Uplink resource allocation in a unidirectional single frequency network arrangement for high speed trains

A network node configured to be connected to a plurality of antenna nodes that are located along a constrained path where a plurality of wireless communication devices are located, the network node comprising input/output circuitry, a processor and a memory, said memory containing instructions executable by said processor whereby said network node is operative to:

• control the antenna nodes to maintain reception radio lobes substantially along the path such that the wireless communication devices can perform uplink radio communication with the network node via the reception radio lobes,
• detect at least one radio frequency, RF, signal,
• determine that said detected at least one RF signal originates from a respective wireless communication device of a specific subset among said plurality of wireless communication devices, said specific subset comprising wireless communication devices that are associated with a common radio frequency offset, and
• allocate, for all wireless communication devices in said specific subset of wireless communication devices, a common uplink radio communication resource.

A nontransitory computer readable storage medium comprising a computer program comprising instructions which, when executed on at least one processor in a network node, cause the network node to carry out a method, wherein the network node is connected to a plurality of antenna nodes that are located along a constrained path where a plurality of wireless communication devices are located, and wherein the method comprises:

• controlling the antenna nodes to maintain reception radio lobes substantially along the path such that the wireless communication devices can perform uplink radio communication with the network node via the reception radio lobes,
• detecting at least one radio frequency, RF, signal,
• determining that said detected at least one RF signal originates from a respective wireless communication device of a specific subset among said plurality of wireless communication devices, said specific subset comprising wireless communication devices that are associated with a common radio frequency offset, and
• allocating, for all wireless communication devices in said specific subset of wireless communication devices, a common uplink radio communication resource.