Background technology
Trunked communication system is with half-duplex mode communication, and (channel utilization is high for Push To Talk, PTT) the obtaining and discharge of key control channel, and call proceeding is fast through PoC during work; The user shares down channel in the group, and resource utilization is high.And trunked communication system can guarantee the privacy and the fail safe of conversation through voice encryption; Be high-priority users or professional priority allocation channel; Guarantee the communication under the state of emergency through fail soft function; Realize multi-level flexibly packet scheduling command function through dynamic reorganization.
Current trunked communication system develops into the broadband trunked communication system stage, relies on state-of-the-art Radio Transmission Technology, like the LTE technology, can realize the leap of trunked communication system each item function and technology.The broadband trunked communication system has the characteristic that the supporting business type is diversified, transmission means is diversified, bandwidth is big, transmission rate is high.The business of supporting comprises voice, data, video etc.; Transmission means comprises clean culture, group calling, multicast etc., and wherein full duplex mode work is adopted in clean culture, and group calling and multicast adopt half-duplex mode work.
The performance characteristic of broadband trunked communication system is: network reliability is high, has strong fail soft and capability to resist destruction; Support the Bulk Call ability of big hot zones, focus period; Call set-up time is short, and the single system call set-up time is less than 500 milliseconds (ms); Internet security is high, supports End to End Encryption; Wide coverage, the networking expense is low.Wherein, call set-up time, network reliability and fail safe are most important three technical indicators.
In group calling and multicast transmission; Because identical data are sent to one group of user in the base station on identical resource; Each user has nothing in common with each other with respect to the characteristic of channel of base station, and the base station can only adopt bigger power omnidirectional signalling of bouquet transmission to satisfy all users' in the group demand.The problem of bringing thus is very big to the interference of co-frequency neighbor cell.
In addition, to group calling and multicast packet that the user of a group sends, because insensitive to channel variation, the dynamic dispatching gain is little, and can consume the resource of carrying dispatch, and is more reasonable with static relatively resource distribution mode.
In trunked communication system, a UE can be subordinated to a plurality of groups, but the same time can only be participated in transfer of data in a group.Semiduplex mode is adopted in cluster transmission, and words power side UE sends data, and when promptly carrying out uplink, called UE can only be in accepting state, promptly can only downlink data receiving and can not send upstream data.In addition, the cluster transmission also has can only have a kind of professional existence simultaneously in the group, do not have the multiplexing characteristics of multiple business, and said here business is meant concrete form of service, like voice, video etc.
From the angle of network side, can there be a plurality of groups transmission simultaneously, each group all has specific member UE to participate in the group service transmission and receives.In group of synchronization a calling party and some callees can only be arranged.
Several kinds of channels below in group system, introducing:
Logic channel:
T-MCCH:Trunking Multicast Control Channel, the cluster multicast control channel.The transmission trunking control information of multicast comprises T-MTCH schedule information, business information, group information etc.Article one, T-MCCH carries the control information or the schedule information of a plurality of groups.Article one, T-MCCH can only (Multicast Broadcast Single Frequency Network, MBSFN) zone be corresponding with a multicast single-frequency network.
T-MTCH:Trunking Multicast Traffic Channel, cluster multicast service channel.The transmission trunking business datum, a T-MTCH only carries the data of a service bearer.
Transmission channel:
T-MCH:Trunking Multicast Channel, the cluster Multicast Channel.Broadcasting cluster control information transmission and data.
Physical channel:
PTMCH:Physical Trunking Multicast Channel, the physical cluster Multicast Channel.Bearing cluster command transmitting and data.
More than the mapping relations of several kinds of channels as shown in Figure 1.
