CN101325586A - Method and apparatus for data transmission - Google Patents
Method and apparatus for data transmission Download PDFInfo
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- CN101325586A CN101325586A CNA2007101109406A CN200710110940A CN101325586A CN 101325586 A CN101325586 A CN 101325586A CN A2007101109406 A CNA2007101109406 A CN A2007101109406A CN 200710110940 A CN200710110940 A CN 200710110940A CN 101325586 A CN101325586 A CN 101325586A
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Abstract
The invention discloses a method for transmitting data, including the following steps: configuring Burst Type according to delay extension; packaging the data according to the Burst Type, and transmitting the packaged data. The invention also discloses a data transmission device, including a Burst Type configuring unit and a data packaging unit, wherein, the Burst Type configuring unit is used to configure Burst Type according to delay extension; while the data packaging unit is used to package the data according to the Burst Type configured by the Burst Type configuring unit. By configuring a Burst Type, the GP of the Burst Type is larger than 16Chips, and the applications scene whose delay extension is larger than 12.5[mu]s is ensured in the GP scope, accordingly preventing the disturbance to data receiving of user terminal and improving the accuracy of data receiving of user terminal.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of method and device of transfer of data.
Background technology
Along with developing rapidly of wireless communication technology, MBMS (Multimedia Broadcast MulticastService, multi-media broadcasting service) is widely used.MBMS is meant that the user receives digital sound, the video content of the forms of broadcasting with the form of channel or channel on the intelligent mobile terminal with operating system and video capability, for example TV etc.Wherein, TD-MBMS (Time Division MultimediaBroadcast Multicast Service, the time-division multimedia broadcast business) is a kind of TD-SCDMA of being based upon (Time Division Synchronous Code Division Multiple Access, TD SDMA) on the system platform, realize the solution of multi-media broadcasting service end to end, can under the prerequisite of the voice-and-data business that does not influence original system, provide the transmission channel of a higher rate for multimedia broadcasting.
At present, for the identical MBMS business of content, two kinds of data transmission method for uplink are arranged.A kind of is to adopt same frequency, same time slot, synchronized transmission identical content, and uses identical Midamble (pilot tone) sign indicating number and scrambler; Another kind is to adopt same frequency, same time slot, synchronized transmission identical content, but adopts original scrambler in each sub-district and Midamble sign indicating number.Adopt this two kinds of different sending methods, will require UE (UserEquipment, subscriber equipment) to support two kinds of different diversity foldings.
For first kind of sending method, can adopt SFN (Single Frequency Network, single frequency network) macro diversity mode.The SFN macro diversity mode is under the situation of the time slot employing single frequency network configuration of transmission broadcasting service, unified scrambler and Midamble sign indicating number are adopted in a plurality of adjacent sub-districts, the signal that just can guarantee each sub-district emission is identical, UE only needs the signal of a plurality of sub-districts emission is handled as multipath, can realize the grand diversity of SFN very simply.When adopting the SFN macro diversity mode in a plurality of sub-districts, to transmit broadcasting service, RNC (Radio Network Controller, radio network controller) is a plurality of sub-district unified distribution broadcasting service resources, and the scrambler and the Midamble sign indicating number of specifying this broadcasting service to use, by each base station of signaled and UE; Each sub-district uses these special codes to form the broadcasting service burst, and transmits on identical running time-frequency resource; After UE receives the same burst of transmitting simultaneously a plurality of sub-districts in the respective resources position, adopt the Midamble sign indicating number of appointment to carry out channel estimating, and adopt the scrambler of appointment that data are carried out descrambling, solve required broadcast service data.
