# US 10,455,544 B2 · Enhanced paging procedures for machine type communications (MTC)

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- Number: US 10,455,544 B2
- Document ID: US10455544B2
- Status: Granted
- Kind: B2
- Application number: 15/009,739
- Filed: 2016-01-28
- Published: 2016-08-04
- Granted: 2019-10-22
- Earliest claimed: 2015-01-30
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Madhavan Srinivasan Vajapeyam; Hao Xu; Wanshi Chen; Peter Gaal; Masato Kitazoe; Miguel Griot
- Web page: https://patentgrep.com/patent/US10455544B2

## CPC

- H04W 68/02: Arrangements for increasing efficiency of notification or paging channel
- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC]
- H04W 68/005: {Transmission of information for alerting of incoming communication}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 68/025: {Indirect paging}
- H04W 74/0833: Random access procedures, e.g. with 4-step access
- 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

Certain aspects of the present disclosure generally relate to wireless communications, and more specifically to enhanced paging procedures for devices with limited communications resources, such as machine type communication (MTC) devices and enhanced or evolved MTC (eMTC) devices. An example method generally includes determining a set of subframes corresponding to a paging occasion for the UE to receive a paging message from a base station (BS), determining, within the set of subframes, at least one narrowband region for receiving the paging message, and monitoring for the paging message in the at least one narrowband region within the set of subframes.

## Claims

### Claim 1

A method for wireless communications by a user equipment (UE), comprising:
determining one or more subframes corresponding to a paging occasion, wherein the UE monitors for a bundled paging message from a base station (BS) starting at the one or more subframes;
attempting to decode the bundled paging message, the bundled paging message associated with a bundling size;
determining the bundling size based at least in part on successful decoding of at least one subframe of the bundled paging message;
determining at least one narrowband region, of a plurality of narrowband regions of a system bandwidth, in which the UE monitors for the bundled paging message, wherein the determination of the at least one narrowband region is based on an identification (ID) of the UE and signaling from the BS; and
monitoring for the bundled paging message based at least in part on the determined bundling size in the at least one narrowband region, starting at the one or more subframes.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the bundling size corresponds to a number times that a subframe of the bundled paging message is repeated.

### Claim 3 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is based at least in part on the determined at least one narrowband region.

### Claim 4 (depends on 1)

The method of claim 1, wherein:
the at least one narrowband region comprises a plurality of narrowband regions; and
the signaling comprises an indication of at least a first narrowband region of the at least one narrowband region.

### Claim 5 (depends on 1)

The method of claim 1, wherein
the one or more subframes and the at least one narrowband region are jointly determined.

### Claim 6 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is based at least in part on signaling from the BS.

### Claim 7 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is based at least in part on a bundling size of a bundled random access channel (RACH) transmission, successfully decoded by the BS.

### Claim 8 (depends on 1)

The method of claim 1, further comprising:
decoding a bundled broadcast transmission from the BS, wherein the bundling size for the monitoring is determined based at least in part on a number of attempts to successfully decode the bundled broadcast transmission from the BS.

### Claim 9 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is based at least in part on measurements performed by the UE.

### Claim 10 (depends on 9)

The method of claim 9, further comprising:
transmitting one or more measurement reports to the BS, wherein the bundling size is further determined based on the measurement reports.

### Claim 11 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is triggered by a radio resource control (RRC) connection attempt by the UE.

### Claim 12 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is triggered by an initial attachment or a tracking area update by the UE.

### Claim 13 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is triggered by the UE selecting or reselecting a new cell.

### Claim 14 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is triggered by an indication that the UE has not received a paging message over a period of time.

### Claim 15 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is triggered by an indication that the UE is capable of acquiring a paging message with a smaller bundling size than a bundling sized used by the BS for a previously transmitted bundled paging message.

### Claim 16 (depends on 1)

The method of claim 1, wherein the determination of the bundling size is triggered periodically by the UE.

### Claim 17 (depends on 1)

The method of claim 1, further comprising:
determining a connection mode of the UE, and wherein the determination of the bundling size is based at least in part on the connection mode.

### Claim 18 (depends on 17)

The method of claim 17, wherein the connection mode comprises a first connection mode that indicates that the UE is deployed in a non-mobility mode or a second connection mode that indicates that the UE is deployed in a mobility mode.

