CN1852049A - Method and system for realizing empty pont synchronous emitting data - Google Patents
Method and system for realizing empty pont synchronous emitting data Download PDFInfo
- Publication number
- CN1852049A CN1852049A CN 200510137433 CN200510137433A CN1852049A CN 1852049 A CN1852049 A CN 1852049A CN 200510137433 CN200510137433 CN 200510137433 CN 200510137433 A CN200510137433 A CN 200510137433A CN 1852049 A CN1852049 A CN 1852049A
- Authority
- CN
- China
- Prior art keywords
- tti
- time interval
- transmission time
- frame number
- radio network
- 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.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
This invention discloses a method for realizing empty synchronization including: a radio network controller gets a time deviation between its frame number and the connection frame numbers of the front access channels of the areas based on the synchronized process of transmission channels, thus, the time delay difference among different areas is less than half transmission time interval based on the deviation and the offset volume of the transmission time interval is got. This invention also discloses a method and a system for realizing empty synchronous data sending.
Description
Technical field
The present invention relates to a kind of communication technology, relate in particular to a kind of method and system of realizing empty pont synchronous emitting data.
Background technology
Along with the communication service development, the application of MBMS business is also more and more wider, people are also high more to the requirement of MBMS quality of service, when being in cell edge when moving of UE (user terminal), owing to may need to switch in this zone, when switching, need therefore, fluctuate maximum according to the signal of sub-district in the bearing mode of eating dishes without rice or wine to adopt (as PTP carrying or PTM carrying) merger activity sub-district at the signal quality that this regional UE received.
In the prior art, can support the soft handover function when MBMS (BroadCast MultiCast Service) is professional when eating dishes without rice or wine to adopt PTP (point-to-point) carrying, the same user's of different districts descending PTP carrying can realize soft merging.When the MBMS business when eating dishes without rice or wine to adopt PTM (putting multiple spot) carrying, can support the soft merging of neighbor cell same MBMS business, described sub-district belongs to same cell set, and belongs to same RNC (radio network controller).When utilizing PTM carrying MBMS professional, same PDCP (PDCP) and UM RLC (control of Unacknowledged Mode Radio Link) entity are shared in each sub-district in the same cell set.UE (user terminal) receives the same MBMS business from each sub-district PTM carrying, realizes soft merging according to the UE side that is configured in of RNC.The described soft log-likelihood ratio (LLR) of merging into merges, and carries out at a transmission channel, and the transport channel data that is used for each sub-district of soft merging must be in full accord.Unified again decoding after data merge before the decoding of each sub-district.The maximum delay difference of the identical data arrival UE of each sub-district is not more than 1TTI when soft the merging, so network side must satisfy the requirement of each sub-district synchronized transmission in the cell set when sending the MBMS business datum.The synchronizing process of descending transmission channel is described below.
As shown in Figure 1, in step 10, RNC (radio network controller) sends DL SYNCHRONISATION (downlink synchronization) control frame for Node B (base station), initiates synchronizing process, comprises target CFN (Connection Frame Number) in the control frame.In step 20, after Node B receives control frame from RNC, calculate the actual deviation between constantly of moment of receiving this control frame and target CFN, this deviation is ToA (time of advent).Node B sends UL SYNCHRONISATION (uplink synchronisation) control frame to RNC, comprises the target CFN in ToA and the DL SYNCHRONISATION control frame in the control frame.
In the prior art, also not how in MBMS when supporting soft mergings, how to reach the synchronized transmission of the MBMS business of the interior different districts of cell set.
Summary of the invention
The purpose of this invention is to provide a kind of method and system of realizing empty pont synchronous emitting data, can realize the synchronized transmission of the MBMS business of different districts in the cell set.
