CN1214548C - Data transmission method in wireless access network - Google Patents
Data transmission method in wireless access network Download PDFInfo
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- CN1214548C CN1214548C CN 02121011 CN02121011A CN1214548C CN 1214548 C CN1214548 C CN 1214548C CN 02121011 CN02121011 CN 02121011 CN 02121011 A CN02121011 A CN 02121011A CN 1214548 C CN1214548 C CN 1214548C
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- data
- wireless access
- access network
- base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present relates to a data transmission method in wireless access networks. In the method, a data transmission process is carried out, namely that user data is conveyed to a user terminal from a core network and is conveyed to the core network from the user terminal, by a wireless access network gateway of data transmission service between a charge user terminal and the core network. The present invention also comprises a data transmission method using a plurality of base stations to convey data service, and therefore, the data transmission method proposed by the present invention for separating data service functions and control functions is favorable to accelerating the transmission speed of data in wireless access networks and enhancing the transmission performance of ever growing high speed data service and is suitable for the needs of technical development of wireless communication; in addition, the data transmission method provided by the present invention for using a plurality of base stations to convey single data service provides possibility for further greatly enhancing the data transmission speed of wireless access networks.
Description
Technical field
The present invention relates to a kind of wireless network communication technique, relate in particular to the data transmission method in a kind of wireless access network.
Background technology
Realize that user terminal and transfer of data between core network are to realize the necessary condition of communicating by letter between different user terminals in the wireless access network.At present, the business of the transfer of data in the wireless access network all concentrates among the RNC (radio network controller), this RNC that has concentrated all wireless traffics and controlled function reduces greatly to the transmission and processing speed of data business, has influenced the communication quality of wireless access network.Therefore, along with radio network technique and professional development, control becomes development trend with separating of business function in the wireless access network.
Separate in the wireless access network with business function in control, with the closely-related signaling of wave point physical layer major part is ended at the base station, the function relevant with business also will progressively move in the base station.In view of the situation, if still adopt the data transmission method that has now in the wireless access network, then can't adapt to the wireless access network of this control and service detach.
And, transfer of data between existing wireless access network and user terminal all is to provide resource by a base station, message transmission rate is subject to this Radio Transmission Technology, be difficult to raising by a relatively large margin, this situation can't satisfy the requirement that data transmission service improves constantly wireless network transmissions speed.In addition, intersection coverage property that wireless technology has and parallel Transceiver Features make subscriber equipment have simultaneously ability with a plurality of base station communications, utilize this ability can be under single base station transmittability condition of limited the higher transmission performance of cooperation realization by many base stations.But present wireless network standards does not provide this method that is transmitted the individual data business by a plurality of base stations.
Summary of the invention
Order of the present invention is provides data transmission method in a kind of wireless access network, makes that increasing substantially of message transmission rate becomes possibility in the wireless access network.
The object of the present invention is achieved like this; Data transmission method in the wireless access network comprises:
In the descending stage, user data sends user terminal to from core net:
(1) the wireless access network gateway is from the core net receiving subscriber data, and converts thereof into corresponding frame format;
(2) the wireless access network gateway sends user data frame to base station by radio bearer;
(3) base station converts the Frame coded modulation transmission block of wave point to, sends to user terminal by physical channel;
In the up stage, user data is sent to core net from user terminal:
(4) base station receives transmission block from user terminal, converts its demodulating and decoding to corresponding Frame;
(5) base station sends Frame to the wireless access network gateway by radio bearer;
(6) wireless access network gateway Frame that the base station is transmitted carries out sending to core net after the format conversion.
Described step (2) comprising:
(21) the wireless access network gateway is multiplexing in IP datagram with each user's data frame;
(22) IP datagram is sent to serving BS and drift base station respectively.
Described serving BS is one; The number of described drift base station is to determine according to user's data flow, data transmission quality and message transmission rate.
Described step (22) comprising:
(31) if there is direct transmission link between wireless access network gateway and drift base station, then the wireless access network gateway is directly to drift base station transmission data;
(32) if there is not direct transmission link between wireless access network gateway and drift base station, then the wireless access network gateway transmits data by serving BS to drift base station.
Described step (3) comprising:
(41) demultiplexing is carried out to the IP datagram that receives in the base station, obtains each user's data frame;
(42) between serving BS and drift base station exchanging user data and with transfer of data relevant control signaling;
(43) coded modulation generation wireless transmission block is carried out to Frame in the base station;
(44) base station sends wireless transmission block to user terminal by wireless channel;
(45) user terminal carries out the demodulation sign indicating number to wireless transmission block, obtains user data frame;
(46) user terminal makes up the same business data frame from each base station, obtains complete Frame.
Described step (45) is: user terminal receives the decode it respectively according to the mutually different scrambler of the transmission block carrying that serving BS and drift base station are sent.
