CN103096352B - Synchronizing channel monitor method, device and mobile terminal - Google Patents
Synchronizing channel monitor method, device and mobile terminal Download PDFInfo
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Abstract
The invention discloses a kind of method, device and the mobile terminal monitored for synchronizing channel, relate to mobile communication technology.The method comprises: the SCH signal reading two or more neighbor cell on the two or more time slot of a tdma frame; Demodulation is carried out to the SCH signal of the two or more NCell read.Can by reading the SCH signal of two or more NCell in a frame, accelerate NCell? does the reading of SCH channel, improve and reads NCell? the efficiency of SCH.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of synchronizing channel monitor method, device and mobile terminal.
Background technology
Along with the development of mobile communication technology, various mobile terminal (MS) more and more gos deep into the life of people, becomes part indispensable in people's life.In the process using mobile terminal communication, may need to carry out switching (Handover) between different communities (Cell).The prerequisite of handover success is the signal that mobile terminal can solve the Target cell of switching.In order to ensure the continuity of communication, need the synchronizing channel (SCH) continuing to monitor neighbor cell (NeighborCell, NCell).Monitoring can help mobile terminal to find the community that can successfully solve, and MS also can be helped to reject the community that cannot successfully solve.
In units of a frame, the SCH channel reading (Read) neighbor cell is generally arranged in prior art; Have free time (IDLE) frame in every 26 time division multiple access (TimeDivisionMultipleAddress, TDMA) frames, MS utilizes this idle frame arrangement to read the carrier frequency of NCell, and the carrier frequency reading a NCell takies an idle frame.When the NCell needing to read is a lot, MS possibly cannot complete the task of reading all NCell carrier frequency in official hour, thus cannot screen out the signal quality of NCell in official hour, thus affect handover success rate.
When network signal is unstable, often need to read the SCH information that repeatedly correctly could read this NCell continuously to the SCH of a NCell.Because the number of times monitoring some community becomes many, make monitoring one take turns cycle of NCell (all NCell are monitored a time) elongated, this can increase the load of monitoring task undoubtedly.At this moment, monitoring task can become very heavy.If system can not be used for switching in the good community of Timeliness coverage, then can cause switching; If poor community can not be rejected in time, then MS may be caused to cause handoff failure to the cell merge of difference, therefore often occur monitoring cause not in time cannot the phenomenon of successful switch, thus affect speech quality.
Summary of the invention
In view of the above problem existed in prior art proposes the present invention.
An object of the present invention is to provide a kind of technical scheme monitored for synchronizing channel.
According to a first aspect of the invention, provide a kind of synchronizing channel monitor method, the method comprises: the SCH signal reading two or more neighbor cell (NCell) on the two or more time slot of time division multiple access (TDMA) frame; Demodulation is carried out to the SCH signal of the two or more NCell read.
Preferably, the SCH signal two or more time slot of a tdma frame reading two or more NCell comprises: determine will to read in current TDMA frame the assigned timeslot in the two or more NCell of SCH signal and the current TDMA frame corresponding with two or more NCell; Before assigned timeslot by RF receiver be tuned to the frequency of the NCell corresponding with assigned timeslot; The SCH signal of the NCell corresponding with assigned timeslot is read at assigned timeslot.
Preferably, the assigned timeslot determining will to read in current TDMA frame in the two or more NCell of SCH signal and the current TDMA frame corresponding with two or more NCell comprises: determine the NCell of SCH in current TDMA frame and corresponding time slot thereof; When there is conflict in two or more NCell, the time slot of the NCell that selection priority is the highest and correspondence thereof.
Preferably, two or more NCell exist SCH that conflict is two or more NCell in time overlapping or time interval be less than predetermined threshold.
Preferably, according to the frequency of failure of NCell and/or the priority of signal strength signal intensity setting NCell.
Preferably, the method also comprises: the demodulation result of SCH signal is reported upper strata.
According to a first aspect of the invention, provide a kind of synchronizing channel monitoring device, this device comprises: multi-slot reading unit, for reading the SCH signal of two or more neighbor cell NCell on two or more time slots of a time division multiple access tdma frame; Signal demodulation unit, for carrying out demodulation to the SCH signal of the two or more NCell read.
Preferably, multi-slot reading unit comprises: community determination module, for determining will to read in current TDMA frame the assigned timeslot in two or more NCell of SCH signal and the current TDMA frame corresponding with two or more NCell; Frequency control module, for before assigned timeslot by RF receiver be tuned to the frequency of the NCell corresponding with assigned timeslot; Signal reading module, for reading the SCH signal of the NCell corresponding with assigned timeslot at assigned timeslot.
