Duplex operation in a cellular communication system

• US 9,407,423 B2
• Filed: 09/30/2013
• Issued: 08/02/2016
• Est. Priority Date: 08/19/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Beale, Martin Warwick, Jones, Alan E.
• Primary Examiner(s): Jagannathan, Melanie
• Application Number:
  US14/042,112
• Publication Number:
  US 20140029479A1
• Time in Patent Office: 1,037 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

A cellular communication system comprises a first base station serving at least a first user equipment. The base station comprises functionality for transmitting a base station duplex capability message to user equipments using a transmission format which is common to a plurality of duplex modes. A first user equipment comprises a transceiver which receives the base station duplex capability message. A RACH characteristics processor determines at least one transmit characteristic for an access message in response to the base station duplex capability message and a RACH transmit controller controls the transmission of an access message to the first base station in response to the at least one transmit characteristic.

Claims

1. An electronic device comprising:

circuitry configured to

broadcast duplex capability information to user equipment, the duplex capability information including information identifying a plurality of duplex modes supported by the electronic device, wherein

the circuitry is configured to broadcast the duplex capability information to the user equipment on a same bandwidth for the plurality of duplex modes;

receive an access request message requesting to attach to a network transmitted by the user equipment in response to the duplex capability information; and

receive a communication confirmation message including a user equipment duplex capability characteristic transmitted by the user equipment after the access request message is received.

2. The electronic device of claim 1, wherein the circuitry is further configured to:

receive the access request message transmitted by the user equipment according to at least one of the identified duplex modes.

3. The electronic device of claim 1, wherein the circuitry is further configured to:

allocate a shared channel to the user equipment based on the user equipment duplex capability.

4. The electronic device of claim 1, wherein a first duplex mode of the plurality of duplex modes is a frequency division duplex (FDD) mode and a second duplex mode of the plurality of duplex modes is a time division duplex (TDD) mode.

5. The electronic device of claim 1, wherein a first duplex mode of the plurality of duplex modes is a half -duplex mode and a second duplex mode of the plurality of duplex modes is a full duplex mode.

6. The electronic device of claim 1, wherein

the circuitry is configured to broadcast the duplex capability information to the user equipment according to a signal structure that is common to the plurality of duplex modes, and

the signal structure is defined by one or more common transmission parameters from the group consisting of:

a signal bandwidth;

a coding rate;

a modulation scheme;

an interleaving;

a coding scheme; and

a timing.

7. The electronic device of claim 1, wherein

the user equipment is not attached to the network prior to transmitting the access request message in response to the duplex capability information broadcast by the electronic device.

8. An communication apparatus comprising:

an antenna unit; and

circuitry configured to

broadcast duplex capability information to user equipment, the duplex capability information including information identifying a plurality of duplex modes supported by the electronic device, wherein

the circuitry is configured to broadcast the duplex capability information to the user equipment on a same bandwidth for the plurality of duplex modes;

receive an access request message requesting to attach to a network transmitted by the user equipment in response to the duplex capability message; and

receive a communication confirmation message including a user equipment duplex capability characteristic transmitted by the user equipment after the access request message is received.

9. The communication apparatus of claim 8, wherein the circuitry is further configured to:

receive the access request message transmitted by the user equipment according to at least one of the identified duplex modes.

10. The communication apparatus of claim 8, wherein the circuitry is further configured to:

allocate a shared channel to the user equipment based on the user equipment duplex capability.

11. The communication apparatus of claim 8, wherein a first duplex mode of the plurality of duplex modes is a frequency division duplex (FDD) mode and a second duplex mode of the plurality of duplex modes is a time division duplex (TDD) mode.

12. The communication apparatus of claim 8, wherein a first duplex mode of the plurality of duplex modes is a half-duplex mode and a second duplex mode of the plurality of duplex modes is a full duplex mode.

13. The communication apparatus of claim 8, wherein

the circuitry is configured to broadcast the duplex capability information to the user equipment according to a signal structure that is common to the plurality of duplex modes, and

the signal structure is defined by one or more common transmission parameters from the group consisting of:

a signal bandwidth;

a coding rate;

a modulation scheme;

an interleaving;

a coding scheme; and

a timing.

14. A method comprising:

broadcasting, by a wireless interface, duplex capability information to user equipment, the duplex capability information including information identifying a plurality of duplex modes supported by the electronic device, wherein

the duplex capability information is transmitted to the user equipment on a same bandwidth for the plurality of duplex modes;

receiving an access request message requesting to attach to a network transmitted by the user equipment in response to the duplex capability message; and

receiving a communication confirmation message including a user equipment duplex capability characteristic transmitted by the user equipment after the access request message is received.

15. The method of claim 14, wherein

the receiving includes receiving the access request message transmitted by the user equipment according to at least one of the identified duplex modes.

16. The method of claim 14, further comprising:

allocating a shared channel to the user equipment based on the user equipment duplex capability.

17. The communication apparatus of claim 14, wherein a first duplex mode of the plurality of duplex modes is a frequency division duplex (FDD) mode and a second duplex mode of the plurality of duplex modes is a time division duplex (TDD) mode.

18. The method of claim 14, wherein a first duplex mode of the plurality of duplex modes is a half -duplex mode and a second duplex mode of the plurality of duplex modes is a full duplex mode.

19. The method of claim 14, wherein

the duplex capability information is broadcast to the user equipment according to a signal structure that is common to the plurality of duplex modes, and

the signal structure is defined by one or more common transmission parameters from the group consisting of:

a signal bandwidth;

a coding rate;

a modulation scheme;

an interleaving;

a coding scheme; and

a timing.