The invention discloses a kind of method that realizes air interface synchronization, comprising:
A, radio network controller be by the transport channel synchronization process, obtains the time deviation T between the Connection Frame Number of the radio network controller frame number of radio network controller and each cell forward access channel
DiffTotal
B, according to described time deviation T
DiffTotalMake the delay inequality scheduled time between the different districts, and obtain departure OFF*T between Transmission Time Interval
TTI
Described step B specifically comprises:
B1, by described time deviation T
DiffTotalObtain departure OFF*T between Transmission Time Interval
TTIWith departure T in the Transmission Time Interval
Diff
B2, according to T
DiffAdjust the skew of the relative radio network controller frame number of Connection Frame Number of forward access channel, make delay inequality between the different districts less than half Transmission Time Interval, and obtain departure OFF*T between Transmission Time Interval
TTI
Described step B1 specifically comprises:
T
Diff=T
DiffTotalmod?T
TTI
OFF=(T
DiffTotal-T
Diff)/T
TTI
Wherein, T
TTILength for Transmission Time Interval.
Described step B2 specifically comprises: if T
DiffScope is 0 to T
TTIBetween/2, the Connection Frame Number of getting forward access channel is T with respect to the deviation of radio network controller frame number
TTI, rebulid the forward access channel of this sub-district at/2 o'clock.
The described scheduled time is half Transmission Time Interval.
The invention also discloses a kind of method that realizes empty pont synchronous emitting data, comprising:
C, radio network controller are determined each transport block set that sends;
D, determined transport block set is added timestamp RFN_Ct;
The MACm scheduling unit of E, cell i is (RFN_Ct-OFFi*N at Connection Frame Number
TTI) be engraved in during mod 256 and send described transport block set on the FACH channel; OFFi*N wherein
TTIBe departure between the Transmission Time Interval of cell i.
Described timestamp is (RFN_C+ (N
TTI* N
Delay)) mod 256,
Wherein: (N
TTI* N
Delay) represent that this transport block set is combined in current time and postpones N
DelayOn forward access channel, send N behind the individual Transmission Time Interval
DelayIt is a constant.
Described OFF can obtain by following step:
T
Diff=T
DiffTotalmod?T
TTI
OFF=(T
DiffTotal-T
Diff)/T
TTI
Wherein, T
TTILength for Transmission Time Interval.
The invention also discloses a kind of system that realizes empty pont synchronous emitting data, comprising:
Radio network controller is used for initiating synchronizing process to the base station, and according to from departure OFF*T between the Connection Frame Number of each cell forward access channel of base station and the acquisition of the time deviation between radio network controller frame number Transmission Time Interval
TTIWith departure T in the Transmission Time Interval
Diff, and according to departure T in the described Transmission Time Interval
DiffMake delay inequality between the different districts less than half Transmission Time Interval, according to departure OFF*T between Transmission Time Interval
TTISend data;
The base station is used to obtain the Connection Frame Number of cell forward access channel and the time deviation between the radio network controller frame number, and this time deviation is issued radio network controller.
According to the present invention, can realize that the same MBMS service data of different districts should be greater than T in the delay inequality of each sub-district transmission
TTI/ 2.Thereby make MBMS business each sub-district synchronized transmission in a cell set, satisfy the delay inequality restriction of soft merging.
Description of drawings
Fig. 1 shows the synchronous flow chart of descending transmission channel;
Fig. 2 shows the schematic diagram that concerns between the RFN of the embodiment of the invention and the CFN;
Fig. 3 shows the synchronizing process of the RNC transmission MBMS business datum of the embodiment of the invention.
Embodiment
Understand and realization the present invention the existing embodiments of the invention of describing in conjunction with the accompanying drawings for the ease of persons skilled in the art.
Basic thought of the present invention is, RNC obtains RNC by the transport channel synchronization process RFN (RNC frame number) and each sub-district send the time migration between the CFN of FACH (forward access channel) of MBMS business, utilize the synchronized transmission of this time migration realization MBMS business each sub-district in RNC then.
The application's description for convenience, it is as follows to define each symbol:
T
FrameBe radio frames length, value 10ms.
