US Patent No. 10,142,951

SYNCHRONIZATION OF LICENSED ASSISTED ACCESS LONG TERM EVOLUTION (LAA-LTE) OVER SHARED SPECTRUM


Patent No. 10,142,951
Issue Date November 27, 2018
Title Synchronization Of Licensed Assisted Access Long Term Evolution (laa-lte) Over Shared Spectrum
Inventorship Raymond Yuk Chor Kwan, Swindon (GB)
Peter Keevill, Bath (GB)
James Paul Seymour, Long Grove, IL (US)
Rajesh Pazhyannur, Fremont, CA (US)
Patrick Georges Venceslas Charriere, Letcombe Regis (GB)
Assignee Cisco Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 10,142,951

1. A method comprising:obtaining data to be transmitted in a plurality of subframes over a shared spectrum;
transmitting a first reservation message over the shared spectrum to reserve a first portion in the shared spectrum, the first reservation message indicating that an initial synchronization message will be retransmitted as a plurality of retransmitted synchronization messages with a predetermined number of subframes between each of the plurality of retransmitted synchronization messages;
receiving a second reservation message, the second reservation message reserving a second portion in the shared spectrum for a scheduled transmission of remote synchronization messages;
transmitting the initial synchronization message and the plurality of retransmitted synchronization messages during the first portion in the shared spectrum interleaved with the remote synchronization messages during the second portion in the shared spectrum; and
transmitting the data over the shared spectrum according to timing based on the first reservation message.