" LTE Digital Transmission+cluster voice communication " private network broadband cluster system standard based on TD-LTE that industry alliance organization is formulated, should
Agreement is standardized mainly for the broadbands such as cluster voice, cluster video and media colony dispatching group service function, there is spirit
Living bandwidth, spectral efficient, low time delay, high reliability feature, can satisfy professional user to voice cluster, wideband data,
The demands such as emergency command scheduling.
Terminal is described in B-trunc agreement, specific as follows:
For that can support to receive Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Gell Radio Network Temporary simultaneously
Identifier, C-RNTI) physical layer descending share channel (Physical Downlink Share Channel, PDSCH) with
Group's radio network temporary identifier (Group Radio Network Temporary Identifier, G-RNTI) PDSCH's
Terminal, base station do not need then to be staggered this user terminal (UE) C-RNTI PDSCH and G-RNTI PDSCH scheduling instance.
For not supporting to receive C-RNTI PDSCH and G-RNTI simultaneously in a downlink times interval (TTI)
The terminal of PDSCH needs to send G-RNTI MAC CE to base station, and base station receives the G-RNTI that the UE is sent by MAC layer
MAC CE, and UE is then directed to the UE still in wireless heterogeneous networks (Radio Resource Control, RRC) connected state,
Base station can be staggered this UE C-RNTI PDSCH and G-RNTI PDSCH scheduling instance.
For this kind of terminal for not supporting to receive C-RNTI PDSCH Yu G-RNTI PDSCH simultaneously, though B-trunc agreement
The right clear stipulaties condition of triggering " scheduling instance of C-RNTI PDSCH and the G-RNTI PDSCH for this UE that is staggered ", but it is right
The method of scheduling instance of C-RNTI PDSCH and G-RNTI PDSCH of this UE of being how staggered does not provide.
Summary of the invention
In view of this, the application provides a kind of cell-level multicast subframe scheduling method based on broadband cluster communication, it can
It realizes in the presence of the scheduling for not supporting multicast subframe when receiving the terminal of C-RNTI PDSCH and G-RNTI PDSCH simultaneously.
In order to solve the above technical problems, the technical solution of the application is achieved in that
A kind of cell-level multicast subframe scheduling method based on broadband cluster communication, this method comprises:
For any multicast period, configure the downlink subframe that specific multicast occupies, the downlink subframe that specific multicast occupies it
Outer downlink subframe is the downlink subframe that nonspecific multicast occupies；
If it is determined that current subframe is the downlink subframe that specific multicast occupies, the then multicast service of schedules second type group；
If it is determined that current subframe is the downlink subframe that nonspecific multicast occupies, then the multicast service of first kind group is dispatched,
And the demand (telecommunication) service of ordinary user；
Wherein, the second class group is that there are the groups that the second Terminal Type receives the group service；First kind group is not deposit
The group of the group service is received in the second Terminal Type；Second Terminal Type is not support to receive C- simultaneously in a downlink TTI
The terminal of RNTI PDSCH and G-RNTI PDSCH.
As can be seen from the above technical solution, in the application by be pre-configured with specific multicast occupancy downlink subframe position
It sets, on the downlink subframe of the specific multicast occupancy of configuration, the multicast service of schedules second type group；In the nonspecific of configuration
The multicast service of first kind group and the demand (telecommunication) service of ordinary user are dispatched on the downlink subframe that multicast occupies.It can be realized presence
The scheduling of multicast subframe when receiving the terminal of C-RNTI PDSCH and G-RNTI PDSCH simultaneously is not supported.
Detailed description of the invention
Fig. 1 is the schematic diagram for the downlink subframe that specific multicast occupies in the embodiment of the present application；
Fig. 2 is the cell-level multicast subframe scheduling flow diagram based on broadband cluster communication in the embodiment of the present application.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples,
Technical solution of the present invention is described in detail.
