CN101316162B - Method for implementing contents synchronization, client terminal equipment and server terminal equipment - Google Patents
Method for implementing contents synchronization, client terminal equipment and server terminal equipment Download PDFInfo
- Publication number
- CN101316162B CN101316162B CN2007101059229A CN200710105922A CN101316162B CN 101316162 B CN101316162 B CN 101316162B CN 2007101059229 A CN2007101059229 A CN 2007101059229A CN 200710105922 A CN200710105922 A CN 200710105922A CN 101316162 B CN101316162 B CN 101316162B
- Authority
- CN
- China
- Prior art keywords
- timing relationship
- client
- packet
- adjustment amount
- server end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 241000209094 Oryza Species 0.000 claims description 96
- 235000007164 Oryza sativa Nutrition 0.000 claims description 96
- 235000021186 dishes Nutrition 0.000 claims description 96
- 235000009566 rice Nutrition 0.000 claims description 96
- 230000007087 memory ability Effects 0.000 claims description 26
- 230000004044 response Effects 0.000 claims description 10
- 230000003139 buffering effect Effects 0.000 claims description 8
- 230000011664 signaling Effects 0.000 claims description 8
- 238000013316 zoning Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- OJOWICOBYCXEKR-KRXBUXKQSA-N (5e)-5-ethylidenebicyclo[2.2.1]hept-2-ene Chemical compound C1C2C(=C/C)/CC1C=C2 OJOWICOBYCXEKR-KRXBUXKQSA-N 0.000 description 50
- 239000003550 marker Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 230000015654 memory Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 241000760358 Enodes Species 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a method for realizing the synchronization of contents. During the application of the method, when a client terminal detects the contents are out of synchronization, a self-demanding timing relation regulation volume is transmitted to a server side; the server side informs other client terminals in the content synchronization area in which the client terminal is positioned to transmit self-demanding timing relation regulation volumes after receiving the timing relation regulation volume. The server side determines the new timing relations according to the received timing relation regulation volumes transmitted by each client terminal and feeds back the new timing relations to the client terminals. The invention also discloses client terminal equipment and server side equipment for realizing the synchronization of contents. By regulating the timing relation in time, the invention can guarantee the synchronization of the data package content when the service is initiated and when the time lag fluctuation of the network transmission is relatively high.
Description
Technical field
The present invention relates to the synchronization mechanism technology, particularly relate to a kind of method and client device and server end equipment of realizing content synchronization.
Background technology
Multicast/broadcast business (MBMS) need promptly carry the sub-district at a plurality of distribution nodes to the carrying identical services and coordinate as a kind of bearer network of multicast/broadcast business, and the coordination system comprises that time synchronized, content synchronization and scheduling are synchronous.Wherein, content synchronization is meant that certain coordination system can be passed through in all carrying sub-districts, issues same packet in the identical time.The residing sub-district of each client that needs to realize content synchronization is called MBMS content synchronization district.
With Long Term Evolution (LTE) network is example, at present, the content synchronization agreement is a SYNC agreement regulation, in order to realize content synchronization, when business is initiated, set up frame number (SN, Sequence Number) with eat dishes without rice or wine the SN timing relationship of (air interface) transmitting time (send time) T, in the carrying sub-district, all evolution base stations (eNode B, or abbreviate eNB as) all set up the SN timing relationship with the transmitting time T that eats dishes without rice or wine identical SN number, for example: the service rate R of MBMS is 128 kilobytes per seconds (kbps), the transmitting time that the packet of SN=0 (or being expressed as the SN_0 packet) is corresponding is called T (SN_0)=T
0Second, so, the transmitting time that the packet of SN=256 (or being expressed as the SN_x packet) is corresponding is called T (SN_256)=T
0+ (SN number/R)=T
0+ (256/128000)=T
0+ 0.002 second etc.; Have SN number in the transfer of data between eNB and gateway (AGW),, send according to the identical transmitting time of eating dishes without rice or wine for identical SN number packet to guarantee among the different e NB.
Above-mentioned SYNC agreement regulation in case the SN timing relationship is set up, even data source does not have data to send, also will add up by predefined timing relationship for SN number; And for the situation of packet packet loss, each sub-district can be by calculating SN numbers that wrap lost data packets front and back two, calculate the size of lost package, and calculate the transmitting time of eating dishes without rice or wine of lost data packets according to the timing relationship of the transmitting time T of the packet of losing, in order to guarantee the MBMS content synchronization, the eNB of lost data packets can not send any data in the transmitting time of eating dishes without rice or wine of the packet correspondence of losing.
And when the network transfer delay fluctuation is big, if SN_x packet as shown in Figure 1a arrives the buffer memory ability that the time of eNB has exceeded eNB in advance, perhaps the SN_x packet shown in Fig. 1 b lags behind and arrives eNB, all need existing SN number among the eNB is adjusted with the timing relationship of the transmitting time T that eats dishes without rice or wine, to guarantee the content synchronization of follow-up MBMS packet.When having exceeded the buffer memory ability of eNB such as the time that arrives eNB when the generation packet in advance, eNB need adjust timing relationship backward; When packet hysteresis arrival eNB took place, eNB need adjust timing relationship forward.And existing SYNC agreement is at the SN number adjustment mechanism with the timing relationship of the transmitting time T that eats dishes without rice or wine, thereby, can not guarantee the content synchronization of MBMS packet.In addition, when business was initiated, existing SYNC agreement did not provide the adjustment mechanism with the timing relationship of the transmitting time T that eats dishes without rice or wine SN number yet.
Summary of the invention
The object of the present invention is to provide a kind of method, system and client and server end of realizing content synchronization, can guarantee the content synchronization of packet.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method that realizes content synchronization, this method comprises:
Client detects content when asynchronous, sends the timing relationship adjustment amount that self needs to server end;
Server end notifies other client in the content synchronization district at this client place to send the timing relationship adjustment amount that self needs after receiving described timing relationship adjustment amount;
Server end is determined new timing relationship according to the timing relationship adjustment amount that each client that receives sends, and determined new timing relationship is returned described each client.