Preferably, community determination module, for determining the NCell of SCH in current TDMA frame and the time slot of correspondence thereof, when two or more NCell exists conflict, selects the time slot of the highest NCell of priority and correspondence thereof.
Preferably, the SCH that two or more NCell existence conflict is two or more NCell there is overlap in time or time interval is less than predetermined threshold.
Preferably, the priority of NCell is according to the frequency of failure of NCell and/or signal strength signal intensity setting.
Preferably, this device also comprises: result reports unit, for the demodulation result of SCH signal is reported upper strata.
According to another aspect of the invention, provide a kind of mobile terminal, above-mentioned synchronous channel SCH monitoring device
An advantage of the present invention is, by reading the SCH signal of two or more NCell in a frame, can accelerate the reading of NCellSCH channel, improves the efficiency reading NCellSCH.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
What form a part for specification drawings describes embodiments of the invention, and together with the description for explaining principle of the present invention.
With reference to accompanying drawing, according to detailed description below, clearly the present invention can be understood, wherein:
Fig. 1 illustrates the flow chart of an embodiment according to synchronizing channel monitor method of the present invention;
Fig. 2 illustrates the flow chart of another embodiment according to synchronizing channel monitor method of the present invention;
Fig. 3 illustrates the flow chart of another embodiment according to synchronizing channel monitor method of the present invention;
Fig. 4 illustrates the structure chart of an embodiment according to synchronizing channel monitoring device of the present invention;
Fig. 5 illustrates the structure chart of an embodiment according to mobile terminal of the present invention.
Embodiment
Various exemplary embodiment of the present invention is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, technology, method and apparatus should be regarded as a part of authorizing specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
Each tdma frame generally includes 8 time slots (slot), when reading the SCH channel of a NCell, only needs to use one of them specific time slot.Although the SCH reading NCell in prior art only needs a time slot, still need the time taking a frame, remaining time slot has been wasted.The present invention proposes the SCH arranging to read multiple NCell in a frame, thus can read the SCH signal of more NCell within the same time.
Fig. 1 illustrates the flow chart of an embodiment according to synchronizing channel monitor method of the present invention.
As shown in Figure 1, step 102, mobile terminal reads the SCH signal of two or more NCell on the two or more time slot of a tdma frame.The SCH signal reading a NCell takies a time slot, makes the SCH signal that can read two or more NCell in a tdma frame.Such as, 2 time slots can be arranged in tdma frame to read the SCH signal of two NCell respectively, or arrange 3 or 4 time slots to read the SCH signal etc. of 3 or 4 NCell respectively.
Step 104, the SCH signal of mobile terminal to the two or more NCell read carries out demodulation.Demodulation is carried out to carry out subsequent treatment to the SCH signal of the NCell read.
In above-described embodiment, by reading the SCH signal of two or more NCell in a frame, the reading of NCellSCH channel can be accelerated, more than NCellSCH efficiency raising 2-3 times even will be read, make the reading task that also can complete all NCell under weak signal, complicated network environment in time.
The SCH channel of NCell is generally at the 1st slot (No. 0 slot) of NCell.But, each community does not have synchronized relation between fiducial time, so when mobile terminal reads the SCH signal of a community, need the timing according to this community (Timing) relation to determine a specific slot, make this MS can read the SCH information of this NCell on this slot.
Fig. 2 illustrates the flow chart of another embodiment according to synchronizing channel monitor method of the present invention.
As shown in Figure 2, step 202, will read the assigned timeslot in the two or more NCell of SCH signal and the current TDMA frame corresponding with two or more NCell in mobile terminal determination current TDMA frame.The SCH signal place time slot of different NCell may drop on the different time-gap of the current TDMA frame of mobile terminal, and mobile terminal determines that SCH signal drops on the NCell of the different time-gap of current TDMA frame, and the time slot that NCell is corresponding.
Step 204, before assigned timeslot by RF (RadioFrequency, radio frequency) receiver be tuned to the frequency of the NCell corresponding with assigned timeslot.The frequency of different neighbor cells is different.For special neighbourhood community, by frequency corresponding to this special neighbourhood community for the frequency tuning of mobile terminal RF receiver before the assigned timeslot receiving this special neighbourhood cell signal.
Step 206, reads the SCH signal of the NCell corresponding with assigned timeslot at assigned timeslot.After the frequency adjustment of RF receiver is ready, just can read the SCH signal of corresponding NCell at this assigned timeslot.
Step 208, reports upper strata by the demodulation result of SCH signal.If restituted signal success, then by the SCH information reporting that demodulates to upper strata, if restituted signal failure, then failure result is reported upper strata, carries out subsequent treatment by upper strata.
In the above-described embodiments, determine the NCell that will read and corresponding time slot thereof, and before assigned timeslot by the frequency tuning of RF receiver to respective frequencies, the read work of SCH signal can be completed better.