Now, when the transmission broadcast service data, encapsulating the Burst Type (burst format) that these data adopt has only a kind of, the structure of this Burst Type as shown in Figure 1, comprise two Data Symbols (data field), Midamble territory and a GP (Guard Period, protection period); Wherein, each Data Symbols comprises 352chips (chip), and the Midamble territory comprises 144chips, and GP comprises 16chips.Because the size of each chips is 1/1.28 μ s (microsecond), so the size of GP is 16/1.28=12.5 μ s.According to R6LCR (Low Code Rate, low code check) MBMS simulating scenes parameter, in this parameter: the distance between the base station is 1386 meters, has 19 base stations, 57 sectors, and the correlation distance window that can use signal is 2620 meters, i.e. 8.7 μ s.So think that the GP of this Burst Type is enough big.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: suppose that than peak signal decay 25dB all be useful signal, and the delay of more existing scenes expansion has all surpassed 12.5 μ s, will receive data to user terminal like this and cause interference.In for example following 4 kinds of scenes, 95% delay expansion has all surpassed 12.5 μ s: a kind of scene is that the distance between the base station is 500 meters, have 37 base stations, the LTE of 111 sectors (Long Term Evolution, Long Term Evolution) MBSFN (MulticastBroadcast Single Frequency Network, multicast broadcast single frequency network) simulating scenes; Another kind of scene is that the distance between the base station is 2500 meters, has 37 base stations, the LTE MBSFN simulating scenes of 111 sectors; Another scene is that the distance between the base station is 1732 meters, has 37 base stations, the LTE MBSFN simulating scenes of 111 sectors; Another scene is that the distance between the base station is 1000 meters, has 37 base stations, the R6TDD of 111 sectors (Time Division Duplex, time division duplex) MBSFN simulating scenes.
Summary of the invention
The problem that the embodiment of the invention will solve provides a kind of method and device of transfer of data, can dispose the delay expansion of the GP of Burst Type greater than application scenarios, has prevented that user terminal is received data causes interference.
For achieving the above object, the technical scheme of the embodiment of the invention provides a kind of method of transfer of data, may further comprise the steps: according to postponing expanded configuration burst format Burst Type; Data are encapsulated according to described BurstType, and the data after the transmission encapsulation.
The technical scheme of the embodiment of the invention also provides a kind of device of transfer of data, comprises burst format dispensing unit and data encapsulation unit, and described burst format dispensing unit is used for according to postponing expanded configuration Burst Type; Described data encapsulation unit is used for the Burst Type of data according to described burst format dispensing unit configuration encapsulated.
An embodiment in the technique scheme has following advantage: the embodiment of the invention is according to postponing expanded configuration Burst Type, increased the size of GP, the delay expansion that makes all scenes is all in the scope of GP, thereby prevented that user terminal is received data causes interference, improved the accuracy of user terminal reception data.
Description of drawings
Fig. 1 is the structural representation of prior art Burst Type;
Fig. 2 is the method flow diagram of a kind of transfer of data of the embodiment of the invention;
Fig. 3 is the structural representation of a kind of Burst Type of the embodiment of the invention;
Fig. 4 is the method flow diagram of the another kind of transfer of data of the embodiment of the invention
Fig. 5 is the structural representation of the another kind of Burst Type of the embodiment of the invention;
Fig. 6 is the device schematic diagram of a kind of transfer of data of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
The method flow of a kind of transfer of data of the embodiment of the invention may further comprise the steps as shown in Figure 2:
Step s201, Burst Type is selected according to application scenarios in the base station.If the time delay expansion of described application scenarios, is then selected the Burst Type of GP greater than 16Chips greater than 12.5 μ s; If the time delay expansion of described application scenarios is less than or equal to 12.5 μ s, then select GP to equal the Burst Type of 16Chips.
Application scenarios in the present embodiment is that the distance between the base station is 2500 meters, have 37 base stations, the LTE MBSFN simulating scenes of 111 sectors, the delay expansion of this scene has surpassed 12.5 μ s, but less than 37.5 μ s, therefore the delay according to maximum expands to 37.5 μ s, selects the Burst Type of GP greater than 16Chips.
Step s202, base station configuration also issues selected Burst Type.The structure of this Burst Type comprises two Data Symbols, a Midamble territory and a GP as shown in Figure 3; Wherein, each Data Symbols comprises 320chips, and the Midamble territory comprises 176chips, and GP comprises 48chips.Therefore the size of GP is 48/1.28=37.5 μ s, again because the delay of this scene expansion less than 37.5 μ s, so the GP of this Burst Type is enough big, can receive data to user terminal and cause interference.