Rule shown in Figure 2 is adopted in the cluster transmission:
Pre-configured T-MCCH resource cycle and subframe position, actual T-MCCH is transmitted on the predefine resource location and carries out;
T-MCCH comprises the control information of one or more groups and configuration, the schedule information of T-MTCH;
The transmission of T-MTCH is carried out with other dispatching commands based on the scheduling of T-MCCH;
The actual transmissions of T-MCCH can be by Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) dispatching command indication;
T-MCCH can periodically retransmit, and retransmits also can be dispatched by PDCCH.
Because UE belongs to different groups, the information of the just affiliated group of concern if all T-MCCH read, will increase the UE power consumption greatly.Informing mechanism in the LTE MBMS technology is used to notify the change of the corresponding MCCH in MBSFN zone, and the cycle is very long, is not suitable for the cluster transmission system.
In sum, if do not limit, UE will receive and read T-MCCH at each T-MCCH predefine resource location.T-MCCH is mapped to T-MCH and then is mapped to PTMCH, is organized into medium access control (Media Access Control, MAC) Packet Data Unit (Packet Data Unit, PDU) middle transmission.The expense that UE reads T-MCCH is very big, cause UE power consumption to increase, and because the T-MCCH predefine cycle is very little, UE power consumption problem is more outstanding.(Multimedia Broadcast/Multicast Service, MBMS) informing mechanism in the technology is used to notify the change of the corresponding MCCH in MBSFN zone to the LTE multimedia broadcast/multicast service, can not directly apply to the cluster transmission system.
Embodiment
The embodiment of the invention provides a kind of cluster transmission notice, processing method and device; Use so that subscriber equipment only needs to receive the cluster control channel of affiliated group after receiving the PDCCH dispatching command; Need not receive the cluster control channel of other groups, greatly reduce the power consumption of subscriber equipment and the complexity of processing.
The technical scheme that the embodiment of the invention provides; Solve UE and how to receive the trunking signal of affiliated group and the problem of dispatching command; Make in the information of the affiliated group of the correct reception of UE; Need not carry out other unnecessary data and receive, for example need not receive the information of other groups, thereby reach the effect of power saving.
Below in conjunction with accompanying drawing the technical scheme that the embodiment of the invention provides is described.
At network side, referring to Fig. 3, a kind of cluster transmission notice method that the embodiment of the invention provides comprises step:
The sign of the group under S101, the definite cluster control channel that is about to transmit;
S102, to user equipment (UE) signalling of bouquet control channel notification message, wherein carry the sign of the group under the cluster control channel that is about to transmission.
Preferably, said cluster control channel notification message is carried by physical downlink control channel PDCCH.
Preferably, said PDCCH adopts the fixing Radio Network Temporary Identifier RNTI of group scrambling.
Preferably, the corresponding one or more group identifications of each bit among the said PDCCH.
Preferably, this method also comprises:
With the corresponding relation of PDCCH bit position and group identification in the said cluster control channel notification message, notify to UE through the system message that evolved base station eNB sends.
Preferably, this method also comprises:
With the transmission number of times of said cluster control channel notification message, notify to UE through the system message that evolved base station eNB sends.
Preferably, said cluster control channel notification message sends to UE on previous or a plurality of continuous subframes of the transmission subframe of cluster control channel.
Preferably, said cluster control channel notification message sends to UE on the pre-configured resource of cluster control channel notification message;
Wherein, the position of the pre-configured resource of said cluster control channel notification message is corresponding one by one with the position of the pre-configured resource of cluster control channel.
Preferably, the position of the pre-configured resource of said cluster control channel notification message is positioned at the previous subframe of position of the pre-configured resource of cluster control channel;
Perhaps, the position of the pre-configured resource of said cluster control channel notification message, the position with the pre-configured resource of cluster control channel is positioned at same subframe.
Preferably, the pre-configured resource of said cluster control channel notification message is notified to UE through system message by eNB;
Perhaps, said cluster control channel notification message sends to UE on the pre-configured resource of cluster control channel.
