CN102195744A

CN102195744A - Exception handling method for tandem free operations and transcoder

Info

Publication number: CN102195744A
Application number: CN2010101345716A
Authority: CN
Inventors: 曾永慧
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-03-12
Filing date: 2010-03-12
Publication date: 2011-09-21

Abstract

The invention discloses an exception handling method for tandem free operations and a transcoder. The method comprises that: the transcoder (TC) establishes the tandem free operations (TFO), wherein the TFOs are used for reducing tandem transcoding operations among a plurality of mobile stations; the TC detects the exception of the TFOs; and the TC performs ignore TFO (IT), wherein the IT comprises the TFO disabling notification message transmission of the TC to a base transceiver station. By the method and the transcoder, full processing after the establishment of the TFOs is failed is realized.

Description

The abnormality eliminating method and the sign indicating number type transducer that do not have sign indicating number type transducer cascade operation

Technical field

The present invention relates to the communications field, in particular to a kind of abnormality eliminating method and sign indicating number type transducer that does not have yard type transducer cascade operation.

Background technology

In traditional mobile communication system, between travelling carriage (Mobile Station abbreviates MS as), call out, need on whole transmission link, carry out the cascade operation of twice encoding and decoding speech, therefore can reduce voice quality.

In order to address this problem, tandem free cascade operation (Tandem Free Operation abbreviates TFO as) has been proposed in the correlation technique.This TFO is positioned at the sign indicating number type transducer (Transcoder abbreviates TC as) of mobile communication system, is carrier with the pcm stream that transmits between the TC, and realizes that by the mode of inserting in-band signalling the code decode algorithm between the MS consults.When consensus, TFO is inserted into the form of voice messaging with the TFO frame in the pcm stream, is parsed to open up by the opposite end and passes to MS.Therefore, TFO can make the cascade operation that reduces by an encoding and decoding speech in the transmission course, thereby improves voice quality.

3GPP agreement 28.062 series have specifically described the realization of TFO.This agreement relates to the TFO state machine of a complexity, and has defined some TFO states, behavior and incident, take place by Event triggered state transition and behavior, thus the function of realization TFO.

Table 1 is the state table of TFO state machine, and is as shown in table 1, described the Status Name of TFO state machine respectively, and the abbreviation of this state and state description.

Table 1 is the state table of TFO state machine

Status Name	Be called for short	State description
			Not_Active	NAC	Initial condition, TFO_Protocol is not activated
Wakeup	WAK	TFO_Protocol waits for the PCM_NON_Idle incident
			FirstTry	FIT	Begin the state of TFO interacting message first with far-end
C_Retry	COR	Be connected with the TFO of far-end and be interrupted, attempt mutual then again
			P_Retry	PER	Cycle initiates mutual to far-end, attempt the state that connects
Monitor	MON	Do not initiate only to monitor far-end TFO condition of information alternately
			Mismatch	MIS	Detect unmatched state with far-end TFO
Fast_Try	FAT	Again attempt state of interaction behind local the switching
			Fast_Con	FAC	Again attempt the state that TFO sets up behind local the switching
Contact	CON	Connect with far-end, detect the state of link
			Wait_RC	WRC	Under the AMR algorithm, wait for that BTS finishes the state of rate controlled
Konnect	KON	Send the TFO frame, prepare the state that TFO sets up
			Re_Kon	REK	When far-end switches, attempt setting up the state of TFO again
Sync_Lost	SOS	Whether monitoring is the state that far-end switches
			Operation	OPE	The major state that TFO sets up
TFO_Term	TT	TFO sets up and is about to stop, and waits for the state that far-end is confirmed
			Failure	FAI	Monitor the far-end mistake, stop the state that TFO connects

Simultaneously, in the implementation procedure of the TFO state machine in TC, if use adaptive multi-rate (Adaptive Modulation Rate between the MS, abbreviate AMR as) algorithm, TC also needs and base station (Base Transceiver Station, abbreviate BTS as) carry out alternately, so that functions such as realization speed adjustment.Therefore, BTS also needs a state machine, and its state is corresponding with above-mentioned TFO state machine.

Table 2 is the state table of BTS state machine, and is as shown in table 2, described the Status Name of BTS state machine and the state description of this state respectively.Need to prove that can there be multiple corresponded manner in the state of the state of this BTS state machine and TFO state machine, for example, the TFO_NO in the corresponding BTS state machine of WAK in the TFO state machine and FIT state.

Table 2 is the state table of BTS state machine

Status Name	State description
		TFO_DIS	State when TFO does not enable
TFO_NO	TFO enables, but does not set up
		TFO_MAYBE	In the process that TFO is setting up, but not success as yet
TFO_YES	The state that TFO has set up
		TFO_TERM	TFO is in foundation, but termination soon

But, in the process of above-mentioned realization TFO state machine, also there are some problems, may cause the corresponding inconsistent problem of state of the state and the BTS state machine of TFO state machine, perhaps the corresponding inconsistent problem of TFO state machine and TC behavior.Below respectively from the TFO state machine at WRC state, TFO state machine aspect two of the KON states, this problem is specifically described.

