Cellular communication system and method for broadcast communication

• US 20070165584A1
• Filed: 11/20/2006
• Published: 07/19/2007
• Est. Priority Date: 11/22/2005
• Status: Active Grant

• Current Assignee: NVIDIA Corporation
• Original Assignee: IPWireless Inc. (NVIDIA Corporation)
• Inventors: Ponnampalam, Vishakan, Darwood, Peter
• Granted Patent: US 7,986,712 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

A cellular communication system comprises a management function having a broadcast mode function; a plurality of wireless serving communication units operably coupled to the management function; and a plurality of wireless subscriber communication units receiving signals from respective wireless serving communication units in an uni-cast mode of operation on a frequency channel comprising a plurality of downlink transmission resources. The broadcast mode function applies a common cell identifier associated with broadcast transmissions from the plurality of wireless serving communication units thereby signalling to the plurality of wireless subscriber communication units that part or all of the transmission resource is to be configured or re-configured for broadcast mode of operation.

Claims

1. A cellular communication system comprising:

a management function having a broadcast mode function;

a plurality of wireless serving communication units operably coupled to the management function; and

a plurality of wireless subscriber communication units receiving signals from respective wireless serving communication units in an uni-cast mode of operation on a frequency channel comprising a plurality of downlink transmission resources;

wherein the broadcast mode function applies a common cell identifier associated with broadcast transmissions from the plurality of wireless serving communication units and comprises means for signalling to the plurality of wireless subscriber communication units that part or all of the downlink transmission resource is to be configured or re-configured for broadcast mode of operation using the common cell identifier.

2. The communication system of claim 1, wherein the plurality of wireless serving communication units transmit the broadcast signal such that a composite broadcast signal is received by at least one of the plurality of wireless subscriber communication units from the plurality of wireless serving communication units.

3. The communication system of claim 1, wherein the broadcast mode function is configured to select a ratio of available resource between uni-cast and broadcast communications to be supported by one or more of the plurality of wireless serving communication units.

4. The communication system of claim 3, wherein the broadcast mode function is configured to dynamically alter the ratio in response to one or more of the following:

user demand, time of day, number of active users, active user profiles, services being supported.

5. The communication system of claim 1, wherein the common cell identifier is signalled to the plurality of wireless subscriber communication units via system information transmitted from at least one wireless serving communication unit on a common control channel.

6. The communication system of claim 1, wherein a number of the plurality of downlink transmission resources comprise downlink timeslots and the broadcast mode function configures or re-configures the operation of the communication system in a discontinuous mode.

7. The communication system of claim 1, wherein the management function allocates the common cell identifier to all of the downlink transmission resource thereby configuring or re-configuring one or more of the plurality of wireless serving communication units to support broadcast communication.

8. The communication system of claim 1, wherein a wireless subscriber communication unit of the plurality of wireless subscriber communication units is configured to block a re-registration process to a different wireless serving communication unit when roaming between respective geographic areas when solely receiving broadcast communication.

9. The communication system of claim 1, wherein the communication system is a 3^rd Generation Partnership Project (3GPP) cellular communication system.

10. The communication system of claim 1, wherein the communication system is a time division duplex code division multiple access cellular communication system.

11. A wireless serving communication unit adapted to operate in the communication system of claim 1.

12. A management function adapted to operate in the communication system of claim 1.

13. A wireless subscriber communication unit adapted to operate in the communication system of claim 1.

14. A management function for a cellular communication system arranged to be operably coupled to a plurality of wireless serving communication units supporting communication in an uni-cast mode of operation to a plurality of wireless subscriber communication units on a frequency channel comprising a plurality of downlink transmission resources,

wherein the management function comprises:

a broadcast mode function that applies a common cell identifier associated with broadcast transmissions to the plurality of serving communication units; and

means for signalling to the plurality of wireless subscriber communication units that part or all of the downlink transmission resource is to be configured or re-configured for broadcast mode of operation using the common cell identifier.

15. The management function of claim 14, wherein the broadcast mode function is configured to send a broadcast signal via the plurality of wireless serving communication units to at least one of the plurality of wireless subscriber communication units.

16. The management function of claim 14, wherein the broadcast mode function selects a ratio of available resource between uni-cast and broadcast communications to be supported by one or more of the plurality of wireless serving communication units.

17. The management function of claim 16, wherein the broadcast mode function dynamically alters the ratio in response to one or more of the following:

user demand, time of day, number of active users, active user profiles, one or more supported services.

18. The management function of claim 14, wherein the broadcast mode function signals the common cell identifier to the plurality of wireless subscriber communication units via system information transmitted from at least one wireless serving communication unit on a common control channel.

19. The management function of claim 14, wherein a number of the plurality of downlink transmission resources comprise downlink timeslots and the broadcast mode function configures or re-configures the communication system to a discontinuous mode of operation.

20. The management function of claim 14, wherein the management function allocates the common cell identifier to all of the downlink transmission resource to configure or re-configure one or more wireless serving communication units to support broadcast communication.

21. The management function of claim 14, wherein the management function is arranged to support 3^rd Generation Partnership Project (3GPP) communication.

22. The management function of claim 14, wherein the communication system is a time division duplex code division multiple access cellular communication system.

23. A method of configuring a cellular communication system comprising a management function having a broadcast mode function;

the method comprising;

supporting communication by at least one of a plurality of serving communication units to at least one of a plurality of wireless subscriber communication units on a frequency channel comprising a plurality of downlink transmission resources in an uni-cast mode of operation;

applying a common cell identifier associated with broadcast transmissions to at least one of the plurality of serving communication units; and

signalling to at least one of the plurality of wireless subscriber communication units that part or all of the downlink transmission resource is to be configured or re-configured for broadcast mode of operation.

24. The method of claim 23, the method further comprising receiving a composite broadcast signal at the at least one of the plurality of wireless subscriber communication units from the plurality of wireless serving communication units.

25. The method of claim 23, further comprising selecting a ratio of available resource between uni-cast and broadcast communications to be supported by one or more of the plurality of wireless serving communication units.

26. The method of claim 25, further comprising dynamically altering the ratio in response to one or more of the following:

user demand, time of day, number of active users, active user profiles, services being supported.

27. The method of claim 23, wherein the common cell identifier is signalled to the plurality of wireless subscriber communication units via system information transmitted from at least one wireless serving communication unit on a common control channel.

28. The method of claim 23, wherein a number of the plurality of downlink transmission resources comprise downlink timeslots and the signalling comprises configuring or re-configuring the operation of the communication system in a discontinuous mode.

29. The method of claim 23, further comprising allocating the common cell identifier to all downlink transmission resource to configure or re-configure one or more wireless serving communication units to support only broadcast communication.

30. The method of claim 23, further comprising configuring or re-configuring an operation of a wireless subscriber communication unit to block a re-registration process to a different wireless serving communication unit when roaming between respective geographic areas supported by wireless serving communication units and solely receiving broadcast communication.

31. The method of claim 23, wherein the communication system is a 3^rd Generation Partnership Project (3GPP) cellular communication system.

32. The method of claim 23, wherein the communication system is a time division duplex code division multiple access cellular communication system.