Wireless terminal apparatus and wireless communication method

Patent metadata

Field	Value
Publication number	US-2026006519-A1
Application number	US-202218878448-A
Country	US
Kind code	A1
Filing date	Jul 5, 2022
Priority date	Jul 5, 2022
Publication date	Jan 1, 2026
Grant date	—

Abstract

A wireless terminal apparatus includes a plurality of wireless units, a determination unit, a search unit, and a handover unit. The plurality of wireless units wirelessly communicate with a first access point by multi-link which wirelessly connects through a plurality of links. The determination unit determines whether or not there is a quality degradation link having an index value based on reception power smaller than a first threshold among links included in the multi-link. When there is the quality degradation link, the search unit searches for a second access point connectable by the multi-link and capable of handover, by using a search link selected from links included in the multi-link. When there is the second access point, the handover unit switches the connection destination of the search link from the first access point to the second access point.

First claim

1 . A wireless terminal apparatus comprising a processor configured to:
wirelessly communicate with a first access point by multi-link which wirelessly connects through a plurality of links; determine whether or not there is a quality degradation link in which an index value based on reception power is smaller than a first threshold among links included in the multi-link; search for a second access point connectable by the multi-link and capable of handover when there is the quality degradation link, by using a search link selected from links included in the multi-link; and switch a connection destination of the search link from the first access point to the second access point when there is the second access point.

2 . The wireless terminal apparatus according to claim 1 , wherein the processor is configured to select , as the search link, a link having the index value equal to or larger than the first threshold among the links included in the multi-link.

3 . The wireless terminal apparatus according to claim 1 , wherein the processor selects the quality degradation link as the search link.

4 . The wireless terminal apparatus according to claim 1 , wherein, after connection with the second access point by the search link is established, the processor switches a connection destination of remaining links in the multi-link from the first access point to the second access point.

5 . The wireless terminal apparatus according to claim 1 , wherein the processor switches the connection destination of the search link from the second access point to the first access point in a case where an index value when a wireless connection with the second access point is established by the quality degradation link is smaller than a second threshold, the second threshold being larger than the first threshold.

6 . The wireless terminal apparatus according to claim 1 , wherein the processor determines, as the second access point, an access point having an index value of the search link equal to or larger than a second threshold larger than the first threshold.

7 . A wireless communication method comprising:
wirelessly communicating with a first access point by multi-link which wirelessly connects through a plurality of links; determining whether or not there is a first link having an index value based on reception power smaller than a first threshold among links included in the multi-link; searching for a second access point connectable by the multi-link and capable of handover, when there is the first link, by using a second link having the index value equal to or larger than the first threshold among the links included in the multi-link; and switching a connection destination of the second link from the first access point to the second access point when there is the second access point.

Assignees

• Ntt Inc

Inventors

• Kishida Akira
• Abeysekera Hirantha
• Otani Hanae
• Iwatani Junichi
• Asai Yusuke
• Takatori Yasushi
• Otsuki Shinya
• Omiya Riku

Classifications

• H04W36/28

  involving a plurality of connections, e.g. multi-call or multi-bearer connections · CPC title

• H04W36/08

  Reselecting an access point · CPC title

• H04W36/008357

  Determination of target cell based on access point [AP] properties, e.g. AP service capabilities · CPC title

• H04W36/302 Primary

  due to low signal strength · CPC title

• H04W36/0069

  in case of dual connectivity, e.g. decoupled uplink/downlink · CPC title