CN1173585C - Universal grouped radio service data frame signal transmitting method - Google Patents
Universal grouped radio service data frame signal transmitting method Download PDFInfo
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- CN1173585C CN1173585C CNB011266120A CN01126612A CN1173585C CN 1173585 C CN1173585 C CN 1173585C CN B011266120 A CNB011266120 A CN B011266120A CN 01126612 A CN01126612 A CN 01126612A CN 1173585 C CN1173585 C CN 1173585C
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Abstract
The present invention discloses a transmitting method for general packet radio service data frame signals. In the process of transmitting signals, a radio sub time slot of an Um interface is mapped to two path of 16 kbit/s land circuits of an Abis interface when a logical channel of the radio sub time slot of the Um interface is a special packet channel, and a CS-3/CS-4 encoding mode is used. When the method is used, land circuit resources are saved, a radio channel of the Um interface can be conveniently mapped to a land channel under the condition that whether a certain special packet channel uses the CS-3 / CS-4 encoding mode can hardly be determined, and 32K land circuits do not have to be configured; the hardware requirements of the original switching networks can be satisfied, and hardware does not have to be upgraded.
Description
Technical field
The present invention relates to mobile communication system, more specifically be meant transmission method between a kind of base station of general packet radio service and base station controller interface
Background technology
The GSM base station sub-system must be introduced packet control unit (PCU) when supporting general packet radio service.For the position of packet control unit in the general packet radio service system, the ETSI agreement has provided three kinds of suggestions, there are A, B, three kinds of forms of C in its position, as shown in Figure 1, and has adopted B, C dual mode at present mostly, among Fig. 1, CCU is the chnnel coding unit, and BSC is a base station controller, and GSN site is the GSN website, BSC site is the BSC website, and PCU is a packet control unit.
In gsm system, finish the mapping between the land circuit Abis interface between wireless air Um Interface, base station and the base station controller (base station controller) by base station (base transceiver station).After introducing general packet radio service, new demand has been proposed this mapping relations.
Gsm system is at Um Interface, be to adopt packet dedicated control channel (PDCH) to carry general packet wireless business, every road packet dedicated control channel only takies a wireless sub-slots in that the Traffic Channel (TCH) of Um Interface and former GSM is the same, but data throughout is different.Packet dedicated control channel has four kinds of channel coding methods, and the transfer rate of various coded systems and its RLC/MAC data packet byte number that can transmit are as shown in table 1 below.
Table 1
| Channel coding method | RLC/MAC data block size (octets) | Speed kb/s |
| CS-1 | 23 | 9.05 |
| CS-2 | 33 | 13.4 |
| CS-3 | 39 | 15.6 |
| CS-4 | 53 | 21.4 |
Gsm system generally adopts the land circuit (or claiming the 16K sub-slots) of 16kbit/s at Abis interface.
When the logical channel type of a wireless sub-slots of Um Interface is Traffic Channel (TCH), base transceiver station is responsible for it is mapped to the land circuit of one road 16kbit/s of Abis interface, and each radio block is mapped to a voice TRAU (transcoder and Rate Adapter Unit) frame.
When the logical channel type of a wireless sub-slots of Um Interface is packet dedicated control channel and employing CS-1/CS-2 coded system, base transceiver station can adopt the mode of similar Traffic Channel (TCH), it is mapped to the land circuit of one road 16kbit/s of Abis interface, and each radio block is mapped to a 16K data TRAU (transcoder and Rate Adapter Unit) frame.
But, when the logical channel type of a wireless sub-slots of Um Interface is CS-3/CS-4 coded system in packet dedicated control channel and the employing table 1, because transfer rate is respectively 15.6kbit/s and 21.4kbit/s, therefore can not be mapped to same 16kbit/s land circuit.
