CN102843731B - TFO termination and system applied to wireless communication system - Google Patents
TFO termination and system applied to wireless communication system Download PDFInfo
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- CN102843731B CN102843731B CN201110169667.0A CN201110169667A CN102843731B CN 102843731 B CN102843731 B CN 102843731B CN 201110169667 A CN201110169667 A CN 201110169667A CN 102843731 B CN102843731 B CN 102843731B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
Abstract
The invention discloses a kind of TFO termination and system applied to wireless communication system, it includes：Local TRAU is being received after TFO goes to enable message, and its state machine produces behavior CR, is sent TFO to opposite end TRAU/TC and is gone to enable and notifies；Opposite end TRAU/TC goes to enable and notified according to the TFO, stops the transmission of TFO frames, and its state machine enters MON states.The present invention can avoid in the prior art distal end TRAU/TC constantly repeat to send TFO message and attempt to consult again, cause the waste of opposite end TRAU/TC resources, opposite end TRAU/TC can also be overcome to attempt to consult again due to constantly sending TFO message simultaneously, so that the pcm stream for constantly taking A mouthfuls carries out TFO message, so that the problem of being impacted to voice quality, so that voice quality can be improved to a certain extent.
Description
Technical field
Wireless communication system especially GSM systems are applied to the present invention relates to wireless communication technique field, more particularly to one kind
TFO (exempting from secondary coding, the Tandem Free Operation) terminating methods and system for TRAU modules of uniting.
Background technology
In traditional GSM, mobile station MS (Mobile Station) is to other end MS calling whole
The cascade operation processing of encoding and decoding speech twice is there is on transmission link, this reduces the voice matter of transmission to a certain extent
Amount, in order to solve this problem, is currently suggested a kind of method for avoiding encoding and decoding cascade operation, that is, TFO.
(code is exchanged and Rate Adapter Unit the main TRAU in 2G wireless communication systems of TFO, Transcoder and
Rate Adapter Unit) TC (transcoder, Transcoder) module of module or 3G wireless communication systems realizes that it is with TC/
The A mouths pcm stream transmitted between TRAU is carrier, and call ends MS encoding and decoding algorithm is realized by way of inserting in-band signaling
Consult, be inserted into voice messaging in pcm stream in the form of TFO frames when consensus, parsed by opposite end and transparent transmission
To MS, voice is set to reduce the operation of an encoding and decoding during transmission, so that speech quality is improved.
For implementing for TFO, the series of 3GPP agreements 28.062 is described later in detail, and TRAU/TC modules are in activation TFO
After function, TFO negotiations are carried out by the interaction of TFO message, then TFO is set up under compatible algorithm pattern and starts
The transmission of TFO frames.As shown in table 1, the TFO state machines of some TFO states, behavior and event are included defined in the agreement,
Occur by the migration of event triggering state and behavior, so as to realize TFO whole function.
Table 1
According to agreement, TRAU/TC modules are about consistent for TFO flow processing, and the difference of the two is essentially consisted in：
In 2G systems, positioned at BSC (base station controller, Base Station Controller) TRAU and BTS (base station transceivers
Platform, Base Transceiver Station) need to insert TFO configuration parameters in data in user plane band in AMR algorithms
Interaction so that activation, deactivation and speed adjust to TFO functions etc. is controlled；And in 3G systems, positioned at MGW
Its TFO function control of the TC of (WMG, Media Gateway) is by MSC (mobile switching centre, Mobile Switching
Center) handled, it is not necessary to handled by user face data.So in the realization of TFO state machines, TRAU and TC
Module just has some difference to the processing details of TFO events, although the operating flow of state machine is the same, but is moved in state machine
The generation of individual behaviour is different during shifting, specifically refer to table 2, gives in the table in TRAU and TC modules
The different TFO behaviors of definition.
Table 2
According to above-mentioned table 2 as can be seen that TRAU/TC modules can be summarized as two categories below for TFO behavior difference：
The first kind includes Tx_Trau：=TFO_Off, Tx_Trau：=TFO_Soon and Tx_Trau：=TFO_On, they are used for AMR
TRAU notifies TFO state in the way of configuring frame to BTS during (AMR, Adaptive Multi Rate) algorithm,
And in 3G systems, then need not carry out the interaction of this in-band signaling mode；Equations of The Second Kind is during TFO foundation, locally
Deactivate behavior CR during TFO functions.The description as described in CR in agreement, specify that this behavior CR only in 3G systems
TC modules in realize, in other words, namely in the TRAU modules of 2G systems, in the absence of this behavior of CR.
