WO2007147337A1

WO2007147337A1 - A dual-mode wireless terminal and a method for performing two kinds of communication modes simultaneously

Info

Publication number: WO2007147337A1
Application number: PCT/CN2007/001868
Authority: WO
Inventors: Xialin Zhang; Xuejun Zhang
Original assignee: Lenovo (Beijing) Limited
Priority date: 2006-06-13
Filing date: 2007-06-13
Publication date: 2007-12-27
Also published as: CN101090565B; CN101090565A

Abstract

A dual-mode wireless terminal with two kinds of communication modes is provided, and a method for performing two kinds of communication modes simultaneously is also provided. In said two kinds of communication modes, the first communication mode and the second communication mode are both in standby state. The method includes: powering off the transmitter in the second communication mode, when the first communication mode entering communication state; and powering on the transmitter in the second communication mode, when the first communication mode terminating communication. The method further includes: powering off the network searching function of the first communication mode, when the second communication mode entering communication state; and powering on the network searching function of the first communication mode, when the second communication mode terminating communication. The dual-mode wireless terminal of present invention and the method thereof eliminate the radio frequency interference which imposed by one kind of communication mode to another kind of communication mode, when performing two kinds of communication modes simultaneously.

Description

Dual-mode wireless terminal and method for simultaneously operating two communication modes

Technical field

The present invention relates to a dual mode wireless terminal having dual mode and a method of operating a dual mode in a dual mode wireless terminal, and more particularly to being able to operate in different wireless communication systems and eliminating radio frequency interference between different modes of wireless communication systems Dual mode wireless terminal and method for simultaneously operating different working modes in a dual mode wireless terminal. Background technique

+ With the rapid development of the communications industry, mobile communications consumption is no longer limited to a single carrier, a single network, and pure voice services. At present, the diversification of communication choices has gradually become a trend. The dual-mode wireless terminal can operate in different modes of wireless communication systems, such as Global System for Mobile Communications (GSM) mode and Code Division Multiple Access (CDMA) mode, and can quickly switch modes according to the status of different networks or the user's choice. , to meet the needs of users of diverse communications.

The existing dual-mode wireless terminal has two implementation modes, one is a dual communication mode switching operation mode, and the other is a dual communication mode independent operation mode. In the dual communication mode switching mode, only one communication mode is running at the same time. That is, when one communication mode is in the communication state, the other communication mode is in the off state. If it is necessary to switch to another communication mode, it is necessary to utilize the switching mode and the flow regulation between the communication protocols related to the two communication modes, and perform mode switching under the cooperation of the network side, and the implementation manner is complicated.

In the dual communication mode independent operation mode, the two communication modes can stand by at the same time, that is, the two communication modes operate simultaneously, and receive broadcast and call messages of the respective network sides. The dual communication mode independent operation mode does not require the cooperation on the network side, and the implementation is simple.

However, for the dual communication mode independent operation mode, when the frequency bands of the two communication modes are close, since the transmission signal hardly undergoes spatial attenuation, it is much stronger than the received signal, causing the transmission in one mode to another mode. Subsequent reception produces severe RF interference.

For example, for dual-mode wireless terminals with GSM and CDMA communication modes, in China, since the CDMA mode uses a frequency band of 825 - 835 MHz (upstream) 1 870 - 880 MHz (downstream), the GSM mode is used. The frequency bands are 885 - 915 MHz (upstream) / 930-960 MHz (downstream) and 1710 - 1755 MHz (upstream) / 1805 - 1850 MHz (downstream), CDMA downlink frequency band 870 - 880 MHz and GSM uplink frequency band 885 - The 915 MHz is very close, so the uplink transmission of the GSM communication device will cause radio frequency interference to the downlink reception of the CDMA communication device. One way to enable GSM and CDMA to operate simultaneously is to use only the 1710 - 1755 MHz (upstream) / 1805 - 1850 MHz (downstream) band for GSM communication devices. However, in China, the GSM mode uses a frequency range of 885 - 915 MHz (upstream > 930 - 960 MHz (downstream). The network quality and coverage is much better than 1710 - 1755 MHz (upstream) I 1805 - 1850 MHz (downstream) The frequency band, limiting the frequency band used by the GSM mode to 1710 - 1755 MHz (upstream) 1 1805 - 1850 MHz (downstream) will impose significant limitations on the use of dual-mode wireless terminals.

It is an object of the present invention to provide a dual mode wireless terminal having a dual communication mode and a method of operating a dual communication mode in a dual mode wireless terminal capable of operating in different wireless communication systems and eliminating inter-radio communication systems of different modes Radio frequency interference.