Table 3 is the state transition and the action schedule of WRC state and KON state, and is as shown in table 3, described the TFO state machine at WRC state and KON state, and the incident of this state, action and action specification.

The state transition of table 3 WRC state and KON state and action schedule

State	Incident	Action	Action specification
				FIT/CON	TFO_ACK	C; RCi; ACK; T1; WRC	Receive the ACK message and the coupling of opposite end, then flush message formation; Initiate rate adjustment request; Send several A CK message to the opposite end; Timer T1=1s is set; Enter the WRC state.
WRC	TFO_Frame	AT; WRC;	Receive the TFO frame and the coupling of opposite end, then accept the TFO frame; Still at the WRC state.
				WRC	Rc_Ack	C; ACK1; T; BT; T; T2; KON;	Receive the rate adjustment request answer of base station, then flush message formation; Send 1 ACK message earlier to the opposite end, send 1 TRANS message then, begin to send the TFO frame again, in the TFO frame, embed again and send 1 TRANS message; Timer T2=2s is set.Enter the KON state.
1. WRC	T==0	C; RCm; FAI;	Timer then, the restriction that speed is adjusted is decontroled in then flush message formation.Enter the FAI state.
				2. WRC	Runout	C; RCm; FAI;	Local terminal sends message and finishes, and the restriction that speed is adjusted is decontroled in then flush message formation.Enter the FAI state.
3. KON	T==0	C; RCm; DT; N; FAI;	Timer then, the restriction that speed is adjusted is decontroled in then flush message formation, stops the transmission of TFO frame, sends Normal message to the opposite end, enters the FAI state.
				4. FAI	Fram_Sync_Lost	---	There is not response.

When (1) state of TFO state machine is WRC

When using the AMR algorithm between MS, if the TC negotiated match, then the TFO state machine among the TC enters the WRC state.Need to prove that the WRC state is that the state that speed is adjusted is finished in local TC wait base station.After base station and opposite end TC finished the speed adjustment, local TC just sent the TFO frame to opposite end TC.Like this, can guarantee within the rate set that TFO frame rate that local TC sends allows to use at opposite end TC, thereby guarantee that this TFO frame accepted by opposite end TC, so that finish the intercommunication of TFO frame.

TFO state machine in TC enters after the WRC state, and TC can be to BTS transmission rate adjustment request, and this rate adjustment request sends to BTS by TFO_SOON notice configuration frame.BTS will enter the TFO_MAYBE state, and begin to carry out this rate adjustment request after receiving this notice configuration frame.Simultaneously, BTS also replys Rc_Ack message to TC.Only after TC received Rc_Ack message, the TFO state machine among the TC just can leave the WRC state, enters the KON state, prepared to begin to send the TFO frame.

After BTS transmission rate adjustment request, above-mentioned TC (local TC) also will start a timer T1 (this timer can be set to 1 second).Simultaneously, local TC also needs to send to opposite end TC the answer message of predetermined quantity.If local TC does not receive the Rc_ACK (promptly the situation in the table 3 1.) that BTS replys at this T1 in the time, perhaps local TC the answer message of the predetermined quantity that sends to opposite end TC sent finish after, still do not receive the Rc_ACK (promptly the situation in the table 3 2.) that BTS replys, TFO state machine among the local TC will enter the FAI state, and promptly TFO sets up failure.Need to prove that this FAI state has only been stipulated the flush message formation and decontroled the restriction that speed is adjusted in agreement, do not stipulate other operation (see Table in 3 situation 1. with situation 2.).

But the TFO state machine among the local TC has entered the FAI state at this moment, and the state machine among the BTS also is in the TFO_MAYBE state, promptly produces the corresponding inconsistent problem of state of the state and the BTS state machine of TFO state machine.

In addition, in the time, if opposite end TC has finished the speed adjustment, then opposite end TC will send the TFO frame to local TC at T1.Local TC accepts TFO (Accept TFO abbreviates AT as) with the generation incident after receiving this TFO frame, the mark of accepting the TFO frame among the promptly local TC is changed to AT.But if in subsequent process, local TC does not receive the Rc_ACK message that BTS replys at T1 in the time, and the TFO state machine among the local TC still can enter the FAI state.Local TC still is in AT but simultaneously.Therefore, this will produce the corresponding inconsistent problem with the TC behavior of state of TC state machine.

At this moment, because the TFO state machine among the local TC is when the FAI state, local TC can not send the TFO frame to opposite end TC, thereby causes opposite end TC not receive the TFO frame always, and stops the transmission of TFO frame.To no longer there be the TFO frame in the pcm stream like this.

When (2) state of TFO state machine is KON

When using the AMR algorithm between MS, if the TC negotiated match, local TC receives the answer message of opposite end TC, and the speed adjustment between TC and the BTS finishes, and the TFO state machine among the then local TC enters the KON state.Need to prove that the KON state is the state that local TC prepares to set up TFO.