Because behavior CR deactivates event TFO_Disable correlations with TFO, by taking TFO_OPE states as an example, as shown in table 3,
Which show agreement the TFO state machine migration and its behavior definition related when TFO_Disable events are produced.
Table 3
If from upper table 3 as can be seen that produce behavior CR, that is to say will locally send Con_Req configure frame to pair
End, because local TFO goes to enable, the Con_Req configurations frame now sent will carry TFOE=Disable information, opposite end
This configuration frame is received, the Distant_Disable times will be produced；In other words, if locally not producing behavior CR now,
Distal end would not receive the Con_Req configuration frames locally sent, so that corresponding Distant_Disable things would not be produced
Part, therefore, when locally removing to enable TFO, if produce the event generation that CR behaviors directly affects distal end TFO state machines, from
And will further have influence on the TFO state transitions of opposite end.
As depicted in figs. 1 and 2, TC TFO state transitions when described Fig. 1 gives TFO_Disable, described Fig. 2 is provided
TRAU TFO state transitions during TFO_Disable.
Reference picture 1, local to enter TT states during local TFO_Disable, the behavior CR of generation produces distal end
Distant_Disable events, so that distal end has obtained the notice that local TFO goes to enable, thus stop the transmission of TFO frames,
Into MON states；Locally after TFO synchronizations are lost, into NAC states.Two ends no longer produce and appointed in NAC states and MON states
What is acted, and A mouthfuls carry out common PCM interactions.
And in fig. 2, locally stopping TFO frames when TFO_Disable enters TT states sends, but due to not producing behavior
CR, therefore be configured without frame and be sent to distal end, local TFO enabled states change distally can not be definitely learnt, only by passively
Detect TFO synchronization loss to carry out stopping the processing that TFO frames are sent, assisted again while attempting TFO to local transmission TFO_Req message
Business, into COR states；Now, NAC states are locally entered after loss is synchronous with the TFO of distal end, will not respond what distal end was sent
TFO message, so that distal end eventually enters into PER states, and periodically initiation TFO_Req_L message trial TFO consults again.
As can be seen here, TRAU and TC modules cause opposite end to enter in local TFO_Disable due to whether producing the difference of CR behaviors
Different TFO states.Comparatively speaking, TC send configurations frame notifies opposite end TFO to go the CR behaviors enabled in 3G systems,
The TFO two ends of negotiation are made finally all to enter a stable state, this way is more reasonable；But in 2G systems, in local TFO_
During Disable, PER states are distally eventually entered into, this can make distal end, and ceaselessly periodically transmission TFO message is attempted to consult again,
This behavior cannot get local response, so as to cause the waste of opposite end TRAU resources, disappear simultaneously because constantly sending TFO
Breath is attempted to consult again, so that the pcm stream for constantly taking A mouthfuls carries out the transmission of TFO message, therefore voice quality also result in
Certain influence.
The content of the invention
It is an object of the invention to provide a kind of TFO termination and system applied to wireless communication system, to solve
When TRAU modules TFO is terminated, distally notified because can not receive so that the problem of TFO states can not move to corresponding stable state.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of TFO termination applied to wireless communication system, including：
A, local TRAU receive TFO go enable message after, its state machine produce behavior CR, to opposite end TRAU/TC send
TFO goes to enable and notified；
B, opposite end TRAU/TC go to enable and notified according to the TFO, stop the transmission of TFO frames, and its state machine enters MON shapes
State.
Preferably, when using AMR algorithms, the step A includes：
The Con_Req configuration frames that A1, local BTS send carrying TFO_Disable information notify local TRAU to go enable
TFO；
Con_Req described in A2, local TRAU transparent transmissions configures frame to opposite end TRAU/TC.
Preferably, when using non-AMR algorithms, the step A includes：
A11, local TRAU receive the TFO_Disable that local BSC is sent, and build carrying TFO_Disable information
Con_Req configures frame；
A12, local TRAU send the Con_Req and are configured to opposite end TRAU/TC.
Preferably, after the step A1 is performed, local TRAU notifies local BTS to decontrol speed adjust limitation.
