WO2012145990A1

WO2012145990A1 - Dual-mode single-antenna terminal and method thereof for radio frequency sharing control

Info

Publication number: WO2012145990A1
Application number: PCT/CN2011/080090
Authority: WO
Inventors: 夏长松; 冉晓龙; 霍继山
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-04-27
Filing date: 2011-09-23
Publication date: 2012-11-01
Also published as: CN102761858A; CN102761858B

Abstract

The present invention provides a method for radio frequency sharing control of a dual-mode single-antenna terminal, comprising: when the Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) performs service receiving, setting a radio frequency point of a Global System of Mobile Communication (GSM) in advance, and starting receiving a GSM signal when the TD-SCDMA gives up the antenna. In the embodiment, when the TD-SCDMA performs the service receiving, the radio frequency point of the GSM is set in advance, so that a local oscillator of the GSM is stabilized in advance, and the stable GSM signal can be received immediately after the TD-SCDMA gives up the antenna, thereby solving the technical problem that in the HSDPA service of the TD-SCDMA, idle time provided by the TD-SCDMA is insufficient for the GSM to perform measurement. The present invention further provides a single-antenna dual-mode terminal.

Description

Dual-mode single-antenna terminal and method for radio frequency sharing control thereof

The present invention relates to the field of mobile communications, and in particular, to a time division synchronous code division multiple access

(TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) and Global System of Mobile Communication (GSM) dual-mode single-antenna terminals and their methods of RF shared control. Background technique

In TD-SCDMA and GSM dual-mode terminals, according to the requirements of the protocol, when one of the systems is used for service transmission, it is necessary to simultaneously monitor another system. For example, when performing service transmission in the TD-SCDMA system, The GSM system monitors (measures, frequency calibration, and base station identity code (BSIC)). If the GSM signal meets the requirements, it will initiate a reselection or handover to the GSM system. To meet this requirement, two sets of independent radios must be used to simultaneously receive GSM and TD-SCDMA radio signals, or the radio frequency devices can be time-multiplexed to receive GSM and TD-SCDMA radio signals, respectively. In order to save costs, the dual-mode terminal in the prior art generally adopts a dual radio frequency, a single antenna, and a shared radio frequency control interface. Since the two systems share the same antenna and the radio frequency control interface, the two systems have an antenna and an RF control interface. The coordination method is very critical. Especially in the high speed downlink packet access (HSDPA) service of the TD-SCDMA system, since the HSDPA service occupies all the dedicated channel time slots, the idle time provided to the GSM is very short, according to the usual radio frequency complex. After removing the RF stabilization time and other overheads, it is not enough to receive a complete GSM time slot, which makes it difficult for GSM to successfully complete measurement, frequency calibration and synchronous reception of BSIC, resulting in low success rate of TD-SCDMA reselection to GSM handover. .

Free time requirements for GSM measurements, frequency calibration, and simultaneous BSIC: The frame structure of GSM is shown in Figure 3. A GSM common control multiframe is 51 frames, each frame has a length of 4.615 milliseconds, and each frame has 8 time slots, each of which is approximately 577 us. In the common control multiframe, the TS0 time slot of each frame is a common control channel, and the common control channels stored in the TS0 time slots of each frame are not completely the same. The distribution of different common control channels in the multiframe is shown in FIG. In the figure, B denotes a broadcast control channel (BCCH, Broadcast Control Channel), F denotes a frequency correction channel (FCCH, Frequency Correction Channel), S denotes a synchronization channel (SCH, Synchronization channel), and C denotes a common control channel (CCCH).

GSM monitoring of the cell is divided into three steps: measurement, receive frequency correction burst (FCB, Frequency Correction Burst) (in FCCH) for frequency calibration, receive synchronous burst sequence (SB) (in SCH) for simultaneous reception BSIC. (For convenience of description, in the following description, it is considered that GSM receives FCB, receives FCCH, and performs frequency calibration for the same task. The GSM receiving SB, receiving the SCH channel, and performing synchronization and BSIC check are considered to be the same task.) GSM Measurement Institute The required idle time is the time of one GSM time slot, that is, 577us, and the 577us signal can be received at any position. The FCB exists in the slot 0 position of frames 0, 10, 20, 30, 40 in each multiframe, because the FCB is used for frequency calibration, and can be used when receiving FCCH channel signals of more than half a slot. Frequency calibration, so frequency calibration can be performed by receiving FCCH channel signals in any of these half-time slots at the location where these FCBs occur. The SB exists in the frame 1, 11, 21, 31, 41 position in each multiframe, and must receive the time slot in which the SB is located in order to receive information such as BSIC and frame number, so the SB reception must be received at these locations. Signal to a full time slot length (577us).

