Handheld computing unit coordination of femtocell AP functions

• US 8,717,974 B2
• Filed: 06/30/2009
• Issued: 05/06/2014
• Est. Priority Date: 02/06/2008
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza (Reza)
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): HAMPTON, TARELL A
• Application Number:
  US12/495,298
• Publication Number:
  US 20090264125A1
• Time in Patent Office: 1,771 Days
• Field of Search: 370/310, 370/328, 455/403, 455/422.1, 709/208, 709/220, 709/221, 709/222, 709/223, 709/224
• US Class Current: 370/328
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/12 Access point controller devices

Abstract

A handheld computing unit includes a processing module and a plurality of PHY units. The processing module determines whether a femtocell access point (AP) mode is active. When the femtocell AP mode is active, the processing module determines whether at least one other handheld computing unit is supporting femtocell AP operations. When another handheld computing unit is not supporting the femtocell AP operations, the processing module enables the femtocell AP operations. A PHY unit of the plurality of PHY units converts a downstream PHY signal into a downstream radio frequency (RF) signal and converts an upstream RF signal into an upstream PHY signal.

Claims

1. A handheld computing unit that functions as a stand-alone battery operated unit comprises:

a processing module operable coupled to;

determine whether a femtocell access point (AP) mode is active;

when the femtocell AP mode is active, determine whether at least one other handheld computing unit is supporting a femotcell;

when the at least one other handheld computing unit is supporting the femtocell, enable a femtocell AP operation to utilize the handheld computing as a distributed unit to provide a femtocell AP function to support the femtocell along with the at least one other handheld computing unit, the femtocell AP operations IS distributed by at least;

accessing a predetermined distributing mapping of the femtocell AP functions for a given number of handheld computing units;

utilizing a coordinated communication protocol for the given number of handheld computing units to determine a distribution of the femtocell AP functions; and

interpreting a femtocell AP signal to determine the femtocell AP function;

a plurality of physical layer (PHY) units, wherein a PHY Unit of the plurality of PHY units is operably coupled to communicate with at least one other handheld computing unit.

2. The handheld computing unit of claim 1, wherein the processing module is further operably coupled to determine whether the femtocell AP mode is active by at least one of:

detecting an absent or a weak signal from a base station in a geographic area designated for cellular service;

receiving a signal indicating that the femtocell AP mode is active for the geographic area designated for cellular service, wherein the base station to transmit a radio frequency (RF) signal that includes the signal;

receiving a second signal indicating that the femtocell AP mode is active for the geographic area designated for cellular service, wherein a core network to transmit, via a network, a network signal that includes the second signal; and

automatically determining that the femtocell AP mode is active when the handheld computing unit is coupled to an extended computing unit.

3. The handheld computing unit of claim 1, wherein the femtocell AP operations is provided by:

a core network (CN) interface;

a radio resource controller (RRC);

a radio network controller (RNC); and

a plurality of radio interface medium access control (MAC) units.

4. The handheld computing unit of claim 1, wherein the PHY unit comprises:

a baseband processing module operably coupled to;

convert a downstream PHY signal into a downstream symbol stream; and

convert an upstream symbol stream into an upstream PHY signal; and

a radio frequency (RF) section operably coupled to;

convert the downstream symbol stream into a downstream RF signal; and

convert an upstream RF signal into the upstream symbol stream.

5. The handheld computing unit of claim 1 further comprises:

a local wireless interface module operably coupled to;

convert a downstream local network radio frequency (RF) signal into a downstream control network signal; and

convert an upstream control network signal into an upstream local network RF signal.

6. The handheld computing unit of claim 1 further comprises:

a docking interface coupled to at least the processing module, wherein the docking interface provides coupling of the handheld computing unit to an extended computing unit, wherein the extended computing unit includes a network interface module to;

convert an upstream local network signal into an upstream control network signal; and

convert a downstream control network signal into a downstream local network signal.

7. The handheld computing unit of claim 1, wherein the processing module is further operably coupled to:

determine whether the handheld computing unit is a master, when the femtocell AP operations implementation mode is in a master/slave mode; and

enable the femtocell AP operations for the handheld computing unit to be the master, when the handheld computing unit is determined to be the master.

8. The handheld computing unit of claim 7, wherein when the handheld computing unit is not the master, the processing module is further operably coupled to:

receive a request from another of the at least one other handheld computing unit operating as the master to provide the femtocell AP function; and

enable the femtocell AP function in response to the request.