Preferably, after the step A2 is performed, local TRAU stops sending TFO frames.
Preferably, the step B includes：
B1, opposite end TRAU/TC receive Con_Req configuration frames, and respond Con_Ack configuration frames to local TRAU, afterwards, stop
Only TFO frames send and receive；
B2, opposite end TRAU/TC notify opposite end BTS to decontrol speed adjust limitation, and its state machine enters MON states.
It is further preferable that the step B also includes：
B3, local TRAU receive the Con_Ack configurations frame；
B4, A mouthfuls of TFO Frame Alignment Loss are detected more than 2 frames as local TRAU, and local TFO is when going to enable, locally
TRAU notifies the local TFO of local BTS to go enable, and local TRAU state machines enter NAC states.
A kind of wireless telecommunication system, including local TRAU and opposite end TRAU/TC, wherein,
Local TRAU, to receive after TFO goes to enable message, its state machine produces behavior CR, is sent out to opposite end TRAU/TC
TFO is sent to go to enable notice；
Opposite end TRAU/TC, goes to enable notice according to the TFO, stops the transmission of TFO frames, its state machine enters MON shapes
State.
Preferably, in addition to local BTS, the local BTS sends the Con_Req configurations for carrying TFO_Disable information
Frame notifies local TRAU to go to enable TFO, and the Con_Req as described in local TRAU transparent transmissions configures frame to opposite end TRAU/TC.
Preferably, in addition to local BSC, local BSC sends TFO_Disable to local TRAU, and local TRAU builds and taken
Con_Req configuration frames with TFO_Disable information are simultaneously sent to opposite end TRAU/TC.
As can be seen from the above technical solutions, the present invention is because local TRAU is after TFO goes enable, and state machine produces behavior
CR, will make opposite end TRAU/TC receive the notice that local TFO goes to enable, so that quick response, stops the transmission of TFO frames, terminates
TFO, makes its state machine enter MON states, subsequently no longer initiates TFO message, compared with prior art, can avoid opposite end
TRAU/TC, which constantly repeats to send TFO message, to be attempted to consult again, causes the waste of opposite end TRAU/TC resources, at the same can with gram
Take opposite end TRAU/TC to attempt to consult again due to constantly sending TFO message, so that the pcm stream for constantly taking A mouthfuls carries out TFO
Message, so that the problem of being impacted to voice quality, so that voice quality can be improved to a certain extent.
Brief description of the drawings
Fig. 1 is state transition flow charts of the TC in TFO_Disable；
Fig. 2 is state transition flow charts of the TRAU in TFO_Disable；
Fig. 3 is the flow chart of the TFO termination provided in an embodiment of the present invention applied to wireless communication system；
Fig. 4 is the illustrative view of functional configuration of wireless communication system provided in an embodiment of the present invention；
Fig. 5 is state transition flow charts of the TRAU provided in an embodiment of the present invention in TFO_Disable.
The realization, functional characteristics and excellent effect of the object of the invention, below in conjunction with specific embodiment and accompanying drawing do into
The explanation of one step.
Embodiment
Technical scheme of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that this
The technical staff in field can be better understood from the present invention and can be practiced, but illustrated embodiment is not as the limit to the present invention
It is fixed.
A kind of TFO termination applied to wireless communication system provided according to the present invention, it includes：
A, local TRAU receive TFO go enable message after, its state machine produce behavior CR, to opposite end TRAU/TC send
TFO goes to enable and notified；
B, opposite end TRAU/TC go to enable and notified according to the TFO, stop the transmission of TFO frames, and its state machine enters MON shapes
State.
For above-mentioned steps A
In specific implementation process, when the MS at two ends uses AMR algorithms, the step A includes following detailed step：
The Con_Req configuration frames that A1, local BTS send carrying TFO_Disable information notify local TRAU to go enable
TFO；Preferably, after the step A1 is performed, local TRAU notifies local BTS to decontrol speed adjust limitation.
Con_Req described in A2, local TRAU transparent transmissions configures frame to opposite end TRAU/TC.
Similarly, when the MS at two ends uses non-AMR algorithms, the step A includes：
A11, local TRAU receive the TFO_Disable that local BSC is sent, and build carrying TFO_Disable information
Con_Req configures frame；
A12, local TRAU send the Con_Req and are configured to opposite end TRAU/TC.