To this, used solution is at present, when the logical channel type of a wireless sub-slots of Um Interface is packet dedicated control channel and employing CS-3/CS-4 coded system, its land circuit (perhaps claiming the 32K sub-slots) that is mapped to a 32kbit/s is got on, be about to each radio block and be mapped to 32K data TRAU (transcoder and Rate Adapter Unit) frame, pass to base station controller/packet control unit then and handle, be referred to as " 32K data trau frame scheme ".When adopting " 32K data trau frame scheme ", there is following problem:
One, waste ground circuit resource, in the process that general packet wireless business carries out, base station sub-system is dynamically to adjust the channel coding method that packet dedicated control channel adopts according to the wireless quality situation of transfer of data, and there are much relations the position of the wireless quality of transfer of data and mobile phone, so whether certain packet dedicated control channel adopts CS-3, CS-4 coded system to be difficult in advance determine, so just bring difficulty to setting up of the mapping of Um Interface wireless channel to terrestrial channel.If all dispose the 32K land circuit, can bring the significant wastage of land circuit, because under true wireless environment, can adopt the packet dedicated control channel of CS-3, CS-4 coded system at one time is part for each packet dedicated control channel; If only be this part packet dedicated control channel configuration 32K land circuit, so only this part packet dedicated control channel can adopt CS-3, CS-4 coded system, and the utilance of land circuit is lower in general.
Two, former base station controller device hardware can not meet the demands, before introducing general packet radio service, base station controller only need be supported the 16K time gas exchange function between Abis interface land circuit and Ater Interface, and the circuit that need be supported in 32K between the processing hardware of Abis interface land circuit and base station controller/PCU inter-process 32K Frame now connects.Can not meet the demands for original switching network part hardware, may exist needs HardwareUpgring, and perhaps population size descends.
Three, to the restriction of disposing of Abis interface land circuit, underaction.Support the packet dedicated control channel of CS-3, CS-4 coded system, must take the 32K sub-slots at Abis interface, and in order to guarantee that the data trau frame is kept perfectly when base transceiver station passes to base station controller, this 32K sub-slots can not be split into any two 16K sub-slots.The user when the configuration of planning Abis interface land circuit, more complicated.
Summary of the invention
The present invention is directed to the problem that data frame signal exists between above-mentioned base station and base station controller interface in transmission course, propose a kind of universal grouped radio service data frame signal transmitting method.
In order to address the above problem, universal grouped radio service data frame signal transmitting method of the present invention is;
When the logical channel type of a wireless sub-slots of Um Interface is Traffic Channel, base transceiver station is the terrestrial repetition circuit of 16kbit/s with the road transmission rate that the data frame signal that will transmit is mapped to Abis interface, and each radio block is mapped to a voice trau frame;
When the logical channel type of a wireless sub-slots of Um Interface is packet dedicated control channel and employing CS-1/CS-2 coded system, base transceiver station adopts the mode of Traffic Channel, the road transfer rate that the data frame signal that will transmit is mapped to Abis interface is the terrestrial repetition circuit of 16kbit/s, and each radio block is mapped to a 16K data trau frame;
When the logical channel type of a wireless sub-slots of Um Interface is packet dedicated control channel and employing CS-3/CS-4 coded system, the base station is in the terrestrial repetition circuit of 16kbit/s with two tunnel transfer rates that the data message of the wireless sub-slots of Um Interface is mapped to Abis interface
This method further may further comprise the steps:
A is base unit with the Abis interface land circuit with the 16K sub-slots at first, is divided into static and dynamic two circuit bank;
B, again with the 16K sub-slots in the circuit bank of static ground,, be used for the wireless sub-slots of packet dedicated control channel with each of Um Interface by the mode of data configuration, set up static mappings relation one to one, and claim that this moment, the 16K sub-slots of land circuit was main time slot;
C makes the 16K sub-slots of dynamic ground circuit bank constitute a resource pool, is used for dynamically being attached on the corresponding main time slot when the wireless sub-slots of packet dedicated control channel adopts CS-3, CS-4 coded system;
D when estimating that the wireless sub-slots of a certain packet dedicated control channel need adopt CS-3, CS-4 coded system, from the 16K sub-slots resource pool of dynamic land circuit group, distributes one road still untapped sub-slots, and is referred to as from time slot;
E, by the newly-built packet dedicated control channel master of base transceiver station time slot and distribution mapping relations, at this moment, this packet dedicated control channel master time slot while and former main time slot, newly assignedly there are mapping relations between the time slot from time slot, main time slot and from the time slot collaborative work is finished transfer of data together;
F, when the wireless sub-slots of described packet dedicated control channel does not adopt CS-3, CS-4 coded system, the mapping relations of removing the wireless sub-slots of this packet dedicated control channel and setting up by base transceiver station from time slot, after the release from time slot, be reentered into resource pool, use dynamically to distribute to other packet dedicated control channel once more.
