US Patent No. 10,194,421

METHOD AND APPARATUS FOR WIRELESS COMMUNICATIONS


Patent No. 10,194,421
Issue Date January 29, 2019
Title Method And Apparatus For Wireless Communications
Inventorship Chia-Hung Wei, Taipei (TW)
Hai-Han Wang, Taipei (TW)
Chih-Chiang Wu, Taichung (TW)
Assignee INSTITUTE FOR INFORMATION INDUSTRY, Taipei (TW)

Claim of US Patent No. 10,194,421

1. A method for wireless communications, comprising:transmitting a silence command to a mobile terminal by a network node when a first predetermined condition occurs;
making a secondary component carrier of the mobile terminal transition to a silence state from an activation state according to the silence command and a silence-specific configuration and operate in the silence state according to the silence-specific configuration, wherein the silence-specific configuration is used to configure the mobile terminal by the network node, and the silence state is defined as a state in which the mobile terminal stops signal transmissions to the network node on a secondary cell but remains monitoring downlink control channel and measuring Reference Signal Received Power (RSRP)/Reference Signal Received Quality (RSRQ) on the secondary cell, wherein the secondary cell is served by the network node which uses a secondary component carrier that corresponds to the secondary component carrier of the mobile terminal, which is in a frequency band of a shared spectrum or an unlicensed spectrum;
transmitting a signaling message to the mobile terminal by the network node when a second predetermined condition occurs; and
making the secondary component carrier of the mobile terminal transition to the activation state from the silence state according to the silence-specific configuration and restart or resume message signal transmissions on the secondary cell in accordance with the signaling message;
wherein the signaling message is a de-silence command if a time alignment timer (TAT) associated with the secondary cell is expired when the second predetermined condition occurs, wherein the de-silence command is used to control the mobile terminal to perform a de-silence procedure before the secondary component carrier transitions to the activation state from the silence state;
wherein the silence command comprises a pre-assigned preamble, and the de-silence procedure comprises:
reporting channel state information (CSI) of the secondary cell in accordance with a temporary CSI reporting configuration of the silence-specific configuration;
transmitting the pre-assigned preamble to the network node; and
receiving a timing advance (TA) value from the network node.