### Claim 19 (depends on 17)

The method of claim 17, wherein the connection mode comprises a first connection mode that indicates that the UE is deployed in a normal power preference mode or a second connection mode that indicates that the UE is deployed in a low power preference mode.

### Claim 20 (depends on 17)

The method of claim 17, further comprising:
selecting a second BS to communicate with;
performing a random access procedure if the UE is deployed in a first connection mode, and determining the bundling size based at least in part on a pre-configured or selected value if the UE is deployed in a second connection mode.

### Claim 21 (depends on 1)

The method of claim 1, wherein the determination of the at least one narrowband region is based at least in part on a default narrowband region.

### Claim 22

A method for wireless communications by a base station (BS), comprising:
determining one or more subframes corresponding to a paging occasion, wherein the BS transmits a bundled paging message to a user equipment (UE) starting at the one or more subframes;
transmitting the bundled paging message to the UE, the bundled paging message associated with a bundling size, wherein the bundling size is determined by the UE based at least in part on successful decoding of at least one subframe of the bundled paging message;
determining at least one narrowband region, of a plurality of narrowband regions of a system bandwidth, in which the BS transmits the bundled paging message to the UE, wherein the determination of the at least one narrowband region is based on an identification (ID) of the UE and signaling from the BS; and
transmitting the bundled paging message to the UE based at least in part on the bundling size in the at least one narrowband region, starting at the one or more subframes.

### Claim 23 (depends on 22)

The method of claim 22, further comprising:
wherein the bundling size corresponds to a number times that a subframe of the bundled paging message is repeated.

### Claim 24 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is based at least in part on the determined at least one narrowband region.

### Claim 25 (depends on 22)

The method of claim 22, further comprising signaling an indication of the at least one narrowband region to the UE.

### Claim 26 (depends on 25)

The method of claim 25, wherein:
the at least one narrowband region comprises a plurality of narrowband regions; and
the signaling comprises an indication of a first narrowband region of the at least one narrowband region.

### Claim 27 (depends on 22)

The method of claim 22, wherein
the one or more subframes and the at least one narrowband region are jointly determined.

### Claim 28 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is based at least in part on a bundling size of a bundled random access channel (RACH) transmission from the UE, successfully decoded by the BS.

### Claim 29 (depends on 22)

The method of claim 22, further comprising:
transmitting a bundled broadcast transmission to the UE;
receiving, from the UE, an indication of a number of attempts by the UE to successfully decode the bundled broadcast transmission; and
determining the bundling size for the paging message based at least in part on the indicated number of attempts.

### Claim 30 (depends on 22)

The method of claim 22, further comprising:
receiving one or more measurement reports from the UE; and
determining bundling size based at least in part on the one or more measurement reports.

### Claim 31 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is triggered by a radio resource control (RRC) connection attempt by the UE.

### Claim 32 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is triggered by an initial attach or tracking area update by the UE.

### Claim 33 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is triggered by the UE selecting or reselecting a new cell.

### Claim 34 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is triggered by an indication that the UE has not received a paging message over a period of time.

### Claim 35 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is triggered by an indication that the UE is capable of acquiring a paging message with a smaller bundling size than a bundling size used by the BS for a previously transmitted bundled paging message.

### Claim 36 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is triggered periodically by the UE.

### Claim 37 (depends on 22)

The method of claim 22, wherein the determination of the bundling size is based on transmitting bundled paging messages to the UE until a response from the UE is detected or until an indication is received from a network.

### Claim 38 (depends on 37)

The method of claim 37, further comprising increasing a bundling size for each successive bundled paging message.

### Claim 39 (depends on 22)

The method of claim 22, wherein the determination of the at least one narrowband region is based at least in part on a default narrowband region.

### Claim 40

An apparatus for wireless communications, comprising:
means for determining one or more subframes corresponding to a paging occasion, wherein a user equipment (UE) monitors for a bundled paging message from a base station (BS) starting at the one or more subframes;
means for attempting to decode the bundled paging message, the bundled paging message associated with a bundling size;
means for determining the bundling size based at least in part on successful decoding of the bundled paging message;
means for determining at least one narrowband region, of a plurality of narrowband regions of a system bandwidth, in which the UE monitors for the bundled paging message, wherein the determination of the at least one narrowband region is based on an identification (ID) of the UE and signaling from the BS; and
means for monitoring for the bundled paging message based at least in part on the determined bundling size in the at least one narrowband region, starting at the one or more subframes.

