关于V(S), V(A)及WS 含义

Yonghong_MM

当移动台检测到发送窗口停滞时（V(S) = V(A) + WS），移动台应启动定时器T3182，在收到PACKET UPLINK ACK/NACK导致V(S) < V(A) + WS时，则停止T3182。当T3182超时后，移动台将把计数器N3102减去PanDec，并执行该TBF的异常释放并接入重试；当移动台收到网络发送的PACKET UPLINK ACK/NACK消息允许V(S)或V(A)增加时，移动台将把计数器N3102增加PanInc，但是N3102值不能超过PanMax所定义的值；当N3102≤0时，MS将执行该TBF的异常释放，并将触发小区重选。

上述描述中，V(S) 指发送状态变量， V(A) 指应答状态变量，WS是什么意思？哪位高手有相关详细描述文档

Yonghong_MM

多谢，应该是这个意思。
关于滑窗，如GRPS采用固定的64， EGPRS采用可变长度的窗体。关于滑窗的具体含义一直不太清楚，是否有相关详细说明或那个协议中有相关描述，烦请大侠们指点一二。

Yonghong_MM

多谢爱版主和demon版主，答复总是那么及时和精准

Yonghong_MM

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在TIA/EIA-136-362找到了较为全面的答案：
Send state variable V(S)
Each RLC endpoint transmitter shall have an associated send state variable V(S). V(S) denotes the sequence 27
number of the next in-sequence RLC data block to be transmitted. V(S) can take on the value 0 through SNS - 1. 28
V(S) shall be set to the value 0 at the beginning of each TBF in which the RLC endpoint is the transmitter. The 29
value of V(S) shall be incremented by 1 after transmission of the RLC data block with BSN = V(S). In RLC 30
acknowledged mode, V(S) shall not exceed V(A) modulo SNS by more than the maximum allowed number of 31
outstanding RLC data blocks WS.
Acknowledge state variable V(A)
In RLC acknowledged mode, each RLC endpoint transmitter shall have an associated acknowledge state 2
variable V(A). V(A) contains the BSN value of the oldest RLC data block that has not been positively 3
acknowledged by its peer. V(A) can take on the values 0 through SNS - 1. V(A) shall be set to the value 0 at the 4
beginning of each TBF in which the RLC endpoint is the transmitter. The value of V(A) shall be updated from 5
the values received from its peer in the received block bitmap (RBB) of the Packet Ack/Nack message (see 6
Section 9.1.8) 7
Furthermore, [ V(S) - V(A) ] modulo SNS &pound; WS.

Window Size (WS):