CN101662356B - Method and device for synchronizing control signaling in EMBMS system - Google Patents
Method and device for synchronizing control signaling in EMBMS system Download PDFInfo
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Abstract
The invention discloses a method for synchronizing a control signaling in an EMBMS system, which sets a MBMS coordination entity MCE to ENB delay parameter and comprises that: when generating a session initialization/update message, an EMBMS service surface node inserts information on session initialization/update message effective time of the MCE; the MCE resolves the received session initialization/update message, generates a control signaling data packet and inserts information on control signaling effective time at the session initialization/update message effective time, wherein the effective time is the sum of the session initialization/update message effective time and the delay parameter; and the ENB receives and resolves the control signaling data packet and executes the control signaling at the control signaling effective time. The invention also discloses a device for implementing the method. The method and the device ensure the synchronization of the control signaling and the synchronization of an EMBMS service and improve the EMBMS service transmission quality of the EMBMS system.
Description
Technical field
The present invention relates to evolution type multimedia broadcast multicast service (EMBMS, Evolved MultimediaBroadcast Multicast Service) synchronous method and the device of control signal in system, relate to or rather synchronous method and the device of control signal in EMBMS in Long Term Evolution (LTE, Long Term Evolvement) system system.
Background technology
LTE is the next evolution target by the mobile broadband network standard of third generation partner program (3GPP) definition, be supported in the operation on paired frequency spectrum and non-paired frequency spectrum, can realize the efficient utilization to the existing and following radio band, also support the channel width of 1.4～20MHz.The EMBMS business that LTE provides can be supported the Multimedia Data Transmission of higher rate, and the service quality that provides is higher.Fig. 1 is the composition structural representation of System Architecture Evolution SAE, as shown in Figure 1, SGmb, SGi-mb reference point are the interface between the EMBMS service node (MBMS UP) of broadcast multicast service center (BM-SC) and core net, wherein, the SGmb interface provides the chain of command function, and the SGi-mb interface provides user plane functions.BM-SC is the entrance of MBMS service supplier, is used for authorizing and the initiation business, and preserves some business parameters datas, and send to schedule business.Towards the Access Network side, MBMS UP service surface node is that EUTRAN node (ENB) provides the required EMBMS business datum of user terminal UE by the M1 interface, and MBMS CP chain of command node is the chain of command information that EUTRAN node (ENB) provides traffic aided by M3 and M2 interface.The appearance of M2 interface, be and MBMS coordination entity (MCE, MBMSCoordination Entity) arrangement close association, namely, the MCE entity configures with distributed schemes, it is embedded in (shown in the right-hand member in Fig. 1) in ENB, and this moment, the M2 interface did not occur, and MBMS CP is directly connected in ENB; Configure with centralized solution and work as the MCE entity, MCE is separated in outside ENB, and the M2 interface will connect ENB and centralized MCE entity, is used for the transmission of chain of command signaling.MCE is a chain of command entity, and main function is for using the MBSFN operation to carry out unified Radio Resource and the wireless parameter of all evolution base stations (ENB) configuration that many cell MBMSs send in multicast/multicast single-frequency network (MBSFN) territory ".Except when configuration/frequency Radio Resource, this entity also determines some details of radio configuration simultaneously, as modulating and encoding mechanism etc.The MCE entity relates to MBMS session control process, and the MCE entity is not carried out the Signalling exchange between UE and MCE entity.In EUTRAN, in order further to promote EMBMS business multicast feature---be one-to-many (PTM) transmission characteristic, promote as much as possible the service efficiency of interface-free resources, LTE has introduced this new transmission characteristic of MBSFN in Access Network, be used for to strengthen the downlink transfer processing gain of EMBMS business---support descending grand diversity, the throughput of elevator system and user's the experience of the edge of center cell (inter-cell) in the MBSFN territory.
Below introduce the correlation function in MBSFN zone in SAE.
At MBSFN retaining zone (MBSFN Synchronization Area), inner ENB all can obtain zone synchronous and that carry out the MBSFN transmission.The MBSFN retaining zone can support one or more MBSFN regional.In the frequency layer of appointment, an ENB only can belong to a MBSFN retaining zone.The MBSFN retaining zone is independent of the definition of EMBMS service area.MBSFN transmission (MBSFNTransmission) is a kind of radio hookup transmission technology, realizes by transmitting simultaneously consistent signal waveform in a plurality of residential quarters.In the MBSFN zone, the MBSFN of a plurality of residential quarters transmission can be regarded as single transmission from one " large residential quarter " by a UE.MBSFN district (territory MBSFN Area) is a MBSFN zone, comprises in network one group of residential quarter in a MBSFN retaining zone.Residential quarter in the MBSFN retaining zone can consist of a plurality of MBSFN zone, and each MBSFN zone is to be distinguished by its transmission content of carrying and the difference that participates in set of cells.
