CN101394576B - Synchronous base station, wireless transmission communication system and data transmission method - Google Patents
Synchronous base station, wireless transmission communication system and data transmission method Download PDFInfo
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- CN101394576B CN101394576B CN2007100302586A CN200710030258A CN101394576B CN 101394576 B CN101394576 B CN 101394576B CN 2007100302586 A CN2007100302586 A CN 2007100302586A CN 200710030258 A CN200710030258 A CN 200710030258A CN 101394576 B CN101394576 B CN 101394576B
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Abstract
The invention provides a synchronous base station, which comprises a configuration memory cell and a transmission processing unit, wherein, transmission configuration information of the synchronous base station is stored in the configuration memory cell; the transmission configuration information comprises cell configuration information which transmits data for terrestrial links in a packetizing manner; the cell configuration information comprises time information of transmitting data according to the cells in a staggered manner based on the synchronous base station; and the transmission processing unit is used for the data transmission according to the transmission configuration information, wherein, the packetizing data transmission is performed on the time information of transmitting data according to the cells in a staggered manner for the terrestrial links. In addition, a wireless transmission communication system and a data transmission method thereof are also disclosed. The synchronous base station, the wireless transmission communication system and the data transmission method thereof reduce the data burst problem that all cells of the synchronous base station transmit business data at the same time when the synchronous base station transmits data in the wireless transmission communication system in a synchronous base station, and reduce the time delay and the jitters of the packet data transmission.
Description
Technical field
The present invention relates to wireless communication technology field, in particular, the present invention relates to a kind of synchronising base station, wireless transmission communication system and data transmission method.
Background technology
Wireless transmission communication system typically refers to any one wireless communication user when its service area is initiated wireless transmission, starts the telecommunication system of wireless data transmission.Typical wireless transmission communication system comprises employing time division multiplexing (Time-Division Multiplexing; TDM) wireless communication system and adopt CDMA multiplexing (Code Division Multiple Access, CDMA) or the communication system of other multiplex modes.Wherein include global system for mobile communications (Global System for Mobile communications for the wireless transmission communication system that adopts the TDM mode; GSM) and TD SDMA insert (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA) communication system etc., general; In the time-multiplexed wireless communication system; The Radio Link transmitting data is the mode that adopts the TDM exchange, is example with traditional G SM wireless communication system, and the transmission of the terrestrial links of base station is the mode that adopts the TDM exchange; The bandwidth that fixing this channel of distribution needs on each Traffic Channel; When will transmit, for the transfer resource of this channel allocation can not be distributed to other channel, can guarantee the bandwidth of each voice call, fax even without business.
On the other hand; Packet radio numeric field data (for example GPRS, EGPRS etc.) transport service development at present is very fast; Terrestrial links adopt the packetizing transmission can better be suitable for the transmission of wireless packet domain, make networking more flexibly, also effectively carry out the statistic multiplexing of transfer resource, particularly in the wireless transmission communication system of TDM mode; For example in the gsm wireless transport communication system, gradually the transmission of link packet earthward of beginning, the direction of IPization transmission develop.
But after introducing the packetizing transmission, also can bring some negative influences.After for example adopting the packetizing transmission, can bring problems such as propagation delay time, shake, thus the service quality (QOS) of influence transmission.Wherein producing the time delay of transmission and an important reasons of shake is the sudden of transmission data.It almost is produced simultaneously promptly will sending with what will receive data; Transmit leg and recipient have no idea to handle simultaneously so many data; Must carry out buffer memory, queuing to the data of sending or receive, thereby cause last transmission excessive with the data delay that receives.All fix because of the position that is not each buffer memory of each channel and queuing again, therefore caused the each transmission and the time interval that receives data unstable, thus the generation shake.
Particularly in the wireless transmission communication system of TDM mode, for example, in the base station of GSM, the sudden problem of transmission is very serious.For the inside of base station that uses same clock source, or adopt behind the various synchronization scenarios in time all synchronous base stations fully, the sub-district frame number of its setting is identical, also is that they almost are to send or receiving data simultaneously.
With reference to figure 1; Can see that from Fig. 1 suppose that synchronous in time synchronising base station has N carrier wave, each channel of supposing these carrier waves all is Full rate Speech TCH (Traffic Channel-Full rateSpeech; TCHFS) (Traffic Channels such as other TCHHS, PDCH channel are also similar); And these channels all are activated, and all N*8 channel of these carrier waves equals in 3,7,11,16,20,24 at T2 (FN mod26) so, and having produced simultaneously need be to the business datum of Abis interface transmission; And at remaining constantly, but have no the transmission of data.