Correspondingly, in the UE side, referring to Fig. 4, a kind of cluster method for transmission processing that the embodiment of the invention provides comprises step:
S201, receive the cluster control channel notification message that network side sends, therefrom obtain the sign of the group under the cluster control channel that network side is about to transmission;
S202, according to said sign, the cluster control channel transmission of group if having, then receives the cluster control channel under judging whether, otherwise, do not carry out the reception of cluster control channel.
Preferably, said cluster control channel notification message is carried by physical downlink control channel PDCCH.
Preferably, said PDCCH adopts the fixing Radio Network Temporary Identifier RNTI of group scrambling.
Preferably, the corresponding one or more group identifications of each bit among the said PDCCH.
Preferably, this method also comprises:
Through the system message that evolved base station eNB sends, obtain the corresponding relation of PDCCH bit position and group identification in the said cluster control channel notification message.
Preferably, this method also comprises:
Through the system message that evolved base station eNB sends, obtain the transmission number of times of said cluster control channel notification message.
Preferably, the previous or a plurality of continuous subframes in the transmission subframe of cluster control channel receive said cluster control channel notification message.
Preferably, on the pre-configured resource of cluster control channel notification message, receive said cluster control channel notification message;
Wherein, the position of the pre-configured resource of said cluster control channel notification message is corresponding one by one with the position of the pre-configured resource of cluster control channel.
Preferably, the position of the pre-configured resource of said cluster control channel notification message is positioned at the previous subframe of position of the pre-configured resource of cluster control channel;
Perhaps, the position of the pre-configured resource of said cluster control channel notification message, the position with the pre-configured resource of cluster control channel is positioned at same subframe.
Preferably, according to the system message that eNB sends, confirm the pre-configured resource of said cluster control channel notification message;
Perhaps, on the pre-configured resource of cluster control channel, receive said cluster control channel notification message.
Provide concrete explaining below.
The embodiment of the invention is introduced cluster control channel informing mechanism, is used to notify the group attribute of the cluster control channel that is about to transmission, specifically comprises following 3 points:
One, base station structure cluster control channel notification message (abbreviation notification message); The corresponding one or more groups of wherein every bit; And with the corresponding relation of the group identification of every bit and group in notification message notice usefulness+family equipment, the position of notification of user equipment message transmission resource can also be indicated in the base station simultaneously;
Two, the base station receives higher layer entities, as the MBMS coordination entity (MBMS Coordination Entity, MCE), behind the cluster control channel of transmission, which group the cluster control channel that be about to send with the notification message notifying user equipment belongs to;
Three, subscriber equipment receiving notice message, the transmission of the cluster control channel of group if having, then receives the cluster control channel under judging whether, if do not have, does not carry out the cluster control channel and receives.
Introduce as follows in detail about above-mentioned first:
The base station is before scheduling of cluster control channel and transmission; To notification message be sent sub-frame configuration (the PDCCH dispatching command of promptly dispatching the cluster control channel sends the position) and Downlink Control Information (Downlink Control Information; DCI) the corresponding relation notifying user equipment of bit (bit) and group identification, advice method generally adopts system information, is convenient to all subscriber equipmenies and knows; This system information can be system information block (System Information Block, SIB) 13.
Notification message sends sub-frame configuration: notification message sends at pre-configured resource location; Have pre-configured resource cycle and pre-configured subframe position; With cluster control channel T-MCCH send pre-configured resource matched, a pre-configured resource location of T-MCCH is promptly arranged behind each notification message resource location.If the pre-configured resource of notification message is positioned at same subframe with the pre-configured resource of cluster control channel, then can not introduce independent configuration, on the pre-configured resource of each cluster control channel, sending a notification message gets final product.
In order to guarantee the reliable transmission of notification message, a kind of enhancing is repeatedly to repeat to send the PDCCH that carries notification message continuously.
