Methods to support continuous MBMS reception without network assistance
First Claim
1. A method comprising:
- receiving a subscribed multimedia broadcast multicast service (MBMS) service by a user equipment (UE) in a source cell;
performing handover to a target cell;
obtaining MBMS information of the target cell, wherein the MBMS information comprises an MBMS single frequency network (MBSFN) area ID of the target cell; and
determining MBMS service continuity in the target cell, wherein the UE releases MBMS bearer and informs a non-access stratum (NAS) entity if the subscribed MBMS service is discontinued after handover, and wherein the UE keeps MBMS bearer during handover if the subscribed MBMS service is available after handover.
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Accused Products
Abstract
In an LTE/LTE-A system, a UE subscribes to an MBMS service in a source cell. In one embodiment, the UE with ongoing MBMS service handovers to a target cell. The UE obtains MBMS information of the target cell before or after the handover. The UE then determines MBMS service continuity in the target cell based on the obtained MBMS information. In another embodiment, the UE with ongoing MBMS service reselects a new cell. The UE makes cell reselection decision based on obtained MBMS information of its neighbor cells. If the subscribed MBMS service is discontinued after handover or cell reselection, the UE releases MBMS bearer and informs a NAS entity. If the subscribed MBMS service is available after handover or cell reselection, the UE keeps MBMS bearer during handover or cell reselection. By acquiring MBMS information, the UE is able to maintain continuous MBMS reception after handover or cell reselection.
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Citations
25 Claims
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1. A method comprising:
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receiving a subscribed multimedia broadcast multicast service (MBMS) service by a user equipment (UE) in a source cell; performing handover to a target cell; obtaining MBMS information of the target cell, wherein the MBMS information comprises an MBMS single frequency network (MBSFN) area ID of the target cell; and determining MBMS service continuity in the target cell, wherein the UE releases MBMS bearer and informs a non-access stratum (NAS) entity if the subscribed MBMS service is discontinued after handover, and wherein the UE keeps MBMS bearer during handover if the subscribed MBMS service is available after handover. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A user equipment (UE), comprising:
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a radio frequency (RF) module that receives a subscribed multimedia broadcast multicast service (MBMS) service from a multimedia broadcast service center (MBSC); a handover (HO) module that performs handover from a source cell to a target cell; and an MBMS module that obtains MBMS information of the target cell, wherein the MBMS information comprises an MBMS single frequency network (MBSFN) area ID, wherein the UE releases MBMS bearer and informs a non-access stratum (NAS) entity if the subscribed MBMS service is discontinued after handover, and wherein the UE keeps MBMS bearer during handover if the subscribed MBMS service is available after handover. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method comprising:
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receiving a subscribed multimedia broadcast multicast service (MBMS) service by a user equipment (UE) in a first cell; obtaining MBMS information of neighbor cells, wherein the MBMS information comprises an MBMS single frequency network (MBSFN) area ID, MBMS configuration information, and an MBMS service list; and determining a second cell from the neighbor cells for cell reselection based on the obtained MBMS information, wherein the UE releases MBMS bearer and informs a non-access stratum (NAS) entity if the UE discontinues the subscribed MBMS service, and wherein the UE keeps MBMS bearer during cell reselection if the subscribed MBMS service is available after cell reselection. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A user equipment (UE), comprising:
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a radio frequency (RF) module that receives a subscribed multimedia broadcast multicast service (MBMS) service in a first cell from a multimedia broadcast service center (MBSC); and an MBMS module that obtains MBMS information of neighbor cells and thereby determining a second cell from the neighbor cells for cell reselection, wherein the MBMS information comprises an MBMS single frequency network (MBSFN) area ID, MBMS configuration information, and an MBMS service list, wherein the UE releases MBMS bearer and informs a non-access stratum (NAS) entity if the UE discontinues the subscribed MBMS service, and wherein the UE keeps MBMS bearer during cell reselection if the subscribed MBMS service is available after cell reselection. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification