CN101499870B - Method and apparatus for multimedia broadcast multicast service data synchronization between RNCs - Google Patents
Method and apparatus for multimedia broadcast multicast service data synchronization between RNCs Download PDFInfo
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- CN101499870B CN101499870B CN 200810006133 CN200810006133A CN101499870B CN 101499870 B CN101499870 B CN 101499870B CN 200810006133 CN200810006133 CN 200810006133 CN 200810006133 A CN200810006133 A CN 200810006133A CN 101499870 B CN101499870 B CN 101499870B
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Abstract
The invention discloses a synchronizing method of multimedia broadcast and multicast service data between radio network controllers, which is used for realizing the synchronization of multimedia broadcast and multicast service data between a master radio network controller and at least one slave radio network controller and comprises the following steps: the master radio network controller configures a transmission delay of multimedia broadcast and multicast service data packages from the master radio network controller to the slave radio network controller; the master radio network controller determines a timestamp for the multimedia broadcast and multicast service data packages according to the configured transmission delay and a present time at which the master radio network controller begins to process the multimedia broadcast and multicast service data packages, and leads the multimedia broadcast and multicast service data packages to carry the timestamp; and the master radio network controller sends the multimedia broadcast and multicast service data packages that carry the timestamp to the slave radio network controller. The invention further discloses a synchronizing device of multimedia broadcast and multicast service data between radio network controllers.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of radio network controller (Radio Network Controller, method for synchronous and the device of multimedia broadcast-multicast service abbreviation RNC) (Multimedia Broadcast/Multicast Service is called for short MBMS) data.
Background technology
Along with the fast development of Internet network, people no longer content just to phone and messaging service to the demand of mobile communication, at present, a large amount of multimedia services occurred.For some applied business wherein, a plurality of users can receive identical data simultaneously, such as video request program, television broadcasting, video conference, online education, interactive game etc.
In order to realize utilizing most effectively mobile network resource, the MBMS technology has appearred.MBMS refers to that a data source sends the point-to-multipoint service of data to a plurality of users, and it has realized that Internet resources share, and comprises especially sharing of interface-free resources of mobile core network and access network resource.
3GPP (3rd Generation Partnership Project, third generation partner program) MBMS of definition can not only realize classes of messages multicast and the broadcasting of plain text low rate, and can also realize multimedia service multicast and the broadcasting of two-forty, this has complied with the trend of following Mobile data development undoubtedly.
As the technology that improves the professional availability of frequency spectrum of MBMS, SFN (SingleFrequency Network, single frequency network) or Chip merge (chip-level merging) wireless signal that all adjacent base station synchronized transmissions of specification requirement are identical.
Under the SFN pattern, UE (User Equipment, subscriber equipment) signal from different base station can be considered as multipath signal, so that transmitting broadcasting service, public physic channel obtains larger signal gain, thereby improved QoS (Quality ofService, the service quality) performance of MBMS business.But the introducing of this technology has also brought new problem, that is, if be considered as multipath from the signal of different base station by UE, then require each footpath data must keep synchronized transmission.Under the Chip merging patterns, UE receives the service signal that different base station sends simultaneously, and realizes merging at chip-level by the multi-cell joint detection technology.The MBMS service signal that this different districts that all requires UE to receive sends all is being the same with being for the moment.
Variation has occured in the protocol stack of user's face behind the 3GPP introducing MBMS, RNC can be according to core net coverage (Service Area when the MBMS service carrier is set up, referred to as SA) tabulation, be made into the cell set mode with affiliated cell set and set up shared PDCP (the Packet Data Convergence Protocol in a plurality of residential quarters, PDCP) and RLC (Radio Link Control, Radio Link control) entity, MAC-m (Medium Access Control for MBMS is separately used in each residential quarter, the media access control of MBMS) and FP separately (Frame Protocol, Frame Protocol).
The MBMS business is the service towards the whole network, and same MBMS business may be based upon on the different RNCs.Like this, residential quarter between different RNCs is in order to utilize SFN or Chip folding to improve the UE receiving gain, need and the identical MBMS business of cell synchronous transmission of the adjacent R NC signal of eating dishes without rice or wine, otherwise, belong to that signal can cause co-channel interference between the neighbor cell of different RNCs, perhaps UE can not get receiving gain.
