数据业务端到端QoS参数映射与优化

hycl5410

想跟大家讨论一下，这个实验究竟是哪个或者哪几个参数导致了这么明显的throughput区别？

TC还是ARP?

以前对ARP理解不深，觉得只有当业务忙时ARP才会起作用，现在看好像ARP很关键的样子。。。

hycl5410

TS 23.107

6.3        UMTS QoS Classes
When defining the UMTS QoS classes, also referred to as traffic classes, the restrictions and limitations of the air interface have to be taken into account. It is not reasonable to define complex mechanisms as have been in fixed networks due to different error characteristics of the air interface. The QoS mechanisms provided in the cellular network have to be robust and capable of providing reasonable QoS resolution. Table 1 illustrates the QoS classes for UMTS.
There are four different QoS classes:
-        conversational class;
-        streaming class;
-        interactive class; and
-        background class.



Table 7: Rules for determining R97/98 attributes from R99 attributes


[td]  

Resulting R97/98 Attribute		Derived from R99 Attribute
Name	Value	Value	Name
Delay class	1	conversational	Traffic class
	1	streaming	Traffic class
	1	Interactive	Traffic class
		1	Traffic handling priority
	2	Interactive	Traffic class
		2	Traffic handling priority
	3	Interactive	Traffic class
		3	Traffic handling priority
	4	Background	Traffic class
Reliability class	2	<= 10-5	SDU error ratio
	3	10-5 < x <= 5*10-4	SDU error ratio
	4	> 5*10-4	SDU error ratio
		<= 2*10-4	Residual bit error ratio
	5	> 5*10-4	SDU error ratio
		> 2*10-4	Residual bit error ratio
Peak throughput class	1	< 16	Maximum bitrate [kbps]
	2	16 <= x < 32
	3	32 <= x < 64
	4	64 <= x < 128
	5	128 <= x < 256
	6	256 <= x < 512
	7	512 <= x < 1024
	8	1024 <= x < 2048
	9	>= 2048
Precedence class	1	1	Allocation/retention priority
	2	2
	3	3
Mean throughput class	Always set to 31	-
Reordering Required (Information in the SGSN  and the GGSN PDP Contexts)	yes'	yes'	Delivery order
	'no'	'no'

Table 6: Rules for determining R99 attributes fromR97/98 attributes

[td]  

Resulting R99 Attribute		Derived from R97/98 Attribute
Name	Value	Value	Name
Traffic class	Interactive	1, 2, 3	Delay class
	Background	4
Traffic handling priority	1	1	Delay class
	2	2
	3	3
SDU error ratio	10-6	2	Reliability class
	10-4	3
	10-3	4, 5
Residual bit error ratio	10-5	2, 3, 4	Reliability class
	4*10-3	5
Delivery of erroneous SDUs	'no'	2, 3, 4	Reliability class
	'yes'	5
Maximum bitrate [kbps]	8	1	Peak throughput class
	16	2
	32	3
	64	4
	128	5
	256	6
	512	7
	1024	8
	2048	9
Allocation/Retention priority	1	1	Precedence class
	2	2
	3	3
Delivery order	yes'	yes'	Reordering Required (Information in the SGSN  and the GGSN PDP Contexts)
	'no'	'no'
Maximum SDU size	1 500 octets	(Fixed value)