CN105337711A - Transmission method of single-cell point-to-multipoint transmission system - Google Patents
Transmission method of single-cell point-to-multipoint transmission system Download PDFInfo
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- CN105337711A CN105337711A CN201510614513.6A CN201510614513A CN105337711A CN 105337711 A CN105337711 A CN 105337711A CN 201510614513 A CN201510614513 A CN 201510614513A CN 105337711 A CN105337711 A CN 105337711A
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- mbms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
Abstract
The invention provides a transmission method of a single-cell point-to-multipoint transmission system. The method is characterized by determining whether to active uplink feedback transmission according to the number of UE correlative with MBMS service and the number of UE in connected states; indicating whether the UE transmits uplink feedback by adding uplink feedback indication in the control channel of SC-PTM; in view of a resource conflict problem generated when UE transmits a PUCCH, setting a rule that the UE transmits NACK only when the PDSCH is erroneously analyzed but does not transmit the NACK when the PDSCH is correctly analyzed. Accordingly, the method may solve the resource conflict problem when multiple pieces of UE transmits the PUCCH and achieves a purpose of retransmitting the PDSCH so as to increase SC-PTM transmission efficiency and prevent a waste of wireless resources.
Description
Technical field
The present invention relates to wireless communication system technologies field, particularly relate to the transmission method of a kind of single cell point to multicast system.
Background technology
In order to LTE(LongTimeEvolution, Long Term Evolution) be applied in emergency communication, 3GPP(TheThirdGenerationpartnershipProject, third generation affiliate) in Rel-12, introduce trunked communication system (GroupCommunicationSystemEnabler, GCSE) based on LTE.In the GCSE of Rel-12, trunking communication is based on eMBMS(enhanceMultimediaBroadcastMultimediaMulticast, strengthen multimedia broadcast multicast) design, at one, eMBMS plans that content of multimedia is thrown in MBSFN region, region (Multicast/BroadcastoverSingleFrequencyNetwork single frequency network multicast broadcast) in advance, such as move TV, but MBSFN region is static, by OAM(OperationandMaintenance, Operation and Maintenance) configuration, can not change dynamically according to user distribution.EMBMS takies the whole system bandwidth of a subframe, even without being finished all resources, does not also allow in a subframe multiplexing with clean culture.MBSFN sub-frame configuration is also by OAM static configuration, and most polygamy 6 MBSFN sub-frame in a radio frames, can not carry out dynamic conditioning according to the number of the business of this group user and this group user.When providing emergency communication to serve, inevitably waste to the Radio Resource of eMBMS configuration.Therefore effectively strengthen to solve resource, 3GPP proposes single community SC-PTM(Single-Cellpoint-to-multipoint, and single cell point is to multiple spot) transmission.
3GPP research and utilization downlink business shared channel PDSCH(PhysicalDownlinkshareChannel, Physical Downlink Shared Channel) at empty port load-supporting multicast broadcast data, flexibly Resourse Distribute and and unicast data multiplexing in same subframe, solve tradition and transmit the radio resource efficiency problem of Multimedia Broadcast Multicast Service by MBSFN.Because single community SC-PTM transmission is mainly used in emergency communication and public safety scene, the efficiency of transmission of data is most important, therefore in conjunction with the HARQ(HybridAutomaticRepeatRequest of current clean culture, hybrid automatic repeat-request) HARQ of retransmission mechanism research SC-PTM retransmits highly significant.
Summary of the invention
In order to solve prior art Problems existing, the present invention proposes the transmission method of a kind of single cell point to multicast system, only NACK is sent when separating wrong PDSCH when achieving UE uplink feedback, and solution is to not sending this rule of ACK during PDSCH, resource conflict problem during multiple UE transmission PUCCH can be solved, the object retransmitting PDSCH can be reached, the efficiency of transmission of single cell point to multicast system can be improved, avoid the waste of Radio Resource.
