CN101742556A - Method for acquiring connection frame number in high-speed downlink shared channel by radio network controller - Google Patents
Method for acquiring connection frame number in high-speed downlink shared channel by radio network controller Download PDFInfo
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- CN101742556A CN101742556A CN200810227363A CN200810227363A CN101742556A CN 101742556 A CN101742556 A CN 101742556A CN 200810227363 A CN200810227363 A CN 200810227363A CN 200810227363 A CN200810227363 A CN 200810227363A CN 101742556 A CN101742556 A CN 101742556A
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Abstract
The invention discloses a method for acquiring a connection frame number in a high-speed downlink shared channel by a radio network controller. The radio network controller RNC establishes an high-speed downlink shared channel HS-DSCH according to a data service initiated by a terminal user. The method comprises that: the RNC transmits a downlink transmission synchronous control frame in the HS-DSCH channel; after receiving the downlink transmission synchronous control frame, a node B transmits a downlink transmission synchronous response frame to the RNC according to the type of the data frame in the HS-DSCH channel; and after receiving the downlink transmission synchronous response frame, the RNC calculates the connection frame number currently maintained by the RNC according to the downlink transmission synchronous response frame. The method can acquire accurate connection frame number and avoids the problems such as different operative time of the configuration of the RNC, the node B and a terminal, data loss and process failure, which are caused by a connection frame number acquisition failure or inaccurate acquired connection frame number under a condition of the change of follow-up wireless configuration.
Description
Technical field
The present invention relates to that frame number obtains technology in the 3-G (Generation Three mobile communication system), be particularly related to radio network controller (RNC, Radio Network Controller) at high speed descending sharing channel (HS-DSCH, High-Speed Downlink Shared Channel) obtains the method for Connection Frame Number (CFN, Connection FrameNumber).
Background technology
Fig. 1 is universal mobile telecommunications system (UMTS in the prior art, Universal MobileTelecommunications System) basic structure schematic diagram, as shown in Figure 1, universal land radio access web (UTRAN among the UMTS, Universal Terrestrial Radio Access Network) by Radio Network System (RNS, Radio Network System) form, this RNS links to each other by Iu interface and core net (CN, Core Network); A RNS comprises a RNC and one or more Node B (Node B), and each Node B links to each other with RNC by Iub interface; RNC between the RNS links to each other by the Iur interface.
As an end user device (UE, when User Equipment) business is set up in request in the sub-district, UMTS can be in conjunction with the ability of sub-district, UE place and the using priciple of channel type, for this UE distributes a kind of suitable channel type, comprise: paging channel (PCH, Paging Channel), forward access channel (FACH, Forward Access Channel), dedicated channel (DCH, Dedicated Channel) and HS-DSCH channel etc.Wherein, on the HS-DSCH channel, regulation among the 3GPP TS25.435 V7.9.0 (2008-09): when being Class1, the RNC support node is synchronous when HS-DSCH data frame type (HS-DSCH DATA FRAME TYPE), but does not support transmitting synchronous; When the HS-DSCH data frame type was type 2, neither support node was synchronous, did not also support transmitting synchronous; When the HS-DSCH data frame type was type 3, both support node was synchronous, also supported transmitting synchronous.
RNC can finish timing relationship with Node B synchronously by node, and can calculate roughly CFN according to vertical shift, the process of specifically obtaining CFN is: RNC sends descendant node (DL Node Synchronization) frame synchronously to Node B earlier, Node B sends upstream node (ULNode Synchronization) frame synchronously to RNC then, after RNC receives the upstream node synchronization frame, node frame number (BFN according to vertical shift and upstream node synchronization frame, Node B Frame Number) calculates CFN roughly, CFN then is RNC by sending downlink transmission synchronous control frame accurately, the information acquisition of the downlink transmission synchronous response of returning according to Node B.
After if UE begins initiation business or direct-cut operation, its Signaling Radio Bearer (SRB, SignalingRadio Bearer) and professional radio bearer all be carried on the HS-DSCH channel, if the HS-DSCH data frame type is HS-DSCH DATA FRAME TYPE 2, stipulate according to agreement, this moment, neither support node was synchronous, did not also support transmitting synchronous, so RNC obtains less than CFN; If the HS-DSCH data frame type is HS-DSCH DATA FRAME TYPE 1, stipulate according to agreement, this moment, a support node was synchronous, do not support transmitting synchronous, so though RNC can obtain CFN synchronously according to node, but the CFN that obtains is inaccurate, and can not adjust in real time according to the response of Node B, and the CFN that RNC is safeguarded does not meet actual value.
