Browse Prior Art Database

Virtual LTE Inter Cell Interference Coordination (ICIC) for Better Spectrum Efficiency

IP.com Disclosure Number: IPCOM000246678D
Original Publication Date: 2016-Jun-27
Included in the Prior Art Database: 2016-Jun-27
Document File: 4 page(s) / 156K

Publishing Venue

Motorola

Related People

Gabi Ofir: AUTHOR [+3]

Abstract

This invention is new method to influence and manipulate LTE system usage of certain frequencies (RB's) by a secondary communication system by that secondary system sending the LTE system ICIC messages over an X2 interface (as if it was an adjacent LTE eNB). This patent disclosure proposes a method and process to allow a better use of the radio frequency spectrum by enabling different communication systems to operate in frequencies used by LTE or in frequencies near them, simultaneously with the operating LTE communication system. This method would include the sensing of communication activity in certain frequencies and the precise coordination and cooperation between the activity of the different communication systems and the LTE communication system in whose frequencies they want to operate.

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Virtual LTE Inter Cell Interference Coordination (ICIC) for Better Spectrum Efficiency
Gabi Ofir, Itzhak Shperling, Eitan Koren
Motorola Solutions Inc. (MSI)


Background & Problem Statement

One LTE base station (eNB1) performance may be degraded by an adjacent base station (eNB2) using the same frequencies (Resource Blocks, RB’s) for down link transmission.
A method to alleviate this problem is the ICIC (Inter Cell Interference Control) protocol between adjacent LTE base stations (eNB’s) running on the X2 protocol link connection. In ICIC adjacent eNB’s update each other on the frequencies (RB’s) they are using for downlink transmission, so the neighboring eNB would avoid using the same frequencies to avoid mutual interference.
This new invention is a new method to influence and manipulate LTE system usage of certain frequencies (RB’s) by a secondary communication system (not LTE), by that secondary system sending the LTE system ICIC-like messages over an X2 interface (as if it was an adjacent LTE eNB).
This patent disclosure proposes a method and process to allow a better use of the radio frequency spectrum by enabling different communication systems to operate in frequencies used by LTE or in frequencies near them, simultaneously with the operating LTE communication system.
This method would include the sensing of communication activity in certain frequencies and the precise coordination and cooperation between the activity of the different communication systems and the LTE communication system in whose frequencies they want to operate.

The Invention
This invention is new method to influence and manipulate LTE system usage of certain frequencies (RB’s) by a secondary communication system by that secondary system sending the LTE system ICIC messages over an X2 interface (as if it was an adjacent LTE eNB).
This patent disclosure proposes a method and process to allow a better use of the radio frequency spectrum by enabling different communication systems to operate in frequencies used by LTE or in frequencies near them, simultaneously with the operating LTE communication system.
This method would include the sensing of communication activity in certain frequencies and the precise coordination and cooperation between the activity of the different communication systems and the LTE communication system in whose frequencies they want to operate.

Example Use Cases

1. NB LMR communication systems operating in the 700 MHz frequency band near the LTE Band Classes 13 and 14 which are nearby in the 700 MHZ range. This proximity could create mutual interference between LMR and LTE, especially in dual mode (LTE+LMR) user equipment (UE) radios
2. Cognitive Radio use: Open up for LTE use sparsely used frequency bands (such as rarely used military frequencies, incumbent TV’s, incumbent digital microphones, etc. ), by sensing if there is activity in these frequencies
3. Open up LTE frequencies for Direct Mode Operation (DMO) of subscriber units ...