The EUTRAN technology of LTE is in the process of evolution, transmission for the MBMS business is optimized processing, introduced the MBSFN sending mode---namely: all residential quarters in the MBSFN territory, when sending the EMBMS business with the MBSFN pattern, each residential quarter " in the identical moment, identical resource, the identical EMBMS business datum of transmission of use ".Like this, the EMBMS business datum that many residential quarters send has just realized eating dishes without rice or wine directly merging, and has promoted the quality of service signal.And for receiving UE, a plurality of residential quarters with MBSFN method of synchronization transmission EMBMS business just look like to synthesize virtual " a large residential quarter " with higher-wattage transmission EMBMS business.Finally, UE has obtained the EMBMS business quality of reception preferably, especially at the cell edge place.The corresponding technical foundation of the synchronous EMBMS business of MBSFN sending mode is synchronisation of nodes, content synchronization and time synchronized.But time synchronized wherein and content synchronization are the synchronous supports that needs the EMBMS chain of command, as: the resource distribution change guarantees mechanism synchronously coming into force of each residential quarter.If the resource distribution change can not synchronously come into force, the gain of MC-PTM transmission will be weakened widely.In related art scheme shown in TS36.300, service surface synchronisation requirement and the simultaneous techniques of EMBMS business under the MBSFN sending mode only has been described.But for synchronisation requirement and the simultaneous techniques of EMBMS chain of command under the MBSFN pattern, do not provide clear and definite scheme.
Summary of the invention
In view of this, main purpose of the present invention is to provide synchronous method and the device of control signal in a kind of EMBMS system, can guarantee better the service synchronization under the MBSFN sending mode.
For achieving the above object, technical scheme of the present invention is achieved in that
In a kind of EMBMS system, the synchronous method of control signal, arrange the MBMS coordination entity MCE to the delay parameter of ENB, and the method comprises:
When the EMBMS service surface node generates session initialization/update message, insert described session initialization/update message to the time information that comes into force of MCE;
Described MCE resolves the described session initialization/update message that receives, coming into force constantly of described session initialization/update message, described MCE generates the control signal packet, and insert the time information that comes into force of described control signal, wherein, described coming into force is coming into force constantly and described delay parameter sum of described session initialization/update message constantly; And
ENB receives and resolves described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly.
Preferably, the delay parameter of MCE to ENB is set, is specially:
Calculate MCE to the propagation delay time of each ENB, as effective time delay, and estimation MCE is to the maximum jitter time delay of each ENB with the propagation delay time of maximum, and described delay parameter is set to the value more than or equal to the propagation delay time of described maximum and maximum jitter time delay sum.
Preferably, coming into force of described session initialization/update message determined by following manner constantly:
Calculate described EMBMS service surface node to the propagation delay time of each MCE, with the propagation delay time of maximum as effective time delay, and estimate that the EMBMS service surface node is to the maximum jitter time delay of each MCE, EMBMS service surface node to the delay parameter between MCE is set to the value more than or equal to the propagation delay time of described maximum and maximum jitter time delay sum, with current time and described EMBMS service surface node to the delay parameter sum between MCE as session initialization/update message coming into force constantly to MCE.
Preferably, after described MCE receives session initialization/update message, come into force in described session initialization/update message and constantly forward, and described session initialization/update message is come into force constantly with the delay parameter sum of described MCE to ENB as session initialization/update message to the coming into force constantly of ENB, be inserted in the session initialization/update message that forwards.
Preferably, what described session initialization/update message was carried is MBMS session management signaling, and what described control signal packet carried is the channel configuration signaling of EMBMS business.
In a kind of EMBMS system, the synchronous method of control signal, arrange the EMBMS service surface node to the delay parameter of ENB, and the method comprises:
When described EMBMS service surface node generates session initialization/update message, insert described session initialization/update message to the time information that comes into force of ENB, wherein, described coming into force is the generation moment and the described delay parameter sum of described session initialization/update message constantly;
Described MCE resolves the described session initialization/update message that receives, and generates the control signal packet, with coming into force constantly as the coming into force constantly of described control signal of described session initialization/update message, and inserts described control signal packet; And
ENB receives and resolves described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly.
Preferably, the EMBMS service surface node is set to the delay parameter of ENB, is specially:
Calculate respectively the propagation delay time of described EMBMS service surface node to each MCE, described MCE to each ENB, with two sections propagation delay time sum the maximum wherein as effective time delay, and estimate the maximum jitter time delay of described effective time delay place transmission line, described delay parameter is set to the value more than or equal to described effective time delay and maximum jitter time delay sum.
Preferably, what described session initialization/update message was carried is MBMS session management signaling, and what described control signal packet carried is the channel configuration signaling of EMBMS business.