Free time provided by TD-SCDMA:

The frame structure of TD-SCDMA is shown in Figure 2. Generally, TS0 is the time slot in which the common channel is located, DW is the time slot in which the downlink synchronization channel is located, GP is the uplink and downlink interval protection, UP is the time slot in which the uplink synchronization channel is located, and TS1 ~ TS6 are services. Time slot. When receiving services, TS0, DW, UP common channel time slots can be used for measurement and synchronization of TD-SCDMA systems, but not all Use, can be provided to GSM for measurement and other work when idle. The service time slots TS1 - TS6 are used to transmit TD-SCDMA uplink and downlink services. When the service is not full, the remaining idle time slots can be provided to GSM for use. However, in the HSDPA service of TD-SCDMA, TS1 ~ TS6 of each subframe of TD-SCDMA are used for receiving and transmitting HSDPA services, so only the time of TS0, DW, GP, UP of some subframes can be used to provide Measure for GSM.

Assuming that TS0, DW, GP, and UP of TD-SCDMA are provided for GSM measurement, the maximum available idle gap length is: TS0+DW+GAP+UP=675+75+75+125=950us.

The degree of matching between the idle time that TD-SCDMA can provide and GSM requirements:

The reception and transmission of services must be carried out after the RF device is stabilized. Therefore, the idle time provided by TD-SCDMA can remove the time of TD-SCDMA and GSM switching RF and RF stability, etc., in order to synchronize the measurement frequency calibration work of GSM.

The time overhead is: GSM local oscillator stabilization time is 280us, TD-SCDMA local oscillator stabilization time is 70us, bus interface such as serial peripheral interface SPI write delay, RF module other stabilization time is 78us, GSM normal use receiving signal The time is 950-280-70-78=522us, and TD-SCDMA provides idle time in this way, which can not meet the basic requirements of GSM measurement and synchronous reception and reception BSIC: Receive 1 time slot ( 577us ) GSM signal.

The industry usually adopts the following two methods:

a. Two antennas and two RF control interface structures are used. Each system is equipped with a single antenna and a set of RF control interfaces, which increases the cost and volume.

b. Use TD-SCDMA two idle time to complete a task, that is, the first idle time is used to stabilize the RF local oscillator, and the second segment is used for measurement, frequency calibration, and synchronous BSIC, so that the efficiency is relatively low. The rate of cell reselection between systems is relatively slow. Summary of the invention

In view of the above problems in the prior art, the present invention provides a dual mode single antenna terminal and The radio frequency sharing control method can improve the TD-SCDMA standard reselection switching to the GSM standard success rate.

The invention provides a method for dual-mode single-antenna terminal radio frequency sharing control, the method comprising: setting a frequency of a GSM radio frequency in advance when receiving a GSM signal, and GSM when the TD-SCDMA radio frequency repels an antenna The radio starts receiving GSM signals.

Further, the receiving the GSM signal comprises: performing GSM measurement and/or performing FCB reception of GSM.

Further, the performing the GSM measurement comprises:

Step 1: When the GSM measurement is needed, notify the TD-SCDMA controller to report the idle time;

Step 2: TD-SCDMA controller planning TD-SCDMA and GSM occupy the proportion of subframes respectively;

Step 3: The TD-SCDMA controller sends the idle time information provided to the GSM to the master control CPU;

Step 4: The master control CPU starts to set the frequency of the GSM radio before the idle time, and the GSM radio frequency local oscillator starts to stabilize;

Step 5: The GSM radio is used for GSM measurements at the start of the idle time provided by the TD-SCDMA controller.

Further, before the fifth step, the method further comprises: turning off the TD-SCDMA radio at the start position of the idle time.

Further, after the fifth step, the method further comprises: turning off the GSM radio at the end of the idle time, and turning on the TD-SCDMA radio.

Further, the advance amount before the idle time in the fourth step is determined according to the TD-SCDMA controller interaction delay and the RF control advance amount.

