# US 10,484,193 B2 · EMBMS session suspend/stop notification

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- Number: US 10,484,193 B2
- Document ID: US10484193B2
- Status: Granted
- Kind: B2
- Application number: 15/516,376
- Filed: 2015-11-02
- Published: 2017-10-19
- Granted: 2019-11-19
- Earliest claimed: 2014-11-06
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Jun Wang; Xipeng Zhu; Xiaoxia Zhang; Kuo-Chun Lee
- Web page: https://patentgrep.com/patent/US10484193B2

## CPC

- H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)}
- 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 72/30: Resource management for broadcast services
- H04W 76/20: Manipulation of established connections
- H04W 76/32: Release of transport tunnels
- H04W 76/36: for reassigning the resources associated with the released connections
- H04W 76/40: for selective distribution or broadcast
- H04W 76/12: Setup of transport tunnels
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives a service through an MBMS session. The apparatus receives a first notification of an upcoming suspension of the MBMS session. The apparatus requests establishment of a unicast bearer prior to the upcoming suspension of the MBMS session upon receiving the first notification. The apparatus receives a corresponding unicast version of the service of the MBMS session via unicast when the unicast bearer is established. In an aspect, the first notification may be received during a first MCCH modification period, the corresponding unicast version of the service is received via unicast during a second MCCH modification period. In an aspect, the apparatus may further receive a second notification that the MBMS session is suspended during the second MCCH modification period.

## Claims

### Claim 1

A method for wireless communication by a user equipment (UE), comprising:
receiving a service through a multimedia broadcast multicast service (MBMS) session;
receiving a first notification of an upcoming suspension of the MBMS session;
requesting establishment of a unicast bearer prior to the upcoming suspension of the MBMS session upon receiving the first notification;
determining the MBMS session to be suspended based on a logical channel identifier (LCID) of a set of LCID received in a multicast channel scheduling information (MSI) of the first notification, wherein the LCID of the set of LCIDs is associated with a corresponding multicast traffic channel (MTCH) that corresponds to the MBMS session to be suspended, wherein the first notification in the MSI includes the LCID associated with the corresponding MTCH and a suspension indicator associated with the LCID that is associated with the corresponding MTCH, wherein the suspension indicator indicates an expected time of the upcoming suspension, the expected time being based on one or a multiple of a multicast channel scheduling period (MSP); and
establishing a unicast bearer; and
receiving a corresponding unicast version of the service of the MBMS session via unicast when the unicast bearer is established.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first notification is received during a first multicast control channel (MCCH) modification period, the corresponding unicast version of the service is received via unicast during a second MCCH modification period, and the method further comprises receiving a second notification that the MBMS session is suspended during the second MCCH modification period.

### Claim 3 (depends on 2)

The method of claim 2, further comprising:
receiving a third notification about a change in MCCH information during an initial MCCH modification period prior to the first MCCH modification period during which the first notification is received.

### Claim 4 (depends on 2)

The method of claim 2, wherein the first notification is MCCH information.

### Claim 5 (depends on 4)

The method of claim 4, wherein the MCCH information is associated with a Multicast Broadcast Single Frequency Network (MBSFN) area configuration message.

### Claim 6 (depends on 1)

The method of claim 1, wherein the receiving the first notification further comprises:
determining that the LCID associated with the corresponding MTCH is a repeated LCID of one of the set of LCIDs; and
determining an expected time of the upcoming suspension based on a reserved value that is included in the MSI and is associated with the repeated LCID,
wherein the establishment of the unicast bearer is requested prior to the expected time of the upcoming suspension.

### Claim 7 (depends on 6)

The method of claim 6, wherein the reserved value associated with the repeated LCID is included in a Stop MTCH field associated with the repeated LCID in the MSI.

### Claim 8 (depends on 6)

The method of claim 6, wherein the reserved value indicates the expected time of the upcoming suspension, the expected time being based on a multiple of a multicast channel scheduling period (MSP), and
wherein the expected time is later than time it takes to establish the unicast bearer.

### Claim 9 (depends on 1)

The method of claim 1,
wherein the LCID of the set of LCIDs is associated with a temporary mobile group identity (TMGI) that identifies the service of the MBMS session for the upcoming suspension.

