Communication apparatus and communication method for low power fast smart scanning
A communication device and beacon frame technology, applied in power management, wireless communication, energy consumption reduction, etc., to achieve the effect of reducing scanning waiting time
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no. 1 example
[0064] As mentioned earlier, from a power consumption point of view, WUR-based smart scanning will have a decisive advantage due to the low power consumption of WUR radios (WURx). However, the transmission of WUR discovery frames by the AP, which is critical for WUR smart scanning, may not be very frequent, considering the low data rate of WUR transmissions. This, combined with the necessity to scan a large number of WUR channels, will make the scanning process just as long, if not longer. One way to reduce scanning latency is to limit the sending of WUR discovery frames on a subset of WUR channels. These WUR channels may be referred to as WUR discovery channels. From a scanning latency perspective, it is preferable to designate a single WUR channel as the only common WUR discovery channel for sending WUR discovery channels. However, using only a single WUR channel as a WUR discovery channel is also risky due to the inherent lack of predictability of wireless channel quality...
no. 2 example
[0076] Figure 19 An alternate frame format for WUR discovery frame 1900 is shown. WUR finds frame 1900 to follow with Figure 6 The WUR finds the same structure as frame 600, but with the following differences:
[0077] 1) The HESSID (Homogenous Extended Service Set Identifier, Homogenous Extended Service Set Identifier) field 1902 is used to indicate the wireless network represented by the AP sending the frame. The HESSID field 1902 identifies a homogeneous ESS, which is a group of BSSs that all provide access to the same external network. The value used as HESSID is the BSSID of an AP in the homogeneous ESS and is in the form of a MAC address (6 octets). HESSID is a globally unique identifier for a wireless network and can take precedence over SSID, especially in unmanaged networks where there is a risk of multiple operators using the same SSID.
[0078] 2) A neighbor AP information field 1910 is included in the frame body, and the neighbor AP information field 1910 i...
no. 3 example
[0100] In the previous embodiments, the information of the neighbor AP that sent the WUR discovery frame is carried in the WUR discovery frame itself, and this information is used during the fast smart scan to reduce the smart scan latency. However, it is also possible that instead of using the WUR discovery frame, the information of the neighbor AP that sent the WUR discovery frame can also be carried in the 802.11 information elements carried by PCR frames such as beacon frames, probe response frames, etc. Figure 25 A neighbor WUR AP information element 2500 is shown, which may be used to carry one or more neighbor WUR AP information fields 2510, one for each WUR discovery channel. Each Neighbor WUR AP Information field 2510 is variable in length and includes a WUR Operation Class field 2512 , a WUR Discovery Channel Number field 2514 , a Neighbor WUR AP Count field 2516 , and one or more Neighbor WUR AP fields 2520 . The WUR operation class field 2512 and the WUR discovery...
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