CN100586217C - A method for measuring the second network signal on the double-mode terminal in the first network - Google Patents
A method for measuring the second network signal on the double-mode terminal in the first network Download PDFInfo
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- CN100586217C CN100586217C CN200610072268A CN200610072268A CN100586217C CN 100586217 C CN100586217 C CN 100586217C CN 200610072268 A CN200610072268 A CN 200610072268A CN 200610072268 A CN200610072268 A CN 200610072268A CN 100586217 C CN100586217 C CN 100586217C
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Abstract
The disclosed method for detecting second network signal in the first network by a dual-mode terminal comprises: on the shared area, the dual-mode terminal in the first network detects signal from the second network on idle frame, and the second network does not transmits down pilot frequency continually. This invention can ensure the normal switch during two networks.
Description
Technical field
The present invention relates to communication technical field, be meant especially and a kind ofly guarantee that the dual-mode terminal in first network measures the method for second network signal.
Background technology
From the present third generation (3G) development of Communication Technique, the 3G network first stage of construction must rely on the 2/2.5G existing network, solves coverage rate and roaming problem.Because the 3G network construction needs the time in several years from starting to all standing, be the inevitable demand in market so 3G terminal adopts the design of global mobile communication (GSM) system and 3G bimodulus multifrequency terminal, this also is the common experience of external 3G success.In the area of coverage of 3G, the user not only can obtain the high-speed data service of 3G by dual-mode terminal, but also can obtain the service of voice service, and also temporarily do not have the zone that covers, the service that the user still can utilize existing 2/2.5G network to provide at 3G network.Dual-mode network and dual-mode terminal have not only been built stretching, extension technological means freely for operator, and allow striding forward to 3G that the user can smooth and seamless.And, in present technical specification, stipulated the mode of sub-district gravity treatment, roaming and the switching of GSM/ TD SDMA (TD-SCDMA) dual-mode terminal in TS23, TS25 and the TS44 series of canonical.
TD SDMA (TD-SCDMA) system is based on the technology of time division duplex (TDD), and this system adopts the different time-gap at same frequency channels to receive and transmit data.
The physical channel of TD-SCDMA comprises three-decker: ground floor is a radio frames, and the second layer is a subframe, and the 3rd layer is time slot.A radio frames is 10ms, and each radio frames is divided into the subframe of continuous two 5ms again, and each subframe comprises seven business time-slots and three special time slots again.As shown in Figure 1, the 0th time slot fixed allocation is to descending in seven business time-slots, and the 1st time slot fixed allocation is to up, and remaining time slot can distribute arbitrarily between up-downgoing.Three special time slots of oblique line filling part are respectively descending pilot frequency time slot (DwPTS), uplink pilot time slot (UpPTS), and protection time slot (GP).Wherein, DwPTS is used for sending descending synchronous code, finishes down-going synchronous; UpPTS is used for sending uplink synchronous code, and it is synchronous to finish initial uplink.
In the TD-SCDMA system, DwPCH is in continuous transmit status generally speaking.But, if echo reflection in the consideration reduction networking and telepoint base station down-bound pilot frequency signal postpone the interference to this up access in base station, the TD-SCDMA system can adopt the method that sends DwPCH at interval in certain areas, as: the 5ms odd even sub-frame interval in the 10ms frame sends DwPCH, is referred to as DwPCHBlanking here.This technology is used in the TD-SCDMA system.
Referring to shown in Figure 2, the multi-frame of GSM network is 120ms, comprises TCH FS, SACCH FS and idle frame (Idle frame).Wherein, label 0-11 is TCH FS, and label 12 is SACCHFS, and label 13-24 is TCH FS, and label 25 is Idle frame.In the GSM network, terminal can be measured TD-SCDMA system downlink pilot signal by the Idle frame in the GSM multi-frame or the interior idle time slot of frame, if carrying out GPRS between terminal and the network connects, take up-downgoing and surpass under the situation of a time slot, just can't utilize this moment the interior idle time slot measurement of a frame to have the surveying work of TD-SCDMA system downlink pilot signal all will depend on idle frame in the GSM network.
But, if adopt DwPCH Blanking technology in the TD-SCDMA system, as: the odd even sub-frame interval sends DwPCH, like this, is not all to contain down-bound pilot frequency signal in each subframe in the TD-SCDMA system, i.e. descending synchronous code (SYNC-DL).Therefore, when the GSM/TD-SCDMA dual-mode terminal is operated in the GSM pattern, can increase the measurement of TD-SCDMA system, the difficulty of catching the TD-SCDMA down-bound pilot frequency signal, it is low to measure probability, and then can't guarantee that also dual-mode terminal switches between GSM and TD-SCDMA network normally.