The synchronizer of control signal in a kind of EMBMS system comprises:
Setting unit is used for the MBMS coordination entity MCE being set to the delay parameter of ENB;
The session initialization/update message generation unit is used for generating session initialization/update message, and inserts described session initialization/update message to the time information that comes into force of MCE;
Resolution unit is used for the described session initialization/update message that receives is resolved;
Control signal packet generation unit, be used for coming into force constantly in described session initialization/update message, generate the control signal packet, and insert the time information that comes into force of described control signal, wherein, described coming into force is coming into force constantly and described delay parameter sum of described session initialization/update message constantly; And
The control signal performance element is used for receiving and resolving described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly.
Preferably, described setting unit comprises:
Effectively the time delay determination module, be used for calculating MCE to the propagation delay time of each ENB, with the propagation delay time of maximum as effective time delay;
Shake time delay estimation module is used for estimating that MCE is to the maximum jitter time delay of each ENB; And
Module is set, is used for described delay parameter and is set to more than or equal to the propagation delay time of described maximum and the value of maximum jitter time delay sum.
Preferably, this device also comprises: the session initialization/update message constantly determining unit that comes into force comprises:
Effectively the time delay determination module, be used for calculating described EMBMS service surface node to the propagation delay time of each MCE, with the propagation delay time of maximum as effective time delay;
Shake time delay estimation module is used for estimating that the EMBMS service surface node is to the maximum jitter time delay of each MCE; And
Determination module, be used for EMBMS service surface node to the delay parameter between MCE and be set to more than or equal to the propagation delay time of described maximum and the value of maximum jitter time delay sum, with current time and described EMBMS service surface node to the coming into force the moment as session initialization/update message of the delay parameter sum between MCE.
Preferably, this device also comprises:
Retransmission unit, after being used for receiving session initialization/update message, come into force in described session initialization/update message and constantly forward, and described session initialization/update message is come into force constantly with the delay parameter sum of described MCE to ENB as session initialization/update message to the coming into force constantly of ENB, be inserted in the session initialization/update message that forwards.
Preferably, what described session initialization/update message was carried is MBMS session management signaling, and what described control signal packet carried is the channel configuration signaling of EMBMS business.
The synchronizer of control signal in a kind of EMBMS system comprises:
Setting unit is used for the EMBMS service surface node being set to the delay parameter of ENB;
The session initialization/update message generation unit, be used for when described EMBMS service surface node generates session initialization/update message, insert described session initialization/update message to the time information that comes into force of ENB, wherein, described coming into force is the generation moment and the described delay parameter sum of described session initialization/update message constantly;
Resolution unit is used for the described session initialization/update message that receives is resolved;
Control signal packet generation unit be used for to generate the control signal packet, with coming into force constantly as the coming into force constantly of described control signal of described session initialization/update message, and inserts described control signal packet; And
The control signal performance element is used for receiving and resolving described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly.
Preferably, described setting unit comprises:
Effectively the time delay determination module, be used for calculating respectively the propagation delay time of described EMBMS service surface node to each MCE, described MCE to each ENB, with two sections propagation delay time sum the maximum wherein as effective time delay;
Shake time delay estimation module is used for estimating the maximum jitter time delay of described effective time delay place transmission line; And
Determination module is used for described delay parameter and is set to value more than or equal to described effective time delay and maximum jitter time delay sum.
Preferably, what described session initialization/update message was carried is MBMS session management signaling, and what described control signal packet carried is the channel configuration signaling of EMBMS business.
the present invention is by arranging delay parameter, on data transmission link during control channel, node on link is as the criterion with delay parameter coming into force constantly of control signal is set, when ENB receives control signal, the moment is carried out described control signal coming into force, constantly taken into full account the time delay of transmission link owing to coming into force, thereby guaranteed that the come into force moment of described control signal in each ENB is identical, thereby make the configuration consistency of EMBMS Traffic Channel, guarantee the synchronous of control signal, thereby guaranteed better the synchronous of EMBMS business, promote the EMBMS service transmission quality of EMBMS system.
Description of drawings
Fig. 1 is the composition structural representation of System Architecture Evolution SAE;
Fig. 2 is the flow chart of the synchronous method of control signal in embodiment of the present invention EMBMS system;
Fig. 3 is another flow chart of the synchronous method of control signal in embodiment of the present invention EMBMS system;
Fig. 4 is the composition structural representation of the synchronizer of control signal in embodiment of the present invention EMBMS system;
Fig. 5 is that another of synchronizer of control signal in embodiment of the present invention EMBMS system forms structural representation.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is elaborated.
Fig. 2 is the flow chart of the synchronous method of control signal in embodiment of the present invention EMBMS system, and as shown in Figure 2, in EMBMS of the present invention system, the synchronous method of control signal comprises the following steps:
Step 201: the MBMS coordination entity MCE is set to the delay parameter C1 of ENB, the delay parameter C2 of MCE to ENB is set simultaneously.