Further, the performing FCB reception by using GSM includes: Notifying the TD-SCDMA controller to report the idle time when the FCB reception of the GSM is required;

The TD-SCDMA controller plans the proportion of TD-SCDMA and GSM respectively occupying the subframe; the TD-SCDMA controller sends the idle time information provided to the GSM to the master control CPU; the master control CPU starts to set the frequency of the GSM radio before the idle time Point, the GSM RF local oscillator starts to stabilize;

The GSM radio receives the FCB reception of GSM at the idle time starting position provided by the TD-SCDMA controller.

The present invention provides a single-antenna dual-mode terminal, the dual-mode terminal comprising: a GSM radio frequency, a TD-SCDMA controller, and a master control CPU, wherein: the TD-SCDMA controller is configured to plan and report a received GSM signal The required idle time is given to the master CPU;

The master control CPU is configured to start setting a frequency of the GSM radio frequency before the idle time, so that the GSM radio frequency local oscillator starts to be stable;

The GSM radio frequency is used for receiving GSM signals at the start position of the idle time.

Further, the dual mode terminal further includes a TD-SCDMA radio frequency and an antenna, and the TD-SCDMA radio frequency receives the TD-SCDMA signal through the antenna; and the GSM radio frequency receives the GSM signal through the antenna.

In the embodiment of the present invention, when the single antenna dual-mode terminal performs service reception in the TD-SCDMA system, the radio frequency frequency of the GSM system is set in advance, so that the local oscillator of the GSM is stabilized in advance, and when the TD-SCDMA system is switched to the GSM system. The single antenna can immediately start receiving a stable GSM signal, satisfying the idle time required for GSM measurement during handover, and improving the handover success rate.

DRAWINGS

Figure 1 is a dual-radio single-antenna TD GSM dual-mode mobile phone architecture diagram;

2 is a TD-SCDMA time slot structure diagram; 3 is a schematic diagram of a GSM frame structure;

Figure 4 shows TD-SCDMA idle time reporting and RF control;

Figure 5 shows the timing of the RF control of the GSM pre-stabilized local oscillator. detailed description

The idle time solution required for GSM measurements:

As shown in Figure 1, the dual-radio single-antenna TD-SCDMA and GSM dual-mode terminal architecture diagrams, you can see the relationship of each module and the control and data flow, where the total control CPU 101 and TD-SCDMA controller 105 and GSM hardware accelerator ( The chip) 102 is connected through a connection bus 110, and the TD-SCDMA controller 105 is connected to the TD hardware accelerator (chip) 104 via a connection bus 110, and the dual-mode SPI shared controller 103 is respectively associated with a GSM hardware accelerator (chip) 102 and a TD hardware accelerator ( The chip 104 is connected through the connection bus 110, and is connected to the TD-SCDMA radio 107 and the GSM radio 108 via the SPI bus and the chip select bus 112. The TD-SCDMA radio 107 and the GSM radio 108 are also connected to the antenna 106 via the radio link 111. The antenna 106 is connected to the master CPU 101 via the GPIO interface 109.

The overall control process consists of the following steps:

Step 1: The main control CPU 101 notifies the TD-SCDMA controller 105 to report the idle time when it is required to perform GSM measurement.

For example, as shown in FIG. 4, where L represents the measurement time length in the TD-SCDMA system, P represents the period (4096% P=0), and P=8, that is, 8 TD-SCDMA subframes are one cycle; The master CPU 101 notifies the TD-SCDMA controller 105 to report the idle time within 7 TD-SCDMA subframe times when GSM measurement is required.

The second step: The TD-SCDMA controller 105 plans TS0, DW, GP, UP of how many subframes TD-SCDMA and GSM respectively occupy, that is, how many subframes are used for TD-SCDMA measurement, and how many subframes are provided to GSM. The ratio of TD-SCDMA and GSM occupancy can be determined according to hardware capabilities and measurement requirements. For example, when the measurement capability of TD-SCDMA hardware is weak, the measurement area is relatively large. At that time, TD-SCDMA measurements can account for a larger proportion. As shown in FIG. 4, it can be set that TD-SCDMA occupies 5 subframes, and GSM occupies 3 subframes.

The third step: The TD-SCDMA controller 105 transmits the idle time information supplied to the GSM to the main control CPU 101 in advance. The advance amount is determined according to the TD-SCDMA controller interaction delay and the RF control advance amount, wherein the TD-SCDMA controller interaction delay and the RF control advance amount are determined by the TD-SCMDA network system itself. As shown in FIG. 4, the advance amount is set to 4 subframes in advance, and in the ninth subframe, the TD-SCDMA controller 105 gives 4 times of idle time to the master CPU 101, and 13, 14, 15 of the TD-SCDMA. The TS0, DW, GP, and UP of the frame are used for GSM.

