CN103024770A - Dual-mode terminal and measuring method thereof - Google Patents
Dual-mode terminal and measuring method thereof Download PDFInfo
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- CN103024770A CN103024770A CN201110289994XA CN201110289994A CN103024770A CN 103024770 A CN103024770 A CN 103024770A CN 201110289994X A CN201110289994X A CN 201110289994XA CN 201110289994 A CN201110289994 A CN 201110289994A CN 103024770 A CN103024770 A CN 103024770A
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Abstract
The invention provides a dual-mode terminal and a measuring method thereof. The measuring method comprises the following steps: in the period of global system for mobile communications (GSM) idle frame or in the period of the last time slot which contains the GSM idle frame and the prior frame of the GSM idle frame, a first data slot of a time division-synchronization code division multiple access (TD-SCDMA) system is acquired; in the period of the idle time slot of a GSM transaction frame, a second data slot of the TD-SCDMA system is acquired; according to the first data slot and the second data slot, the position of the downlink pilot time slot of the TD-SCDMA system is detected; according to the position of the downlink pilot time slot, the training sequence data of the time slot 0 of the TD-SCDMA system is acquired from the first data slot and the second data slot; and according to the training sequence data, the TD-SCDMA system is measured. The measuring method can increase the success rate of the initial search to TD-SCDMA cell.
Description
Technical field
The invention belongs to moving communicating field, when particularly a kind of GSM/TD-SCDMA dual-mode terminal and this dual-mode terminal reside in gsm system, to the method for measurement of TD-SCDMA system.
Background technology
At TD SDMA (Time Division Synchronous Code-Division Multiple Access, TD-SCDMA) with global system for mobile communications (Global System for Mobile Communications, GSM) in the dual-mode wireless communication system, when system resides in GSM, need to measure the TD-SCDMA signal, to obtain the parameters of TD-SCDMA signal, determine whether that according to the parameter that obtains needs switch or the TD-SCDMA system is arrived in gravity treatment.
And measure the position of the descending pilot frequency time slot (DwPTS) that just need to obtain the TD-SCDMA system and training sequence (Midamble) data of time slot 0 (TS0).As shown in Figure 1, under the state of the resident GSM of system, only could grasp the data of TD-SCDMA signal at the free timeslot of GSM.Can only be that the length of this Idle frame is 4.615ms when GSM is for idle (Idle) frame but the TD-SCDMA data segment that can grasp is the longest, and the subframe lengths of TD-SCDMA be 5ms.Because the length of the Idle frame of GSM is less than the subframe lengths of TD-SCDMA, therefore, when system resides in gsm system, just can't obtain a complete TD-SCDMA subframe image duration at Idle, just have like this and might obtain the position of the DwPTS of TD-SCDMA and the Midamble data of time slot 0, thereby cause failure to the TD-SCDMA systematic survey.
Therefore, when system resided in GSM, the problem of how the TD-SCDMA signal being measured need to solve and further research.
Usually the method that adopts in the prior art is to wait for when measuring unsuccessfully, waits until during the next IDLE subframe, again obtains the TD-SCDMA signal, until the TD-SCDMA signal that obtains has comprised the position of DwPTS and the Midamble data of time slot 0.This method obviously is not a kind of good scheme, because the stand-by period can not expect that measuring cost also can be higher.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of dual-mode terminal and method of measurement thereof, when dual-mode terminal resides in gsm system, can in time obtain the position of DwPTS of TD-SCDMA system and the Midamble data of time slot 0, thereby improve the success rate to the TD-SCDMA systematic survey.
