Handheld computing unit with power management

• US 8,125,959 B2
• Filed: 06/30/2009
• Issued: 02/28/2012
• 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): Pham, Chi H
• Assistant Examiner(s): BOAKYE, ALEXANDER O
• Application Number:
  US12/495,253
• Publication Number:
  US 20090264154A1
• Time in Patent Office: 973 Days
• Field of Search: 370/331, 370/338, 370/339, 370/328, 370/329, 370/310.2, 370/389, 370/392, 370/395.6, 370/401, 370/432, 370/466, 370/467, 370/469, 370/471, 370/295, 370/281, 455/556.2, 455/557, 455/556.1, 710/2, 709/224, 709/222, 709/219, 709/221
• US Class Current: 370/331
• CPC Class Codes: G06F 1/3209 Monitoring remote activity, e.g. over telephone lines or network connections
• CPC Class Codes: H04W 52/0261 managing power supply demand, e.g. depending on battery level
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A handheld computing unit includes a plurality of PHY units, a local wireless interface (LWI), and a processing module. When the unit is in a femtocell AP mode, the processing module performs one or more femtocell AP functions to facilitate conversion of a LWI downstream data into one or more downstream PHY signals and conversion of one or more upstream PHY signals into the LWI upstream data; determines energy demand of the handheld computing unit; determines whether the energy demand compares unfavorably to energy performance criteria; and, when the energy demand compares unfavorably to the energy performance criteria, executes an energy adjustment algorithm.

Claims

1. A handheld computing unit comprises:

a plurality of physical layer (PHY) units, wherein a PHY unit of the plurality of PHY units is operably coupled to, when the handheld computing unit in a femtocell access point (AP) mode;

convert an upstream user equipment (UE) radio frequency (RF) signal into an upstream PHY signal in accordance with a femtocell protocol; and

convert a downstream PHY signal into a downstream UE RF signal in accordance with the femtocell protocol;

a local wireless interface (LWI) operably coupled to;

convert LWI upstream data into an LWI upstream RF signal in accordance with a local wireless interface protocol; and

convert of an LWI downstream RF signal into LWI downstream data in accordance with the local wireless interface protocol;

a processing module operably coupled to, when the handheld computing unit is the femtocell AP mode;

perform one or more femtocell AP functions to facilitate conversion of the LWI downstream data into one or more downstream PHY signals and conversion of one or more upstream PHY signals into the LWI upstream data, wherein the one or more downstream PHY signals include the downstream PHY signal and the one or more upstream PHY signals include the upstream PHY signal;

determine energy demand of the handheld computing unit;

determine whether the energy demand compares unfavorably to energy performance criteria; and

when the energy demand compares unfavorably to the energy performance criteria, execute an energy adjustment algorithm.

2. The handheld computing unit of claim 1, wherein the energy adjustment algorithm comprises at least one of:

off-loading one or more of the femtocell AP functions;

utilizing a reduced set of the femtocell AP functions; and

requesting coupling to an extended computing unit.

3. The handheld computing unit of claim 2, wherein the processing module is further operably coupled to, when executing the off-loading one or more of the femtocell AP functions:

determine the one or more of the femtocell AP functions to off-load based on individual energy performance of the femtocell AP functions; and

determine one or more external processing resources to perform the one or more of the femtocell AP functions based on at least one of;

a query-response communication, a look up table, a prioritization scheme, and network messaging.

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

perform, from time to time, user application functions, wherein the energy adjustment algorithm further includes at least one of;

off-loading one or more of the user application functions; and

utilizing a reduced set of the user application functions.

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

perform, from time to time, system application functions, wherein the energy adjustment algorithm further includes at least one of;

off-loading one or more of the system application functions; and

utilizing a reduced set of system application functions.

6. The handheld computing unit of claim 1, wherein the femtocell AP functions comprises two or more of:

upstream core network (CN) data formatting;

downstream (CN) data formatting;

core network interface (CI) encoding;

CI decoding;

a plurality of local radio network controller (RNC) functions;

radio interface (RI) encoding;

RI decoding;

a plurality of medium access control (MAC) radio interface functions; and

a plurality of radio resource control (RRC) functions.