According to an aspect of the present invention, a method for operating a dual communication mode in a dual mode wireless terminal having a dual communication mode is provided, comprising the steps of: the first communication mode and the second communication mode of the dual communication mode are simultaneously standby; When the first communication mode enters the communication state, the transmitter of the second communication mode is turned off, and when the communication of the first communication mode ends, the transmitter of the second communication mode is activated.

Preferably, the method further comprises: turning off the network search function of the first communication mode when the second communication mode enters the communication state, and turning on the network search function of the first communication mode when the communication is ended in the second communication mode.

Preferably, the method further comprises: when the dual mode wireless terminal starts up, first starting the second communication mode, and then starting the first communication mode; when the dual mode wireless terminal is turned off, first closing the first communication mode, and then Turn off the second communication mode.

Preferably, the first communication mode is a code division multiple access (CDMA) communication mode, and the second communication mode is a Global System for Mobile Communications (GSM) communication mode.

According to another aspect of the present invention, a dual mode wireless terminal having a dual communication mode is provided, the dual mode wireless terminal comprising:

a first communication device, configured to perform communication in a first communication mode; a second communication device, configured to perform communication in the second communication mode;

a control device, configured to detect an operating state of the first communication device and the second communication device,

Wherein the first communication device and the second communication device stand by at the same time, the control device sends an instruction to turn off the transmitter to the second communication device when detecting that the first communication device enters the communication state, and detects the first When the communication device ends the communication, transmitting an instruction to turn on the transmitter to the second communication device, the second communication device turns off the transmitter of the device according to the received instruction to turn off the transmitter, and according to the received instruction to turn on the transmitter Turn on the transmitter of this unit. '

Preferably, the control device detects the working state of the second communication device, and when detecting that the second communication device enters the communication state, sends a close network search command to the first communication device, and detects the communication of the second communication device. At the end, an instruction to send a network search function to the first communication device is sent;

The first communication device turns off the network search function of the device according to the received instruction to close the network search, and starts the network search function of the device according to the received instruction to turn on the network search.

Preferably, the control device is further configured to activate the second communication device when the dual mode wireless terminal is started, and then activate the first communication device.

Preferably, the control device is further configured to turn off the first communication device and then turn off the second communication device when the dual mode wireless terminal is turned off.

Preferably, the first communication is a CDMA communication device, and the second communication device is a GSM communication device.

Compared with the prior art, the beneficial effects of the present invention are:

1) The two communication modes of the dual-mode wireless terminal in the dual communication mode are standby at the same time. When one communication mode enters the communication state, the other communication mode is turned off without generating radio frequency interference. When the communication mode ends communication, another communication mode is turned on.

2) When one communication mode enters the communication state, the other communication mode does not perform network search, thereby reducing power consumption. '

3) No network side cooperation is required, and the implementation is simple. DRAWINGS

1 is a schematic diagram of a method for simultaneously operating a GSM and CDMA communication mode in a dual mode wireless terminal having a GSM/CDMA dual communication mode according to an embodiment of the present invention; 2 is a schematic diagram of a dual mode wireless terminal having a GSM/CDMA dual communication mode in accordance with an embodiment of the present invention. detailed description

In order to facilitate a better understanding of the present invention, a working principle of a conventional wireless terminal having a communication mode will be briefly introduced. A wireless terminal typically includes a control device, a transmitter, and a receiver. When the wireless terminal is in standby, the receiver periodically receives the signal of the network broadcast. If the broadcast signal is not received, or the signal strength is lower than the threshold, the control device starts the network search function, and notifies the receiver of the frequency band in which the wireless terminal operates. Search for network signals within. When the receiver searches for a network signal and the signal strength reaches a threshold, it resides in the cell in which it is located. When the wireless terminal enters the communication state, for example, when entering a call state, transmitting or receiving a short message state, or entering a packet service state, it generates a signal through the transmitter and receives a signal through the receiver.

According to the present invention, in a dual mode wireless terminal having a dual communication mode, both communication modes are simultaneously in a standby state. When a communication mode enters the communication state, the transmitter of the other communication mode is turned off according to the relationship of the two communication modes, or the network search function of the other communication mode is turned off.

Specifically, the first communication mode and the second communication mode in the dual mode wireless terminal having the dual communication mode stand by at the same time. If the downlink frequency band of the first communication mode and the uplink frequency band of the second communication mode are close, the uplink transmission of the second communication mode may cause radio frequency interference to the downlink reception of the first communication mode. When the first communication mode enters the communication state, the transmitter of the second communication mode is turned off until the first communication mode ends the communication, and then the transmitter of the second communication mode is turned on. When the second communication mode enters the communication state, the network search function of the first communication mode is turned off until the second communication mode ends the communication, and then the network search function of the second communication mode is turned on.

