Subject: Liaison on WLAN signal measurements for WLAN/3GPP Radio interworking Date: 2014-05-12 Dear Mattias, Thank you very much for your letter that we received on 2014-04-14. In your letter you asked the IEEE 802.11 Working Group the following three questions: Does IEEE 802.11 WG consider WLAN RCPI a suitable metric of WLAN signal strength such that it can be compared to thresholds as in the above described mechanism? Does IEEE 802.11 WG consider WLAN RSNI a suitable metric of WLAN signal quality such that it can be compared to thresholds as in the above described mechanism? Does IEEE 802.11 WG consider any WLAN signal metric more suitable for the above described mechanism? We answer your questions as follows. Regarding Question 1: We consider the WLAN RCPI metric defined in IEEE 802.11™-2012 unsuitable for the purpose of access network selection and traffic routing as described in your letter. Regarding Question 2: We consider the RSNI value defined IEEE 802.11™-2012 unsuitable for the purpose of access network selection and traffic routing as described in your letter. Regarding Question 3: We consider the use of estimated and/or measured values of WLAN throughput to be more appropriate for the mechanism described. Sincerely, Adrian Stephens IEEE 802.11 Working Group Chair References:
Subject: Liaison on WLAN signal measurements for WLAN/3GPP Radio interworking Date: 2014-05-12 Dear Mattias, Thank you very much for your letter that we received on 2014-04-14. In your letter you asked the IEEE 802.11 Working Group the following three questions: Does IEEE 802.11 WG consider WLAN RCPI a suitable metric of WLAN signal strength such that it can be compared to thresholds as in the above described mechanism? Does IEEE 802.11 WG consider WLAN RSNI a suitable metric of WLAN signal quality such that it can be compared to thresholds as in the above described mechanism? Does IEEE 802.11 WG consider any WLAN signal metric more suitable for the above described mechanism? We answer your questions as follows. Regarding Question 1: We consider the WLAN RCPI metric defined in IEEE 802.11™-2012 unsuitable for the purpose of access network selection and traffic routing as described in your letter. Regarding Question 2: We consider the RSNI value defined IEEE 802.11™-2012 unsuitable for the purpose of access network selection and traffic routing as described in your letter. Regarding Question 3: We consider the use of estimated and/or measured values of WLAN throughput to be more appropriate for the mechanism described. Sincerely, Adrian Stephens IEEE 802.11 Working Group Chair References: