Radio (NR) random access response (RAR) synchronization sequence selection
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsAndres Reial, Johan Axnäs, Asbjörn Grövlen, Henrik Sahlin
Life of this patent
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Abstract
According to certain embodiments, a method for use in a network node comprises broadcasting a synchronization signal (SS) to one or more wireless devices. The SS comprises basic information about the network node. The method further comprises receiving a preamble from one of the wireless devices via a random access channel and determining a reference signal (RS) sequence based at least in part on the preamble received via the random access channel and/or the SS that was broadcast to the one or more wireless devices. The method further comprises transmitting a random access response comprising the RS sequence.
Claims37
A method for use in a network node, the method comprising:
- broadcasting a synchronization signal (SS) to one or more wireless devices, the SS comprising basic information relating to the network node;
- receiving a preamble from one of the wireless devices via a random access channel;
- calculating a reference signal (RS) sequence according to a function, wherein input to the function comprises at least the SS and the preamble received via the random access channel;
- and
- transmitting a random access response comprising the RS sequence.
A method for use in a wireless device, the method comprising:
- receiving a synchronization signal (SS) broadcast from a network node, the SS comprising basic information relating to the network node;
- transmitting a preamble to the network node via a random access channel;
- calculating one or more reference signal (RS) sequences according to a function, wherein input to the function comprises at least the SS and the preamble received via the random access channel;
- and
- for each of the determined RS sequences, searching for a random access response comprising the RS sequence.
A network node, comprising:
- one or more interfaces and processing circuitry, the one or more interfaces configured to:
- broadcast a synchronization signal (SS) to one or more wireless devices, the SS comprising basic information relating to the network node;
- and
- receive a preamble from one of the wireless devices via a random access channel;
- the processing circuitry configured to:
- calculate a reference signal (RS) sequence according to a function, wherein input to the function comprises at least the SS and the preamble received via the random access channel;
- wherein the one or more interfaces are further configured to transmit a random access response comprising the RS sequence.
A wireless device, comprising:
- one or more interfaces and processing circuitry, the one or more interfaces configured to:
- receive a synchronization signal (SS) broadcast from a network node, the SS comprising basic information relating to the network node;
- and
- transmit a preamble to the network node via a random access channel;
- the processing circuitry configured to:
- calculate a reference signal (RS) sequence according to a function, wherein input to the function comprises at least the SS and the preamble received via the random access channel;
- the one or more interfaces further configured to, for each of the determined RS sequences, search for a random access response comprising the RS sequence.
A computer program product comprising a non-transitory computer-readable medium storing a computer program, the computer program comprising computer readable instructions for causing processing circuitry to:
- broadcast a synchronization signal (SS) to one or more wireless devices, the SS comprising basic information relating to the network node;
- receive a preamble from one of the wireless devices via a random access channel;
- calculate a reference signal (RS) sequence according to a function, wherein input to the function comprises at least the SS and the preamble received via the random access channel;
- and
- transmit a random access response comprising the RS sequence.
Dependencies are inferred from the claim text.