Transfer of data between described core net and wireless access network gateway, between wireless access network gateway and base station, between base station and the base station adopts the transport protocol stack based on the IP agreement.
IP datagram structure in the described step (21) after multiplexing comprises:
The connection identifier field: connection identifier is used to identify the source of data of being re-used;
The data sequence number field; Data sequence number is used for identifying the position of data in corresponding source that be re-used.
Described IP datagram structure after multiplexing also comprises:
Multiplexing field: multiplexing head is used for the multiplexing state of identification data.
When transport layer protocol adopted User Datagram Protoco (UDP) UDP, described connection identifier was a udp port number.
When transport layer protocol adopted realtime transmission protocol RTP, described connection identifier was the Synchronization Source of real time business.
By technique scheme as can be seen, the present invention directly transmits user data by wireless access network gateway and the base station set up between user terminal and core net in wireless access network.This data transmission method that separates with controlled function based on data service function in the wireless access network, help accelerating the transmission speed of data in wireless access network, improve the transmission performance of growing high-speed data service, adapt to the needs of wireless communication technology development.The present invention also provides the data transmission method that is transmitted the individual data business by a plurality of base stations, and further data transmission bauds provides possibility in the wireless access network in order to increase substantially.
Description of drawings
The wireless accessing network structure schematic diagram that Fig. 1 uses for the present invention;
Fig. 2 is the transfer of data schematic diagram A of wireless access network gateway among the present invention and a plurality of base stations;
Fig. 3 is the transfer of data schematic diagram B of wireless access network gateway among the present invention and a plurality of base stations;
Fig. 4 is concrete implementing procedure figure of the present invention;
Fig. 5 is the IP datagram structural representation that has multiplexing identification.
Embodiment
Data transmission method in the wireless access network of the present invention is particularly useful for the wireless access network that control shown in Figure 1 separates with business function, this network is divided into control and professional two kinds of entities with existing RNC, a kind of entity is the wireless access network gateway: be responsible for the transfer of data between core net service node and the base station, another kind of entity is the wireless access server: be responsible for functions such as RRM and mobile management.
Based on above-mentioned wireless access network gateway, data transmission method in the wireless access network of the present invention comprises: user data sends the descending stage of user terminal to and user data is sent to up stage of core net from user terminal from core net, now in conjunction with Fig. 4 the data transmission procedure in descending stage is described, detailed process is as follows:
Step 1: the wireless access network gateway passes through the Iu-u interface from the core net receiving subscriber data, and converts thereof into the frame format of Iug interface;
The Iug interface comprises the interface Iug1 between wireless access network gateway and the serving BS, and the interface Iug2 between wireless access network gateway and the drift base station, as shown in Figure 2;
Frame format on the Iug1 interface mainly is to determine through consultation during by transmission link on setting up the Iug1 interface of wireless access network gateway and serving BS; Frame format on Iug2 interface frame format common and on the Iug1 interface is identical, so that drift base station is convenient to realize by the frame synchronization of IuNB interface with serving BS the transmitting synchronous of user data in the process of transmission data;
Then, the wireless access network gateway need be sent to the base station with user data frame by Iug interface (comprising Iug1 and Iug2), and the base station comprises serving BS and drift base station, and detailed process comprises:
Step 2: in the wireless access network gateway, user data frame is packaged in the IP datagram;
The Frame of different user can be encapsulated in the same IP datagram by multiplexing mode, datagram structure after the encapsulation as shown in Figure 5, so that improve the efficiency of transmission of Iug interface, multiplex data in IP datagram can identify by connection identifier (CID and data sequence number, and wherein connection identifier (CID is mainly used to discern which connection of data from which user that be re-used; It is which data groupings of some users that data sequence number is used for identifying the data that are re-used, and can also be used for identifying user data multiplexing state with a multiplexing head in the IP datagram, so that the speed when improving demultiplexing;
Connection identifier (CID generally is different for different transmission control layer agreements, for example: adopt udp port number as connection identifier (CID based on the connection of udp protocol; Then adopt the Synchronization Source of real-time stream as connection identifier (CID based on the connection of Real-time Transport Protocol;
Step 3: by the transport network layer on the Iug interface IP datagram of the multiplexing encapsulation of above-mentioned process is sent to the base station end from the wireless access network gateway, the base station comprises serving BS and drift base station;
For some data services, must need a serving BS data link with user terminal is provided, to carry out transfer of data by this link; Simultaneously, for same data service, also have one or more drift base station data link with user terminal is provided, and the user data that utilizes these data link can't bear to user terminal transmission serving BS, perhaps can improve the information of serving BS data transmission quality or transmission speed to the user terminal transmission, the number of the drift base station that is adopted is determined according to user's data flow, data transmission quality and message transmission rate;
