CN102036176A - Method and network system for synchronously recovering multimedia broadcast multicast service - Google Patents
Method and network system for synchronously recovering multimedia broadcast multicast service Download PDFInfo
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Abstract
The invention discloses a method and a network system for synchronously recovering a multimedia broadcast multicast service (MBMS), which are used for solving the problem that correct synchronous recovery cannot be performed after packets are lost in the prior art. The method comprises the following steps that: a lower-layer network element of which a service packet is lost sends a request message for acquiring the information of the lost service packet to adjacent lower-layer network elements; the adjacent lower-layer network elements feed back the information of the lost service packet to the lower-layer network element of which the service packet is lost; and further, the lower-layer network element of which the service packet is lost performs synchronous recovery according to the acquired information of the lost service packet. By the method, the lower-layer network element of which the packet is lost continuously is synchronously recovered by synchronous information acquired from one or a plurality of adjacent lower-layer network elements in a group of network elements for realizing MBMS synchronous transmission to prevent the lower-layer network element from desynchronizing for a long time, so the robustness and efficiency of MBMS service synchronization are improved greatly.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of method and network system of synchronous recovery of multimedia broadcast-multicast service.
Background technology
In order to effectively utilize mobile network resource, 3GPP (3rd Generation Partnership Project, third generation partner program) multimedia broadcast multi-broadcasting business MBMS (Multimedia Broadcast Multicast Service) has been proposed, this MBMS business is a kind of technology that transmits data from a data source to a plurality of targets, realize sharing of network (comprising core net and Access Network) resource, improved the utilance of Internet resources (especially air interface resource).The MBMS of 3GPP definition not only can realize the classes of messages multicast and the broadcasting of plain text low rate, but also can realize the broadcasting and the multicast of high-speed multimedia business, multiple rich video, audio frequency and multimedia service are provided, this has complied with the trend of following mobile data development undoubtedly, for the development of 3G provides better professional prospect.
In described 3GPP MBMS, the MBMS business can adopt the multicast mode to send, different according to concrete transmission and receive mode, the multicast mode of described MBMS business is divided into again: single frequency network multicast broadcast MBSFN (Multicast/Broadcast over Single Frequency Network) mode and soft merging mode.Wherein:
In the MBSFN send mode, the base station network element adopts identical modulating-coding form in a plurality of sub-districts, adopt identical physical resource to send identical physical signalling, a plurality of sub-districts of adopting identical physical resource and MBSFN sending mode to send the same MBMS service signal have constituted a MBSFN zone.The feature of the many cell transmission of MBMS comprises: 1) in the inter-sync transmission of MBSFN zone; 2) support user terminal to merge the MBSFN signal that receives from a plurality of sub-districts, improve the gain of received signal.The MBSFN sending mode is applied to LTE (Long Term Evolution in the prior art, Long Term Evolution) MBMS in the system, the MBMS of special-purpose carrier frequency sends in UMTS (Universal Mobile Telecommunications System, the universal mobile telecommunications system) system.
Soft merging (soft combining) send mode and MBSFN send mode are similar, in the UMTS system, the base station network element sends identical business tine in a plurality of sub-districts, and the MBMS service signal that user terminal receives simultaneously from a plurality of sub-districts carries out soft merging reception, improves receiving gain.Different with the MBSFN mode is that different spreading code and cell scrambling are adopted in described a plurality of sub-districts when sending the MBMS business.
In existing MBMS technology, in LTE system and UMTS system, adopt following channel architecture respectively:
In the LTE system, a MBMS business is mapped to a MTCH (Multicast traffic Channel, multicast service channel).A plurality of MTCH channels can be by the time-multiplexed MCH that is mapped to of the mode of dynamic multiplexing (on MCH (Multicast Channel, the Multicast Channel) transmission channel; In the LTE of reality networking, several MBSFN business are arranged on the MBSFN zone, the data channel MTCH that possesses a plurality of MBSFN business in identical MBSFN zone, and the multicast control channel MCCH of this MBSFN business (Multicast Control Channel) can be multiplexed into a Multicast Channel MCH.
In the UMTS system, belong to identical MBSFN zone in other words the MTCH of one group of MBMS business of MBSFN cluster or MSMS group can be mapped to same transmission channel.In the special carrier frequency technology of UMTS, adopt on all four cell scrambling because constitute a plurality of sub-districts of MBSFN transmission, the physical channel that therefore carries MCCH also adopts the MBSFN mode to send.
In the existing LTE technology, described multiplexing a plurality of MBMS business on same transmission channel can adopt the resource of the following dynamic shared channel of mode, and this mode is called dynamic multiplexing (dynamic multiplexing).Below the dynamic multiplexing mode is elaborated.
In LTE MBMS, at first defined the notion of dispatching cycle, or be called MSAP (MBSFN subframe allocation pattern) occasion length.On time domain, be defined as a time period length dispatching cycle, for example 320 or 640ms, in this time period, a transmission channel takies and distributes some MBSFN subframes (subframe) resource.
In a dispatching cycle, the data of a MBMS logic channel take the resource of the transmission channel of its mapping continuously, the just continuous MBSFN sub-frame resources that takies the MCH channel, the whole transmission of business datum that needs to send in this dispatching cycle up to this business finishes.The data of different business can send in same MBSFN subframe.Just the data from different logic channels are serially connected in transmission among the same MAC PDU (medium access control layer protocol data cell) by the media access control MAC layer.
Concrete, corresponding TTI (the Transmission Time Interval of the MBSFN wireless sub-frame of a LTE definition, Transmission Time Interval), in a TTI, can send one or more transmission data blocks, the corresponding MAC PDU (medium access control layer protocol data cell) of each transmission data block.In a MAC PDU, can comprise a plurality of MAC SDU (service data unit), the data of the MBMS logic channel that the different MAC SDU carryings among the same MAC PDU are different.
The a plurality of multiplexing sending orders of MBMS logic channel in a dispatching cycle can be given user's receiving terminal by MCCH channel or other signaling.Above-mentioned MBMS logic channel comprises MTCH, MCCH or MSCH (schedule information) etc.
