ProSe Reference Sensitivity Measurement RF Configuration
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Solution Overview
Problem
The demand for Device to Device (D2D) communication, also known as Proximity Service (ProSe), has increased due to social network service requests, but existing technologies lack defined transmission and reception requirements for D2D communication, particularly in scenarios where D2D communication uses the uplink band, which is typically reserved for FDD communication systems.
Innovation Solution
A method and user equipment are proposed to measure reference sensitivity (REFSENS) for ProSe communication by configuring the radio frequency (RF) unit to set specific uplink center frequencies and channel bandwidths for E-UTRA bands, such as 28 and 2, to manage interference and ensure effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication uses uplink band in FDD system, then communication flexibility is improved, but interference management becomes more difficult
Solution Approach 1:
The patent applies parameter changes by configuring specific RF parameters including uplink center frequency (1922.5 MHz for Band 1, 1752.5 MHz for Band 4), channel bandwidth (5 MHz), and reference signal bandwidth (1.08 MHz) to optimize D2D communication performance while managing interference in FDD uplink bands
2Measurement precision
If RF unit measures reference sensitivity with multiple band configurations, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements universality by creating a unified reference sensitivity measurement method that works across multiple E-UTRA bands (Band 1, Band 4, Band 28, Band 2) using consistent RF configuration procedures and measurement protocols, allowing the same measurement framework to serve multiple band combinations
Data Source
AI summary
One disclosure of the present specification provides a method for measuring reference sensitivity (REFSENS) for proximity service (ProSe) communication. The method may comprise a step of establishing an uplink center frequency of band 1 of a cellular base station operating as an interference source to be 1922.5 MHz in order to measure the REFSENS, and adjusting a radio frequency (RF) unit in order to establish a channel bandwidth to be 5 MHz, in case that evolved universal terrestrial radio access (E-UTRA) band 1 is established for communication with the cellular base station and E-UTRA band 28 is established for ProSe communication; and a step of establishing an uplink center frequency of band 4 of the cellular base station operating as the interference source to be 1752.5 MHz in order to measure the REFSENS, and adjusting the RF unit in order to establish a channel bandwidth to be 5 MHz, in case that E-UTRA band 4 is established for communication with the cellular base station and E-UTRA band 2 is established for ProSe communication.