Preferably, after the step A2 is performed, local TRAU stops sending TFO frames.
Preferably, the step B includes：
B1, opposite end TRAU/TC receive Con_Req configuration frames, and respond Con_Ack configuration frames to local TRAU, afterwards, stop
Only TFO frames send and receive；
B2, opposite end TRAU/TC notify opposite end BTS to decontrol speed adjust limitation, and its state machine enters MON states.
For above-mentioned steps B
It is further preferable that the step B also includes：
B3, local TRAU receive the Con_Ack configurations frame；
B4, A mouthfuls of TFO Frame Alignment Loss are detected more than 2 frames as local TRAU, and local TFO is when going to enable, locally
TRAU notifies the local TFO of local BTS to go enable, and local TRAU state machines enter NAC states.
Correspondingly, a kind of wireless telecommunication system provided according to the present invention, it includes local TRAU and opposite end TRAU/
TC, wherein,
Local TRAU, to receive after TFO goes to enable message, its state machine produces behavior CR, is sent out to opposite end TRAU/TC
TFO is sent to go to enable notice；
Opposite end TRAU/TC, goes to enable notice according to the TFO, stops the transmission of TFO frames, its state machine enters MON shapes
State.
In preferred embodiment, the wireless telecommunication system also includes local BTS, and the local BTS, which is sent, carries TFO_
The Con_Req configuration frames of Disable information notify local TRAU to go to enable TFO, and the Con_Req as described in local TRAU transparent transmissions matches somebody with somebody
Frame is put to opposite end TRAU/TC.
In addition, in addition to local BSC, it is mainly used for when local BTS can not send carrying TFO_Disable letters
When the Con_Req of breath configures frame to local TRAU, local BSC sends TFO_Disable to local TRAU, and local TRAU builds and taken
Con_Req configuration frames with TFO_Disable information are simultaneously sent to opposite end TRAU/TC.
Below by taking AMR algorithms as an example, in the prior art, after state machine starts, when local TRAU is assisted with opposite end TC/TRAU
During business's success, both sides enter OPE states, and the TFO frames carried by A mouthfuls of pcm streams are interacted.As the TFO at local TRAU ends
When going to enable, as shown in Figure 1, BTS sends Con_Req configuration frames to local TRAU, carries TFO_Disable information, locally
TRAU receives this configuration frame, will produce TFO_Disable events, so that its TFO enters TFO_TT states, now basis
The protocol state machine behavior that table 3 above is described, local TRAU will notify local BTS speed controls to be revised as in local ACS
Carried out in set, stop sending TFO frames, send TFO_Normal message to opposite end, while setting T1=1s timer.
Stop sending TFO frames due to local, opposite end TC/TRAU will detect TFO Frame Alignment Loss, and can then send to local TRAU
TFO_SYL message, and also corresponding stopping sends TFO frames, into SOS state.Local TRAU receives opposite end TC/TRAU TFO_
After SYL message, TFO_Off will be sent and configure frame to local BTS, TFO_Normal message is sent to opposite end TC/TRAU, enter simultaneously
Enter NAC states, complete local TFO termination.
At the same time, opposite end TRAU/TC will decontrol speed control in distal end ACS collection after TFO_SYL message is sent
In closing, notify BTS or MSC TFO to terminate, into COR states, then will initiate TFO_Req message and attempt with local TRAU's
TFO is reconnected.Local TRAU no longer responds opposite end TRAU/TC TFO message after TFO terminations, and such opposite end TRAU/TC exists
After TFO message is sent, i.e., into PER states, and TFO_Req_L message is sent, while setting T5=5s timing
Device, each timer expiry just resends a TFO_Req_L message, then resets timer.
So, opposite end TRAU/TC TFO will eventually stop at PER states, and a TFO_Req_L message, A mouthfuls are sent per 5s
Pcm stream also will be embedded into a TFO message per 5s, go round and begin again.
In the method that provides of the present invention, state machine needs act of revision CR so that behavior CR no longer only with 3G system phases
Close so that the TRAU modules of 2G systems can also produce behavior CR, and form is realized with reference to the TFO state machines that agreement is provided, realize
When local TRAU TFO goes to enable, local TRAU can also be to opposite end TRAU/TC send configuration frames.