For achieving the above object, the invention provides a kind of method of measurement, comprising:
A kind of method of measurement is applied to reside in the dual-mode terminal of gsm system, comprising:
During the GSM idle frame, perhaps, during last time slot of the former frame that comprises described GSM idle frame and described GSM idle frame, obtain one first data slot of TD-SCDMA system;
During the free timeslot of gsm service frame, obtain one second data slot of described TD-SCDMA system;
According to described the first data slot and described the second data slot, detect the position of the descending pilot frequency time slot of described TD-SCDMA system;
According to the position of described descending pilot frequency time slot, from described the first data slot and described the second data slot, obtain the training sequence data of the time slot 0 of described TD-SCDMA system; And
According to described training sequence data described TD-SCDMA system is measured.
Above-mentioned method of measurement, wherein described according to described the first data slot and described the second data slot, detect the position of the descending pilot frequency time slot of described TD-SCDMA system, comprising:
From described the second data slot, extract one the 3rd data slot;
Described the first data slot and described the 3rd data slot are spliced into a TD-SCDMA sub-frame data; And
According to described TD-SCDMA sub-frame data, detect the position of described descending pilot frequency time slot.
Above-mentioned method of measurement, wherein, described position according to described descending pilot frequency time slot from described the first data slot and described the second data slot, obtains the training sequence data of the time slot 0 of described TD-SCDMA system, comprising:
According to the position of described descending pilot frequency time slot, from described TD-SCDMA sub-frame data, obtain described training sequence data.
Above-mentioned method of measurement, wherein:
When the part of the described training sequence data that obtains from described TD-SCDMA sub-frame data is arranged in described the first data slot, when another part is arranged in described the 3rd data slot, then according to the position of described descending pilot frequency time slot, from described the second data slot, obtain described training sequence data.
Above-mentioned method of measurement, wherein, the position relationship of described gsm service frame and described GSM idle frame is:
If the frame number of described GSM idle frame is n, the frame number of so described gsm service frame is n+13*k-9, and wherein, k is integer.
For achieving the above object, the present invention also provides a kind of dual-mode terminal, comprising:
A kind of dual-mode terminal resides in gsm system, comprising:
Data capture unit, be used for during the GSM idle frame, perhaps, during last time slot of the former frame that comprises described GSM idle frame and described GSM idle frame, obtain one first data slot of TD-SCDMA system, during the free timeslot of gsm service frame, obtain one second data slot of described TD-SCDMA system;
Lock unit is used for according to described the first data slot and described the second data slot, detects the position of the descending pilot frequency time slot of described TD-SCDMA system;
The training sequence acquiring unit is used for the position according to described descending pilot frequency time slot, from described the first data slot and described the second data slot, obtains the training sequence data of the time slot 0 of described TD-SCDMA system; And
Measuring unit is used for according to described training sequence data described TD-SCDMA system being measured.
Above-mentioned dual-mode terminal, wherein, described lock unit comprises:
The data pick-up subelement is used for extracting one the 3rd data slot from described the second data slot;
Data splicing subelement is used for described the first data slot and described the 3rd data slot are spliced into a TD-SCDMA sub-frame data; And
Subelement is used for according to described TD-SCDMA sub-frame data synchronously, detects the position of described descending pilot frequency time slot.
Above-mentioned dual-mode terminal, wherein, described training sequence acquiring unit is further used for:
According to the position of described descending pilot frequency time slot, from described TD-SCDMA sub-frame data, obtain described training sequence data.
Above-mentioned dual-mode terminal, wherein, described training sequence acquiring unit is further used for:
When the part of the described training sequence data that obtains from described TD-SCDMA sub-frame data is arranged in described the first data slot, when another part is arranged in described the 3rd data slot, according to the position of described descending pilot frequency time slot, from described the second data slot, obtain described training sequence data.
Above-mentioned dual-mode terminal, wherein, the position relationship of described gsm service frame and described GSM idle frame is:
If the frame number of described GSM idle frame is n, the frame number of so described gsm service frame is n+13*k-9, and wherein, k is integer.
Technique scheme provided by the invention, splice by the free timeslot to gsm system, obtained one section long Measuring Time, with less implementation complexity, solved in GSM and TD-SCDMA dual mode system when the resident GSM of system to the measurement problem of TD-SCDMA parameter, can improve the success rate to the TD-SCDMA initial cell search.
