Device-to-device synchronization

A device and device communication technology, applied in the direction of synchronization device, connection management, power management, etc., can solve the problem of no coverage tunnel and so on

Active Publication Date: 2017-02-22
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a WTRU may not have coverage for tunnels, basements, or areas where network service is disrupted due to natural disasters, terrorist attacks, etc.

Method used

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Examples

Experimental program
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Embodiment Construction

[0039] Illustrative embodiments will now be described in detail with reference to the accompanying drawings. While this description provides specific examples of possible implementations, it should be noted that the details are intended to be exemplary and in no way limit the scope of the application.

[0040] Figure 1A is a system diagram of an example communication system 100 in which one or more disclosed embodiments may be implemented. The communication system 100 may be a multiple access system that provides content, such as voice, data, video, messaging, broadcast, etc., to multiple wireless users. The communication system 100 can enable multiple wireless users to access these contents through the sharing of system resources (including wireless bandwidth). For example, the communication system 100 may use one or more channel access methods such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orth...

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Abstract

A wireless transmit receive unit (WTRU) may be operated in a first scheduling mode for device-to-device communication. In the first scheduling mode, a network entity may schedule resources to be used by the WTRU for device-to-device communications. The WTRU may detect that a radio link failure (RLF) timer is running or has been started. The WTRU may switch from the first scheduling mode for device-to-device communication to a second scheduling mode for device-to-device communication in response to detecting that the radio link failure timer is running or has been started. In the second scheduling mode, the WTRU may select a resource from a resource pool for the WTRU to use for one or more device-to-device communications.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 61 / 955,747, filed March 19, 2014, U.S. Provisional Application No. 61 / 955,746, filed March 19, 2014, U.S. Provisional Application No. 6, filed May 7, 2014 .61 / 990,049, U.S. Provisional Application No. 62 / 032,373, filed August 1, 2014, U.S. Provisional Application No. 62 / 075,524, filed November 5, 2014, the entire contents of which are incorporated by reference at this. Background technique [0003] Direct device-to-device (D2D) communication can be used in wireless networks. D2D communication may refer to wireless communication transmissions exchanged directly between two or more Wireless Transmit / Receive Units (WTRUs), rather than communication routed through wireless communication infrastructure such as base stations or access points (e.g., although wireless infrastructure facility may be used to configure D2D sessions and / or schedule D2D transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W72/12
CPCH04W56/002H04W72/12H04W76/19H04W76/14H04W76/23H04W72/02H04W72/25H04W52/383H04W92/18H04W76/18H04W72/121
Inventor S·考尔D·帕尼赵宇昕B·佩尔蒂埃
Owner INTERDIGITAL PATENT HLDG INC
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