CN101022641B

CN101022641B - Method and system for CRNC obtaining cell SFN

Info

Publication number: CN101022641B
Application number: CN2007101356545A
Authority: CN
Inventors: 艾建勋
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2007-03-01
Filing date: 2007-03-01
Publication date: 2012-07-11
Anticipated expiration: 2027-03-01
Also published as: CN101022641A

Abstract

A method of using GRNC to obtain cell SFN includes obtaining the first D-value by CRNC through synchronous process to Iub interface node of NodeB i.e. D-value between RFN of CRNC and BFN of NodeB, reporting the second D-value to CRNC by NodeB i.e. D-value between SFN of cell and BFN of NodeB, using RFN then adding two said D-values to obtain SFN by CRNC.

Description

A kind of CRNC obtains the method and system of cell SFN

Technical field

The present invention relates to wireless communication technology, relate in particular to the method that CRNC in a kind of TD-SCDMA system (Control Radio Network Controller, control radio network controller) obtains cell SFN (System Frame Number, system frame number).

Background technology

In the TD-SCDMA system, the inner independent retention time RFN of RNC (Radio Network Controller, radio network controller) (RNC Frame Number, RNC frame number); The inner independent retention time BFN of NodeB (NodeB Frame Number, NodeB frame number) obtains.Simultaneously, system definition the SFN of air interface.RFN, BFN, SFN whenever add 1 back to 4096 deliverys at a distance from the TD-SCDMA system-frame time (10ms), its span from 0 to 4095.

Difference DIFF_BFN_RFN between RFN and the BFN can obtain through the RNC and the NodeB intermediate node synchronizing process of protocol definition.

The SFN value is safeguarded by NodeB.Under the condition of having used the external time reference, in the TD-SCDMA system, BFN has following relation:

SFN?mod?256＝BFN?mod?256。

Though SFN and BFN safeguard that by NodeB a moment, the two might not equate, therefore, can not directly BFN be used as SFN.

MBMS (the Multimedia Broadcast/Multicast Service that increases newly in the TD-SCDMA system; Multimedia broadcasting/multicast services) in the business; CRNC (referring to be in the RNC under the functional status of control sub-district) specifies NodeB on physical channel MICH, to send the MICH CFN of MBMS notification at Iub chain of command message MBMSNOTIFICATION UPDATE COMMAND, and this MICH CFN should respective cell SFN.CRNC need know the SFN value of a sub-district, so that specify NodeB to send MBMS Notification signaling in the suitable moment.And in the prior art, the technology of the SFN value that CRNC obtains the sub-district is not provided, like this, CRNC can't confirm to send the SFN value of MBMSNotification.

Summary of the invention

The object of the present invention is to provide a kind of CRNC to obtain the method for cell SFN, through this method, CRNC can obtain the NodeB that this RNC controls and go up the accurate SFN value of the sub-district of setting up.Utilize this SFN value, CRNC can realize specifying NodeB to send the specific signal of eating dishes without rice or wine in the specific moment.

In order to realize the foregoing invention purpose; One aspect of the present invention provides a kind of CRNC to obtain the method for cell SFN; Comprise step: the said CRNC of a. is through obtaining first difference with the Iub interface node synchronizing process of NodeB, i.e. the difference of the BFN of the RFN of this CRNC and NodeB; B. said NodeB reports second difference to CRNC, i.e. the difference of the BFN of the SFN of said sub-district and this NodeB; C. said CRNC adds the above first difference with RFN and second difference obtains SFN.

Preferably, in step b, it is to set up in the process or after setting up in the sub-district to report that said NodeB reports second difference to CRNC.

Preferably, in step b, it is perhaps to have the mode that increases cell in the Iub chain of command message newly through newly-increased Iub control signaling to realize that said NodeB reports second difference to CRNC.

The present invention provides a kind of CRNC to obtain the system of cell SFN on the other hand; The CRNC and the NodeB that comprise intercommunication mutually; Said CRNC comprises: acquiring unit is used for through obtaining first difference with the Iub interface node synchronizing process of NodeB, i.e. the difference of the BFN of the RFN of this CRNC and NodeB; Said NodeB comprises: report the unit, be used for reporting second difference to CRNC, i.e. the difference of the BFN of the SFN of said sub-district and this NodeB; Said CRNC also comprises: computing unit is used for RFN is added the above first difference and second difference obtains SFN.

It is preferably, said that to report the unit to report second difference be after the sub-district is set up in the process or set up, to report.

It is preferably, said that to report the unit to report second difference be to realize through newly-increased Iub control signaling or the mode that in existing Iub chain of command message, increases cell newly.

Embodiment of the present invention has following beneficial effect:

Pass through embodiment of the present invention; CRNC can obtain the NodeB that this RNC controls and go up the accurate SFN value of the sub-district of setting up; Utilize this SFN value; CRNC can realize specifying NodeB to send the specific signal of eating dishes without rice or wine in the specific moment, thereby has filled up the blank of prior art, for the enforcement of business such as MBMS provides technological prerequisite.

Description of drawings

Fig. 1 obtains the structure chart of a preferred embodiment of the system of cell SFN for CRNC provided by the invention;

Fig. 2 obtains the flow chart of a preferred embodiment of the method for cell SFN for CRNC provided by the invention;

Fig. 3 obtains the flow chart of another preferred embodiment of the method for cell SFN for CRNC provided by the invention.