During present embodiment configuration Burst Type, need satisfy following 4 conditions:
Condition 1, the summation of the number of chips of four parts of this Burst Type is 864.
Condition 2, the number of chips of this each data field of Burst Type are the integral multiples of SF (Spread Factor, spreading factor).Because the number of up SF is 1,2,4,8 or 16, the number of descending SF is 1 or 16, and maximum SF is 16, thus the number of chips of each data field so long as 16 integral multiple get final product.
Condition 3, the GP of this Burst Type equal maximum delay expansion and downstream-to-upstream change-over time with.Because it is descending that MBSFN Burst only is used for, in the TD-SCDMA frame structure, MBSFNBurst can not be present in a last descending time slot, and have special GP to be used for the change-over time of downstream-to-upstream inside the TD-SCDMA frame structure, so equaling maximum delay, expands the GP of this Burst Type.
Condition 4, the Midamble territory of this Burst Type be basic Midamble sign indicating number and ChannelEstimation Window (channel estimation window) and.The general Channel Estimation Window that selects equals maximum delay expansion, and the basic Midamble code length of TD-SCDMA is 128chips.
The process of present embodiment configuration Burst Type is as follows:
At first, dispose the GP of Burst Type according to the delay expansion of maximum.Because the GP of this Burst Type equals maximum delay expansion, and maximum delay expands to 37.5 μ s in the present embodiment, so select GP=37.5 * 1.28=48chips, again because the quantity of chip must be integer, so GP configuring is 48chips.
Then according to basic Midamble sign indicating number and maximum delay expansion, the Midamble territory of configuration Burst Type.Because the Midamble territory of this Burst Type be basic Midamble sign indicating number and ChannelEstimation Window and, and Channel Estimation Window equals maximum delay expansion, basic Midamble code length is 128chips, so select Midamble territory=128+37.5 * 1.28=176chips, because the quantity of chip must be integer, therefore disposing the Midamble territory is 176chips again.
At last according to the summation of the chips number of Burst Type, two data fields of configuration Burst Type.Because the summation of the number of chips of four parts of this Burst Type is 864, the summation of the number of chips of two data fields is 864-48-176=640; Again because the number of chips of each data field of this Burst Type is 16 integral multiple, and the size of two data fields should be approaching, so the number of chips of two data fields is identical or differ 16, therefore disposing two data fields all is 320chips.
Step s203 encapsulates data according to this Burst Type, and the data after the transmission encapsulation.
Because for postponing to expand the application scenarios that is less than or equal to 12.5 μ s, also can use the Burst Type of GP greater than 16Chips, so also can directly be configured to the Burst Type of GP in the present embodiment without the selection course of step s201 greater than 16Chips.
Present embodiment is by configuration Burst Type, the GP that makes described Burst Type is 48chips, can guarantee to postpone to expand greater than the application scenarios of 12.5 μ s also in the scope of GP, thereby prevented that user terminal is received data causes interference, improve the accuracy that user terminal receives data.
The method flow of the another kind of transfer of data of the embodiment of the invention may further comprise the steps as shown in Figure 4:
Step s401, Burst Type is selected according to the network planning in the base station.Because the delay of general application scenarios expansion is all less than 31 μ s, for example following 4 kinds postpone the scene that expansion surpasses 12.5 μ s, it postpones expansion all less than 31 μ s: a kind of scene is that the distance between the base station is 500 meters, has 37 base stations, the LTE MBSFN simulating scenes of 111 sectors; Another kind of scene is that the distance between the base station is 2500 meters, has 37 base stations, the LTE MBSFN simulating scenes of 111 sectors; Another scene is that the distance between the base station is 1732 meters, has 37 base stations, the LTE MBSFN simulating scenes of 111 sectors; Another scene is that the distance between the base station is 1000 meters, has 37 base stations, the R6TDD MBSFN simulating scenes of 111 sectors.Therefore present embodiment expands to 31 μ s according to the delay of maximum, selects the Burst Type of GP greater than 16Chips.