In RNC, CFN mainly contains following two kinds of functions:
1) RNC fills in when channels such as descending PCH, FACH and DCH send Frame and carries CFN, notice Node B sends to terminal UE at corresponding C FN, and UE is at up Random Access Channel (RACH, Random Access Channel), obtain the CFN of corresponding data in the channel such as DCH, so that carry out media access control layer (MAC, the deciphering of transparent mode radio bearer Medium Access Control) (TMRB, Transparent Mode Radio Bearer) waits other processing;
When 2) RNC initiates the radio configuration change, need notice Node B, UE carry out coming into force of radio configuration simultaneously at identical CFN.
If RNC obtains less than CFN, the CFN that perhaps gets access to is inaccurate, to cause above-mentioned second kind of function can't realize or can't accurately realize, that is: when follow-up radio configuration changes, the time that RNC, NodeB and UE radio configuration come into force may be different, thereby cause losing and the failure of flow process of data, have a strong impact on the performance of system, reduce offering quality of services for users.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of radio network controller to obtain the method for Connection Frame Number at high speed descending sharing channel, can make RNC obtain CFN accurately, improves the synchronism of system wireless config update.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of radio network controller obtains the method for Connection Frame Number at high speed descending sharing channel, the data service that radio network controller (RNC) is initiated according to end user device UE, set up the high speed downlink shared channel HS-DSCH channel, this method comprises: RNC sends downlink transmission synchronous control frame on the HS-DSCH channel; After node Node B receives described downlink transmission synchronous control frame, send downlink transmission synchronous response to RNC according to HS-DSCH channel data frame type; RNC calculates the Connection Frame Number CFN of the current maintenance of RNC according to described downlink transmission synchronous response after receiving described downlink transmission synchronous response on the HS-DSCH channel.
Wherein, described downlink transmission synchronous response comprise CFN and the time of advent TOA field, wherein, the value of CFN is the value of CFN in the downlink transmission synchronous control frame.
In the technique scheme, described HS-DSCH channel data frame type is Class1 or type 2, and the value of TOA field is in the described downlink transmission synchronous response: the current C FN of Node B and downlink transmission synchronous control frame CFN's and long-pending with Frame length; Described HS-DSCH channel data frame type is a type 3, and the value of the TOA field of described downlink transmission synchronous response is provided with according to the time of reception window of Node B configuration.
In the technique scheme, the CFN of the current maintenance of described calculating RNC is: the value of CFN and TOA/ Frame length sum are as the CFN of the current maintenance of RNC in the calculating downlink transmission synchronous response, and described Frame length is 10ms.
In the technique scheme, described RNC upgrades according to the CFN of timing relationship to current maintenance, and this timing relationship is that CFN adds 1 every a data frame length, and described Frame length is 10ms.
In the technique scheme, this method further comprises: RNC periodically sends downlink transmission synchronous control frame, adjusts the CFN of self maintained in real time.
Radio network controller provided by the invention obtains the method for Connection Frame Number at high speed descending sharing channel, when UE downlink bearing channel all is the HS-DSCH channel, send downlink transmission synchronous control frame by RNC to Node B, the downlink transmission synchronous response of returning according to Node B obtains CFN accurately, thereby can be when UE sets up the HS-DSCH channel service or direct-cut operation takes place, improve the accuracy that RNC obtains CFN, avoid when follow-up radio configuration changes obtaining less than CFN or the CFN that gets access to inaccurate because of RNC, cause RNC, the entry-into-force time difference of Node B and UE configuration, cause problems such as loss of data and flow process failure, thereby improved the performance of system and offered quality of services for users.
Description of drawings
Fig. 1 is the composition schematic diagram of UMTS basic structure in the prior art;
Fig. 2 obtains the method flow schematic diagram of Connection Frame Number at the HS-DSCH channel for RNC of the present invention;
Fig. 3 forms schematic diagram for the structure of the downlink transmission synchronous control frame that RNC sends;
Fig. 4 forms schematic diagram for the structure of the downlink transmission synchronous response that Node B sends.
