CN1988710B - Method and system for controlling MAC state shifting - Google Patents
Method and system for controlling MAC state shifting Download PDFInfo
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- CN1988710B CN1988710B CN2005101306706A CN200510130670A CN1988710B CN 1988710 B CN1988710 B CN 1988710B CN 2005101306706 A CN2005101306706 A CN 2005101306706A CN 200510130670 A CN200510130670 A CN 200510130670A CN 1988710 B CN1988710 B CN 1988710B
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Abstract
The invention discloses a method for controlling the migration between the MAC active state and MAC static state under the RRC mode of long-term evolutionary 3 G system. In which, it sets a queue buffer occupancy rate measurement module and a MAC state migration control module in the MAC layer of network, and it sets threshold of buffer occupancy rate for the QoS priority queue of the equipment (UE) in the MAC layer, and the threshold includes a high limit and a low limit. When the described UE is in MAC active state, if the queue buffer occupancy rate is not larger than the low limit and sustains the scheduled time, then it triggers the migration from the MAC active state to MAC static state. When the described UE is in MAC static state, if the queue buffer occupancy rate is not larger than the low limit and sustains the scheduled time, then it maintains its status and triggers a longer continuous cycle. When the described UE is in MAC static state, if the queue buffer occupancy rate is not larger than the high limit and sustains the scheduled time, then it triggers the migration from the MAC static state to MAC active state.
Description
Technical field
The present invention relates to the digital mobile communication technical field, particularly MAC (Media Access Control, medium access control) state transition control method under RRC (Radio Resource control) connection mode in the 3G (Third Generation) Moblie long evolving system.
Background technology
In the Rel-6 version of 3GPP (third generation partner program) and the former version, subscriber equipment (UE) can be in four kinds of states according to business characteristic respectively with the different of the transmission channel kinds that is distributed under the RRC connection mode: CELL _ DCH status (CELL_DCH), sub-district _ forward access channel status (CELL_FACH), cell _ paging channel state (CELL_PCH) and UTRAN (universal mobile telecommunications system land radio access web) Acceditation Area _ paging channel state (URA_PCH), its activity reduces successively.Network based corresponding strategy by rrc layer signaling control transmission channel type switching and the migration between four kinds of states, but these operations cause bigger system delay.
3GPP Long Term Evolution (LTE) research project is mainly utilized the shared channel transmitting user data towards the packet domain service, has simplified the RRC state, has reduced delay.Fig. 1 is the RRC state diagram of LTE system.As shown in the figure, after the UE and the UTRAN (E-UTRAN) of evolution set up RRC and are connected, enter active state (RRC ACTIVE) from idle condition (RRCIDLE), wherein, RRC ACTIVE state comprises MAC active state (MAC ACTIVE) and MAC inactive state (MAC DORMANT).The common ground of these two kinds of mac states is that UE has RRC with network E-UTRAN and is connected, and preserves the UE context among the E-UTRAN and knows the sub-district that UE belongs to.Difference is under MAC ACTIVE state, UE continuous monitoring downlink shared transmission channel follow dispatch on the downlink physical control channel, by ascending physical signal control channel feeding back ACK/NACK (ack/nack is replied) and DSCH Downlink Shared Channel quality indication information such as (CQI) and and E-UTRAN between reception/transmission signaling and user data continuously; Under MAC DORMANT state, UE only in discontinuous reception (DRX) mode according to DRX cycle period (DRX cycle length) transmission/reception signaling at interval, when needs reception/transmission user data is scheduled, adjourn MAC ACTIVE state again.The present discussion result of 3GPP LTE is that the switching of two kinds of mac states can be by MAC layer equity signaling or timer control, and still strategy and the algorithm for control also do not have clear and definite.
Summary of the invention
Technical problem to be solved by this invention be propose a kind of in 3G (third generation mobile) LTE system mac state migration control method under the RRC connection mode.