Improve for related physical layer and transport layer in the LTE system, network layer has had brand-new characteristic and demand.Under the scene of disposing single frequency network MBSFN, in the MBSFN territory, the user data transmission of residential quarter is strict synchronous, therefore the UE at the cell boarder place can effectively obtain the downstream signal energy and merges gain, this gain is equivalent to enable in dedicated link the gain that the HSDPA of REL-6 obtains substantially, simultaneously due to the synchronizing characteristics between the small area of MBSFN territory, the interference between EMBMS service bearer resource is obviously to reduce.The present invention guarantees the synchronous of minizone from chain of command, if guaranteed in the MBSFN territory (MCCH in many residential quarters, MBMS Control Channel) configuration of channel is identical, UE can synchronously receive MTCH relevant control information so, thereby can synchronously follow the tracks of the variation of MTCH, reach the purpose that the MTCH service synchronization receives.The present invention is namely by guaranteeing the synchronous of control signal, thereby guarantees the synchronous broadcast of EMBMS business.
EMBMS chain of command signaling is initial by MBMS UP, through MBMS chain of command node (MBMSCP), MCE, and finally arrive ENB, therefore, the present invention need to determine the delay parameter in each transmission path, thereby control signal is realized in each node synchronously, thereby still synchronous when guaranteeing to arrive ENB.Consider that MCE had both generated resource distribution and the wireless parameter configuration signal of MTCH, the MBMS session management signaling of transmitting MBMS UP again, thereby take the MCE entity as the boundary, the propagation delay time between ENB to MBMS UP is divided into two sections and is controlled.
Calculate described EMBMS UP to the propagation delay time of each MCE, with the propagation delay time of maximum as effective time delay, and estimate the EMBMS service surface node to the maximum jitter time delay of each MCE, the EMBMS service surface node is set to more than or equal to the propagation delay time of described maximum and the value of maximum jitter time delay sum to the delay parameter C1 between MCE.After determining the maximum delay on the transmission path between EMBMS UP to MCE, EMBMS UP is sent to the conversation management control signaling of MCE, generates with the conversation management control signaling and adds that the maximum delay maximum delay is as the MCE minimum being come into force constantly constantly.Similarly, calculate MCE to the propagation delay time of each ENB, as effective time delay, and estimate MCE to the maximum jitter time delay of each ENB with the propagation delay time of maximum, described delay parameter C2 is set to the value more than or equal to the propagation delay time of described maximum and maximum jitter time delay sum.
Need to prove, when MCE occurring and be arranged in the situation of ENB, the time delay of MCE to ENB is 0, but for whole EMBMS system, MCE be positioned among ENB or outside situation may occur simultaneously, as long as determine maximum time delay.
When step 202:EMBMS UP generates session initialization/update message, insert described session initialization/update message to the time information that comes into force of MCE.
When MBMS UP sends MBMS Session Start/Update message, embed message to the coming into force constantly of MCE, if current transmitting time value T in message
MBMS (UP) _ START, this time value can be set based on GPS absolute time or SFN System Frame Number, and message is T constantly to coming into force of MCE
MBMS (UP) _ START+ C1.
Step 203: described MCE resolves the described MBMS Session Start/Update message that receives, coming into force constantly of described MBMS Session Start/Update message, described MCE generates the control signal packet, and insert the time information that comes into force of described control signal, wherein, described coming into force is coming into force constantly and described delay parameter sum of described MBMS Session Start/Update message constantly.Here, control signal is resource distribution and the wireless parameter configuration signal of MTCH.When MCE receives the MBMS Session Start/Update message of MBMS UP transmission, coming into force constantly of MBMS Session Start/Update message, generate the resource distribution of MTCH and the packet of wireless parameter configuration signal, be inserted with packet to the coming into force constantly of ENB in described packet, this comes into force and constantly is T
MBMS (UP) _ START+ C1+C2.Simultaneously, MCE, and arranges the coming into force constantly of ENB the MCE constantly transmitting MBMS Session Start/Update message that comes into force in MBMS Session Start/Update message, is similarly T
MBMS (UP) _ START+ C1+C2 is inserted in the message that forwards.MBMS?Session?Start/Update
Step 204:ENB receives and resolves described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly.ENB is according to resource distribution and the wireless parameter configuration signal of the MTCH that carries in described control signal, completes when constantly arriving well corresponding parameter configuration of the resource distribution of MTCH coming into force, and also comprises the modulation system of MTCH etc. in control signal.
by delay parameter C1, the configuration of C2, and taken into full account MBMS UP to MCE, the shake time delay of MCE to ENB, guaranteed MBMS UP to MCE thereby make, strict synchronous between MCE to ENB, make MBMS UP, realized synchronisation of nodes between MCE and ENB, for all the MBMS UP in the EMBMS system, MCE and ENB, although received control signal is nonsynchronous, but after coming into force constantly by delay parameter being provided with, control signal coming into force in above-mentioned node constantly is strict synchronous, thereby guaranteed the Complete Synchronization of MTCH in ENB, realized MBSFN.Chain of command synchronous is the basis of realizing the EMBMS service synchronization.
