CN101052225B

CN101052225B - Processing method for call abnormal situation

Info

Publication number: CN101052225B
Application number: CN 200710078378
Authority: CN
Inventors: 李贵勇; 何兰; 陈贤亮; 王小华
Original assignee: Chongqing Cyit Communication Technologies Co Ltd
Current assignee: Keen (Chongqing) Microelectronics Technology Co., Ltd.
Priority date: 2007-04-11
Filing date: 2007-04-11
Publication date: 2012-06-13
Anticipated expiration: 2027-04-11
Also published as: CN101052225A

Abstract

The invention provides a method for treating abnormal call by a UE. Within a period of time when RRC connection is established and enters the CELL_FACH state and the UE sends a CELL CONFIRMED message to a network side, if the call connection can not continue (namely the connection is successful or failure), the UE locally releases the PRC connection, which avoids the UE always in the CELL_FACH state while not releasing the PRC connection and the call, and greatly improves the stability of the UE. In the inventive treatment method, a timing device (for short Timer) is arranged on a CC layer of the UE side, when the UE is called to send the CALL CONFIRMED message, the Timer is started, the Timer is stopped when the CC layer enters other states except a call received state, the RRC connection is released after the Timer is overtime, and the Timer returns an idle mode.

Description

A kind of processing method of call abnormal situation

Technical field

The present invention relates to a kind of processing method of call abnormal situation, particularly a kind of 3G (Third Generation) Moblie user terminal (being called for short UE) is to the processing method of call abnormal situation.

Background technology

In 3-G (Generation Three mobile communication system), the call management functionality in circuit switching (abbreviating CS as) territory is mainly accomplished in calling control (the abbreviating CC as) sublayer that is in connection management (the abbreviating CM as) layer, is the core of whole C M layer.According to whether having set up Radio Resource control connection (abbreviating RRC as connects), UE can be in idle pulley or connection mode respectively.4 kinds of different state are arranged when UE is in connection mode, be respectively: CELL_DCH state, CELL_FACH state, CELL_PCH state and URA_PCH state.And when UE is in the CELL_FACH state of connection mode; Do not exist DPCH to be connected between UE and the UTRAN (UMTS Terrestrial radio access network); UE at down direction with continuous monitoring FACH (forward access channel); And can use public or shared channel (like RACH, RACH) at up direction.Therefore, the CELL_FACH state does not have the same/detection of loss of mains mechanism of CELL_DCH state.

When UE is called; At first initiate RRC and connect the process of setting up, if network requirement UE gets into the CELL_FACH state, UE is after having sent call confirmation message (being called CALL CONFIRMED message) so; To wait for that network side initiates radio bearer and set up process; After radio bearer was set up successfully, UE will be from CELL_FACH transition between states to the CELL_DCH state, and sends ALERTING message (being called ALERTING message) and offhook message (being called CONNECT message) thereupon; After the off-hook acknowledge message of receiving network side (being called CONNECT ACKNOWLEDGE message), access success.If because radio bearer is set up not success or other reasons; Network side will send RRC connection release message (being called RRC CONNECTION RELEASE message); Notice UE discharges RRC and connects; Come back to idle pulley, this situation will cause call failure, and this time RRC connects and will be released.Obviously; If because some reason, UE does not receive the radio bearer of network side transmission and sets up message (being called RADIO BEARERSETUP message) or RRC connection release message etc., will cause calling out and to proceed; UE will keep the CELL_FACH state; At this moment, because UE has timer to continue this calling procedure of monitoring, and there is not reason such as detection of loss of mains mechanism yet; To finally cause this called process successfully not set up, and initiatively can't not discharge calling this time under the situation of on-hook at UE.

Summary of the invention

The present invention proposes the processing method of a kind of UE to call exception; Guarantee UE RRC connect set up successfully get into the CELL_FACH state after; If sent CALL CONFIRMED message to network after, call out in a period of time to connect and to proceed (being successful connection or failure); UE discharges RRC with this locality and connects, and avoids UE to be in the CELL_FACH state always and can't discharge that this RRC connects and this time call out, and has greatly improved the stability of UE.

Processing method of the present invention is provided with a timer (abbreviating Timer as) at the CC of UE side layer;, sent UE opening timing device Timer after the CALL CONFIRM message when being called out;, the CC layer stops timer Timer when getting into other states except that call reception (abbreviating call received as); And at the overtime back release of timer Timer RRC connection, returning to idle mode.

Processing method of the present invention can define at the title and the timing (being called the cycle again) of the timer that the CC of UE side layer is provided with as required, and its cycle can be defined as 30 seconds-60 seconds usually.