RFN is the RNC frame number, and span is 0 to 4095; Definition RFN_C is RFN mod 256, and then the RFN_C span is 0 to 255.
CFN is the FACH frame number, and span is 0 to 255.
T
256Be the repetition period of RFN_C, CFN, value is 256*T
FrameEqual 2560ms.
T
TTIBe TTI length, value is generally 80ms or 40ms.
N
TTIBe the radio frames number that a TTI can transmit, value T
TTI/ T
Frame
The time migration relation of obtaining between RFN and the CFN is described below, supposes that CFN is 0 millisecond with respect to the deviation of SFN (System Frame Number also claims the sub-district frame number), after the FACH of each sub-district set up, RNC initiated the FACH channel synchronization process of each sub-district.
Fig. 2 shows the schematic diagram that concerns between RFN and the CFN; As shown in Figure 2, RNC sends DL SYNCHRONISATION control frame to Node B in the moment of RFN_Cr, wherein, supposes that the CFN value in the control frame is 0.Suppose that now control frame does not have transmission delay between RNC and NodeB, the CFN that NodeB calculates the moment receive DL SYNCHRONISATION control frame and FACH is that the time deviation between moment of 0 is ToA, send UL SYNCHRONISATION control frame then to RNC, comprise ToA in the described control frame.
After RNC obtained ToA, the CFN of calculating FACH with respect to the time deviation of the RFN_C of RNC was:
T
DiffTotal=(RFN_Cr*T
Frame+ToA)mod?T
256
According to T
DiffTotalCan obtain following two parameters:
T
Diff=T
DiffTotal?mod?T
TTI
OFF=(T
DiffTotal-T
Diff)/T
TTI
To know that by above-mentioned formula the time deviation between CFN and the RFN_C is T
DiffTotal, comprise two parts: departure OFF*T between Transmission Time Interval
TTIWith departure T in the Transmission Time Interval
DiffWherein, T
DiffSpan 0 to T
TTIBetween.According to the present invention, if T
DiffScope 0 to T
TTIBetween/2, the CFN that gets FACH is T with respect to the deviation of RFN
TTI/ 2, rebulid the FACH channel of this sub-district.At last can be so that the T of all sub-districts
DiffSpan at T
TTI/ 2 to T
TTIBetween, and obtaining the OFF of each sub-district, OFF shows the frame for wireless transmission time interval number that differs between CFN and the RFN_C.
The synchronizing process that RNC sends the MBMS business datum is described below.
Step 1, RNC obtain the MBMS business datum from SGSN (Serving GPRS Support Node).
The MACm buffer memory of step 6, sub-district sends the data block that scheduling unit is sent.
The MACm scheduling unit of each sub-district is (RFN_Ct-OFFi*N at CFN among step 7-8, the RNC
TTI) be engraved in during mod 256 and send this transport block set, wherein OFFi*T on the FACH channel
TTIBe departure between the Transmission Time Interval of cell i.
The invention also discloses a kind of system that realizes empty pont synchronous emitting data, comprise: radio network controller, be used for initiating synchronizing process to the base station, and according to from departure OFF*T between the Connection Frame Number of each cell forward access channel of base station and the acquisition of the time deviation between radio network controller frame number Transmission Time Interval
TTIWith departure T in the Transmission Time Interval
Diff, and according to departure T in the described Transmission Time Interval
DiffMake delay inequality between the different districts less than half Transmission Time Interval, according to departure OFF*T between Transmission Time Interval
TTISend data; The base station is used to obtain the Connection Frame Number of cell forward access channel and the time deviation between the radio network controller frame number, and this time deviation is issued radio network controller.
Should be noted that according to the present invention the delay inequality between the different districts gets final product less than half Transmission Time Interval, but delay inequality is more little, the synchronous effect between each sub-district is good more.
