Controlling cyclic shift for demodulation reference symbols
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsDavid Sandberg, Mats Åhlander
Life of this patent
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Abstract
It is presented a method for controlling cyclic shift for demodulation reference symbols for uplink communication in a cellular communication network. The method is performed in a network node and comprises the steps of: determining a first cyclic shift parameter for demodulation reference symbols based on a current subframe index; generating a control message comprising the first cyclic shift parameter; and transmitting the control message to a wireless device of the cellular communication network. Corresponding network nodes, computer program and computer program product are also presented.
Claims18
A method in a network node for determining a cyclic shift for demodulation reference symbols for uplink communications in a cellular communication network, the method comprising:
- determining a first cyclic shift parameter for the demodulation reference symbols based on a current subframe index, wherein the determining includes utilizing the same first cyclic shift parameter for a number of subframes that corresponds to a round trip time for Hybrid Automatic Repeat Request (HARQ);
- generating a control message comprising the first cyclic shift parameter;
- and
- transmitting the control message to a first wireless device of the cellular communication network.
A network node for determining a cyclic shift for demodulation reference symbols for uplink communications in a cellular communication network, the network node comprising:
- a processor;
- and
- a memory storing instructions that, when executed by the processor, cause the network node to:
- determine a first cyclic shift parameter for the demodulation reference symbols based on a current subframe index, which includes utilizing the same first cyclic shift parameter for a number of subframes that corresponds to a round trip time for Hybrid Automatic Repeat Request (HARQ);
- generate a control message comprising the first cyclic shift parameter;
- and
- transmit the control message to a first wireless device of the cellular communication network.
A non-transitory machine readable medium having instructions which, when executed by one or more processors of a device, cause the device to determine a cyclic shift for demodulation reference symbols for uplink communications in a cellular communication network by performing operations comprising:
- determining a first cyclic shift parameter for the demodulation reference symbols based on a current subframe index, wherein the determining includes utilizing the same first cyclic shift parameter for a number of subframes that corresponds to a round trip time for Hybrid Automatic Repeat Request (HARQ);
- generating a control message comprising the first cyclic shift parameter;
- and
- transmitting the control message to a first wireless device of the cellular communication network.
Dependencies are inferred from the claim text.