The fourth step: The main control CPU 101 starts to set the frequency of the GSM radio frequency 108 before the idle time provided by the TD-SCDMA controller 105 0.5 TD-SCDMA time slot, and the GSM radio frequency 108 local oscillator starts to stabilize early. If the frequency of the GSM radio frequency 108 is set at 0.5 TD-SCDMA time slot (about 337 us) before the idle time position, the TD-SCDMA radio frequency 108 at the TD-SCDMA time slot before the idle time determines that the SPI radio frequency control interface is not operated, and The 337us is also sufficient to stabilize the GSM local oscillator. In addition, preferably, the GSM radio frequency 108 stabilizes the local oscillator in FIG. 5, and the idle time is the TS0, DW, GP, and UP time slots of the TD-SCDMA subframe N, that is, at the TS0, the TD-SCDMA radio frequency 107 passes the antenna 106, and the GSM radio 108 begins to use the antenna 106; at the end of the UP, the GSM radio 108 leaves the antenna 106 and the TD-SCDMA radio 107 begins to use the antenna 106. In order to ensure that a stable wireless signal can be obtained once the antenna is acquired, GSM starts to set the frequency of the GSM radio frequency 108 before the idle time position, but it is necessary to ensure that the GSM radio frequency 108 starts to set the frequency of the GSM radio frequency 108, the TD-SCDMA radio frequency. The SPI RF control interface will not operate.

The fifth step: the master control CPU 101 starts to set the GSM radio frequency 108 at the idle time start position provided by the TD-SCDMA controller 105, and uses the antenna 106 to receive the GSM signal, performs GSM measurement, etc., at the end of the idle time. Release the antenna for TD-SCDMA.

Step 6: After the TD-SCDMA controller 105 is provided at the end of the idle time, as shown in FIG. At the end of the 15th subframe, the TD-SCDMA radio frequency 107 can be turned on, and the radio frequency during the TS0, DW, GP, and UP time slots can be reused after 16 subframes to resume measurement or synchronization, and TS0, DW, and GP are no longer used. The UP time slot is given out to GSM for use.

Step 7: During the idle time of TD-SCDMA (for example, the 13th, 14th, and 15th subframes in Figure 4), TD-SCDMA gives idle time near TS0 to GSM to receive the signal.

Before the fifth step, the TD controller 105 is further configured to suspend the measurement or synchronization of the TD-SCDMA in the 12th subframe before the RF is released, as shown in FIG. 4, and in subsequent 13, 14, The TD-SCDMA radio frequency 107 is turned off during the TS0, DW, GP, and UP periods of the 15 subframes, and the SPI interface is no longer operated by the TD-SCDMA radio frequency at the start position of the idle time.

After the fifth step, the master CPU 101 turns off the GSM radio and releases the antenna before the end of the idle time provided by the TD-SCDMA controller 105, ensuring that the GSM radio no longer operates the SPI interface until the idle time is over.

If GSM measurements are still required, repeat steps 1 through 7, TD-SCDMA and GSM alternately use RFs near TS0 for a certain period of time until GSM no longer requires idle time. In this way, while TD-SCDMA receives the service, GSM completes the measurement.

The idle time solution required for GSM FCB reception:

The GSM FCB reception is the same as the GSM measurement. It is also necessary to receive the GSM wireless signal through the radio to start the FCB reception. The dual-mode radio frequency multiplexing method in the GSM FCB reception is the same as the dual-mode radio frequency sharing method in the GSM measurement. When the GSM FCB needs to receive, the TD-SCDMA controller 105 is notified to report the idle time, according to the FCB receiving requirement. And the measurement capability of the TD-SCDMA itself, the TD-SCDMA controller 105 allocates the ratio of GSM to TD-SCDMA occupying TS0, and the TD-SCDMA controller 105 reports the idle time to the GSM in a certain period, after the GSM obtains the idle time information, The signal of one time slot is received by the method of stabilizing the local oscillator in advance. details as follows:

Step 1: Inform the TD-SCDMA controller when FCB reception for GSM is required 4 free time on 105;

The second step: TD-SCDMA controller 105 plans the proportion of TD-SCDMA and GSM occupying sub-frames respectively;

The third step: the TD-SCDMA controller 105 sends the idle time information provided to the GSM to the master CPU 101;

The fourth step: The main control CPU 101 starts to set the frequency of the GSM radio frequency 108 before the idle time provided by the TD-SCDMA controller 105, and the GSM radio frequency 108 local oscillator starts to stabilize early.