When the radio block of each air interface is mapped to 16K data trau frame in the main time slot and 16K data trau frame from time slot, be responsible for a radio block is split into two 16K data trau frames by transmitting base station transceiver station or packet control unit, be responsible for from two 16K data trau frames, recovering radio block by recipient's base transceiver station or packet control unit.
Described main time slot and the 16K data trau frame from time slot, all comprise and be used for synchronous frame head information, base transceiver station and packet control unit are by the synchronous frame header information in the Frame, define the Frame that belongs to same radio block, finish merging work between two road 16K Frames and the radio block by software mode then.
The 16k land circuit that described Abis interface is idle arbitrarily can be used as from time slot, in a site scope, can dynamically be attached on the different main time slots from time slot.
Owing to after the present invention has adopted above-mentioned scheme, have following advantage:
1, saved the land circuit resource, whether adopted under the situation that CS-3, CS-4 coded system be difficult to determine, given and set up the Um Interface wireless channel and bring convenience, and needn't dispose the 32K land circuit to the mapping of terrestrial channel at certain packet dedicated control channel;
2, can satisfy the requirement of original switching network hardware, not need HardwareUpgring;
3, the idle arbitrarily 16k land circuit of Abis interface can be used as from time slot, can make full use of each idle land circuit, and is flexible from time slot and main time slot relative position; And in a site scope, can dynamically be attached on the different main time slots from time slot, can improve the utilance of idle land circuit based on the statistic multiplexing rule.
Description of drawings
Fig. 1 is the position view of the fixed packet control unit of ETSI agreement in the general packet radio service system.
Fig. 2 is in the method applied in the present invention, the dynamically additional sub-slots schematic diagram of general packet radio service.
Embodiment
Method for transmitting signals can be described as follows between the base station of general packet radio service of the present invention and base station controller interface:
When the logical channel type of a wireless sub-slots of Um Interface was Traffic Channel, base transceiver station was mapped to the land circuit of one road 16kbit/s of Abis interface with the data frame signal that will transmit, and each radio block is mapped to a voice trau frame;
When the logical channel type of a wireless sub-slots of Um Interface is packet dedicated control channel and employing CS-1/CS-2 coded system, base transceiver station adopts the mode of Traffic Channel, the data frame signal that will transmit is mapped to the land circuit of one road 16kbit/s of Abis interface, and each radio block is mapped to a 16K data trau frame;
Please in conjunction with shown in Figure 2, be packet dedicated control channel and when adopting the CS-3/CS-4 coded system in the logical channel type of a wireless sub-slots of Um Interface, the wireless sub-slots of Um Interface is mapped to the land circuit of two road 16kbit/s of Abis interface,
This method further may further comprise the steps:
A, Operation and Maintenance personnel are base unit with the Abis interface land circuit with the 16K sub-slots at first, are divided into static and dynamic two circuit bank;
B, again with the 16K sub-slots in the circuit bank of static ground,, be used for the wireless sub-slots of packet dedicated control channel with each of Um Interface by the mode of data configuration, set up static mappings relation one to one, and claim that this moment, the 16K sub-slots of land circuit was main time slot;
C makes the 16K sub-slots of dynamic ground circuit bank constitute a resource pool, is used for dynamically being attached on the corresponding main time slot when the wireless sub-slots of packet dedicated control channel adopts CS-3, CS-4 coded system;
D when estimating that the wireless sub-slots of a certain packet dedicated control channel need adopt CS-3, CS-4 coded system, from the 16K sub-slots resource pool of dynamic land circuit group, distributes one road still untapped sub-slots, and is referred to as from time slot;
E, by wireless sub-slots of the newly-built packet dedicated control channel of base transceiver station and the mapping relations of distribution from time slot, at this moment, this packet dedicated control channel is wireless sub-slots simultaneously and former main time slot, newly assignedly have mapping relations between the time slot, main time slot and from the time slot collaborative work is finished transfer of data together;
F, when the wireless sub-slots of described packet dedicated control channel does not adopt CS-3, CS-4 coded system, the mapping relations of removing the wireless sub-slots of this packet dedicated control channel and setting up by base transceiver station from time slot, after the release from time slot, be reentered into resource pool, use dynamically to distribute to other packet dedicated control channel once more.