In the embodiment of the invention, determine that new timing relationship is: from each timing relationship adjustment amount, choose maximum, as timing relationship.
When client detects content when asynchronous, further comprise: described user end to server end end sends the buffer memory ability of self.
In the embodiment of the invention, determine that new timing relationship is: from each timing relationship adjustment amount, choose maximum value as maximum timing relationship adjustment amount;
For each client, at maximum timing relationship adjustment amount during less than its timing relationship adjustment amount and buffer memory ability sum, with described maximum timing relationship adjustment amount as timing relationship;
In described client, when having maximum timing relationship adjustment amount greater than separately timing relationship adjustment amount and buffer memory ability sum, with described maximum timing relationship adjustment amount as satisfying the timing relationship of maximum timing relationship adjustment amount less than the client of timing relationship adjustment amount and buffer memory ability sum; Remaining client is formed new set and is redefined maximum timing relationship adjustment amount, redefines timing relationship until all clients.
This method also comprises: set in advance the packet sending threshold value;
Describedly from each timing relationship adjustment amount, choose after the maximum, further comprise:
In the difference of the mean value of described maximum and described each timing relationship adjustment amount during greater than the packet sending threshold value, perhaps, in the difference of described maximum and the mean value of residue timing relationship adjustment amount except that the timing relationship adjustment amount of described maximum clients corresponding during greater than the packet sending threshold value, described server end stops to send the follow-up data bag to the timing relationship adjustment amount clients corresponding of this maximum of selecting, or indicates stop the to eat dishes without rice or wine transmission of packet of this client;
Remaining client is formed new set and is redefined maximum timing relationship adjustment amount, and continue in the residue set, to choose maximum, difference up to the mean value of described maximum and described each timing relationship adjustment amount is less than or equal to preset data bag sending threshold value, and perhaps described maximum is less than or equal to the packet sending threshold value with the difference of the mean value of residue timing relationship adjustment amount except that the timing relationship adjustment amount of described maximum clients corresponding.
Set in advance client system threshold; Number clients in described new set is during less than client system threshold, and the client that described server end stops in this set sends the follow-up data bag, or indicates stop the to eat dishes without rice or wine transmission of packet of the interior client of this set.
In the embodiment of the invention, the timing relationship adjustment amount is absolute time or relative time.
Described absolute time is that frame number is the new transmitting time of eating dishes without rice or wine of 0 packet SN_0, perhaps, and the binary crelation group that the transmitting time of newly eating dishes without rice or wine of the frame number x of the SN_x packet of arrival and SN_x packet is formed.
Described relative time is newly the eat dishes without rice or wine transmitting time and the difference of the old transmitting time of eating dishes without rice or wine of SN_0 packet as content synchronization value of feedback last time of SN_0 packet.Perhaps, newly the eat dishes without rice or wine transmitting time and the binary crelation group formed of the difference of the old transmitting time of eating dishes without rice or wine of SN_x packet of the frame number x of the packet of arrival and SN_x packet as content synchronization value of feedback last time.
Client detect content asynchronous before, further comprise: the surplus relevant with the transmission delay of eating dishes without rice or wine is set;
In the embodiment of the invention, the new SN_0 packet transmitting time of eating dishes without rice or wine is: the time of reception of the current packet that receives of described client, with SN number of the current packet that receives difference with the merchant of MBMS service rate R; Perhaps, the time of reception of the current packet that receives of described client and surplus sum are with SN number of the current packet that the receives difference with the merchant of service rate R.
The new SN_x packet transmitting time of eating dishes without rice or wine is: the time of reception of the current packet SN_x that receives of described client; Perhaps, time of reception and the surplus sum of the current packet SN_x that receives of described client;
Described client detect content asynchronous before, further comprise: described server end sends the SN_0 packet to each client;
Described each client with SN_0 packet time of advent as the timing relationship adjustment amount, send the timing relationship adjustment amount that self needs to server end respectively; Server end is determined the new timing relationship in the content synchronization district and is returned each client.
The described new timing relationship that will determine returns to each client and is: server end returns the signaling of the content synchronization response that carries described new timing relationship to each client, or described server end is carried on described new timing relationship in the follow-up data bag, issues to each client.
When the content synchronization district was MBMS content synchronization district,, further comprise when server end sends the timing relationship adjustment amount described: each user end to server end sent the MBMS service marker;
When the described new timing relationship that will determine returned each client, further comprise: server end returned the MBMS service marker to each client.
In the embodiment of the invention, when the user end to server end sends the timing relationship adjustment amount, further comprise: each user end to server end sends SN number;
When the described new timing relationship that will determine returns each client, further comprise: server end returns SN number to each client.
In the embodiment of the invention, described content synchronization district is MBMS content synchronization district; Before described server end was determined new timing relationship, this method also comprised:
Described server end is the sub-district that described MBMS content synchronization zoning is divided into main synchronization zone and the arrivals/buffering area that take place to lag behind overflows, and in main synchronization zone with take place between the sub-district that hysteresis arrival/buffering area overflows boundary belt to be set;
Described server end is determined new timing relationship separately at different zones respectively and is sent to client in corresponding each zone.
In order to realize at SN number adjustment mechanism with the timing relationship of the transmitting time T that eats dishes without rice or wine, the present invention detects meaningful when asynchronous in client, each client in the MBMS content synchronization district feeds back to server end with self according to buffer memory ability and packet definite timing relationship adjustment amount time of advent respectively, server end is according to the timing relationship adjustment amount of each client feedback, redefine the timing relationship of each client of MBMS content synchronization district, and feed back to each client; And each client sends the follow-up data bag according to the transmitting time of eating dishes without rice or wine of new timing relationship adjustment follow-up data bag.The present invention is by to the SN number timely adjustment with the timing relationship of the transmitting time T that eats dishes without rice or wine, when having guaranteed professional initiation and network transfer delay fluctuation when big, and the content synchronization of MBMS packet.