The method of the present invention will be described in detail below by taking a dual mode wireless terminal having a GSM and CDMA communication mode as an example, and in conjunction with FIG. The CDMA mode may be the first communication mode described above, and the GSM mode may be the second communication mode.

1. Dual mode wireless terminal startup

When the dual-mode wireless terminal is powered on, it is first checked whether it is necessary to start the two communication modes in a standby mode. If so, the two communication modes are activated separately. In general, the startup sequence of the communication mode can be arbitrarily set. In this embodiment, it is preferable to start the GSM mode first, and after the GSM mode enters the standby state, start the CDMA mode.

As described in the background, the uplink frequency band used in the GSM mode and the downlink frequency band used in the CDMA mode Closer. Therefore, the uplink transmission of the GSM mode affects the downlink reception of the CDMA mode, and the uplink transmission of the CDMA mode does not affect the downlink reception of the GSM mode. If the CDMA mode is started first and then the GSM mode is started, since the transmission power at the time of startup is large, the uplink transmission of the GSM mode may interfere with the downlink reception of the CDMA mode, causing the dual-mode wireless terminal operating in the CDMA mode to lose contact with the base station. In this case, the CDMA mode needs to re-search the network, resulting in a large power consumption.

2. Enter the communication state

In this case, there are two cases, one is that the GSM mode enters the communication state, and the other is that the CDMA mode enters the communication state.

CDMA mode enters communication state:

As described above, the uplink transmission of the GSM communication device interferes with the downlink reception of the CDMA communication device. At this time, the transmitter of the GSM communication device can be turned off, and after the CDMA communication device ends the communication, the transmitter of the GSM mode is turned on.

GSM mode enters communication state -

After the GSM communication device enters the communication state, its uplink transmission is in working state, causing radio frequency interference to the downlink reception of the CDMA communication device, and the CDMA communication device easily loses contact with the base station, and the CDMA communication device continuously searches the network, so that the CDMA communication device continuously searches for the network. The power is very large. By turning off the network search function of the CDMA communication device, the CDMA communication device is temporarily stopped from searching the network to avoid unnecessary power consumption. After the GSM communication device ends the communication, the network search function of the CDMA communication device is turned on, and after receiving the base station signal, the CDMA communication device re-enters the standby state.

3. Dual mode wireless terminal is turned off

Since the dual mode wireless terminal transmits the shutdown information to the network side during shutdown, in order to prevent the uplink transmission of the GSM communication device from interfering with the downlink reception of the CDMA communication device, the preferred method is to first turn off the CDMA communication device, and then turn off the GSM communication device.

By this method, two communication modes in the dual-mode wireless terminal stand by at the same time, there is no radio frequency interference between the two communication modes, and the GSM mode can be extended by using the 885-915 MHz (upstream) / 930 - 960 MHz (downlink) frequency band. The scope of application of the dual mode terminal.

This embodiment illustrates a dual mode terminal having a GSM and CDMA communication mode, and the method is equally applicable to other similar dual mode wireless terminals. In addition, the method is also applicable to a multimode terminal having multiple communication modes, and when there is radio frequency interference between any two modes in the multimode terminal, the method of the present invention can be referred to. The technical solution of the law.

According to the method described above, the dual mode terminal of the present invention having two communication modes is described below in conjunction with FIG. As shown in FIG. 2, the dual mode terminal of the present invention includes a first communication device and a second communication device. After the dual-mode wireless terminal is powered on, the first communication device and the second communication device stand by at the same time, and the uplink transmission of the second communication device causes radio frequency interference to the downlink reception of the first communication device, and the dual-mode wireless terminal further includes a control unit. And detecting the working state of the first communication device, sending an instruction to turn off the transmitter to the second communication device when detecting that the first communication device enters the communication state; and detecting that the communication of the first communication device ends Transmitting, to the second communication device, an instruction to turn on the transmitter to the second;

The second communication device is further configured to turn off the transmitter of the device according to the received instruction to turn off the transmitter; and turn on the transmitter of the device according to the received command to turn on the transmitter.

Further, the control device is further configured to detect an operating state of the second communication device, and when detecting that the second communication device enters a communication state, send an instruction to close the network search to the first communication device; and detect the second communication device At the end of the communication, sending an instruction to start the network search to the first communication device;

The first communication device further turns off the network search function of the device according to the received instruction to turn off the network search function; and starts the network search function of the module according to the received instruction to turn on the network search function.