Fig. 3 is another flow chart of the synchronous method of control signal in embodiment of the present invention EMBMS system, and as shown in Figure 3, in EMBMS of the present invention system, the synchronous method of control signal comprises the following steps:
Step 301: the EMBMS service surface node is set to the delay parameter C3 of ENB.
Calculate respectively the propagation delay time of described EMBMS service surface node to each MCE, described MCE to each ENB, with two sections propagation delay time sum the maximum wherein as effective time delay, and estimating the maximum jitter time delay of described effective time delay place transmission line, described delay parameter C3 is set to the value more than or equal to described effective time delay and maximum jitter time delay sum.
Need to prove, when MCE occurring and be arranged in the situation of ENB, the time delay of MCE to ENB is 0, but for whole EMBMS system, MCE be positioned among ENB or outside situation may occur simultaneously, as long as determine maximum time delay.
Step 302: when described EMBMS service surface node generates MBMS Session Start/Update message, insert described MBMS Session Start/Update message to the time information that comes into force of ENB, wherein, described coming into force is the generation moment and the described delay parameter sum of described MBMS Session Start/Update message constantly.If current transmitting time value T
MBMS (UP) _ START, this time value can be set based on GPS absolute time or SFN System Frame Number, and MBMSSession Start/Update message is T constantly to coming into force of ENB
MBMS (UP) _ START+ C3.
Step 303: described MCE resolves the described MBMS Session Start/Update message that receives, and generation control signal packet, with coming into force constantly as the coming into force constantly of described control signal of described MBMS Session Start/Update message, and insert described control signal packet.Be about to T
MBMS (UP) _ START+ C3 is as control signal coming into force constantly to ENB.
Step 304:ENB receives and resolves described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly.ENB is according to resource distribution and the wireless parameter configuration signal of the MTCH that carries in described control signal, completes when constantly arriving well corresponding parameter configuration of the resource distribution of MTCH coming into force, and also comprises the modulation system of MTCH etc. in control signal.
Although control signal synchronous method shown in Figure 3 is not realized the synchronous of all nodes of transmission link, but guaranteed that last transmission node ENB has realized the synchronous of traffic channel configuration, the i.e. ENB of the channel configuration that remains, all realized the Complete Synchronization of Traffic Channel, thereby it is synchronous to have guaranteed that the EMBMS business sends.Delay parameter C3 has taken into full account the time delay of EMBMS UP to each ENB, and is provided with the shake time delay, thereby guarantees that the control signal that EMBMS UP is sent to ENB all comes into force at the synchronization of setting, and has guaranteed the unified configuration of ENB side to MTCH, has realized MBSFN.
Fig. 4 is the composition structural representation of the synchronizer of control signal in embodiment of the present invention EMBMS system, as shown in Figure 4, in EMBMS of the present invention system, the synchronizer of control signal comprises: setting unit 40, session initialization/update message generation unit 41, resolution unit 42, control signal packet generation unit 43, control signal performance element 44, session initialization/update message come into force determining unit 45 and retransmission unit 46 constantly, wherein, setting unit 40 is used for the MBMS coordination entity MCE being set to the delay parameter of ENB.Described setting unit 40 comprises: effective time delay determination module, be used for calculating MCE to the propagation delay time of each ENB, with the propagation delay time of maximum as effective time delay; Shake time delay estimation module is used for estimating that MCE is to the maximum jitter time delay of each ENB; Module is set; Being used for described delay parameter is set to more than or equal to the propagation delay time of described maximum and the value of maximum jitter time delay sum.
Session initialization/update message generation unit 41 is used for generating session initialization/update message, and inserts described session initialization/update message to the time information that comes into force of MCE.Resolution unit 42 is used for the described session initialization/update message that receives is resolved.Control signal packet generation unit 43 is used for coming into force constantly in described session initialization/update message, generate the control signal packet, and insert the time information that comes into force of described control signal, wherein, described coming into force is coming into force constantly and described delay parameter sum of described session initialization/update message constantly.Control signal performance element 44 is used for receiving and resolving described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly.
Session initialization/update message comes into force constantly, and determining unit 45 is used for determining coming into force constantly of session initialization/update message.Comprise with lower module: effective time delay determination module, be used for calculating described EMBMS service surface node to the propagation delay time of each MCE, with the propagation delay time of maximum as effective time delay.Shake time delay estimation module is used for estimating that the EMBMS service surface node is to the maximum jitter time delay of each MCE.Determination module, be used for EMBMS service surface node to the delay parameter between MCE and be set to more than or equal to the propagation delay time of described maximum and the value of maximum jitter time delay sum, with current time and described EMBMS service surface node to the coming into force the moment as session initialization/update message of the delay parameter sum between MCE.