Description of drawings
Fig. 1 is 26 frame multi-frame structure schematic diagrames of gsm system;
Fig. 2 is the subframe structure schematic diagram of TD-SCDMA system;
Fig. 3 is a kind of distribution schematic diagram of uplink and downlink timeslot in the GSM frame;
Fig. 4 is a kind of position relationship schematic diagram of GSM frame and TD-SCDMA subframe;
Fig. 5 is the flow chart according to the method for measurement of the embodiment of the invention;
Fig. 6 be in the method for measurement of the embodiment of the invention the first data slot obtain schematic diagram;
Fig. 7 be in the method for measurement of the embodiment of the invention the second data slot obtain schematic diagram;
Fig. 8 is the splicing schematic diagram of the first data slot and the 3rd data slot in the method for measurement of the embodiment of the invention;
Fig. 9 is the structural representation according to the dual-mode terminal of the embodiment of the invention;
Figure 10 is the structural representation of lock unit in the dual-mode terminal of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
The embodiment of the invention mainly is according to the position relationship between TD-SCDMA subframe and the GSM frame, during the free timeslot (free timeslot and the whole idle frame that comprise traffic frame) of GSM, obtain a plurality of TD-SCDMA data slots, and a plurality of TD-SCDMA data slots that get access to are spliced, so that comprise the Midamble data of DwPTS and the TS0 time slot of TD-SCDMA system in the data that splicing obtains, like this, in most of the cases, in the time of can guaranteeing that dual-mode terminal resides in gsm system, success finish measurement to the TD-SCDMA system.
For ease of better understanding embodiments of the invention, at first the frame structure of gsm system, the subframe structure of TD-SCDMA system and the position relationship between the two are described here.
Fig. 1 shows 26 frame multi-frame structures of gsm system.As shown in Figure 1, gsm system uses the multi-frame structure of 26 frames, and 120 milliseconds of the overall lengths of multi-frame (ms) have an idle frame (seeing the Idle frame among Fig. 1) in per 26 frames, and other frames are busy frame, and the embodiment of the invention is referred to as traffic frame.The frame length of gsm system is 4.615ms (120/26ms), and a GSM frame comprises 8 basic time slots, and the length of each time slot is 4.615/8=0.577ms.
Fig. 2 shows the subframe structure of TD-SCDMA system.As shown in Figure 2; the length of each TD-SCDMA subframe is 5ms; each subframe comprises that 7 length are respectively the business time-slot of 0.675ms, the descending pilot frequency time slot (DwPTS) that length is 0.075ms; protection time slot (GP) and the uplink pilot time slot (UpPTS) that length is 0.125ms that length is 0.075ms; the descending synchronous code (SYNC-UL) that terminal can utilize descending pilot frequency time slot to comprise finds sync bit, and broadcast channel (BCH) is always carried by the first two code channel on the TS0.In addition, including length in each business time-slot is the Midamble data of 0.112ms, is used for carrying out channel estimating and relevant measurement.
Fig. 3 is a kind of distribution schematic diagram of uplink and downlink timeslot in the GSM frame.As shown in Figure 3, in a GSM frame, reception takies a time slot, transmission takies 4 time slots, and reception and transmission differ two time slots, can find out, under this kind situation, include two continuous free timeslots (time slot 1 and time slot 2, in the embodiment of the invention, various sequence numbers are all from 0 open numbering) in each non-Idle frame.
In addition, among Fig. 3, need to send at the time slot 6 of GSM the 24th frame, need to receive at the time slot 0 of GSM the 0th frame, therefore last time slot of the former frame of Idle frame also is free timeslot, and this free timeslot has consisted of 9 continuous free timeslots with the Idle frame.These 9 continuous free timeslot length are 9/8*4.615ms=5.19ms; consider handover delay; two segment protect fragments before and after need to removing (length of protected fragment is determined according to the radiofrequency characteristics of receiver); therefore can be lower than 5.19ms to the time that the TD-SCDMA signal receives, and in most of the cases be lower than 5ms.
