MEASUREMENT APPARATUS AND METHOD FOR THE COMMUNICATION OF AN IDLE MODE DEVICE HAVING LOW MOBILITY IN A MOBILE COMMUNICATION SYSTEM

• US 20120322440A1
• Filed: 01/13/2011
• Published: 12/20/2012
• Est. Priority Date: 01/15/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeong, Kyeong In, Kim, Soeng Hun, Jung, Jung Soo, Kim, Sang Bum
• Granted Patent: US 10,313,959 B2
• Time in Patent Office: Days
• US Class Current: 455/425
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention defines an efficient measurement method for idle mode M2M/MTC device with low/no mobility in a mobile communication system. An example of the mobile communication system to which the present invention is application is 3GPP UMTS mobile communication system and 3GPP LTE/LTE-A mobile communication system as the next generation mobile communication system under discussion in 3GPP.

Claims

1. A method for a base station to control measurements of communication devices in a mobile communication system, comprising:

collecting information on the communication devices with low mobility;

configuring system information including a reference threshold value and an additional threshold value lower than the reference threshold for optimizing idle mode measurements of the communication devices through analysis of the collected information; and

broadcasting the system information for the communication devices within a cell,

wherein the additional threshold value is the threshold value for performing the measurement in a limited number of cells in which the mobility of the mobile devices is predicted.

2. The method of claim 1, wherein configuring system information comprising:

analyzing the collected information to acquire a number of communication devices, the collected information including information on locations and number of the communication devices;

configuring, when the number of communication devices is large, the system information with the reference threshold value and the additional threshold value; and

configuring, when the number of communication device is small, the system information with the reference threshold value.

3. The method of claim 2, wherein collecting information on the communication devices comprises receiving the information on the communication devices with low mobility from an O&

M server or MME, and the communication devices are the communication devices between electronic devices or between an electronic device and a server.

4. A measurement method of a M2M/MTC device with low mobility in a mobile communication system, comprising:

receiving system information including a reference threshold value and an additional threshold value from a base station;

generating a measurement value by measuring strength of a radio channel of a serving cell;

performing, when the measurement value is less than the reference threshold value and greater than the additional threshold value, the measurement to a small number of cells limited in mobility; and

performing, when the measurement value is less than the additional threshold value, the measurement to entire cells.

5. The measurement method of claim 4, wherein performing the measurement comprises executing, when the measurement value is greater than the reference threshold value, measurement only to the serving cell.

6. The measurement method of claim 5, wherein the reference threshold value and additional threshold value are the reference threshold values for intra-frequency or inter-frequency or inter-system measurement, and performing the measurement comprises:

executing, when the reference threshold value and additional reference threshold value are the intra-frequency threshold values, the intra-frequency measurement;

executing, when the reference threshold value and additional reference threshold value are the inter-frequency threshold values, the inter-frequency measurement; and

executing, when the reference threshold value and additional reference threshold value are the inter-system threshold values, the inter-system measurement.

7. The measurement method of claim 6, wherein the measurement value is one of a received signal power of a reference channel of the serving cell and a received signal quality of the reference channel of the serving cell to entire measured interference.

8. A measurement method of an M2M/MTC device in the mobile communication system, comprising:

checking a data communication-allowed period and whether a current time is before a start of a data communication-allowed period as much as a predetermined threshold time value;

performing intra-frequency/inter-frequency/inter-system idle mode measurement only when the M2M/MTC device is in idle mode for the data communication-allowed period and the period before the start of a data communication-allowed period as much as a predetermined threshold time value; and

skipping, when the current time is not the data communication-allowed period or the period before the start of a data communication-allowed period as much as a predetermined threshold time value, the intra-frequency/inter-frequency/inter-system measurement.

9. A measurement apparatus of a base station for M2M/MTC device communication in a mobile communication system, comprising:

a radio resource manager which manages resource of a set of a limited number of cells in which mobility of idle mode M2M/MTC devices with low mobility;

a message generator which generates system information including basic measurement information and additional measurement information for triggering intra-frequency/inter-frequency/inter-system measurement for the idle mode M2M/MTC devices with low mobility; and

a radio transceiver which broadcast the system information including the basic measurement information and additional measurement information.

10. A measurement method of a terminal for M2M/MTC device communication in a mobile communication system, comprising:

a radio transceiver which receives system information including additional measurement information broadcast; and

a measurement unit which compares a measurement value of a current serving cell with the additional measurement information and performs, when the measurement value Sx of the current serving cell is less than the additional measurement threshold value, intra-frequency/inter-frequency/inter-system measurement to a limited number of cells in which mobility of the M2M/MTC device is predicted.