When having direct link to be connected between wireless access network gateway and the drift base station, between wireless access network gateway and the drift base station by Iug2 interface transmitting user data, as shown in Figure 2;
When not having direct link to be connected between wireless access network gateway and the drift base station, the wireless access network gateway by serving BS to the drift base station transmitting user data, be by IuNB interface transmitting user data, as shown in Figure 3 between serving BS and the drift base station;
Step 4: with the IP datagram decapsulation, the restoring user data frame promptly obtains the Frame of different user in the base station;
The Frame quilt and the demultiplexing process that above-mentioned multiplex process is finished contrary of different user are taken out from IP datagram, put in the formation of waiting for the air interface transmission;
Step 5: serving BS exchanges the signaling relevant with transfer of data with one or more drift base station by the IuNB interface; When not having direct link to be connected between wireless access network gateway and the drift base station, between serving BS and the drift base station also by IuNB interface transmitting user data;
Be the user data transmission course of wave point aloft afterwards, comprise:
Step 6: the Frame coded modulation that will be waited in above-mentioned wave point transmit queue by base station (comprising serving BS and drift base station) generates wireless transmission block;
Step 7: the base station is sent to UE (user) end with above-mentioned wireless transmission block by the wireless channel on the wave point (comprising Fig. 2, wave point 1 and wave point 2 shown in Figure 3);
Serving BS and drift base station walk abreast to being transmitted in generally speaking of UE by air interface 1 and air interface 2, UE distinguishes transmission block from different districts by the scrambler that different districts adopted in serving BS and the drift base station, and use with the sub-district one to one receiver these transmission blocks are received the decode respectively;
Step 8:UE end is comforted the line transmission block and is carried out the demodulation sign indicating number receiving, and takes out user data frame wherein;
Application protocol layer among the step 9:UE will be respectively from the Frame of serving BS and drift base station be combined into the Iu-u interface on the identical user data frame of Frame, promptly be combined into the initial data frame that the wireless access network gateway receives from core net.
So far, finished downlink data transmission process in control and the wireless access network that business function separates.
Because the data transmission procedure in up stage and descending stage is similar, so the data transmission procedure in up stage is no longer elaborated, key data transmission course wherein only is described, process is as follows:
The first step: the base station receives transmission block by wave point from user terminal, its demodulating and decoding is converted to the Frame of Iug interface;
Second step; The base station sends the radio bearer of Frame by the Iug interface to wireless access gateway;
The 3rd step: the Frame that wireless access gateway transmits the base station is converted into the data frame format of Iu interface, sends to media gateway node suitable in the core net;
When having the situation of grand diversity between a plurality of base stations, wireless access gateway with the synthetic correct Frame of the Frame of a plurality of base station transmits, carries out the frame format conversion earlier then.
Claims (11)
1, the data transmission method in a kind of wireless access network comprises:
In the descending stage, user data sends user terminal to from core net:
(1) the wireless access network gateway is from the core net receiving subscriber data, and converts thereof into corresponding frame format;
(2) the wireless access network gateway sends user data frame to base station by radio bearer;
(3) base station converts the Frame coded modulation transmission block of wave point to, sends to user terminal by physical channel;
In the up stage, user data is sent to core net from user terminal:
(4) base station receives transmission block from user terminal, converts its demodulating and decoding to corresponding Frame;
(5) base station sends Frame to the wireless access network gateway by radio bearer;
(6) wireless access network gateway Frame that the base station is transmitted carries out sending to core net after the format conversion.
2, the data transmission method in the wireless access network according to claim 1 is characterized in that described step (2) comprising:
(21) the wireless access network gateway is multiplexing in IP datagram with each user's data frame;
(22) IP datagram is sent to serving BS and drift base station respectively.
3, according to the data transmission method in the wireless access network according to claim 2, it is characterized in that: described serving BS is one; The number of described drift base station is to determine according to user's data flow, data transmission quality and message transmission rate.
4,, it is characterized in that described step (22) comprising according to the data transmission method in claim 2 or the 3 described wireless access networks:
(41) if there is direct transmission link between wireless access network gateway and drift base station, then the wireless access network gateway is directly to drift base station transmission data;
(42) if there is not direct transmission link between wireless access network gateway and drift base station, then the wireless access network gateway transmits data by serving BS to drift base station.
5, the data transmission method in the wireless access network according to claim 4 is characterized in that described step (3) comprising:
(51) demultiplexing is carried out to the IP datagram that receives in the base station, obtains each user's data frame;
(52) between serving BS and drift base station exchanging user data and with transfer of data relevant control signaling;
(53) coded modulation generation wireless transmission block is carried out to Frame in the base station;
(54) base station sends wireless transmission block to user terminal by wireless channel;
(55) user terminal carries out the demodulation sign indicating number to wireless transmission block, obtains user data frame;
(56) user terminal makes up the same business data frame from each base station, obtains complete Frame.