Owing to the TD-SCDMA system is successfully measured, need to obtain the position of the DwPTS of TD-SCDMA, and therefore the Midamble data on the TS0, for guaranteeing to measure successfully, should be obtained the TD-SCDMA data of 5ms at least.And according to above-mentioned analysis; the busy frame of each of GSM all has the time slot of two free time; length is 1.154ms; remove protected fragment even consider handover delay; these two free timeslots and aforesaid 9 continuous free timeslots are spliced; perhaps directly splice with aforesaid idle frame, spliced length can satisfy the measurement demand to the TD-SCDMA system also all greater than 5ms.
In addition, in the multi-frame that 26 GSM frames consist of, automatic gain control (AGC) value is constant, the TD-SCDMA data that therefore can splice 5ms
Need to prove that Fig. 3 only is a kind of distribution condition of uplink and downlink timeslot in the GSM frame, in fact, various distribution condition of the prior art can guarantee that all two continuous free timeslots are arranged in the busy frame of GSM.And, no matter take which kind of method of salary distribution, last time slot of the former frame of GSM idle frame always is free timeslot.
Fig. 4 is a kind of position relationship schematic diagram of GSM frame and TD-SCDMA subframe.In Fig. 4, GSM frame and TD-SCDMA subframe are to send at one time, can find out, and be every through 13 GSM frames or 12 TD-SCDMA subframes, and GSM can keep again aliging with the time slot of TD-SCDMA.
The description of following examples all is based on distribution condition shown in Figure 3 and position relationship shown in Figure 4, comprises wherein time slot sequence number and frame (subframe) sequence number.If poor if having time between the transmission of GSM and TD-SCDMA, perhaps, uplink and downlink timeslot is other distribution condition, also can realize according to similar method.
With reference to Fig. 5, the method for measurement of the embodiment of the invention is applied to reside in the dual-mode terminal of gsm system to the measurement of TD-SCDMA system, mainly comprises the steps:
Step 501: during the GSM idle frame, obtain one first data slot of TD-SCDMA system;
Preferably, during last time slot of the former frame that comprises described GSM idle frame and described GSM idle frame, obtain described the first data slot.
As shown in Figure 6, for continuous 9 free timeslots that comprise the GSM idle frame, length is 5.191875ms, and two segment protect fragments before and after removing receive the TD-SCDMA signal in the meantime, obtain described the first data slot.
Particularly, the TD-SCDMA signal that can receive is the 7.7th (70% position of the 7th the time slot) time slot from the 7.3rd time slot of the 24th frame of GSM (30% position of the 7th time slot) to the 25th frame, then, therefrom extract the signal segment of 0.05ms-4.85ms, obtaining length is described the first data slot of 4.8ms.Wherein, 7.3 and 7.7 is determined according to the radiofrequency characteristics of receiver, certainly, for different radiofrequency characteristicses, also can get other different values.
Step 502: during the free timeslot of gsm service frame, obtain one second data slot of described TD-SCDMA system;
As shown in Figure 7; when the Idle of GSM frame is the 25th frame; position relationship according to GSM frame and TD-SCDMA subframe; get two free timeslots (time slot 1 and time slot 2) of the 16th frame of GSM; two segment protect fragments before and after removing; receive in the meantime the TD-SCDMA signal, obtain described the second data slot.Wherein, the length sum of described the first data slot and described the second data slot is more than or equal to 5ms, and in the present embodiment, the length of described the second data slot is 0.675ms, just equals the length of a time slot of a TD-SCDMA subframe.For example, get the 0.225-0.9ms of these two free timeslots as described the second data slot.
According to the sequential relationship between idle frame and the traffic frame, also might first execution in step 502, rear execution in step 501.Therefore, the embodiment of the invention does not limit the execution sequence of step 501 and step 502.