When the radio block of each air interface is mapped to 16K data trau frame in the main time slot and 16K data trau frame from time slot, be responsible for a radio block is split into two 16K data trau frames by transmitting base station transceiver station or packet control unit, be responsible for from two 16K data trau frames, recovering radio block by recipient's base transceiver station or packet control unit.
Described main time slot and the 16K data trau frame from time slot, all comprise and be used for synchronous frame head information, base transceiver station and packet control unit are by the synchronous frame header information in the Frame, define the Frame that belongs to same radio block, finish merging work between two road 16K Frames and the radio block by software mode then.
The 16k land circuit that described Abis interface is idle arbitrarily can be used as from time slot, in a site scope, can dynamically be attached on the different main time slots from time slot.
Below further specifying method of the present invention for example again,
The configuration of supposing some base transceiver stations is:
1) three sub-districts are arranged, number consecutively is CELL0, CELL1, CELL2.
2) each cell configuration 4 TRX, by cell number ordering, be followed successively by TRX0, TRX1 to TRX11;
3) MAIN BCCH of each cell configuration and a SDCCH/8.
4) mode of the LAPD link of shared one road 64K of a plurality of TRX of employing;
5) Abis interface has only disposed one road E1 trunk.
Then its Abis interface land circuit can dispose as following table.
Table 2 Abis interface time slot configuration example
| Time slot | Sub-slots 0 | Sub-slots 1 | Sub-slots 2 | Sub-slots 3 | Purposes |
| 0 | 0 | 1 | 2 | 3 | The E1 synchronization slot |
| 1 | TS2 | TS3 | The Circuit Service channel of TRX0 or the main time slot of packet traffic channel | ||
| 2 | TS4 | TS5 | TS6 | TS7 | |
| 3 | TS0 | TS1 | TS2 | TS3 | The Circuit Service channel of TRX1 or the main time slot of packet traffic channel |
| 4 | TS4 | TS5 | TS6 | TS7 |
| Time slot | Sub-slots 0 | Sub-slots 1 | Sub-slots 2 | Sub-slots 3 | Purposes |
| 5 | TS0 | TS1 | TS2 | TS3 | The Circuit Service channel of TRX2 or the main time slot of packet traffic channel |
| 6 | TS4 | TS5 | TS6 | TS7 | |
| 7 | TS0 | TS1 | TS2 | TS3 | The Circuit Service channel of TRX3 or the main time slot of packet traffic channel |
| 8 | TS4 | TS5 | TS6 | TS7 | |
| 9-16 | The Circuit Service channel of TRX4-7 or the main time slot of packet traffic channel, the same TRX0-3 of sub-slots configuration distributional class | ||||
| 17-24 | The Circuit Service channel of TRX8-11 or the main time slot of packet traffic channel, the same TRX0-3 of sub-slots configuration distributional class | ||||
| 25-27 | From time slot, be used for the packet traffic channel of CS-3/CS-4 | ||||
| 28 | 112 | 113 | 114 | 115 | The 64K LAPD signaling link (RSL) of the TRX8 of CELL2, TRX9, TRX10, TRX11 |
| 29 | 116 | 117 | 118 | 119 | The 64K LAPD signaling link (RSL) of the TRX4 of CELL1, TRX5, TRX6, TRX7 |
| 30 | 120 | 121 | 122 | 123 | The 64K LAPD signaling link (RSL) of the TRX0 of CELL0, TRX1, TRX2, TRX3 |
| 31 | 124 | 125 | 126 | 127 | The 64K LAPD maintenance link (OML) of base transceiver station |
Can see that from last table dynamically in the resource pool that sub-slots constitutes, one has 18 16k sub-slots, that is:
