CN103096352A - Monitoring method, device and mobile terminal of synchronizing channel - Google Patents
Monitoring method, device and mobile terminal of synchronizing channel Download PDFInfo
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- CN103096352A CN103096352A CN2011103325764A CN201110332576A CN103096352A CN 103096352 A CN103096352 A CN 103096352A CN 2011103325764 A CN2011103325764 A CN 2011103325764A CN 201110332576 A CN201110332576 A CN 201110332576A CN 103096352 A CN103096352 A CN 103096352A
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Abstract
The invention discloses a monitoring method, a device and a mobile terminal of a synchronizing channel and relates to mobile communication technology. The monitoring method of the synchronizing channel comprises the following steps: reading more than two SCH signals of adjacent residential quarters in two or more time slots of a time division multiple address (TDMA) frame; demodulating more than two read SCH signals of the NCell. By means of reading the more than two SCH signals of the NCell in a frame, reading speed of the NCell SCH channel can be quickened and reading efficiency of the NCell SCH can be improved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of synchronizing channel monitor method, device and mobile terminal.
Background technology
Along with the development of mobile communication technology, various mobile terminals (MS) more and more go deep into people's life, become indispensable part in people's life.In the process of using mobile terminal communication, may switch (Handover) between different residential quarters (Cell).The prerequisite of handover success is the signal that mobile terminal can solve the Target cell of switching.In order to guarantee the continuity of communication, need to continue to monitor the synchronizing channel (SCH) of neighbor cell (Neighbor Cell, NCell).Monitoring can help mobile terminal to find the residential quarter that can successfully solve, and also can help MS to reject the residential quarter that can't successfully solve.
Generally arrange to read the SCH channel of (Read) neighbor cell in prior art take a frame as unit; In every 26 time division multiple accesses (Time Division Multiple Address, TDMA) frame, a free time (IDLE) frame is arranged, MS utilizes this idle frame arrangement to read the carrier frequency of NCell, and the carrier frequency that reads a NCell takies an idle frame.When the NCell that reads when needs was a lot, MS possibly can't complete the task of reading all NCell carrier frequency in setting time, thereby can't screen out in setting time the signal quality of NCell, thereby affects handover success rate.
When network signal is unstable, often need the SCH of a NCell is read the SCH information that repeatedly could correctly read this NCell continuously.Because the number of times of monitoring some residential quarter becomes many, make and monitor one to take turns cycle of NCell (all NCell are monitored a time) elongated, this can increase the load of monitoring task undoubtedly.At this moment, it is very heavy that monitoring task can become.If the residential quarter that system can not in time find is used for switching, can causes and to switch; If can not in time reject poor residential quarter, may cause MS to switch to poor residential quarter and cause handoff failure, therefore often occur monitoring untimely cause can't successful switch phenomenon, thereby affect speech quality.
Summary of the invention
In view of the above problem that exists in prior art proposes the present invention.
An object of the present invention is to provide a kind of technical scheme for the synchronizing channel monitoring.
According to a first aspect of the invention, provide a kind of synchronizing channel monitor method, the method comprises: the SCH signal that reads two above neighbor cells (NCell) on two above time slots of a time division multiple access (TDMA) frame; SCH signal to two above NCell reading carries out demodulation.
Preferably, the SCH signal that reads two above NCell on two above time slots of a tdma frame comprises: determine will to read in current tdma frame two above NCell of SCH signal and the assigned timeslot in the current tdma frame corresponding with two above NCell; Before assigned timeslot with the RF receiver be tuned to the frequency of the NCell corresponding with assigned timeslot; Read the SCH signal of the NCell corresponding with assigned timeslot at assigned timeslot.
Preferably, determining will to read in current tdma frame two above NCell of SCH signal and the assigned timeslot in the current tdma frame corresponding with two above NCell comprises: determine the NCell of SCH in current tdma frame and corresponding time slot thereof; When there is conflict in two above NCell, select the highest NCell of priority and corresponding time slot thereof.
Preferably, two above NCell exist conflict be two above NCell SCH in time overlapping or time interval less than predetermined threshold.
Preferably, the priority of setting NCell according to the frequency of failure and/or the signal strength signal intensity of NCell.
Preferably, the method also comprises: the demodulation result of SCH signal is reported the upper strata.
According to a first aspect of the invention, provide a kind of synchronizing channel monitoring device, this device comprises: the multi-slot reading unit is used for reading the SCH signal of two above neighbor cell NCell on two or more time slots of a time division multiple access tdma frame; Signal demodulation unit is used for the SCH signal of two above NCell reading is carried out demodulation.