The example of a dynamic multiplexing as shown in Figure 1, a plurality of business are the dynamic multiplexing channel resource in a dispatching cycle, the multiplexing data that professional S1 and professional S2 are arranged in a dispatching cycle.
For realizing that the MBMS business realizes synchronous transmission in the minizone of a plurality of network element entities (base station network element), existing public technology provides a kind of synchronous protocol to handle (SYNC) mode, the network system of this method correspondence comprise upper strata network element and lower network element (1～N), as shown in Figure 2.The synchronized transmission process of this SYNC agreement comprises following treatment step:
Step S1, upper strata network element send the MBMS business data packet, and (1～N), this business data packet has been carried business datum, and carries timestamp information, sequence of data packet information, accumulative total business datum length information etc. to each lower network element.Wherein:
The upper strata network element to one or more continuous business data packet acceptances of the bid sensible with timestamp information, these marks the packet of identical time stamp form data bursts (data burst) or be called synchronizing sequence (synchronization Sequence); The timestamp difference of adjacent two synchronizing sequences is a synchronizing sequence length;
Described accumulative total business data packet length information is meant in the synchronizing sequence, or from certain starting point, arrives the business datum cumulative length of described business data packet all business data packet before.
Last at each synchronizing sequence, the upper strata network element also sends a kind of SYNC control frame, and this control frame has carried the total number of business data packet, the business datum total length information of its corresponding synchronizing sequence.As shown in Figure 3 upper strata the network element downwards synchronizing sequence that sends of layer network element and an example of control frame.
Step S2, lower network element receives the above-mentioned synchronizing sequence that the upper strata network element is sent, and by detecting the sequence number of business data packet, detects whether there be losing of business data packet, and the total length of the business data packet of having lost.Wherein:
The sequence number of the packet of the synchronizing sequence that lower network element receives by detection, can detect and whether have losing of business data packet, for example to have received the sequence number of the business data packet of synchronizing sequence X be N-1 to lower network element, N, N+3, N+4..., then lower network element can detect packet N+1, and N+2 loses.Lower network element is the poor of the packet of N and the N+3 cumulative data length of carrying by detecting sequence number further, can know the business datum N+1 that is lost, the business datum length of N+2 and.
Lower network element can also be obtained the total number of packet and the business datum total length of its corresponding synchronizing sequence by reading above-mentioned SYNC control frame.This control frame also is the mark that a synchronizing sequence finishes.
Step S3, each lower network element begins to send business data packet successively at wave point in the dispatching cycle of its timestamp correspondence to the entrained business datum of the business data packet in the same synchronizing sequence.
Be mapped to some business data packet (from one or more synchronizing sequences) of a business in the dispatching cycle, when carrying out wireless link protocol layer (RLC) processing, carry out RLC segmentation and serial connection processing, obtained maximum wireless interface resource service efficiency.
Each lower network element is independently finished the radio link control of MBMS business data packet (RLC) is handled, and comprises distributing RLC sequence number, RLC burst and serial connection (segmentation and concatenation).Being assigned as of RLC sequence number 0 recycles between maximum.Under normal circumstances, each lower network element is safeguarded current RLC sequence number, and carry out identical processing according to the packet that receives, and Initial R LC sequence number can keep synchronous by configuration, like this, each lower network element can keep the unanimity of RLC serial number assignment in the deal with data process.
In the prior art, packet loss occurring, when particularly not having continuous packet loss, lower network element is by detecting the length of data package that described cumulative data packet length can obtain losing.In the case, lower network element can be constructed a virtual data pack when carrying out the rlc layer protocol processes, and its length is the length of data package of losing.This virtual data pack is the same with other packet that correctly receives carries out the RLC serial connection, burst is handled.
When real wave point sends, the TTI that includes these virtual data bag data will not send, but mourn in silence (Mute).This processing mode becomes mute and handles.Handle by mute, can avoid the data of virtual data bag and the inconsistent interference that causes of business datum that other network element correctly receives.And, because the length of this virtual data pack is consistent with the length of data package of losing, the size in the space that it occupies in RLC PDU is consistent with the space size that real packet occupies, after this packet of losing, the starting position of the packet that correctly receives in RLC PDU is consistent with the network element that packet loss do not occur like this.Just, be used for keeping the network element of packet loss in the prior art and do not have packet loss network element uniformity of treatment by such processing.
Consider that there is the possibility of restarting in lower network element, after restarting, lose for the RLC sequence number of this MBMS service maintenance before it, at this moment, lower network element can't determine that the next one is received the MBMS business data packet carries out RLC sequence number after RLC burst serial connection is handled, to keep and adjacent network element sub-district is carried out RLC serial connection burst to this business data packet and handled the sequence number of back distribution and be consistent.
In order to address this problem, in the prior art, the method that has adopted the RLC sequence number to reset, concrete, beginning a dispatching cycle, the RLC sequence number is since 0 distribution, and the lower network element of restarting like this can keep the synchronous of RLC sequence number with other network element again since a dispatching cycle.According to the length of synchronizing sequence and dispatching cycle length relation, its mapping relations can comprise following several:
(11) a plurality of synchronizing sequences are mapped to a dispatching cycle, and this moment, dispatching cycle, length was the integral multiple of synchronizing sequence length.
(12) synchronizing sequences are mapped to a plurality of dispatching cycles, and this moment, the length of synchronizing sequence was the integral multiple of dispatching cycle.
By the method for above-mentioned (11), (12), a plurality of lower network element receive duplicate business data packet, and according to the content of SYNC agreement, can carry out the synchronous service data processing, thereby keep synchronous transmission business datum.
In above-mentioned description, upper strata network element and lower network element can be the compound modes of following network element, but are not limited to following combination:
● in the networking of the MBMS of UMTS system service synchronization, the upper strata network element is a core network element, and lower network element is RNC (radio network controller).
● in the networking of the MBMS of LTE system service synchronization, the upper strata network element is BMSC (BroadCast MultiCast Service center), and lower network element is Node B (E-NB, E-UTRAN NodeB).