Embodiment
Basic thought of the present invention is: when UE downlink bearing channel all was the HS-DSCH channel, RNC sent downlink transmission synchronous control frame on the HS-DSCH channel; After Node B receives this downlink transmission synchronous control frame, according to the type of this HS-DSCH channel data frame, send downlink transmission synchronous response to RNC, RNC calculates the CFN of current maintenance according to this downlink transmission synchronous response.When RNC changes in radio configuration, the timing that reconfigures according to the relative time setting of the CFN of activationary time in the radio configuration change information and current maintenance, reconfigure timing accurately thereby can obtain, avoid problems such as the loss of data that causes because of RNC, Node B and the asynchronism(-nization) of UE configuration take-effective and flow process failure.
Fig. 2 obtains the method flow schematic diagram of Connection Frame Number for RNC of the present invention at the HS-DSCH channel, and as shown in Figure 2, this method comprises:
In this step, RNC carries CFN in downlink transmission synchronous control frame.
In this step, the value of the CFN that carries in the downlink transmission synchronous response is the CFN of downlink transmission synchronous control frame, and when HS-DSCH channel data frame type was Class1 or type 2, the value of TOA field was in this downlink transmission synchronous response: TOA=(CFN of the current C FN-downlink transmission synchronous control frame of Node B) * Frame length; When HS-DSCH channel data frame type was type 3, the value of TOA field was provided with according to the time of reception window of Node B configuration in this downlink transmission synchronous response.
The principle of aforementioned calculation TOA is: the side-play amount of obtaining the CFN that carries in the current C FN of Node B and the downlink transmission synchronous control frame earlier; According to Frame length, obtain time difference again.
In this step, RNC is according to the equivalent CFN that calculates current maintenance of CFN, the TOA of downlink transmission synchronous response, the CFN+TOA/ Frame length in the CFN=downlink transmission synchronous response of current maintenance.
The process of the CFN of the current maintenance of aforementioned calculation is actual to be exactly the inverse operation that TOA calculates, its principle is: earlier by RNC according to TOA value in the downlink transmission synchronous response and Frame length, obtain the side-play amount of the CFN that carries in the current C FN of Node B and the downlink transmission synchronous control frame; Then, according to the CFN in the downlink transmission synchronous response, obtain the CFN of the current maintenance of RNC.
The CFN of step 50, the current maintenance of RNC carries out CFN according to timing relationship to be upgraded, and promptly CFN adds 1 every a data frame length.
In the said method, RNC can periodically send downlink transmission synchronous control frame, the CFN that adjusts RNC in real time and safeguarded according to the CFN of Node B.
Specify RNC of the present invention obtains the method for Connection Frame Number at the HS-DSCH channel implementation procedure below in conjunction with embodiment and accompanying drawing.
After the HS-DSCH channel is set up, between RNC and Node B, carry out the transmission and the reception of transmission synchronous control frame: RNC and send downlink transmission synchronous control frame to Node B; After receiving downlink transmission synchronous control frame, Node B returns downlink transmission synchronous response and gives RNC.With the HS-DSCH data frame type is that HS-DSCH DATA FRAME TYPE 2 is an example, specifies RNC obtains CFN on the HS-DSCH channel method, and this method comprises:
After user's face of step 1, RNC was set up the HS-DSCH channel of corresponding UE data service, RNC user sent downlink transmission synchronous control frame towards Node B;
Fig. 3 forms schematic diagram for the structure of the downlink transmission synchronous control frame that RNC sends, and as shown in Figure 3, the value of frame type is set to 1, and the value of control frame type is provided with 0x03, and the value of CFN field is set to initial value, and fills in crc field.Wherein, if set up link for the first time, then the initial value of CFN field can be set to 0, if the direct-cut operation scene, then the value of CFN field can be set to the current C FN that RNC safeguards.
Step 2, Node B send downlink transmission synchronous response to RNC after receiving downlink transmission synchronous control frame on the HS-DSCH channel;
Fig. 4 forms schematic diagram for the structure of the downlink transmission synchronous response that Node B sends, as shown in Figure 4, wherein the value of frame type is set to 1, the value of control frame type is set to 0x04, the value of CFN field is set to the CFN of downlink transmission synchronous control frame, and the TOA field is according to the calculated value setting of the CFN of the CFN of Node B and downlink transmission synchronous control frame, and Frame length is 10ms, wherein, TOA value=(CFN of the current C FN-downlink transmission synchronous control frame of Node B) * 10.