Description of drawings
To make clearer above-mentioned and other feature and advantage of the present invention of those of ordinary skill in the art by describe exemplary embodiment of the present invention in detail with reference to accompanying drawing below, in the accompanying drawing:
Fig. 1 a is the schematic diagram that exceeds time that the SN_x packet arrives eNB in advance the buffer memory ability of eNB;
Fig. 1 b is the schematic diagram that the hysteresis of SN_x packet arrives eNB;
Fig. 2 is the flow chart that the present invention realizes the method for content synchronization;
Fig. 3 is a flow chart of realizing the method for content synchronization in the embodiment of the invention one;
Fig. 4 a is among the embodiment one, and initial content synch command or SN_0 packet arrive the schematic diagram of eNB;
Fig. 4 b is among the embodiment one, and the initial content synch command of different e NB feedback arrives the schematic diagram of the transmitting time of eating dishes without rice or wine of eNB or SN_0 packet in the carrying sub-district;
Fig. 4 c is among the embodiment one, generates the schematic diagram of a plurality of feedback time set;
Fig. 5 is a flow chart of realizing the method for content synchronization in the embodiment of the invention two;
Fig. 6 is a flow chart of realizing the method for content synchronization in the embodiment of the invention three;
Fig. 7 is a flow chart of realizing the method for content synchronization in the embodiment of the invention four;
Fig. 8 a is that schematic diagram is divided in the sub-district of the present invention embodiment five of realizing content synchronization;
Fig. 8 b is a schematic flow sheet of realizing the method for content synchronization in the embodiment of the invention five;
Fig. 9 realizes the structural representation of the system of content synchronization for the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Among the present invention, the SYNC agreement adopts the tree of many SYNC client (Client)-single SYNC server end (Server) to carry out content synchronization, abbreviates the SYNC client as client herein, abbreviates the SYNC server end as server end.Client can be any node in subscriber equipment (UE) or the Access Network, as eNB, NodeB or radio network controller; Server end can be MBMS controller or the interior arbitrary network node of core net in content server end, the Access Network.Be that MBMS content synchronization district is an example with the content synchronization district below, introduce the present invention program's realization.
Fig. 2 is the flow chart that the present invention realizes the method for content synchronization, as described in Figure 2, may further comprise the steps:
Step 200: detect content when asynchronous as client, each client sends the timing relationship adjustment amount that self needs to server end respectively.
After the process content synchronization in the initial moment, establish the SN timing relationship with the transmitting time T that eats dishes without rice or wine in the client in advance SN number, therefore for the transmitting time of eating dishes without rice or wine of certain SN_0 packet, client is to know the transmitting time of eating dishes without rice or wine of SN_x packet, when the buffer memory ability that time that the SN_x packet arrives eNB has in advance exceeded eNB occurring, perhaps lag behind to arrive eNB be when being later than time that the SN_x packet arrives eNB situation such as predefined transmitting time to the SN_x packet, client is to judge whether needs are adjusted timing relationship according to the concrete time of advent and existing SN timing relationship, this point belongs to technology as well known to those skilled in the art, is not described in detail here.In this step, when user end to server sent the timing relationship adjustment amount, other client in the server end meeting content of announcement synchronization zone sent the timing relationship adjustment amount that self needs.
In this step, client is determined to adopt T herein by the timing relationship adjustment amount according to packet the time of advent
ENB (i)The timing relationship adjustment amount of representing i eNB, timing relationship adjustment amount can be absolute times, the promptly new SN_0 packet transmitting time of eating dishes without rice or wine; It also can be relative time, it is new SN_0 packet the eat dishes without rice or wine difference of transmitting time of transmitting time and old SN_0 packet of eating dishes without rice or wine, the wherein old SN_0 packet transmitting time of eating dishes without rice or wine is the value of feedback of content synchronization last time, and new SN_0 packet is eated dishes without rice or wine, and to be client determine according to self needs transmitting time.Eat dishes without rice or wine definite method of transmitting time of new SN_0 is:
Suppose to adopt T
Receive (i), xThe time of reception of representing the SN_x packet of i eNB, the so new SN_x packet transmitting time of eating dishes without rice or wine can be T
Receiver (i), x, perhaps T
Receiver (i), x+ surplus, the new SN_0 packet transmitting time of eating dishes without rice or wine can be T
Receiver (i), x-(x/R), perhaps (T
Receiver (i), x+ surplus)-(x/R).Wherein surplus is a Configuration Values relevant with the transmission delay of eating dishes without rice or wine that sets in advance.
In this step, client also can be according to SN number of the packet of determining packet time of advent the to arrive binary crelation group with the timing relationship adjustment amount.At this moment, the absolute value of timing relationship adjustment amount is the binary crelation group of frame number x with the transmitting time composition of newly eating dishes without rice or wine of SN_x packet of the packet that arrives; The relative value of timing relationship adjustment amount is newly the eat dishes without rice or wine transmitting time and the binary crelation group formed of the difference of the old transmitting time of eating dishes without rice or wine of SN_x packet as content synchronization value of feedback last time of the frame number x of the packet that arrives and SN_x packet.
The trigger mechanism of this step comprises: when the fluctuation of professional initial time trigger, network transfer delay is big such as the MBMS packet in advance or lag behind and arrive eNB, Event triggered or regularly trigger etc.
Further, client can also send to server end with the buffer memory ability of self.
Step 201: server end is determined the new timing relationship in the MBMS content synchronization district and is returned each client.