### Claim 10 (depends on 9)

The method of claim 9,
wherein the expected time is later than time it takes to establish the unicast bearer.

### Claim 11 (depends on 1)

The method of claim 1, wherein the first notification is included in a media access control (MAC) control element.

### Claim 12 (depends on 11)

The method of claim 11, wherein the MAC control element includes a logical channel identifier (LCID) and a suspension indicator associated with the LCID, and
wherein the suspension indicator associated with the LCID indicates that the MBMS session associated with the LCID will be suspended.

### Claim 13

An apparatus for wireless communication, comprising:
means for receiving a service through a multimedia broadcast multicast service (MBMS) session;
means for receiving a first notification of an upcoming suspension of the MBMS session;
means for requesting establishment of a unicast bearer prior to the upcoming suspension of the MBMS session upon receiving the first notification;
means for determining the MBMS session to be suspended based on a logical channel identifier (LCID) of a set of LCID received in a multicast channel scheduling information (MSI) of the first notification, wherein the LCID of the set of LCIDs is associated with a corresponding multicast traffic channel (MTCH) that corresponds to the MBMS session to be suspended, wherein the first notification in the MSI includes the LCID associated with the corresponding MTCH and a suspension indicator associated with the LCID that is associated with the corresponding MTCH, wherein the suspension indicator indicates an expected time of the upcoming suspension, the expected time being based on one or a multiple of a multicast channel scheduling period (MSP);
means for establishing a unicast bearer; and
means for receiving a corresponding unicast version of the service of the MBMS session via unicast when the unicast bearer is established.

### Claim 14 (depends on 13)

The apparatus of claim 13, wherein the first notification is received during a first multicast control channel (MCCH) modification period, the corresponding unicast version of the service is received via unicast during a second MCCH modification period, and the apparatus further comprises means for receiving a notification that the MBMS session is suspended during the second MCCH modification period.

### Claim 15 (depends on 14)

The apparatus of claim 14, further comprising:
means for receiving a third notification about a change in MCCH information during an initial MCCH modification period prior to the first MCCH modification period during which the first notification is received.

### Claim 16 (depends on 14)

The apparatus of claim 14, wherein the first notification is MCCH information.

### Claim 17 (depends on 16)

The apparatus of claim 16, wherein the MCCH information is associated with a Multicast Broadcast Single Frequency Network (MBSFN) area configuration message.

### Claim 18 (depends on 13)

The apparatus of claim 13, wherein the means for receiving the first notification is further configured to:
determine that the LCID associated with the corresponding MTCH is a repeated LCID of one of the set of LCIDs; and
determine an expected time of the upcoming suspension based on a reserved value that is included in the MSI and is associated with the repeated LCID,
wherein the establishment of the unicast bearer is requested prior to the expected time of the upcoming suspension.

### Claim 19 (depends on 18)

The apparatus of claim 18, wherein the reserved value associated with the repeated LCID is included in a Stop MTCH field associated with the repeated LCID in the MSI.

### Claim 20 (depends on 18)

The apparatus of claim 18, wherein the reserved value indicates the expected time of the upcoming suspension, the expected time being based on a multiple of a multicast channel scheduling period (MSP), and
wherein the expected time is later than time it takes to establish the unicast bearer.

### Claim 21 (depends on 13)

The apparatus of claim 13,
wherein the LCID of the set of LCIDs is associated with a temporary mobile group identity (TMGI) that identifies the service of the MBMS session for the upcoming suspension.

### Claim 22 (depends on 21)

The apparatus of claim 21,
wherein the expected time is later than time it takes to establish the unicast bearer.

### Claim 23 (depends on 13)

The apparatus of claim 13, wherein the first notification is included in a media access control (MAC) control element.

### Claim 24 (depends on 23)

The apparatus of claim 23, wherein the MAC control element includes a logical channel identifier (LCID) and a suspension indicator associated with the LCID, and
wherein the suspension indicator associated with the LCID indicates that the MBMS session associated with the LCID will be suspended.