In view of it is described above, if local TRAU does not produce behavior CR, when local TRAU TFO goes to enable, opposite end
TRAU/TC will enter state PER, and periodically initiation TFO_Req_L message trial TFO consults again, and this is for opposite end TRAU/
It is a waste for TC resources, and constantly insertion TFO message, into pcm stream, can also influence voice quality.
In method provided in an embodiment of the present invention, local TRAU is after TFO goes enable, and state machine produces behavior CR, will
The TFO for making opposite end TRAU/TC receive local TRAU goes to enable and notified, so that quick response, stops the transmission of TFO frames, terminates
TFO, its state machine enters MON states, subsequently no longer initiates TFO message.
Method provided in an embodiment of the present invention can make local TRAU go to enable in TFO, terminate TFO and cause its state machine
During into NAC states, local TFO is removed to enable message informing to opposite end TRAU/TC, so that opposite end TRAU/TC can quickly ring
TFO and should be stopped, and enter MON states.
Why require to produce behavior CR in TC modules in current agreement, and TRAU modules need not produce behavior CR,
It is due to that in 3G systems, A mouthfuls of TFO configuration frames are all TC module constructions, when MSC notifies that TC removes to enable TFO, behavior CR
So that TC modules configure frame carrying TFO_Disable information by building Con_Req, opposite end TRAU/TC TFO is notified to go to enable
Message.
And in embodiments of the present invention, in 2G systems, during using AMR algorithms, local BTS carries TFO_ by sending
The Con_Req configuration frames of Disable information notify TRAU modules to go to enable TFO, and TRAU only needs to transparent transmission Con_Req configuration frames
Opposite end TRAU/TC TFO can be notified to go to enable.But protocol state machine is when TFO_Disable events are produced, continue to return
Text generates behavior DT referring to table 3, that is, stops sending TFO frames, if not having now behavior CR, local TRAU to stop transmission TFO
Frame, Con_Req configuration frame can not just be transparent to opposite end TRAU/TC, cause opposite end TRAU/TC can not receive TFO go enable
Notify.On the other hand, during non-AMR algorithms, local BTS not necessarily notifies local mono- TFO_Disable of TRAU by configuring frame,
But TFO_Disable to local TRAU is sent by local BSC, in this case, it is necessary to which local TRAU voluntarily builds carrying
The Con_Req configuration frames of TFO_Disable information just can know that local TFO is gone to opposite end TRAU/TC, opposite end TRAU/TC
Activation, so as to carry out more rational state transition.
Below, a specific example is lifted to illustrate the present invention.
If local TRAU TFO state machine state is TFOState, local TRAU is Loc_TRAU, opposite end TRAU/TC
For Dis_TRAU, TFO is set up after negotiation, TFOState enters OPE states, when two ends MS uses AMR algorithms, as shown in figure 3,
Loc_TRAU receives the Con_Req configuration frames that local BTS is sent, TFOE=0, represent TFO_Disable, Loc_TRAU enter with
Lower step：
Step 1, local TRAU notify local BTS to decontrol speed adjust limitation, and then transparent transmission Con_Req configuration frames stop
TFO frames are sent, TFOState enters TFO_TT states；
Step 2, opposite end TRAU/TC, i.e. Dis_TRAU receive A mouthfuls of Con_Req configuration frames, and TFOE=0 responds Con_Ack
Frame is configured, then stops the reception and transmission of TFO frames, notifies opposite end BTS to decontrol speed adjust limitation and TFO_OFF,
TFOState enters MON states；
Step 3, Loc_TRAU receive Con_Ack configuration frames, and TFOState is still TFO_TT states；
Step 4, Loc_TRAU detect A mouthfuls of TFO Frame Alignment Loss and go to enable more than 2 frames, and local TFO；
Step 5, Loc_TRAU notify its TFO_OFF of local BTS, TFOState to enter NAC states.