Fig. 3 illustrates the flow chart of another embodiment according to synchronizing channel monitor method of the present invention.
As shown in Figure 3, step 302, determines all NCells of SCH signal at the present frame of mobile terminal, and the time slot that each NCell is corresponding.
Step 304, judges whether there is conflict between each NCell, if so, then continues step 306, otherwise, continue step 308.Exist between each NCell conflict can be two or more NCell SCH in time overlapping or time interval be less than predetermined threshold.Such as, in one embodiment, at least one, interval time slot between the NCell that monitor, thus can after the SCH signal of a monitoring NCell, the frequency that the next NCell utilizing time slot below the frequency of RF receiver to be adjusted to will to monitor is corresponding.
Step 306, selects the NCell that priority is the highest between the NCell that there is conflict, for unselected NCell, can be arranged in next frame of monitoring and read SCH signal.
Step 308, sorts the NCell selected according to the sequencing of corresponding time slot.
Step 310, sends the NCell sequence after sequence to RF receiver, and the time slot of each NCell and frequency.
Step 312, before assigned timeslot by RF receiver be tuned to the frequency of the NCell corresponding with assigned timeslot.
Step 314, reads the SCH signal of the NCell corresponding with assigned timeslot at assigned timeslot.
Step 316, carries out demodulation to the SCH signal of the NCell read.
Step 318, reports upper strata by the demodulation result of SCH signal.
Does step 320, judge in this frame the need of the SCH signal monitoring other NCell? if so, step 312 is continued, otherwise, terminate.
For the setting of NCell priority, one or more factor can be considered.Such as, can according to the priority of the frequency of failure setting NCell of NCell.The NCell that the frequency of failure is fewer, priority is higher.Some NCell signal strength signal intensity is fine, but due to the uncertainty of space interference, still there will be and read failed situation.After such NCell arranges to read again, successful probability is very large, if but repeatedly read all failed, illustrate that this NCell receives stronger, also very lasting interference, then read successful probability and obviously decline.This illustrates, the NCell that the frequency of failure is more, read successful probability lower, priority is lower.Can also according to the signal strength signal intensity determination priority of NCell.The NCell that signal strength signal intensity is higher, priority is higher.Under similarity condition, the NCell that signal strength signal intensity is higher, signal quality will be better, so want preferentially to be found out by this NCell.In addition, priority can also be determined in conjunction with the frequency of failure and signal strength signal intensity.Such as first consider the frequency of failure, if the frequency of failure is identical, then consider signal strength signal intensity.
In above-described embodiment, when NCell clashes, select the preferential NCell read according to the priority of NCell, the success rate of the SCH monitoring NCell can be improved, thus improve the success rate switched.
Fig. 4 illustrates the structure chart of an embodiment according to synchronizing channel monitoring device of the present invention.As shown in Figure 4, in this embodiment, synchronizing channel monitoring device comprises multi-slot reading unit 41 and signal demodulation unit 42.Multi-slot reading unit 41 reads the SCH signal of two or more neighbor cell NCell on two or more time slots of a tdma frame, and the SCH signal of reading is sent to signal demodulation unit 42; Signal demodulation unit 42 receives SCH signal, carries out demodulation to the SCH signal of the two or more NCell read.
In above-described embodiment, multi-slot reading unit reads the SCH signal of two or more NCell in a frame, the reading of NCellSCH signal can be accelerated, more than efficiency raising 2-3 times even of reading NCellSCH, make the reading task that also can complete all NCell under weak signal, complicated network environment in time.
Fig. 5 illustrates the structure chart of an embodiment according to mobile terminal of the present invention.As shown in Figure 5, the mobile terminal 500 of this embodiment comprises reception antenna 54, also comprises multi-slot reading unit 51 and signal demodulation unit 42.Wherein, multi-slot reading unit 51 comprises: community determination module 511, determines will to read in current TDMA frame the assigned timeslot in two or more NCell of SCH signal and the current TDMA frame corresponding with two or more NCell.Such as, community determination module 511 determines the NCell of SCH in current TDMA frame and the time slot of correspondence thereof, when there is conflict in two or more NCell, and the time slot of the NCell that selection priority is the highest and correspondence thereof; Two or more NCell existence conflict can be that the SCH of two or more NCell exists overlap in time or time interval is less than predetermined threshold, and the priority of NCell can according to the frequency of failure of NCell and/or signal strength signal intensity setting.Frequency control module 512 before assigned timeslot by RF receiver be tuned to the frequency of the NCell corresponding with assigned timeslot; Signal reading module 513 reads the SCH signal of the NCell corresponding with assigned timeslot at assigned timeslot, and the SCH signal of reading is sent to signal demodulation unit 42.According to one embodiment of present invention, this mobile terminal 500 also comprises result and reports unit 53, and demodulation result is sent to result and reports unit 53 by signal demodulation unit 42, reports unit 53 that the demodulation result of SCH signal is reported upper strata by result.