### Claim 25

An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive a service through a multimedia broadcast multicast service (MBMS) session;
receive a first notification of an upcoming suspension of the MBMS session;
request establishment of a unicast bearer prior to the upcoming suspension of the MBMS session upon receiving the first notification;
determine the MBMS session to be suspended based on a logical channel identifier (LCID) of a set of LCID received in a multicast channel scheduling information (MSI) of the first notification, wherein the LCID of the set of LCIDs is associated with a corresponding multicast traffic channel (MTCH) that corresponds to the MBMS session to be suspended, wherein the first notification in the MSI includes the LCID associated with the corresponding MTCH and a suspension indicator associated with the LCID that is associated with the corresponding MTCH, wherein the suspension indicator indicates an expected time of the upcoming suspension, the expected time being based on one or a multiple of a multicast channel scheduling period (MSP);
establish a unicast bearer; and
receive a corresponding unicast version of the service of the MBMS session via unicast when the unicast bearer is established.

### Claim 26 (depends on 25)

The apparatus of claim 25, wherein the first notification is received during a first multicast control channel (MCCH) modification period, the corresponding unicast version of the service is received via unicast during a second MCCH modification period, and the at least one processor is further configured to receive a second notification that the MBMS session is suspended during the second MCCH modification period.

### Claim 27 (depends on 26)

The apparatus of claim 26, wherein the at least one processor is further configured to:
receive a third notification about a change in MCCH information during an initial MCCH modification period prior to the first MCCH modification period during which the first notification is received.

### Claim 28 (depends on 26)

The apparatus of claim 26, wherein the first notification is MCCH information.

### Claim 29 (depends on 28)

The apparatus of claim 28, wherein the MCCH information is associated with a Multicast Broadcast Single Frequency Network (MBSFN) area configuration message.

### Claim 30 (depends on 25)

The apparatus of claim 25, wherein the at least one processor configured to receive the first notification is further configured to:
determine that the LCID associated with the corresponding MTCH is a repeated LCID of one of the set of LCIDs; and
determine an expected time of the upcoming suspension based on a reserved value that is included in the MSI and is associated with the repeated LCID,
wherein the establishment of the unicast bearer is requested prior to the expected time of the upcoming suspension.

### Claim 31 (depends on 30)

The apparatus of claim 30, wherein the reserved value associated with the repeated LCID is included in a Stop MTCH field associated with the repeated LCID in the MSI.

### Claim 32 (depends on 30)

The apparatus of claim 30, wherein the reserved value indicates the expected time of the upcoming suspension, the expected time being based on a multiple of a multicast channel scheduling period (MSP), and
wherein the expected time is later than time it takes to establish the unicast bearer.

### Claim 33 (depends on 25)

The apparatus of claim 25,
wherein the LCID of the set of LCIDs is associated with a temporary mobile group identity (TMGI) that identifies the service of the MBMS session for the upcoming suspension.

### Claim 34 (depends on 33)

The apparatus of claim 33,
wherein the expected time is later than time it takes to establish the unicast bearer.

### Claim 35 (depends on 25)

The apparatus of claim 25, wherein the first notification is included in an media access control (MAC) control element.

### Claim 36 (depends on 35)

The apparatus of claim 35, wherein the MAC control element includes a logical channel identifier (LCID) and a suspension indicator associated with the LCID, and
wherein the suspension indicator associated with the LCID indicates that the MBMS session associated with the LCID will be suspended.

### Claim 37

A non-transitory computer-readable medium storing computer executable code for wireless communication, comprising code for:
receiving a service through a multimedia broadcast multicast service (MBMS) session;
receiving a first notification of an upcoming suspension of the MBMS session;
requesting establishment of a unicast bearer prior to the upcoming suspension of the MBMS session upon receiving the first notification;
determining the MBMS session to be suspended based on a logical channel identifier (LCID) of a set of LCID received in a multicast channel scheduling information (MSI) of the first notification, wherein the LCID of the set of LCIDs is associated with a corresponding multicast traffic channel (MTCH) that corresponds to the MBMS session to be suspended, wherein the first notification in the MSI includes the LCID associated with the corresponding MTCH and a suspension indicator associated with the LCID that is associated with the corresponding MTCH, wherein the suspension indicator indicates an expected time of the upcoming suspension, the expected time being based on one or a multiple of a multicast channel scheduling period (MSP);
establishing a unicast bearer; and
receiving a corresponding unicast version of the service of the MBMS session via unicast when the unicast bearer is established.