7. The handheld computing unit of claim 1, wherein the energy performance criteria comprises at least two of:

a relationship between available power and percentage of the femtocell AP functions being executed by the handheld computing unit;

a relationship between load and battery life;

a relationship between available power and load demand;

power source capabilities; and

power requirements for each of the femtocell AP functions.

8. The handheld computing unit of claim 1, wherein the local wireless interface comprises:

a local wireless interface (LWI) baseband processing module operably coupled to;

convert the LWI upstream data into an LWI upstream symbol stream in accordance with the local wireless interface protocol; and

convert an LWI downstream symbol stream into the LWI downstream data in accordance with the local wireless interface protocol;

a local wireless interface RF section operably coupled to;

convert the LWI upstream symbol stream into the LWI upstream RF signal; and

convert the LWI downstream RF signal into the LWI downstream symbol stream.

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

a radio frequency (RF) section operably coupled to, when the handheld computing unit in a femtocell access point (AP) mode;

convert the upstream user equipment (UE) RF signal into an upstream UE symbol stream in accordance with a femtocell protocol; and

convert a downstream UE symbol stream into the downstream UE RF signal in accordance with the femtocell protocol; and

a baseband processing module operably coupled to, when the handheld computing unit is in the femtocell AP mode, perform baseband functions to;

convert the downstream PHY signal into the downstream UE symbol stream in accordance with the femtocell protocol; and

convert the upstream UE symbol stream into the upstream PHY signal in accordance with the femtocell protocol.

10. The handheld computing unit of claim 9 further comprises:

when the handheld computing unit is in a cellular (CELL) mode;

the radio frequency (RF) section is operably coupled to;

convert a downstream CELL RF signal into a downstream CELL symbol stream in accordance with a cellular communication protocol; and

convert an upstream CELL symbol stream into an upstream CELL RF signal in accordance with the cellular communication protocol;

the baseband processing module is operably coupled to;

convert an upstream CELL physical layer (PHY) signal into the upstream CELL symbol stream in accordance with the cellular communication protocol; and

convert the downstream CELL symbol stream into a downstream CELL PHY signal in accordance with the cellular communication protocol;

the processing module operably coupled to;

convert upstream medium access control (MAC) data into the upstream CELL PHY signal; and

convert the downstream CELL PHY signal into upstream downstream MAC data.

11. The handheld computing unit of claim 9, wherein the energy adjustment algorithm comprises at least one of:

off-loading one or more of the baseband functions; and

utilizing a reduced set of baseband functions.

12. A handheld computing unit comprises:

when the handheld computing unit in a femtocell access point (AP) mode;

a plurality of physical layer (PHY) units, wherein a PHY unit of the plurality of PHY units is operably coupled to, when the handheld computing unit in a femtocell access point (AP) mode;

convert an upstream user equipment (UE) radio frequency (RF) signal into an upstream PHY signal in accordance with a femtocell protocol; and

convert a downstream PHY signal into a downstream UE RF signal in accordance with the femtocell protocol;

a local wireless interface (LWI) operably coupled to;

convert LWI upstream data into an LWI upstream RF signal in accordance with a local wireless interface protocol; and

convert of an LWI downstream RF signal into LWI downstream data in accordance with the local wireless interface protocol;

a processing module operably coupled to perform femtocell AP functions to convert the LWI downstream data into one or more downstream PHY signals and convert one or more upstream PHY signals into the LWI upstream data, wherein the one or more downstream PHY signals include the downstream PHY signal and the one or more upstream PHY signals include the upstream PHY signal.

13. The handheld computing unit of claim 12, wherein the PHY unit comprises:

a radio frequency (RF) section operably coupled to, when the handheld computing unit in a femtocell access point (AP) mode;

convert the upstream user equipment (UE) RF signal into an upstream UE symbol stream in accordance with a femtocell protocol; and

convert a downstream UE symbol stream into the downstream UE RF signal in accordance with the femtocell protocol; and

a baseband processing module operably coupled to, when the handheld computing unit is in the femtocell AP mode, perform baseband functions to;

convert the downstream PHY signal into the downstream UE symbol stream in accordance with the femtocell protocol; and

convert the upstream UE symbol stream into the upstream PHY signal in accordance with the femtocell protocol.

