# US 2019/0174294 A1 · Method for monitoring ue reachability in wireless communication system, and device for same

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- Number: US 2019/0174294 A1
- Document ID: US20190174294A1
- Status: Published application
- Kind: A1
- Application number: 16/235,637
- Filed: 2018-12-28
- Published: 2019-06-06
- Earliest claimed: 2014-08-11
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jinsook RYU; Hyunsook Kim; Laeyoung Kim; Jaehyun Kim; Taehun Kim
- Web page: https://patentgrep.com/patent/US20190174294A1

## CPC

- H04W 8/005: {Discovery of network devices, e.g. terminals}
- H04W 60/02: by periodical registration
- H04W 8/02: Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W 8/04: Registration at HLR or HSS [Home Subscriber Server]
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 28/02: Traffic management, e.g. flow control or congestion control
- H04W 64/003: {locating network equipment}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 76/12: Setup of transport tunnels
- H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC]
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Disclosed are a method and apparatus for monitoring User Equipment (UE) reachability in a wireless communication system. More specifically, a method for monitoring UE reachability in a wireless communication system comprises receiving, by a Mobile Management Entity (MME), a message for monitoring the UE reachability including UE reachability related indication from a Home Subscriber Server (HSS); and allocating, by the MME, an Active Time to a UE, wherein the UE reachability related indication is used for setting the Active Time of the UE and wherein the UE reachability indication is used for the UE to stay reachable so that downlink data that a server wants to transmit to the UE can be transmitted to the UE.

## Claims

### Claim at position 1

1-12. (canceled)

### Claim 13

A method for monitoring User Equipment (UE) reachability in a wireless communication system, the method performed by a first network node device, the first network device including a transceiver, a processor and a memory, the method comprising:
receiving a first message from a second network node;
when a UE reachability related information is included in the first message, setting an Active Time for the UE using the UE reachability related information;
after receiving the first message, monitoring the UE when the UE will become reachable; and
based on the monitoring, transmitting a second message regarding the UE reachability to a server,
wherein the UE reachability related information is used for setting the Active Time of the UE so that the UE stays reachable to allow the server to deliver a downlink data to the UE.

### Claim 14 (depends on 13)

The method of claim 13, wherein the Active Time is allocated to a UE.

### Claim 15 (depends on 13)

The method of claim 13, wherein the UE reachability related information is used for setting the Active Time of the UE so that the UE stays reachable to allow the server to deliver a downlink data to the UE after the server receives the second message.

### Claim 16 (depends on 13)

The method of claim 13, wherein the UE reachability related information indicates that the server has downlink data to transmit to the UE.

### Claim 17 (depends on 13)

The method of claim 13, wherein the UE reachability related information is received from a Home Subscriber Server (HSS), which receives the UE reachability related information from a Service Capability Server or an Application Server which has the downlink data to transmit to the UE.

### Claim 18 (depends on 13)

The method of claim 13, wherein the Active Time is set to ‘0’.

### Claim 19 (depends on 13)

The method of claim 13, further comprising transmitting a third message to a base station to establish a user plane bearer.

### Claim 20 (depends on 13)

The method of claim 13, wherein the set Active Time is transmitted to the UE through a Tracking Area Update Accept message, Attach Accept message, or Service Request Accept message.

### Claim 21

A first network node for monitoring User Equipment (UE) reachability in a wireless communication system, the first network node comprising:
a transceiver; and
a processor for controlling the transceiver,
wherein the processor is configured to:
receive a first message from a second network node;
when a UE reachability related information is included in the first message, setting an Active Time for the UE using the UE reachability related information;
after receiving the first message, monitoring the UE when the UE will become reachable; and
based on the monitoring, transmitting a second message regarding the UE reachability to a server,
wherein the UE reachability related information is used for setting the Active Time of the UE so that the UE stays reachable to allow the server to deliver a downlink data to the UE.