This step adopts maximum transmitted time delay estimation approach to determine new timing relationship, and specific implementation comprises:
If client is only fed back T
ENB (i), then server end can be from each T
ENB (i)In to choose a maximum value be Max (T
ENB (i)) be that timing relationship (only feeds back T in client as the transmitting time of eating dishes without rice or wine of the current data packet in the sub-district that redefines
ENB (i)Situation under, buffer memory ability C
Buffer, i(adopt C herein
Buffer, iThe buffer memory ability of representing i eNB) is a predefined constant); Further, if Max is (T
ENB (i))-mean (T
ENB (i)Being used to of)＞default judged the packet sending threshold value that whether sends packet to client, then deletes Max (T
ENB (i)), server end does not send the follow-up data bag to deleted eNB (j), or indicates it to stop the transmission of packet of eating dishes without rice or wine, and continues to choose maximum in the residue set, up to Max (T
ENB (i))-mean (T
ENB (i))＜=preset data bag sending threshold value.Deleted Max (T
ENB (i)) corresponding eNB (j) keeps mourning in silence eating dishes without rice or wine, and do not send the data of this MBMS business.Wherein, mean (T
ENB (i)) be the T of each client feedback
ENB (i)Mean value or remove Max (T
ENB (i)) T of outer other client feedback
ENB (i)Mean value.
If client is fed back T simultaneously
ENB (i)With buffer memory ability C
Buffer, iThe time,
If to each client, Max (T is arranged all
ENB (i))＜T
ENB (i)+ C
Buffer, i, then with Max (T
ENB (i)) be timing relationship as the transmitting time of eating dishes without rice or wine of the current data packet in the sub-district that redefines.Wherein, Max (T
ENB (i)) be client with maximum transmitted time delay;
If exist the feedback of client to satisfy Max (T
ENB (i))＞T
ENB (i)+ C
Buffer, i, that is: if with Max (T
ENB (i)) as the transmitting time of eating dishes without rice or wine of current data packet, then have client that the situation that buffer memory overflows can take place, at this moment, all are satisfied Max (T
ENB (i))＜T
ENB (i)+ C
Buffer, iClient form a set, server end is with Max (T
ENB (i)) be timing relationship as the transmitting time of eating dishes without rice or wine of SN_0 that redefines in this set or current SN_x packet; Remaining client is formed a new set, if the client of being somebody's turn to do in the new set all satisfies Max (T
ENB (j)) (the maximum feedback value in the new set)＜T
ENB (j)+ C
Buffer, j, then with Max (T
ENB (j)) be timing relationship as the SN_0 that redefines in the new set or the transmitting time of eating dishes without rice or wine of current SN_x packet; If still there is Max (T in the client in should newly gathering
ENB (j)) (the maximum feedback value in the new set)＞T
ENB (j)+ C
Buffer, j, then repeat said method, be timing relationship up to the transmitting time of eating dishes without rice or wine that redefines SN_0 or current SN_x packet for all clients.
Need to prove that if some set is too little, promptly number clients is less than default client system threshold in the set, the server end not client in this set sends the follow-up data bag, or indicates stop the to eat dishes without rice or wine transmission of packet of the interior client of this set.
Step 202: each client sends the follow-up data bag according to new timing relationship.
Also further comprise before the inventive method: server end issues MBMS service marker and MBMS service rate R to each client.If server end is supported the processing of absolute time, for example server end is supported the GPS function, and server end can also be further be handed down to client with the transmitting time of eating dishes without rice or wine of the SN_0 packet that sets in advance.At this moment, promptly in the initial moment of business, client is not set up the timing relationship with the transmitting time of eating dishes without rice or wine as yet SN number, and client is eated dishes without rice or wine transmitting time as the timing relationship adjustment amount with the SN_0 packet, sends the timing relationship adjustment amount that self needs to server end respectively; Server end is determined the new timing relationship in the MBMS content synchronization district and returns each client that each client sends the follow-up data bag according to new timing relationship.
From the inventive method as seen, detect content when asynchronous as client, each client in the carrying sub-district feeds back to server end with new timing relationship adjustment amount respectively, server end redefines the new timing relationship in the MBMS content synchronization district and returns to each client according to the timing relationship adjustment amount of each client feedback; And each client sends the follow-up data bag according to new timing relationship.The present invention has guaranteed when the network transfer delay fluctuation is big the content synchronization of follow-up data bag by to the SN number timely adjustment with the timing relationship of the transmitting time T that eats dishes without rice or wine.
The present invention will be described in detail below by several specific embodiments.
Fig. 3 is the flow chart that the present invention realizes the embodiment one of content synchronization, and as shown in Figure 3, embodiment one may further comprise the steps:
Step 301: server end sends the SN_0 packet to client, and shown in Fig. 4 a, Fig. 4 a is among the embodiment one, and initial content synch command or SN_0 packet arrive the schematic diagram of eNB.
Before this step, if server end is not by other existing approach such as MBMS RB, RAB configuration/negotiation, MBMS service marker and MBMS service rate R are handed down to client, so, also comprise step 300: server end sends initial content (SYNC_initialization) order synchronously to client, wherein carries MBMS service marker and MBMS service rate R, shown in Fig. 4 a, the signaling format of initial content synch command is as shown in table 1:
| The MBMS service marker | MBMS service rate R |
Table 1
If server end is supported GPS, also can further carry the transmitting time of eating dishes without rice or wine of the SN_0 packet that server end sets in advance in the initial content synch command, signaling format is as shown in table 2:
Table 2
Step 302: have client to detect that packet lag behind to arrive or the buffer memory ability is overflowed, promptly detect to exist content asynchronous.
Step 303: each user end to server end sends content synchronization request (SYNC_request), and the transmitting time of eating dishes without rice or wine that wherein carries the new SN_0 packet that needs separately is the timing relationship adjustment amount.
The signaling format of content synchronization request is as shown in table 3:
| The MBMS service marker | The pre-transmitting time (absolute value) that client is determined separately |
Table 3
Further, can also carry the buffer memory ability information of client in the content synchronization request, signaling format is as shown in table 4:
| The MBMS service marker | The pre-transmitting time that SYNC Client determines separately | Buffer buffer memory ability |
Table 4
Further, on the basis of table 3 or table 4, can also carry in the content synchronization request SN number.