14. The handheld computing unit of claim 13 further comprises:

when the handheld computing unit is in a cellular (CELL) mode;

the radio frequency (RF) section is operably coupled to;

convert an upstream CELL RF signal into an upstream CELL symbol stream in accordance with a cellular communication protocol; and

convert a downstream CELL symbol stream into a downstream CELL RF signal in accordance with the cellular communication protocol;

the baseband processing module is operably coupled to;

convert a downstream CELL physical layer (PHY) signal into the downstream CELL symbol stream in accordance with the cellular communication protocol; and

convert the upstream CELL symbol stream into an upstream CELL PHY signal in accordance with the cellular communication protocol;

the processing module operably coupled to;

convert downstream medium access control (MAC) data in the downstream CELL PHY signal; and

convert the upstream CELL PHY signal into an upstream MAC data.

15. The handheld computing unit of claim 12, wherein the local wireless interface comprises:

a local wireless interface (LWI) baseband processing module operably coupled to;

convert the LWI upstream data into an LWI upstream symbol stream in accordance with the local wireless interface protocol; and

convert an LWI downstream symbol stream into the LWI downstream data in accordance with the local wireless interface protocol;

a local wireless interface RF section operably coupled to;

convert the LWI upstream symbol stream into the LWI upstream RF signal; and

convert the LWI downstream RF signal into the LWI downstream symbol stream.

16. A handheld computing unit comprises:

a local wireless interface (LWI) operably coupled to;

convert LWI upstream data into an LWI upstream RF signal in accordance with a local wireless interface protocol; and

convert of an LWI downstream RF signal into LWI downstream data in accordance with the local wireless interface protocol;

a processing module operably coupled to;

perform application functions of one or more applications;

determine whether the energy demand when performing the application functions compares unfavorably to energy performance criteria;

when the energy demand compares unfavorably to the energy performance criteria, execute an energy adjustment algorithm to determine whether to off-load one or more of the application functions, utilize a reduced set of applications, or to utilize a reduced set of application functions;

when the one or more of the application functions are to be off-loaded;

convert input content of the one or more of the application functions into the LWI upstream data; and

convert the LWI downstream data into output content of the one or more of the application functions.

17. The handheld computing unit of claim 16, wherein the one or more applications comprises:

user applications; and

system applications, wherein the application functions include sub-routines of the user applications or of the system applications.

18. The handheld computing unit of claim 16 further comprises:

a radio frequency (RF) section operably coupled to;

convert a downstream CELL RF signal into a downstream CELL symbol stream in accordance with a cellular communication protocol; and

convert an upstream CELL symbol stream into an upstream CELL RF signal in accordance with the cellular communication protocol;

a baseband processing module operably coupled to;

convert an upstream CELL physical layer (PHY) signal into the upstream CELL symbol stream in accordance with the cellular communication protocol; and

convert the downstream CELL symbol stream into a downstream CELL PHY signal in accordance with the cellular communication protocol;

the processing module operably coupled to;

convert upstream medium access control (MAC) data into the upstream CELL PHY signal; and

convert the downstream CELL PHY signal into a downstream MAC data.

19. The handheld computing unit of claim 16, wherein the processing module is operably coupled to execute an energy adjustment algorithm to off-load the one or more of the application functions further comprises:

determining the one or more of the application functions to off-load based on individual energy performance of the application functions; and

determine one or more external processing resources to perform the one or more of the application functions based on at least one of;

a query-response communication, a look up table, a prioritization scheme, and network messaging.

20. The handheld computing unit of claim 16, wherein the energy performance criteria comprises at least two of:

a relationship between available power and percentage of the application functions being executed by the handheld computing unit;

a relationship between load and battery life;

a relationship between available power and load demand;

power source capabilities; and

power requirements for each of the application functions.

21. The handheld computing unit of claim 16, wherein the local wireless interface comprises:

a local wireless interface (LWI) baseband processing module operably coupled to;

convert the LWI upstream data into an LWI upstream symbol stream in accordance with the local wireless interface protocol; and

convert an LWI downstream symbol stream into the LWI downstream data in accordance with the local wireless interface protocol; and

a local wireless interface RF section operably coupled to;

convert the LWI upstream symbol stream into the LWI upstream RF signal; and

convert the LWI downstream RF signal into the LWI downstream symbol stream.