Because the mode of different RNCs processing service data and parameter is different, and consider that network congestion causes the delay of the business datum that RNC receives even the possibility of losing, the minizone that therefore will guarantee to belong to different RNCs can the identical signal of eating dishes without rice or wine of synchronized transmission, needs harmonious assurance the between RNC.
As shown in Figure 1, a kind of by the Iur Interface realization RNC between RNC between in the method for MBMS service synchronization, the RNC that needs synchronized transmission MBMS business is divided into main RNC and from RNC from function, wherein, main RNC processes the MBMS business datum, and is distributed to each from RNC by Iur Interface realization data.In packet, carry the delivery time that timestamp is specified each packet in the method.
But, in correlation technique, not yet propose to determine the scheme of the timestamp value in each packet.
Summary of the invention
Consider the problems referred to above and make the present invention, for this reason, main purpose of the present invention is to provide method for synchronous and the device of multimedia broadcast and multicast service data between a kind of radio network controller, so that need the synchronous identical MBMS packet of RNC synchronized transmission.
The invention provides the method for synchronous of multimedia broadcast and multicast service data between a kind of radio network controller, be used for to realize primary wireless network controller and at least one synchronous from the multimedia broadcast multicast data between radio network controller.
The method comprises: primary wireless network controller configuration multimedia broadcast and multicast service data bag is from the primary wireless network controller to the transmission delay from the Wi-Fi controller; The primary wireless network controller is determined the timestamp of multimedia broadcast and multicast service data bag according to the current time that transmission delay and the primary wireless network controller of configuration begins to process the multimedia broadcast and multicast service data bag, and carries timestamp in the multimedia broadcast and multicast service data bag; The multimedia broadcast and multicast service data bag that the primary wireless network controller will carry timestamp is sent to from radio network controller.
Wherein, the configuration transmission delay processing specifically comprise: for all from the Wi-Fi controller each from the Wi-Fi controller, the primary wireless network controller disposes respectively the transmission delay of the packet of multimedia broadcast-multicast service, and determines timestamp according to all maximum transmitting time delay from the transmission delay of Wi-Fi controller.
Wherein, the processing of determining timestamp specifically comprises: will the current time be defined as Connection Frame Number, and determine timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is timestamp, and represents with Connection Frame Number, Tc is the current time, mod represents that delivery calculates, and T is transmission delay, and Tp is the maximum occurrences+1 of Connection Frame Number.
Wherein, the processing of determining timestamp specifically comprises: will the current time be defined as System Frame Number, and determine timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is timestamp, and represents with System Frame Number, Tc is the current time, mod represents that delivery calculates, and T is transmission delay, and Tp is the maximum occurrences+1 of System Frame Number.
Wherein, the maximum of Connection Frame Number is 255, and the maximum length value of System Frame Number is 4095.
Wherein, current time and transmission delay meet the following conditions: t mod N=0, and wherein, mod represents that delivery calculates; N is the Transmission Time Interval of the transmission channel of multimedia broadcast multicast data bag mapping, take the 10ms frame as unit; T is current time or transmission delay, take the 10ms frame as unit.
The present invention also provides the synchronizer of multimedia broadcast and multicast service data between a kind of radio network controller, be used for to realize primary wireless network controller and at least one synchronous from the multimedia broadcast multicast data between radio network controller.
This device comprises: the transmission delay configuration module is used for configuration multimedia broadcast and multicast service data bag and is transferred to from the transmission delay of Wi-Fi controller from the primary wireless network controller; The timestamp determination module, the primary wireless network controller is determined the timestamp of multimedia broadcast and multicast service data bag according to the current time that transmission delay and the primary wireless network controller of configuration begins to process the multimedia broadcast and multicast service data bag, and carries timestamp in the multimedia broadcast and multicast service data bag; Sending module is sent to from radio network controller for the multimedia broadcast and multicast service data bag that will carry timestamp.
Wherein, transmission delay configuration module configuration for all from the Wi-Fi controller each from the Wi-Fi controller, dispose respectively the transmission delay of the packet of multimedia broadcast-multicast service, and determine timestamp according to all maximum transmitting time delay from the transmission delay of Wi-Fi controller.
