Backwards-compatible narrowband physical random access channel (NPRACH) for extended range
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsXingqin Lin, Olof Liberg
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Abstract
An example method in a wireless device operating in a wireless network comprises generating a random access preamble signal and transmitting the random access preamble signal. The generated random access preamble signal comprises a random access symbol group that comprises a plurality of consecutive symbols, where each of the plurality of consecutive symbols being modulated on a corresponding subcarrier frequency and each of the plurality of consecutive symbols corresponding to a truncated sinusoid of 3.75/N kHz, with N>1.
Claims18
A method, in a wireless device operating in a wireless network, the method comprising:
- generating a random access preamble signal;
- and
- transmitting the random access preamble signal;
- wherein the generated random access preamble signal comprises a random access symbol group that consists of 6/N consecutive symbols, 6/N being an integer greater than or equal to two, each of the consecutive symbols of the random access symbol being modulated on a corresponding subcarrier frequency and each of the consecutive symbols of the random access symbol group corresponding to a truncated sinusoid of 3.75/N KHz, with N>1.
A wireless device comprising:
- a radio transceiver configured to communicate with a wireless network;
- and
- one or more processing circuits operatively coupled to the radio transceiver and configured to:
- generate a random access preamble signal;
- and
- transmit the random access preamble signal, via the radio transceiver;
- wherein the generated random access preamble signal comprises a random access symbol group that consists of 6/N consecutive symbols, 6/N being an integer greater than or equal to two, each of the consecutive symbols of the random access symbol being modulated on a corresponding subcarrier frequency and each of the consecutive symbols of the random access symbol group corresponding to a truncated sinusoid of 3.75/N kHz, with N>1.
A method, in a wireless access node operating in a wireless network, the method comprising:
- receiving a radio frequency signal;
- and
- detecting a random access preamble signal in the received radio frequency signal;
- wherein the detected random access preamble signal comprises a random access symbol group that comprises a random access symbol group that consists of 6/N consecutive symbols, 6/N being an integer greater than or equal to two, each of the consecutive symbols of the random access symbol being modulated on a corresponding subcarrier frequency and each of the consecutive symbols of the random access symbol group corresponding to a truncated sinusoid of 3.75/N kHz, with N>1.
A wireless access node comprising:
- a radio transceiver configured to communicate with one or more wireless devices;
- and
- one or more processing circuits operatively coupled to the radio transceiver and configured to:
- receive a radio frequency signal;
- and
- detect a random access preamble signal in the received radio frequency signal;
- wherein the detected random access preamble signal comprises a random access symbol group that consists of 6/N consecutive symbols, 6/N being an integer greater than or equal to two, each of the consecutive symbols of the random access symbol being modulated on a corresponding subcarrier frequency and each of the consecutive symbols of the random access symbol group corresponding to a truncated sinusoid of 3.75/N kHz, with N>1.
Dependencies are inferred from the claim text.