The technical solution used in the present invention particular content is as follows:
Single cell point, to a transmission method for multicast system, comprising:
Base station side:
Base station is designated as UeNum_MBMS by the UE number that core net obtains and MBMS is associated;
Base station increase inside SC-MCCH Counting requests message MBMSCountingRequest, uplink feedback instruction UL_Feedback and and the UE number UeNum_MBMS that is associated of MBMS;
Base station periodically sends SC-PTM control channel SC-MCCH;
MBMSCountingResponse is receiveed the response to the UE the being in connected state counting number receiving this MBMS by the counting that UE feeds back in base station, is designated as UeNum_Connect;
Base station compares decision with the threshold value of its correspondence respectively according to described UeNum_MBMS and UeNum_Connect and whether opens uplink feedback, if the threshold value that the threshold value of UeNum_MBMS is UeNum_Th, UeNum_Connect is UeNumConnect_Th; If UeNum_MBMS does not exceed its threshold value UeNum_Th, it is Ture that base station arranges UL_Feedback in SC-MCCH; If UeNum_MBMS exceedes its threshold value UeNum_Th, if but connected state UE number UeNum_Connect does not exceed its threshold value UeNumConnect_Th, and it is Ture that base station arranges UL_Feedback in SC-MCCH; If UeNum_MBMS exceedes its threshold value UeNum_Th, connected state UE number UeNum_Connect also exceedes its threshold value UeNum_Connect, then base station arranges UL_Feedback in SC-MCCH is False;
UE side:
UE receives SC-MCCH and obtains Counting requests message MBMSCountingRequest, UL_Feedback and UeNum_MBMS;
UE feedback count receives the response MBMSCountingResponse to base station;
If UE detects that UL_Feedback is Ture, and UeNum_MBMS does not exceed its threshold value UeNum_Th, if UE is in connected state simultaneously, then receive PDSCH situation according to UE and send uplink feedback, if separate wrong, then send NACK, if it is right to separate, then do not send feedback; If UE is in Idle state, then initiate RRC connection request, set up RRC and connect, send uplink feedback according to reception PDSCH situation, if separate wrong, then send NACK, if separate right, then do not send feedback; If UE detects that UL_Feedback is Ture, and UeNum_MBMS exceedes its threshold value UeNum_Th, if UE is in connected state, then receives PDSCH situation according to UE and send uplink feedback, if separate wrong, then send NACK, if separate right, then do not send feedback; If UE is in Idle state, receives PDSCH, do not do RRC connection establishment; If UE detects that UL_Feedback is False, then directly receive PDSCH.
Beneficial effect:
A kind of single cell point of the present invention is to the transmission method of multicast system, according to the UE number relevant with MBMS and be in connected state UE number judge whether open uplink feedback transmission, UE is indicated whether to send uplink feedback by increasing uplink feedback instruction inside the control channel of SC-PTM, the resource conflict problem produced when sending PUCCH for UE, only NACK is sent when separating wrong PDSCH during setting UE uplink feedback, and solution is to not sending this rule of ACK during PDSCH, resource conflict problem during multiple UE transmission PUCCH can be solved, the object retransmitting PDSCH can be reached, thus improve the efficiency of SC-PTM transmission, avoid the waste of Radio Resource.
Accompanying drawing explanation
The transmitting procedure flow chart of a kind of SC-PTM transmission system that Fig. 1 provides for the embodiment of the present invention.
The base station side process chart of a kind of SC-PTM transmission system that Fig. 2 provides for the embodiment of the present invention.
The UE side process chart of a kind of SC-PTM transmission system that Fig. 3 provides for the embodiment of the present invention.
Keyword:
SC-PTM:Single-Cellpoint-to-multipoint single cell point is to multiple spot
3GPP:TheThirdGenerationpartnershipProject third generation affiliate
LTE:LongTimeEvolution Long Term Evolution
MBMS:MultimediaBroadcastMultimediaMulticast multimedia broadcast multicast
EMBMS:enhanceMultimediaBroadcastMultimediaMulticast strengthens multimedia broadcast multicast
GCSE:GroupCommunicationSystemEnabler trunked communication system
OAM:OperationandMaintenance Operation and Maintenance
MBSFN:Multicast/BroadcastoverSingleFrequencyNetwork single frequency network multicast broadcast
RAN:RadioAccessNetwork wireless access network
RNTI:RadioNetworkTempIdentity Radio Network Temporary Identifier
PDCCH:PhysicalDownlinkControlChannel Physical Downlink Control Channel
PUCCH:PhysicalUplinkControlChannel Physical Uplink Control Channel
PDSCH:PhysicalDownlinkshareChannel Physical Downlink Shared Channel
MCCH:MulticastControlChannel multicast control channel
MCE:MulticastCoordinationentity multicast coordination entity
UE:UserEquipment user terminal
HARQ:HybridAutomaticRepeatRequest hybrid automatic repeat-request
CSI:ChannelStateinformation channel condition information
RRC:RadioResourceControl wireless heterogeneous networks.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As Figure 1-3, a kind of single cell point of the present invention, to the transmission method of multicast system, comprises base station side and transmits UE side two parts two parts flow process altogether of data with base station side.
