SLOTTED ACCESS FOR WIRELESS COMMUNICATION DEVICES AND CONTROL THEREOF

• US 20140016624A1
• Filed: 04/02/2011
• Published: 01/16/2014
• Est. Priority Date: 04/02/2011
• Status: Active Grant

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Zou, Jialin, Palat, Sudeep, Chen, Yu
• Granted Patent: US 9,380,606 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 74/0841 with collision treatment

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.

Claims

1. A method comprising:

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, the selection being performed based on an identification number identifying the wireless communication device;

negotiating, at the wireless communication device, a preamble assignment for the selected one of the plurality of time intervals; and

transmitting, at the wireless communication device, 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.

2. The method of claim 1 wherein negotiating the preamble comprises:

requesting the preamble assignment for the selected one of the plurality of time intervals from a network node; and

receiving the preamble assignment for the selected one of the plurality of time intervals from the network node.

3. The method of claim 1 wherein the preamble assignment for the selected one of the plurality of time intervals is unique to the wireless communication device.

4. The method of claim 1 further comprises:

receiving a blocking signal indicating at least a first time interval of the plurality of time intervals in which access should be prevented; and

blocking transmission of 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 based on the blocking signal.

5. The method of claim 1 further comprising defining the plurality of time intervals in the access cycle based on synchronization information broadcast over an air interface to the wireless communication device so that the wireless communication device is synchronized with other wireless communication devices on the same access cycle with the same numbering of the time intervals.

6. The method of claim 5 wherein the plurality of time intervals are a plurality of time slots in the periodically repeating access cycle, and wherein selecting one of the plurality of time intervals comprises selecting one of the plurality of time slots based on a slot numbering comprising system frame number associated with the selected one of the slots and broadcast over the air interface.

7. The method of claim 6 wherein selecting one of the plurality of time slots comprises selecting a time slot associated with a system frame number when the system frame number is equal to the identification number modulo a period of the access cycle.

8. The method of claim 6 wherein selecting one of the plurality of time slots comprises selecting a time slot associated with a system frame number when the system frame number is equal to a selected portion or permutation of the identification number.

9. The method of claim 6 wherein selecting one of the plurality of time slots comprises selecting a time slot associated with a system frame number when the system frame number is equal to a hash of the identification number.

10. The method of claim 1 wherein a period of the access cycle is equal to a period of a paging cycle for the wireless communication device, and wherein selecting said one of the plurality of time intervals for the access signal comprises selecting a time interval immediately following a time interval assigned for paging the wireless communication device.

11. The method of claim 1 wherein selecting said one of the plurality of time intervals comprises selecting one of the plurality of time intervals in an access cycle determined by a reporting interval for the wireless communication device.