Step s402, base station configuration also issues selected Burst Type.The structure of this Burst Type comprises two Data Symbols, a Midamble territory and a GP as shown in Figure 5; Wherein, a Data Symbols comprises 336chips, and another Data Symbols comprises 320chips, and the Midamble territory comprises 168chips, and GP comprises 40chips.Therefore the size of GP is 40/1.28=31.25 μ s, again because the delay of general application scenarios expansion all less than 31 μ s, so the GP of this Burst Type is enough big, can receive data to user terminal and cause interference.
In the present embodiment, the base station also needs to satisfy 4 conditions that propose among the step s202 when configuration Burst Type.The process of present embodiment configuration Burst Type is as follows:
Because the GP of this Burst Type equals maximum delay expansion, and maximum delay expands to 31 μ s in the present embodiment, so select GP=31 * 1.28=39.68chips, again because the quantity of chip must be integer, so GP configuring is 40chips.
Because the Midamble territory of this Burst Type be basic Midamble sign indicating number and ChannelEstimation Window and, and Channel Estimation Window equals maximum delay expansion, basic Midamble code length is 128chips, so select Midamble territory=128+31 * 1.28=167.68chips, because the quantity of chip must be integer, therefore disposing the Midamble territory is 168chips again.
Because the summation of the number of chips of four parts of this Burst Type is 864, the summation of the number of chips of two data fields is 864-40-168=656; Again because the number of chips of each data field of this Burst Type is 16 integral multiple, and the size of two data fields should be approaching, so the number of chips of two data fields is identical or differ 16, therefore disposing a data field is 336chips, and another data field is 320chips.
Step s403 encapsulates data according to this Burst Type, and the data after the transmission encapsulation.
Because for postponing to expand the application scenarios that is less than or equal to 12.5 μ s, also can use the Burst Type of GP greater than 16Chips, so also can directly be configured to the Burst Type of GP in the present embodiment without the selection course of step s401 greater than 16Chips.
Present embodiment is by configuration Burst Type, the GP that makes described Burst Type is 40chips, can guarantee to postpone to expand greater than the application scenarios of 12.5 μ s also in the scope of GP, thereby prevented that user terminal is received data causes interference, improve the accuracy that user terminal receives data.
The device of a kind of transfer of data of the embodiment of the invention as shown in Figure 6, comprise burst format selected cell 61, burst format dispensing unit 62 and data encapsulation unit 63, wherein burst format dispensing unit 62 communicates with data encapsulation unit 63 with burst format selected cell 61 respectively and is connected.
Burst format selected cell 61 is used for selecting Burst Type according to the application scenarios or the network planning, and selection result is sent to burst format dispensing unit 62.When selecting Burst Type, if the time delay expansion of described application scenarios greater than 12.5 μ s, is then selected the BurstType of GP greater than 16Chips according to application scenarios; If the time delay expansion of described application scenarios is less than or equal to 12.5 μ s, then select GP to equal the Burst Type of 16Chips.
Burst format dispensing unit 62 is used for the selection result according to 61 transmissions of burst format selected cell, configuration Burst Type.When described selection result when adopting GP greater than the Burst Type of 16Chips, the Data Symbols of 62 couples of described Burst Type of burst format dispensing unit, Midamble territory and GP are configured respectively.In layoutprocedure, need satisfy following 4 conditions:
Condition 1, the summation of the number of chips of four parts of this Burst Type is 864.
Condition 2, the number of chips of this each data field of Burst Type is the integral multiple of SF.Because the number of up SF is 1,2,4,8 or 16, the number of descending SF is 1 or 16, and maximum SF is 16, thus the number of chips of each data field so long as 16 integral multiple get final product.
Condition 3, the GP of this Burst Type equal maximum delay expansion and downstream-to-upstream change-over time with.Because it is descending that MBSFN Burst only is used for, in the TD-SCDMA frame structure, MBSFNBurst can not be present in a last descending time slot, and have special GP to be used for the change-over time of downstream-to-upstream inside the TD-SCDMA frame structure, so equaling maximum delay, expands the GP of this Burst Type.
