Apparatus and method for selecting processing speed of processor and wireless network
An apparatus and method for selecting a processor clock speed and a wireless network are disclosed. The method for selecting a processing speed of a processor and/or a wireless network to be connected in a User Equipment (UE) in a wireless communication system includes detecting states of a processor-related queue and a network module-related queue, and selecting a processing speed of the processor-related queue and/or a wireless network to be connected, based on the detected states of the processor-related queue and the network module-related queue and power consumptions of a processor and a network module. The processing speed of the processor-related queue and/or the wireless network to be connected are selected to keep a difference between a length of the processor-related queue and a length of the network module-related queue at a predetermined value and minimize the power consumptions of the processor and the network module.
1. A method for selecting a processing speed of a processor and a wireless network to be connected in a mobile terminal in a wireless communication system, the method comprising:
detecting, by the mobile terminal, states of a processor-related queue and a network module-related queue; and
selecting, by the mobile terminal, a processing speed of the processor-related queue and a wireless network to be connected,
wherein the processing speed of the processor-related queue is selected based on an energy-delay trade-off parameter V, a power consumption of the processor P p (s(τ)) at the processing speed s(τ) at time τ, a length of the processor-related queue Q p (τ) at the time τ, a number of cycles per bit λ that the processor can process, and a length of the network module-related queue Q n (τ) at the time τ.
2. The method according to claim 1 ,
wherein the wireless network to be connected is selected based on V, Q n (τ), a power consumption of the network module P n (l(τ)) in the wireless network l(τ) at the time τ, and a transmission rate μ i (τ) of the wireless network l(τ) at the time τ.
3. The method according to claim 1 , further comprising measuring a channel state of at least one candidate wireless network to select the wireless network to be connected.
4. The method according to claim 1 , wherein the processing speed of the processor-related queue, s(τ) is selected to minimize
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where min(A, B) is a smaller value between A and B.
5. The method according to claim 2 , wherein the wireless network to be connected, l(τ) is selected to minimize VP n (l(τ))−2Q n (τ)μ i (τ).
6. A mobile terminal for selecting a processing speed of a processor and a wireless network to be connected in a wireless communication system, the mobile terminal comprising:
a Radio Frequency (RF) unit; and
a processor configured to control the RF unit,
wherein the processor is configured to detect states of a processor-related queue and a network module-related queue, and select a processing speed of the processor-related queue and a wireless network to be connected,
wherein the processing speed of the processor-related queue is selected based on an energy-delay trade-off parameter V, a power consumption of the processor P p (s(τ)) at the processing speed s(τ) at time τ, a length of the processor-related queue Q p (τ) at the time τ, a number of cycles per bit λ that the processor can process, and a length of the network module-related queue Q n (τ) at the time τ.
7. The mobile terminal according to claim 6 ,
wherein the wireless network to be connected is selected based on V, Q n (τ), a power consumption of the network module P n (l(τ)) in the wireless network l(τ) at the time τ, and a transmission rate μ i (τ) of the wireless network l(τ) at the time τ.
8. The mobile terminal according to claim 6 , wherein the processor is configured to measure a channel state of at least one candidate wireless network to select the wireless network to be connected.
9. The mobile terminal according to claim 6 , wherein the processor is configured to select the processing speed of the processor-related queue, s(τ) to minimize
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where min(A, B) is a smaller value between A and B.
10. The mobile terminal according to claim 7 , wherein the processor is configured to select the wireless network to be connected, l(τ) to minimize VP n (l(τ))−2Q n (τ)μ i (τ).
11. The method according to claim 1 ,
wherein the processing speed of the processor-related queue and the wireless network to be connected are selected to keep a difference between Q p (τ) and Q n (τ) at a predetermined value and minimize P p (s(τ)) and P n (l(τ)).
12. The mobile terminal according to claim 6 ,
wherein the processing speed of the processor-related queue and the wireless network to be connected are selected to keep a difference between Q p (τ) and Q n (τ) at a predetermined value and minimize P p (s(τ)) and P n (l(τ)).