Preferably, the multi-slot reading unit comprises: the residential quarter determination module, be used for to determine will to read in current tdma frame two or more NCell of SCH signal and the assigned timeslot in the current tdma frame corresponding with two or more NCell; Frequency control module, be used for before assigned timeslot with the RF receiver be tuned to the frequency of the NCell corresponding with assigned timeslot; Signal reading module is for read the SCH signal of the NCell corresponding with assigned timeslot at assigned timeslot.
Preferably, the residential quarter determination module is used for determining NCell and the corresponding time slot thereof of SCH in current tdma frame, when there is conflict in two above NCell, selects the highest NCell of priority and corresponding time slot thereof.
Preferably, two above NCell exist conflict be the SCH of two above NCell exist in time overlapping or time interval less than predetermined threshold.
Preferably, the priority of NCell is set according to the frequency of failure and/or the signal strength signal intensity of NCell.
Preferably, this device also comprises: result reports the unit, is used for the demodulation result of SCH signal is reported the 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 read the SCH signal of two above NCell in a frame, can accelerate reading of NCell SCH channel, improves the efficient that reads NCellSCH.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, it is clear that further feature of the present invention and advantage thereof will become.
Description of drawings
The accompanying drawing that consists of the part of specification has been described embodiments of the invention, and is used for explaining principle of the present invention together with the description.
With reference to accompanying drawing, according to following detailed description, can more be expressly understood the present invention, wherein:
Fig. 1 illustrates the flow chart according to an embodiment of synchronizing channel monitor method of the present invention;
Fig. 2 illustrates the flow chart according to another embodiment of synchronizing channel monitor method of the present invention;
Fig. 3 illustrates the flow chart according to another embodiment of synchronizing channel monitor method of the present invention;
Fig. 4 illustrates the structure chart according to an embodiment of synchronizing channel monitoring device of the present invention;
Fig. 5 illustrates the structure chart according to an embodiment of mobile terminal of the present invention.
Embodiment
Describe various exemplary embodiment of the present invention in detail now with reference to accompanying drawing.It should be noted that: unless illustrate in addition, the parts of setting forth in these embodiments and positioned opposite, numeral expression formula and the numerical value of step do not limit the scope of the invention.
Below be illustrative to the description only actually of at least one exemplary embodiment, 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 suitable situation, technology, method and apparatus should be regarded as authorizing the part of specification.
In all examples with discussing shown here, it is exemplary that any occurrence should be construed as merely, rather than 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, in case be defined in an a certain Xiang Zaiyi accompanying drawing, do not need it is further discussed 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.Only need a time slot although read the SCH of NCell in prior art, still need to take the time of a frame, remaining time slot has been wasted.The present invention proposes to arrange to read the SCH of a plurality of NCell in a frame, thereby can read the SCH signal of more NCell within the same time.
Fig. 1 illustrates the flow chart according to an embodiment of synchronizing channel monitor method of the present invention.
As shown in Figure 1, step 102, mobile terminal reads the SCH signal of two above NCell on two above time slots of a tdma frame.The SCH signal that reads a NCell takies a time slot, makes the SCH signal that can read two above NCell in a tdma frame.For example, can arrange 2 time slots to read respectively the SCH signal of two NCell in tdma frame, perhaps arrange 3 or 4 time slots to read respectively SCH signal of 3 or 4 NCell etc.
In above-described embodiment, by read the SCH signal of two above NCell in a frame, can accelerate reading of NCell SCH channel, to read NCell SCH efficient improve 2-3 doubly even more than, make at weak signal, complicated net environment and also can in time complete the task that reads of all NCell.
The SCH channel of NCell is generally at the 1st slot of NCell (No. 0 slot).But, each residential quarter does not have synchronized relation between fiducial time, so when mobile terminal reads the SCH signal of a residential quarter, need to determine a specific slot according to timing (Timing) relation of this residential quarter, make this MS can read the SCH information of this NCell on this slot.
Fig. 2 illustrates the flow chart according to another embodiment of synchronizing channel monitor method of the present invention.
As shown in Figure 2, step 202, mobile terminal determines will to read in current tdma frame two above NCell of SCH signal and the assigned timeslot in the current tdma frame corresponding with two above NCell.The SCH signal of different NCell may drop on the different time-gap of the current tdma frame of mobile terminal at time slot, and mobile terminal determines that the SCH signal drops on the NCell of the different time-gap of current tdma frame, and time slot corresponding to NCell.