For achieving the above object, the present invention proposes the control method of moving between a kind of MAC active state and MAC inactive state, be used for the 3G (Third Generation) Moblie long evolving system, comprise: step 1 is provided with queue buffer occupancy measurement module and mac state migration control module in the MAC of network side layer; Step 2 is provided with the threshold value of its buffer performance to the service quality priority formation of subscriber equipment in the described MAC layer, comprises high limit and lower bound; Step 3 when described subscriber equipment is in the MAC active state, if its queue buffer occupancy is not higher than described lower bound and continues the scheduled time, then triggers it and moves to the MAC inactive state from the MAC active state; Step 4 when described subscriber equipment is in the MAC inactive state, if its queue buffer occupancy is not higher than described lower bound and continues the scheduled time, then keeps its state and triggers it with longer discontinuous cycle period work; And step 5, when described subscriber equipment is in the MAC inactive state,, then triggers it and move to the MAC active state from the MAC inactive state if the queue buffer occupancy is limit greater than height.
The formation of each the described subscriber equipment in the described MAC layer all is provided with two respectively with described queue buffer occupancy measurement module and listen and state the corresponding example of mac state migration control module here.
Wherein, the example of described queue buffer occupancy measurement module provides a function to obtain the buffer performance of described formation, and whether arrive threshold value according to the buffer performance of described formation and send relative trigger message, comprise that lower bound arrives to trigger message and height and be limited to and reach triggering message.
The example of described mac state migration control module is used to receive the triggering message of the example of described queue buffer occupancy measurement module, or calls described function obtaining the queue buffer occupancy, thus the migration of control mac state.
Here, described step 3 also comprises: step 31, and after receiving that described lower bound arrives triggering message, described mac state migration control module example is provided with first timer, is used to calculate the queue buffer occupancy and remains on the following duration of described lower bound; And step 32, after described first timer was overtime, if the queue buffer occupancy is not higher than described lower bound, then described mac state migration control module example sent MAC layer equity signaling to trigger its MAC inactive state of moving into to described subscriber equipment; Otherwise, keep the current state of described subscriber equipment.
Described step 4 also comprises: step 41, after described subscriber equipment is moved into the MAC inactive state, described mac state migration control module example is provided with second timer, is used to calculate the queue buffer occupancy and remains on the duration that described high limit is following or continue to remain on described lower bound; And step 42, after described second timer is overtime, if the queue buffer occupancy is not higher than described lower bound, described mac state migration control module example sends MAC layer equity signaling to trigger described subscriber equipment with longer discontinuous cycle period work to described subscriber equipment; Otherwise, keep the current state of described subscriber equipment.
In described step 5, described mac state migration control module example is limited to reach and triggers message and judge that described queue buffer occupancy is higher than described high limit by receiving described height, and, stop the timing of first timer and second timer simultaneously by sending MAC layer equity signaling to described subscriber equipment to trigger its MAC active state of moving into.
Wherein, described mac state migration control module example is provided with timer module, described timer module comprises that a plurality of timers are to support multistage discontinuous reception cycle period, thereby reach the purpose of the described subscriber equipment battery saving mode of dynamic control, the rank of wherein said discontinuous reception cycle period is identical with the quantity of described a plurality of timers.For example utilize first/second timer can support the discontinuous reception cycle period of two-stage, can support more multi-level discontinuous reception cycle period by setting up new timer.
In addition, under the MAC inactive state, described mac state migration control module example can during by the indication of ascending physical signal control channel reporting channel quality, send MAC layer equity signaling to it at described subscriber equipment, thereby need not constantly to keep synchronously with described user's discontinuous reception.
For achieving the above object, the invention allows for a kind of system that moves between MAC active state and MAC inactive state that is used to control, be included in the network side MAC layer and be provided with lower module: the QoS priority query formation module of a plurality of subscriber equipmenies, and its buffer performance is provided with lower bound and two threshold values of high limit; Queue buffer occupancy measurement module is used to measure the state of described formation module; And mac state migration control module, be used to control the migration of mac state; Wherein, when described subscriber equipment is in the MAC active state,, then triggers it and move to the MAC inactive state from the MAC active state if its queue buffer occupancy is not higher than described lower bound and continues the scheduled time; When described subscriber equipment is in the MAC inactive state,, then keeps its state and trigger it with longer discontinuous cycle period work if its queue buffer occupancy is not higher than described lower bound and continues the scheduled time; When described subscriber equipment is in the MAC inactive state,, then triggers it and move to the MAC active state from the MAC inactive state if the queue buffer occupancy is limit greater than height.