Illustrate, Fig. 3 is the schematic diagram that the GSM/TD-SCDMA dual-mode terminal under the GSM pattern is measured the TD-SCDMA system.TD-SCDMA adopts DwPCH Blanking, and wherein, white box represents not contain the subframe of the TD-SCDMA system of SYNC-DL, and shaded boxes represents to contain the subframe of the TD-SCDMA system of descending synchronous code, the subframe of a TD-SCDMA system of SFN ' expression.As can be seen from Figure 3, under first kind of situation, during the idle frame of GSM multi-frame, can detect label and be 0,24,48,72 subframe, do not contain SYNC-DL in these subframes, so dual-mode terminal can't monitor the descending pilot frequency time slot of TD-SCDMA system, therefore detection failure; Second kind of situation, the GSM multi-frame during idle frame, can detect label and be 1,25,49,73 subframe, contain descending synchronous code in these subframes, detect successfully.
From foregoing description as can be seen, in dual-mode network, for first network, as the GSM network, detect second network at idle frame, as the TD-SCDMA network, if the situation of the discontinuous transmission down-bound pilot frequency signal of second network using, the prior art scheme is not considered the possibly problem that can't measure second network signal of dual-mode terminal under first network schemer that is operated in.Therefore, in this case, the difficulty of down-bound pilot frequency signal that dual-mode terminal detects second network is bigger, if detect the signal less than second network, will cause dual-mode terminal to switch normally between two networks.
Summary of the invention
In view of this, the object of the present invention is to provide and a kind ofly guarantee that the dual-mode terminal in first network measures the method for second network signal, this method detects the signal of second network at the first network idle frame, and under the situation of the discontinuous transmission down-bound pilot frequency signal of second network using, can increase the probability that dual-mode terminal detects second network signal, thereby guarantee that dual-mode terminal switches normally between first network and second network.
In order to achieve the above object, the invention provides and a kind ofly guarantee that the dual-mode terminal in first network measures the method for second network signal, wherein in first network and the common geographic area that covers of second network, dual-mode terminal in first network detects second network signal at idle frame, and this method is:
Second network subsystem is exchanged periodically the subframe order that sends down-bound pilot frequency signal, and wherein said second network is a TD SDMA TD-SCDMA network.
Described first network is a global mobile communication GSM network.
In the zone that second network covers separately, second network subsystem can send down-bound pilot frequency signal continuously, also can divide frame to send down-bound pilot frequency signal.
The time cycle that described exchange sends the subframe order of down-bound pilot frequency signal immobilizes.
The time that described exchange sends the subframe order of down-bound pilot frequency signal is not a fixed value.
Dynamically set the time that described exchange sends the subframe order of down-bound pilot frequency signal according to system load situation or resource situation.
Method of the present invention is by exchanging periodically the order that sends the down-bound pilot frequency signal subframe, increased the probability that the dual-mode terminal of working captures the signal of second network under first network schemer, thereby guaranteed that dual-mode terminal can switch normally between two networks.
Description of drawings
Fig. 1 shows the frame structure schematic diagram of TD-SCDMA system;
Fig. 2 shows the multi-frame structure schematic diagram of GSM network;
Fig. 3 is the schematic diagram that the GSM/TD-SCDMA dual-mode terminal of prior art under the GSM pattern measured the TD-SCDMA system;
Fig. 4 measures the schematic diagram of TD-SCDMA system for the GSM/TD-SCDMA dual-mode terminal under the GSM pattern among the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
At the second network using DwPCH Blanking technology in the existing dual-mode network, dual-mode terminal in first network detects the very big problem of difficulty of second network signal, the present invention adopts in first network and the common geographic area that covers of second network, second network subsystem need be exchanged periodically the subframe order that sends down-bound pilot frequency signal, thereby the probability of second network signal is led in the dual-mode terminal measurement of raising in first network.
In the present invention, dual-mode terminal is a terminal of supporting first network and second network.First network can be the GSM network, and second network can be the TD-SCDMA network.
In the zone that second network covers separately, second network subsystem can send down-bound pilot frequency signal continuously, also can divide frame to send down-bound pilot frequency signal.Here, because in the zone that second network covers separately, no matter whether second network adopts DwPCH Blanking technology, dual-mode terminal all needs to reside in second network, therefore for the situation of continuous transmission or branch frame transmission down-bound pilot frequency signal, dual-mode terminal can both detect.
In the present invention, the time cycle that exchange sends the subframe order of down-bound pilot frequency signal can immobilize, and promptly is always a fixed value, value that also can dynamic change, and this value can dynamically be set according to system's present load situation or resource situation.
Illustrate, when first network is the GSM/GPRS network, when second network is the TD-SCDMA network, in order to solve the problem that existing method can't guarantee to be operated in the normal system of the GSM/TD-SCDMA dual-mode terminal measurements in the GSM/GPRS system, in GSM and the common geographic area that covers of TD-SCDMA, the TD-SCDMA network subsystem is exchanged periodically the subframe order that down-bound pilot frequency signal sends.