Step 204, before assigned timeslot with RF (Radio Frequency, radio frequency) receiver be tuned to the frequency of the NCell corresponding with assigned timeslot.The frequency of different neighbor cells is different.For the special neighbourhood residential quarter, the frequency tuning with mobile terminal RF receiver before the assigned timeslot that receives this special neighbourhood cell signal arrives this frequency corresponding to special neighbourhood residential quarter.
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 at this assigned timeslot the SCH signal of corresponding NCell.
Step 208 reports the upper strata with the demodulation result of SCH signal.If restituted signal success, with the SCH information reporting that demodulates to the upper strata, if the restituted signal failure reports the upper strata with failure result, carry out subsequent treatment by the upper strata.
In the above-described embodiments, determine NCell and the corresponding time slot thereof that will read, and before assigned timeslot with the frequency tuning of RF receiver to respective frequencies, can complete better the read work of SCH signal.
Fig. 3 illustrates the flow chart according to another embodiment of synchronizing channel monitor method of the present invention.
As shown in Figure 3, step 302 is determined the SCH signal at all NCell of the present frame of mobile terminal, and time slot corresponding to each NCell.
Does step 320 judge the SCH signal that needs to monitor other NCell in this frame? if so, continue step 312, otherwise, finish.
For the setting of NCell priority, can consider one or more factor.For example, can set according to the frequency of failure of NCell the priority of NCell.The NCell that the frequency of failure is fewer, priority is higher.Some NCell signal strength signal intensity is fine, but the situation of failure still can appear reading in the uncertainty of disturbing due to the space.After such NCell arranged to read again, successful probability was very large, if but repeatedly read all failure, illustrate that this NCell has been subject to more intense, also very lasting interference, then read successful probability and obviously descend.This explanation, the NCell that the frequency of failure is more reads successful probability lower, and priority is just lower.Can also determine priority according to the signal strength signal intensity 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 will preferentially this NCell be found out.In addition, can also determine priority in conjunction with the frequency of failure and signal strength signal intensity.For example 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 clashed, the NCell according to the priority selection of NCell is preferentially read can improve the success rate of the SCH that monitors NCell, thereby improves the success rate of switching.
Fig. 4 illustrates the structure chart according to an embodiment of synchronizing channel monitoring device of the present invention.As shown in Figure 4, in this embodiment, the 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 above neighbor cell NCell on two or more time slots of a tdma frame, the SCH signal that reads is sent to signal demodulation unit 42; Signal demodulation unit 42 receives the SCH signals, and the SCH signal of two above NCell reading is carried out demodulation.
In above-described embodiment, the multi-slot reading unit reads the SCH signal of two above NCell in a frame, can accelerate reading of NCell SCH signal, with the efficient that reads NCell SCH improve 2-3 doubly even more than, make at weak signal, complicated net environment and also can in time complete the task that reads of all NCell.
Fig. 5 illustrates the structure chart according to an embodiment of 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: residential quarter determination module 511, determine will to read in current tdma frame two or more NCell of SCH signal and the assigned timeslot in the current tdma frame corresponding with two or more NCell.For example, residential quarter determination module 511 is determined NCell and the corresponding time slot thereof of SCH in current tdma frame, when there is conflict in two above NCell, selects the highest NCell of priority and corresponding time slot thereof; Two above NCell exist conflict can be the SCH of two above NCell exist in time overlapping or time interval less than predetermined threshold, the priority of NCell can be set according to the frequency of failure and/or the signal strength signal intensity of NCell.Frequency control module 512 before assigned timeslot with the 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, the SCH signal that reads is sent to signal demodulation unit 42.According to one embodiment of present invention, this mobile terminal 500 comprises that also result reports unit 53, and signal demodulation unit 42 sends to result with demodulation result and reports unit 53, reports unit 53 that the demodulation result of SCH signal is reported the upper strata by result.
In the above-described embodiments, definite NCell and the corresponding time slot thereof that will read of residential quarter determination module, frequency control module arrives respective frequencies with the frequency tuning of RF receiver before assigned timeslot, can complete better the read work of SCH signal.
So far, described in detail according to synchronizing channel monitor method of the present invention, the mobile terminal that installs and comprise this device.For fear of covering design of the present invention, details more known in the field are not described.Those skilled in the art can understand how to implement technical scheme disclosed herein fully according to top description.
