CN1225929C - Radio interface method of mobile communication system - Google Patents
Radio interface method of mobile communication system Download PDFInfo
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- CN1225929C CN1225929C CN 02146586 CN02146586A CN1225929C CN 1225929 C CN1225929 C CN 1225929C CN 02146586 CN02146586 CN 02146586 CN 02146586 A CN02146586 A CN 02146586A CN 1225929 C CN1225929 C CN 1225929C
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Abstract
The present invention provides a wireless interface method of a mobile communication system. The method comprises the steps that the frame length of fixed wireless frames is determined; the wireless frames are classified in a multi-frame range; physical channels of different attributes are respectively mapped to the wireless frames of different classifications; the number of the wireless frames of different classifications in one multi-frame are set according to application environments. By the present invention, the complexity of a resource allocation algorithm in a data voice system can be simplified, and the cost of the data voice system providing high-speed data can be reduced.
Description
Technical field
The present invention relates to mobile communication system, relate in particular to the wireless interface technology field in the mobile communication system.
Technical background
The mainstream technology of 3-G (Generation Three mobile communication system) (3G): WCDMA technology and CDMA2000 technology all are to adopt regularly long frame structure as basic unit of transfer, implement rate-matched on a frame, and the convolution wound is wrong, and operations such as computing interweave.
The resource of wave point all is based on the radio frames distribution, and promptly each physical channel and radio frames have fixing mapping relations.With WCDMA is example:
The basic spread-spectrum code rate 3.84Mcps of WCDMA, frame length 10ms, every frame comprise 15 time slots, 2560 Chip of every time slot.
Only introduce the dedicated channel of WCDMA below.
(1) up link
Uplink dedicated physical channels is divided into: Dedicated Physical Data Channel (DPDCH) and Dedicated Physical Control Channel (DPCCH).
Dedicated Physical Data Channel: uplink dedicated physical data channel is used for carrying the second layer and more high-rise exclusive data.
Dedicated Physical Control Channel: be used for carrying the control information that ground floor produces, comprise: the pilot signal (Pilot), power control signal (TPC) and the transformat indication bit (TFI) that are used for channel estimating.
The uplink dedicated physical channels frame structure as shown in Figure 1.Every frame 10ms is divided into 15 time slots.The frame of 72 connections is formed a superframe, duration 720ms.
Every time slot bit number is: 10*2k, and k=0 wherein ..., 6, corresponding SF=256/2k.Be 256-4.DPCCH and DPDCH are parallel the transmissions.
(2) down link
Downlink dedicated physical channels is divided into: Dedicated Physical Data Channel (DPDCH) and Dedicated Physical Control Channel (DPCCH).
Downlink dedicated physical channels is the time division multiplexing of DPCCH and DPDCH.(TPC, TFI Pilot) are multiplexed on same the channel by time division multiplexing for the data of the second layer and high level and the control information of ground floor.Its frame structure as shown in Figure 2.
Equally, down link DPCH one frame also is made up of 15 time slots, and frame length is 10ms.72 continuous frames are formed a superframe.
When maximum code speed that total bit rate can carry greater than a physical channel, can adopt the method for many yards transmission, promptly send a plurality of parallel identical physical channels at down link.At this moment, the ground floor control information only need send at article one physical channel, and other physical channel does not send any information in the corresponding time period.
The another kind of method of many yards transmission is spreading gain differences of the physical channel of each transmission.Therefore, this moment, every physical channel all needed to send the control information of ground floor.
From the above mentioned, the physical channel of WCDMA and CDMA2000 and radio frames all exist fixing mapping relations, even in follow-up evolution process, also are like this.
The sharpest edges that 3-G (Generation Three mobile communication system) and second generation mobile communication system are compared are exactly that data service at a high speed can be provided.The evolution of WCDMA and CDMA2000 also is to be important symbol with the data service rate that provides (mainly referring to descending) size.