Step 304: server end redefines the transmitting time of eating dishes without rice or wine of SN_0 or SN_x packet.
Shown in Fig. 4 b, Fig. 4 b is among the embodiment one, and the initial content synch command of different e NB feedback arrives the schematic diagram of the transmitting time of eating dishes without rice or wine of eNB or SN_0 packet in the carrying sub-district.If client is only fed back T
ENB (i), as the T among Fig. 4 b
ENB (1), T
ENB (2)And T
ENB (K), and T
ENB (1)＜T
ENB (2)＜T
ENB (K), then server end is from each T
ENB (i)In to choose a maximum value be T
ENB (K)The transmitting time of eating dishes without rice or wine as the SN_0 packet in the sub-district that redefines; Further, if Max is (T
ENB (i))-mean (T
ENB (i))＞preset data bag sending threshold value is then deleted Max (T
ENB (i)), server end does not send the follow-up data bag to deleted eNB (j), or indicates it to stop the transmission of packet of eating dishes without rice or wine, and continues to choose maximum in the residue set, up to Max (T
ENB (i))-mean (T
ENB (i))＜=preset data bag sending threshold value.Deleted Max (T
ENB (i)) corresponding eNB (j) keeps mourning in silence eating dishes without rice or wine, and do not send the data of this MBMS business.
Shown in Fig. 4 c, Fig. 4 c is among the embodiment one, generates the schematic diagram of a plurality of feedback time set.If client is fed back T simultaneously
ENB (i)With buffer memory ability C
Buffer, iThe time, suppose to exist T
ENB (1), T
ENB (2)And T
ENB (K), and T
ENB (1)＜T
ENB (2)＜T
ENB (K)Be Max (T
ENB (i)) be T
ENB (K), and Max (T
ENB (i))＞T
ENB (1)+ C
Buffer, 1, Max (T
ENB (i))＜T
ENB (2)+ C
Buffer, 2, Max (T
ENB (i))＜T
ENB (K)+ C
Buffer, K, then server end is for client 2 and client K, with Max (T
ENB (i)) be T
ENB (K)The transmitting time of eating dishes without rice or wine as the SN_0 packet of client in the sub-district that redefines 2 and client K; Remaining client 1 is as a new set, the Max (T of this moment
ENB (j)) be T
ENB (1), and Max (T
ENB (j))＜T
ENB (1)+ C
Buffer, 1, then server end is with Max (T
ENB (j)) be T
ENB (1)The transmitting time of eating dishes without rice or wine as the SN_0 packet of the client in the sub-district that redefines 1.
Step 305: server end is to each client returned content sync response (SYNC_response), wherein carries the transmitting time of eating dishes without rice or wine of the SN_0 packet of each client that server end redefines.
In this step, the transmitting time of eating dishes without rice or wine of the SN_0 packet that redefines can be absolute time such as gps time etc., also can be that relative time is the difference (or being called the transmitting time adjustment amount) of the transmitting time of transmitting time after the server end judgement and client feedback.
The signaling format of content synchronization response is shown in table 5 or table 6:
| The MBMS service marker | The transmitting time adjustment amount (relative value) that server end is determined |
Table 5
| The MBMS service marker | The transmitting time (absolute value) that server end is determined |
Table 6
Further, on the basis of table 5 or table 6, can also carry SN number in the content synchronization response.
Step 306: the transmitting time of eating dishes without rice or wine of the SN_0 packet of each client adjustment self, the basis that the transmitting time of eating dishes without rice or wine of the SN_0 packet that server end is returned sends as self follow-up data bag, by the processing of the process of SN_0 calculated for subsequent packet SN_x, no longer describe in detail here with reference to existing SN timing relationship.
Step 307-step 308: server end issues follow-up SN_x packet to client, and each client sends follow-up SN_x packet according to the transmitting time of eating dishes without rice or wine of adjusted SN_0 packet.
In this step, each client sends follow-up SN_x packet according to eat dishes without rice or wine transmitting time and the default timing relationship of new SN_0 packet.
Fig. 5 is the flow chart that the present invention realizes the embodiment two of content synchronization, and as shown in Figure 5, embodiment two may further comprise the steps:
The specific implementation of step 500-step 504 and step 300-step 304 in full accord repeats no more here.
Step 505: server end issues follow-up SN_x packet to each client, wherein is provided with newly-increased timestamp field, and this timestamp field is used to carry the transmitting time of eating dishes without rice or wine of the SN_0 packet of each client that server end redefines.
In this step, need in packet, increase the feedback that the timestamp field is supported the transmitting time of eating dishes without rice or wine of SN_0 packet.The mode of this interpolation timestamp is equivalent to define a kind of new protocol layer on transport layer, its header structure is as shown in table 7.
Table 7
The specific implementation of step 506-step 508 and step 306-step 308 in full accord repeats no more here.
Find out that easily embodiment two is with the difference of embodiment one: server end does not need to adopt the content synchronization response signaling, the transmitting time of eating dishes without rice or wine of adjusted SN_0 packet feeds back to each client by timestamp newly-increased in the follow-up data bag.
Have when Fig. 3 and business shown in Figure 5 are initiated client detect packet lag behind arrive or flow process that the buffer memory ability is overflowed, also exist in the professional transmission course, because the processing that the transmitting time that the network transfer delay shake causes is reset is described in detail as follows below in conjunction with embodiment three and embodiment four:
Fig. 6 is the flow chart that the present invention realizes the embodiment three of content synchronization, and as shown in Figure 6, embodiment three comprises following steps:
Step 600: server end sends the SN_x packet to client.
Step 601: have client to detect that packet lag behind to arrive or the buffer memory ability is overflowed.
Step 602: each user end to server end sends content synchronization request, and the SN_x or the predefine of the SN_0 packet transmitting time of eating dishes without rice or wine that wherein carry separately are the timing relationship adjustment amount.