Base station side:
Base station is by the UE number UeNum_MBMS that core net obtains and MBMS is associated.The UE be associated with MBMS comprise to receive a certain MBMS UE or to the interested UE of this MBMS;
Base station increase inside SC-MCCH Counting requests message MBMSCountingRequest, uplink feedback instruction UL_Feedback and and the UE number UeNum_MBMS that is associated of a certain MBMS;
Base station periodically sends SC-PTM control channel SC-MCCH;
MBMSCountingResponse is receiveed the response to the UE the being in connected state counting number receiving this MBMS by the counting that UE feeds back in base station, is designated as UeNum_Connect;
Base station side compares decision with the threshold value of its correspondence respectively according to described UeNum_MBMS and UeNum_Connect and whether opens uplink feedback, if the threshold value that the threshold value of UeNum_MBMS is UeNum_Th, UeNum_Connect is UeNumConnect_Th; If UeNum_MBMS does not exceed its threshold value UeNum_Th, it is Ture that base station arranges UL_Feedback in SC-MCCH; If UeNum_MBMS exceedes its threshold value UeNum_Th, if but connected state UE number UeNum_Connect does not exceed its threshold value UeNumConnect_Th, and it is Ture that base station arranges UL_Feedback in SC-MCCH; If UeNum_MBMS exceedes its threshold value UeNum_Th, connected state UE number UeNum_Connect also exceedes its threshold value UeNum_Connect, then base station arranges UL_Feedback in SC-MCCH is False;
UE side:
UE receives SC-MCCH and obtains Counting requests message MBMSCountingRequest, UL_Feedback and UeNum_MBMS;
UE feedback count receives the response MBMSCountingResponse to base station;
If UE detects that UL_Feedback is Ture, and UeNum_MBMS does not exceed its threshold value UeNum_Th, if UE is in connected state simultaneously, then receive PDSCH situation according to UE and send uplink feedback, if separate wrong, then send NACK, if it is right to separate, then do not send feedback; If UE is in Idle state, then initiate RRC connection request, set up RRC and connect, send uplink feedback according to reception PDSCH situation, if separate wrong, then send NACK, if separate right, then do not send feedback; If UE detects that UL_Feedback is Ture, and UeNum_MBMS exceedes its threshold value UeNum_Th, if UE is in connected state, then receives PDSCH situation according to UE and send uplink feedback, if separate wrong, then send NACK, if separate right, then do not send feedback; If UE is in Idle state, receives PDSCH, do not do RRC connection establishment; If UE detects that UL_Feedback is False, then directly receive PDSCH.
In sum, only feed back during UE uplink feedback separate wrong PDSCH time situation, namely when separate wrong PDSCH time feedback NACK, this can solve multiple UE send PUCCH time resource conflict problem.
As shown in Figure 1, in FIG, eNB represents base station, and MCE represents multiple-instance user network edge device, and UE represents user terminal.Network side overall procedure is as follows:
1) colony communication server is registered to server the UE be associated with a certain MBMS, and by being UeNum_MBMS with the UE number that a certain MBMS is associated and this information definition of corresponding community, then putting UeNum_MBMS into MBMS session start message and passing to base station by M3 and M2 interface.
2) base station increases Counting requests message MBMSCountingRequest, uplink feedback instruction UL_Feedback and UeNum_MBMS inside SC-MCCH message.
3) base station periodically sends SC-PTM control channel SC-MCCH.
4) base station is receiving the UE number being in connected state of this MBMS by the counting that UE feeds back MBMSCountingResponse counting of receiveing the response, and defining this number is UeNum_Connect.
5) base station compares decision with the threshold value of its correspondence respectively according to described UeNum_MBMS and UeNum_Connect and whether opens uplink feedback, if the threshold value that the threshold value of UeNum_MBMS is UeNum_Th, UeNum_Connect is UeNumConnect_Th; If UeNum_MBMS does not exceed its threshold value UeNum_Th, it is Ture that base station arranges UL_Feedback in SC-MCCH; If UeNum_MBMS exceedes its threshold value UeNum_Th, if but connected state UE number UeNum_Connect does not exceed its threshold value UeNumConnect_Th, and it is Ture that base station arranges UL_Feedback in SC-MCCH; If UeNum_MBMS exceedes its threshold value UeNum_Th, connected state UE number UeNum_Connect also exceedes its threshold value UeNum_Connect, then base station arranges UL_Feedback in SC-MCCH is False.
UE side overall procedure:
1) UE receives SC-MCCH and obtains Counting requests message MBMSCountingRequest, UL_Feedback and UeNum_MBMS.
2) UE feedback count receives the response MBMSCountingResponse to base station.