TFO state machine in local TC enters after the KON state, and local TC is provided with timer T2 (for example this timer can be set to 2 seconds).If local TC is less than the TFO frame that receives in the time at T2 from opposite end TC, the TFO state machine among the then local TC will enter the FAI state from the KON state, and promptly TFO sets up failure.Need to prove that this FAI state has only been stipulated the flush message formation in agreement, and decontrol the restriction that speed is adjusted, stop to send the TFO frame, send Normal message, do not stipulate other operation (see Table in 3 situation 3.) to opposite end TC.

But the state machine among the BTS still is in the TFO_MAYBE state, and local TC still is in AT.Therefore, will produce the corresponding inconsistent problem of state of the state and the BTS state machine of TFO state machine, and produce the corresponding inconsistent problem of state of TC state machine with the TC behavior.

In addition, stipulate in the agreement, the reception TFO frame incident that local TC produces, only when receiving that the TFO number of frames of opposite end TC is not more than predetermined quantity, local TC produces (this predetermined quantity is 5 in the agreement), TFO state machine in local TC enters after the KON state so, if local TC can receive the TFO frame (being that the condition that TFO sets up is set up) from opposite end TC, but the quantity of this TFO frame is more than predetermined quantity, then local TC will can not produce TFO frame incident, and this will cause the TFO of local TC to set up failure under the condition that can set up.The TFO state machine of local TC enters the FAI state the most at last.

Summary of the invention

Main purpose of the present invention is to provide a kind of do not have yard abnormality eliminating method of type transducer cascade operation and sign indicating number type transducer, to address the above problem at least.

In order to address the above problem, according to an aspect of the present invention, provide a kind of yard abnormality eliminating method of type transducer cascade operation that do not have.

The abnormality eliminating method that does not have sign indicating number type transducer cascade operation according to the present invention comprises: TC sets up TFO, and wherein, the sign indicating number type that TFO is used to reduce between a plurality of travelling carriages transforms cascade operation; TC detects TFO and takes place unusual; TC carries out IT, and wherein IT comprises that TC sends TFO to the base station and closes notification message.

Preferably, above-mentioned TC sets up TFO and comprises: TC is to base station transmission rate adjustment request; TC sends the answer message of first predetermined quantity to opposite end TC; TC receives the Rc_Ack from the base station, and wherein, Rc_Ack is used for recovery rate adjustment request; TC receives the answer message from opposite end TC; TC receives the TFO frame from opposite end TC, sets up TFO to finish.

Preferably, above-mentionedly comprise unusually: TC does not receive Rc_Ack in first scheduled time after the transmission rate adjustment request of base station.

Preferably, above-mentionedly comprise unusually: TC does not receive Rc_Ack finishing before opposite end TC sends the answer message of first predetermined quantity.

Preferably, above-mentionedly comprise unusually: TC does not receive the TFO frame in receiving from second scheduled time after the answer message of opposite end TC.

Preferably, if TC in second scheduled time, receives the TFO frame, and the TFO frame is more than second predetermined quantity, and then TC carries out the operation of TFO frame, and wherein, the operation of TFO frame is used for indicating TC to set up TFO.

In order to address the above problem, according to a further aspect in the invention, also provide a kind of TC.

TC according to the present invention comprises: set up module, be used to set up TFO; Detection module is used to detect TFO and takes place unusual; The IT module is used to ignore TFO; The IT module comprises: send submodule, be used for sending TFO to the base station and close notification message.

Preferably, the above-mentioned module of setting up comprises: first sends submodule, is used for to base station transmission rate adjustment request; Second sends submodule, is used for sending to opposite end TC the answer message of first predetermined quantity; First receives submodule, is used to receive the Rc_Ack from the base station; Second receives submodule, is used to receive the answer message from opposite end TC; The 3rd receives submodule, is used to receive the TFO frame from opposite end TC, sets up TFO to finish.

Preferably, above-mentioned detection module comprises: first detection sub-module, be used to detect in first scheduled time after the transmission rate adjustment request of base station, and do not receive Rc_Ack; Second detection sub-module is used to detect finishing before opposite end TC sends the answer message of first predetermined quantity, does not receive Rc_Ack; The 3rd detection sub-module is used to detect in receiving from second scheduled time after the answer message of opposite end TC, does not receive the TFO frame.

Preferably, above-mentioned TC also comprises: TFO frame operational module, be used in second scheduled time, receiving the TFO frame, and the TFO frame is set up TFO during more than second predetermined quantity.

Preferably, above-mentioned TC is applied in the base station sub-system.