Simultaneously, example and a described mac state of a corresponding described queue buffer occupancy measurement module are moved the example of control module to each of described formation module respectively.
Mac state migration control method under a kind of RRC connection mode in the 3G LTE system that proposes according to the present invention, can reduce effectively in the legacy system because of the RRC state switches and transmission channel kinds switches caused delay, thereby improve the performance of whole system.
The present invention is described in detail with detailed execution mode below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the RRC view of LTE system;
Fig. 2 is a basic structure schematic diagram of the present invention;
Fig. 3 is a basic flow sheet of the present invention; And
Fig. 4 a is a main program flow chart of the present invention;
Fig. 4 b is an Event_Threshold-Low_In_Active interrupt service routine flow chart of the present invention;
Fig. 4 c is an Event_TIMER1_OUT interrupt service routine flow chart of the present invention;
Fig. 4 d is an Event_TIMER2_OUT interrupt service routine flow chart of the present invention; And
Fig. 4 e is an Event_Threshold-High_In_DORMENT interrupt service routine flow chart of the present invention.
Embodiment
Fig. 2 is a basic structure schematic diagram of the present invention.
As shown in Figure 2, the present invention includes QoS (the Quality of Service that is arranged in the MAC layer, service quality) priority query (Queue) module, and example module more than two: queue buffer occupancy measurement module (Queue Buffer Occupancy Measurement, QBOM) and mac state migration control module (Mac State Transfer Control, MSTC).The respectively corresponding QBOM example of the formation of each UE and a MSTC example.In addition, the buffering area for formation is provided with two buffer performance threshold values, lower bound (Threshold-Low) and high limit (Threshold-High).Wherein, the QBOM example is used for measuring in real time the state of formation, and whether arrives certain default threshold value according to the buffer performance of formation and trigger MSTC and carry out corresponding operation, and the function G et_BO that obtains the queue buffer occupancy is provided simultaneously.And the MSTC example can receive the triggering message of QBOM example or call function Get_BO obtaining the buffer performance of formation, thus the migration of control mac state.
The setting of quene threshold value is relevant with the QoS class of service, and lower bound generally can be made as 0, also can be set to a less value.High limit setting principle is as follows: for real-time conversation class, stream class service, because to delay sensitive, the requirement of guaranteed speed and transmission delay, for example when real time business arrives, if UE is in MAC DORMANT state, general requirement switches to MAC ACTIVE state immediately, thus its high limit need to be provided with very little, can equal or be slightly larger than lower bound; And for non real-time interactive class, background business, owing to do not guarantee the requirement of speed and transmission delay, therefore can be with reference to this UE average throughput that corresponding business can reach during with network E-UTRAN proper communication under MAC ACTIVE state, be about to from formation buffer performance and begin to move into the average throughput that can reach when the traffic carrying capacity of high limit is finished in scheduling behind the MAC ACTIVE as the reference value to this UE greater than lower bound.Here, average throughput can be disposed by rrc layer according to business characteristic and corresponding UE ability, perhaps according to UE decision of the measured value during continuous communiction under MAC ACTIVE.MSTC sends the opportunity of MAC equity signaling to the UE that is in MAC DORMANT state, when may be selected in UE by ascending physical signal control channel report CQI, because UE this moment is also monitored schedule information on the downlink physical control channel in the DRX mode, so MSTC just need not constantly to keep synchronously with the DRX of UE.
