Browse Prior Art Database

Use of position, velocity and direction parameters in UE registration procedure (normal, periodic or a new term speed based discussed in this innovation) to optimize list of registration areas in registration accept.

IP.com Disclosure Number: IPCOM000198225D
Original Publication Date: 2010-Jul-31
Included in the Prior Art Database: 2010-Jul-31
Document File: 3 page(s) / 50K

Publishing Venue

Motorola

Related People

Gupta, Vagish: INVENTOR [+2]

Abstract

Speed based advanced random registration as discussed in the paper means that when the UE’s speed crosses a “speed threshold” (which may be a fixed threshold for all of the UEs or a threshold which is randomly chosen by each UE), the UE will attempt to perform a registration after a random delay time (within a certain maximum limit of course , e.g. 30 seconds). It will attempt to perform this registration even though there is no change in the registration area. This may enable NW to give a list of registration areas in advance where UE may be heading to. Note: Speed and direction of the UE can be determined in anyways e.g. using GPS or any other sophisticated device, or methods mentioned in 3GPP (For example the UE could decide to perform the speed based registration if it becomes “fast moving” according to the 3GPP definition of “fast moving, i.e. at least Ncr reselections in Tcrmax seconds. And it could send the last few cells that it has been on in order so that the network could determine its general direction of motion– rather than sending its direction of motion. With this solution, the UE would not necessarily need to have GPS capabilities in order to implement the speed based registration.), or any other method.

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Speed based advanced random registration

By Vagish Gupta, Marcia Otting, Don Dorsey

Motorola, Inc.

Networks Business (MDB)

 

ABSTRACT

Speed based advanced random registration as discussed in this paper means that when the UE’s speed crosses a “speed threshold” (which may be a fixed threshold for all of the UEs or a threshold which is randomly chosen by each UE), the UE will attempt to perform a registration after a random delay time (within a certain maximum limit of course , e.g. 30 seconds).  It will attempt to perform this registration even though there is no change in the registration area. This may enable NW to give a list of registration areas in advance where UE may be heading to.

 

Note:

Speed and direction of the UE can be determined in many ways e.g. using GPS or any other sophisticated device, or methods mentioned in 3GPP (For example the UE could decide to perform the speed based registration if it becomes “fast moving” according to the 3GPP definition of  “fast moving, i.e. at least Ncr reselections in Tcrmax seconds.   And it could send the last few cells that it has been on in order so that the network could determine its general direction of motion– rather than directly sending its direction of motion.  With this solution, the UE would not necessarily need to have GPS capabilities in order to implement the speed based registration.), or any other method.

PROBLEM

 In the organized high mobility environment where many users are traveling in same direction and speed and at same location (say in a high speed bus or train), all the users may be crossing a registration  area at same time, causing all the UEs to perform registration procedure at same time. This may congest NW especially on RACH and hence may cause call establishment failures or may cause registration procedure delay causing UE to be in out of service during this delay period.

The problem is even more severe in the high population density areas because in order to not exceed the  paging capacity of the cell, the location area size will be smaller.   (So for a high speed UE, there is a greater chance of crossing a location area boundary.)

.

SOLUTION

 Solution to above problem lies in a method where UE does not have to perform registration as soon as it crosses registration area. Instead it is allowed to perform registration after a random amount of delay and provide any service to user during any point of time till then. This can happen if UE somehow already registered to the new registration area it is entering to.

One such method as mentioned in this paper is to perform speed based advanced random registration which allows UE to obtain in advance a list of registration areas UE is heading to.

OPERATION

Following algorithm and corresponding scenario is suggested to better understand speed based advanced random registration –

1. 50 passengers are there in the moving bus, and each one has a phone cam...