Method and network element for intelligently adapting video packets
A network unit, video technology, applied in the field of communication
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example 1
[0058] Example 1: Adaptation preparation
[0059] In this example, the base station identifies bearers carrying scalable video services. Figure 7 The steps are shown.
[0060] Step 1: The CP establishes a new bearer.
[0061] Step 2: The CP instructs the RPI to detect the service type of the new bearer, and the CP uses the bearer ID to indicate the bearer to the RPI.
[0062] Step 3: The RPI finds the packet received from the CN in the indicated bearer, and the RPI identifies the service type by detecting the packet.
[0063] Step 4: In this embodiment, since the RPI has read the dependency_id, quality_id and temporal_id in the RTP payload header of the packet, the RPI returns the detection result {SVC} to the CP.
[0064] Step 5: The CP stores the detection results for future use.
example 2
[0065] Example 2: Adaptation operation
[0066] In this example, one SVC bitstream is transmitted to unicast UEs. The SVC bitstream consists of only one IP packet stream, which includes a base layer and enhancement layers. Figure 8 The steps are shown in .
[0067] Step 1: The RRM monitors the trigger conditions of the changing radio environment.
[0068] Step 2: RRM detects a drop in the radio environment due to a sudden decrease in CQI and an accompanying sudden increase in PDCP layer buffers. In order to avoid the impending "blind packet discard" in the PDCP layer buffer, in this example, RRM decides to perform "soft adaptation" according to the degree of CQI decrease and PDCP layer buffer increase.
[0069] Step 3: The RRM instructs the SPP to enter the "on" state from the initial "off" state.
[0070]Step 4: Apply RPI to obtain scalability information of the SVC bitstream. In this example, the SVC bitstream consists of a base layer (packets with dependency_id=0, q...
example 3
[0076] Example 3: Adaptation operation
[0077] In this example, one MVC bitstream is delivered to unicast UEs. An MVC bitstream includes only one IP packet stream, which includes a base view and multiple non-base views. Figure 11 The steps are shown in .
[0078] Step 1: The RRM monitors the trigger conditions of the changing radio environment.
[0079] Step 2: RRM detects that available radio resources are greatly reduced. In order to enable late arriving UEs to access the system, the RRM decides to reduce the allocated resources of the MVC service. In this example, the RRM decides to perform "hard adaptation" based on the extent to which available radio resources are reduced.
[0080] Step 3: The RRM instructs the SPP to enter the "on" state from the initial "off" state.
[0081] Step 4: Apply RPI to obtain scalability information of the MVC bitstream. In this example, the MVC bitstream includes one base view (packet with view_id=0), two non-base views (packets wit...
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