Condition 4, the Midamble territory of this Burst Type be basic Midamble sign indicating number and ChannelEstimation Window and.The general Channel Estimation Window that selects equals maximum delay expansion, and the basic Midamble code length of TD-SCDMA is 128chips.
Present embodiment by select and configuration Burst Type, make to postpone expansion greater than the application scenarios of 12.5 μ s also in the scope of GP, thereby prevented that user terminal is received data causes interference, improved the accuracy that user terminal receives data.
The above only is embodiments of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1, a kind of method of transfer of data is characterized in that, may further comprise the steps:
According to postponing expanded configuration burst format Burst Type;
Data are encapsulated according to described Burst Type, and the data after the transmission encapsulation.
2, the method for transfer of data according to claim 1 is characterized in that described configuration Burst Type specifically comprises:
According to the delay expansion of maximum, dispose the protection period GP of described Burst Type; According to basic pilot tone Midamble sign indicating number and maximum delay expansion, the Midamble territory that disposes described Burst Type;
According to the summation of the chip chips number of Burst Type, dispose two data fields of described Burst Type.
3, as the method for transfer of data as described in the claim 2, it is characterized in that the GP of described Burst Type is greater than 16Chips.
4, as the method for transfer of data as described in the claim 2, it is characterized in that the number of chips of each data field of described Burst Type is 16 multiple.
5, as the method for transfer of data as described in the claim 2, it is characterized in that the number of chips of two data fields of described Burst Type is identical or differ 16.
6, the method for transfer of data according to claim 1 is characterized in that, before described configuration Burst Type, also comprises: select Burst Type according to the application scenarios or the network planning.
7, as the method for transfer of data as described in the claim 6, it is characterized in that, describedly select Burst Type specifically to comprise according to application scenarios:
If the time delay expansion of described application scenarios, is then selected the Burst Type of GP greater than 16Chips greater than 12.5 microseconds;
If the time delay expansion of described application scenarios is less than or equal to 12.5 microseconds, then select GP to equal the Burst Type of 16Chips.
8, a kind of device of transfer of data is characterized in that, comprises burst format dispensing unit and data encapsulation unit,
Described burst format dispensing unit is used for according to postponing expanded configuration Burst Type;
Described data encapsulation unit is used for the BurstType of data according to described burst format dispensing unit configuration encapsulated.
9, as the device of transfer of data as described in the claim 8, it is characterized in that, also comprise the burst format selected cell, be used for selecting Burst Type, and selection result is sent to described burst format dispensing unit according to the application scenarios or the network planning.
10, as the device of transfer of data as described in the claim 8, it is characterized in that the GP of described Burst Type is greater than 16Chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101109406A CN101325586A (en) | 2007-06-11 | 2007-06-11 | Method and apparatus for data transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101109406A CN101325586A (en) | 2007-06-11 | 2007-06-11 | Method and apparatus for data transmission |
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| CNA2007101109406A Pending CN101325586A (en) | 2007-06-11 | 2007-06-11 | Method and apparatus for data transmission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102238606A (en) * | 2010-04-30 | 2011-11-09 | 中兴通讯股份有限公司 | Method and system for processing signals based on frame structure extension |
| WO2017024943A1 (en) * | 2015-08-11 | 2017-02-16 | 中兴通讯股份有限公司 | Transmission method and apparatus |
-
2007
- 2007-06-11 CN CNA2007101109406A patent/CN101325586A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102238606A (en) * | 2010-04-30 | 2011-11-09 | 中兴通讯股份有限公司 | Method and system for processing signals based on frame structure extension |
| CN102238606B (en) * | 2010-04-30 | 2016-03-30 | 中兴通讯股份有限公司 | A kind of signal processing method based on frame structure extension and system |
| WO2017024943A1 (en) * | 2015-08-11 | 2017-02-16 | 中兴通讯股份有限公司 | Transmission method and apparatus |
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Open date: 20081217 |