Under the situation of so former TDM of transmission mode, each Traffic Channel is monopolized transmission link, and it is no problem being independent of each other down between each transmission link.But in transmission of packetized data, all traffic channel transmission are shared, and under the situation of common statistic multiplexing Traffic Channel, are very big to the impact of transmission network.Particularly in the wireless transmission communication system of TDM mode, for example in the gsm wireless transport communication system, adopt the whole bag of tricks by each base station get up the synchronously in time interference that can reduce network, the capacity that improves network, following can use more and more.If but these synchronising base stations adopt the packetizing transmission; Then possibly cause the data on the Abis interface between base station and the base station controller to happen suddenly fully; And possibly receive on the different base stations controller when these synchronising base stations, cause the data on the A interface between different base stations controller and the different mobile switching centre to happen suddenly fully so again.
Summary of the invention
The embodiment of the invention provides a kind of synchronising base station, wireless transmission communication system and data transmission method; During with the transmission of synchronising base station packetizing in wireless transmission communication system data; Each sub-district that reduces synchronising base station at the same time between the data burst problem of service data transmission, reduce the time delay and the shake of packet data transmission.
A kind of synchronising base station comprises:
Configuration memory cell; Store the transmission of configuration information of synchronising base station; Said transmission of configuration information includes the community configured information to ground link packet transmission data, includes sub-district under the synchronising base station in the said community configured information and staggers and transmit the temporal information of data;
Transmission processing unit is used for carrying out transfer of data according to the transmission of configuration information of said configuration memory cell storage, wherein terrestrial links is carried out transmission of packetized data according to the temporal information of transmitting data that staggers of the sub-district under the said synchronising base station.
A kind of wireless transmission communication system includes according to time division multiplexing link packet transmission synchronization of data base station, ground, saidly according to time division multiplexing link packet transmission synchronization of data base station, ground is comprised:
Configuration memory cell; Store the transmission of configuration information of synchronising base station; Said transmission of configuration information includes the community configured information to ground link packet transmission data, includes sub-district under the synchronising base station in the said community configured information and staggers and transmit the temporal information of data;
Transmission processing unit is used for carrying out transfer of data according to the transmission of configuration information of said configuration memory cell storage, wherein carries out transmission of packetized data for terrestrial links according to the temporal information of transmitting data that staggers of the sub-district under the said synchronising base station.
A kind of data transmission method, it comprises:
Obtain the transmission of configuration information of synchronising base station; The transmission of configuration information of said synchronising base station includes the community configured information to ground link packet transmission data, includes sub-district under the synchronising base station in the said community configured information and staggers and transmit the temporal information of data;
Transmission of configuration information according to said synchronising base station carries out transfer of data, wherein terrestrial links is carried out transmission of packetized data according to the temporal information of transmitting data that staggers of the sub-district under the said synchronising base station.
According to embodiments of the invention, be provided with sub-district under the synchronising base station in the community configured information of the configuration memory cell of synchronising base station storage and stagger and transmit the temporal information of data; Synchronising base station is when carrying out transmission of packetized data according to time division multiplexing mode; Because the time of each cell data transmission of synchronising base station is incomplete same; Therefore; Each sub-district of synchronising base station is not to transmit the transmission business datum at the same time entirely, thereby can reduce the time delay and the shake of packet data transmission.
Description of drawings
Fig. 1 is the sketch map of a kind of data burst of prior art;
Fig. 2 is a kind of example structure sketch map of wireless transmission communication system of the present invention;
Fig. 3 is a kind of example structure sketch map of synchronising base station of the present invention;
Fig. 4 is a kind of embodiment sketch map that wireless transmission communication system of the present invention is avoided data burst;
Fig. 5 is the another kind of embodiment sketch map that wireless transmission communication system of the present invention is avoided data burst.
Embodiment
With reference to figure 2, this figure is a kind of example structure sketch map of wireless transmission communication system of the present invention.Like diagram; The wireless transmission communication system of present embodiment is based on the wireless transmission communication system of TDM mode packetizing transmission data; The wireless transmission communication system that for example said wireless transmission communication system can be the GSM standard perhaps also can be the wireless communication system of TD-SCDMA standard etc., and said wireless transmission communication system includes synchronising base station 1, and said synchronising base station 1 is the base station after going up synchronously to the time; For example; Use the base station in same clock source, or adopt behind the various synchronization scenarios in time all synchronous base stations fully, synchronising base station 1 according to time division multiplexing mode to ground link packet transmission data.