According to the present invention, can realize that the same MBMS service data of different districts should be greater than T in the delay inequality of each sub-district transmission
TTI/ 2.Thereby make MBMS business each sub-district synchronized transmission in a cell set, satisfy the delay inequality restriction of soft merging.
Though described the present invention by embodiment, those of ordinary skills know, under the situation that does not break away from god of the present invention and essence, just can make the present invention that many distortion and variation are arranged, and scope of the present invention is limited to the appended claims.
Claims (9)
1, a kind of method that realizes air interface synchronization is characterized in that, comprising:
A, radio network controller be by the transport channel synchronization process, obtains the time deviation T between the Connection Frame Number of the radio network controller frame number of radio network controller and each cell forward access channel
DiffTotal
B, according to described time deviation T
DiffTotalMake delay inequality between the different districts less than the scheduled time, and obtain departure OFF*T between Transmission Time Interval
TTI
2, the method for realization air interface synchronization according to claim 1 is characterized in that, described step B specifically comprises:
B1, by described time deviation T
DiffTotalObtain departure OFF*T between Transmission Time Interval
TTIWith departure T in the Transmission Time Interval
Diff
B2, according to T
DiffThe skew of the relative radio network controller frame number of Connection Frame Number of whole forward access channel makes delay inequality between the different districts less than half Transmission Time Interval, and obtains departure OFF*T between Transmission Time Interval
TTI
3, the method for realization air interface synchronization according to claim 2 is characterized in that, described step B1 specifically comprises:
T
Diff=T
DiffTotal?mod?T
TTI
OFF=(T
DiffTotal-T
Diff)/T
TTI
Wherein, T
TTILength for Transmission Time Interval.
4, the method for realization air interface synchronization according to claim 2 is characterized in that, described step B2 specifically comprises: if T
DiffScope is 0 to T
TTIBetween/2, the Connection Frame Number of getting forward access channel is T with respect to the deviation of radio network controller frame number
TTI, rebulid the forward access channel of this sub-district at/2 o'clock.
According to the method for the wherein arbitrary described realization air interface synchronization of claim 1 to 4, it is characterized in that 5, the described scheduled time is half Transmission Time Interval.
6, a kind of method that realizes empty pont synchronous emitting data is characterized in that, comprising:
C, radio network controller are determined each transport block set that sends;
D, determined transport block set is added timestamp RFN_Ct;
The MACm scheduling unit of E, cell i is (RFN_Ct-OFFi*N at Connection Frame Number
TTI) be engraved in during mod 256 and send described transport block set on the FACH channel; OFFi*N wherein
TTIBe departure between the Transmission Time Interval of cell i.
7, the method for realization empty pont synchronous emitting data according to claim 6 is characterized in that, described timestamp is (RFN_C+ (N
TTI* N
Delay)) mod 256,
Wherein: (N
TTI* N
Delay) represent that this transport block set is combined in current time and postpones N
DelayOn forward access channel, send N behind the individual Transmission Time Interval
DelayIt is a constant.
8, the method for realization empty pont synchronous emitting data according to claim 6 is characterized in that, described OFF can obtain by following step:
T
Diff=T
DiffTotal?mod?T
TTI
OFF=(T
DiffTotal-T
Diff)/T
TTI
Wherein, T
TTILength for Transmission Time Interval.
