May 2014 doc.: IEEE 802.11-14/0519r0
IEEE P802.11 Wireless LANs
WG802.11 Mandatory Draft Review Process
Date: 2013-04-14
Author(s): Name Company Address Phone email Adrian Intel Corporation [email protected] Stephens
Abstract This submission contains a liaison statement from 3GPP TSG RAN WG2.
Submission page 1 Adrian Stephens, Intel Corporation May 2014 doc.: IEEE 802.11-14/0519r0
Liaison Statement
The liaison statement is shown below as an embedded .doc file.
R2-141855 - LS on WLAN signal measurements for WLAN3GPP Radio interworking.doc
The content of this file pasted as unformatted text is shown below.
3GPP TSG-RAN2 Meeting #85bis Tdoc R2-141855 Valencia, Spain, 31st March – 4th April 2014.
Title: LS on WLAN signal measurements for WLAN/3GPP Radio interworking
Source: 3GPP WG RAN 2 To: IEEE 802.11 WG Cc: WiFi Alliance, RAN4, RAN5, SA2, RAN
Contact Person: Name: Mattias Bergström Tel. Number: +46 722441401 E-mail Address:[email protected]
1. Overall Description: 3GPP TSG-RAN WG2 (RAN2) is developing a mechanism for inter-working between 3GPP RATs (UMTS and LTE) and WLAN. The purpose of this inter-working mechanism is to improve access network selection and traffic routing between 3GPP radio access and cellular operator deployed WLAN. For this mechanism RAN2 is considering whether to introduce RCPI as a metric of WLAN signal strength and RSNI as a metric of WLAN signal quality. In this mechanism, the cellular network provides RCPI and/or RSNI thresholds (in addition to other thresholds and parameters) to the terminal. If, for a WLAN AP, the RCPI measured by the terminal is above the RCPI-threshold and/or RSNI measured by the terminal is above the RSNI-threshold (and other conditions are fulfilled), the terminal should steer traffic to the WLAN AP. Additionally, if the RCPI is below a RCPI-threshold and/or RSNI is below an RSNI-threshold (and other conditions are fulfilled) the terminal should steer traffic away from WLAN towards 3GPP radio access network. Note that other metrics than RSNI and RCPI are also considered in this mechanism and RAN2 is still working on the final details of this mechanism. It is also the intention of 3GPP to specify requirements and test terminal compliance to the aforementioned mechanism when introduced. RAN2 expects that such requirements and testing will be specified in 3GPP specifications. Should WLAN radio metrics be introduced in these mechanisms, RAN2 expects that 3GPP will specify requirements based on the IEEE specifications or refer to IEEE specification for the accuracy requirements of the WLAN RCPI and the WLAN RSNI metrics in its specifications.
2. Actions: To IEEE 802.11 WG group: ACTION: RAN2 respectfully asks IEEE 802.11 WG:
Submission page 2 Adrian Stephens, Intel Corporation May 2014 doc.: IEEE 802.11-14/0519r0
Question 1: 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? Question 2: 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? Question 3: Does IEEE 802.11 WG consider any other WLAN signal metric more suitable for the above described mechanism?
3. Date of Next 3GPP RAN2 Meetings: 3GPP RAN2 Meeting #86 19th – 23rd May 2014 Seoul, South Korea. 3GPP RAN2 Meeting #87 18th – 22nd August 2014 Dresden, Germany.
Submission page 3 Adrian Stephens, Intel Corporation