System, apparatus, computer program product and method for controlling terminal output power
View Patent ↗Controlling the output power level of a dual transfer mode (DTM) capable terminal involves generating a network message. The network message may be a circuit-switched (CS) handover command and/or a point-to-point signaling message. A maximum output power level value is associated with the network message. The network message is transferred from the network to the terminal. A packet-switched (PS) output power level of the terminal is determined using the maximum output power level value received via the network message.
1. A method comprising:
generating at least one signaling message at a network;
associating, with the at least one signaling message, a packet-switched-specific power control parameter for a terminal operating in a dual transfer mode, wherein the signaling message comprises at least one of a system information 6 (SI 6 ) message and a dual transfer mode information message, and wherein the packet-switched-specific power control parameter comprises a maximum power control parameter; and
transmitting the at least one signaling message from the network to the terminal via a circuit-switched, point-to-point communication wherein the at least one signaling message facilitates defining a maximum packet-switched output power level (PMAX) using the maximum power control parameter received via the at least one signaling message, and defining a packet-switched output power level P CH to be used as the terminal's output power level for packet-switched traffic in the dual transfer mode according to the formula P CH=min(Γ 0 −Γ CH −α*(C+48),PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific power control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal.
2. The method of claim 1 , wherein defining the packet-switched output power level comprises defining the packet-switched output power level for packet-switched traffic after a circuit-switched handover.
3. The method of claim 1 , wherein transmitting the at least one signaling message comprises transmitting the at least one signaling message via a slow associated control channel (SACCH).
4. The method of claim 1 , wherein the at least one signaling message determines whether or not the dual transfer mode is supported in a new cell.
5. The method of claim 1 , wherein the at least one signaling message comprises a point-to-point system information message.
6. The method of claim 1 , wherein defining a packet-switched output power level comprises using a default value in defining the packet-switched output power level if the power control parameter is not provided via the signaling message.
7. The method of claim 1 , wherein the terminal is capable of simultaneously maintaining a circuit-switched data session and a packet-switched data session via the network.
8. A method comprising:
receiving a packet-switched specific power control parameter via a circuit-switched handover command at a terminal operating in a dual-transfer mode via a circuit-switched network and a packet-switched network, wherein the packet-switched specific power control parameter comprises a maximum power control parameter;
defining a maximum packet-switched output power level (PMAX) based on the maximum power control parameter;
defining a packet-switched output power level P CH to be used as the terminal's output power level for packet-switched traffic according to the formula P CH=min(Γ 0 −Γ CH −α*(C+48), PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific power control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal; and
utilizing the packet-switched specific power control parameter for packet-switched power control for packet-switched traffic at the terminal.
9. The method of claim 8 , further comprising defining a packet-switched output power level to be used as the terminal's output power level for packet-switched traffic using the packet-switched specific power control parameter received via the circuit-switched handover command.
10. The method of claim 9 , wherein defining the packet-switched output power level comprises using a default value in defining the packet-switched output power level if the packet-switched specific power control parameter is not provided via the circuit-switched handover command.
11. The method of claim 8 , wherein providing the maximum power control parameter to the terminal via the circuit-switched handover command comprises placing the maximum power control parameter in an existing power level information element of the circuit-switched handover command.
12. The method of claim 8 , wherein the terminal is capable of simultaneously maintaining a circuit-switched data session and a packet-switched data session via the network.
13. An apparatus comprising:
a transceiver interface-receiving a packet-switched specific, maximum power control parameter via a circuit-switched point-to-point signaling message, wherein the circuit-switched point-to-point signaling message comprises at least one of a system information 6 (SI 6 ) message and a dual transfer mode information message; and
a processor configured to:
define a maximum packet-switched output power level (PMAX) based on the maximum power control parameter;
define a packet-switched output power level P CH to be used as the terminal's output power level for packet-switched traffic according to the formula P CH =min(Γ 0 −Γ CH −α*(C+48), PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific power control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal; and
utilize the maximum power control parameter to control a terminal output power for packet-switched network traffic for operating in a dual transfer mode.
14. The apparatus of claim 13 , wherein the processor is further configured to utilize the maximum power control parameter to control the terminal's output power for packet-switched traffic after a circuit-switched handover.
15. The apparatus of claim 13 , wherein the transceiver is capable of receiving the maximum power control parameter via a slow associated control channel (SACCH).
16. The apparatus of claim 13 , wherein the processor is farther configured to define a packet-switched output power level using the maximum power control parameter, the packet-switched output power level to be used as the terminal's output power level for packet-switched traffic after a circuit-switched network handover.
17. The apparatus of claim 16 , wherein defining the packet-switched output power level comprises using a default value in defining the packet-switched output power level if the maximum power control parameter is not provided via the signaling message.
18. The apparatus of claim 13 , wherein the terminal is capable of simultaneously maintaining sessions in each of the circuit-switched and packet-switched networks.
19. An apparatus comprising:
a transceiver interface receiving a packet-switched specific, maximum power control parameter via a circuit-switched handover command for a terminal operating in a dual transfer mode; and
a processor configured to:
define a maximum packet-switched output power level (PMAX) based on the maximum power control parameter;
define a packet-switched output power level P CH to be used as the terminal's output power level for packet-switched traffic according to the formula P CH =min(Γ 0 −Γ CH −α*(C+48), PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific power control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal; and
utilize the maximum power control parameter for packet-switched power control for packet-switched network traffic.