After retransmission unit 46 is used for receiving session initialization/update message, come into force in described session initialization/update message and constantly forward, and described session initialization/update message is come into force constantly with the delay parameter sum of described MCE to ENB as session initialization/update message to the coming into force constantly of ENB, be inserted in the session initialization/update message that forwards.
in EMBMS of the present invention system, the synchronizer of control signal divides and has considered MBMS UP to MCE, the shake time delay of MCE to ENB, guaranteed MBMS UP to MCE thereby make, strict synchronous between MCE to ENB, make MBMS UP, realized synchronisation of nodes between MCE and ENB, for all the MBMS UP in the EMBMS system, MCE and ENB, although received control signal is nonsynchronous, but after coming into force constantly by delay parameter being provided with, control signal coming into force in above-mentioned node constantly is strict synchronous, thereby guaranteed the Complete Synchronization of MTCH in ENB, realized MBSFN.Chain of command synchronous is the basis of realizing the EMBMS service synchronization.
What described session initialization/update message was carried is the MBMS session management signaling of MBMS UP, what carry in described control signal is resource distribution and the wireless parameter configuration signal of MTCH, complete when constantly arriving well corresponding parameter configuration of the resource distribution of MTCH coming into force, also comprise the modulation system of MTCH etc. in control signal.
Need to prove, each above-mentioned unit and module are to realize the necessary parts of method shown in Figure 2, and its function is seen the associated description referring to earlier figures 2.It will be appreciated by those skilled in the art that the function of above-mentioned each unit and module, all can realize by software programming, perhaps, realize by corresponding logical circuit.
Fig. 5 is that another of synchronizer of control signal in embodiment of the present invention EMBMS system forms structural representation, as shown in Figure 5, in EMBMS of the present invention system, the synchronizer of control signal comprises: setting unit 50, session initialization/update message generation unit 51, resolution unit 52, control signal packet generation unit 53 and control signal performance element 54, wherein, setting unit 50 is used for the EMBMS service surface node being set to the delay parameter of ENB.Setting unit 50 comprises: effective time delay determination module, be used for calculating respectively the propagation delay time of described EMBMS service surface node to each MCE, described MCE to each ENB, with two sections propagation delay time sum the maximum wherein as effective time delay; Shake time delay estimation module is used for estimating the maximum jitter time delay of described effective time delay place transmission line; Determination module is used for described delay parameter and is set to value more than or equal to described effective time delay and maximum jitter time delay sum.
Session initialization/update message generation unit 51 is used for when described EMBMS service surface node generates session initialization/update message, insert described session initialization/update message to the time information that comes into force of ENB, wherein, described coming into force is the generation moment and the described delay parameter sum of described session initialization/update message constantly.Resolution unit 52 is used for the described session initialization/update message that receives is resolved.Control signal packet generation unit 53 is used for generating the control signal packet, with coming into force constantly as the coming into force constantly of described control signal of described session initialization/update message, and inserts described control signal packet.Control signal performance element 54 is used for receiving and resolving described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly.
What described session initialization/update message was carried is the MBMS session management signaling of MBMS UP, what carry in described control signal is resource distribution and the wireless parameter configuration signal of MTCH, complete when constantly arriving well corresponding parameter configuration of the resource distribution of MTCH coming into force, also comprise the modulation system of MTCH etc. in control signal.
Although in embodiment of the present invention EMBMS system, the synchronizer of control signal is not realized the synchronous of all nodes of transmission link, but guaranteed that last transmission node ENB has realized the synchronous of traffic channel configuration, the i.e. ENB of the channel configuration that remains, all realized the Complete Synchronization of Traffic Channel, thereby it is synchronous to have guaranteed that the EMBMS business sends.Delay parameter C3 has taken into full account the time delay of EMBMS UP to each ENB, and is provided with the shake time delay, thereby guarantees that the control signal that EMBMS UP is sent to ENB all comes into force at the synchronization of setting, and has guaranteed the unified configuration of ENB side to MTCH, has realized MBSFN.
Need to prove, each above-mentioned unit and module are to realize the necessary parts of method shown in Figure 3, and its function is seen the associated description referring to earlier figures 3.It will be appreciated by those skilled in the art that the function of above-mentioned each unit and module, all can realize by software programming, perhaps, realize by corresponding logical circuit.
The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.
Claims (16)
1. the synchronous method of control signal in an evolution type multimedia broadcast multicast service EMBMS system, is characterized in that, multimedia broadcast-multicast service MBMS coordination entity MCE is set to the delay parameter of EUTRAN node ENB, the method comprises:
When the EMBMS service surface node generates session initialization/update message, insert described session initialization/update message to the time information that comes into force of MCE;
Described MCE resolves the described session initialization/update message that receives, coming into force constantly of described session initialization/update message, described MCE generates the control signal packet, and insert the time information that comes into force of described control signal, wherein, coming into force of described control signal is coming into force constantly and described delay parameter sum of described session initialization/update message constantly; And
ENB receives and resolves described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly,
Wherein, MBMS coordination entity MCE to the delay parameter of ENB is set to larger than or equals the value of described MCE to the propagation delay time of the maximum of each ENB and described MCE to the maximum jitter time delay sum of each ENB,
And wherein, session initialization/update message constantly is set to the current transmitting time value of message to coming into force of MCE and adds more than or equal to the value of EMBMS service surface node to the propagation delay time of the maximum of each MCE and EMBMS service surface node to the maximum jitter time delay sum of each MCE.