As described in the foregoing method, when the dual mode wireless terminal is started, the control unit starts the second communication device and then starts the first communication device; when the dual mode terminal is turned off, the control device first turns off the first communication device, and then turns off the second device. Through device

A specific example of the dual mode wireless terminal of the present invention is a dual mode terminal having a GSM and CDMA communication mode, wherein the CDMA communication device is the first communication device described above, and the GSM communication device is the second communication device described above.

It should be understood by those skilled in the art that the above-described embodiments are merely illustrative of the scope of the invention and should not be construed as limiting.

Claims

A method of operating a dual communication mode in a dual mode wireless terminal having a dual communication mode, comprising the steps of:

The first communication mode and the second communication mode of the dual communication mode are simultaneously standby;

Turning off the transmitter of the second communication mode when the first communication mode enters the communication state; and

At the end of the communication of the first communication mode, the transmitter of the second communication mode is activated.

2. The method according to claim 1, further comprising: turning off the network search function of the first communication mode when the second communication mode enters the communication state, and turning on the first communication mode when the communication is ended in the second communication mode The steps of the web search function.

3. The method of claim 1 wherein when the dual mode wireless terminal is initiated, the second communication mode is initiated and then the first communication mode is initiated.

4. The method of claim 1 wherein when the dual mode wireless terminal is turned off, the first communication mode is turned off and then the second communication mode is turned off.

The method according to any one of claims 1 to 4, wherein

The first communication mode is a Code Division Multiple Access (CDMA) communication mode and the second communication mode is a Global System for Mobile Communications (GSM) communication mode.

6. A method of operating a dual communication mode in a dual mode wireless terminal having a dual communication mode, comprising the steps of:

When the second communication mode enters the communication state, the network search function of the first communication mode is turned off; and when the communication of the second communication mode ends, the network search function of the first communication mode is turned on.

7. The method of claim 6 wherein

When the dual mode wireless terminal is started, the second communication mode is started first, and then the first communication mode is started.

8. The method of claim 6 wherein

When the dual mode wireless terminal is turned off, the first communication mode is turned off, and then the second communication mode is turned off.

9. The method of claim 6, 7 or 8, wherein

The first communication mode is a code division multiple access (CDMA) communication mode, and the second mode is Global Mobile IP070029

Letter System (GSM) communication mode.

10. A dual mode wireless terminal having a dual communication mode, the dual mode wireless terminal' comprising: a first communication device, configured to communicate in a first communication mode;

a second communication device, configured to perform communication in the second communication mode;

Wherein the first communication device and the second communication device stand by at the same time, the control device sends an instruction to turn off the transmitter to the second communication device when detecting that the first communication device enters the communication state, and detects the first When the communication device ends the communication, transmitting an instruction to turn on the transmitter to the second communication device, the second communication device turns off the transmitter of the device according to the received instruction to turn off the transmitter, and according to the received instruction to turn on the transmitter Turn on the transmitter of this unit.

11. The dual mode wireless terminal according to claim 10, wherein the control device detects an operation state of the second communication device, and when detecting that the second communication device enters a communication state, transmits a network search to the first communication device. And transmitting, to the first communication device, an instruction to enable the network search function when detecting that the communication of the second communication device ends;

12. The dual mode wireless terminal of claim 10, wherein:

The control device is further configured to activate the second communication device when the dual mode wireless terminal is activated, and then activate the first communication device. .

13. The dual mode wireless terminal of claim 10, wherein:

The control device is further configured to turn off the first communication device and then turn off the second communication device when the dual mode wireless terminal is turned off.

The dual mode wireless terminal according to any one of claims 10 to 13, wherein: the first communication device is a code division multiple access (CDMA) communication device, and the second communication device is a global mobile communication System (GSM) communication device.

A dual mode wireless terminal having a dual communication mode, the dual mode wireless terminal comprising: a first communication device, configured to communicate in a first communication mode;

a control device, configured to detect an operating state of the first communication device and the second communication device, The first communication device and the second communication device are simultaneously waiting, the control device detects an operation state of the second communication device, and sends a message to the first communication device when detecting that the second communication device enters a communication state. Turning off an instruction of the network search, and transmitting an instruction to turn on the network search function to the first communication device when detecting that the communication of the second communication device ends;

16. The dual mode wireless terminal of claim 15, wherein:

The control device is further configured to activate the second communication device when the dual mode wireless terminal is activated, and then activate the first communication device.

17. The dual mode wireless terminal of claim 15 wherein:

18. A dual mode wireless terminal according to claim 15, 16 or 17, wherein:

The first communication device is a code division multiple access (CDMA) communication device, and the second communication device is a Global Mobile Telecommunications System (GSM) communication device.