Fig. 2 example the building-block of logic of described upper strata network element-lower network element.Wherein the interface between lower network element is logic interfacing or physical interface.
In above-mentioned MBMS service integration and method for synchronous, consider that data are transferred to the process of lower network element from the upper strata network element, there is the possibility of losing, and continuous data-bag lost may appear, technology according to existing synchronous protocol SYNC, lower network element can detect the number of the packet of losing and the total length of the packet of losing, and the lost data packets virtual according to these information structurings, and these virtual data pack are carried out the user plane protocol layer handle, just as these packets are not lost.But there is a serious problem in above-mentioned method: promptly, consider the particularity that RLC handles, a business data packet, or be called RLC SDU (RLC Service Data Unit), when carrying out the RLC processing, the size in the space of the RLC PDU that it takies (rlc protocol data cell) depends on the position that it is concrete.Concrete, a RLC SDU is in RLC handles, and the number of the rlc protocol LI (Length Indication) that it takies is uncertain, depends on its concrete condition in RLC PDU, and its number can be 0, or 1, or 2.Thereby, when specifically handling:
● if the business data packet number of losing is 1, then the lower network element space that takies RLC PDU that can obtain determining according to its length computation.
● if continuous data is lost, technology according to existing SYNC agreement, lower network element has no idea to judge each length of data package of several packets of losing, and can only obtain the total length of these business data packet of losing, correct calculation so the size that these packets of losing take the load space of RLC PDU is really had no idea.
In above-mentioned problem, if there be the multiplexing of a plurality of business, lower network element can not send the data (after the business data packet that last correctly receives) of the business that packet loss occurs, and, under the situation of a plurality of service integration transmission channels, occurring in the dispatching cycle of packet loss, this lower network element also can not send other the professional data after this business, otherwise the interference of minizone will occur.
Summary of the invention
Technical problem to be solved by this invention is, the method and the network system of the synchronous recovery of multimedia broadcast-multicast service is provided, and is used for solving prior art the problem can't accurate synchronization recovered takes place behind the packet loss.
In order to address the above problem, the present invention proposes a kind of method of synchronous recovery of multimedia broadcast-multicast service, comprise the steps:
Steps A: the lower network element of business datum packet loss takes place, send the request message that obtains the described business datum package informatin of losing to adjacent lower network element;
Step B: described adjacent lower network element is fed back the information of described business data packet of losing to the lower network element of described generation business datum packet loss.
Described method also comprises: step C: the lower network element of described generation business datum packet loss is recovered to handle according to the described business datum package informatin of losing that obtains synchronously.
In steps A, the lower network element of business datum packet loss takes place, when the losing of one or continuous a plurality of business data packet judge occurring, send a request message to the one or more lower network element that are adjacent, described request message is the first chain of command message of the described business datum package informatin of losing of acquisition request.
The information that the described first chain of command message is carried comprises: the synchronizing sequence sign.The information that the described first chain of command message is carried also comprises: the sequence number information of the packet of indication request or the information of a synchronizing sequence total length of indication request or their combination.The sequence number information of the packet of described indication request is the sequence number of one group of packet; Or one group id lose business data packet play/end the information of sequence number; Or the information of the homing sequence of a group id packet number and persistence length; Or last sequence of data packet information of receiving of described lower network element, this moment, the packet of described request was a packet after last data that receives described in the described synchronizing sequence.The information that the described first chain of command message is carried further comprises: the information of the total business data packet number of indication request.
In step B, if described adjacent lower network element has the information of described business data packet of losing, then the lower network element to described generation business datum packet loss sends the second chain of command message, and the described second chain of command message is carried following information: by the length information of the indicated part or all of business data packet of the entrained information of the first chain of command message.
The length information of the part or all of business data packet that the described second chain of command message is carried comprises following information: the sequence number and the corresponding length of data package of indicating described packet; Or, indicate the beginning sequence number of one group of continuous data bag and end sequence number, and indicate pairing length of data package; Or, indicate the beginning sequence number and the number of one group of continuous data bag, and indicate corresponding length of data package; Or when described adjacent network element did not have the information of part or all of described business data packet of losing, the length of indicating described business data packet of losing was particular value or the sequence number that does not carry described business data packet of losing/or length information.
If the lower network element of described generation business datum packet loss, total business data packet number of a synchronizing sequence of request and/or total business datum length information in the described first chain of command message, the described second chain of command message is further also carried following information: total business data packet number information of described synchronizing sequence, and/or total business datum length information of described synchronizing sequence.
In step C, the lower network element of described generation business datum packet loss is according to the length of the business data packet of carrying in the described second chain of command message, and the business datum that obtains losing wraps in the size and the position in the space of the wireless link control protocol data cell (RLC PDU) that occupies in Radio Link control (RLC) protocol processes.Handle the Transmission Time Interval (TTI) that comprises the business datum of losing thereby can mourn in silence.
In step C, the lower network element of described generation business datum packet loss is according to the length from the business data packet of carrying in a plurality of described second chain of command message, comprehensive a plurality of or all adjacent lower network element return the described business datum package informatin of losing recover synchronously to handle.
The present invention also provides a kind of network system of synchronous recovery of multimedia broadcast-multicast service, comprises a upper strata network element and some lower network element 1～N; In described some lower network element, comprise the lower network element that the business datum packet loss takes place, and with these adjacent one or more lower network element of lower network element that business datum packet loss takes place, be called adjacent lower network element; Wherein,
The lower network element of described generation business datum packet loss is used for sending the request message that obtains the described business datum package informatin of losing to one or more adjacent lower network element; Described adjacent lower network element is used for when the information of described business data packet of losing is arranged, and then feeds back the described business datum package informatin of losing to the lower network element of described generation business datum packet loss.
The lower network element of described generation business datum packet loss is further used for recovering synchronously to handle according to the described business datum package informatin of losing that obtains.
