CN101488799B

CN101488799B - Method for data transmission synchronization between radio network controllers

Info

Publication number: CN101488799B
Application number: CN 200810065947
Authority: CN
Inventors: 储俊林; 陈艳丽
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-01-17
Filing date: 2008-01-17
Publication date: 2013-01-23
Anticipated expiration: 2028-01-17
Also published as: CN101488799A

Abstract

The invention relates to a mobile commutation system, especially a transmission synchronizing method between RNCs, a main RNC transmits downlink data to a sub RNC, the data carries a time T1 transmitting the data and calculates a time adjusting amount according to the data actual transmitting time after the sub RNV receives the data, the sub RNC feeds back the time adjusting amount to the main RNC, the main RNC synchronizes the data transmission time based on the time adjusting amount; according to the method of the invention, the transmitting opportunity of the main RNC transmitting the data to the sub RNC can be adjusted, thereby avoiding the data loss between the RNCs.

Description

The method of data transmission synchronization between radio network controllers

Technical field

The present invention relates to mobile communication system, the method for transmitting synchronous between espespecially a kind of RNC (Radio Network Controller, radio network controller).

Background technology

Development along with the 3G (Third Generation) Moblie technology, the Mobile data speed that can provide is more and more higher, the application form of mobile service is also more and more diversified, except the business such as satisfy that phone, message and surfing Internet with cell phone are browsed, also emerged a large amount of high bandwidth multimedia services, such as video conference, television broadcasting, video request program, advertisement, online education, interactive game etc.Wherein there is a class business to have common characteristics: to require a plurality of users to receive simultaneously identical business.Such as weather forecast, news, advertisement, information, TV etc.In order to effectively utilize mobile network resource, 3GPP (Third GenerationPartnership Project, the 3rd generation partner project) MBMS (MultimediaBroadcast Multicast Service has been proposed, multimedia broadcasting and multicast service), namely in the mobile network, provide a data source to send the point-to-multipoint service of data to a plurality of users, realize that mobile core network and access network resource are shared, improve the utilance of Internet resources, especially the valuable interface resource of eating dishes without rice or wine.

As shown in Figure 1: in the single frequency network of TDD (time division duplex) mobile communication system, different RNC need under Node B (Node B) at the data of eating dishes without rice or wine to send Complete Synchronization on time and content.Because the TDD system is a synchro system, the SFN of all residential quarters (System Frame Number, System Frame Number) identical, can be by main RNC at Iur (Interface between RNCs, interface between RNC) the port transmission data are given other RNC, and stamp time tag, such as SFN, CFN (ConnectionFrame Number, Connection Frame Number), this label specifies these data in moment that the Node B under RNC is eating dishes without rice or wine to send, then by Iub (Interface between a RNC and a Node B, interface between RNC and Node B) port transmission just can guarantee that to Node B Node B is synchronous in the data of eating dishes without rice or wine to send under each RNC.

Because the transmission between RNC postpones if having time, and the transmission of RNC and Node B postpones if having time, therefore need to know how long should shift to an earlier date when sending data at main RNC, otherwise can cause the MBMS business datum to abandon.

Summary of the invention

Technical problem to be solved by this invention provides a kind of method that prevents from causing owing to the transmission time is asynchronous the data transmission synchronization between radio network controllers that business datum abandons.

For solving the problems of the technologies described above, the present invention is achieved through the following technical solutions: a kind of method of data transmission synchronization between radio network controllers, it is characterized in that: the primary wireless network controller sends downlink data to from radio network controller, described data are carried the time T 1 that sends these data, after receiving described data from radio network controller, according to the actual transmitting time T2 of data adjustment amount computing time, describedly from radio network controller described time adjustment amount is fed back to the primary wireless network controller, the primary wireless network controller is according to described adjustment amount synchronous data transmission time time.

The described primary wireless network controller that comprises synchronously obtains propagation time delay synchronously and primary wireless network controller cycle transmission time maintain synchronization; Described time adjustment amount is that T2 subtracts T1.When described synchronously for the cyclical transmission time maintenance when synchronous described downlink data be the downlink transfer control frame; When described synchronously for obtain propagation time delay when synchronous described downlink data be downlink data frame.And in obtaining the propagation time delay synchronizing process, describedly be provided with time adjustment amount tolerance from radio network controller, described time adjustment amount exceeds described tolerance, describedly abandon described downlink data frame from radio network controller, and send time regulating frame to the primary wireless network controller.