2. method according to claim 1, is characterized in that, the delay parameter of MCE to ENB is set, and is specially:
Calculate MCE to the propagation delay time of each ENB, as effective time delay, and estimation MCE is to the maximum jitter time delay of each ENB with the propagation delay time of maximum, and described delay parameter is set to the value more than or equal to the propagation delay time of described maximum and maximum jitter time delay sum.
3. method according to claim 1, is characterized in that, coming into force of described session initialization/update message determined by following manner constantly:
Calculate described EMBMS service surface node to the propagation delay time of each MCE, with the propagation delay time of maximum as effective time delay, and estimate that the EMBMS service surface node is to the maximum jitter time delay of each MCE, EMBMS service surface node to the delay parameter between MCE is set to the value more than or equal to the propagation delay time of described maximum and maximum jitter time delay sum, with current time and described EMBMS service surface node to the delay parameter sum between MCE as session initialization/update message coming into force constantly to MCE.
4. method according to claim 3, it is characterized in that, after described MCE receives session initialization/update message, come into force in described session initialization/update message and constantly forward, and described session initialization/update message is come into force constantly with the delay parameter sum of described MCE to ENB as session initialization/update message to the coming into force constantly of ENB, be inserted in the session initialization/update message that forwards.
5. the described method of any one according to claim 1 to 4, is characterized in that, what described session initialization/update message was carried is MBMS session management signaling, and what described control signal packet carried is the channel configuration signaling of EMBMS business.
6. the synchronous method of control signal in an evolution type multimedia broadcast multicast service EMBMS system, is characterized in that, the EMBMS service surface node is set to the delay parameter of EUTRAN node ENB, the method comprises:
When described EMBMS service surface node generates session initialization/update message, insert described session initialization/update message to the time information that comes into force of ENB, wherein, described coming into force is the generation moment and the described delay parameter sum of described session initialization/update message constantly;
Multimedia broadcast-multicast service MBMS coordination entity MCE is resolved the described session initialization/update message that receives, and generation control signal packet, with coming into force constantly as the coming into force constantly of described control signal of described session initialization/update message, and insert described control signal packet; And
ENB receives and resolves described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly,
Wherein, calculate the propagation delay time of described EMBMS service surface node to each MCE, described MCE to each ENB, with two sections propagation delay time sum the maximum wherein as effective time delay, and estimate the maximum jitter time delay of described effective time delay place transmission line, described delay parameter is set to the value more than or equal to described effective time delay and maximum jitter time delay sum.
7. method according to claim 6, is characterized in that, the EMBMS service surface node is set to the delay parameter of ENB, is specially:
Calculate respectively the propagation delay time of described EMBMS service surface node to each MCE, described MCE to each ENB, with two sections propagation delay time sum the maximum wherein as effective time delay, and estimate the maximum jitter time delay of described effective time delay place transmission line, described delay parameter is set to the value more than or equal to described effective time delay and maximum jitter time delay sum.
8. according to claim 6 or 7 described methods, is characterized in that, what described session initialization/update message was carried is MBMS session management signaling, and what described control signal packet carried is the channel configuration signaling of EMBMS business.
9. the synchronizer of control signal in an evolution type multimedia broadcast multicast service EMBMS system, is characterized in that, this device comprises:
Setting unit is used for multimedia broadcast-multicast service MBMS coordination entity MCE being set to the delay parameter of EUTRAN node ENB;
The session initialization/update message generation unit is used for generating session initialization/update message, and inserts described session initialization/update message to the time information that comes into force of MCE;
Resolution unit is used for the described session initialization/update message that receives is resolved;
Control signal packet generation unit, be used for coming into force constantly in described session initialization/update message, generate the control signal packet, and insert the time information that comes into force of described control signal, wherein, described coming into force is coming into force constantly and described delay parameter sum of described session initialization/update message constantly; And
The control signal performance element is used for receiving and resolving described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly,
Wherein, MBMS coordination entity MCE to the delay parameter of ENB is set to larger than or equals the value of described MCE to the propagation delay time of the maximum of each ENB and described MCE to the maximum jitter time delay sum of each ENB,
And wherein, session initialization/update message constantly is set to the current transmitting time value of message to coming into force of MCE and adds more than or equal to the value of EMBMS service surface node to the propagation delay time of the maximum of each MCE and EMBMS service surface node to the maximum jitter time delay sum of each MCE.