The lower network element of described generation business datum packet loss comprises:
Detection module is used to judge whether to occur losing of or continuous a plurality of business data packet;
The first key-course message transmission module, be used for when the business datum packet loss takes place, generation is used to obtain the first key-course message of the described business datum package informatin of losing, and the first key-course message is sent to adjacent lower network element, and described request message is the first key-course message;
The second key-course message sink module, be used to receive the second key-course message from adjacent lower network element, the described second key-course message carries the described business datum package informatin lost of adjacent lower network element to the lower network element feedback of described generation business datum packet loss;
Recover processing module synchronously, be used for, recover synchronously to handle according to the described business datum package informatin of losing that obtains from the described second key-course message.
Described adjacent lower network element comprises:
The first key-course message sink module is used to receive the first key-course message from the lower network element of described generation business datum packet loss;
The business data packet retrieval module is used for describedly judging according to the first key-course message retrieval whether this adjacent lower network element has the information of described business data packet of losing;
The second key-course message transmission module, when the business data packet retrieval module retrieves the information of part or all of described business data packet of losing, requirement according to the described first key-course message generates the second key-course message, and the information of carrying part or all of described business data packet of losing sends to the lower network element of described generation business datum packet loss.
The information that the described first chain of command message is carried comprises: the synchronizing sequence sign; Further comprise: the information of the sequence number information of the packet of indication request or a synchronizing sequence total length of indication request or the information of the total business data packet number of indication request or their combination.The sequence number information of the packet of described indication request is the sequence number of one group of packet; Or one group id lose business data packet play/end the information of sequence number; Or the information of the homing sequence of a group id packet number and persistence length; Or last sequence of data packet information of receiving of described lower network element, this moment, the packet of described request was a packet after last data that receives described in the described synchronizing sequence.
The described second chain of command message is carried following information: by the length information of the indicated part or all of business data packet of the entrained information of the first chain of command message.The length information of the part or all of business data packet that the described second chain of command message is carried comprises following information:
Indicate the sequence number and the corresponding length of data package of described packet; Or, indicate the beginning sequence number of one group of continuous data bag and end sequence number, and indicate pairing length of data package; Or, indicate the beginning sequence number and the number of one group of continuous data bag, and indicate corresponding length of data package; Or when described adjacent network element did not have the information of part or all of described business data packet of losing, the length of indicating described business data packet of losing was particular value or sequence number and/or the length information that does not carry described business data packet of losing.
If the lower network element of described generation business datum packet loss, total business data packet number of a synchronizing sequence of request and/or total business datum length information in the described first chain of command message, the described second chain of command message is further also carried following information: total business data packet number information of described synchronizing sequence, and/or total business datum length information of described synchronizing sequence.
Described synchronous recovery processing module, length according to the business data packet of carrying in the described second chain of command message, dispatch when handling, obtain the length of its each business data packet of losing, calculate the size that each business datum of losing wraps in the space of the wireless link control protocol data cell (RLC PDU) that occupies in Radio Link control (RLC) protocol processes.
The method of the synchronous recovery of multimedia broadcast-multicast service of the present invention and network system, in a group NEs of realizing the MBMS synchronized transmission, the lower network element that continuous packet loss occurs is by obtaining synchronizing information from adjacent one or more lower network element, recover synchronously according to synchronizing information, can avoid this lower network element to lose for a long time synchronously, thereby improve the robustness and the efficient of MBMS service synchronization greatly.
Description of drawings
Fig. 1 is the professional schematic diagrames that adopt the resource of dynamic multiplexing mode shared channel of a plurality of MBMS;
Fig. 2 is a network system schematic diagram of realizing many network elements synchronized transmission MBMS business;
Fig. 3 sends a synchronizing sequence of MBMS business and the schematic diagram of its control frame;
Fig. 4 is the method schematic diagram of the synchronous recovery of multimedia broadcast-multicast service of the present invention;
Fig. 5 is the network system schematic diagram of the synchronous recovery of multimedia broadcast-multicast service of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
At multimedia broadcast-multicast service MBMS when synchronous, the problem that has packet loss in dispatching cycle, the invention provides a kind of method and network system of synchronous recovery of multimedia broadcast-multicast service, especially at UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system), 3GPP LTE (Long Term Evolution, Long Term Evolution) etc., realize the synchronous recovery of business datum in the content synchronization networking between many network elements of MBMS (multimedia broadcast-multicast service) of wireless communication technologys such as UMTS, LTE.Recover the main information that adopts the business data packet that lower network element that the business datum packet loss takes place lost to adjacent lower network element request synchronously, recover synchronously according to the information of the business data packet of obtaining from adjacent lower network element of losing by the lower network element that the business datum packet loss takes place.
As shown in Figure 4, shown the method schematic diagram of the synchronous recovery of multimedia broadcast-multicast service of the present invention, the method for the synchronous recovery of this multimedia broadcast-multicast service comprises:
Step 401: the lower network element of business datum packet loss takes place, send the request message that obtains the described business datum package informatin of losing to adjacent lower network element;
Step 402:, then feed back the described business datum package informatin of losing to the lower network element of described generation business datum packet loss if described adjacent lower network element has the information of described business data packet of losing;
Step 403: the lower network element of described generation business datum packet loss is recovered to handle according to the described business datum package informatin of losing that obtains synchronously.
In step 401, the lower network element of business datum packet loss takes place, send the request message that obtains the described business datum package informatin of losing to adjacent lower network element.
Lower network element is being judged when the losing of one or continuous a plurality of business data packet occurring, determine from lower network element as described generation business datum packet loss, send a request message to other one or more lower network element that are adjacent, the described business datum package informatin of losing of acquisition request is specially the synchronizing information of described business data packet of losing.Particularly, the lower network element of this generation business datum packet loss sends the first chain of command message to its adjacent lower network element, the information of the described business data packet of losing of acquisition request.
