| 发明名称 |
DEVICE-TO-DEVICE COMMUNICATIONS APPARATUS AND METHODS |
| 摘要 |
A method in a wireless terminal (261) which is in wireless communications with a radio access node (22) over a radio interface (24) comprises using a time alignment timer (50H) to determine how long the wireless terminal (261) considers a serving cell associated with a timing advance group to be time uplink aligned. The wireless terminal (261) does not perform device-to-device (D2D) communications with another wireless terminal (262) using network-allocated resources of the serving cell when the time alignment timer (50H) expires. Upon expiration of the time alignment timer (50H) the wireless terminal (261) uses wireless terminal autonomous selected radio resources for the device-to-device (D2D) communications with the another wireless terminal (262). |
| 申请公布号 |
US2015271841(A1) |
申请公布日期 |
2015.09.24 |
| 申请号 |
US201514660622 |
申请日期 |
2015.03.17 |
| 申请人 |
Sharp Laboratories of America, Inc. |
发明人 |
YAMADA Shohei;SHENG Jia;KOWALSKI John Michael |
| 分类号 |
H04W72/12;H04W76/02 |
主分类号 |
H04W72/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method in a wireless terminal which is in wireless communications with a radio access node over a radio interface, the method comprising:
using a time alignment timer to determine how long the wireless terminal considers a serving cell associated with a timing advance group to be time uplink aligned; the wireless terminal not performing device-to-device (D2D) communications with another wireless terminal using network-allocated resources of the serving cell when the time alignment timer expires. |
| 地址 |
Camas WA US |