Step 503: according to described the first data slot and described the second data slot, detect the position of the descending pilot frequency time slot of described TD-SCDMA system;
In this step, can splice described the first data slot and described the second data slot, from spliced data slot, detect the position of DwPTS.
Preferably, can also utilize the position relationship between GSM frame and the TD-SCDMA subframe, from shown in extract one the 3rd data slot the second data slot, described the 3rd data slot and described the first data slot are spliced, thereby guarantee to form the TD-SCDMA sub-frame data (as shown in Figure 8) of a 5ms, then, detect the position of DwPTS according to this TD-SCDMA sub-frame data.Because the DwPTS of the different subframes of same TD-SCDMA residential quarter is identical, so just can detect the position of DwPTS from the TD-SCDMA sub-frame data of 5ms.
In Fig. 8, from the second data slot of 0.225-0.9ms, to extract the data of 0.418-0.618ms wherein as described the 3rd data slot, the length of described the 3rd data slot is 0.2ms, and the 0.2ms data slot is spliced after aforesaid 4.8ms data slot.In fact, also can be with this 0.2ms data slot splicing before aforesaid 4.8ms data slot, this can't affect the detection to the DwPTS position.
Step 504: according to the position of described descending pilot frequency time slot, from described the first data slot and described the second data slot, obtain the training sequence data of the time slot 0 of described TD-SCDMA system;
Because the length of the first data slot and the second data slot is afterwards greater than 5ms, therefore, according to the position of the architectural feature of the position relationship between GSM frame and the TD-SCDMA frame, TD-SCDMA frame and the DwPTS that detects, just get access to easily the Midamble data of TS0.
Step 505: described TD-SCDMA system is measured according to described training sequence data.
Generally speaking, after getting access to the Midamble data of TS0, just can be according to these Midamble data, measure the signal strength signal intensity of TS0 the first two code channel, with the signal strength signal intensity sum of these two code channels signal strength signal intensity as the TD-SCDMA adjacent cell.In fact, according to these Midamble data, can also measure other projects that need to measure, not enumerate one by one here.
The said method of the embodiment of the invention, in step 504, the TD-SCDMA subframe that can also be directly obtains according to splicing in the step 503 and the position of DwPTS obtain the Midamble data of TS0.Need to prove, the Midamble data that obtain in this manner, it might a part be arranged in described the first data slot, another part is arranged in described the 3rd data slot, namely be arranged in two TD-SCDMA subframes, and the Midamble of the TS0 of the different subframes of same TD-SCDMA residential quarter may be not identical, and the Midamble data that obtain with this kind mode are in this case measured, and measurement result is accurate not enough.Therefore, preferably, in such cases, can utilize the length of position, first data slot and second data slot of DwPTS in the first data slot and the correlation between TD-SCDMA subframe and the GSM subframe, from the second data slot, extract the Midamble data of time slot 0.
Belong to the concrete judgment mode of different subframe below for the Midamble data of output time slot 0, and, when determining that it belongs to different subframe, obtain the method for the Midamble data of a complete time slot 0, so-called " complete " refers to that described Midamble data come from same TD-SCDMA subframe herein.
Suppose that the position of DwPTS head in the 5ms TD-SCDMA subframe that splicing obtains is L ms, so, the condition of Midamble data that the TD-SCDMA subframe that obtains of splicing does not comprise complete time slot 0 is as follows:
(1) suppose that the 0.2ms data slot is connected to before the data slot of 4.8ms, condition is 0.4875ms＜L＜0.6ms or 0.2875ms＜L＜0.4ms so;
(2) data slot of supposing 0.2ms is connected to after the data slot of 4.8ms, and condition is 0.2875ms＜L＜0.4ms or 0.0875ms＜L＜0.2ms so;
Correspondingly, it is as follows to obtain the method for Midamble data of a complete time slot 0:
(1) suppose that the 0.2ms data slot is connected to before the data slot of 4.8ms, the position of the Midamble data of so complete time slot 0 in described the second data slot is L-0.21875ms～L-0.10675ms;
(2) suppose that the 0.2ms data slot is connected to before the data slot of 4.8ms, the position of the Midamble data of so complete time slot 0 in described the second data slot is L-0.01875ms～L+0.09325ms.