By the present invention, adopt TC to set up TFO, and when this TC detects TFO TFO (IGNORE TFO takes place to ignore when unusual, abbreviate IT as), solved in the implementation procedure of the TFO state machine among the TC, the state correspondence of the state of TFO state machine and BTS state machine is inconsistent, and TFO state machine and the corresponding inconsistent problem of TC behavior, thereby has realized that TFO sets up failure complete process afterwards.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is the flow chart according to the abnormality eliminating method of the no sign indicating number type transducer cascade operation of the embodiment of the invention;

Fig. 2 is the flow chart according to the abnormality eliminating method of the no sign indicating number type transducer cascade operation of the embodiment of the invention 1;

Fig. 3 is the flow chart according to the abnormality eliminating method of the no sign indicating number type transducer cascade operation of the embodiment of the invention 2;

Fig. 4 is the structured flowchart according to the TC of the embodiment of the invention;

Fig. 5 is the preferred structure block diagram according to the TC of the embodiment of the invention.

Embodiment

Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.

Fig. 1 is according to the flow chart of the abnormality eliminating method of the no sign indicating number type transducer cascade operation of the embodiment of the invention, comprises that following step S102 is to step S106.

Step S102, TC sets up TFO, and wherein, this TFO is used to reduce the cascade operation of sign indicating number type transducer between a plurality of travelling carriages.

Step S104, TC detect TFO and take place unusual.

Step S106, TC carries out IT, and wherein, this IT comprises that TC sends TFO to the base station and closes notification message.

Pass through above-mentioned steps, the abnormality eliminating method of operating according to the no sign indicating number type transducer cascade of the embodiment of the invention can solve in the implementation procedure of the TFO state machine among the TC, the state correspondence of the state of TFO state machine and BTS state machine is inconsistent, and TFO state machine and the corresponding inconsistent problem of TC behavior.Particularly, this IT can notify the TFO state machine among the local TC of BTS to be in closed condition, thereby the state of the TFO state machine among the maintenance TC and the state of BTS state machine are corresponding consistent, simultaneously, TC is when carrying out IT, the mark of ignoring the TFO frame among the local TC can be changed to IT, thereby make the TFO state machine corresponding consistent with the TC behavior.Therefore, above-mentioned steps has realized that TFO sets up failure complete process afterwards.

Following table 4 has been described according to AT in the TFO state machine of the embodiment of the invention and IT behavior.

AT in the table 4 TFO state machine and IT behavior table

The behavior title	Be called for short	State description
			IGNORE?TFO	IT	Do not receive the TFO frame of far-end, TC is descending to be handled according to traditional coding mode, and TFO_OFF (TFO closes) notification message is sent to the base station
ACCEPT?TFO	AT	Receive the TFO frame of far-end, TC with the TFO frame of receiving open up pass to descending

The process that TC is set up TFO is described in detail below.

1. TC is to base station transmission rate adjustment request.

2. TC sends the answer message of first predetermined quantity to opposite end TC.

3. TC receives the Rc_Ack from the base station, and wherein, Rc_Ack is used for recovery rate adjustment request.

4. TC receives the answer message from opposite end TC.

5. TC receives the TFO frame from opposite end TC, sets up TFO to finish.

By said process, can realize that TC (local TC) and base station and opposite end TC carry out alternately, thereby set up TFO.

But TC may exist unusually in said process.This state correspondence that may produce the state of the TFO state machine among the TC and BTS state machine unusually is inconsistent, and TFO state machine among the TC and the corresponding inconsistent problem of TC behavior.This comprises following three kinds unusually.

(1) TC does not receive Rc_Ack in first scheduled time after the transmission rate adjustment request of base station.

(2) TC finish transmit a reply message before, do not receive Rc_Ack.

(3) TC does not receive the TFO frame in receiving from second scheduled time after the answer message of opposite end TC.

Table 5 is according to the WRC state of the embodiment of the invention and the state transition and the action schedule of KON state.On the basis of table 3,4. 1. table 5 replenished action IT to situation at situation.Be described in greater detail below.

The state transition of table 5 WRC state and KON state and action schedule

State	Incident	Action	Action specification
				FIT/CON	TFO_ACK	C; RCi; ACK; T1; WRC	Receive the ACK message and the coupling of opposite end, then flush message formation; Initiate rate adjustment request; Send several A CK message to the opposite end; Timer T1=1s is set; Enter the WRC state.
WRC	TFO_Frame	AT; WRC;	Receive the TFO frame and the coupling of opposite end, then accept the TFO frame; Still at the WRC state.
				WRC	Rc_Ack	C; ACK1; T; BT; T; T2; KON;	Receive the rate adjustment request answer of base station, then flush message formation; Send 1 ACK message earlier to the opposite end, send 1 TRANS message then, begin to send the TFO frame again, in the TFO frame, embed again and send 1 TRANS message; Timer T2=2s is set.Enter the KON state.
1. WRC	T==0	C; RCm, IT; FAI;	Timer then, the restriction that speed is adjusted is decontroled in then flush message formation.Enter the FAI state.Replenish action IT.
				2. WRC	Runout	C; RCm, IT; FAI;	Local terminal sends message and finishes, and the restriction that speed is adjusted is decontroled in then flush message formation.Enter the FAI state.Replenish action IT.