10. device according to claim 9, is characterized in that, described setting unit comprises:
Effectively the time delay determination module, be used for calculating MCE to the propagation delay time of each ENB, with the propagation delay time of maximum as effective time delay;
Shake time delay estimation module is used for estimating that MCE is to the maximum jitter time delay of each ENB; And
Module is set, is used for described delay parameter and is set to more than or equal to the propagation delay time of described maximum and the value of maximum jitter time delay sum.
11. device according to claim 9 is characterized in that, this device also comprises: the session initialization/update message constantly determining unit that comes into force comprises:
Effectively the time delay determination module, be used for calculating described EMBMS service surface node to the propagation delay time of each MCE, with the propagation delay time of maximum as effective time delay;
Shake time delay estimation module is used for estimating that the EMBMS service surface node is to the maximum jitter time delay of each MCE; And
Determination module, be used for EMBMS service surface node to the delay parameter between MCE and be set to more than or equal to the propagation delay time of described maximum and the value of maximum jitter time delay sum, with current time and described EMBMS service surface node to the coming into force the moment as session initialization/update message of the delay parameter sum between MCE.
12. device according to claim 11 is characterized in that, this device also comprises:
Retransmission unit, after being used for receiving session initialization/update message, come into force in described session initialization/update message and constantly forward, and described session initialization/update message is come into force constantly with the delay parameter sum of described MCE to ENB as session initialization/update message to the coming into force constantly of ENB, be inserted in the session initialization/update message that forwards.
13. according to claim 9 to 12, the described device of any one, is characterized in that, what described session initialization/update message was carried is MBMS session management signaling, and what described control signal packet carried is the channel configuration signaling of EMBMS business.
14. in an evolution type multimedia broadcast multicast service EMBMS system, the synchronizer of control signal, is characterized in that, comprising:
Setting unit is used for the EMBMS service surface node being set to the delay parameter of EUTRAN node ENB;
The session initialization/update message generation unit, be used for when described EMBMS service surface node generates session initialization/update message, insert described session initialization/update message to the time information that comes into force of ENB, wherein, described coming into force is the generation moment and the described delay parameter sum of described session initialization/update message constantly;
Resolution unit is used for the described session initialization/update message that receives is resolved;
Control signal packet generation unit be used for to generate the control signal packet, with coming into force constantly as the coming into force constantly of described control signal of described session initialization/update message, and inserts described control signal packet; And
The control signal performance element is used for receiving and resolving described control signal packet, carries out described control signal when coming into force of described control signal arrived constantly,
Wherein, calculate the propagation delay time of described EMBMS service surface node to each MCE, described MCE to each ENB, with two sections propagation delay time sum the maximum wherein as effective time delay, and estimate the maximum jitter time delay of described effective time delay place transmission line, described delay parameter is set to the value more than or equal to described effective time delay and maximum jitter time delay sum.
15. device according to claim 14 is characterized in that, described setting unit comprises:
Effectively the time delay determination module, be used for calculating respectively the propagation delay time of described EMBMS service surface node to each MCE, described MCE to each ENB, with two sections propagation delay time sum the maximum wherein as effective time delay;
Shake time delay estimation module is used for estimating the maximum jitter time delay of described effective time delay place transmission line; And
Determination module is used for described delay parameter and is set to value more than or equal to described effective time delay and maximum jitter time delay sum.
16. according to claim 14 or 15 described devices is characterized in that, what described session initialization/update message was carried is MBMS session management signaling, and what described control signal packet carried is the channel configuration signaling of EMBMS business.
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| CN 200810118461 CN101662356B (en) | 2008-08-25 | 2008-08-25 | Method and device for synchronizing control signaling in EMBMS system |
| PCT/CN2009/000972 WO2010022587A1 (en) | 2008-08-25 | 2009-08-25 | Synchronization method and apparatus for controlling signaling in embms system |
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| US9526078B1 (en) | 2015-01-26 | 2016-12-20 | Sprint Communications Company L.P. | Wireless communication system to synchronize a single frequency network |
| WO2017079920A1 (en) * | 2015-11-11 | 2017-05-18 | 华为技术有限公司 | Method and device for synchronization |
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| CN1585316A (en) * | 2003-08-19 | 2005-02-23 | 北京三星通信技术研究有限公司 | Method for building public transmitting channel for MBMS service |
| CN1921406A (en) * | 2005-08-22 | 2007-02-28 | 中兴通讯股份有限公司 | Computing method for connecting frame number displacement of activation time in empty-orifice synchronous configuration signal |
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| WO2008054113A2 (en) * | 2006-10-31 | 2008-05-08 | Lg Electronics Inc. | A method and mobile terminal of establishing a communication link between a mobile terminal and a network |
| EP2242232B1 (en) * | 2008-02-04 | 2015-09-16 | Alcatel Lucent | A method and base station for synchronizing a signalling message |
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| CN1921406A (en) * | 2005-08-22 | 2007-02-28 | 中兴通讯股份有限公司 | Computing method for connecting frame number displacement of activation time in empty-orifice synchronous configuration signal |
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