Step 5: The main control CPU 101 starts to set the GSM radio frequency 108 at the idle time provided by the TD-SCDMA controller 105 to perform FCB reception of the GSM.

Step 6: After the idle time is over, the TD-SCDMA controller 105 turns on the TD-SCDMA radio 107 for use in the TD-SCDMA service time slot.

Step 7: Repeat steps 4 through 6 during the idle time of the TD-SCDMA controller 105.

Before the fifth step, the TD-SCDMA controller 105 is required to suspend the measurement or synchronization of the TD-SCDMA and turn off the TD-SCDMA radio 107 to ensure the start position at the idle time, TD. - The SCDMA RF 107 no longer operates the SPI interface.

After the fifth step, the master control CPU 101 also turns off the GSM radio frequency 108 before the end of the idle time provided by the TD-SCDMA controller 105, and gives up the antenna 106 to ensure that the GSM radio frequency 108 no longer operates the SPI before the idle time ends. interface.

GSM receives the GSM wireless signal one time at a time, and continuously tries to receive the FCCH channel through the sliding window. The idle time window equivalent to the length of one slot slides in the GSM subframe, and tries to receive after a certain time. After that, the signal of the FCCH channel of half a time slot can be received, thereby completing the frequency calibration.

GSM SB reception (BSIC check) required idle time solution:

After attempting to receive the FCB in the above steps, it is necessary to receive the SB. Frame pass through GSM The composition can be seen that the sub-frame where the SB is located is followed by the subframe where the FCB is located. So after finding the FCB, you can know the location of the SB. Although the sliding window may also be received, due to the need to receive a signal of a complete time slot, the probability of completion is relatively low, and the trial time is relatively long, which affects the success rate of the reselection. Based on the location of the SB, the TD-SCDMA controller 105 can be notified to give up the time of the entire subframe to allow the GSM radio to receive the SB. In the worst case, the GSM SB spans the frame boundary of TD-SCDMA. Therefore, for the sake of simplicity, the TD-SCDMA controller 105 can give up the radio frequency of 2 subframes to receive the GSM signal at this position, so that GSM can receive To SB. Since the number of SB receptions due to dual-mode reselection is very limited, the performance of the sacrificed HSDPA is limited.

The specific method is that after the GSM radio receives the FCB, the location of the SB is known, and the GSM radio notifies the TD-SCDMA controller to give up the radio of 2 subframes at the designated position (the location where the SB is located).

The steps are as follows:

First step: By obtaining the position of the FCB of GSM, estimating the position of the SB, and informing the TD-SCDMA controller 105 according to the position of the SB in advance to let the GSM RF 108 receive the SB at the time T1 starts to give up 2 full subframes. . The time T1 is the time at which the TD sub-frame header before the SB start point starts.

Step 2: After receiving the message, the TD-SCDMA controller 105 turns off the measurement, downlink synchronization tracking, automatic frequency tracking, and service reception of the TD-SCDMA before the T1 time, and turns off the TD-SCDMA radio 107.

Step 3: After the start of time T1, the GSM radio 108 is turned on for SB reception, and the GSM radio 108 is turned off before T1+2 frames.

Step 5: After the T1+2 sub-frame, turn on the TD-SCDMA radio 107 to resume TD-SCDMA measurement, downlink synchronization tracking, automatic frequency tracking and service reception.

In this way, the GSM measurement, the reception of the FCB and the SB can be completed at a faster speed by the three methods, thereby improving the success rate of the TD-SCDMA system reselection to the GSM system. The above SPI RF control interface is only an example of a bus interface and can be replaced with other bus interfaces.

In the embodiment of the present invention, the methods for receiving the GSM measurement, the FCB, and the SB are relatively independent, and may be used separately or in combination. For example, the GSM measurement uses the method of the present invention, the reception of the FCB and the SB adopts the prior art method, or the GSM measurement and the FCB adopt the method of the present invention, and the reception of the SB adopts the prior art method and the like.