3) if UE detects that UL_Feedback is Ture, and UeNum_MBMS does not exceed its threshold value UeNum_Th, if UE is in connected state simultaneously, then receive PDSCH situation according to UE and send uplink feedback, if separate wrong, then send NACK, if it is right to separate, then do not send feedback; If UE is in Idle state, then initiate RRC connection request, set up RRC and connect, send uplink feedback according to reception PDSCH situation, if separate wrong, then send NACK, if separate right, then do not send feedback; If UE detects that ULFeedback is Ture, and UeNum_MBMS exceedes its threshold value UeNum_Th, if UE is in connected state, then receives PDSCH situation according to UE and send uplink feedback, if separate wrong, then send NACK, if separate right, then do not send feedback; If UE is in Idle state, receives PDSCH, do not do RRC connection establishment; If UE detects that UL_Feedback is False, then directly receive PDSCH.
A kind of single cell point of the present invention is to the transmission method of multicast system, according to the UE number relevant with MBMS and be in connected state UE number judge whether open uplink feedback transmission, UE is indicated whether to send uplink feedback by increasing uplink feedback instruction inside the control channel of SC-PTM, the resource conflict problem produced when sending PUCCH for UE, only NACK is sent when separating wrong PDSCH during setting UE uplink feedback, and solution is to not sending this rule of ACK during PDSCH, resource conflict problem during multiple UE transmission PUCCH can be solved, the object retransmitting PDSCH can be reached, thus improve the efficiency of SC-PTM transmission, avoid the waste of Radio Resource.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (1)
1. single cell point is to a transmission method for multicast system, it is characterized in that, comprising:
Base station side:
Base station is designated as UeNum_MBMS by the UE number that core net obtains and MBMS is associated;
Base station increase inside SC-MCCH Counting requests message MBMSCountingRequest, uplink feedback instruction UL_Feedback and and the UE number UeNum_MBMS that is associated of MBMS;
Base station periodically sends SC-PTM control channel SC-MCCH;
MBMSCountingResponse is receiveed the response to the UE the being in connected state counting number receiving this MBMS by the counting that UE feeds back in base station, is designated as UeNum_Connect;
Base station compares decision with the threshold value of its correspondence respectively according to described UeNum_MBMS and UeNum_Connect and whether opens uplink feedback, if the threshold value that the threshold value of UeNum_MBMS is UeNum_Th, UeNum_Connect is UeNumConnect_Th; If UeNum_MBMS does not exceed its threshold value UeNum_Th, it is Ture that base station arranges UL_Feedback in SC-MCCH; If UeNum_MBMS exceedes its threshold value UeNum_Th, if but connected state UE number UeNum_Connect does not exceed its threshold value UeNumConnect_Th, and it is Ture that base station arranges UL_Feedback in SC-MCCH; If UeNum_MBMS exceedes its threshold value UeNum_Th, connected state UE number UeNum_Connect also exceedes its threshold value UeNum_Connect, then base station arranges UL_Feedback in SC-MCCH is False;
UE side:
UE receives SC-MCCH and obtains Counting requests message MBMSCountingRequest, UL_Feedback and UeNum_MBMS;
UE feedback count receives the response MBMSCountingResponse to base station;
If UE detects that UL_Feedback is Ture, and UeNum_MBMS does not exceed its threshold value UeNum_Th, if UE is in connected state simultaneously, then receive PDSCH situation according to UE and send uplink feedback, if separate wrong, then send NACK, if it is right to separate, then do not send feedback; If UE is in Idle state, then initiate RRC connection request, set up RRC and connect, send uplink feedback according to reception PDSCH situation, if separate wrong, then send NACK, if separate right, then do not send feedback; If UE detects that UL_Feedback is Ture, and UeNum_MBMS exceedes its threshold value UeNum_Th, if UE is in connected state, then receives PDSCH situation according to UE and send uplink feedback, if separate wrong, then send NACK, if separate right, then do not send feedback; If UE is in Idle state, receives PDSCH, do not do RRC connection establishment; If UE detects that UL_Feedback is False, then directly receive PDSCH.
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| CN107889064A (en) * | 2016-09-29 | 2018-04-06 | 成都鼎桥通信技术有限公司 | MBMS recovers method of reseptance and device |
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| CN110036671A (en) * | 2016-12-12 | 2019-07-19 | 高通股份有限公司 | The technology and equipment of power-efficient alignment for CDRX and SC-PTM DRX scheduling |
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| WO2021142722A1 (en) * | 2020-01-16 | 2021-07-22 | Oppo广东移动通信有限公司 | Ethernet frame transmission and reception methods, device, apparatus, and medium |
| WO2021238991A1 (en) * | 2020-05-28 | 2021-12-02 | FG Innovation Company Limited | Wireless communication method and user equipment for ul feedback |
| WO2022027669A1 (en) * | 2020-08-07 | 2022-02-10 | Oppo广东移动通信有限公司 | Method for transmitting feedback information, terminal device, and network device |
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