Time slot 1: sub-slots 0, sub-slots 1;
Time slot 9: sub-slots 0, sub-slots 1;
Time slot 17: sub-slots 0, sub-slots 1;
Time slot 25: sub-slots 0, sub-slots 1, sub-slots 2, sub-slots 3;
Time slot 26: sub-slots 0, sub-slots 1, sub-slots 2, sub-slots 3;
Time slot 27: sub-slots 0, sub-slots 1, sub-slots 2, sub-slots 3;
We are under this base transceiver station, and taking place for the first time to adopt the situation of CS-3, CS-4 coded system is example, the description operation process:
Suppose the TS7 of TRX0, be configured to packet dedicated control channel, have general packet wireless business to carry out above,, can adopt CS-3, CS-4 coded system according to the estimation of current wireless transmission quality.
From the 16K sub-slots resource pool of dynamic land circuit group, distribute one road still untapped sub-slots.We adopt and search from timeslot number, sub-slots number ascending mode, and the result is the sub-slots 0 of time slot 1.
Mapping relations by the sub-slots 0 of the TS7 of the newly-built wireless air interface TRX0 of base transceiver station and ABIS land circuit time slot 1.By base transceiver station, responsible each radio block that the TS7 of wireless air interface TRX0 is received is split into two 16K data TRAU (transcoder and Rate Adapter Unit) frame, sub-slots 0 by ABIS land circuit time slot 1, and former main time slot--the sub-slots 3 of time slot 2, send to packet control unit respectively, packet control unit is responsible for recovering radio block from two 16K data TRAU (transcoder and Rate Adapter Unit) frame; In the other direction roughly the same.
At the TS7 of TRX0, when not needing to adopt CS-3, CS-4 coded system, remove the mapping relations of the sub-slots 0 of wireless sub-slots of this packet dedicated control channel and ABIS land circuit time slot 1 by base transceiver station.The sub-slots 0 of the ABIS land circuit time slot 1 after the release from time slot, be reentered into resource pool, can dynamically distribute to other packet dedicated control channel when needed once more and use.
Claims (5)
1, a kind of universal grouped radio service data frame signal transmitting method,
When the logical channel type of a wireless sub-slots of Um Interface is Traffic Channel, base transceiver station is the terrestrial repetition circuit of 16kbit/s with the road transmission rate that the data frame signal that will transmit is mapped to Abis interface, and each radio block is mapped to a voice trau frame;
When the logical channel type of a wireless sub-slots of Um Interface is packet dedicated control channel and employing CS-1/CS-2 coded system, base transceiver station adopts the mode of Traffic Channel, the road transfer rate that the data frame signal that will transmit is mapped to Abis interface is the terrestrial repetition circuit of 16kbit/s, and each radio block is mapped to a 16K data trau frame;
It is characterized in that:
In the logical channel type of a wireless sub-slots of Um Interface is packet dedicated control channel and when adopting the CS-3/CS-4 coded system, and the base station is in the terrestrial repetition circuit of 16kbit/s with two tunnel transfer rates that the data message of the wireless sub-slots of Um Interface is mapped to Abis interface.
