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Method and system for providing multicast bear

A technology of multicast stream and multicast data, which is applied in the direction of radio/inductive link selection arrangement, selection device, network connection, etc., which can solve the problems of unable to stop, unable to start encryption, and unreliable transmission of uplink unicast data, etc.

Active Publication Date: 2007-10-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because, under normal circumstances, during unicast transmission, unicast data is generally encrypted on the air interface, each UE has its own specific encryption key, and the encryption process in the existing protocol cannot be stopped once a connection process is started
However, the downlink multicast data needs to be sent to multiple UEs, so it cannot be encrypted on the air interface, and the UE that needs to realize the multicast service cannot start the encryption function when the connection is established
[0018] To sum up, in the prior art solution, the implementation of multicast bearing in the existing channel mapping structure for bearing unicast has the following disadvantages, which are summarized as follows: when implementing multicast bearing, the downlink logical channel is only used for Transmission of downlink multicast data, so the transmission channel of downlink unicast data is interrupted during the transmission of multicast data; when implementing multicast bearer, the unacknowledged mode of RLC is used, so the uplink unicast data cannot be transmitted reliably; When the multicast bearer is used, since the downlink multicast data is not encrypted on the air interface, the UE that wants to start the multicast service cannot start the encryption function when the connection is established

Method used

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  • Method and system for providing multicast bear
  • Method and system for providing multicast bear
  • Method and system for providing multicast bear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1: A multicast bearer solution using a dedicated logical channel whose logical channel ID is 15

[0062] Figure 5 is a schematic diagram of the channel mapping relationship in the receiving stage of the multicast streaming media service using the dedicated logical channel whose logical channel identifier is 15. As shown in Figure 5, the channel mapping relationship includes the receiving stage of the unicast streaming media service shown in Figure 3 In addition to the channel mapping structure, it further includes: a logical channel with a logical channel ID of 15 for transmitting multicast data, an RLC entity that provides multicast radio bearer, and a multicast channel that carries the logical channel.

[0063] In order to realize the multicast streaming media service, on the basis of the existing unicast bearer system, a multicast channel is added between the network side and the UE side, and the added multicast channel is used to bear the logical channel f...

Embodiment 2

[0080] Embodiment 2: Multicast bearer solution using MTCH

[0081] Fig. 6 is a schematic diagram of the channel mapping relationship in the receiving stage of the multicast streaming media service using MTCH. It includes: MTCH for transmitting multicast data, an RLC entity providing multicast radio bearer, and a common channel carrying logical channels, and the common channel may be FACH.

[0082] The logical channel used to carry multicast data adopts MTCH. When MTCH is carried on the downlink common channel, the value of the TCTF field contained in the data block header is 0110, indicating that the service currently carried is MBMS service, and the MBMS- Id is 4 bits, its value is 0 to 14, 15 is reserved, the value of MBMS-Id can be configured arbitrarily, and is used to distinguish multiple MTCHs mapped to the same downlink common channel.

[0083] The channel structure of MTCH is shown in Table 2.

[0084]

[0085] Table 2

[0086] The...

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Abstract

This invention discloses a method for providing multicast loading, which sets up a logic channel between network side and a UE side for tranasmitting multicast data and sets default multicast wireless loading parameter on the two sides, when the UE asks for multicast stream media service, the network side sends RRC state conversion instruction with RAB identification to the UE asking for stream media service, after the UE side receives the instruction, it turns its state to a public channel state and sets up the loading based on the default wireless loading parameter, the network side loads the multicast data on the set-up logic channel and maps them on the public channel to be transmitted to the UE side, which receives the multicast data loaded on the logic channel from the public channel. This invention also discloses a system for providing multicast loading.

Description

technical field [0001] The present invention relates to multicast technology, in particular to a method and system for providing multicast bearer. Background technique [0002] The radio link control (RLC) protocol implements data transmission modes on the air interface into three working modes: transparent mode (TM), unacknowledged mode (UM) and acknowledged mode (AM). In transparent mode and unacknowledged mode, there is a sending entity and a receiving entity, and in acknowledged mode there is only one entity combining sending and receiving. In the transparent mode, the RLC sending entity does not perform any processing on the upper layer data, and directly transmits it to the RLC receiving entity through a logical channel. In the non-confirmation mode, the RLC sending entity receives the upper layer data, segments and concatenates the data into several data blocks, adds a continuous sequence number to each data block, and transmits it to the RLC receiving entity through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/22
CPCH04L12/66
Inventor 胡军
Owner HUAWEI TECH CO LTD
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