A kind of example of base station notifying user equipment notification message configuration is following:
MBMS notifies configuration information unit (MBMS-Notification Config information element) as follows:
Wherein,
The configuration of the corresponding relation of subframe and group identification is introduced as follows in the notification message:
The base station is with the dispatching command PDCCH bearing cluster control channel notification message of scheduling cluster control channel transmission; The content that comprises among the PDCCH is called DCI; With 3GPP LTE DCI 1C form is example, and wherein information bit is more than or equal to 8, and is as shown in the table with the corresponding relation of group identification:
The base station is in the notification message that subscriber equipment sends, and the message format of the corresponding relation of every bit and group identification is as follows:
Wherein,
Specify as follows about above-mentioned second:
Base station side: a nearest notice subframe is sent the position and is sent the PDCCH dispatching command before signalling of bouquet control channel time point; This PDCCH dispatching command is with fixing group's Radio Network Temporary Identifier (Radio Network Temporary Identity, RNTI) scrambling.The corresponding group of indication subsequent set group control channel in the dispatching command, if the transmission of corresponding group is arranged, the corresponding bit position is 1 among the PDCCH, otherwise is changed to 0.The cluster control channel predefine resource location signalling of bouquet control channel transmission of base station after having sent the PDCCH dispatching command, notice subframe and T-MCCH predefine subframe can be same subframe.
Thirdly specify as follows about above-mentioned:
User equipment side: send the resource location of subframe at the notification message of base station configuration, read the PDCCH of the RNTI of group scrambling,, then represent the follow-up cluster control channel transmission that do not have if do not have; If read the PDCCH of cluster RNTI scrambling, whether the corresponding indication bit of group is changed to 1 under the inspection, if be changed to 1, read follow-up cluster control channel transmission, otherwise does not carry out subsequent operation.
Embodiment one:
Referring to Fig. 5, notification message disposes and reshuffles flow process and comprises:
The eNB side:
S301, eNB transmitting system information SIB1 give UE, comprising the schedule information of SIB13.
S302, eNB transmitting system information SIB2 give UE, comprising MBSFN subframe basic configuration, can only carry out in the subframe in the set of MBSFN sub-frame configuration with the cluster transmission that broadcast mode carries out.
S303, eNB send SIB13 and give UE, and SIB13 is used for the transmission cycle and the corresponding relation that sends sub-frame configuration, PDCCH bit and group identification of configuration notification message, and the pre-configured resource of T-MCCH and transmission cycle;
S304, eNB send beep-page message and give UE, reporting system information-change;
S305, eNB send the SIB1 that upgrades and give UE, wherein carry the SIB13 schedule information;
S306, eNB send the SIB13 that upgrades and give UE, wherein carry the notification message reconfiguration information, and the content of reshuffling possibly be that notification message sends the position of subframe or the corresponding relation of PDCCH bit and group identification.
Correspondingly, in the UE side:
Step 1 (T1): UE receives SIB1, obtains the SIB13 schedule information;
Step 2 (T2): UE receives SIB2, obtains the MBSFN subframe configuration information;
Step 3 (T3): UE receives SIB13; Obtain the transmission cycle of notification message and the corresponding relation of subframe, PDCCH bit and group identification; And the pre-configured resource of T-MCCH and transmission cycle, and carry out the reception of notification message and cluster control channel according to these information;
Step 4 (T4): UE paging receiving message, obtain the system information Notification of Changes;
Step 5 (T5): UE receives the SIB1 that upgrades, and obtains the SIB13 schedule information;
Step 6 (T6): UE receives the SIB13 that upgrades, and obtains the configuration of notification message and cluster control channel, schedule information, according to configuration information receiving notice message that upgrades and the transmission of cluster control channel.
Embodiment two:
Referring to Fig. 6, scheduling of cluster control channel and transfer process comprise:
The prerequisite hypothesis: UE1 is subordinated to group 1, and UE2 is subordinated to group 2; The corresponding group of PDCCH bit1 1 sign, the corresponding group of PDCCH bit2 2 signs.
