Method and network system for multicast service transmission

Abstract

The invention discloses a transmission method of multicast service, the method including: a master entity receiving multicast MBMS service data; the master entity processing the service data through a radio link control RLC layer and a media access control MAC layer, and transmitting the data block and interface transmitting time mark obtained through the MAC layer processing to auxiliary equipment of the master entity; and adding the interface transmitting time mark on the data block in the processing process so as to form a data package being transmitted to a slave entity; the slave entity transmitting the interface transmitting time mark and the data block obtained through the MAC layer processing to the auxiliary equipment of the slave entity; the auxiliary equipment of the master entity and the auxiliary equipment of the slave entity transmitting the data block through the MAC layer processing when the interface transmitting time is arrived. The application of the technical proposal provided by the invention can realize synchronous transmission of MBMS service.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and network system for multicast multicast service transmission. Background technique [0002] Multicast multicast service (Multimedia Broadcast Multicast Service, MBMS) is one of the important contents of 3GPP service development. MBMS refers to sending the same multimedia service data to multiple receivers in the network at the same time on the network side. For MBMS services based on High Speed ​​Packet Access (HSPA+) architecture, the network side needs to transmit the same MBMS data in multiple cells at the same time, and use the same coding method to send them strictly synchronously, so that the user equipment ( User Equipment (UE) can treat signals from different cells as different multipath components of a signal, and combine them through a multipath diversity (RAKE) receiver, so as to combine service data from multiple cells at the physical layer to achie...

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Problems solved by technology

[0005] 1. Since the physical configurations of the packet data concentration protocol (Packet Data Convergence Protocol, PDCP) layer, radio link control (Radio Link Control, RLC) layer, and media access control (Medium Access Control, MAC) layer are all on each RNC, There is a module responsible for header compression processing on the PDCP layer. If an RNC loses a packet, it will affect the value of the PDCP state variable on the RNC, and will affect the header compression process and results of the next or more packets, resulting in The content of the data sent by this RNC and other RNCs at the physical layer is inconsistent

[0006] 2. In the prior art, some data packets sent by the SGSN to the RNC are added with an air interface transmission time mark, and some data packets are not added with an air interface transmission time mark, so that the transmission of MBMS services cannot be synchronized in time

For example, the first data packet is added with the air interface transmission time stamp, the 2nd-10th data packets are not added with the air interface transmission time stamp, and the 11th data packet is added with the air interface transmission time stamp. After the 1st data packet and before the 11th data packet, the 2nd-10th data packet can be sent arbitrarily, and the 2nd-10th data packet cannot be sent at the same time as other RNCs, and the transmission of MBMS services cannot be synchronized in time

[0007] 3. Since the business session management control process also adopts distributed processing, only static configuration can be used for the use of resources at present. Therefore, the resources of the physical layer, RLC layer, MAC layer, and PDCP layer used by the RNC are statically configured. For The physical layer resources configured for the RNC, no matter whether the RNC needs to use them, the physical layer resources are always occupied, and the physical layer resources cannot be adjusted in time according to the system operation status, which will reduce the resource usage efficiency

For a system with frequent business changes or a large number of business types, the workload of resource allocation is very heavy and error-prone

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