Communication device and a method for operating a communication device
A method and device for providing access to a radio frequency (RF) unit of the device, comprising assigning a static weight value to each of a plurality of signals, calculating a true weight value for each signal comprising modifying the static weight value with a dynamic value, wherein the dynamic value is based on at least one of a performance consideration value or a signal status value, determining a signal with a highest true weight value from the plurality of signals; and providing the signal with the highest true weight value access to the RF unit of the device.
1. A multi-subscriber identity module (SIM) device configured to provide access to a radio frequency (RF) unit of the device, comprising:
the RF unit configured to transmit or receive each of a plurality of signals; and
a baseband modem configured to:
assign a static weight value to each of the plurality of signals;
calculate a true weight value for each signal comprising modifying the static weight value with a dynamic value;
determine α signal with a highest true weight value from the plurality of signals; and
provide the signal with the highest true weight value access to the RF unit of the device.
2. The device of claim 1 , wherein the dynamic value is based on at least one of a performance consideration value or a signal status value.
3. The device of claim 2 , wherein the performance consideration value comprises a probability of reception or transmission of the signal.
4. The device of claim 2 , wherein the signal status of each signal is calculated based on a signal history of each signal.
5. The device of claim 2 , wherein calculating the true weight value of each signal further comprises using a formula:
W true ( i )= W init *δ*α
where W true is the true weight, W init is the static weight value assigned to each signal, δ is a probability of data reception or transmission, and α is a value calculated from a history of the previous transmissions of the signal.
6. The device of claim 5 , where δ is determined by the formula
δ=1−exp((λ−1) g )
where λ is a probability of the reception of the signal at a base station or at the device and g is a signal gain.
7. The device of claim 5 , where δ is determined by the formula:
δ
=
{
1
,
if
P
success
≥
P
limit
b
,
otherwise
where b is a value greater than 0 but less than 1, P success is a probability of successfully communicating the signal and P limit is a minimal value based on the device's requirements.
8. The device of claim 5 , where α is determined by the formula:
α=1+ N missed
where N missed is a number of times the signal has been missed.
9. The device of claim 5 , where α is determined by the formula:
α
=
{
1
,
P
(
T
next
<
T
max
|
T
d
)
<
P
min
y
,
P
(
T
next
<
T
max
|
T
d
)
≥
P
min
where y is a value greater than 1, P(T next <T max |T d ) is a probability that a data will be discarded before a time needed to make a next transmission, T next , will be scheduled to occur later than a maximum retransmission, T max , based on a current delay, T d , and P min is a minimum loss rate defined by a Quality of Service Class Identifier.
10. The device of claim 1 , the baseband modem further configured to obtain the static weight value for each of the plurality of signals from a predetermined data.
11. A method for a multi-subscriber identity module (SIM) device to provide access to a radio frequency (RF) unit of the device, comprising:
assigning a static weight value to each of a plurality of signals;
calculating a true weight value for each signal comprising modifying the static weight value with a dynamic value;
determining a signal with a highest true weight value from the plurality of signals; and
providing the signal with the highest true weight value access to the RF unit of the device.
12. The method of claim 11 , wherein the dynamic value is based on at least one of a performance consideration value or a signal status value.
13. The method of claim 12 , wherein the performance consideration value comprises a probability of reception or transmission of the signal.
14. The method of claim 12 , wherein the signal status value of each signal is calculated based on a signal history of each signal.
15. The method of claim 11 , further comprising obtaining the static weight value for each of the plurality of signals from a predetermined data.
16. The method of claim 11 , wherein calculating the true weight value of each signal further comprises using a formula:
W true ( i )= W init *δ*α
where W true is the true weight, W init is the static weight value assigned to each signal, δ is a probability of data reception or transmission, and α is a value calculated from a history of the previous transmissions of the signal.