State	Incident	Action	Action specification
				3. KON	T==0	C; RCm; DT; IT, N; FAI;	Timer then, the restriction that speed is adjusted is decontroled in then flush message formation, stops the transmission of TFO frame, sends Normal message to the opposite end, enters the FAI state.Replenish action IT.
4. FAI	Fram_Sync_Lost	IT; FAI	Replenish action IT.

When 1. situation has been described the TFO state machine among the TC and has been in the WRC state, TC is in first scheduled time after the transmission rate adjustment request of base station, do not receive Rc_Ack (be above-mentioned first kind unusual), thereby enter the FAI state from producing timer expiry incident Timeout.Therefore, in the TFO state machine form in TC, replenish action IT.

When 2. situation has been described the TFO state machine among the TC and has been in the WRC state, TC finish transmit a reply message before, do not receive Rc_Ack (be above-mentioned second kind unusual), send message and finish incident Runout and enter the FAI state thereby produce.Therefore, in the TFO state machine form in TC, replenish action IT.

When 3. situation has been described the TFO state machine among the TC and has been in the KON state, TC is in receiving from second scheduled time after the answer message of opposite end TC, do not receive TFO frame (be above-mentioned the third unusual), thereby produce timer expiry incident Timeout and enter the FAI state, therefore, in the TFO state machine form in TC, replenish action IT.

Need to prove, above-mentioned situation 1. and situation 2. be when between MS, using the AMR algorithm,, to cause the TFO state machine among the TC to enter FAI because BTS adjusts overlong time to the TC recovery rate, and TFO to set up processing after the failure imperfect and propose.Situation 3. be since between an end TC and the other end TC TFO state inconsistent, an end TC crosses slow and causes that an other end TC is overtime, thus the TFO state machine among this other end TC enters FAI, and TFO to set up processing after the failure imperfect and propose.At above-mentioned three kinds of situations, the present invention is by carrying out IT, and particularly by sending TFO_OFF to the base station, the state of the TFO state machine in can TC and the state of BTS state machine are corresponding consistent, and the TFO state machine is corresponding consistent with the TC behavior, and then realizes that TFO sets up failure complete process afterwards.

In addition, plant unusually at above-mentioned (3), if TC receives the TFO frame in this second scheduled time, and this TFO frame is more than second predetermined quantity, and then TC will carry out the operation of TFO frame, and wherein, this TFO frame operation is used for indicating TC to set up TFO.Like this, receive at TC under the situation of this TFO frame (being that the condition that TFO sets up is set up), can guarantee that TFO sets up successfully.

In addition, can be applied in the base station sub-system, thereby realize that TFO in the base station sub-system sets up the complete process after the failure according to the TC of the embodiment of the invention.

Further describe the preferred embodiments of the present invention below.

Need to prove, use AMR algorithm, negotiated match between the TC among the following embodiment between the MS.Simultaneously, the state of supposing the TFO state machine among the TC is TFOState, and hypothesis TFO foundation is masked as AcceptTFO.

Embodiment 1

Present embodiment 1 is WRC at TFOState.

Local TC, starts timer T1=1s then, and sends some answer message to opposite end TC, at this moment AcceptTFO=IT to base station transmission rate efficient adjustment request by TFO_SOON notice configuration frame.

Fig. 2 is according to the flow chart of the abnormality eliminating method of the no sign indicating number type transducer cascade operation of the embodiment of the invention 1, comprises that following step S202 is to step S212.

Step S202 replys Rc_ACK if local TC receives from the speed adjustment of base station, then withdraws from this flow process, handles according to the regulation flow process of agreement; Otherwise enter step S204.

Step S204 if the some answer message that send to opposite end TC send finishes, and then produces Runout incident (be in the above-mentioned table 5 situation 2.), and enters step S210.

Step S206 if timer T1 is overtime, then produces Timeout incident (be in the above-mentioned table 5 situation 1.), and enters step S210.

Need to prove, in step S204 and step S206, if base station limits adjustment speed, it is slow excessively to make the base station carry out the speed adjustment, the Rc_Ack that then may cause the base station to reply is slower, produces above-mentioned Runout incident or Timeout incident.In addition, the order of above-mentioned steps S204 and step S206 is tradable.Promptly as long as produce Runout incident or Timeout incident, then enter step S210 and step S212, execution TFO sets up the processing after the failure.

Step S208 is if the A mouth is received TFO frame, AcceptTFO=AT.Otherwise, enter step S202.

Need to prove that if opposite end TC has finished the speed adjustment, and send the TFO frame, at this moment, local TC will produce behavior AT when receiving this TFO frame, promptly accept the TFO frame of opposite end.

But if local TC can't finish the speed adjustment, the TFO state machine among the local TC will enter FAI, also just can not send the TFO frame to the opposite end.If opposite end TC can not receive the TFO frame always, then can stop the transmission of TFO frame.