A kind of cell-level multicast subframe scheduling method based on broadband cluster communication is provided in the embodiment of the present application, by pre-
The position for the downlink subframe that first configuration specific multicast occupies, on the downlink subframe that occupies of specific multicast of configuration, only scheduling the
The multicast service of two class groups；The multicast service of first kind group is dispatched on the downlink subframe that the nonspecific multicast of configuration occupies
With the demand (telecommunication) service of ordinary user.It can be realized the end for existing and not supporting to receive C-RNTI PDSCH Yu G-RNTI PDSCH simultaneously
The scheduling of multicast subframe when end.
The division mode that the application is directed to group and terminal is provided first below:
Support while receiving the terminal of C-RNTI PDSCH Yu G-RNTI PDSCH in a downlink TTI, referred to as first
Terminal Type；
The terminal for receiving C-RNTI PDSCH Yu G-RNTI PDSCH simultaneously, referred to as are not supported in a downlink TTI
Two Terminal Types.
There are the groups that the second Terminal Type receives the group service, referred to as the second class group；
There is no the groups that the second Terminal Type receives the group service, referred to as first kind group.
Then, it provides and configures the downlink subframe that specific multicast occupies in the embodiment of the present application:
The application technical problems to be solved, can be according to for the specific implementation of sub-frame of uplink for downlink subframe
Existing realization, the application is with no restrictions.
When specific implementation, for any multicast period, the downlink subframe that specific multicast occupies is configured, what specific multicast occupied
Downlink subframe except downlink subframe is the downlink subframe that nonspecific multicast occupies.
Base station first configures the multicast period, and the mode for configuring the downlink subframe that specific multicast occupies in each multicast period has
Body are as follows:
The subframe for the downlink subframe that the initial position and specific multicast for configuring the downlink subframe that specific multicast occupies occupy
Number.
It is the schematic diagram for the downlink subframe that specific multicast occupies in the embodiment of the present application referring to Fig. 1, Fig. 1.
In Fig. 1, pass through the initial position for the downlink subframe that parameter multicast period (GroupPeriod), specific multicast occupy
(Groupoffset), number of sub frames (Groupolength) the configuration specific multicast for the downlink subframe that specific multicast occupies occupies
Downlink subframe, these parameters belong to cell-level parameter.
Wherein, Groupoffset indicates that specific multicast occupies downlink subframe initial position, and base station interface is configurable, configuration
Range (0, GroupPeriodDLFrameNum) is defaulted as 0, i.e., the downlink subframe of specific multicast occupancy is from the multicast period
Which subframe starts；The example provided as shown in figure 1 is 5 downlink subframes of offset, that is, is equivalent to the 6th in the multicast period
A subframe starts as corresponding 1st downlink subframe of specific multicast.
GroupPeriodDLFrameNum is the downlink subframe number in the multicast period.
GroupPeriodDLFrameNum=(GroupPeriod/10) × M；
For TDD:SA0:M=4, SA1:M=6, SA2:M=8；For FDD:M=10；GroupPeriod is on base station circle
Face can match, value range (20,30,40,50,60,70,80,90,100) unit subframe, default 20 unit subframes；
Groupolength indicates the number of sub frames for the downlink subframe that specific multicast occupies, and is initialized as Groupolength_
The configuration of INITIAL, the parameter can adaptively be adjusted according to the load of all multicast services of cell；
Groupolength_INITIAL=max { Groupolength_MIN, floor (Groupolength_MAX/
2)}；
Groupolength_MAX=Floor (GroupPeriodDLFrameNum × GroupFrameRatioMax)；
Wherein, the base station GroupFrameRatioMax interface can match, and configuration may range from 20%~100%, default
50%；
Groupolength_MIN=2.
It, can be according to the negative of all multicast services of cell when the application implements based on the above-mentioned configuration mode provided
Lotus adaptively adjusts the number of the downlink subframe of specific multicast occupancy.
The number of sub frames of specific multicast can carry out adaptive extension according to cell group traffic load and shrink, and specific expansion is shunk
Mechanism is as follows:
Period counts resource block (RB) utilization rate for the downlink subframe that specific multicast occupies, and measurement period is according to actual needs
Configuration, can be 1s；
In measurement period, the RB utilization rate for the downlink subframe that specific multicast occupies is the downlink subframe that specific multicast occupies
The RB number used, the ratio of total RB number of the downlink subframe occupied with specific multicast.
