6.4.1.6 Exchange Identification (XID) command/response LLC参数协商中,LLC层参数N201-I,mD,mU,kD,kU在44.064协议的table 6中都是向下协商的,就是表示协商值要小于原来的参数,但是后面又说,In ABM, N201-I,mD,mU,kD,kU can only be negotiated to the same or higher values as previously used. 那在ABM模式下,到底是向下协商还是向上协商呢,这里不是矛盾的吗? 求助艾版主。
N201‑I (maximum information field length for I frames) | 6 | 2 | 00000bbb
bbbbbbbb | 140 through 1 520 | octets | down | mD (I frame buffer size in the downlink direction) | 7 | 2 | 0bbbbbbb
bbbbbbbb | 0, 9 through 24 320 | 16 octets | down | mU (I frame buffer size in the uplink direction) | 8 | 2 | 0bbbbbbb
bbbbbbbb | 0, 9 through 24 320 | 16 octets | down | kD (window size in the downlink direction) | 9 | 1 | bbbbbbbb | 1 through 255 | frames | down |
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