For the sub-district frame number of avoiding synchronising base station identical; And cause the situation of data burst in the synchronising base station, and can the temporal information of each sub-district of synchronising base station be adjusted in the present embodiment, for example sub-district frame number or timeslot number are adjusted or frame number and timeslot number are adjusted together; The time of the cell data transmission under the synchronising base station is staggered; Wherein frame number is a tdma frame number, is to use T1 in the reality, T2; T3 representes, that is: T1 (11bit) FN Div (26 * 51) range0to2047
T2(5bit)FN?mod26 range0to25
T3(6bit)FN?mod51 range0to50
And time slot (Timeslot) is used for the serial of gap information of some single passages from a multiplexing part, the burst sequence that physical channel sends in slit specific, that periodically occur.This cycle is 8 in gsm system, promptly is a tdma frame.We can say that also a radio-frequency channel comprises 8 physical channels.The sequence number that physical channel can occur in tdma frame with its slit is distinguished, and this sequence number is called timeslot number (time slot number).The sub-district can be set in the present embodiment under the synchronising base station staggers and transmits the temporal information of data; For example can the sub-district frame number or the timeslot number of each sub-district of synchronising base station be adjusted into incomplete same (being the identical or whole differences of part), thereby reduce the data burst of synchronising base station.
With reference to figure 3, this figure is a kind of example structure sketch map that synchronising base station of the present invention reduces data burst.As shown in Figure 3, the synchronising base station of present embodiment can comprise:
In addition, synchronising base station described in the present embodiment also can comprise:
Base station configuration unit 13; Said base station configuration unit 13 can be provided with the temporal information of transmitting data that staggers of the sub-district under the synchronising base station; During concrete the realization; For example, can cook up frame number deviation, the timeslot number deviation of each sub-district according to carrier wave configuration, the transmission group net topology of each sub-district of synchronising base station; The base station configuration unit 13 that passes through then (the for example control desk of base station) sends to each sub-district with frame number straggling parameter or timeslot number straggling parameter; Each sub-district is after having received this parameter, according to frame number, the timeslot number of parameter adjustment oneself.
Above-mentioned synchronising base station is when carrying out transfer of data; Can at first obtain the transmission of configuration information of this synchronising base station; As above-mentioned; The transmission of configuration information of said synchronising base station includes the community configured information to ground link packet transmission data, and including in the said community configured information staggers to the sub-district under the synchronising base station transmits the temporal information of data;
Transmission of configuration information according to said synchronising base station carries out transfer of data, wherein terrestrial links is carried out transmission of packetized data according to the temporal information of transmitting data that staggered in the sub-district under the synchronising base station.
The synchronising base station of the foregoing description and since configuration memory cell storage community configured information in be provided with sub-district under the synchronising base station and stagger and transmit the temporal information of data; Therefore; Synchronising base station is when carrying out transmission of packetized data according to time division multiplexing mode; Because the time of each cell transmission business datum of synchronising base station is incomplete same; Each sub-district that yet is synchronising base station is not at service data transmission at the same time entirely, thereby can reduce the time delay and the shake of packet data transmission.
Wireless transmission communication system with the GSM standard specifically illustrates below.
In the wireless transmission communication system of GSM standard, mobile phone is that the frequency correction channel FCCH that issues according to the sub-district and synchronous channel SCH are come with cell synchronizing.Mobile phone searching frequency correction channel FCCH wherein can obtain the frequency of current main carrier, accomplish to current area in time synchronously.After mobile phone is caught the FCCH channel information, further can catch the SCH channel information, thereby obtain information such as sub-district frame number or timeslot number, after obtaining sub-district frame number or timeslot number information, mobile phone is just in time with current cell synchronizing.In general the frame number of sub-district information such as (or timeslot numbers) is that the frame number (or timeslot number) with the sub-district of all synchronising base stations is identical in theory.Identical for the sub-district frame number that solves synchronising base station and data that send all mobile phones base station that cause are deciphered simultaneously and the transmission data burst problem that causes in the present embodiment, can be according to the terrestrial links transmission situation of network, the frame number or the timeslot number of each sub-district in the synchronising base station staggered; Each sub-district is sent with the data that receive and just can be staggered like this; Like Fig. 4, the frame number or the timeslot number deviation 2 of the sub-district that belongs to through sub-district and the carrier wave N that carrier wave 0 place is set, wherein carrier wave 0 belongs to 2 different sub-districts respectively with carrier wave N; Frame number is a homology; Under the initial situation, both frame numbers are identical, in order to reduce the sudden of transmission; Can the frame number of two synchronized cells be made as unequal; The T2 ' of sub-district that T2 and the N carrier wave of 0 carrier cell for example are set differs 2, and staggering almost completely time of the generation data of the sub-district that the time that sub-district, carrier wave 0 place is produced send data and carrier wave N belong to is like this on macroscopic view; This transmission is exactly uniformly, thereby has reduced the data burst of transmission greatly.