Because the QOS of speech business and data service requires to differ greatly, so in a system, be difficult to it is carried out combined optimization.In other words, a wireless system provides high-speed data service and speech business simultaneously, and the utilization of Radio Resource is to be difficult to optimize.So CDMA2000 is divided into two stages in the process of evolution:
Phase I: CDMA2000 1xEV-DO (Data Only) adopts the channel transmission data that separates with speech, HDR (the High Data Rate) technology that Qualcomm company proposes has become the technical standard in this stage, the support Mean Speed is 650kbps, and peak rate is the high-speed data service of 2.4Mbps.
HDR be a kind of at Packet data service be optimized, the cdma wireless communication technology of high spectrum utilization, can in the 1.25M bandwidth, provide peak rate to reach the high-speed data transmission service of 2.4Mbps.This speed even be higher than the data rate that WCDMA can provide in the 5M bandwidth.HDR has adopted the technology of TDM, and analytical proof, TDM are more suitable for the transmission of data service.Because the present application limit of DO system, it will carry out the transition to second stage.
Second stage: cdma2000 1xEV-DV (Data and Voice), data channel and voice channel unification, 1XEV-DV can provide 3.1M even higher throughput.
1xEV-DV has increased one Traffic Channel forward packet data channel (Forward Packet Data Channel newly on the basis of CDMA2000, F-PDCH), two kinds of schemes of CDM and TDM in the resource allocation of F-PDCH, have been used simultaneously, add the Radio Resource resource scheduling scheme of unborn other forward channels, make wireless resource allocation more complicated, the system handles burden increases greatly.
WCDMA has proposed high-speed data packets access (HSDPA) technology in evolution process, use PDSCH channel can provide the service rate up to 8M, the same with CDMA2000 1xEV-DV, this system provides high-speed data and speech business simultaneously, inevitably causes the wireless resource allocation algorithm very complicated.
Summary of the invention
Purpose of the present invention is exactly the wave point method that proposes in a kind of mobile communication system, can the reduced data voice system in the complexity of resource allocation algorithm, reduce the cost of the data-voice system that high-speed data is provided.
Wave point method in a kind of mobile communication system may further comprise the steps:
A, definite fixing radio frames frame length;
B, radio frames is classified in the multi-frame scope, wherein said multi-frame is made of a plurality of radio frames;
The physical channel of c, different attribute is mapped to different classes of radio frames respectively;
D, the quantity of different classes of radio frames is provided with according to applied environment in a multi-frame.
Described different classes of radio frames can adopt different allocation of radio resources and scheduling scheme, and wherein, described allocation of radio resources scheme is for by the time divide resource or by a sign indicating number divide resource, described dispatching party is by for to dispatch or to dispatch by sign indicating number by the time.
Described different classes of radio frames can adopt identical or different frame structure.
Can adopt different structure of time slot in the described different frame structure.
Having adopted the present invention, with the complexity of resource allocation algorithm in the reduced data voice system greatly, reduced the cost of the data-voice system that high-speed data is provided, is that the technology to existing wave point design strengthens.
Description of drawings
Fig. 1 is the frame structure schematic diagram of up DPDCH/DPCCH;
Fig. 2 is descending DPCH frame structure schematic diagram;
Fig. 3 is a radio frames classification schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Design the frame length of radio frames at first as required, as in the WCDMA system, the radio frames frame length is decided to be 10ms, and spreading rate is decided to be 3.84Mcps.
Radio frames can be classified in the multi-frame scope according to certain principle, and as by parity frame radio frames being classified, this two classes frame number is identical, as shown in Figure 3.
The physical channel of different attribute can be mapped to different classes of radio frames respectively.Suppose that sub-district public physic channel and physics signaling are physical channel A, the physical channel of transmitting voice service is physical channel B, the physical channel of transmitting data service is physical channel C, and physical channel A and B can be mapped to even frame, and physical channel C can be mapped to odd-numbered frame.