Detect as client that packet lag behind to arrive or the buffer memory ability is overflowed, server end can send the timing relationship adjustment amount that self needs by other client in the initial content synch command notifying MBMS content synchronization district.
The transmission of the client cancellation SN_x packet of content step-out takes place simultaneously.
Step 603: server end redefines the transmitting time of eating dishes without rice or wine of SN_x packet.The method of determining has been done detailed description in abovementioned steps 304, repeat no more here.
Step 604: server end is to each client returned content sync response, wherein carries the SN_x of each client that server end redefines or the transmitting time of newly eating dishes without rice or wine of SN_0 packet.
Step 605: the transmitting time of eating dishes without rice or wine of the SN_x packet of each client adjustment self, the basis that the transmitting time of newly eating dishes without rice or wine of SN_0 that server end is returned or SN_x packet sends as self follow-up data bag.
Step 606-step 607: server end issues follow-up SN_y packet to client, each client sends follow-up SN_y packet according to the transmitting time of eating dishes without rice or wine of adjusted SN_0 or SN_x packet, and promptly eat dishes without rice or wine transmitting time and the default timing relationship according to new SN_0 or SN_x packet sends follow-up SN_y packet.
Wherein, the MBMS packet of between step 602-step 605, receiving, each client that the content step-out does not take place still sends according to old timing relationship; If the SN_x packet is still effective to adjusting the back timing relationship in the buffer memory, then the SN_x packet need not abandon, so the packet in all buffer memorys after the step 606 all sends according to new timing relationship.
Fig. 7 is the flow chart that the present invention realizes the embodiment four of content synchronization, as shown in Figure 7, embodiment four only is that with the difference of embodiment three step 604 is inequality with the implementation method of step 704, in step 704, server end issues follow-up SN_y packet to each client, wherein be provided with newly-increased timestamp field, this timestamp field is used to carry the transmitting time of eating dishes without rice or wine of the SN_x packet of each client that server end redefines, be embodied in and done detailed description in the above-mentioned steps 505, repeat no more here.
Description from the step 201 of the foregoing description as seen, server end comes the transmitting time of eating dishes without rice or wine of specified data bag according to maximum transmitted time delay estimation approach.The sub-district that overtime (lag behind and arrive)/buffer memory when taking place overflows (arriving in advance) more for a long time; synchronous reception for MBMS business in guaranteeing on a large scale; the business that guarantees the community user that overtime/buffer memory overflows simultaneously is uninterrupted; the present invention adopts the sub-district dividing mode shown in Fig. 8 a; Fig. 8 a is that schematic diagram is divided in the sub-district of the present invention embodiment five of realizing content synchronization; shown in Fig. 8 a; the upper left cell area of thick dashed line is that the sub-district that hysteresis arrival/buffering area overflows promptly takes place main retaining zone; the bottom-right cell area of heavy line is for shifting to an earlier date/the hysteresis sending zone, and the cell area between thick dashed line and the heavy line is a boundary belt.
Wherein, boundary belt is the existing notion among the LTE MBMS. be positioned at the border with frequency net (SFN), for avoiding adjacent two interference that SFN is interregional, the sub-district in the boundary belt keeps mourning in silence.If exist the feedback of client to satisfy Max (T
ENB (i))＞T
ENB (i)+ C
Buffer, i, what server end was formed with neighbor cell bunch is that step 201 carry out in unit, the operation of 304 grades.At first, the maximum T during server end is determined every bunch
ENB (i): Max_cluster (T
ENB (i)), then with Max_cluster (T
ENB (i)) alternative T
ENB (i)Carry out step 201, the operation of 304 grades.Promptly bunch being that unit determines new timing relationship.What have identical timing relationship bunch is defined as a SFN, and according to the definition of SFN boundary belt is set.
From Fig. 8 a as seen, the MBMS lead-lag sending zone of composition and boundary belt is set separately, sub-district that arrivals/buffering area overflows that take place to lag behind.Server end is the transmitting time of eating dishes without rice or wine that two zones are provided with different SN_0 packets respectively, is T as main retaining zone
0, in advance/the hysteresis sending zone is T
1The sub-district of main retaining zone is at T
0+ (X/R) send the SN_x packet, in advance/hysteresis region is at T
1+ (X/R) send the SN_x packet.Fig. 8 b is the schematic flow sheet that the present invention realizes the embodiment five of content synchronization, shown in Fig. 8 b, supposes that supporting region is divided into regional A and area B, has client and detect that packet lag behind to arrive or the buffer memory ability is overflowed when business is initiated, and comprising:
Server end is respectively to regional A and area B returned content sync response, wherein in the response of content synchronization that regional A returns, carry the transmitting time of eating dishes without rice or wine of SN_0 packet of each client of the regional A that server end redefines, in the content synchronization response that area B is returned, carry the transmitting time of eating dishes without rice or wine of SN_0 packet of each client of the area B that server end redefines;
The transmitting time of eating dishes without rice or wine of the SN_0 packet of each client adjustment self in zone A and the area B, the transmitting time of eating dishes without rice or wine of the SN_0 packet of each client of the eat dishes without rice or wine transmitting time and the area B of the SN_0 packet of the regional A that server end is returned sends follow-up SN_x packet as the basis that self follow-up data bag sends respectively.
The method that provides according to the invention described above, the present invention also provides a kind of system that realizes content synchronization, Fig. 9 realizes the structural representation of the system of content synchronization for the present invention, as shown in Figure 9, this system comprises the client and server end, described client is one or more, is in the same MBMS content synchronization district; Detect content when asynchronous or receiving the server end requirement when sending the timing relationship adjustment amount as client, described user end to server end sends the timing relationship adjustment amount that self needs; Described server end is after receiving the timing relationship adjustment amount that detects the nonsynchronous client transmission of content, notify the timing relationship adjustment amount that other client sends self to be needed, and determine new timing relationship according to the timing relationship adjustment amount that each client that receives sends, determined new timing relationship is returned described each client.
Described client also is used for the buffer memory ability to server end transmission self.