Further, the described first chain of command message can be carried the business datum package informatin that following information need be asked to obtain it:
● the synchronizing sequence sign, this synchronizing sequence sign can be the timestamp information of synchronizing sequence;
● the sequence number information of one group of packet;
Optionally, when specifically implementing, the sequence number information of described one group of packet can be the sequence number of one group of packet, like this, and the corresponding sequence number of each business data packet of losing; Perhaps, can be a group id lose business data packet play/end the information of sequence number, the business data packet of losing this moment is that sequence number is each to playing/end all business data packet between the sequence number (beginning sequence number, end sequence number); Perhaps, can be the information of the homing sequence number and the persistence length of a group id packet, the business data packet of losing this moment is for from homing sequence number, a continuous described persistence length packet.
Or optionally, do not carry sequence of data packet information in the first chain of command message, be interpreted as asking each length of data package of described synchronizing sequence this moment.
Or optionally, the sequence number information of described one group of packet can be an initial sequence number information, at this moment, the packet of described request is in the described synchronizing sequence, number begins each length of data package to this last packet of synchronizing sequence from this preface homing sequence.
● synchronizing sequence total length of indication request optionally, also can comprise the information of total business data packet number.
Optionally, when specifically implementing, can obtain total length of data packets and total number of the synchronizing sequence of described synchronizing sequence sign indication by an indicating bit indication.Or default, do not carry any sequence of data packet information, be interpreted as information requested this moment is the total data packet length of described synchronizing sequence and total packet number.
In step 402, described adjacent lower network element is fed back the described business datum package informatin of losing to the lower network element of described generation business datum packet loss.
If described adjacent lower network element has the partly or entirely information of described business data packet of losing, then the lower network element to described generation business datum packet loss sends the second chain of command message, by the described business datum package informatin of losing of the described second chain of command message feedback.
The described second chain of command message is carried following information:
Length information by the indicated part or all of business data packet of the entrained information of the first chain of command message.Concrete:
Indicate the sequence number and the corresponding length of data package of described packet;
Or, indicate the beginning sequence number of one group of continuous data bag and end sequence number, and indicate pairing length of data package;
Or, indicate the beginning sequence number and the number of one group of continuous data bag, and indicate corresponding length of data package.
If described adjacent network element does not have the partly or entirely information of described business data packet of losing, then described adjacent network element is indicated the length of these business data packet in the second chain of command message be particular value, or do not carry the length information of these business data packet in the second chain of command message.
If the lower network element of described generation business datum packet loss, total business data packet number of a synchronizing sequence of request or total business datum length information in the described first chain of command message, then described adjacent lower network element is carried total business data packet number information of described synchronizing sequence in the second chain of command message, optionally, the total business datum length information that also comprises described synchronizing sequence.
In step 403, the lower network element of described generation business datum packet loss is recovered to handle according to the described business datum package informatin of losing that obtains synchronously.
The lower network element of described generation business datum packet loss is according to the length of the business data packet of carrying in the described second chain of command message, obtain the length of its part or all of business data packet of losing, this lower network element can calculate the size that business datum wraps in the space of the RLC PDU that occupies in the rlc protocol processing like this.
If the lower network element that data-bag lost takes place obtains the length of data package of partial loss by the described second chain of command message, and continuous packet in the non-synchronizing sequence of the packet of unknown lengths, then lower network element can be known the length of data package of single unknown lengths according to synchronous protocol (SYNC), and the business datum that further obtains losing wraps in the size in the space of the RLC PDU that occupies in the rlc protocol processing.
Optionally, in order to improve reliability, the lower network element of described generation business datum packet loss can send the first above-mentioned chain of command message to a plurality of its adjacent lower network element.Like this, only wherein any one adjacent lower network element is returned the described second chain of command message and can be finished described processing according to described restoration methods of the present invention; Perhaps, the lower network element of described generation business datum packet loss comprehensive a plurality of or all the business datum package informatin of losing that returns by the described second chain of command message of adjacent lower network element finish described processing.
Based on above-mentioned method, as shown in Figure 5, shown a kind of network system of the present invention.This network system comprises a upper strata network element and some lower network element (1～N).
In described some lower network element, comprise the lower network element that the business datum packet loss takes place, and the adjacent one or more lower network element of lower network element of business datum packet loss take place, hereinafter referred to as adjacent lower network element with this.
The lower network element of described generation business datum packet loss comprises:
Detection module is used to judge whether to occur losing of or continuous a plurality of business data packet;
The first key-course message transmission module is used for generating the first key-course message that is used to obtain the described business datum package informatin of losing when the business datum packet loss takes place, and the first key-course message is sent to adjacent lower network element.
Described adjacent lower network element comprises:
The first key-course message sink module is used to receive the first key-course message from the lower network element of described generation business datum packet loss;
The business data packet retrieval module is used for describedly judging according to the first key-course message retrieval whether this adjacent lower network element has the information of described business data packet of losing;
The second key-course message transmission module, when the business data packet retrieval module retrieves the information of described business data packet of losing, requirement according to the described first key-course message generates the second key-course message, and the information of carrying described business data packet of losing sends to the lower network element of described generation business datum packet loss.Wherein, if total business data packet number of a synchronizing sequence of request or total business datum length information in the described first chain of command message, then described adjacent lower network element is carried total business data packet number information of described synchronizing sequence in the second chain of command message, optionally, the total business datum length information that also comprises described synchronizing sequence.
The lower network element of described generation business datum packet loss also comprises:
The second key-course message sink module is used to receive the second key-course message from adjacent lower network element;
Recover processing module synchronously, be used for, recover synchronously to handle according to the described business datum package informatin of losing that obtains from the described second key-course message.
Wherein, described synchronous recovery processing module is recovered to handle according to the length of the business data packet of carrying in the described second chain of command message synchronously.Concrete, described synchronous recovery processing module can obtain the length of its each business data packet of losing, should recover synchronously processing module like this can calculate each business datum of losing wrap in the size in space of the RLC PDU that rlc protocol occupies in handling and the position that occupies in RLC PDU, the processing (mute) thereby the lower network element of this generation business datum packet loss can be mourned in silence does not just send at wave point and comprises the TTI that these lose business datum.And can continue to send the business data packet that correctly receives after the business data packet of losing, and can not destroy the lower network element of this generation business datum packet loss and the synchronized transmission between other network element.