9. A handheld computing unit that functions as a stand-alone battery operated unit comprises:

a processing module operably coupled to;

detect a femtocell access point (AP) operation for a femtocell based on a femtocell AP signal;

determine a femtocell AP operations implementation mode enable at least one femtocell AP function in accordance with the femtocell AP operations implementation mode, when the femtocell AP operations mode is distributed, by at least one of;

accessing a predetermined distributed mapping of femtocell AP functions for a given number of handheld computing units;

utilizing a coordinated communication protocol for the given number of handheld computing units to determine a distribution of the femtocell AP functions; and

interpreting the femtocell AP signal to determine the at least one femtocell AP function;

generate a femtocell control signal in accordance with the at least one femtocell AP function;

a plurality of physical layer (PHY) units operable coupled to the processing module; and

a local wireless interface module, wherein the local wireless interface module or one of the plurality of PHY units is operable coupled to transfer the femtocell control signal.

10. The handheld computing device of claim 9, wherein the femtocell AP signal comprises at least one of:

a second femtocell control signal;

an assignment message;

a beacon signal indicating the femtocell AP operation;

an upstream physical layer (PHY) signal; and

a downstream PHY signal.

11. The handheld computing device of claim 9, wherein the processing module determines femtocell AP operations implementation mode by at least one of:

the femtocell AP signal;

receiving a mode indication signal; and

receiving a response to a query message.

12. The handheld computing unit of claim 9, wherein the at least one femtocell AP function is to be provided by:

a core network (CN) interface;

a radio resource controller (RRC);

a radio network controller (RNC); and

a plurality of radio interface medium access control (MAC) units.

13. The handheld computing unit of claim 9, wherein the processing module is operably coupled to:

detect when another handheld computing unit that is configured to perform at least one other femtocell AP function is unable to perform the at least one other femtocell AP function; and

enable the at least one other femtocell AP function in accordance with a femtocell AP functions reallocation protocol.

14. The handheld computing unit of claim 9, wherein the processing module is operably coupled to:

detect when another handheld computing unit is able to perform the femtocell AP function; and

disable the at least one other femtocell AP function in accordance with a femtocell AP functions reallocation protocol.

15. A handheld computing unit that functions as a stand-alone battery operated unit comprises:

a processing module operably coupled to;

detect a femtocell access point (AP) operation for a femtocell based on a femtocell AP signal;

determine a femtocell AP operations implementation mode;

determine whether the handheld computing unit is of a higher master priority than a current master, when the femtocell AP operations implementation mode is in a master/slave mode;

determine which femtocell AP functions to perform locally and which femtocell AP functions to have performed by at least one other handheld computing unit, when the handheld computing unit has a higher master priority, by at least one of;

accessing a predetermined mapping of femtocell AP functions;

querying the at least one other handheld computing unit regarding one or more user devices;

querying the at least one other handheld computing unit regarding available resources; and

querying the at least one other handheld computing unit regarding available power;

enable the femtocell AP functions to perform locally;

generate an assignment message indicating the femtocell AP functions to be performed by the at least one other handheld computing unit; and

a plurality of physical layer (PHY) units operably coupled to the processing module; and

a local wireless interface module, wherein the local wireless interface module or one of the plurality of PHY units is operably coupled to transfer the assignment message.

16. The handheld computing unit of claim 15, wherein the femtocell AP functions are provided by:

a core network (CN) interface;

a radio resource controller (RRC);

a radio network controller (RNC); and

a plurality of radio interface medium access control (MAC) units.

17. The handheld computing unit of claim 15, wherein the processing module is further operably coupled to:

receive another assignment message, when the handheld computing unit is not of a higher master priority; and

interpret the another assignment message to identify the femtocell AP functions to perform locally; and

enable the femtocell AP functions to perform locally.

18. A handheld computing unit that functions as a stand-alone battery operated unit comprises:

a processing module operably coupled to;

detect a femtocell access point (AP) operation for a femtocell based on a femtocell AP signal;

determine a femtocell AP operations implementation mode;

determine whether the handheld computing unit is of a higher master priority than a current master, when the femtocell AP operations implementation mode is in a master/slave mode;

determine which femtocell AP functions to perform locally and which femtocell AP functions to have performed by at least one other handheld computing unit, when the handheld computing has a higher master priority, by;

determining that the handheld computing unit is to perform the femtocell AP functions to support a first set of user devices; and

determining that the at least one other handheld computing unit is to perform the femtocell AP functions to support a second set of user devices

enable the femtocell AP functions to perform locally;

generate an assignment message indicating the femtocell AP functions to be performed by at least one other handheld computing unit and;

a plurality of physical layer (PHY) units operably coupled to the processing module; and

a local wireless interface module, wherein the local wireless module or one of the plurality of PHY units is operably coupled to transfer the assignment message.

19. The handheld computing unit of claim 18, wherein the femtocell AP functions are provided by:

a core network (CN) interface;

a radio resource controller (RRC);

a radio network controller (RNC); and

a plurality of radio interface medium access control (MAC) units.

20. The handheld computing unit of claim 18, wherein the processing module is further operably coupled to:

receive another assignment message, when the handheld computing unit is not of a higher master priority; and

interpret the another assignment message to identify the femtocell AP functions to perform locally; and

enable the femtocell AP functions to perform locally.