As shown in Figure 4, white box represents not contain the subframe of the TD-SCDMA system of down-bound pilot frequency signal, shaded boxes represents to contain the subframe of the TD-SCDMA system of down-bound pilot frequency signal, the subframe of a TD-SCDMA system of SFN ' expression, and down-bound pilot frequency signal is SYNC-DL.Beginning a period of time, the TD-SCDMA network subsystem sends down-bound pilot frequency signal in strange subframe, that is: at label 1, send down-bound pilot frequency signal in 25 the subframe, and in gsm system idle image duration, it is 0 that dual-mode terminal can detect label, 24 subframe, there is not down-bound pilot frequency signal in these two subframes, next, system sends down-bound pilot frequency signal in even subframe, be 48 promptly at label, send down-bound pilot frequency signal in 72 the subframe, can detect label during the idle frame of dual-mode terminal in gsm system like this is 48,72 subframe has also just detected down-bound pilot frequency signal.
Certainly, also can send down-bound pilot frequency signal, next not send down-bound pilot frequency signal, after three subframes, continue to send down-bound pilot frequency signal or the like in continuous two subframes of beginning.
Like this, in GSM and the common zone that covers of TD-SCDMA network, no matter whether the TD-SCDMA system adopts DwPCH Blanking technology, be operated in the down-bound pilot frequency signal that dual-mode terminal under the GSM/GPRS pattern can both measure the TD-SCDMA system, if move in TD-SCDMA network or the independent zone that covers of GSM network and work as this user, can guarantee that terminal measures, thereby can guarantee that dual-mode terminal also can switch normally between these two networks.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (7)
1, a kind ofly guarantees that the dual-mode terminal in first network measures the method for second network signal, wherein in first network and the common geographic area that covers of second network, dual-mode terminal in first network detects second network signal at idle frame, the discontinuous transmission down-bound pilot frequency signal of second network subsystem, it is characterized in that this method is:
Second network subsystem is exchanged periodically the subframe order that sends down-bound pilot frequency signal, wherein
Described second network is a TD SDMA TD-SCDMA network.
2, method according to claim 1 is characterized in that, described first network is a global mobile communication GSM network.
3, method according to claim 1 and 2 is characterized in that, in the zone that second network covers separately, second network subsystem sends down-bound pilot frequency signal continuously.
4, method according to claim 1 and 2 is characterized in that, in the zone that second network covers separately, second network subsystem divides frame to send down-bound pilot frequency signal.
5, method according to claim 1 is characterized in that, the time cycle that described exchange sends the subframe order of down-bound pilot frequency signal immobilizes.
6, method according to claim 1 is characterized in that, the time that described exchange sends the subframe order of down-bound pilot frequency signal is not a fixed value.
7, method according to claim 6 is characterized in that, dynamically sets the time that described exchange sends the subframe order of down-bound pilot frequency signal according to system load situation or resource situation.
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| CN200610072268A CN100586217C (en) | 2006-04-17 | 2006-04-17 | A method for measuring the second network signal on the double-mode terminal in the first network |
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| CN200610072268A CN100586217C (en) | 2006-04-17 | 2006-04-17 | A method for measuring the second network signal on the double-mode terminal in the first network |
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| CN100586217C true CN100586217C (en) | 2010-01-27 |
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| CN101631350B (en) * | 2008-07-17 | 2011-09-21 | 中兴通讯股份有限公司 | Measuring method under WCDMA modes aiming at TD-SCDMA neighboring area |
| CN101951287B (en) | 2010-09-07 | 2015-06-17 | 展讯通信（上海）有限公司 | Receiving conflict overcoming method for multi-card and multi-standby communication terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1516491A (en) * | 2003-01-06 | 2004-07-28 | 西门子（中国）有限公司 | Measurement method between frequencies and between system for making system synchronization in mobile communication system |
| EP1542488A1 (en) * | 2003-12-12 | 2005-06-15 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for allocating a pilot signal adapted to the channel characteristics |
| CN1722896A (en) * | 2004-07-15 | 2006-01-18 | 中兴通讯股份有限公司 | A method of pilot channel configuration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1516491A (en) * | 2003-01-06 | 2004-07-28 | 西门子（中国）有限公司 | Measurement method between frequencies and between system for making system synchronization in mobile communication system |
| EP1542488A1 (en) * | 2003-12-12 | 2005-06-15 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for allocating a pilot signal adapted to the channel characteristics |
| CN1722896A (en) * | 2004-07-15 | 2006-01-18 | 中兴通讯股份有限公司 | A method of pilot channel configuration |
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