Step 3, RNC user's face are after receiving downlink transmission synchronous response on the HS-DSCH channel, according to the equivalent CFN that calculates the current maintenance of RNC of CFN, the TOA of this downlink transmission synchronous response;
CFN+TOA/10 in the CFN=downlink transmission synchronous response of current maintenance.
The CFN of step 4, the current maintenance of RNC upgrades according to timing relationship, i.e. the CFN of current maintenance adds 1 every 10ms.
In the said method, RNC can periodically send downlink transmission synchronous control frame, the CFN that adjusts RNC in real time and safeguarded.
Above embodiment is described, only is preferred embodiment of the present invention, and only be used to illustrate that the present invention is applied to the HS-DSCH channel, and do not get rid of the situation that is applied to other channels, be not to be used to limit protection scope of the present invention.
Claims (9)
1. a radio network controller obtains the method for Connection Frame Number at high speed descending sharing channel, the data service that radio network controller (RNC) is initiated according to end user device UE, set up the high speed downlink shared channel HS-DSCH channel, it is characterized in that this method comprises: RNC sends downlink transmission synchronous control frame on the HS-DSCH channel; After node Node B receives described downlink transmission synchronous control frame, send downlink transmission synchronous response to RNC according to HS-DSCH channel data frame type; RNC calculates the Connection Frame Number CFN of the current maintenance of RNC according to described downlink transmission synchronous response after receiving described downlink transmission synchronous response on the HS-DSCH channel.
2. radio network controller according to claim 1 obtains the method for Connection Frame Number at high speed descending sharing channel, it is characterized in that, described downlink transmission synchronous response comprise CFN and the time of advent TOA field, wherein, the value of CFN is the value of CFN in the downlink transmission synchronous control frame.
3. radio network controller according to claim 2 obtains the method for Connection Frame Number at high speed descending sharing channel, it is characterized in that,
Described HS-DSCH channel data frame type is Class1 or type 2, and the value of TOA field is in the described downlink transmission synchronous response: the current C FN of Node B and downlink transmission synchronous control frame CFN's and long-pending with Frame length;
Described HS-DSCH channel data frame type is a type 3, and the value of the TOA field of described downlink transmission synchronous response is provided with according to the time of reception window of Node B configuration.
4. radio network controller according to claim 3 obtains the method for Connection Frame Number at high speed descending sharing channel, it is characterized in that the CFN of the current maintenance of described calculating RNC is: the value of CFN and TOA/ Frame length sum are as the CFN of the current maintenance of RNC in the calculating downlink transmission synchronous response.
5. radio network controller according to claim 4 obtains the method for Connection Frame Number at high speed descending sharing channel, it is characterized in that described Frame length is 10ms.
6. obtain the method for Connection Frame Number according to each described radio network controller of claim 1 to 4 at high speed descending sharing channel, it is characterized in that described RNC upgrades according to the CFN of timing relationship to current maintenance.
7. radio network controller according to claim 6 obtains the method for Connection Frame Number at high speed descending sharing channel, it is characterized in that described timing relationship is that CFN adds 1 every a data frame length.
8. radio network controller according to claim 7 obtains the method for Connection Frame Number at high speed descending sharing channel, it is characterized in that described Frame length is 10ms.
9. radio network controller according to claim 8 obtains the method for Connection Frame Number at high speed descending sharing channel, and it is characterized in that this method further comprises: RNC periodically sends downlink transmission synchronous control frame, adjusts the CFN of self maintained in real time.
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| CN 200810227363 CN101742556B (en) | 2008-11-27 | 2008-11-27 | Method for acquiring connection frame number in high-speed downlink shared channel by radio network controller |
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| CN 200810227363 CN101742556B (en) | 2008-11-27 | 2008-11-27 | Method for acquiring connection frame number in high-speed downlink shared channel by radio network controller |
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Effective date of registration: 20171214 Address after: 518000, two 703A, COFCO business park, two Xian Xian Road, Xin'an, Shenzhen, Guangdong, Baoan District Patentee after: Shenzhen Fu Hai Sunshine Technology Co., Ltd. Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Patentee before: ZTE Corporation |
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