In agreement, after the TFO state machine in local TC entered FAI, local TC but maintained the state of AT always, and this is not only meaningless, also causes some abnormal operations easily.Therefore, should increase the IT action, ignore the TFO frame of A mouth, send TFO_OFF by local TC to BTS, the TFO state machine of the local TC of notice BTS changes, and the TFO state of BTS and local TC are consistent.

In addition, if local TC has received the TFO frame, it is the transmission that opposite end TC does not also stop the TFO frame, after then the TFO state machine in local TC enters FAI, local TC also can wait for a period of time, by the time opposite end TC has stopped the transmission of TFO frame, local TC produces corresponding frame losing incident, and this frame losing incident can be used as judges that opposite end TC stops the sign that the TFO frame sends.

In agreement, this frame losing incident produces without any action, and according to the abnormality eliminating method that the no sign indicating number type transducer cascade of the embodiment of the invention is operated, if with this frame losing incident as a token of, increases the IT action, and has sent TFO_OFF to BTS.

Step S210, speed adjustment restriction is decontroled in the formation of state machine flush message, and TFOState enters FAI.Enter step S212.

Step S212 puts AcceptTFO=IT, sends TFO_OFF configuration frame to BTS.

Need to prove that this TFO state machine increases behavior IT, and send TFO_OFF configuration frame to BTS.

Wherein, when the WRC state, owing to sending and finish or timer has replenished action IT when then entering FAI for replying message, and this action can produce at once, also can produce according to the current state delay of TFO frame of whether receiving.This moment, step S212 handled as follows: send TFO_OFF configuration frame to BTS.When the A mouth is lost the TFO frame, when producing the frame losing incident, put AcceptTFO=IT.

Embodiment 2

Present embodiment 2 is KON at TFOState.

Suppose that n is that TC detects the TFO frame number that the A mouth is received, and hypothesis is when n＜5, the TFO state machine will produce TFO frame incident.

Start timer T2=2s, sends an ACK message, send a TRANS message then, begin to send the TFO frame again, AcceptTFO=IT at this moment, n=0 or AcceptTFO=AT, n＞0 to opposite end TC to opposite end TC.

Fig. 3 is according to the flow chart of the abnormality eliminating method of the no sign indicating number type transducer cascade operation of the embodiment of the invention 2, comprises that following step S302 is to step S316.

Step S302, if AcceptTFO=IT, n=0 then enters step S306.Otherwise, enter step S304.

Step S304, if AcceptTFO=AT, n＞5 then enter step S310.Otherwise, withdraw from this flow process, handle according to the state machine flow process of agreement.

Step S306 if the A mouth is received the TFO frame, produces TFO frame incident, then withdraws from this flow process, handles according to the state machine flow process of agreement, otherwise enters step S308.

Step S308 if timer T2 is overtime, produces the Timeout incident, then enters step S314, otherwise gets back to step S306.

Step S310 if the A mouth is received the TFO frame, then replenishes and produces TFO frame incident, withdraws from this flow process then, handles according to the state machine flow process of agreement, otherwise enters step S312.

According to embodiments of the invention, replenish the TFO frame incident that produces, be because when local TC owing to the reason of speed adjustment when the WRC state delay is longer, opposite end TC may finish the speed adjustment already, begin to send the TFO frame, therefore local TC has just produced TFO frame incident at the WRC state, and the behavior of generation AT, begins to accept the TFO frame of opposite end.TFO frame incident only produces in 5 TFO frames receiving at first, if TFO frame number n＞5 of receiving, TC then can not produce TFO frame incident again.That is to say that working as local BTS replys Rc_Ack to TC, when TC leaves the WRC state and enters KON, if local TFO frame number n＞5 of receiving the opposite end, do not produce TFO frame incident, state machine will be parked in the KON state always, cannot enter next state, and T2 is overtime up to timer, perhaps far-end can not receive the TFO frame and fails and stops the transmission of TFO frame, and this all can cause TFO to fail under the condition that can set up.At this moment, local TC is in the KON state and can detects really and received the TFO frame, does not but cause the state machine running to be failed because produces corresponding state machine incident, so, TC should increase the generation of TFO frame incident in this case, makes state machine leave KON immediately, enters TFO and sets up state.

Simultaneously, by the additional TFO frame incident that produces, rather than, be that the value of n is imponderable because in this process with the numerical limitations n increase that TFO frame incident produces.Obtain very greatly at n, and this locality only can increase the expense of state machine when being in the WRC state always and also not entering KON in vain; If this locality does not enter KON in the failure of WRC state, n obtains the effect that also can not play practical function more greatly.So way when state machine enters the KON state, is judged exactly preferably,, then replenish the TFO frame incident that produces if n has surpassed predetermined thresholding.Like this, can avoid TFO under the condition that can set up, to set up failure.

Step S312 if timer T2 is overtime, produces the Timeout incident, then enters step S314, otherwise gets back to step S306.