9, a kind of system that realizes empty pont synchronous emitting data is characterized in that, comprising:
Radio network controller is used for initiating synchronizing process to the base station, and according to from departure OFF*T between the Connection Frame Number of each cell forward access channel of base station and the acquisition of the time deviation between radio network controller frame number Transmission Time Interval
TTIWith departure T in the Transmission Time Interval
Diff, and according to departure T in the described Transmission Time Interval
DiffMake delay inequality between the different districts less than half Transmission Time Interval, according to departure OFF*T between Transmission Time Interval
TTISend data;
The base station is used to obtain the Connection Frame Number of cell forward access channel and the time deviation between the radio network controller frame number, and this time deviation is issued radio network controller.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200510137433A CN100583693C (en) | 2005-12-30 | 2005-12-30 | Method and system for realizing empty port synchronous emitting data |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200510137433A CN100583693C (en) | 2005-12-30 | 2005-12-30 | Method and system for realizing empty port synchronous emitting data |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1852049A true CN1852049A (en) | 2006-10-25 |
CN100583693C CN100583693C (en) | 2010-01-20 |
Family
ID=37133520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN200510137433A Expired - Fee Related CN100583693C (en) | 2005-12-30 | 2005-12-30 | Method and system for realizing empty port synchronous emitting data |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN100583693C (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009082937A1 (en) * | 2007-12-19 | 2009-07-09 | Huawei Technologies Co., Ltd. | Transmission method, device and system of mbms service data |
WO2009132565A1 (en) * | 2008-04-30 | 2009-11-05 | 中兴通讯股份有限公司 | Synchronization method of common control message among network elements |
CN101043265B (en) * | 2007-04-27 | 2010-11-24 | 华为技术有限公司 | Method for realizing multimedia broadcasting and multicasting service data synchronized transmission |
CN101247315B (en) * | 2007-02-12 | 2011-06-01 | 上海贝尔阿尔卡特股份有限公司 | Content synchronization method and apparatus for single-frequency network transmission |
CN101051889B (en) * | 2007-03-23 | 2011-08-24 | 中兴通讯股份有限公司 | Method and system for realizing service data consistence between network controllers |
CN101370175B (en) * | 2007-08-15 | 2011-12-28 | 华为技术有限公司 | Method for determining data sending time, multicast grouping method, apparatus and system |
CN101360282B (en) * | 2007-07-31 | 2012-01-11 | 中兴通讯股份有限公司 | Transmission method for multicast broadcast multimedia service |
CN101299822B (en) * | 2007-04-30 | 2012-07-04 | 华为技术有限公司 | System, method, equipment and apparatus for synchronous transmission |
CN101262634B (en) * | 2007-03-05 | 2012-09-05 | 中兴通讯股份有限公司 | Transmission method for multimedia broadcast and multicast service in TD-SCDMA system |
WO2013067655A1 (en) * | 2011-11-11 | 2013-05-16 | Telefonaktiebolaget L M Ericsson (Publ) | Sync interval determination |
RU2546198C1 (en) * | 2011-02-15 | 2015-04-10 | Телефонактиеболагет Л М Эрикссон (Пабл) | Methods for time synchronisation in communication networks |
US9538527B2 (en) | 2011-11-04 | 2017-01-03 | Huawei Technologies Co., Ltd | Method for determining transmission time interval, base station, and radio network controller |
US10075258B2 (en) | 2012-08-22 | 2018-09-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Distributing path delay data in a connection-oriented communications network |
US10148539B2 (en) | 2012-09-06 | 2018-12-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Use of common public radio interface over asymmetric networks |
-
2005
- 2005-12-30 CN CN200510137433A patent/CN100583693C/en not_active Expired - Fee Related
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101247315B (en) * | 2007-02-12 | 2011-06-01 | 上海贝尔阿尔卡特股份有限公司 | Content synchronization method and apparatus for single-frequency network transmission |
CN101262634B (en) * | 2007-03-05 | 2012-09-05 | 中兴通讯股份有限公司 | Transmission method for multimedia broadcast and multicast service in TD-SCDMA system |
CN101051889B (en) * | 2007-03-23 | 2011-08-24 | 中兴通讯股份有限公司 | Method and system for realizing service data consistence between network controllers |