In addition, with reference to figure 5, the T2 of 0 carrier cell is set in the present embodiment; The T2 ' of 1 carrier cell, the T2 of N-1 carrier cell ", and the T2 of the sub-district of N carrier wave
differs 1; just can make the sub-district of carrier wave sub-district, 0 place and 1 carrier wave; the time of the sub-district of N-1 carrier wave and N carrier cell generation transmission data staggers completely, and is same, on macroscopic view; this transmission is exactly uniformly, thereby reduced the data burst that transmits greatly.
In the above-described embodiments; Said frame number or timeslot number stagger will be according to the transmission situation of the carrier number of each sub-district of synchronising base station, traffic carrying capacity, network; Take all factors into consideration and be the cell setting of each synchronising base station different frame number skew or timeslot number skew; To reduce the transmitting burst property of whole net, guarantee the Network Transmission quality of whole net.
The above only is a preferred implementation 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 improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. a synchronising base station is characterized in that, comprising:
Configuration memory cell; Store the transmission of configuration information of synchronising base station; Comprise community configured information in the said transmission of configuration information, include sub-district under the synchronising base station in the said community configured information and stagger and transmit the temporal information of data ground link packet transmission data;
Transmission processing unit is used for carrying out transfer of data according to the transmission of configuration information of said configuration memory cell storage, wherein terrestrial links is carried out transmission of packetized data according to the temporal information of transmitting data that staggers of the sub-district under the said synchronising base station.
2. synchronising base station according to claim 1 is characterized in that, also comprises the base station configuration unit: be used for the temporal information of transmitting data that staggers of the sub-district under the synchronising base station is provided with.
3. synchronising base station according to claim 1 and 2 is characterized in that said temporal information is represented through frame number or timeslot number.
4. wireless transmission communication system includes according to time division multiplexing link packet transmission synchronization of data base station, ground, it is characterized in that, saidly according to time division multiplexing mode link packet transmission synchronization of data base station, ground is comprised:
Configuration memory cell stores the transmission of configuration information of synchronising base station, and said transmission of configuration information includes community configured information, includes sub-district under the synchronising base station in the said community configured information and staggers and transmit the temporal information of data;
Transmission processing unit is used for carrying out transfer of data according to the transmission of configuration information of said configuration memory cell storage, wherein carries out transmission of packetized data for terrestrial links according to the temporal information of transmitting data that staggers of the sub-district under the said synchronising base station.
5. wireless transmission communication system according to claim 4 is characterized in that, said synchronising base station also comprises:
Base station configuration unit: be used for the temporal information of transmitting data that staggers of the sub-district under the synchronising base station is provided with.
6. according to claim 4 or 5 described wireless transmission communication systems, it is characterized in that said temporal information is represented through frame number or timeslot number.
7. a data transmission method is characterized in that, comprising:
Obtain the transmission of configuration information of synchronising base station; Comprise community configured information in the transmission of configuration information of said synchronising base station, include sub-district under the synchronising base station in the said community configured information and stagger and transmit the temporal information of data ground link packet transmission data;
Transmission of configuration information according to said synchronising base station carries out transfer of data, wherein terrestrial links is carried out transmission of packetized data according to the temporal information of transmitting data that staggers of the sub-district under the said synchronising base station.
8. data transmission method according to claim 7 is characterized in that, before the transmission of configuration information that obtains synchronising base station, also comprises:
Sub-district under the synchronising base station temporal information of transmitting data that staggers is provided with.
9. according to claim 7 or 8 described data transmission methods, it is characterized in that said temporal information is represented through frame number or timeslot number.
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| CN2007100302586A CN101394576B (en) | 2007-09-17 | 2007-09-17 | Synchronous base station, wireless transmission communication system and data transmission method |
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| CN101394576B true CN101394576B (en) | 2012-04-04 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306729A (en) * | 1999-05-21 | 2001-08-01 | 皇家菲利埔电子有限公司 | Cellular communication system with variable channel loading |
| CN1689360A (en) * | 2002-09-19 | 2005-10-26 | 高通股份有限公司 | Modified scheduling technique for a telecommunication system |
| CN1750702A (en) * | 2004-09-13 | 2006-03-22 | 大唐移动通信设备有限公司 | Method for flexibly supporting asymmetric service of multiple carrier time division duplex mobiole communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306729A (en) * | 1999-05-21 | 2001-08-01 | 皇家菲利埔电子有限公司 | Cellular communication system with variable channel loading |
| CN1689360A (en) * | 2002-09-19 | 2005-10-26 | 高通股份有限公司 | Modified scheduling technique for a telecommunication system |
| CN1750702A (en) * | 2004-09-13 | 2006-03-22 | 大唐移动通信设备有限公司 | Method for flexibly supporting asymmetric service of multiple carrier time division duplex mobiole communication system |
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