Wherein, the timestamp determination module is when determining timestamp, carry out following the processing: will the current time be defined as Connection Frame Number, and determine timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is timestamp, Tc is the current time, mod represents that delivery calculates, and T is transmission delay, and Tp is the maximum occurrences+1 of Connection Frame Number; Perhaps will the current time be defined as System Frame Number, and determine timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is timestamp, and Tc is the current time, and mod represents that delivery calculates, T is transmission delay, and Tp is the maximum occurrences+1 of System Frame Number.
Current time and transmission delay meet the following conditions: t mod N=0, and wherein, mod represents that delivery calculates; N is the Transmission Time Interval of the transmission channel of multimedia broadcast multicast data bag mapping, take the 10ms frame as unit; T is current time or transmission delay, take the 10ms frame as unit.
By technique scheme of the present invention, timestamp that can the specified data bag, in the situation that does not change hardware, simply and effectively realize multimedia broadcast and multicast service data synchronously.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the networking schematic diagram that the Iur interface realizes that between RNC the MBMS service synchronization sends that passes through according to correlation technique;
Fig. 2 is the flow chart according to the method for synchronous of multimedia broadcast and multicast service data between the radio network controller of the inventive method embodiment; And
Fig. 3 is the block diagram according to the synchronizer of multimedia broadcast and multicast service data between the radio network controller of apparatus of the present invention embodiment.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
Embodiment of the method
In the present embodiment, provide the method for synchronous of multimedia broadcast and multicast service data between a kind of radio network controller, be used for to have realized primary wireless network controller and at least one synchronous from the multimedia broadcast multicast data between radio network controller.
As shown in Figure 2, method for synchronous according to multimedia broadcast and multicast service data between the radio network controller of present embodiment comprises: step S202, and primary wireless network controller configuration multimedia broadcast and multicast service data bag is from the primary wireless network controller to the transmission delay from the Wi-Fi controller; Step S204, the primary wireless network controller is determined the timestamp of multimedia broadcast and multicast service data bag according to the current time that transmission delay and the primary wireless network controller of configuration begins to process the multimedia broadcast and multicast service data bag, and carries timestamp in the multimedia broadcast and multicast service data bag; The multimedia broadcast and multicast service data bag that step S206, primary wireless network controller will carry timestamp is sent to from radio network controller.
Wherein, the configuration transmission delay processing specifically comprise: for all from the Wi-Fi controller each from the Wi-Fi controller, the primary wireless network controller disposes respectively the transmission delay of the packet of multimedia broadcast-multicast service, and determines timestamp according to all maximum transmitting time delay from the transmission delay of Wi-Fi controller.
Wherein, for example, in the TD-SCDMA system, determine that the processing of timestamp specifically comprises: will the current time be defined as Connection Frame Number, and determine timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is timestamp, and represents with Connection Frame Number, Tc is the current time, mod represents that delivery calculates, and T is transmission delay, and Tp is the maximum occurrences+1 of Connection Frame Number.
In addition, for example, in the TD-SCDMA system, determine that the processing of timestamp specifically comprises: will the current time be defined as System Frame Number, and determine timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is timestamp, and represents with System Frame Number, Tc is the current time, mod represents that delivery calculates, and T is transmission delay, and Tp is the maximum occurrences+1 of System Frame Number.
Wherein, current time and transmission delay meet the following conditions: t mod N=0, and wherein, mod represents that delivery calculates; N is the Transmission Time Interval of the transmission channel of multimedia broadcast multicast data bag mapping, take the 10ms frame as unit (that is, when the Transmission Time Interval of transmission channel is 40ms, N=4); T is current time or transmission delay, take the 10ms frame as unit.
Wherein, the maximum of Connection Frame Number is 255, and the maximum length value of System Frame Number is 4095.
Below in conjunction with instantiation the present invention is described.
In the TD-SCDMA system, definition time-delay T is that main RNC needs the synchronous with it maximum from the RNC time-delay to all, take the 10ms frame as unit.Definition current time Tc is current wireless interface Connection Frame Number CFN.Defining main RNC sends to from the MBMS packet timestamp of RNC as sending the wave point CFN zero hour of this packet.
The Transmission Time Interval of the professional transmission channel that shines upon is 40ms, namely 4 10ms.
Main RNC sends the MBMS business data packet to each during from RNC by the Iur interface, according to the time stamp T s of following formula specified data bag:
Ts＝(Tc+T)mod?256；
Mod is that delivery calculates in the formula.256 is the value cycle (that is, the maximum of CFN+1, usually, the maximum of CFN is 255) of CFN.