6, the data transmission method in the wireless access network according to claim 5 is characterized in that described step (55) is: user terminal receives the decode it respectively according to the mutually different scrambler of the transmission block carrying that serving BS and drift base station are sent.
7, the data transmission method in the wireless access network according to claim 4 is characterized in that: the transfer of data between described core net and wireless access network gateway, between wireless access network gateway and base station, between base station and the base station adopts the transport protocol stack based on the IP agreement.
8, the data transmission method in the wireless access network according to claim 2 is characterized in that the IP datagram structure after multiplexing comprises in the described step (21):
The connection identifier field: connection identifier is used to identify the source of data of being re-used;
The data sequence number field; Data sequence number is used for identifying the position of data in corresponding source that be re-used.
9, the data transmission method in the wireless access network according to claim 8 is characterized in that described IP datagram structure after multiplexing also comprises:
Multiplexing field: multiplexing head is used for the multiplexing state of identification data.
10, the data transmission method in the wireless access network according to claim 8 is characterized in that: when transport layer protocol adopted User Datagram Protoco (UDP) UDP, described connection identifier was a udp port number.
11, the data transmission method in the wireless access network according to claim 8 is characterized in that: when transport layer protocol adopted realtime transmission protocol RTP, described connection identifier was the Synchronization Source of real time business.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02121011 CN1214548C (en) | 2002-05-29 | 2002-05-29 | Data transmission method in wireless access network |
| PCT/CN2003/000082 WO2003101005A1 (en) | 2002-05-29 | 2003-01-27 | Data transmission method in the wireless access network |
| AU2003211829A AU2003211829A1 (en) | 2002-05-29 | 2003-01-27 | Data transmission method in the wireless access network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02121011 CN1214548C (en) | 2002-05-29 | 2002-05-29 | Data transmission method in wireless access network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1463085A CN1463085A (en) | 2003-12-24 |
| CN1214548C true CN1214548C (en) | 2005-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02121011 Expired - Fee Related CN1214548C (en) | 2002-05-29 | 2002-05-29 | Data transmission method in wireless access network |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1214548C (en) |
| AU (1) | AU2003211829A1 (en) |
| WO (1) | WO2003101005A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385976C (en) * | 2004-09-30 | 2008-04-30 | 北京信威通信技术股份有限公司 | Method for improving communication terminal intercommunicating voice quality and communication system |
| CN101103642B (en) * | 2004-11-25 | 2010-12-01 | 日本电气株式会社 | Transmission method for uplink transport layer |
| CN100591159C (en) * | 2005-08-24 | 2010-02-17 | 华为技术有限公司 | Method and device for treatment of wireless switch-in network triggering beep-page |
| CN101090358B (en) * | 2006-06-15 | 2011-02-02 | 华为技术有限公司 | Method for recovering user data transmission |
| CN101123549B (en) * | 2006-08-11 | 2010-05-12 | 华为技术有限公司 | Access network system with separated control and carrier and its communication implementation method |
| US8223689B2 (en) * | 2007-02-15 | 2012-07-17 | Lg Electronics Inc. | Hierarchical service list |
| CN101222690B (en) * | 2008-02-01 | 2012-12-12 | 华为技术有限公司 | Code switching method, system and device |
| CN102231653B (en) * | 2009-12-31 | 2014-04-02 | 华为技术有限公司 | Microwave access method and multi-service transmission equipment |
| WO2013035955A1 (en) * | 2011-09-09 | 2013-03-14 | 엘지전자 주식회사 | Method for receiving multicast service and terminal employing same |
| CN104469844B (en) * | 2013-09-16 | 2019-09-20 | 南京中兴新软件有限责任公司 | A kind of realize controls the method and access net system isolated with carrying |
| CN114253900A (en) * | 2020-09-21 | 2022-03-29 | 深圳市中兴微电子技术有限公司 | Data transmission and processing method, distributed unit, radio frequency unit and medium |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6791952B2 (en) * | 1997-10-31 | 2004-09-14 | Nortel Networks Limited | Asymmetric data access scheme |
| US6243365B1 (en) * | 1998-08-04 | 2001-06-05 | Opuswave Networks, Inc. | Continuation control for wireless packet data |
| GB2355623B (en) * | 1999-10-19 | 2003-07-16 | Ericsson Telefon Ab L M | Packet transmission in a UMTS network |
-
2002
- 2002-05-29 CN CN 02121011 patent/CN1214548C/en not_active Expired - Fee Related
-
2003
- 2003-01-27 WO PCT/CN2003/000082 patent/WO2003101005A1/en not_active Application Discontinuation
- 2003-01-27 AU AU2003211829A patent/AU2003211829A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003101005A1 (en) | 2003-12-04 |
| AU2003211829A1 (en) | 2003-12-12 |
| CN1463085A (en) | 2003-12-24 |
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