METHODS, SYSTEMS AND DEVICES FOR WIRELESS DEVICES HAVING MULTIPLE WIRELESS MODULES

• US 20100309825A1
• Filed: 02/25/2009
• Published: 12/09/2010
• Est. Priority Date: 02/25/2008
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Zhang, Xuejun
• Granted Patent: US 8,804,579 B2
• Time in Patent Office: Days
• US Class Current: 370/278
• CPC Class Codes: H04B 1/006 using switches for selecting the desired band H04B1/0057 takes precedence
• CPC Class Codes: H04H 40/18 Arrangements characterised by circuits or components specially adapted for receiving
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Wireless communications devices, methods and systems are implemented in various fashions. According to one such implementation, a method is used in a device using time-division-multiple access and multiple-mode wireless modules. Logic generates a signal indicative (304) of a first (e.g., TV) wireless module (150) being active. In a first state where the first wireless module (150) is active, a switch connects a transmitter of a second (e.g., cellular) wireless module (100) to a duplexer (202). In a second state where the first wireless module is not active, logic connects the transmitter of the second wireless module (100) to an antenna (102) while bypassing the duplexer (202). Logic connects, in the first state, the duplexer (202) to the antenna (102) and connects, in the second state, the transmitter to the antenna while bypassing the duplexer (202). The duplexer (202) connects a receiver of the second wireless module (100) to the antenna (202) and includes a transmit band pass filter designed with a rejection band near an operating band of the first wireless module (150).

Claims

1. For use in a system using time-division-multiple access and multiple wireless modules including a first wireless module having a first transceiver with a receiver that receives data at a first frequency band and a transmitter that sends data at a second frequency band and including a second wireless module having a receiver that receives data operating at a third frequency band, a circuit comprising:

an antenna;

a duplexer having a transmit band pass filter designed with a rejection band near the third frequency band;

a first switch that,

in a first state, routes the data from the transmitter of the first wireless module through the duplexer to a second switch and

in a second state, routes the data from the transmitter to the second switch by bypassing the duplexer; and

the second switch that is connected to the first switch and that

in the first state, routes the data from the transmitter to the antenna, and

in the second state, routes the data from the transmitter to the antenna while bypassing the duplexer;

wherein the first and second states are responsive to a signal indicative of an active state of the second wireless module.

2. The circuit of claim 1, wherein the first switch is a single-pole double-throw (SPDT) switch having a single-pole continuously connected to the transmitter and the second switch is a single-pole four-throw (SP4T) switch having a single-pole continuously connected to the antenna.

3. The circuit of claim 1, further including logic for selecting the first switch port in response to an indication the receiver of the second wireless module is active and activity-based indications from the first wireless module.

4. The circuit of claim 1, wherein the receiver and the transmitter operate in a Global System for Mobile communications (GSM) band.

5. The circuit of claim 1, wherein the first module operates in a GSM band and the second module operates in a digital-video broadcasting mobile (DVB-H) band.

6. The circuit of claim 1, further including

a second transceiver of the first wireless module having a receiver operating in a Digital-Cellular System (DCS) receive band and a transmitter operating in a DCS transmit band;

and

wherein, in a third state, the second switch connects the receiver of the second transceiver in the first wireless module to the antenna and, in a fourth state, the second switch connects the transmitter of the second transceiver to the antenna.

7. The circuit of claim 1, wherein the active state of the second wireless module represents a selection by one of a user and the terminal.

8. The circuit of claim 1, wherein the transmitter of the first transceiver in the first wireless module increases power of transmissions for the first state relative to power of transmission for the second state.

9. The circuit of claim 1, wherein the signal indicative of an active state of the second wireless module is from one of the second module and a main controller of the system.

10. The circuit of claim 1, wherein the first module further includes a third transceiver that operates in Wideband Code Division Multiple Access (WCDMA) mode, and that does not share a duplexer with the first transceiver of the same band.

16. The system of claim 1, wherein the first switch is a single-pole double-throw (SPDT) switch having a single-pole continuously connected to the transmitter and the second switch is a single-pole four-throw (SP4T) switch having a single-pole continuously connected to the antenna.

17. The system of claim 1, further including logic for selecting the first switch port in response to an indication the receiver of the second wireless module is active and activity-based indications from the first wireless module.

18. The system of claim 1, wherein the receiver and the transmitter operate in a Global System for Mobile communications (GSM) band.

19. The system of claim 1, wherein the first module operates in a GSM band and the second receiver operates in a digital-video broadcasting mobile (DVB-H) band.

11. For use in a device using time-division-multiple access and multiple wireless modules, a method comprising:

generating a signal indicative of a first wireless module being active;

in a first state that is responsive to the signal indicating the first wireless module is active, connecting a transmitter of a second wireless module to a duplexer;

in a second state that is responsive to the signal indicating the first wireless module is not active, connecting the transmitter of the second wireless module to an antenna while bypassing the duplexer;

connecting, in the first state, the duplexer to the antenna and connecting, in the second state, the transmitter to the antenna while bypassing the duplexer;

wherein, the duplexer connects a receiver of the second wireless module to the antenna and includes a transmit band pass filter designed with a rejection band near an operating band of receiver of the first wireless module.

12. The method of claim 11, wherein the first wireless module is a mobile television-based module and the second wireless module is a cellular-based module.

13. The method of claim 11, wherein the second switch has a third state that connects a receiver of a second transceiver in the second wireless module to the antenna and a fourth state that connects a transmitter of a second transceiver in the second wireless module to the antenna.

14. The method of claim 13, wherein the second switch has a fifth state that connects both a receiver and a transmitter of a third transceiver in the second wireless module to the antenna, the receiver and the transmitter of the third transceiver in the second wireless module being connected through another duplexer.

15. A system for using time-division-multiple access communications, the system comprising:

a first wireless module having a receiver that receives data at a first frequency band and a transmitter that sends data at a second frequency band;

a second wireless module having a receiver that receives data operating at a third frequency band;

an antenna;

a duplexer having a transmit band pass filter designed with a rejection band near the third frequency band;

a first switch that, in a first state setting, routes the data from the transmitter of the first wireless module through the duplexer and that, in a second state setting, routes the data from the transmitter by bypassing the duplexer; and

a second switch that, in the first state, routes the data from the transmitter to the antenna through the duplexer and, in the second state, routes data from the first switch to the antenna while bypassing the duplexer;

wherein the first and the second states are responsive to a signal indicative of an active state of the second wireless module.