Wherein, the RB number that the downlink subframe that specific multicast occupies in measurement period uses includes downlink in specific multicast
The RB number that the following business dispatched on frame occupies:
(1), the multicast service of the second class group, including TCCH business and TTCH business；
(2), public message, including broadcast, paging, group paging, random access response etc.；
(3), the semi-static business of the voice of group, group here include first kind group and the second class group.
If it is determined that the RB utilization rate for the downlink subframe that specific multicast occupies is greater than first threshold Group_RB_TH, then
Groupolength_new=min { Groupolength_old+1, Groupolength_MAX }, i.e., specific multicast adjusted
The downlink subframe number of occupancy is that the downlink subframe number that the specific multicast before adjustment occupies adds 1, with maximum downstream in the multicast period
The small value of frame number intermediate value.
Wherein: the base station first threshold Group_RB_TH interface can match, and configuration may range from 20%~90%, default
85%, if only 1 group user in measurement period, Group_RB_TH=Group_RB_TH (interface configurations) × 0.875,
Only one group user carries out traffic scheduling even in the current statistic period, then the actual value of first threshold be first threshold with
0.875 product, Groupolength_MAX=Floor (GroupPeriodDLFrameNum ×
GroupFrameRatioMax), the base station GroupFrameRatioMax interface can match, and configure range (20%~100%), default
50%.
Here it provides a kind of specific threshold value configuration and adjustment mode, when specific implementation, is not limited to the reality of occurrence provided
It is existing, it can be adjusted according to practical application.
If RB utilization rate is less than the first preset value of first threshold Group_RB_TH-, Groupolength_new=max
{ Groupolength_old-1, Groupolength_MIN }, i.e., the downlink subframe number that specific multicast adjusted occupies are to adjust
The downlink subframe number that specific multicast before whole occupies subtracts 1, the big value with downlink subframe number intermediate value minimum in the multicast period,
Groupolength_MIN=2.
Wherein, the first preset value such as can be configurable to 20% determine according to actual needs.
It is provided as the proportion of downlink subframe and sub-frame of uplink according to the calculation of existing realization, what is provided in Fig. 1 shows
Example, the number for the downlink subframe that specific multicast occupies are 8, and the number of sub-frame of uplink is 4.It is accounted for for nonspecific multicast
The number of downlink subframe is 4, and the number of sub-frame of uplink is 4.
Finally in conjunction with attached drawing, the cell-level multicast subframe tune based on broadband cluster communication in the embodiment of the present application is described in detail
Spend journey.
Referring to fig. 2, Fig. 2 is that the cell-level multicast subframe scheduling process based on broadband cluster communication is shown in the embodiment of the present application
It is intended to.Specific steps are as follows:
Step 201, if base station determines that current subframe is the downlink subframe that specific multicast occupies, schedules second type group
Multicast service.
For G-RNTI PDSCH data service, mainly group user group service channel (Trunking Traffic
Channel, TTCH)/clustered control channel (Trunking Control Channel, TCCH) channel group service, this Shen
It please be known as multicast service, for C-RNTI PDSCH data service, mainly the program request number of ordinary user DTCH/DCCH channel
According to the application is known as demand (telecommunication) service.
Multicast service includes TCCH business and TTCH business, when the multicast service of schedules second type group, priority scheduling
TCCH business, that is, when existing simultaneously TCCH business and TTCH business, priority scheduling TCCH business, that is to say, that the tune of TCCH business
Degree priority is higher than the priority of TTCH business, also, is directed to the TCCH business and TTCH business of the same group, not same
One TTI is scheduled.
Step 202, if base station determines that current subframe is the downlink subframe that nonspecific multicast occupies, first kind group is dispatched
Multicast service and ordinary user demand (telecommunication) service.
Ordinary user in the embodiment of the present application is opposite with for group user, i.e., terminal is corresponded to group in base station side and used
Family and ordinary user.