In addition, if MS uses non-AMR algorithms, if BTS does not support to interact with TRAU configuration frame, but by
BSC notifies TRAU module TFO_Disable, then in above-mentioned steps 1, and local TRAU, which is built, carries TFO_Disable information
Con_Req configures frame, and sends to opposite end TRAU/TC, then stops sending TFO frames, TFOState enters TFO_TT states, it
Afterwards, processing below is continued into step 2.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (9)
1. a kind of TFO termination applied to wireless communication system, it is characterised in that including：
A, local code exchange and Rate Adapter Unit TRAU receive exempt from secondary coding TFO go enable message after, its state machine production
Raw behavior configuring request CR, is exchanged to opposite end code and Rate Adapter Unit TRAU/ transcoders TC transmissions TFO goes to enable and notified；
When using non-self-adapting multi tate AMR algorithms, the step A includes：
A11, local TRAU receive the TFO_Disable that home base stations controller BSC is sent, and build carrying TFO_Disable
The Con_Req configuration frames of information；
A12, local TRAU send the Con_Req and configure frame to opposite end TRAU/TC；
B, opposite end TRAU/TC go to enable and notified according to the TFO, stop the transmission of TFO frames, and its state machine enters monitoring MON shapes
State.
2. the TFO termination of wireless communication system is applied to as claimed in claim 1, it is characterised in that when using adaptive
When answering multi tate AMR algorithms, the step A includes：
A1, home base stations transceiver station BTS, which are sent, carries the Con_Req configuration frame notices that TFO goes enable TFO_Disable information
Local TRAU goes to enable TFO；
Con_Req described in A2, local TRAU transparent transmissions configures frame to opposite end TRAU/TC.
3. the TFO termination of wireless communication system is applied to as claimed in claim 2, it is characterised in that described performing
After step A1, local TRAU notifies local BTS to decontrol speed adjust limitation.
4. the TFO termination of wireless communication system is applied to as claimed in claim 2, it is characterised in that described performing
After step A2, local TRAU stops sending TFO frames.
5. the TFO termination of wireless communication system is applied to as claimed in claim 1 or 2, it is characterised in that the step
B includes:
B1, opposite end TRAU/TC receive Con_Req configuration frames, and respond Con_Ack configuration frames to local TRAU, afterwards, stop
TFO frames send and receive；
B2, opposite end TRAU/TC notify opposite end BTS to decontrol speed adjust limitation, and its state machine enters MON states.
6. the TFO termination of wireless communication system is applied to as claimed in claim 5, it is characterised in that the step B is also
Including：
B3, local TRAU receive the Con_Ack configurations frame；
B4, A mouthfuls of TFO Frame Alignment Loss are detected more than 2 frames as local TRAU, and local TFO is when going to enable, local TRAU
Its TFO of local BTS is notified to go enable, local TRAU state machines enter un-activation NAC states.
7. a kind of wireless telecommunication system, it is characterised in that including local TRAU and opposite end TRAU/TC, wherein,
Local TRAU, to receive after TFO goes to enable message, its state machine produces behavior CR, is sent to opposite end TRAU/TC
TFO goes to enable and notified, is additionally operable to when using non-AMR algorithms, receive the TFO_Disable that home base stations controller BSC is sent,
And the Con_Req configuration frames for carrying TFO_Disable information are built, send the Con_Req and configure frame to opposite end TRAU/TC；
Opposite end TRAU/TC, goes to enable notice according to the TFO, stops the transmission of TFO frames, its state machine enters MON states.
8. wireless telecommunication system as claimed in claim 7, it is characterised in that when the wireless telecommunication system is using adaptive more
During speed AMR algorithms, in addition to local BTS, the local BTS send the Con_Req configuration frames for carrying TFO_Disable information
Local TRAU is notified to go to enable TFO, and the Con_Req as described in local TRAU transparent transmissions configures frame to opposite end TRAU/TC.
9. wireless telecommunication system as claimed in claim 7, it is characterised in that also including local BSC, local BSC sends TFO_
Disable to local TRAU, local TRAU build the Con_Req configuration frames for carrying TFO_Disable information and sent to opposite end
TRAU/TC。
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| CN201110169667.0A CN102843731B (en) | 2011-06-22 | 2011-06-22 | TFO termination and system applied to wireless communication system |
| PCT/CN2011/079995 WO2012174802A1 (en) | 2011-06-22 | 2011-09-22 | Tfo termination method and system applied in wireless communication system |
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| CN201110169667.0A CN102843731B (en) | 2011-06-22 | 2011-06-22 | TFO termination and system applied to wireless communication system |
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| US20070230467A1 (en) * | 2003-12-09 | 2007-10-04 | Alcatel Wireless, Inc. | Method and System for Packet-Based Tandem Free Operation |
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|---|---|
| WO2012174802A1 (en) | 2012-12-27 |
| CN102843731A (en) | 2012-12-26 |
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