Embodiment 1:
The lower network element that the business datum packet loss takes place is in the SYNC protocol processes, and the sequence number that detects synchronizing sequence X is N, N+1, and the business datum packet loss of N+2, then:
The lower network element of described generation business datum packet loss sends the first chain of command message to its adjacent lower network element, carry in the described first chain of command message: the sequence number information of the timestamp information of service identification information, described synchronizing sequence and the described packet of losing, the indicating means of concrete sequence number information can have following several mode:
● one group of sequence number information, carry N as the first chain of command message, N+1, these three sequence numbers of N+2, the packet of losing with indication.
● the start-stop sequence number information of the business data packet of losing, in this example, for (N, N+2).Wherein the homing sequence of lost data packets number is N, and end sequence number is N+2.
● the homing sequence of the packet of losing number adds persistence length, in this example, is (N, 3), and wherein homing sequence number is N, and the number of lost data packets is 3 (they being persistence length).
Described adjacent lower network element is judged when the business datum package informatin of losing is arranged oneself, lower network element to described generation business datum packet loss sends the second chain of command message, and this second chain of command message comprises following information: the length of each business data packet that identifies in the described first chain of command message.
In this embodiment one, concrete information can be a kind of in the following mode:
Sequence of data packet of losing number and corresponding length information, concrete, the sequence number N of synchronizing sequence X, N+1, the length of N+2 and corresponding business data packet.
Packet start-stop sequence number of losing and corresponding length of data package, concrete, the start-stop sequence number is that (N, N+2), and packet N is to the length of packet N+2.
The homing sequence of the packet of losing number and persistence length and corresponding length of data package, in this example, the initial data packet length is N, persistence length is 3, and packet N is to the length of packet N+2.
If described adjacent lower network element does not have the length of packet N to the partial data bag of N+2, N+1 for example, then:
In the second chain of command message, the length mark of described packet N+1 is 0; Or, in the second chain of command message, do not carry sequence number or its length information of packet N+1.Concrete, in the second chain of command message, only carry sequence number information and the length of packet N and N+2.
Optionally, if described adjacent lower network element does not have the whole packet data length of packet N to N+2, then described adjacent lower network element is not returned the second chain of command message.
It is N that the lower network element of described generation business datum packet loss receives above-mentioned sequence number, N+1, the length of the business data packet of N+2, packet that can constructing virtual is handled, the length of described virtual data pack is consistent with the real adjacent data packet length of losing that lower network element obtained, can calculate concrete expense and length that these packets of losing take like this in RLC handles, comprise the RLC header overhead, LI, the more specific location information of each packet in RLC PDU etc.
If the lower network element that data-bag lost takes place obtains the length of data package of partial loss by the described second chain of command message, and continuous packet in the non-synchronizing sequence of the packet of unknown lengths, then lower network element can be known the length of data package of single unknown lengths according to the SYNC agreement.
For example, the length of packet N and N+2 is known by said process, the synchronizing information of carrying then according to the SYNC agreement, and lower network element is the length of N+1 as can be known.
Concrete, the length of packet N+1 equals the cumulative data packet length that packet N+2 carries and deducts the cumulative data packet length that packet N carries.
Like this, the lower network element of described generation business datum packet loss just can according to the length that occupies and the position of these virtual data pack mourn in silence (Mute) handle, concrete, the TTI that comprises described packet segmentation is not sent at wave point, and the TTI that does not comprise these virtual data bags is sent normally.
Embodiment two:
The lower network element that the business datum packet loss takes place is in the SYNC protocol processes, detect the control frame (frame of the type 0 in the corresponding SYNC agreement of the SYNC agreement of not receiving certain synchronizing sequence, this control frame carries the total length and the total number of packet of synchronizing sequence), at this moment, the lower network element of this generation business datum packet loss can not be known the total data bag number and the data length of this synchronizing sequence, and whether there is data-bag lost after can not being informed in its business data packet that correctly receives, the lower network element that the business datum packet loss for example takes place does not receive the SYNC control frame of synchronizing sequence X, and the sequence number of last packet of the synchronizing sequence X that it receives is N.The sequence number of last packet of this synchronizing sequence be M then:
The lower network element of described generation business datum packet loss sends the first chain of command message to its adjacent lower network element, and this first chain of command message carries: the timestamp information of service identification information, described synchronizing sequence, also comprise following information one or more:
● the total number of the packet of this synchronizing sequence of indication request;
● the total length of data packets of this synchronizing sequence of indication request;
● indicate the sequence number N of last business data packet of the described synchronizing sequence that this network element receives.
Described adjacent lower network element sends the second chain of command message to the lower network element of described generation business datum packet loss, and this second chain of command message comprises a kind of of following information or their combination:
● the business data packet sum of this synchronizing sequence;
● the business data packet total length of this synchronizing sequence;
● this synchronizing sequence begin part or all of length of data package from sequence number N+1 to this last packet of sequence; Concrete, last sequence of data packet of this synchronizing sequence number is M, and then the second chain of command message is carried a kind of of following message:
(1) packet start-stop sequence number and corresponding length of data package, concrete, the start-stop sequence number is that (N+1, M), and packet M+1 is to the length of packet M.
The homing sequence of the packet of (2) losing number and persistence length and corresponding length of data package, in this example, the initial data packet number is N+1, persistence length is 10, and packet N is to the length of packet N+10.
(3) if described adjacent lower network element does not have the length of packet N to the partial data bag of packet M, N+2 for example, then:
In the second chain of command message, the length mark of described packet N+2 is 0; Or, in the second chain of command message, do not carry sequence number and/or its length information of packet N+2, concrete, in the second chain of command message, only carried packet N+1 and N+3 sequence number information and corresponding data packet length to M;
(4) optional, if described adjacent lower network element does not have the whole packet data length of packet N+1 to M, then described adjacent lower network element is not returned the second chain of command message.