Embodiment

With reference to figure 1, illustrate the structure of a preferred embodiment that CRNC provided by the invention obtains the system of cell SFN.As shown in the figure; Said system comprises the CRNC and the NodeB of intercommunication mutually; Said CRNC comprises: acquiring unit is used for through obtaining first difference with the Iub interface node synchronizing process of NodeB, i.e. the difference of the BFN of the RFN of this CRNC and NodeB (below be called DIFF_BFN_RFN); Said NodeB comprises: report the unit, be used for reporting second difference to CRNC, be i.e. the difference of the BFN of the SFN of said sub-district and this NodeB (below be called DIFF_SFN_BFN); Said CRNC also comprises: computing unit is used for RFN is added that DIFF_BFN_RFN and DIFF_SFN_BFN obtain SFN.It should be noted that said each unit all can implement with the form of software the mode of Signalling exchange (promptly with), certainly, do not get rid of with hardware or firmware and implement.The method of introducing below provided by the invention is promptly implemented in this system, and therefore, the explanation to method also belongs to the aid illustration to system below.

With reference to figure 2, illustrate the flow process of a preferred embodiment that CRNC provided by the invention obtains the method for cell SFN.As shown in the figure, this method comprises:

Step 201: said CRNC is through obtaining DIFF_BFN_RFN with the Iub interface node synchronizing process of NodeB; This step can be implemented with reference to the mode of existing standard.

Step 202: said CRNC sends the sub-district to NodeB and sets up request, i.e. CELLSETUP REQUEST message; This message request NodeB sets up the sub-district.

Step 203: said NodeB sends the sub-district to CRNC and sets up response, i.e. the request of step is gone up in response, and promptly CELL SETUP RESPONSE message in this chain of command message, increases a cell newly, and this cell carries DIFF_SFN_BFN; This step promptly is the step that NodeB reports DIFF_SFN_BFN, promptly in setting up the process of sub-district, reports DIFF_SFN_BFN.SFN-BFN OFFSET promptly is the cell that increases newly in the following table:

Agreement/group name is claimed

The place

Scope

Protocol type and reference

Semantic description

The key degree

The crucial degree that distributes

Message?Discriminator

M

9.2.1.45

-

Message?Type

M

9.2.1.46

YES

reject

Transaction?ID

M

9.2.1.62

-

SFN-BFN?offset

M

-

Criticality?Diagnostics

O

9.2.1.17

YES

ignore

Step 204: said CRNC calculates SFN, promptly adopts formula S FN=RFN+DIFF_BFN_RFN+DIFF_SFN_BFN to calculate.Because CRNC self can obtain RFN, has obtained described two differences through above-mentioned steps again, therefore can calculate SFN.

With reference to figure 3, illustrate the flow process of another preferred embodiment that CRNC provided by the invention obtains the method for cell SFN.As shown in the figure in conjunction with Fig. 2, to compare with a last embodiment, this embodiment difference is, NodeB uploads DIFF_SFN_BFN is after the sub-district is set up, and uploads through the mode that has increased an Iub communication signaling newly, i.e. step 304 among Fig. 3.Step 302 and 303 is exactly the common process of setting up the sub-district, does not transmit DIFF_SFN_BFN, this with Fig. 2 in to some extent the difference.Remaining step function is the same with Fig. 2, repeats no more at this.

The foregoing description is proposed by the invention next in order to understand better, and unrestricted claim of the present invention.

Claims

1. a CRNC obtains the method for cell SFN, it is characterized in that, comprises step:

A. said CRNC is through obtaining first difference with the Iub interface node synchronizing process of NodeB, i.e. the difference of the BFN of the RFN of this CRNC and NodeB;

B. said NodeB reports second difference to CRNC, i.e. the difference of the BFN of the SFN of said sub-district and this NodeB;

C. said CRNC adds the above first difference with RFN and second difference obtains SFN.

2. CRNC according to claim 1 obtains the method for cell SFN, it is characterized in that, in step b, it is to set up in the process or after setting up in the sub-district to report that said NodeB reports second difference to CRNC.

3. obtain the method for cell SFN according to the CRNC described in claim 1 or the 2 any claims; It is characterized in that; In step b, it is perhaps to have the mode that increases cell in the Iub chain of command message newly through newly-increased Iub control signaling to realize that said NodeB reports second difference to CRNC.

4. a CRNC obtains the system of cell SFN, comprises the CRNC and the NodeB of intercommunication mutually, it is characterized in that said CRNC comprises:

Acquiring unit is used for through obtaining first difference with the Iub interface node synchronizing process of NodeB, i.e. the difference of the BFN of the RFN of this CRNC and NodeB;

Said NodeB comprises:

Report the unit, be used for reporting second difference, i.e. the difference of the BFN of the SFN of said sub-district and this NodeB to CRNC;

Said CRNC also comprises:

Computing unit is used for RFN is added the above first difference and second difference obtains SFN.

5. CRNC according to claim 4 obtains the system of cell SFN, it is characterized in that, said to report the unit to report second difference be after the sub-district is set up in the process or set up, to report.

6. obtain the system of cell SFN according to the CRNC described in claim 4 or the 5 any claims; It is characterized in that said to report the unit to report second difference be to realize through newly-increased Iub control signaling or the mode that in existing Iub chain of command message, increases cell newly.