2, data frame signal transmission method as claimed in claim 1 is characterized in that,
This method further may further comprise the steps:
A is base unit with the Abis interface land circuit with the 16K sub-slots at first, is divided into static and dynamic two circuit bank;
B, again with the 16K sub-slots in the circuit bank of static ground,, be used for the wireless sub-slots of packet dedicated control channel with each of Um Interface by the mode of data configuration, set up static mappings relation one to one, and claim that this moment, the 16K sub-slots of land circuit was main time slot;
C makes the 16K sub-slots of dynamic ground circuit bank constitute a resource pool, is used for dynamically being attached on the corresponding main time slot when the wireless sub-slots of packet dedicated control channel adopts CS-3, CS-4 coded system;
D when estimating that the wireless sub-slots of a certain packet dedicated control channel need adopt CS-3, CS-4 coded system, from the 16K sub-slots resource pool of dynamic land circuit group, distributes one road still untapped sub-slots, and is referred to as from time slot;
E, by the newly-built packet dedicated control channel master of base transceiver station time slot and distribution mapping relations, at this moment, this packet dedicated control channel master time slot while and former main time slot, newly assignedly there are mapping relations between the time slot from time slot, main time slot and from the time slot collaborative work is finished transfer of data together;
F, when the wireless sub-slots of described packet dedicated control channel does not adopt CS-3, CS-4 coded system, the mapping relations of removing the wireless sub-slots of this packet dedicated control channel and setting up by base transceiver station from time slot, after the release from time slot, be reentered into resource pool, use dynamically to distribute to other packet dedicated control channel once more.
3, data frame signal transmission method as claimed in claim 2, it is characterized in that: when the radio block of each air interface is mapped to 16K data trau frame in the main time slot and 16K data trau frame from time slot, be responsible for a radio block is split into two 16K data trau frames by transmitting base station transceiver station or packet control unit, be responsible for from two 16K data trau frames, recovering radio block by recipient's base transceiver station or packet control unit.
4, data frame signal transmission method as claimed in claim 3, it is characterized in that: described main time slot and the 16K data trau frame from time slot, all comprise and be used for synchronous frame head information, base transceiver station and packet control unit are by the synchronous frame header information in the Frame, define the Frame that belongs to same radio block, finish merging work between two road 16K Frames and the radio block by software mode then.
5, data frame signal transmission method as claimed in claim 2 is characterized in that:
The 16k land circuit that described Abis interface is idle arbitrarily can be used as from time slot, in a site scope, can dynamically be attached on the different main time slots from time slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011266120A CN1173585C (en) | 2001-09-03 | 2001-09-03 | Universal grouped radio service data frame signal transmitting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011266120A CN1173585C (en) | 2001-09-03 | 2001-09-03 | Universal grouped radio service data frame signal transmitting method |
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| CN1404317A CN1404317A (en) | 2003-03-19 |
| CN1173585C true CN1173585C (en) | 2004-10-27 |
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| CN100414924C (en) * | 2003-11-20 | 2008-08-27 | 华为技术有限公司 | Method of distributing ABIS interface band width resource |
| CN100455038C (en) * | 2004-03-03 | 2009-01-21 | 华为技术有限公司 | Method of data transmission in enhanced GPRS system |
| US8578046B2 (en) * | 2005-10-20 | 2013-11-05 | Qualcomm Incorporated | System and method for adaptive media bundling for voice over internet protocol applications |
| CN101820650B (en) * | 2009-02-27 | 2012-11-28 | 中兴通讯股份有限公司 | Method and system for dynamically utilizing Abis time slot resources |
| CN109003618A (en) * | 2018-08-14 | 2018-12-14 | Oppo广东移动通信有限公司 | Coding control method, device, electronic equipment and storage medium |
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Granted publication date: 20041027 |