Different classes of radio frames can be used different allocation of radio resources and scheduling scheme.The physical channel of carry voice traffic relatively is fit to adopt the technical scheme of CDM, the technical scheme of the more suitable employing of the physical channel of bearing data service TDM.
In the present embodiment, from the physical channel mapping relations of previous step as can be known, that even frame is carried is physical channel A and B, adopt the technical scheme (with the scheme of IS-95 system) of CDM, that odd-numbered frame is carried is physical channel C, adopts the technical scheme (with the scheme of CDMA2000 1X EV DO system) of TDM.
Different classes of radio frames can adopt identical or different frame structure, and the time slot design also can be adopted different designs in the different frame structures.Adopt 15 time slots as odd-numbered frame, and even frame can adopt the structure of 16 time slots.Structure of time slot also can be done further design as required.In the present embodiment, the odd even radio frames adopts identical frame structure, all is 15 time slots, and is identical with the WCDMA system.
Below what time combine, finished the design of a wave point.Because even frame is only handled the scheduling of common channel resources and speech business resource, adopt the mode of CDM; And odd-numbered frame deal with data business only adopts the mode of TDM.Two comparatively simple resource scheduling algorithm was adopted in timesharing during native system was handled.And the present mobile DV system that high-speed data service is provided, processed voice and these two kinds of business that service attribute is widely different of data simultaneously, so wireless resource allocation scheduling very complicated (as adopting CDM and TDM simultaneously), system handles is born very big.So the design among employing the present invention, the wireless resource allocation scheduling of system will become fairly simple, and the cost of system will reduce greatly.
The function of radio frames classification setting also can be provided among the present invention, and promptly the quantity of different classes of radio frames can be provided with as required in a multi-frame, to adapt to different applied environments.
The number of the radio frames of two kinds of attributes is 1: 1 in the present embodiment.Can be arranged to corresponding ratio according to the application scenario of reality.Based on speech business, 3: 1 can be set to as an area,, 1: 3 can be set to if based on data service.
A special case of the present invention is to have only a classification, promptly radio frames is not classified, and just the mobile system wave point design with present existence is identical for this.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (4)
1, the wave point method in a kind of mobile communication system is characterized in that may further comprise the steps:
A, definite fixing radio frames frame length;
B, radio frames is classified in the multi-frame scope, wherein said multi-frame is made of a plurality of radio frames;
The physical channel of c, different attribute is mapped to different classes of radio frames respectively;
D, the quantity of different classes of radio frames is provided with according to applied environment in a multi-frame.
2, the wave point method in a kind of according to claim 1 mobile communication system, it is characterized in that: described different classes of radio frames can adopt different allocation of radio resources and scheduling scheme, wherein, described allocation of radio resources scheme is for pressing the time divide resource or pressing a sign indicating number divide resource, and described scheduling scheme is for to dispatch or to dispatch by sign indicating number by the time.
3, the wave point method in a kind of as claimed in claim 1 or 2 mobile communication system is characterized in that: described different classes of radio frames can adopt identical or different frame structure.
4, as the wave point method in a kind of mobile communication system as described in the claim 3, it is characterized in that: can adopt different structure of time slot in the described different frame structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02146586 CN1225929C (en) | 2002-10-22 | 2002-10-22 | Radio interface method of mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02146586 CN1225929C (en) | 2002-10-22 | 2002-10-22 | Radio interface method of mobile communication system |
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| CN1492695A CN1492695A (en) | 2004-04-28 |
| CN1225929C true CN1225929C (en) | 2005-11-02 |
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| CN 02146586 Expired - Fee Related CN1225929C (en) | 2002-10-22 | 2002-10-22 | Radio interface method of mobile communication system |
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| CN101291174B (en) * | 2007-04-16 | 2013-03-20 | 中兴通讯股份有限公司 | Method for enhancing transmission efficiency of physical layer in radio communication system |
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Granted publication date: 20051102 Termination date: 20191022 |