Fig. 3 is a basic flow sheet of the present invention.As shown in Figure 3, establishing the UE initial condition is MAC ACTIVE, and step comprises according to the preferred embodiment of the present invention:
Step 11, under MAC ACTIVE state, the migration of MSTC control mac state, QBOM measures the formation buffer performance simultaneously, and execution in step 12 afterwards;
Step 12, under MAC ACTIVE state, MSTC is provided with first timer TIMER1 after receiving that the buffer performance lower bound of QBOM arrive to trigger message, and the buffer performance that is used to calculate formation remains on the following duration of lower bound, and execution in step 13 afterwards;
Step 13, after TIMER1 is overtime, MSTC call function Get_BO, to obtain the buffer performance of formation, execution in step 14 afterwards;
Step 14 judges whether the queue buffer occupancy is higher than lower bound, if this value is higher than lower bound, then returns execution in step 11, otherwise if be not higher than lower bound, then execution in step 15;
Step 15, MSTC sends MAC layer equity signaling to UE, and MAC DORMANT state is provided with second timer TIMER2 simultaneously so that UE moves into, the buffer performance that is used to calculate formation remains on the duration that high limit is following or continue to remain on lower bound, and execution in step 16 afterwards;
Step 16, after TIMER2 was overtime, MSTC call function Get_BO was to obtain buffer performance, and execution in step 17 afterwards;
Step 17 judges whether the queue buffer occupancy is higher than lower bound, if be higher than, then execution in step 18, otherwise then execution in step 19;
Step 18 judge whether the queue buffer occupancy is higher than high limit, if be higher than, then execution in step 21, otherwise then execution in step 20;
Step 19, MSTC sends MAC layer equity signaling to UE, makes the longer DRX cycle period work of UE, and execution in step 20 afterwards;
Step 20, under MAC DORMANT state, when MSTC receive the buffer threshold value height of QBOM be limited to reach trigger message after, with the MAC layer equity signaling UE MAC ACTIVE state of moving into, return step 11 afterwards, the migration that gets the hang of circulates; And
Step 21, MSTC sends MAC layer equity signaling with the notice UE MAC ACTIVE state of moving into to UE, returns step 11 afterwards, and the migration circulation gets the hang of.
Like this, according to step shown in Figure 3, just realized the switching between two kinds of mac states.It is noted that and utilize first/second timer to realize the control of two-stage DRX cycle period here, yet can also set up a plurality of timers with the more multi-level control of realization, thereby reach the effect of dynamic control UE battery saving mode for the present invention.In other words, a plurality of timers are supported multistage discontinuous reception cycle period, and the rank of wherein said discontinuous reception cycle period is identical with the quantity of described a plurality of timers.In addition, in specification, be that example has illustrated preferred implementation of the present invention, yet be to be understood that and realize purpose of the present invention by one or more timers are set so that two timers to be set.
Next, be example with an embodiment of the invention, specify that the QBOM example cooperates the step of finishing the migration of downlink business mac state in the MAC layer of network side E-UTRAN with the MSTC example.
Fig. 4 a to 4e shows main program module of the present invention respectively, and the algorithm flow chart of Event_Threshold-Low_In_Active interrupt service routine, Event_TIMER1_OUT interrupt service routine, Event_TIMER2_OUT interrupt service routine and Event_Threshold-High_In_DORMENT interrupt service routine.
Wherein, the step of main program comprises:
Step 100, when being in MAC ACTIVE state, MSTC obtains PDU (protocol Data Unit) in the schedule gaps of a TTI (Transmission Time Interval) or plurality of continuous TTI from formation, be submitted to next processing entities of MAC layer, and when being in MAC DORMANT state, MSTC is the PDU of scheduling queue not; Execution in step 120 afterwards;
Step 120, MSTC receives feedback information and the measurement report of UE, waits for that the queue buffer occupancy thresholding of QBOM triggers the message interrupt event; When being in MAC ACTIVE state, MSTC receives the overtime interrupt event of timer TIMER1, and when being in MAC DORMANT state, MSTC receives the overtime interrupt event of timer TIMER2; Wait for schedule gaps next time, return execution in step 100 afterwards.
Under MAC ACTIVE state, after MSTC receives that the lower bound of QBOM arrives triggering message, carry out the Event_Threshold-Low_In_Active interrupt service routine, its step comprises:
Step 210:MSTC is provided with timer TIMER1, returns step 110 afterwards.
Afterwards, after MSTC receives the overtime incident of timer TIMER1, carry out the Event_TIMER1_OUT interrupt service routine, its step comprises:
Step 310:MSTC calls the Get_BO function, obtains the buffer queue zone state, and execution in step 320 afterwards;
Whether step 320:MSTC judges the queue buffer occupancy greater than lower bound, if greater than, then return step 110, if instead be not more than, then execution in step 330;
Step 330 sends MAC layer equity signaling to UE, makes the UE MAC DORMANT state of moving into, and execution in step 340 afterwards; And
Step 340, MSTC is provided with timer TIMER2, returns step 110 afterwards.
