You definitely should enable MLS QoS. It is also prerequisite for CoPP, which you should add in your TODO list to implement.
Enabling 'mls qos' without other config is extremely bad idea in low-end cats, like 3560/3750, due to unexpected default scheduling and due to heavily reduced buffers causing more microbursting.
On 7600/6500 it's comparatively safe to enable, but of course you can crash your router with 'show run'. I would feel comfortable enough to enable it during production hours.
You should monitor 'show queueing interface X' after enabling to see that you're not dropping anything. Long term, you should design QoS policy and implement it, I recommend using as few queues as possible (and assign 100% of buffer to those few queues).
Example of possible QoS policy in WS-X6704-10GE:
interface TenGigabitEthernet4/1
wrr-queue bandwidth percent 30 40 30 0 0 0 0 ## allocate 3 queues (+implied strictpriority) share buffer 30% 40% 30% on thos three queues
wrr-queue cos-map 1 1 0 7 # map cos values to queues
wrr-queue cos-map 2 2 3
wrr-queue cos-map 3 1 4
wrr-queue cos-map 3 2 6
For advanced config, you may want to supplement that with 'wrr-queue random-detect' with RED curve per queue+threshold.
Be sure to mark your traffic correctly when it enters your network.
The short answer: 802.16 is a series of standards for mid-range metro wireless networks, mainly for backhaul or device-to-device communication. 802.11ah instead, is a standard for low-power, low frequencie ap-to-enddevice communication in home automation or intra device communication for industrial machines.
The long answer can be found by reading the standard(s) and/or the wikipedia articles for it ;)
Best Answer
A TXOP is a transmission opportunity granted by the Access Point to the Station.
It is a given period of time during which the station can send as many frame as it wishes.
A service period is related to power saving. It's the period during which the Station listen before going back to sleep. It is initiated by the Station and allow the Access Point to send traffic destined to the Station that have been buffered.
In short :
TXOP , QoS mechanism, AP initiated, traffic from Station to AP
Service Period, Power saving mechanism, Station initiated, traffic from AP to Station