● if the sequence number of last packet of this synchronizing sequence is N, and then the second chain of command message information of carrying indicates the lower network element that the business datum packet loss takes place not lose business data packet; Concrete, can show to indicate by information bit in the second chain of command message does not have losing of business data packet.Or the number of the packet that can lose by indication in the second chain of command message is 0 to represent.
The lower network element of described generation business datum packet loss receives the second key-course message that adjacent lower network element is returned, know the wherein total number of business data packet, whether the afterbody that can know a synchronizing sequence exists packet loss, if and had packet loss, further could also know the length of data package and the number of losing.
Then, the lower network element of described generation business datum packet loss can be according to the above-mentioned information of obtaining from the described second chain of command message, the packet of constructing virtual is handled, the length of described virtual data pack is consistent with real adjacent data packet length that lower network element obtains, can calculate concrete expense and length that these packets take like this in RLC handles, comprise the RLC header overhead, LI, the more specific location information of each packet in RLC PDU etc.
If the lower network element that data-bag lost takes place obtains the length of data package of partial loss by the described second chain of command message, and continuous packet in the non-synchronizing sequence of the packet of unknown lengths, then lower network element can be known the length of data package of single unknown lengths according to the SYNC agreement.
Like this, the lower network element that the business datum packet loss takes place just can be according to (Mute) processing of mourning in silence of the length that occupies and the position of these virtual data pack, concrete, the TTI that comprises described packet segmentation is not sent at wave point, and the TTI that does not comprise these virtual data bags is sent normally.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (22)
1. the method for the synchronous recovery of a multimedia broadcast-multicast service is characterized in that, comprises the steps:
Steps A: the lower network element of business datum packet loss takes place, send the request message that obtains the described business datum package informatin of losing to adjacent lower network element;
Step B: described adjacent lower network element is fed back the information of described business data packet of losing to the lower network element of described generation business datum packet loss.
2. the method for synchronous recovery as claimed in claim 1 is characterized in that, described method also comprises:
Step C: the lower network element of described generation business datum packet loss is recovered to handle according to the described business datum package informatin of losing that obtains synchronously.
3. the method for synchronous recovery as claimed in claim 1 or 2 is characterized in that,
In steps A, the lower network element of business datum packet loss takes place, when the losing of one or continuous a plurality of business data packet judge occurring, send a request message to the one or more lower network element that are adjacent, described request message is the first chain of command message of the described business datum package informatin of losing of acquisition request.
4. the method for synchronous recovery as claimed in claim 3 is characterized in that,
The information that the described first chain of command message is carried comprises: the synchronizing sequence sign.
5. the method for synchronous recovery as claimed in claim 4 is characterized in that,
The information that the described first chain of command message is carried also comprises: the sequence number information of the packet of indication request or the information of a synchronizing sequence total length of indication request or their combination.
6. the method for synchronous recovery as claimed in claim 5 is characterized in that,
The sequence number information of the packet of described indication request is the sequence number of one group of packet; Or one group id lose business data packet play/end the information of sequence number; Or the information of the homing sequence of a group id packet number and persistence length; Or last sequence of data packet information of receiving of described lower network element, this moment, the packet of described request was a packet after last data that receives described in the described synchronizing sequence.
7. the method for synchronous recovery as claimed in claim 5 is characterized in that,
The information that the described first chain of command message is carried further comprises: the information of the total business data packet number of indication request.
8. the method for synchronous recovery as claimed in claim 3 is characterized in that,
In step B, if described adjacent lower network element has the information of described business data packet of losing, then the lower network element to described generation business datum packet loss sends the second chain of command message, and the described second chain of command message is carried following information:
Length information by the indicated part or all of business data packet of the entrained information of the first chain of command message.
9. the method for synchronous recovery as claimed in claim 8 is characterized in that, the length information of the part or all of business data packet that the described second chain of command message is carried comprises following information:
Indicate the sequence number and the corresponding length of data package of described packet;
Or, indicate the beginning sequence number of one group of continuous data bag and end sequence number, and indicate pairing length of data package;
Or, indicate the beginning sequence number and the number of one group of continuous data bag, and indicate corresponding length of data package;
Or when described adjacent network element did not have the information of part or all of described business data packet of losing, the length of indicating described business data packet of losing was particular value or the sequence number that does not carry described business data packet of losing/or length information.
10. the method for synchronous recovery as claimed in claim 9, it is characterized in that, if the lower network element of described generation business datum packet loss, total business data packet number of a synchronizing sequence of request and/or total business datum length information in the described first chain of command message, the described second chain of command message is further also carried following information:
Total business data packet number information of described synchronizing sequence, and/or total business datum length information of described synchronizing sequence.
11. the method for synchronous recovery as claimed in claim 8 is characterized in that,
In step C, the lower network element of described generation business datum packet loss is according to the length of the business data packet of carrying in the described second chain of command message, and the business datum that obtains losing wraps in the size and the position in the space of the wireless link control protocol data cell (RLC PDU) that occupies in Radio Link control (RLC) protocol processes.
12. the method for synchronous recovery as claimed in claim 11 is characterized in that,
In step C, the lower network element of described generation business datum packet loss is according to the length from the business data packet of carrying in a plurality of described second chain of command message, comprehensive a plurality of or all adjacent lower network element return the described business datum package informatin of losing recover synchronously to handle.
13. the network system of the synchronous recovery of a multimedia broadcast-multicast service is characterized in that, comprises a upper strata network element and some lower network element 1～N; In described some lower network element, comprise the lower network element that the business datum packet loss takes place, and with these adjacent one or more lower network element of lower network element that business datum packet loss takes place, be called adjacent lower network element; Wherein,
The lower network element of described generation business datum packet loss is used for sending the request message that obtains the described business datum package informatin of losing to one or more adjacent lower network element; Described adjacent lower network element is used for when the information of described business data packet of losing is arranged, and then feeds back the described business datum package informatin of losing to the lower network element of described generation business datum packet loss.
14. network system as claimed in claim 13 is characterized in that,
The lower network element of described generation business datum packet loss is further used for recovering synchronously to handle according to the described business datum package informatin of losing that obtains.
