Method for allocating cell index for WLAN network for LTE-WLAN aggregation system and a device therefor

Patent metadata

Field	Value
Publication number	US-10470139-B2
Application number	US-201615558521-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Apr 18, 2015
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting a power headroom reporting for LTE-WLAN aggregation system, the method comprising: configuring Long Term Evolution (LTE) network and Wireless-LAN (WLAN) network over which the UE transfers data in LTE-WLAN aggregation system; receiving a cell index used for the WLAN network from an eNB, wherein the cell index for WLAN network is currently not used for any cell of the LTE network configured for the UE; and transmitting a Medium Access Control (MAC) Control Element (CE) including information for the WLAN network with the cell index, wherein the cell index indicates that the MAC CE includes the information for the WLAN network.

First claim

What is claimed is:

1. A method for a User Equipment (UE) operating in a wireless communication system, the method comprising:
configuring Long Term Evolution (LTE) network and Wireless-LAN (WLAN) network over which the UE transfers data in LTE-WLAN aggregation system;
receiving a cell index used for the WLAN network from an eNB, wherein the cell index for WLAN network is currently not used for any cell of the LTE network configured for the UE; and
transmitting a Power Headroom Reporting (PHR) Medium Access Control (MAC) Control Element (CE) including information for the WLAN network with the cell index,
wherein the cell index indicates that the PHR MAC CE includes the information for the WLAN network, and
wherein, when the UE sets a value of a Ci field corresponding to the cell index for the WLAN network to 1, the PHR MAC CE includes power status information for the WLAN network in fields corresponding to the Ci field.

2. The method according to claim 1 , wherein the information for the WLAN network is information of power status for data transmission over WLAN network.

3. The method according to claim 1 , wherein the power status information for the WLAN network is an actual transmission power with which the UE transmits data over the WLAN network.

4. The method according to claim 3 , wherein if there is the actual transmission over the WLAN network, the power status for data transmission over the WLAN network is a difference between maximum transmit power over WLAN network and the actual transmission power over WLAN network, and
if there is not the actual transmission over WLAN network, the power status for data transmission over WLAN network is a difference between maximum transmit power over WLAN network and a virtual transmission power over WLAN network.

5. The method according to claim 4 , wherein the virtual transmission power over WLAN access network is calculated as if a transmission over WLAN occurs according to the pre-defined WLAN resource allocation in a subframe for which power status is calculated.

6. A User Equipment (UE) operating in a wireless communication system, the UE comprising:
a Radio Frequency (RF) module; and
a processor configured to:
control the RF module,
configure Long Term Evolution (LTE) network and Wireless-LAN (WLAN) network over which the UE transfers data in LTE-WLAN aggregation system,
receive a cell index used for the WLAN network from an eNB, wherein the cell index for WLAN network is currently not used for any cell of the LTE network configured for the UE, and
transmit a Power Headroom Reporting (PHR) Medium Access Control (MAC) Control Element (CE) including information for the WLAN network with the cell index,
wherein the cell index indicates that the PHR MAC CE includes the information for the WLAN network, and
wherein, when the UE sets a value of a Ci field corresponding to the cell index for the WLAN network to 1, the PHR MAC CE includes power status information for the WLAN network in fields corresponding to the Ci field.

7. The UE according to claim 6 , wherein the information for the WLAN network is information of power status for data transmission over WLAN network.

8. The UE according to claim 7 , wherein the power status information for the WLAN network is an actual transmission power with which the UE transmits data over the WLAN network.

9. The UE according to claim 8 , wherein if there is the actual transmission over the WLAN network, the power status for data transmission over the WLAN network is a difference between maximum transmit power over WLAN network and the actual transmission power over WLAN network, and
if there is not the actual transmission over WLAN network, the power status for data transmission over WLAN network is a difference between maximum transmit power over WLAN network and a virtual transmission power over WLAN network.

10. The UE according to claim 9 , wherein the virtual transmission power over WLAN access network is calculated as if a transmission over WLAN occurs according to the pre-defined WLAN resource allocation in a subframe for which power status is calculated.

Assignees

• Lg Electronics Inc

Inventors

• Yi Seungjune
• Lee Sunyoung

Classifications

• H04W72/51

  based on terminal or device properties · CPC title

• H04W76/15

  Setup of multiple wireless link connections · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H04W52/38

  TPC being performed in particular situations · CPC title