The eNB side:
The PDCCH of S401:eNB signalling of bouquet RNTI scrambling gives UE; Wherein carry cluster control channel communication notification messages; PDCCH bit1 was changed to for 1 (representing the follow-up cluster control channel transmission that group 1 is arranged); PDCCH bit2 was changed to for 0 (representing the follow-up cluster control channel transmission that does not have group 2), and according to the transmission cycle and the transmission number of times of base station configuration, this PDCCH message can be sent continuously once or sent repeatedly continuously;
S402:eNB sends the cluster control channel of group 1 on pre-configured cluster control channel resource subsequently, and sends the cluster transfer of data of group 1 thereupon;
The PDCCH of S403:eNB signalling of bouquet RNTI scrambling wherein carries cluster control channel communication notification messages, and PDCCH bit1 is changed to 0, and PDCCH bit2 is changed to 1, and according to base station configuration, this PDCCH message can be sent continuously once or sent repeatedly continuously;
S404:eNB sends the cluster control channel of group 2 on pre-configured cluster control channel resource subsequently, and sends the cluster transfer of data of group 2 thereupon.
The UE side:
UE1:
Step 1 (T1): UE1 sends the PDCCH that detects cluster RNTI scrambling on the subframe at the notification message of configuration, if detect notification message PDCCH, and then the detection notice message content, confirm that PDCCH bit1 is changed to 1;
Step 2 (T2): UE1 receives the transmission of cluster control channel on the pre-configured resource of cluster control channel, and receives follow-up cluster transfer of data;
Step 3 (T3): UE1 sends the PDCCH that detects cluster RNTI scrambling on the subframe at the notification message of configuration, if detect notification message PDCCH, and then the detection notice message content, confirm that PDCCH bit1 is changed to 0;
Step 4 (T4): UE1 does not receive the transfer of data on the pre-configured resource of cluster control channel.
UE2:
Step 1 (T1): UE2 sends the PDCCH that detects cluster RNTI scrambling on the subframe at the notification message of configuration, if detect notification message PDCCH, and then the detection notice message content, confirm that PDCCH bit2 is changed to 0;
Step 2 (T2): UE2 does not receive the transfer of data on the pre-configured resource of cluster control channel;
Step 3 (T3): UE2 sends the PDCCH that detects cluster RNTI scrambling on the subframe at the notification message of configuration, if detect notification message PDCCH, and then the detection notice message content, confirm that PDCCH bit2 is changed to 1;
Step 4 (T4): UE2 receives the transmission of cluster control channel on the pre-configured resource of cluster control channel, and receives follow-up cluster transfer of data.
Referring to Fig. 7, a kind of cluster transmission notice device that the embodiment of the invention provides comprises:
Group identification is confirmed unit 11, the sign of the group under the cluster control channel that is used for confirming to be about to transmit;
Notification unit 12 is used for to user equipment (UE) signalling of bouquet control channel notification message, wherein carries the sign of the group under the cluster control channel that is about to transmission.
Preferably, said cluster control channel notification message is carried by physical downlink control channel PDCCH.
Preferably, said PDCCH adopts the fixing Radio Network Temporary Identifier RNTI of group scrambling.
Preferably, the corresponding one or more group identifications of each bit among the said PDCCH.
Preferably, said notification unit 12 also is used for:
With the corresponding relation of PDCCH bit position and group identification in the said cluster control channel notification message, notify to UE through the system message that evolved base station eNB sends.
Preferably, said notification unit 12 also is used for:
With the transmission number of times of said cluster control channel notification message, notify to UE through the system message that evolved base station eNB sends.
Preferably, said notification unit 12 with said cluster control channel notification message, sends to UE on previous or a plurality of continuous subframes of the transmission subframe of cluster control channel.