Described server end also is used for sending the SN_0 packet to each client; Described each client is eated dishes without rice or wine transmitting time as the timing relationship adjustment amount with the SN_0 packet, sends the timing relationship adjustment amount that self needs to server end respectively; Server end is determined the new timing relationship in the MBMS content synchronization district and returns each client that each client sends the follow-up data bag according to new timing relationship.
Described server end also is used for issuing MBMS service marker and MBMS service rate to each client.
Described server end also is used for the sub-district that MBMS content synchronization zoning is divided into main synchronization zone and the arrivals/buffering area that take place to lag behind overflows, and in main synchronization zone with take place between the sub-district that hysteresis arrival/buffering area overflows boundary belt to be set; Described server end respectively at different zones determine separately new timing relationship and the client in each zone.
Described client is any node in user equipment (UE) or the Access Network; Node in the described Access Network is evolution base station or base station; Described server end is MBMS controller or the interior arbitrary network node of core net in content server end, the Access Network.
The SN packet that is not limited only to SN_0 fiducial time regularly among the present invention all can be used as the fiducial time of SN timing other any SN number.Synchronization mechanism among the present invention can expand to the content synchronization of non-MBMS business such as distributed program or process synchronously, distributed or that multi-user group/group is played is synchronous etc.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a method that realizes content synchronization is characterized in that, this method comprises:
Client detects content when asynchronous, sends the timing relationship adjustment amount that self needs to server end;
Server end notifies other client in the content synchronization district at this client place to send the timing relationship adjustment amount that self needs after receiving described timing relationship adjustment amount;
Server end is determined new timing relationship according to the timing relationship adjustment amount that each client that receives sends, and determined new timing relationship is returned described each client.
2. method according to claim 1 is characterized in that, described definite new timing relationship is: choose maximum from each timing relationship adjustment amount, as timing relationship.
3. method according to claim 1 is characterized in that, when client detects content when asynchronous, further comprise: described user end to server end sends the buffer memory ability of self.
4. method according to claim 3 is characterized in that, described definite new timing relationship is: choose maximum value as maximum timing relationship adjustment amount from each timing relationship adjustment amount;
For each client, at maximum timing relationship adjustment amount during less than its timing relationship adjustment amount and buffer memory ability sum, with described maximum timing relationship adjustment amount as timing relationship;
In described client, when having maximum timing relationship adjustment amount greater than separately timing relationship adjustment amount and buffer memory ability sum, with described maximum timing relationship adjustment amount as satisfying the timing relationship of maximum timing relationship adjustment amount less than the client of timing relationship adjustment amount and buffer memory ability sum; Remaining client is formed new set and is redefined maximum timing relationship adjustment amount, redefines timing relationship until all clients.
5. according to claim 2 or 4 described methods, it is characterized in that this method also comprises: set in advance the packet sending threshold value;
Describedly from each timing relationship adjustment amount, choose after the maximum, further comprise:
In the difference of the mean value of described maximum and described each timing relationship adjustment amount during greater than the packet sending threshold value, perhaps, in the difference of described maximum and the mean value of residue timing relationship adjustment amount except that the timing relationship adjustment amount of described maximum clients corresponding during greater than the packet sending threshold value, described server end stops to send the follow-up data bag to the timing relationship adjustment amount clients corresponding of this maximum of selecting, or indicates stop the to eat dishes without rice or wine transmission of packet of this client;
Remaining client is formed new set and is redefined maximum timing relationship adjustment amount, and continue in the residue set, to choose maximum, difference up to the mean value of described maximum and described each timing relationship adjustment amount is less than or equal to preset data bag sending threshold value, and perhaps described maximum is less than or equal to the packet sending threshold value with the difference of the mean value of residue timing relationship adjustment amount except that the timing relationship adjustment amount of described maximum clients corresponding.
6. method according to claim 4 is characterized in that, sets in advance client system threshold;
Number clients in described new set is during less than client system threshold, and the client that described server end stops in this set sends the follow-up data bag, or indicates stop the to eat dishes without rice or wine transmission of packet of the interior client of this set.
7. according to claim 1,2 or 4 described methods, it is characterized in that described timing relationship adjustment amount is absolute time or relative time.
8. method according to claim 7, it is characterized in that, when described timing relationship adjustment amount is absolute time, described absolute time is that frame number is the new transmitting time of eating dishes without rice or wine of 0 packet SN_0, perhaps, the binary crelation group of the transmitting time composition of newly eating dishes without rice or wine of the frame number x of the packet of arrival and SN_x packet.
9. method according to claim 7, it is characterized in that, when described timing relationship adjustment amount is relative time, described relative time be the SN_0 packet newly eat dishes without rice or wine transmitting time with as last time the content synchronization value of feedback the SN_0 packet the old transmitting time of eating dishes without rice or wine difference or, newly the eat dishes without rice or wine transmitting time and the binary crelation group formed of the difference of the old transmitting time of eating dishes without rice or wine of SN_x packet of the frame number x of the packet that arrives and SN_x packet as content synchronization value of feedback last time.
10. method according to claim 7 is characterized in that, described content synchronization district is MBMS content synchronization district; Described client detect content asynchronous before, further comprise: the surplus relevant with the transmission delay of eating dishes without rice or wine is set;
The new SN_0 packet transmitting time of eating dishes without rice or wine is: the time of reception of the current packet that receives of described client, with SN number of the current packet that receives difference with the merchant of MBMS service rate R; Perhaps, the time of reception of the current packet that receives of described client and surplus sum are with SN number of the current packet that the receives difference with the merchant of service rate R;
The new SN_x packet transmitting time of eating dishes without rice or wine is: the time of reception of the current packet SN_x that receives of described client; Perhaps, time of reception and the surplus sum of the current packet SN_x that receives of described client.