Need to prove that above-mentioned local TC is in the KON state, and, may have following two kinds of possible situations less than the TFO frame that receives in the time at T2 from opposite end TC:

The one, opposite end TC does not send the TFO frame to local TC.

The 2nd, though opposite end TC has sent the TFO frame to local TC, but local TC sends the time of TFO frame and is later than opposite end TC, thereby cause opposite end TC to be in the KON state and never receive TFO frame from local TC, opposite end TC enters the FAI state after overtime then, finally causes opposite end TC to stop to send the TFO frame to local TC.

Under first kind of situation, if the opposite end does not send the TFO frame, local TC still is in the IT state, but has sent TFO_SOON configuration frame to the base station, thereby BTS is in the TFO_Maybe state.In method provided by the invention, increase behavior IT this moment, mainly is to notify the base station in order to initiate TFO_OFF, keeps the TFO state consistency of base station and TC.

Under second kind of situation, the opposite end sent the TFO frame to local, and so local TC has been in the AT state, accepts the TFO frame of A mouth, and had sent TFO_ON configuration frame to the base station, thereby BTS is in the TFO_YES state.In method provided by the invention, increase behavior IT this moment, makes local TC enter the IT state, ignores the TFO frame of A mouth, sends TFO_OFF simultaneously and notify the base station, keeps the TFO state consistency of base station and TC.

Step S314, speed adjustment restriction is decontroled in the formation of state machine flush message, stops to send the TFO frame, sends a NORMAIL message to the opposite end, and TFOState enters FAI.Enter step S316.

Step S316 puts AcceptTFO=IT, sends TFO_OFF configuration frame to BTS.

Need to prove that state machine increases the IT behavior, and send TFO_OFF to BTS.

According to the foregoing description, a kind of yard abnormality eliminating method of type transducer cascade operation that do not have is provided, adopt TC to set up TFO, and when this TC detects TFO IT takes place to carry out when unusual, solved in the implementation procedure of the TFO state machine among the TC, the state correspondence of the state of TFO state machine and BTS state machine is inconsistent, and TFO state machine and the corresponding inconsistent problem of TC behavior, thereby has realized that TFO sets up failure complete process afterwards.Promptly the abnormality eliminating method of operating according to the no sign indicating number type transducer cascade of the embodiment of the invention can make TC when unusual failure enters FAI, completeization of state of TFO, the TFO state of base station and TC also is consistent, thereby evades falling the mistake that abnormal operation causes.

According to embodiments of the invention, also provide a kind of TC.This TC can be used to realize the abnormality eliminating method that does not have sign indicating number type transducer cascade operation of the present invention.Fig. 4 is the structured flowchart according to the TC of the embodiment of the invention, and this TC comprises: set up module 42, detection module 44 and IT module 46, wherein, this IT module 46 comprises: send submodule 460, below said structure is described in detail.

Set up module 42, be used to set up TFO; Detection module 44 is connected to and sets up module 42, is used to detect the TFO that sets up module 42 foundation and takes place unusual; IT module 46 is connected to detection module 44, is used for detecting TFO at detection module 44 TFO takes place to ignore when unusual; Send submodule 460, be connected to detection module 44, be used for according to detection module 44 detected unusually to base station transmission TFO_OFF notification message.

Pass through above-mentioned steps, the abnormality eliminating method of operating according to the no sign indicating number type transducer cascade of the embodiment of the invention can solve in the implementation procedure of the TFO state machine among the TC, the state correspondence of the state of TFO state machine and BTS state machine is inconsistent, and TFO state machine and the corresponding inconsistent problem of TC behavior, and realize that TFO sets up failure complete process afterwards.

Fig. 5 is the preferred structure block diagram according to the TC of the embodiment of the invention, and this is set up module 42 and comprises: first sends submodule 420, the second sends submodule 422, the first reception submodules 424, the second reception submodules 426, the three reception submodules 428.This detection module 44 comprises: first detection sub-module, 440, the second detection sub-module, 442, the three detection sub-module 444.This TC also comprises TFO frame operational module 48.Below said structure is described in detail.

This is set up module 42 and comprises: first sends submodule 420, is used for to base station transmission rate adjustment request; Second sends submodule 422, is used for sending to opposite end TC the answer message of first predetermined quantity; First receives submodule 424, is used to receive the Rc_Ack from the base station; Second receives submodule 426, is used to receive the answer message from opposite end TC; The 3rd receives submodule 428, is used to receive the TFO frame from opposite end TC, sets up TFO to finish.

This detection module 44 comprises: first detection sub-module 440, and be connected to first and receive submodule 424, be used to detect in first scheduled time after the transmission rate adjustment request of base station, first receives submodule 424 does not receive Rc_Ack; Second detection sub-module 442 is connected to first and receives submodule 424, is used to detect and finishes before opposite end TC sends the answer message of first predetermined quantity, and first receives submodule 424 does not receive Rc_Ack; The 3rd detection sub-module 444 is connected to the 3rd and receives submodule 428, is used to detect in receiving from second scheduled time after the answer message of opposite end TC, and the 3rd receives submodule 428 does not receive the TFO frame.