When the application implements, also directed to some particular services, i.e. business except multicast service and demand (telecommunication) service, or
Particular service when person in multicast service is handled as follows:
For public message, the public message is dispatched according to the downlink subframe determined for public message, is not distinguished specific
Do not matched by the application when the downlink subframe that the downlink subframe or nonspecific multicast that multicast occupies occupy, i.e. scheduling public message
The limitation for the downlink subframe that the downlink subframe and nonspecific multicast that the specific multicast set occupies occupy, according to existing realization, according to
Protocol rule calculating is sent in which subframe just to be sent in which subframe, and the downlink subframe occupied in specific multicast is such as calculated
Upper transmission is just sent on the downlink subframe that specific multicast occupies；Calculating is sent on the downlink subframe that nonspecific multicast occupies
Just sent on the downlink subframe that nonspecific multicast occupies.
When in the TTCH business in multicast service there are when voice service, if the voice service needs to carry out semi-static to swash
Living, then the voice industry is dispatched on the downlink subframe that the downlink subframe or nonspecific multicast that specific multicast occupies occupy in base station
Business, it can this kind of languages are arbitrarily dispatched on the downlink subframe that downlink subframe or nonspecific multicast that specific multicast occupies occupy
Sound business.
When currently dispatching business, for some special circumstances, it can be occupied in specific multicast and nonspecific multicast
Traffic scheduling is carried out on downlink subframe to seize:
When current downlink subframe is the downlink subframe that specific multicast occupies, if base station determines that the subframe does not have schedules second type
The multicast service of group, and the demand (telecommunication) service to be scheduled such as presence or the multicast service of first kind group, then it is the subframe is interim
It is set as the scheduling that the downlink subframe that nonspecific multicast occupies carries out the multicast service of demand (telecommunication) service or first kind group.
When the downlink subframe that i.e. current nonspecific multicast occupies is not enough, temporarily not used specific multicast is occupied down
Row subframe is set as the subframe that nonspecific multicast occupies and is scheduled；
When there is no etc. demand (telecommunication) service to be scheduled or first kind group multicast service, and be temporarily set as nonspecific group
When broadcasting the unscheduled business of downlink subframe of occupancy, which is re-set as to the downlink subframe of specific multicast occupancy.
When current downlink subframe is the downlink subframe that nonspecific multicast occupies, however, it is determined that the subframe does not dispatch ordinary user
Demand (telecommunication) service or first kind group multicast service, and exist etc. the second class to be scheduled group multicast service, then should
The subframe that subframe is temporarily set as specific multicast occupancy carries out the scheduling of the multicast service of the second class group.
When the downlink subframe that i.e. current specific multicast occupies is not enough, under temporarily not used nonspecific multicast is occupied
The downlink subframe that row subframe is set as specific multicast occupancy is scheduled.
When there is no etc. the second class to be scheduled group multicast service, and be temporarily set as specific multicast occupancy downlink
When the unscheduled business of subframe, which is re-set as the downlink subframe that nonspecific multicast occupies.
In conclusion the application by be pre-configured with specific multicast occupancy downlink subframe position, in the specific of configuration
On the downlink subframe that multicast occupies, the multicast service of schedules second type group；In the downlink that the nonspecific multicast of configuration occupies
The multicast service of first kind group and the demand (telecommunication) service of ordinary user are dispatched in subframe.It can be realized to exist and do not support to receive simultaneously
The scheduling of multicast subframe when the terminal of C-RNTI PDSCH and G-RNTI PDSCH.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (9)
1. a kind of cell-level multicast subframe scheduling method based on broadband cluster communication, which is characterized in that this method comprises:
For any multicast period, the downlink subframe that specific multicast occupies is configured, except the downlink subframe that specific multicast occupies
Downlink subframe is the downlink subframe that nonspecific multicast occupies；
If it is determined that current subframe is the downlink subframe that specific multicast occupies, the then multicast service of schedules second type group；
If it is determined that current subframe is the downlink subframe that nonspecific multicast occupies, then the multicast service of first kind group is dispatched, and
The demand (telecommunication) service of ordinary user；
Wherein, the second class group is that there are the groups that the second Terminal Type receives the group service；First kind group is that there is no the
Two Terminal Types receive the group of the group service；Second Terminal Type is not support in a downlink times interval TTI together
When receive Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI physical layer descending and share channel PDSCH and group's radio network temporary identifier
The terminal of G-RNTI PDSCH.