Afterwards, after MSTC receives the overtime incident of timer TIMER2, trigger the Event_TIMER2_OUT interrupt service routine, its step comprises:
Step 410:MSTC calls the Get_BO function, and to obtain the buffer queue zone state, execution in step 420 afterwards;
Whether step 420 judges the queue buffer occupancy greater than lower bound, if greater than, then execution in step 440, if instead be not more than, then execution in step 430;
Step 430, MSTC sends MAC layer equity signaling to UE, makes UE with longer DRX cycle period work, returns step 110 afterwards;
Whether step 440 judges the queue buffer occupancy greater than the high limit, if greater than, then execution in step 450, if instead be not more than, then return step 110; And
Step 450 sends MAC layer equity signaling to UE, makes the UE MAC ACTIVE state of moving into, and returns step 110 afterwards.
Under MAC DORMANT state, whenever when receiving that the height of QBOM is limited to, MSTC reaches when triggering message, carry out the Event_Threshold-High_In_DORMENT interrupt service routine, its step comprises:
Step 510: send MAC layer equity signaling to UE, make the UE MAC ACTIVE state of moving into, return step 110 afterwards.
Though should be pointed out that invention has been described by above-mentioned execution mode, yet the present invention also can have other numerous embodiments.Without departing from the spirit and scope of the present invention; those of ordinary skill in the art obviously can make various corresponding changes and distortion to the present invention, but these changes and distortion all should belong in the scope that claims of the present invention and equivalent thereof protect.
Claims (8)
1. the control method of moving between MAC active state and MAC inactive state is used for the Radio Resource control connection pattern of 3G (Third Generation) Moblie long evolving system, it is characterized in that, comprises the steps:
Step 1 is provided with queue buffer occupancy measurement module and mac state migration control module in the MAC of network side layer;
Step 2 is provided with the threshold value of its buffer performance to the service quality priority formation of subscriber equipment in the described MAC layer, comprises high limit and lower bound;
Step 3 when described subscriber equipment is in the MAC active state, if its queue buffer occupancy is not higher than described lower bound and continues the scheduled time, then triggers it and moves to the MAC inactive state from the MAC active state;
Step 4 when described subscriber equipment is in the MAC inactive state, if its queue buffer occupancy is not higher than described lower bound and continues the scheduled time, then keeps its state and triggers it with longer discontinuous cycle period work; And
Step 5 when described subscriber equipment is in the MAC inactive state, if the queue buffer occupancy is limit greater than height, then triggers it and moves to the MAC active state from the MAC inactive state;
Wherein, to the service quality priority formation of each the described subscriber equipment in the described MAC layer all be provided with two respectively with described queue buffer occupancy measurement module and the corresponding example of described mac state migration control module, described mac state migration control module example is provided with timer module, described timer module comprises that a plurality of timers are to support multistage discontinuous reception cycle period, thereby reach the purpose of the described subscriber equipment battery saving mode of dynamic control, the rank of wherein said discontinuous reception cycle period is identical with the quantity of described a plurality of timers.
2. method according to claim 1, it is characterized in that, the example of described queue buffer occupancy measurement module provides a function to obtain the buffer performance of described formation, and whether arrive threshold value according to the buffer performance of described formation and send relative trigger message, comprise that lower bound arrives to trigger message and height and be limited to and reach triggering message.
3. method according to claim 1, it is characterized in that, the example of described mac state migration control module is used to receive the triggering message of the example of described queue buffer occupancy measurement module, or calls described function obtaining the queue buffer occupancy, thus the migration of control mac state.
4. method according to claim 1 is characterized in that, described step 3 comprises:
Step 31, after receiving that described lower bound arrives triggering message, described mac state migration control module example is provided with first timer, is used to calculate the queue buffer occupancy and remains on the following duration of described lower bound; And
Step 32, after described first timer was overtime, if the queue buffer occupancy is not higher than described lower bound, then described mac state migration control module example sent MAC layer equity signaling to trigger its MAC inactive state of moving into to described subscriber equipment; Otherwise, keep the current state of described subscriber equipment.