Tc and T all satisfy following formula in the formula: t mod 4=0, t=Tc, T.
Main RNC carries this time stamp T s in the packet that will send.
By the Iur interface receive this packet from RNC, the time stamp T s of read data packet, and determine to send this packet to the time of its subordinate NodeB with this, to guarantee that NodeB when wave point CFN value is as this Ts value, begins to send described MBMS packet next time.
In this example, consistent because main RNC sends to all timestamps from RNC, and also in the TD-SCDMA system, the CFN value is that the whole network is synchronous, can guarantee that so identical packet is engraved in wave point and sends when identical CFN.
Processing mode and above-mentioned processing for SFN are similar, no longer repeat here.
Device embodiment
In the present embodiment, provide the synchronizer of multimedia broadcast and multicast service data between a kind of radio network controller, be used for to have realized primary wireless network controller and at least one synchronous from the multimedia broadcast multicast data between radio network controller.
As shown in Figure 3, synchronizer according to multimedia broadcast and multicast service data between the radio network controller of present embodiment comprises: transmission delay configuration module 302 is used for configuration multimedia broadcast and multicast service data bag and is transferred to from the transmission delay of Wi-Fi controller from the primary wireless network controller; Timestamp determination module 304, the primary wireless network controller is determined the timestamp of multimedia broadcast and multicast service data bag according to the current time that transmission delay and the primary wireless network controller of configuration begins to process the multimedia broadcast and multicast service data bag, and carries timestamp in the multimedia broadcast and multicast service data bag; Sending module 306 is sent to from radio network controller for the multimedia broadcast and multicast service data bag that will carry timestamp.
Wherein, transmission delay configuration module configuration for all from the Wi-Fi controller each from the Wi-Fi controller, dispose respectively the transmission delay of the packet of multimedia broadcast-multicast service, and determine timestamp according to all maximum transmitting time delay from the transmission delay of Wi-Fi controller.
Wherein, the timestamp determination module is when determining timestamp, carry out following the processing: will the current time be defined as Connection Frame Number, and determine timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is timestamp, and representing that with Connection Frame Number Tc is the current time, mod represents that delivery calculates, T is transmission delay, and Tp is the maximum occurrences+1 of Connection Frame Number; Perhaps will the current time be defined as System Frame Number, and determine timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is timestamp, and represents with System Frame Number, and Tc is the current time, mod represents that delivery calculates, and T is transmission delay, and Tp is the maximum occurrences+1 of System Frame Number.
Current time and transmission delay meet the following conditions: t mod N=0, and wherein, mod represents that delivery calculates; N is the Transmission Time Interval of the transmission channel of multimedia broadcast multicast data bag mapping, take the 10ms frame as unit; T is current time or transmission delay, take the 10ms frame as unit.
In sum, the present invention can consider main RNC to a plurality of transmission delays from RNC different and each determine timestamp from the factors such as transmission delay that send to its subordinate's NodeB after RNC receives packet.By means of technical scheme of the present invention, timestamp that can the specified data bag, in the situation that does not change hardware, simply and effectively realize multimedia broadcast and multicast service data synchronously.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the method for synchronous of multimedia broadcast and multicast service data between a radio network controller is used for realizing primary wireless network controller and at least one synchronous from the multimedia broadcast multicast data between radio network controller, it is characterized in that described method comprises:
Described primary wireless network controller configuration multimedia broadcast and multicast service data bag is from described primary wireless network controller to described transmission delay from radio network controller;
Described primary wireless network controller is determined the timestamp of described multimedia broadcast and multicast service data bag according to the current time that described transmission delay and the described primary wireless network controller of configuration begins to process described multimedia broadcast and multicast service data bag, and carries described timestamp in described multimedia broadcast and multicast service data bag;
The described multimedia broadcast and multicast service data bag that described primary wireless network controller will carry described timestamp is sent to described from radio network controller;
The processing of wherein, disposing described transmission delay specifically comprises:
For all from radio network controller each from radio network controller, described primary wireless network controller disposes respectively the transmission delay of the packet of multimedia broadcast-multicast service, and determines described timestamp according to described all maximum transmitting time delay from the transmission delay of radio network controller.