TFO frame operational module 48 is connected to the 3rd and receives submodule 428, be used in second scheduled time the 3rd and receive submodule 428 and receive the TFO frame, and this TFO frame is set up TFO during more than second predetermined quantity.

Like this, by TFO_OFF is sent to the base station, can keep the state of the state of the TFO state machine among the TC and BTS state machine corresponding consistent.In addition, local TC can be changed to IT with the mark of ignoring the TFO frame among the local TC when carrying out IT, thereby makes the TFO state machine corresponding consistent with the TC behavior.In addition, carry out the operation of TFO frame, can guarantee to receive under the situation of this TFO frame (being that the condition that TFO sets up is set up) at TC, TFO sets up successfully.

In sum, according to the abovementioned embodiments of the present invention, a kind of do not have yard abnormality eliminating method of type transducer cascade operation and sign indicating number type transducer are provided.Adopt TC to set up TFO, and when this TC detects TFO IT takes place to carry out when unusual, solved in the implementation procedure of the TFO state machine among the TC, the state correspondence of the state of TFO state machine and BTS state machine is inconsistent, and TFO state machine and the corresponding inconsistent problem of TC behavior, thereby realized that TFO sets up failure complete process afterwards.In addition, can also avoid TFO under the condition that can set up, to set up failure.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. one kind is not had yard abnormality eliminating method of type transducer cascade operation, it is characterized in that, comprising:

Sign indicating number type transducer TC sets up tandem free cascade operation TFO, and wherein, the sign indicating number type that described TFO is used to reduce between a plurality of travelling carriages transforms cascade operation;

Described TC detects described TFO and takes place unusual;

Described TC ignores tandem free cascade operation IT, and wherein said IT comprises that described TC sends TFO to the base station and closes notification message.

2. the abnormality eliminating method that does not have sign indicating number type transducer cascade operation according to claim 1 is characterized in that described TC sets up described TFO and comprises:

Described TC is to the transmission rate adjustment request of described base station;

Described TC sends the answer message of first predetermined quantity to opposite end TC;

Described TC receives the Rc_Ack from described base station, and wherein, described Rc_Ack is used to reply described rate adjustment request;

Described TC receives the answer message from described opposite end TC;

Described TC receives the TFO frame from described opposite end TC, sets up described TFO to finish.

3. an abnormality eliminating method that does not have sign indicating number type transducer cascade operation according to claim 2 is characterized in that, describedly comprises unusually:

Described TC does not receive described Rc_Ack in first scheduled time after described base station sends described rate adjustment request.

4. an abnormality eliminating method that does not have sign indicating number type transducer cascade operation according to claim 2 is characterized in that, describedly comprises unusually:

Described TC does not receive described Rc_Ack finishing before opposite end TC sends the answer message of first predetermined quantity.

5. an abnormality eliminating method that does not have sign indicating number type transducer cascade operation according to claim 2 is characterized in that, describedly comprises unusually:

Described TC does not receive described TFO frame in receiving from second scheduled time after the answer message of described opposite end TC.

6. the abnormality eliminating method that does not have sign indicating number type transducer cascade operation according to claim 5, it is characterized in that, if described TC is in described second scheduled time, receive described TFO frame, and described TFO frame is more than second predetermined quantity, then described TC carries out the operation of TFO frame, and wherein, described TFO frame operation is used for indicating described TC to set up described TFO.

7. a TC is characterized in that, comprising:

Set up module, be used to set up TFO;

Detection module is used to detect described TFO and takes place unusual;

The IT module is used to ignore TFO;

Described IT module comprises:

Send submodule, be used for sending TFO and close notification message to the base station.

8. TC according to claim 7 is characterized in that, the described module of setting up comprises:

First sends submodule, is used for to the transmission rate adjustment request of described base station;

Second sends submodule, is used for sending to opposite end TC the answer message of first predetermined quantity;

First receives submodule, is used to receive the Rc_Ack from described base station;

Second receives submodule, is used to receive the answer message from described opposite end TC;

The 3rd receives submodule, is used to receive the TFO frame from described opposite end TC, sets up described TFO to finish.

9. TC according to claim 8 is characterized in that, described detection module comprises:

First detection sub-module is used to detect in first scheduled time after described base station sends described rate adjustment request, does not receive described Rc_Ack;

Second detection sub-module is used to detect finishing before opposite end TC sends the answer message of first predetermined quantity, does not receive described Rc_Ack;

The 3rd detection sub-module is used to detect in receiving from second scheduled time after the answer message of described opposite end TC, does not receive described TFO frame.

10. TC according to claim 9 is characterized in that, also comprises:

TFO frame operational module was used for receiving described TFO frame in described second scheduled time, and described TFO frame is set up described TFO during more than second predetermined quantity.

11., it is characterized in that described TC is applied in the base station sub-system according to each described TC in the claim 7 to 10.