US 9,854,597 B2Granted

Method and communication apparatus for resource allocation in wireless communication network

AssigneeCellos Software Ltd

InventorXiaoqin Chen

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Abstract

The invention provides method and communication apparatus for resource allocation in wireless communication network. The resource allocation method comprises: receiving, at a cluster-level scheduler, channel quality metrics of each user equipment (UE) in a cluster of at least two radio remote head units (RHUs); calculating, at the cluster-level scheduler, a reference signal received quality (RSRQ) metric of each UE in the cluster according to the received channel quality metrics of each UE; performing, at each cell-level scheduler in the cluster, cell-level packet scheduling within a pre-configured duration, each cell-level scheduler corresponding to one of the RHUs; classifying each UE to be one of predetermined categories according to the calculated RSRQ metric of the UE; and determining, at the cluster-level scheduler, whether to adjust the cell-level packet scheduling within the pre-configured duration at each cell-level scheduler according to the classified category of each UE scheduled within the pre-configured duration.

Claims16

Dependent claims

A method for resource allocation in a wireless communication network, comprising:

receiving, at a cluster-level scheduler, channel quality metrics of each user equipment (UE) in a cluster of at least two radio remote head units (RHUs) in the wireless communication network;
calculating, at the cluster-level scheduler, a reference signal received quality (RSRQ) metric of each UE in the cluster according to the received channel quality metrics of each UE;
performing, at each cell-level scheduler in the cluster, cell-level packet scheduling within a pre-configured duration, each cell-level scheduler corresponding to one of the at least two RHUs in the cluster;
classifying each UE in the cluster to be one of predetermined categories according to the calculated RSRQ metric of each UE;
and
determining, at the cluster-level scheduler, whether to adjust the cell-level packet scheduling within the pre-configured duration at each cell-level scheduler according to the classified category of each UE scheduled within the pre-configured duration,
wherein the channel quality metrics of each UE includes at least one channel quality indication (CQI) value and reference signal received power (RSRP) values of each UE;
wherein the RSRQ metric of each UE is calculated according to the following Expression:
RSRQ
p
⁡
(
t
+
1
)
=
RSRP
S
⁡
(
t
)
∑
i
=
1
ϕ
⁢
RSRP
i
⁡
(
t
)
wherein RSRQP(t+1) refers to a predicted reference signal received quality metric of the UE at time t+1, RSRPs(t) refers to reference signal received power of a serving cell received at time t, Σi=1Φ RSRPi(t) is sum of a predicted inter-cell co-channel interference at time t+1 calculated from reference signal received power of interference cells at time t, Φ is a number of interfering cells to the UE.

33 more elements

A communication apparatus for resource allocation in a wireless communication network, comprising:

a plurality of networking interfaces each connected to a radio remote head unit (RHU) in a cluster of at least two RHUs in the wireless communication network;
a plurality of cell-level schedulers each corresponding to one of the at least two RHUs in the cluster;
and
a cluster-level scheduler connected to the plurality of cell-level schedulers, wherein the cluster-level scheduler comprises:
a metrics calculator, arranged to communicate with the RHUs in the cluster to receive channel quality metrics of each user equipment (UE) in the cluster;
the metrics calculator, further configured to calculate a reference signal received quality (RSRQ) metric of each UE in the cluster according to the received channel quality metrics of each UE;
a classifier, arranged to communicate with the metrics calculator and configured to classify each UE to be one of predetermined categories according to the RSRQ metric of each UE calculated by the metrics calculator;
and
a resource allocator, arranged to communicate with the classifier and the plurality of cell-level schedulers and configured to determine whether to adjust a cell-level packet scheduling within a pre-configured duration at each cell-level scheduler according to the classified category of each UE scheduled within the pre-configured duration;
wherein the channel quality metrics of each UE includes at least one channel quality indication (CQI) value and reference signal received power (RSRP) values of each UE;
wherein the metrics calculator is further configured to calculate the RSRQ metric of each UE according to the following Expression:
RSRQ
p
⁡
(
t
+
1
)
=
RSRP
S
⁡
(
t
)
∑
i
=
1
ϕ
⁢
RSRP
i
⁡
(
t
)
wherein RSRQP(t+1) refers to a predicted reference signal received quality metric of the UE at time t+1, RSRPs(t) refers to reference signal received power of a serving cell received at time t, Σi=1Φ RSRPi(t) is sum of a predicted inter-cell co-channel interference at time t+1 calculated from reference signal received power of interference cells at time t, Φ is a number of interfering cells to the UE.

36 more elements

A communication apparatus for resource allocation in a wireless communication network, comprising a cluster-level scheduler which includes:

a metrics calculator, arranged to communicate with a plurality of RHUs in a cluster in the wireless communication network to receive channel quality metrics of each user equipment (UE) in the cluster;
the metrics calculator, further configured to calculate a reference signal received quality (RSRQ) metric of each UE in the cluster according to the received channel quality metrics of each UE;
a classifier, arranged to communicate with the metrics calculator and configured to classify each UE to be one of predetermined categories according to the calculated RSRQ metric of each UE;
and
a resource allocator, arranged to communicate with the classifier and the plurality of cell-level schedulers and configured to determine whether to adjust a cell-level packet scheduling within a pre-configured duration at each of cell-level schedulers according to the category of each UE scheduled within the pre-configured duration;
wherein the channel quality metrics of each UE includes at least one channel quality indication (CQI) value and reference signal received power (RSRP) values of each UE;
wherein the metrics calculator is further configured to calculate the RSRQ metric of each UE according to the following Expression:
RSRQ
p
⁡
(
t
+
1
)
=
RSRP
S
⁡
(
t
)
∑
i
=
1
ϕ
⁢
RSRP
i
⁡
(
t
)
wherein RSRQP(t+1) refers to a predicted reference signal received quality metric of the UE at time t+1, RSRPs(t) refers to reference signal received power of a serving cell received at time t, Σi=1Φ RSRPi(t) is sum of a predicted inter-cell co-channel interference at time t+1 calculated from reference signal received power of interference cells at time t, Φ is a number of interfering cells to the UE.

32 more elements

Dependencies are inferred from the claim text.