Processing method of the present invention compared with prior art; Through increasing the timer of a CC layer; With monitoring transmission the calling procedure after the CALL CONFIRMED message; Avoid the phenomenon that (the particularly abnormal conditions under the CELL_FACH state) UE can't discharge this RRC connection and this time call out under abnormal conditions, greatly improved the stability of UE.

Description of drawings

The sketch map of UE and network side interacting message in the called process in the normal CS of Fig. 1 prior art territory (early assigning);

The sketch map of UE and network side interacting message under the called process exception situation in Fig. 2 prior art CS territory;

The sketch map of Fig. 3 processing method embodiment of the present invention UE and network side interacting message under call abnormal situation.

Below in conjunction with accompanying drawing call abnormal situation processing method according to the invention is further described.

Accompanying drawing 1 is the sketch map of middle UE of the called process in the normal CS of prior art territory (early assigning) and network side interacting message.So-called " early assigning " is meant network side after receiving CALL CONFIRMED message, can initiate the process that radio bearer is set up immediately.Can know that by figure after radio bearer is set up successfully, UE will send ALERTING message and CONNECT message, after the CONNECTACKNOWLEDGE message of receiving automatic network, access success, calling both sides can be carried out normal talking.

Accompanying drawing 2 is sketch mapes of UE and network side interacting message under the called process exception situation in prior art CS territory.Can know by figure, when UE does not receive the radio bearer of automatic network to set up message or RRC connection release message, will be in the CELL_FACH state always, can't discharge this time and call out.

Accompanying drawing 3 is sketch mapes of processing method embodiment of the present invention UE and network side interacting message under call abnormal situation.Fig. 3 (A) be processing method embodiment of the present invention under call abnormal situation, the local RRC of release in the overtime back of timer Timer connects the sketch map of returning to idle mode.Fig. 3 (B) is processing method embodiment of the present invention when the CC layer gets into other states, stops the sketch map of timer Timer.

Can know that by Fig. 3 (A) and Fig. 3 (B) processing method embodiment of the present invention may further comprise the steps:

1, at the CC of UE side layer timer T_callCnf (30 seconds cycles) is set, has sent when called to monitor to call out after the CALL CONFIRMED message and whether normally carried out;

2, after the CC layer sends CALL CONFIRMED message, open T_callCnf, and get into called confirmation (being called mobile terminating call confirmed) state;

3, after the CC layer gets into other states except that call reception " call received ", promptly stop T_callCnf;

4, the overtime back of T_callCnf UE discharges this time and calls out, and the local RRC of release of CC layer connects, and gets into " null " (sky) state.

In this embodiment, UE side CC layer entering other states except that call reception " call received " comprise:

1. called process is normally carried out, and the CC layer will send CONNECT message, and opening timing device T313 gets into connection request (being called connect request) state;

2. initiatively on-hook of UE, the CC layer will send disconnection (being called DISCONNECT) message, and opening timing device T305 gets into disconnection request (being called disconnect request) state;

3. the CC layer has been received release (being called DISCONNECT, RELEASE) or has been discharged and accomplished (being called RELEASE COMPLETE) message, and the CC layer will get into " null " state or open T308 and get into request (the being called release request) state that discharges.

The inventive method also can have other various embodiments; Under the situation of spirit that does not deviate from the inventive method and essence thereof; Those skilled in the art work as can make various corresponding changes or distortion according to the inventive method, but these corresponding changes or distortion all belong to the claim protection range of the inventive method.

Claims

1. a UE is to the processing method of call abnormal situation; It is characterized in that: the CC layer is provided with a timer Timer in the calling control sublayer of UE side; When UE was called out, opening timing device Timer after getting into the CELL_FACH state and having sent CALL CONFIRM message stopped timer Timer when the CC layer gets into other states except that call reception call received; Or at the overtime back release of timer Timer RRC connection, returning to idle mode.

2. according to the said processing method of claim 1, it is characterized in that: the title and the timing of the timer that is provided with at the CC of UE side layer, i.e. in the cycle, define as required, its period definition is 30 seconds-60 seconds.

3. according to the said processing method of claim 1, it is characterized in that: other states that UE side CC layer gets into except that call reception comprise:

1. called process is normally carried out, and the CC layer will send CONNECT message, and opening timing device T313 gets into connection request connect request state;

2. initiatively on-hook of UE, the CC layer will send disconnection DISCONNECT message, and opening timing device T305 gets into disconnection request disconnect request state;

3. the CC layer has been received release DISCONNECT, RELEASE or has been discharged and accomplished RELEASE COMPLETE message, and the CC layer will get into " null " state or open T308 and get into the request release request state that discharges.