Corresponding to above-mentioned method of measurement, the embodiment of the invention also provides a kind of dual-mode terminal.
With reference to Fig. 9, the dual-mode terminal of the embodiment of the invention resides in gsm system, comprises data capture unit 10, lock unit 20, training sequence acquiring unit 30 and measuring unit 40.Wherein:
As shown in Figure 6, the TD-SCDMA signal that can receive is the 7.7th time slot from the 7.3rd time slot to the 25 frames of the 24th frame of GSM, then described data capture unit 10 can therefrom extract the signal segment of 0.05ms-4.85ms, and obtaining length is described the first data slot of 4.8ms.
As shown in Figure 7; when the Idle of GSM frame is the 25th frame; position relationship according to GSM frame and TD-SCDMA subframe; get two free timeslots (time slot 1 and time slot 2) of the 16th frame of GSM; two segment protect fragments before and after removing; described data capture unit 10 obtains the TD-SCDMA signal in the meantime, obtains described the second data slot.Wherein, the length sum of described the first data slot and described the second data slot is more than or equal to 5ms.
Preferably, can also utilize the position relationship between GSM frame and the TD-SCDMA subframe, from shown in extract one the 3rd data slot the second data slot, described the 3rd data slot and described the first data slot are spliced, thereby assurance can form the TD-SCDMA sub-frame data of a 5ms.At this moment, described lock unit 20 specifically comprises:
Data pick-up subelement 21 is used for extracting one the 3rd data slot from described the second data slot;
Training sequence acquiring unit 30 is used for the position according to described descending pilot frequency time slot, from described the first data slot and described the second data slot, obtains the training sequence data of the time slot 0 of described TD-SCDMA system.Because the length of the first data slot and the second data slot is afterwards greater than 5ms, therefore, according to the position of the architectural feature of the position relationship between GSM frame and the TD-SCDMA frame, TD-SCDMA frame and the DwPTS that detects, just get access to easily the Midamble data of TS0.
Measuring unit 40 is used for according to described training sequence data described TD-SCDMA system being measured.Generally speaking, after getting access to the Midamble data of TS0, just can be according to these Midamble data, measure the signal strength signal intensity of TS0 the first two code channel, with the signal strength signal intensity sum of these two code channels signal strength signal intensity as the TD-SCDMA adjacent cell.In fact, according to these Midamble data, can also measure other projects that need to measure.
Wherein, the position relationship of described gsm service frame and described GSM idle frame is: if the frame number of described GSM idle frame is n, the frame number of so described gsm service frame is n+13*k-9, and k is integer, and for example, the k value is-1,0,1 or 2.
Preferably, described training sequence acquiring unit 30 can also according to the position of described descending pilot frequency time slot, obtain described training sequence data from described TD-SCDMA sub-frame data.And, when the part of the described training sequence data that obtains from described TD-SCDMA sub-frame data is arranged in described the first data slot, when another part is arranged in described the 3rd data slot, then according to the position of described descending pilot frequency time slot, from described the second data slot, obtain described training sequence data.
In sum, the technique scheme of the embodiment of the invention, splice by the free timeslot to gsm system, with less implementation complexity, solved in GSM and TD-SCDMA dual mode system when the resident GSM of system to the measurement problem of TD-SCDMA parameter, can improve the success rate to the TD-SCDMA initial cell search.
Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spiritual scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. method of measurement is applied to reside in the dual-mode terminal of gsm system, it is characterized in that, comprising:
During the GSM idle frame, perhaps, during last time slot of the former frame that comprises described GSM idle frame and described GSM idle frame, obtain one first data slot of TD-SCDMA system;
During the free timeslot of gsm service frame, obtain one second data slot of described TD-SCDMA system;
According to described the first data slot and described the second data slot, detect the position of the descending pilot frequency time slot of described TD-SCDMA system;
According to the position of described descending pilot frequency time slot, from described the first data slot and described the second data slot, obtain the training sequence data of the time slot 0 of described TD-SCDMA system; And
According to described training sequence data described TD-SCDMA system is measured.
2. method of measurement as claimed in claim 1 is characterized in that, and is described according to described the first data slot and described the second data slot, detects the position of the descending pilot frequency time slot of described TD-SCDMA system, comprising:
From described the second data slot, extract one the 3rd data slot;
Described the first data slot and described the 3rd data slot are spliced into a TD-SCDMA sub-frame data; And
According to described TD-SCDMA sub-frame data, detect the position of described descending pilot frequency time slot.
3. method of measurement as claimed in claim 2 is characterized in that, described position according to described descending pilot frequency time slot from described the first data slot and described the second data slot, obtains the training sequence data of the time slot 0 of described TD-SCDMA system, comprising:
According to the position of described descending pilot frequency time slot, from described TD-SCDMA sub-frame data, obtain described training sequence data.
4. method of measurement as claimed in claim 3 is characterized in that:
When the part of the described training sequence data that obtains from described TD-SCDMA sub-frame data is arranged in described the first data slot, when another part is arranged in described the 3rd data slot, then according to the position of described descending pilot frequency time slot, from described the second data slot, obtain described training sequence data.
5. such as each described method of measurement in the claim 1 to 4, it is characterized in that the position relationship of described gsm service frame and described GSM idle frame is:
If the frame number of described GSM idle frame is n, the frame number of so described gsm service frame is n+13*k-9, and wherein, k is integer.
6. a dual-mode terminal resides in gsm system, it is characterized in that, comprising:
Data capture unit, be used for during the GSM idle frame, perhaps, during last time slot of the former frame that comprises described GSM idle frame and described GSM idle frame, obtain one first data slot of TD-SCDMA system, during the free timeslot of gsm service frame, obtain one second data slot of described TD-SCDMA system;
Lock unit is used for according to described the first data slot and described the second data slot, detects the position of the descending pilot frequency time slot of described TD-SCDMA system;
The training sequence acquiring unit is used for the position according to described descending pilot frequency time slot, from described the first data slot and described the second data slot, obtains the training sequence data of the time slot 0 of described TD-SCDMA system; And
Measuring unit is used for according to described training sequence data described TD-SCDMA system being measured.
7. dual-mode terminal as claimed in claim 6 is characterized in that, described lock unit comprises:
The data pick-up subelement is used for extracting one the 3rd data slot from described the second data slot;
Data splicing subelement is used for described the first data slot and described the 3rd data slot are spliced into a TD-SCDMA sub-frame data; And
Subelement is used for according to described TD-SCDMA sub-frame data synchronously, detects the position of described descending pilot frequency time slot.
8. dual-mode terminal as claimed in claim 7 is characterized in that, described training sequence acquiring unit is further used for:
According to the position of described descending pilot frequency time slot, from described TD-SCDMA sub-frame data, obtain described training sequence data.
9. dual-mode terminal as claimed in claim 8 is characterized in that, described training sequence acquiring unit is further used for:
When the part of the described training sequence data that obtains from described TD-SCDMA sub-frame data is arranged in described the first data slot, when another part is arranged in described the 3rd data slot, according to the position of described descending pilot frequency time slot, from described the second data slot, obtain described training sequence data.
10. such as each described dual-mode terminal in the claim 6 to 9, it is characterized in that the position relationship of described gsm service frame and described GSM idle frame is:
If the frame number of described GSM idle frame is n, the frame number of so described gsm service frame is n+13*k-9, and wherein, k is integer.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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