US 2019/0357259 A1 · PHYSICAL RANDOM ACCESS CHANNEL SCHEME FOR WIRELESS NETWORKS USING AN ANALOG BLOOM FILTER

Abstract

This disclosure describes a novel PRACH scheme based on an Analog Bloom Filter, in which user equipment is allowed to transmit multiple sequences to a base station, instead of only one sequence as is the case with the current LTE. A new decoding algorithm is disclosed, which copes with the unique challenges in the signal generated with ZC sequences, such as peak shifting and multiple peaks. In addition, when CFO can be removed the new scheme allows the UE to piggyback log 2 7 bits of information along with the signal. Evaluation shows that the new scheme outperforms the existing PRACH of LTE by more than an order of magnitude in many cases, and therefore is a good candidate as the PRACH for future wireless networks (e.g., 5G).

Claims20

Dependent claims

A device, the device comprising memory and processing circuitry configured to:

receive a signal comprising one or more symbol sequences on a physical random access channel (PRACH);
identify, based on the signal, a first potential active user device and a second potential active user device, wherein to identify the first potential active user device and the second potential active user device comprises:
identify a first signal peak and a second signal peak within the signal;
and
associate the first signal peak to a first potential active user device and the second signal peak to a second potential active user device;
and
determine, using an Analog Bloom Filter (ABF), the first potential active user device is a first actual active user device and the second potential active user device is a second actual active user device from the one or more potential active user devices.

4 more elements

A method, comprising:

receiving a signal comprising one or more symbol sequences on a physical random access channel (PRACH);
identifying, based on the signal, a first potential active user device and a second potential active user device, wherein to identify the first potential active user device and the second potential active user device comprises:
identifying a first signal peak and a second signal peak within the signal;
and
associating the first signal peak to a first potential active user device and the second signal peak to a second potential active user device;
and
determining, using an Analog Bloom Filter (ABF), the first potential active user device is a first actual active user device and the second potential active user device is a second actual active user device from the one or more potential active user devices.

4 more elements

A non-transitory computer-readable medium storing computer-executable instructions that, when executed by at least one processor, configure the at least one processor to perform operations comprising:

receiving a signal comprising one or more symbol sequences on a physical random access channel (PRACH);
identifying, based on the signal, a first potential active user device and a second potential active user device, wherein to identify the first potential active user device and the second potential active user device comprises:
identifying and strengthening a first signal peak and a second signal peak within the signal;
and
associating the first signal peak to a first potential active user device and the second signal peak to a second potential active user device;
and
determining, using an Analog Bloom Filter (ABF), the first potential active user device is a first actual active user device and the second potential active user device is a second actual active user device from the one or more potential active user devices.

4 more elements

Dependencies are inferred from the claim text.

Physical random access channel scheme for wireless networks using an analog bloom filter

Life of this patent

Physical random access channel scheme for wireless networks using an analog bloom filter

Life of this patent

Abstract

Claims20