In the embodiment of the present invention, the problem that the GSM measurement cannot be completed under the HSDPA service of the TD-SCDMA is solved, and the speed of the FCB reception is improved. It also solves the problem that the reception probability of the SB under the HSDPA service of TD-SCDMA is very low or not received. Therefore, the success rate of switching from TD-SCDMA reselection to GSM is improved.

The embodiment of the present invention first attempts to receive the FCB, learns the location of the SB, and then temporarily stops the TD-SCDMA service, and gives the radio of the entire subframe to the GSM for receiving the SB, so that the GSM can quickly receive the SB, thereby improving The success rate of the TD-SCDMA system switching to the GSM system. The embodiment of the invention maximizes the use of a single antenna to complete the service reception of the HSDPA of the TD-SCDMA and the synchronization of the measurement frequency of the GSM, thereby reducing the cost and satisfying the functional performance requirements of the dual-mode terminal, and improving the TD- SCDMA standard reselection to the success rate of the GSM system.

Meanwhile, the present invention also provides a single-antenna dual-mode terminal, including: a GSM radio frequency, a TD-SCDMA controller, and a master control CPU, wherein

The TD-SCDMA controller is configured to report and report the idle time required for receiving the GSM signal to the master control CPU;

GSM radio, used for GSM signal reception at the start of idle time.

Preferably, the TD-SCDMA radio frequency and antenna, the TD-SCDMA radio frequency pass antenna Receiving a TD-SCDMA signal; the GSM radio frequency receives a GSM signal through an antenna.

Of course, the present invention may be embodied in various other various modifications and changes without departing from the spirit and scope of the invention. Changes and modifications are intended to fall within the scope of the appended claims.

Claims

Claim

A method for dual-mode single-antenna terminal radio frequency sharing control, characterized in that the method comprises:

When it is necessary to receive the Global System for Mobile Communications (GSM) signal, the frequency of the GSM radio frequency is set in advance. When the time division synchronous code division multiple access (TD-SCDMA) radio frequency gives up the antenna, the GSM radio frequency starts to receive the GSM signal.

2. The method according to claim 1, wherein the receiving the GSM signal comprises: performing GSM measurement and/or performing GSM frequency correction burst (FCB) reception.

3. The method of claim 2, wherein the performing the GSM measurement comprises:

Step 3: The TD-SCDMA controller sends the idle time information provided to the GSM to the central control CPU (CPU);

4. The method according to claim 3, wherein before the fifth step, the method further comprises: turning off the TD-SCDMA radio frequency at the start position of the idle time.

5. The method according to claim 4, wherein after the fifth step, the method further comprises: turning off the GSM radio at the end of the idle time, and turning on the TD-SCDMA radio.

6. The method according to claim 3, wherein the idle time in the fourth step The amount of advance is determined according to the TD-SCDMA controller interaction delay and the RF control advance.

The method according to claim 2, wherein the performing GSM FCB reception comprises:

Notifying the TD-SCDMA controller to report the idle time when the GSM FCB reception is required;

8. The method according to claim 7, wherein: the method further comprises: determining a position of the synchronization burst sequence (SB) based on the received FCB, and notifying the TD according to the position of the synchronization burst sequence SB. The SCDMA controller begins to yield two subframes at time T1 to receive the GSM signal, where the time T1 is the time at which the TD-SCDMA subframe header before the SB start point begins.

The method according to claim 8, wherein the method further comprises: turning off the TD-SCDMA radio frequency before the time T1;

At the beginning of time T1, the GSM radio is turned on for SB reception, and in the T1+2 subframe, the GSM radio is turned off;

After the T1+2 subframe, the TD-SCDMA radio is turned on to re-accept the TD-SCDMA service.

A single-antenna dual-mode terminal, the dual-mode terminal comprising: a GSM radio frequency, a TD-SCDMA controller, and a master control CPU; wherein the TD-SCDMA controller is used for planning and reporting reception The idle time required for the GSM signal is given to the master control CPU; The master control CPU is configured to start setting a frequency of the GSM radio frequency before the idle time, so that the GSM radio frequency local oscillator starts to be stable;

The single-antenna dual-mode terminal according to claim 10, wherein the dual-mode terminal further comprises a TD-SCDMA radio frequency and an antenna, and the TD-SCDMA radio frequency is received through the antenna.

TD-SCDMA signal; the GSM radio receives a GSM signal through an antenna.