2. method according to claim 1 is characterized in that, determines that the processing of described timestamp specifically comprises:
The described current time is defined as Connection Frame Number, and determine described timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is described timestamp, Tc is the described current time, and represents with described Connection Frame Number, and mod represents that delivery calculates, T is described transmission delay, and Tp is the maximum occurrences+1 of described Connection Frame Number.
3. method according to claim 2 is characterized in that, described Connection Frame Number maximum is 255.
4. method according to claim 1 is characterized in that, determines that the processing of described timestamp specifically comprises:
The described current time is defined as System Frame Number, and determine described timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is described timestamp, Tc is the described current time, and represents with described System Frame Number, and mod represents that delivery calculates, T is described transmission delay, and Tp is the maximum occurrences+1 of described System Frame Number.
5. method according to claim 4 is characterized in that, the maximum of described System Frame Number is 4095.
6. method according to claim 1 is characterized in that, described current time and described transmission delay meet the following conditions:
T mod N=0, wherein, mod represents that delivery calculates; N is the Transmission Time Interval of the transmission channel of described multimedia broadcast multicast data bag mapping, take the 10ms frame as unit; T is described current time or described transmission delay, take the 10ms frame as unit.
7. the synchronizer of multimedia broadcast and multicast service data between a radio network controller is used for realizing primary wireless network controller and at least one synchronous from the multimedia broadcast multicast data between radio network controller, it is characterized in that described device comprises:
The transmission delay configuration module is used for configuration multimedia broadcast and multicast service data bag and is transferred to described transmission delay from radio network controller from described primary wireless network controller;
The timestamp determination module, the current time that is used for beginning to process according to the described transmission delay of configuration and described primary wireless network controller described multimedia broadcast and multicast service data bag is determined the timestamp of described multimedia broadcast and multicast service data bag, and carries described timestamp in described multimedia broadcast and multicast service data bag;
Sending module is sent to described from radio network controller for the described multimedia broadcast and multicast service data bag that will carry described timestamp;
Wherein, for all from radio network controller each from radio network controller, described transmission delay configuration module disposes respectively the transmission delay of the packet of multimedia broadcast-multicast service, and determines described timestamp according to described all maximum transmitting time delay from the transmission delay of radio network controller.
8. device according to claim 7 is characterized in that, described timestamp determination module is carried out following the processing when determining described timestamp:
The described current time is defined as Connection Frame Number, and determine described timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is described timestamp, Tc is the described current time, and represents with described Connection Frame Number, and mod represents that delivery calculates, T is described transmission delay, and Tp is the maximum occurrences+1 of described Connection Frame Number; Perhaps
The described current time is defined as System Frame Number, and determine described timestamp: Ts=(Tc+T) mod Tp by following formula, wherein, Ts is described timestamp, Tc is the described current time, and represents with described System Frame Number, and mod represents that delivery calculates, T is described transmission delay, and Tp is the maximum occurrences+1 of described System Frame Number.
9. according to claim 7 or 8 described devices, it is characterized in that described current time and described transmission delay meet the following conditions:
T mod N=0, wherein, mod represents that delivery calculates; N is the Transmission Time Interval of the transmission channel of described multimedia broadcast multicast data bag mapping, take the 10ms frame as unit; T is described current time or described transmission delay, take the 10ms frame as unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1764086A (en) * | 2004-10-21 | 2006-04-26 | 华为技术有限公司 | System and method for realizing wireless broadcast multicast service synchronizing delivery |
| WO2007028719A1 (en) * | 2005-09-08 | 2007-03-15 | Nokia Siemens Networks Gmbh & Co. Kg | Method for controlling a packet data transmission |
| CN101043641A (en) * | 2007-03-07 | 2007-09-26 | 中兴通讯股份有限公司 | Inter-RNC MBMS data synchronization method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1764086A (en) * | 2004-10-21 | 2006-04-26 | 华为技术有限公司 | System and method for realizing wireless broadcast multicast service synchronizing delivery |
| WO2007028719A1 (en) * | 2005-09-08 | 2007-03-15 | Nokia Siemens Networks Gmbh & Co. Kg | Method for controlling a packet data transmission |
| CN101043641A (en) * | 2007-03-07 | 2007-09-26 | 中兴通讯股份有限公司 | Inter-RNC MBMS data synchronization method and system |
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