Adopt the inventive method can adjust main RNC and send data to transmission opportunity from RNC, avoided the data between RNC to abandon.

Description of drawings

Fig. 1 is the structure chart that the present invention uses Iur port transmission data;

Fig. 2 is method for synchronous schematic diagram of the present invention;

Fig. 3 is the synchronous schematic diagram of the embodiment of the invention one periodic transfer;

Fig. 4 is that the embodiment of the invention two is obtained propagation time delay and adjusted schematic diagram lock in time.

Embodiment

By reference to the accompanying drawings the present invention is described below in detail below by embodiment:

As shown in Figure 2: the primary wireless network controller sends downlink data to from radio network controller, described data are carried the time T 1 that sends these data, after receiving described data from radio network controller, according to the actual transmitting time T2 of data adjustment amount computing time, describedly from radio network controller described time adjustment amount is fed back to the primary wireless network controller, the primary wireless network controller is according to described adjustment amount synchronous data transmission time time.

Embodiment one is the periodic transfer synchronizing process, as shown in Figure 3:

Step N202: main RNC sends the downlink transfer control frame to from RNC, carries the time T 1 that sends these data, and T1 numerical value (can be SFN for time T 0 at that time, CFN etc.) adding TA (Time Advance, actual lead), is 33 o'clock at T0, TA equals 4, T1 and equals 33 and add 4, is 37;

Step N204: behind RNC reception downlink transfer control frame, according to data are actual should transmitting time T2, computing time, adjustment amount delta was that T2 subtracts T1, sent the uplink synchronization frame to main RNC, carry the time T 1 that main RNC brings, and carry time adjustment amount delta; After receiving the downlink transfer control frame from RNC, confirm described data actual should transmitting time T2 be 39, computing time, adjustment amount delta 39 subtracted 37, equaled 2; Send the uplink synchronization frame to main RNC, carry the time 37 that main RNC brings, and carry time adjustment amount 2;

Step N206: main RNC receives behind the uplink control frame of RNC, and TA is increased delta, and TA increases by 2 and becomes 6.

Embodiment two is for obtaining the propagation time delay synchronizing process, and the tolerance of wherein supporting from RNC is [0,0], as shown in Figure 4:

Step N302: be 33 o'clock at T0, TA equals 4.At this moment main RNC sends Frame to from RNC, carries the time T 1 that sends these data, and wherein T1 equals 33 and adds 4, is 37;

Step N304: behind RNC downlink data receiving frame, the affirmation data are actual should transmitting time T2 to be 38; Computing time, adjustment amount delta 38 subtracted 37, equaled 1; If delta then abandons these data outside tolerance [Low, High], 1 outside tolerance [0,0], abandons this Frame, and transmitting time is adjusted frame to main RNC, carries the time 37 that main RNC brings, and carries time adjustment amount 1;

Step N306: main RNC receives behind the uplink control frame of RNC, TA is increased by 1, TA become 5.

Claims

1. the method for a data transmission synchronization between radio network controllers, it is characterized in that: the primary wireless network controller sends downlink data to from radio network controller, described data are carried the time T 1 that sends these data, after receiving described data from radio network controller, according to data are actual should transmitting time T2 adjustment amount computing time, describedly from radio network controller described time adjustment amount is fed back to the primary wireless network controller, the primary wireless network controller is according to described adjustment amount synchronous data transmission time time.

2. the method for data transmission synchronization between radio network controllers as claimed in claim 1 is characterized in that: the described primary wireless network controller that comprises synchronously obtains propagation time delay synchronously and primary wireless network controller cycle transmission time maintain synchronization.

3. the method for data transmission synchronization between radio network controllers as claimed in claim 2, it is characterized in that: described time adjustment amount is that T2 subtracts T1.

4. the method for data transmission synchronization between radio network controllers as claimed in claim 3, it is characterized in that: downlink data is the downlink transfer control frame described in the described cyclical transmission time maintenance synchronizing process.

5. the method for data transmission synchronization between radio network controllers as claimed in claim 3 is characterized in that: described to obtain downlink data described in the propagation time delay synchronizing process be downlink data frame.

6. the method for data transmission synchronization between radio network controllers as claimed in claim 5, it is characterized in that: describedly be provided with time adjustment amount tolerance from radio network controller, described time adjustment amount exceeds described tolerance, describedly abandon described downlink data frame from radio network controller, and send time regulating frame to the primary wireless network controller.