Method and apparatus for FDD and TDD terminal entry into a wireless communication network

• US 7,962,161 B1
• Filed: 11/21/2007
• Issued: 06/14/2011
• Est. Priority Date: 11/21/2007
• Status: Active Grant

• Current Assignee: L3 Technologies, Inc. (L3Harris Technologies, Inc.)
• Original Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Inventors: Giallorenzi, Thomas R., Jensen, Christopher, Thomson, Larry S., Lee, Jason Woosuk, Dyal, James
• Primary Examiner(s): MIZRAHI, DIANE D
• Application Number:
  US11/986,578
• Time in Patent Office: 1,301 Days
• Field of Search: 455/456.1, 455/404.1, 455/422.1, 455/434, 455/436, 455/466, 455/501, 455/59, 370/280, 370/281, 370/253, 370/254, 370/328, 370/352, 370/331, 370/338, 370/329, 370/294, 370/252, 704/201
• US Class Current: 455/466
• CPC Class Codes: H04W 48/14 using user query or user detection
• 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

Entry of a terminal into a wireless communications network is facilitated for terminals which may operate in either frequency-division duplex or time-division duplex mode. Join request messages transmitted by the terminals include a duplex capability indicator defining a carrier frequency which can be used to response to the terminals.

Claims

1. A method of facilitating the entry of a member terminal into a wireless communications network, wherein the member terminal may be operating in either a frequency-division duplex or a time-division duplex mode, the method comprising:

establishing a defined carrier frequency for transmission of join request messages;

transmitting a join request message from the member terminal to the communications network on the defined carrier frequency, the join request message comprising a duplex capability field, the duplex capability field including information defining the duplex capability of the member terminal;

receiving the join request message by a control terminal of the communications network; and

transmitting a response message from the control terminal to the member terminal, the response message being transmitted using a carrier frequency determined by the control terminal based from the duplex capability information included in the join request message, the response message including network information to enable entry of the member terminal into the communications network.

2. The method of claim 1, wherein join request messages and response messages are communicated using a first set of communications channels, and data traffic communications between the terminal and the communication network are communicated using a second set of communications channels.

3. The method of claim 2, wherein the second set of communications channels comprises a pair of frequency division duplex channels.

4. The method of claim 2, wherein the second set of communications channels comprises a pair of time division duplex channels.

5. The method of claim 1, wherein the information defining the duplex capability of the terminal comprises a terminal receive carrier frequency field within the join request message.

6. The method of claim 1, wherein the information defining the duplex capability of the terminal comprises a terminal duplex mode field within the join request message, and a defined relationship between terminal duplex mode and terminal receive carrier frequency is known by the communications network.

7. The method of claim 1, wherein the network information to enable entry of the terminal into the communications network comprises at least one field within the response message having at least one of the following network operating parameters:

a traffic channel carrier frequency, a traffic channel data rate, a traffic channel duplex mode, a traffic channel modulation mode, and a traffic channel synchronization parameter.

8. The method of claim 1, further comprising entering the terminal into the communications network so that data traffic communications between the terminal and the communications network can occur.

9. The method of claim 1, further comprising transmitting a confirmation message from the terminal to the communication network to indicate acceptance of network operating parameters specified by the response message.

10. A wireless communication network capable of providing entry of a member terminal into the wireless communications network, wherein the member terminal may be operating in either a frequency-division duplex or a time-division duplex mode, the system comprising:

a member terminal;

a control terminal of the communications network;

wherein the member terminal is configured to transmit a join request message from the member terminal to the control terminal on a defined carrier frequency, the join request message comprising a duplex capability field, the duplex capability field including information defining the duplex capability of the member terminal;

wherein the control terminal is configured to receive the join request message; and

wherein the control terminal is further configured to transmit a response message from the control terminal to the member terminal, the response message being transmitted using a carrier frequency determined by the control terminal based on the duplex capability information included in the join request message, the response message including network information to enable entry of the member terminal into the communications network.

11. The system of claim 10, wherein join request messages and response messages are communicated using a first set of communications channels, and data traffic communications between the member terminal and the control terminal are communicated using a second set of communications channels.

12. The system of claim 10, wherein the information defining the duplex capability of the member terminal comprises a terminal receive carrier frequency field within the join request message.

13. The system of claim 10, wherein the information defining the duplex capability of the member terminal comprises a terminal duplex mode field within the join request message, and a defined relationship between terminal duplex mode and terminal receive carrier frequency is known by the control terminal.