5. method according to claim 1 is characterized in that, described step 4 comprises:
Step 41, after described subscriber equipment was moved into the MAC inactive state, described mac state migration control module example was provided with second timer, was used to calculate the queue buffer occupancy and remained on the duration that described high limit is following or continue to remain on described lower bound; And
Step 42, after described second timer is overtime, if the queue buffer occupancy is not higher than described lower bound, described mac state migration control module example sends MAC layer equity signaling to trigger described subscriber equipment with longer discontinuous cycle period work to described subscriber equipment; Otherwise, keep the current state of described subscriber equipment.
6. method according to claim 1 is characterized in that, described step 5 comprises:
Described mac state migration control module example is limited to reach and triggers message and judge that described queue buffer occupancy is higher than described high limit by receiving described height, and, stop the timing of described first timer and described second timer simultaneously by sending MAC layer equity signaling to described subscriber equipment to trigger its MAC active state of moving into.
7. according to claim 5 or 6 described methods, it is characterized in that, under the MAC inactive state, described mac state migration control module example sends opportunity from MAC layer equity signaling to described subscriber equipment is at described subscriber equipment during by the indication of ascending physical signal control channel reporting channel quality, thereby need not constantly to keep synchronously with described user's discontinuous reception.
8. one kind is used to control the system that moves between MAC active state and MAC inactive state, it is characterized in that, is provided with in network side MAC layer with lower module:
The service quality priority formation module of a plurality of subscriber equipmenies, and its buffer performance is provided with lower bound and two threshold values of high limit;
Queue buffer occupancy measurement module is used to measure the state of described formation module; And
Mac state migration control module is used to control the migration of mac state; And
Wherein, when described subscriber equipment is in the MAC active state,, then triggers it and move to the MAC inactive state from the MAC active state if its queue buffer occupancy is not higher than described lower bound and continues the scheduled time;
When described subscriber equipment is in the MAC inactive state,, then keeps its state and trigger it with longer discontinuous cycle period work if its queue buffer occupancy is not higher than described lower bound and continues the scheduled time;
When described subscriber equipment is in the MAC inactive state,, then triggers it and move to the MAC active state from the MAC inactive state if the queue buffer occupancy is limit greater than height;
Each of described service quality priority formation module example and described mac state of a corresponding described queue buffer occupancy measurement module is respectively moved the example of control module, described mac state migration control module example is provided with timer module, described timer module comprises that a plurality of timers are to support multistage discontinuous reception cycle period, thereby reach the purpose of the described subscriber equipment battery saving mode of dynamic control, the rank of wherein said discontinuous reception cycle period is identical with the quantity of described a plurality of timers.
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| CN2005101306706A CN1988710B (en) | 2005-12-20 | 2005-12-20 | Method and system for controlling MAC state shifting |
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| WO2012121751A1 (en) * | 2011-03-07 | 2012-09-13 | Intel Corporation | Grouped machine-to-machine communications |
| CN107040597B (en) * | 2017-04-18 | 2019-11-08 | 重庆邮电大学 | A kind of MAC layer more Design Method of Instance in LTE system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1218346A (en) * | 1997-09-25 | 1999-06-02 | 索尼株式会社 | Communication method, and data communications terminal, with data communication protocol for Inter-layer flow control |
| CN1464665A (en) * | 2002-06-11 | 2003-12-31 | 华为技术有限公司 | Method for switching between different systems in CDMA communication system |
| CN1671243A (en) * | 2005-05-11 | 2005-09-21 | 北京北方烽火科技有限公司 | A method of hard switch between heterogeneous systems for WCDMA system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1218346A (en) * | 1997-09-25 | 1999-06-02 | 索尼株式会社 | Communication method, and data communications terminal, with data communication protocol for Inter-layer flow control |
| CN1464665A (en) * | 2002-06-11 | 2003-12-31 | 华为技术有限公司 | Method for switching between different systems in CDMA communication system |
| CN1671243A (en) * | 2005-05-11 | 2005-09-21 | 北京北方烽火科技有限公司 | A method of hard switch between heterogeneous systems for WCDMA system |
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