11. method according to claim 1 is characterized in that, described client detect content asynchronous before, further comprise: it is 0 SN_0 packet that described server end sends sequence number to each client;
Described each client with SN_0 packet time of advent as the timing relationship adjustment amount, send the timing relationship adjustment amount that self needs to server end respectively; Server end is determined the new timing relationship in the content synchronization district and is returned to each client.
12. method according to claim 1, it is characterized in that, the described new timing relationship that will determine returns to each client and is: server end returns the signaling of the content synchronization response that carries described new timing relationship to each client, or described server end is carried on described new timing relationship in the follow-up data bag, issues to each client.
13. method according to claim 1 is characterized in that, described content synchronization district is MBMS content synchronization district; Before described server end was determined new timing relationship, this method also comprised:
Described server end is the sub-district that described MBMS content synchronization zoning is divided into main synchronization zone and the arrivals/buffering area that take place to lag behind overflows, and in main synchronization zone with take place between the sub-district that hysteresis arrival/buffering area overflows boundary belt to be set;
Described server end is determined new timing relationship separately at different zones respectively and is sent to client in the corresponding zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101059229A CN101316162B (en) | 2007-06-01 | 2007-06-01 | Method for implementing contents synchronization, client terminal equipment and server terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101059229A CN101316162B (en) | 2007-06-01 | 2007-06-01 | Method for implementing contents synchronization, client terminal equipment and server terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101316162A CN101316162A (en) | 2008-12-03 |
| CN101316162B true CN101316162B (en) | 2011-08-31 |
Family
ID=40107021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101059229A Expired - Fee Related CN101316162B (en) | 2007-06-01 | 2007-06-01 | Method for implementing contents synchronization, client terminal equipment and server terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101316162B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170584B (en) * | 2011-03-14 | 2015-06-03 | 华为技术有限公司 | Method, device and system for playing media between synchronic HS (HTTP (HyperText Transfer Protocol) Streaming) terminal equipment |
| CN114124334B (en) * | 2021-11-16 | 2024-04-23 | 紫光展锐(重庆)科技有限公司 | Processing method, client, equipment and medium of air interface data packet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6778493B1 (en) * | 2000-02-07 | 2004-08-17 | Sharp Laboratories Of America, Inc. | Real-time media content synchronization and transmission in packet network apparatus and method |
| CN1536849A (en) * | 2003-04-03 | 2004-10-13 | 华为技术有限公司 | Method for synchronously implementing web tube total web clock |
| US7185090B2 (en) * | 2000-03-16 | 2007-02-27 | Sharp Laboratories Of America, Inc. | Multimedia wired/wireless content synchronization method |
-
2007
- 2007-06-01 CN CN2007101059229A patent/CN101316162B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6778493B1 (en) * | 2000-02-07 | 2004-08-17 | Sharp Laboratories Of America, Inc. | Real-time media content synchronization and transmission in packet network apparatus and method |
| US7185090B2 (en) * | 2000-03-16 | 2007-02-27 | Sharp Laboratories Of America, Inc. | Multimedia wired/wireless content synchronization method |
| CN1536849A (en) * | 2003-04-03 | 2004-10-13 | 华为技术有限公司 | Method for synchronously implementing web tube total web clock |
Non-Patent Citations (3)
| Title |
|---|
| Alcatel.Details of SYNC Protocols for eMBMS Content Synchronisa-tion.《3GPP TSG-RAN WG 3 Meeting #54，R3-061801》.2006, * |
| Alcatel-Lucent.Details of eMBMS Content Synchronization.《3GPP TSG-RAN WG3 #55,R3-070220》.2007, * |
| Nokia.L2 content synchronization options.《3GPP TSG-RAN WG3#54，R3-061755》.2006,全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101316162A (en) | 2008-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101395824B (en) | Method, root node and base station for quasi synchronous transmission in cellular networks | |
| US6556576B1 (en) | Local area network with a bridge terminal for transmitting data between a plurality of sub-networks | |
| CN101741701B (en) | Synchronous dispatching method and synchronous dispatching device | |
| CN101981874B (en) | Synchronous method and corresponding base station is carried out between gateway and base station | |
| CN101282230B (en) | Method for implementing broadcast data whole-network synchronization | |
| CN101741538B (en) | Synchronous dispatching method | |
| CN101043265B (en) | Method for realizing multimedia broadcasting and multicasting service data synchronized transmission | |
| CN101039175B (en) | Method and system for synchronizing RLC in wireless network controllers | |
| CN1277502A (en) | Radio communication using circuit-oriented and group-oriented frame s election/distribution function | |
| WO2008009228A1 (en) | A relay transmitting method, apparatus and system for connection of wide-band wireless signal | |
| CN101394293A (en) | System for implementing broadcast data full network synchronization | |
| CN101400018B (en) | Broadcast data synchronization layer implementing method | |
| JP3621428B2 (en) | Packet transmission method, packet transmission device, radio frame transmission method, mobile communication method, mobile communication system, and switching center | |
| CN101350663A (en) | Method and system for data synchronization of multimedia multicast and broadcast service | |
| CN101969689A (en) | Method for realizing time synchronization and method for obtaining dispatching information | |
| CN101686431A (en) | Synchronous processing method and device | |
| CN101043653B (en) | Method for realizing transparent mode based inter-wireless network controller MBMS service synchronization | |
| CN101316162B (en) | Method for implementing contents synchronization, client terminal equipment and server terminal equipment | |
| CN101316133B (en) | Multimedia broadcast multicast service transmission method and device | |
| CN101047437B (en) | Method for controlling serial number synchronization for radio link and radio network controller | |
| CN101425914A (en) | Multimedia multicast service synchronization regulation method and reinforced base station | |
| CN101350664A (en) | Method for synchronization of multimedia broadcast and multicast | |
| CN103179656A (en) | Method and system for transmitting business flow synchronously in heterogeneous network | |
| CN101364884A (en) | Method and apparatus transmitting multimedia broadcast and multicast service data packet | |
| CN101051864B (en) | Synchronizing method for realizing RLC sequence number between RNC for MBMS service |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 |