Preferably, said notification unit 12 with said cluster control channel notification message, sends to UE on the pre-configured resource of cluster control channel notification message;
Wherein, the position of the pre-configured resource of said cluster control channel notification message is corresponding one by one with the position of the pre-configured resource of cluster control channel.
Preferably, the position of the pre-configured resource of said cluster control channel notification message is positioned at the previous subframe of position of the pre-configured resource of cluster control channel;
Perhaps, the position of the pre-configured resource of said cluster control channel notification message, the position with the pre-configured resource of cluster control channel is positioned at same subframe.
Preferably, said notification unit 12 with the pre-configured resource of said cluster control channel notification message, is notified to UE through system message by eNB;
Perhaps, said notification unit 12 sends to UE with said cluster control channel notification message on the pre-configured resource of cluster control channel.
Referring to Fig. 8, a kind of cluster transmission processing device that the embodiment of the invention provides comprises:
Receiving notice message unit 21 is used to receive the cluster control channel notification message that network side sends, and therefrom obtains the sign of the group under the cluster control channel that network side is about to transmission;
Judgment processing unit 22 is used for according to said sign, and the transmission of the cluster control channel of group if having, then receives the cluster control channel under judging whether, otherwise, do not carry out the reception of cluster control channel.
Preferably, said cluster control channel notification message is carried by physical downlink control channel PDCCH.
Preferably, said PDCCH adopts the fixing Radio Network Temporary Identifier RNTI of group scrambling.
Preferably, the corresponding one or more group identifications of each bit among the said PDCCH.
Preferably, said receiving notice message unit 21 also is used for:
Through the system message that evolved base station eNB sends, obtain the corresponding relation of PDCCH bit position and group identification in the said cluster control channel notification message.
Preferably, said receiving notice message unit 21 also is used for:
Through the system message that evolved base station eNB sends, obtain the transmission number of times of said cluster control channel notification message.
Preferably, said receiving notice message unit 21 receives said cluster control channel notification message in previous or a plurality of continuous subframes of the transmission subframe of cluster control channel.
Preferably, said receiving notice message unit 21 receives said cluster control channel notification message on the pre-configured resource of cluster control channel notification message;
Wherein, the position of the pre-configured resource of said cluster control channel notification message is corresponding one by one with the position of the pre-configured resource of cluster control channel.
Preferably, the position of the pre-configured resource of said cluster control channel notification message is positioned at the previous subframe of position of the pre-configured resource of cluster control channel;
Perhaps, the position of the pre-configured resource of said cluster control channel notification message, the position with the pre-configured resource of cluster control channel is positioned at same subframe.
Preferably, the pre-configured resource of said cluster control channel notification message is confirmed according to the system message that eNB sends in said receiving notice message unit 21;
Perhaps, said receiving notice message unit 21 receives said cluster control channel notification message on the pre-configured resource of cluster control channel.
In sum, the technical scheme that the embodiment of the invention provides is introduced cluster control channel transmission notice mechanism, is used to notify the group attribute of the cluster control channel that is about to transmission.Wherein, cluster control channel notification message is carried by PDCCH, the corresponding one or more group identifications of each bit among the PDCCH, and this PDCCH is with the fixing RNTI of group scrambling.Send on one or more continuous subframes of notification message before the cluster control channel sends.The corresponding relation of PDCCH bit and group identification and notification message transmission number of times passes through the system message notifying user equipment by eNB in the notification message.Notification message sends on pre-configured resource, and pre-configured resource location is corresponding one by one with the pre-configured resource location of cluster control channel.The pre-configured resource location of notification message is before the pre-configured resource location of cluster control channel or be positioned at same subframe.The pre-configured resource of notification message is sent on the pre-configured resource of cluster control channel through system message notifying user equipment or notification message by eNB.Therefore, the embodiment of the invention makes subscriber equipment after receiving the PDCCH dispatching command, only need to receive the cluster control channel of affiliated group, greatly reduces the power consumption and the processing complexity of subscriber equipment.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.