Method for accelerating the activation of a MBMS service

Inactive Publication Date: 2011-01-20
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem in the reception of MBMS service when header compression techniques are used for the MBMS data is generated by the delay introduced by header compression when a user of a MBMS reception device activates a service.
As a matter of fact, when a user initiates reception of an MBMS transmission on its MBMS reception device, e.g. a TV channel, there is some delay before the service becomes available to the user, e.g. before the service is displayed on the screen, due to initial buffering in the codec layers.
In addition, because of the header compression applied to the headers of the MBMS data packets (e.g. RTP / IP headers), there is an additional delay until the headers can be successfully decompressed and the MBMS data can be provided to the codec layers.
While it is possible for the header compression entity to increase the frequency of transmission, this decreases the gain of header compression.

Method used

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  • Method for accelerating the activation of a MBMS service
  • Method for accelerating the activation of a MBMS service
  • Method for accelerating the activation of a MBMS service

Examples

Experimental program
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Embodiment Construction

[0054]FIG. 1 illustrates the fully sequential operation of a User Equipment device (or the operation of an User Equipment device upon startup) for receiving a MBMS video program without header compression.

[0055]At step 2, the UE selects the broadcasting channel of said MBMS video program. At step 4, the UE acquires the configuration for receiving said MBMS video program. Step 6 The UE device configures the reception module for receiving said video program. At step 8, the video program is received and buffered, and displayed to step 10.

[0056]The delay between the first step 2 and the last step 10 is illustrated by FIG. 2.

[0057]Steps 2 and 4 respectively use ½ modification period and the delay for receiving control information transmitted as the start of each reference periods (called “Modification Periods”) of a MCCH channel (for MBMS MODIFIED channel) indicating when the information related to a MBMS is changed compared with the previous reference period.

[0058]The duration of step 6...

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Abstract

The invention relates to a method for accelerating the activation of a MBMS service distributed by a service provider to a plurality of user equipments UEs in the form of MBMS data packets, MBMS data packet, comprising each, compressed header information and a payload, characterized by:—creating a specific MBMS service data flow containing only header information,—transmitting said specific MBMS service data flow to the UE separately from said MBMS data packets.

Description

TECHNICAL DOMAIN[0001]The invention pertains to telecommunication field and concerns a method for accelerating the activation of a Multimedia Broadcast Multicast Service (MBMS) distributed by a service provider to a plurality of user equipments (UEs) in the form of MBMS data packets, comprising each, compressed header information and a payload.[0002]The invention concerns also a User Equipment adapted for receiving such MBMS services and a Server adapted for distributing such MBMS services.STATE OF PRIOR ART[0003]Multimedia Broadcast Multicast Service (MBMS) is a broadcasting service that can be offered via existing GSM and UMTS cellular networks. The infrastructure offers an option to use an uplink channel for interaction between the service and the user, which is not provided in usual broadcast networks, as for example conventional digital television which is only a one-way (unidirectional) system. MBMS uses multicast distribution in the core network instead of point-to-point link...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04H20/71
CPCH04W28/06H04W76/002H04W76/02H04W76/40H04W76/10H04L69/22
InventorLECOMPTE, DAVID
OwnerNEC CORP