Slotted Access For Wireless Communication Devices And Control Thereof

Patent metadata

Field	Value
Publication number	US-2016249387-A1
Application number	US-201615145524-A
Country	US
Kind code	A1
Filing date	May 3, 2016
Priority date	Apr 2, 2011
Publication date	Aug 25, 2016
Grant date	—

Abstract

An example method provides a method of determining access times and channels for a wireless communication device. One embodiment includes selecting, at a wireless communication device, one of a plurality of time intervals in a periodically repeating access cycle for transmission of an access signal based on an identification number identifying the wireless communication device, negotiating a preamble assignment for the selected one of the plurality of time intervals, and transmitting the access signal over an access channel in the selected one of the plurality of time intervals using a preamble corresponding to the preamble assignment.

First claim

1 . A method comprising:
receiving, at a machine-type communication (MTC) device from a network node, at a power-up initialization stage of the MTC device, a pre-assigned access slot and preamble for transmission of an access signal; and for one or more future access attempts, transmitting, at the MTC device, the access signal over an access channel in the pre-assigned access slot using the pre-assigned preamble.

2 . The method of claim 1 wherein the pre-assigned preamble for the pre-assigned access slot is unique to the MTC device relative to other MTC devices in a cell.

3 . The method of claim 1 further comprising, at the network node:
indicating at least a first time slot of a plurality of time slots, defining a blocking time slot, in which access should be prevented; and
preventing transmission of access attempts from MTC devices having a pre-assigned access slot corresponding to the blocking time slot.

4 . A method, comprising:
constraining a machine-type communication (MTC) device to transmit access signals over an access channel corresponding to a pre-assigned preamble assignment received from a network node, during a pre-assigned time slot received from the network node, the pre-assigned time slot comprising one of a plurality of time slots that make up a periodically repeating access cycle.

5 . The method of claim 4 wherein the pre-assigned preamble for the pre-assigned time slot is unique to the MTC device relative to other MTC devices in a cell.

6 . The method of claim 4 further comprising, at the network node:
sending a blocking signal indicating at least a first time slot of a plurality of time slots, defining a blocking time slot, in which access signals should be prevented; and
preventing transmission of access attempts from MTC devices having a pre-assigned access slot corresponding to the blocking time slot.

7 . A machine-type communication (MTC) device comprising a processor and an associated memory, the processor configured to
receive, from a network node, at a power-up initialization stage of the MTC device, a pre-assigned access slot and preamble for transmission of an access signal; and for one or more future access attempts, transmit the access signal over an access channel in the preassigned access slot using the pre-assigned preamble.

8 . A network node comprising a processor and an associated memory, the processor configured to
constrain a machine-type communication (MTC) device to transmit access signals over an access channel corresponding to a pre-assigned preamble assignment received from the network node, during a pre-assigned time slot received from the network node, the pre-assigned time slot comprising one of a plurality of time slots that make up a periodically repeating access cycle.

9 . The network node of claim 8 , the processor further configured to
send a blocking signal indicating at least a first time slot of a plurality of time slots, defining a blocking time slot, in which access signals should be prevented; and prevent transmission of access attempts from MTC devices having a pre-assigned access slot corresponding to the blocking time slot.

Assignees

• Alcatel Lucent

Inventors

• Zou Jialin
• Palat Sudeep
• Chen Yu

Classifications

• H04W4/005

  Electricity · mapped topic

• H04W74/0841 Primary

  with collision treatment · CPC title

• H04W74/002

  Transmission of channel access control information · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title