May realize in many ways method and system of the present invention.For example, can realize method and system of the present invention by any combination of software, hardware, firmware or software, hardware, firmware.The said sequence that is used for the step of described method is only in order to describe, and the step of method of the present invention is not limited to above specifically described order, unless otherwise specify.In addition, in certain embodiments, can be also the program that is recorded in recording medium with the invention process, these programs comprise be used to the machine readable instructions that realizes the method according to this invention.Thereby the present invention also covers the recording medium that storage is used for the program of execution the method according to this invention.
Although by example, specific embodiments more of the present invention are had been described in detail, it should be appreciated by those skilled in the art, above example is only in order to describe, rather than in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can in the situation that do not depart from the scope of the present invention and spirit, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (13)
1. a synchronizing channel (SCH) monitor method, is characterized in that, comprising:
Read the SCH signal of two above neighbor cells on two above time slots of a time division multiple access frame;
SCH signal to two above neighbor cells reading carries out demodulation.
2. method according to claim 1, is characterized in that, the described SCH signal that reads two above neighbor cells on two above time slots of a time division multiple access frame comprises:
Determine to read in current time division multiple access frame two above neighbor cells and the assigned timeslot described current time division multiple access frame in corresponding with described two above neighbor cells of SCH signal;
Before described assigned timeslot with radio frequency receiver be tuned to the frequency of the neighbor cell corresponding with described assigned timeslot;
Read the SCH signal of the neighbor cell corresponding with described assigned timeslot at described assigned timeslot.
3. method according to claim 2, is characterized in that, determines will to read in current time division multiple access frame two above neighbor cells of SCH signal and the assigned timeslot in the described current time division multiple access frame corresponding with described two above neighbor cells and comprise:
Determine neighbor cell and the corresponding time slot thereof of SCH in described current time division multiple access frame;
When there is conflict in two above neighbor cells, select the highest neighbor cell of priority and corresponding time slot thereof.
4. method according to claim 3, is characterized in that, described two above neighbor cells exist conflict be two above neighbor cells SCH in time overlapping or time interval 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 the upper strata.
7. a synchronizing channel (SCH) monitoring device, is characterized in that, comprising:
The multi-slot reading unit is used for reading the SCH signal of two above neighbor cells on two or more time slots of a time division multiple access frame;
Signal demodulation unit is used for the SCH signal of two above neighbor cells reading is carried out demodulation.
8. device according to claim 7, is characterized in that, described multi-slot reading unit comprises:
The residential quarter determination module be used for to determine will to read in current time division multiple access frame two or more neighbor cells of SCH signal and the assigned timeslot in the described current time division multiple access frame corresponding with described two or more neighbor cells;
Frequency control module, be used for before described assigned timeslot with radio frequency receiver be tuned to the frequency of the neighbor cell corresponding with described assigned timeslot;
Signal reading module is for read the SCH signal of the neighbor cell corresponding with described assigned timeslot at described assigned timeslot.
9. device according to claim 8, it is characterized in that, described residential quarter determination module is used for determining neighbor cell and the corresponding time slot thereof of SCH in described current time division multiple access frame, when there is conflict in two above neighbor cells, select the highest neighbor cell of priority and corresponding time slot thereof.
10. device according to claim 9, is characterized in that, described two above neighbor cells exist conflict be the SCH of two above neighbor cells exist in time overlapping or time interval less than predetermined threshold.
11. device according to claim 9 is characterized in that, the priority of neighbor cell is set according to the frequency of failure and/or the signal strength signal intensity of neighbor cell.
12. device according to claim 7 is characterized in that, also comprises:
Result reports the unit, is used for the demodulation result of SCH signal is reported the upper strata.
13. a mobile terminal comprises the described synchronizing channel monitoring device of any one in claim 7 to 12.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1461155A (en) * | 2002-05-17 | 2003-12-10 | Lg电子株式会社 | Housing estate selecting system and method for radio communication network |
| US20040157601A1 (en) * | 2001-05-16 | 2004-08-12 | Kari Silfverberg | Method for enabling a subscriber entity to actively communicate in a communication network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040157601A1 (en) * | 2001-05-16 | 2004-08-12 | Kari Silfverberg | Method for enabling a subscriber entity to actively communicate in a communication network |
| CN1461155A (en) * | 2002-05-17 | 2003-12-10 | Lg电子株式会社 | Housing estate selecting system and method for radio communication network |
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