In the above-described embodiments, community determination module determines the NCell that will read and corresponding time slot thereof, frequency control module before assigned timeslot by the frequency tuning of RF receiver to respective frequencies, the read work of SCH signal can be completed better.
So far, described in detail according to synchronizing channel monitor method of the present invention, device and the mobile terminal comprising this device.In order to avoid covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
Method and system of the present invention may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes method and system of the present invention.Said sequence for the step of described method is only to be described, and the step of method of the present invention is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, can be also record program in the recording medium by the invention process, these programs comprise the machine readable instructions for realizing according to method of the present invention.Thus, the present invention also covers the recording medium stored for performing the program according to method of the present invention.
Although be described in detail specific embodiments more of the present invention by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (13)
1. synchronizing channel (SCH) monitor method, is characterized in that, comprising:
The two or more time slot of a time division multiple access frame reads the SCH signal of two or more neighbor cell, wherein, at least one, interval time slot between two time slots reading the SCH signal of neighbor cell;
Demodulation is carried out to the SCH signal of the two or more neighbor cell of reading;
Wherein, the described SCH signal reading two or more neighbor cell on the two or more time slot of a time division multiple access frame comprises:
Determine in current time division multiple access frame, to read the two or more neighbor cell of SCH signal and the assigned timeslot described current time division multiple access frame in corresponding with described two or more neighbor cell;
The SCH signal of the neighbor cell corresponding with described assigned timeslot is read at described assigned timeslot.
2. method according to claim 1, is characterized in that, the described SCH signal reading two or more neighbor cell on the two or more time slot of a time division multiple access frame also comprises:
Before described assigned timeslot by radio frequency receiver be tuned to the frequency of the neighbor cell corresponding with described assigned timeslot.
3. method according to claim 2, is characterized in that, the assigned timeslot determining will to read in current time division multiple access frame in the two or more neighbor cell of SCH signal and the described current time division multiple access frame corresponding with described two or more neighbor cell comprises:
Determine the neighbor cell of SCH in described current time division multiple access frame and the time slot of correspondence thereof;
When there is conflict in two or more neighbor cell, the time slot of the neighbor cell that selection priority is the highest and correspondence thereof.
4. method according to claim 3, is characterized in that, described two or more neighbor cell exist SCH that conflict is two or more neighbor cell in time overlapping or time interval be less than predetermined threshold.
5. method according to claim 3, is characterized in that, according to the frequency of failure of neighbor cell and/or the priority of signal strength signal intensity setting neighbor cell.
6. method according to claim 1, is characterized in that, also comprises:
The demodulation result of SCH signal is reported upper strata.
7. synchronizing channel (SCH) monitoring device, is characterized in that, comprising:
Multi-slot reading unit, for reading the SCH signal of two or more neighbor cell on two or more time slots of a time division multiple access frame, wherein, at least one, interval time slot between two time slots reading the SCH signal of neighbor cell;
Signal demodulation unit, for carrying out demodulation to the SCH signal of the two or more neighbor cell of reading;
Wherein, described multi-slot reading unit comprises:
Community determination module, for determining will to read in current time division multiple access frame the assigned timeslot in two or more neighbor cell of SCH signal and the described current time division multiple access frame corresponding with described two or more neighbor cell;
Signal reading module, for reading the SCH signal of the neighbor cell corresponding with described assigned timeslot at described assigned timeslot.
8. device according to claim 7, is characterized in that, described multi-slot reading unit also comprises: frequency control module, for before described assigned timeslot by radio frequency receiver be tuned to the frequency of the neighbor cell corresponding with described assigned timeslot.
9. device according to claim 8, it is characterized in that, described community determination module is for determining the neighbor cell of SCH in described current time division multiple access frame and the time slot of correspondence thereof, when there is conflict in two or more neighbor cell, the time slot of the neighbor cell that selection priority is the highest and correspondence thereof.
10. device according to claim 9, is characterized in that, described two or more neighbor cell exists SCH that conflict is two or more neighbor cell and there is overlap in time or time interval is less than predetermined threshold.
11. devices according to claim 9, is characterized in that, the priority of neighbor cell is according to the frequency of failure of neighbor cell and/or signal strength signal intensity setting.
12. devices according to claim 7, is characterized in that, also comprise:
Result reports unit, for the demodulation result of SCH signal is reported upper strata.
13. 1 kinds of mobile terminals, comprise the synchronizing channel monitoring device in claim 7 to 12 described in any one.
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