20. The apparatus of claim 19 , wherein the processor is further configured to define a packet-switched output power level using the maximum power control parameter, the packet-switched output power level to be used as the terminal's output power level for packet-switched traffic.
21. The apparatus of claim 20 , wherein defining the packet-switched output power level comprises using a default value in defining the packet-switched output power level if the maximum power control parameter is not provided via the circuit-switched handover command.
22. The apparatus of claim 19 , wherein the maximum power control parameter is included in an existing power level information element of the circuit-switched handover command.
23. The apparatus of claim 19 , wherein the terminal is capable of simultaneously maintaining sessions in each of the circuit-switched (CS) and packet-switched (PS) networks.
24. A computer-readable medium having instructions stored thereon which are executable by an apparatus to perform operations comprising:
receiving a packet-switched specific maximum power control parameter via a network from at least one of a circuit-switched handover command and a circuit-switched point-to-point signaling message directed to a terminal operating in a dual transfer mode, wherein the circuit-switched point-to-point signaling message comprises at least one of a system information 6 (SI 6 ) message, a dual transfer mode information message;
defining a maximum packet-switched output power level (PMAX) and a packet-switched output power level based on the maximum power control parameter, wherein the packet-switched output power level is used as the terminal's output power level for packet-switched traffic;
defining a packet-switched output power level P based on the maximum power control parameter according to the formula P CH =min(Γ 0 −Γ CH −α*(C+48), PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific power control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal; and
establishing a packet-switched data session using the packet-switched output power level.
25. An apparatus comprising:
a processor configured to determine a packet-switched specific maximum power control parameter usable by a terminal for packet-switched power control for packet-switched network traffic in a dual transfer mode of the terminal; and
a transceiver sending the maximum power control parameter to the terminal via a circuit-switched handover command to facilitate defining, at the terminal, a maximum packet-switched output power level (PMAX) and a packet-switched output power level based on the maximum power control parameter,
wherein the packet-switched output power level is used as the terminal's output power level for packet-switched traffic, and wherein the packet-switched output power level is defined according to the formula P=min(Γ 0 −Γ CH −α*(C+48), PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific power control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal.
26. The apparatus of claim 25 , wherein the maximum power control parameter is included in an existing power level information element of the circuit-switched handover command.
27. The apparatus of claim 25 , wherein the terminal is capable of simultaneously maintaining sessions in each of the circuit-switched and packet-switched networks.
28. An apparatus comprising:
a processor configured to determine a packet-switched specific, maximum power control parameter usable by the terminal for packet-switched power control for packet-switched network traffic in a dual transfer mode of the terminal; and
a transceiver sending the maximum power control parameter to the terminal via a circuit-switched point-to-point signaling message, wherein the circuit-switched point-to-point signaling message comprises at least one of a system information 6 (SI 6 ) message and a dual transfer mode information message that facilitates defining, at the terminal, a maximum packet-switched output power level (PMAX) and a packet-switched output power level based on the maximum power control parameter, wherein the packet-switched output power level is used as the terminal's output power level for packet-switched traffic, and wherein the packet-switched output power level is defined according to the formula P=min(Γ 0 −Γ CH −α*(C+48), PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific rower control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal.
29. The apparatus of claim 28 , wherein the terminal simultaneously maintains sessions in each of the circuit-switched and packet-switched networks.
30. A computer-readable medium having instructions stored thereon which are executable by an apparatus to perform operations comprising:
determining a packet-switched(PS)-specific maximum power control parameter usable by a terminal for packet-switched power control for packet-switched network traffic in a dual transfer mode of the terminal; and
sending the maximum power control parameter to the terminal via at least one of a circuit-switched handover command and a circuit-switched point-to-point signaling message, wherein the circuit-switched point-to-point signaling message comprises at least one of system information 6 (SI 6 ) message and a dual transfer mode information message that facilitates defining, at the terminal, a maximum packet-switched output power level (PMAX) and a packet-switched output power level based on the maximum power control parameter, wherein the packet-switched output power level is used as the terminal's output power level for packet-switched traffic, and wherein the packet-switched output power level is defined according to the formula P=min(Γ 0 −Γ CH −α*(C+48), PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific power control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal.
31. A system comprising:
means for generating network message that includes at least one of a circuit-switched handover command and a circuit-switched point-to-point signaling message wherein the circuit-switched point-to-point signaling message comprises at least one of system information 6 (SI 6 ) message and a dual transfer mode information message;
means for associating a packet-switched specific, maximum output power control value with the network message;
means for transmitting the network message from the network to a terminal operating in a dual transfer mode;
means for defining a maximum packet-switched output power level (PMAX) based on the maximum output power control value, wherein the packet-switched output power level is used as the terminal's output power level for packet-switched traffic, and wherein defining the packet-switched output power level comprises calculating the packet-switched output power level P according to the formula P=min(Γ 0 −Γ CH −α*(C+48), PMAX), wherein: Γ 0 comprises an architecture specific power control parameter; Γ CH comprises a terminal and channel specific power control parameter; α comprises a system parameter broadcast on a control channel or sent to the terminal; and C comprises a normalized received signal level at the terminal; and
means for defining a packet-switched output power level of the terminal using the maximum output power control value received via the network message.