CN101043265B (en) * | 2007-04-27 | 2010-11-24 | 华为技术有限公司 | Method for realizing multimedia broadcasting and multicasting service data synchronized transmission |
CN101299822B (en) * | 2007-04-30 | 2012-07-04 | 华为技术有限公司 | System, method, equipment and apparatus for synchronous transmission |
CN101360282B (en) * | 2007-07-31 | 2012-01-11 | 中兴通讯股份有限公司 | Transmission method for multicast broadcast multimedia service |
CN101370175B (en) * | 2007-08-15 | 2011-12-28 | 华为技术有限公司 | Method for determining data sending time, multicast grouping method, apparatus and system |
WO2009082937A1 (en) * | 2007-12-19 | 2009-07-09 | Huawei Technologies Co., Ltd. | Transmission method, device and system of mbms service data |
WO2009132565A1 (en) * | 2008-04-30 | 2009-11-05 | 中兴通讯股份有限公司 | Synchronization method of common control message among network elements |
US8483205B2 (en) | 2008-04-30 | 2013-07-09 | Zte Corporation | Synchronization method of common control message among network elements |
US9686034B2 (en) | 2011-02-15 | 2017-06-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods of time synchronization in communications networks |
RU2546198C1 (en) * | 2011-02-15 | 2015-04-10 | Телефонактиеболагет Л М Эрикссон (Пабл) | Methods for time synchronisation in communication networks |
US9538527B2 (en) | 2011-11-04 | 2017-01-03 | Huawei Technologies Co., Ltd | Method for determining transmission time interval, base station, and radio network controller |
WO2013067655A1 (en) * | 2011-11-11 | 2013-05-16 | Telefonaktiebolaget L M Ericsson (Publ) | Sync interval determination |
US9769775B2 (en) | 2011-11-11 | 2017-09-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Sync interval determination |
US10075258B2 (en) | 2012-08-22 | 2018-09-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Distributing path delay data in a connection-oriented communications network |
US10148539B2 (en) | 2012-09-06 | 2018-12-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Use of common public radio interface over asymmetric networks |
Also Published As
Publication number | Publication date |
---|---|
CN100583693C (en) | 2010-01-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1852049A (en) | Method and system for realizing empty pont synchronous emitting data | |
JP4617352B2 (en) | Method and apparatus for scheduling and synchronizing multimedia broadcast / multicast services | |
EP1643786A1 (en) | Method and apparatus for partial combining of multimedia broadcast/multicast service data | |
JP5184698B2 (en) | Method for synchronizing common control messages between network elements | |
EP2161946B1 (en) | Method for realizing mbms tdm and the information transmission method thereof | |
EP2230801B1 (en) | Method for sending and receiving multimedia operation data, base station device and user device | |
EP2262182B1 (en) | Method for synchronizing a gateway and base stations and the corresponding gateway and base station | |
CN1943264A (en) | Advanced handover in phased-shifted and time-sliced networks | |
JP2006304294A (en) | Method of data transmission in mobile communication system | |
JP5199310B2 (en) | Method and apparatus for processing MBMS dynamic scheduling information | |
CN101043641A (en) | Inter-RNC MBMS data synchronization method and system | |
EP2442523B1 (en) | Scheduling processing method for multimedia broadcast and multicast service and lower-layer network elements | |
CN101043265A (en) | Method for realizing multimedia broadcasting and multicasting service data synchronized transmission | |
CN1943138A (en) | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service | |
EP2346204B1 (en) | Method and apparatus for synchronization processing | |
CN1905398A (en) | Broadcasting/multicasting service transmitting method for TDD system | |
CN101035319A (en) | Multi-media broadcast and multicast service transmitting and receiving method under the time division duplex mode | |
CN1728881A (en) | The method that control data sends | |
EP2426958A1 (en) | Method, bm-sc and base station for multiplexing mbms services in mbsfn | |
CN1874187A (en) | Method for adjusting time for sending downgoing data frame in synchronous process of transmission channel | |
CN101651488A (en) | Synergistic method for element locations of multimedia broadcast multicasting services | |
CN102014339A (en) | Method, device and system for configuring multimedia broadcast multicast service (MBMS) synchronization |
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 | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20161230 |