15. network system as claimed in claim 14 is characterized in that, the lower network element of described generation business datum packet loss comprises:
Detection module is used to judge whether to occur losing of or continuous a plurality of business data packet;
The first key-course message transmission module, be used for when the business datum packet loss takes place, generation is used to obtain the first key-course message of the described business datum package informatin of losing, and the first key-course message is sent to adjacent lower network element, and described request message is the first key-course message;
The second key-course message sink module, be used to receive the second key-course message from adjacent lower network element, the described second key-course message carries the described business datum package informatin lost of adjacent lower network element to the lower network element feedback of described generation business datum packet loss;
Recover processing module synchronously, be used for, recover synchronously to handle according to the described business datum package informatin of losing that obtains from the described second key-course message.
16. network system as claimed in claim 15 is characterized in that, described adjacent lower network element comprises:
The first key-course message sink module is used to receive the first key-course message from the lower network element of described generation business datum packet loss;
The business data packet retrieval module is used for describedly judging according to the first key-course message retrieval whether this adjacent lower network element has the information of described business data packet of losing;
The second key-course message transmission module, when the business data packet retrieval module retrieves the information of part or all of described business data packet of losing, requirement according to the described first key-course message generates the second key-course message, and the information of carrying part or all of described business data packet of losing sends to the lower network element of described generation business datum packet loss.
17. as claim 15 or 16 described network systems, it is characterized in that,
The information that the described first chain of command message is carried comprises: the synchronizing sequence sign; Further comprise: the information of the sequence number information of the packet of indication request or a synchronizing sequence total length of indication request or the information of the total business data packet number of indication request or their combination.
18. network system as claimed in claim 17 is characterized in that,
The sequence number information of the packet of described indication request is the sequence number of one group of packet; Or one group id lose business data packet play/end the information of sequence number; Or the information of the homing sequence of a group id packet number and persistence length; Or last sequence of data packet information of receiving of described lower network element, this moment, the packet of described request was a packet after last data that receives described in the described synchronizing sequence.
19. network system as claimed in claim 17 is characterized in that,
The described second chain of command message is carried following information: by the length information of the indicated part or all of business data packet of the entrained information of the first chain of command message.
20. network system as claimed in claim 19 is characterized in that, the length information of the part or all of business data packet that the described second chain of command message is carried comprises following information:
Indicate the sequence number and the corresponding length of data package of described packet;
Or, indicate the beginning sequence number of one group of continuous data bag and end sequence number, and indicate pairing length of data package;
Or, indicate the beginning sequence number and the number of one group of continuous data bag, and indicate corresponding length of data package;
Or when described adjacent network element did not have the information of part or all of described business data packet of losing, the length of indicating described business data packet of losing was particular value or sequence number and/or the length information that does not carry described business data packet of losing.
21. network system as claimed in claim 20, it is characterized in that, if the lower network element of described generation business datum packet loss, total business data packet number of a synchronizing sequence of request and/or total business datum length information in the described first chain of command message, the described second chain of command message is further also carried following information:
Total business data packet number information of described synchronizing sequence, and/or total business datum length information of described synchronizing sequence.
22. network system as claimed in claim 16 is characterized in that,
Described synchronous recovery processing module, length according to the business data packet of carrying in the described second chain of command message, dispatch when handling, obtain the length of its each business data packet of losing, calculate the size that each business datum of losing wraps in the space of the wireless link control protocol data cell (RLC PDU) that occupies in Radio Link control (RLC) protocol processes.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190519A1 (en) * | 2013-05-30 | 2014-12-04 | 华为技术有限公司 | Method, device and system for transmitting service message |
| WO2015154523A1 (en) * | 2014-09-03 | 2015-10-15 | 中兴通讯股份有限公司 | Lost data recovery processing method and device |
| WO2021142646A1 (en) * | 2020-01-15 | 2021-07-22 | Oppo广东移动通信有限公司 | Method and device for service transmission, and communication device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070242683A1 (en) * | 2006-04-12 | 2007-10-18 | Ghyslain Pelletier | Plural telecommunications functions having sharing transaction(s) |
| US20080130580A1 (en) * | 2006-12-04 | 2008-06-05 | Qualcomm Incorporated | METHODS AND APPARATUS FOR TRANSFERRING A MOBILE DEVICE FROM A SOURCE eNB TO A TARGET eNB |
| CN101247315A (en) * | 2007-02-12 | 2008-08-20 | 上海贝尔阿尔卡特股份有限公司 | Content synchronization method and apparatus for single-frequency network transmission |
-
2009
- 2009-09-29 CN CN2009101797335A patent/CN102036176A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070242683A1 (en) * | 2006-04-12 | 2007-10-18 | Ghyslain Pelletier | Plural telecommunications functions having sharing transaction(s) |
| US20080130580A1 (en) * | 2006-12-04 | 2008-06-05 | Qualcomm Incorporated | METHODS AND APPARATUS FOR TRANSFERRING A MOBILE DEVICE FROM A SOURCE eNB TO A TARGET eNB |
| CN101247315A (en) * | 2007-02-12 | 2008-08-20 | 上海贝尔阿尔卡特股份有限公司 | Content synchronization method and apparatus for single-frequency network transmission |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190519A1 (en) * | 2013-05-30 | 2014-12-04 | 华为技术有限公司 | Method, device and system for transmitting service message |
| CN104335515B (en) * | 2013-05-30 | 2017-11-24 | 华为技术有限公司 | The method, apparatus and system of service message transmission |
| WO2015154523A1 (en) * | 2014-09-03 | 2015-10-15 | 中兴通讯股份有限公司 | Lost data recovery processing method and device |
| CN105450356A (en) * | 2014-09-03 | 2016-03-30 | 中兴通讯股份有限公司 | Lost data recovery processing method and device |
| CN105450356B (en) * | 2014-09-03 | 2019-10-11 | 中兴通讯股份有限公司 | Lose the recovery processing method and processing device of data |
| WO2021142646A1 (en) * | 2020-01-15 | 2021-07-22 | Oppo广东移动通信有限公司 | Method and device for service transmission, and communication device |
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