### Claim 41

An apparatus for wireless communications, comprising:
means for determining one or more subframes corresponding to a paging occasion, wherein a base station (BS) transmits a bundled paging message to a user equipment (UE) starting at the one or more subframes;
means for transmitting the bundled paging message to the UE, the bundled paging message associated with a bundling size, wherein the bundling size is determined by the UE based at least in part on successful decoding of at least one subframe of the bundled paging message;
means for determining at least one narrowband region, of a plurality of narrowband regions of a system bandwidth, in which the BS transmits the bundled paging message to the UE, wherein the determination of the at least one narrowband region is based on an identification (ID) of the UE and signaling from the BS; and
means for transmitting the bundled paging message to the UE based at least in part on the bundling size in the at least one narrowband region, starting at the one or more subframes.

### Claim 42

An apparatus for wireless communications, comprising:
at least one processor configured to:
determine one or more subframes corresponding to a paging occasion, wherein a user equipment (UE) monitors for a bundled paging message from a base station (BS) starting at the one or more subframes;
attempt to decode the bundled paging message, the bundled paging message associated with a bundling size;
determine the bundling size based at least in part on successful decoding of at least one subframe of the bundled paging message;
determine at least one narrowband region, of a plurality of narrowband regions of a system bandwidth, in which the UE monitors for the bundled paging message, wherein the determination of the at least one narrowband region is based on an identification (ID) of the UE and signaling from the BS; and
monitor for the bundled paging message based at least in part on the determined bundling size in the at least one narrowband region, starting at the one or more subframes; and
a memory coupled with the at least one processor.

### Claim 43

An apparatus for wireless communications, comprising:
at least one processor configured to:
determine one or more subframes corresponding to a paging occasion, wherein a base station (BS) transmits a bundled paging message to a user equipment (UE) starting at the one or more subframes;
transmit the bundled paging message to the UE, the bundled paging message associated with a bundling size, wherein the bundling size is determined by the UE based at least in part on successful decoding of at least one subframe of the bundled paging message;
determine at least one narrowband region, of a plurality of narrowband regions of a system bandwidth, in which the BS transmits the bundled paging message to the UE, wherein the determination of the at least one narrowband region is based on an identification (ID) of the UE and signaling from the BS; and
transmit the bundled paging message to the UE based at least in part on the bundling size in the at least one narrowband region, starting at the one or more subframes; and
a memory coupled with the at least one processor.

### Claim 44

A non-transitory computer readable medium having computer executable code stored thereon, comprising:
code for determining one or more subframes corresponding to a paging occasion, wherein a user equipment (UE) monitors for a bundled paging message from a base station (BS) starting at the one or more subframes;
code for attempting to decode the bundled paging message, the bundled paging message associated with a bundling size;
code for determining the bundling size based at least in part on successful decoding of at least one subframe of the bundled paging message;
code for determining at least one narrowband region, of a plurality of narrowband regions of a system bandwidth, in which the UE monitors for the bundled paging message, wherein the determination of the at least one narrowband region is based on an identification (ID) of the UE and signaling from the BS; and
code for monitoring for the bundled paging message based at least in part on the determined bundling size in the at least one narrowband region, starting at the one or more subframes.

### Claim 45

A non-transitory computer readable medium having computer executable code stored thereon, comprising:
code for determining one or more subframes corresponding to a paging occasion, wherein a base station (BS) transmits a bundled paging message to a user equipment (UE) starting at the one or more subframes;
code for transmitting the bundled paging message to the UE, the bundled paging message associated with a bundling size, wherein the bundling size is determined by the UE based at least in part on successful decoding of at least one subframe of the bundled paging message;
code for determining at least one narrowband region, of a plurality of narrowband regions of a system bandwidth, in which the BS transmits the bundled paging message to the UE, wherein the determination of the at least one narrowband region is based on an identification (ID) of the UE and signaling from the BS; and
code for transmitting the bundled paging message to the UE based at least in part on the bundling size in the at least one narrowband region, starting at the one or more subframes.