Load-aware variable periodic resource allocation
A method for a network node for adjusting a periodicity of periodic resources allocated to a wireless device (WD) in a wireless network. The periodicity defines a period of time between periodic resources allocated to the WD. A periodic resource is allocated to the WD to be used by the WD to transmit data to the network node, where the allocation is based at least in part on a periodicity. The method includes determining whether the allocation of the periodic resource to the WD is one of successful and not successful based on whether there is an available resource having the periodicity of the periodic resource. The periodicity of periodic resources is adjusted based on whether or not the allocation of the periodic resource to the WD is successful.
1. A method for a network node for adjusting a periodicity of periodic resources allocated to a wireless device, WD, in a wireless network, the periodicity defining a period of time between periodic resources allocated to the WD, the method comprising:
allocating a periodic resource to the WD to be used by the WD to transmit data to the network node, the allocation being based at least in part on a periodicity;
determining whether the allocation of the periodic resource to the WD is one of successful and not successful based on whether there is an available resource having the periodicity of the periodic resource; and
adjusting the periodicity of periodic resources based on whether or not the allocation of the periodic resource to the WD is successful.
2. The method of claim 1 , wherein adjusting the periodicity is further based on an output generated by one of an integral controller and proportional-integral-derivative controller.
3. The method of claim 1 , wherein adjusting the periodicity further comprises:
determining upStep as an amount of increase in the periodicity, given by
upStep
=
1
-
maxBlockProb
maxBlockProb
×
downStep
,
downStep being a configurable parameter denoting an amount of decrease in periodicity, maxBlockProb being a configurable parameter that denotes a maximum blocking probability of the WD requiring an unavailable periodic resource.
4. The method of claim 3 , wherein adjusting the periodicity further comprises:
decrementing the periodicity by an amount equal to downStep if the allocation of the periodic resource to the WD is successful; and
incrementing the periodicity by an amount equal to upStep if the allocation of the periodic resource to the WD is not successful.
5. The method of claim 1 , wherein adjusting the periodicity is further based on a type of periodic resource being allocated by the network node.
6. The method of claim 1 , wherein adjusting the periodicity further comprises:
updating the periodicity so that the periodicity is within a configurable range.
7. The method of claim 1 , wherein adjusting the periodicity is further based on one of a plurality of predefined classes of WD users.
8. The method of claim 1 further comprising:
determining that periodic resources are unavailable to be allocated to the WD;
identifying a plurality of WDs having allocated periodic resources;
obtaining a periodicity for each of the identified WDs of the plurality of WDs to determine a new periodicity, p new , to be assigned to the WD and each of the identified WDs, p new being expressed as:
p
new
=
f
(
n
+
1
∑
i
=
1
n
1
p
i
)
,
f being a function that rounds up to a next supported periodicity, n being a total number of identified WDs with allocated periodic resources, i being an index of summation for an identified WDs of the identified WDs, p i being the periodicity of the identified WD; and
assigning periodicity, p new , to the WD and each of the identified WDs.
9. The method of claim 8 , wherein identifying a WD for inclusion in the plurality of WDs is based at least in part on predefined criteria including one of a priority of the WD, an activity of a WD on the wireless network, periodicity of a WD, and a periodicity benefit of the WD.
10. The method of claim 1 , wherein allocating a periodic resource is initiated when a need to allocate the periodic resource to the WD is determined.
11. The method of claim 1 , wherein the periodic resource is one of a physical uplink control channel, PUCCH, scheduling request, SR, resource, a PUCCH channel quality indicator, CQI, resource, and a periodic sounding reference signal, SRS, the periodic resource being used in one of Long Term Evolution, LTE, and New Radio, NR.
12. A network node configured to adjust a periodicity of periodic resources allocated to a wireless device, WD, in a wireless network, the periodicity defining a period of time between periodic resources allocated to the WD, the network node comprising:
processing circuitry, the processing circuitry having a processor and a memory, the processing circuitry configured to:
allocate a periodic resource to the WD to be used by the WD to transmit data to the network node, the allocation being based at least in part on a periodicity;
determine whether the allocation of the periodic resource to the WD is one of successful and not successful based on whether there is an available resource having the periodicity of the periodic resource; and
adjust the periodicity of periodic resources based on whether or not the allocation of the periodic resource to the WD is successful.
13. The network node of claim 12 , wherein adjusting the periodicity is further based on an output generated by one of an integral controller and proportional-integral-derivative controller.
14. The network node of claim 12 , wherein adjusting the periodicity further comprises:
determining upStep as an amount of increase in the periodicity, given by
upStep
=
1
-
maxBlockProb
maxBlockProb
×
downStep
,
downStep being a configurable parameter denoting an amount of decrease in periodicity, maxBlockProb being a configurable parameter that denotes a maximum blocking probability of the WD requiring an unavailable periodic resource.
15. The network node of claim 14 , wherein adjusting the periodicity further comprises:
decrementing the periodicity by an amount equal to downStep if the allocation of the periodic resource to the WD is successful; and
incrementing the periodicity by an amount equal to upStep if the allocation of the periodic resource to the WD is not successful.
16. The network node of claim 12 , wherein adjusting the periodicity is further based on a type of periodic resource being allocated by the network node.
17. The network node of claim 12 , wherein adjusting the periodicity further comprises:
updating the periodicity so that the periodicity is within a configurable range.
18. The network node of claim 12 , wherein adjusting the periodicity is further based on one of a plurality of predefined classes of WD users.
19. The network node of claim 12 , wherein the processing circuitry is further configured to:
determine that periodic resources are unavailable to be allocated to the WD;
identify a plurality of WDs having allocated periodic resources;
obtain a periodicity for each of the identified WDs of the plurality of WDs to determine a new periodicity, p new , to be assigned to the WD and each of the identified WDs, p new being expressed as:
p
new
=
f
(
n
+
1
∑
i
=
1
n
1
p
i
)
,
f being a function that rounds up to a next supported periodicity, n being a total number of identified WDs with allocated periodic resources, i being an index of summation for an identified WDs of the identified WDs, p i being the periodicity of the identified WD; and
assign periodicity, p new , to the WD and each of the identified WDs.
20. The network node of claim 19 , wherein identifying a WD for inclusion in the plurality of WDs is based at least in part on predefined criteria including one of a priority of the WD, an activity of a WD on the wireless network, periodicity of a WD, and a periodicity benefit of the WD.
21. The network node of claim 12 , wherein allocating a periodic resource is initiated when a need to allocate the periodic resource to the WD is determined.
22. The network node of claim 12 , wherein the periodic resource is one of a physical uplink control channel, PUCCH, scheduling request, SR, resource, a PUCCH channel quality indicator, CQI, resource, and a periodic sounding reference signal, SRS, the periodic resource being usable in one of Long Term Evolution, LTE, and New Radio, NR.