2. the method according to claim 1, wherein the downlink subframe that the configuration multicast occupies includes:
In a multicast period, what the initial position and specific multicast for configuring the downlink subframe that specific multicast occupies occupied
The downlink subframe number of downlink subframe.
3. according to the method described in claim 2, it is characterized in that, the method further includes:
Period counts the resource block RB utilization rate for the downlink subframe that specific multicast occupies；
If it is determined that the RB utilization rate for the downlink subframe that specific multicast occupies is greater than first threshold, then specific multicast adjusted occupies
Downlink subframe number be adjustment before specific multicast occupy downlink subframe number add 1, with maximum downstream number of sub frames in the multicast period
The small value of intermediate value；
If RB utilization rate is less than the difference of first threshold and the first preset value, the downlink subframe that specific multicast adjusted occupies
Number subtracts 1 for the downlink subframe number that the multicast before adjustment occupies, the big value with downlink subframe number intermediate value minimum in the multicast period.
4. according to the method described in claim 3, it is characterized in that,
The RB utilization rate for the downlink subframe that the specific multicast occupies is the RB number that the downlink subframe that specific multicast occupies uses, with
The ratio of the total RB number for the downlink subframe that specific multicast occupies；
Wherein, the RB number that the downlink subframe that specific multicast occupies in measurement period uses includes on the downlink subframe of specific multicast
The RB number that the business of scheduling occupies；
The business dispatched on the downlink subframe of specific multicast includes: multicast service, public message and the group of the second class group
The semi-static business of voice.
5. the method according to claim 1, wherein the multicast service includes: clustered control channel TCCH industry
Business and group service channel TTCH business；
When the multicast service of schedules second type group, priority scheduling TCCH business,
For the TCCH business and TTCH business of the same group, it is not scheduled in the same TTI.
6. the method according to claim 1, wherein the method further includes:
When dispatching public message, the public message is dispatched according to the downlink subframe calculated for public message.
7. the method according to weighing and require 1, which is characterized in that the described method includes:
When in the TTCH business in multicast service there are when voice service, if the voice service needs to carry out semi-static activation,
The voice service is dispatched on the downlink subframe that downlink subframe or nonspecific multicast that specific multicast occupies occupy.
8. method according to claim 1-7, which is characterized in that described to further comprise:
When current downlink subframe is the downlink subframe that specific multicast occupies, however, it is determined that the subframe does not have the group of schedules second type group
Business, and the demand (telecommunication) service to be scheduled such as presence or the multicast service of first kind group are broadcast, then is temporarily set as the subframe non-
The downlink subframe that specific multicast occupies carries out the scheduling of the multicast service of demand (telecommunication) service or first kind group；
When there is no etc. demand (telecommunication) service to be scheduled or first kind group multicast service, and be temporarily set as nonspecific multicast and account for
When the unscheduled business of downlink subframe, which is re-set as to the downlink subframe of specific multicast occupancy.
9. method according to claim 1-7, which is characterized in that the method further includes: current downlink
When subframe is the downlink subframe that nonspecific multicast occupies, however, it is determined that the subframe does not dispatch the demand (telecommunication) service or first of ordinary user
The multicast service of class group, and the multicast service of the second class to be scheduled group such as presence, then be temporarily set as spy for the subframe
Determine the scheduling of the multicast service of the second class group of subframe progress of multicast occupancy；
When there is no etc. the second class to be scheduled group multicast service, and be temporarily set as specific multicast occupancy downlink subframe
When unscheduled business, which is re-set as the downlink subframe that nonspecific multicast occupies.
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