Secure transfer of positioning integrity KPI
Systems and methods for managing the secure transmission of positioning integrity KPIs and associated information are provided. A network node provides a key configured to decode positioning integrity assistance information. A wireless device can receive encrypted positioning integrity assistance information and use the key to decrypt the information and perform positioning method(s) in accordance with the decrypted positioning integrity assistance information.
1 . A method performed by a wireless device, the method comprising:
receiving, from a network node, a first key configured to decode positioning integrity assistance information;
receiving encrypted positioning integrity assistance information, wherein the positioning integrity assistance information includes at least one integrity key performance indicator (KPI) for estimating an integrity level associated with an estimated position of the wireless device;
decrypting the encrypted positioning integrity assistance information using the first key received from the network node; and
performing positioning measurements using the decrypted positioning integrity assistance information, wherein performing positioning measurements includes:
determining the estimated position of the wireless device; and
estimating the integrity level associated with the estimated position in accordance with the decrypted positioning integrity assistance information.
2 . The method of claim 1 , wherein the encrypted positioning integrity assistance information is received via a broadcast message.
3 . The method of claim 1 , wherein the encrypted positioning integrity assistance information is received via an LTE Positioning Protocol (LPP) message.
4 . The method of claim 3 , wherein the LPP message includes cyclic redundancy check (CRC) information associated with the encrypted positioning integrity assistance information.
5 . The method of claim 3 , further comprising, computing a cyclic redundancy check (CRC) on the encrypted positioning integrity assistance information.
6 . The method of claim 1 , further comprising, receiving a non-encrypted part of the positioning integrity assistance information.
7 . The method of claim 1 , further comprising, responsive to detecting a cell change, determining a validity of the first key.
8 . The method of claim 7 , further comprising, responsive to determining that the first key is not valid, requesting a second key configured to decode positioning integrity assistance information.
9 . The method of claim 1 , further comprising, transmitting, to a network node, the estimated position of the wireless device.
10 . The method of claim 1 , further comprising, transmitting, to a network node, the integrity level associated with the estimated position of the wireless device.
11 . The method of claim 1 , wherein the positioning integrity assistance information is modified in accordance with at least one of: a different integrity level dependent on the type of positioning service, and a requirement of secure delivery of positioning integrity assistance information.
12 . A wireless device comprising a radio interface and processing circuitry configured to:
receive, from a network node, a first key configured to decode positioning integrity assistance information;
receive encrypted positioning integrity assistance information, wherein the positioning integrity assistance information includes at least one integrity key performance indicator (KPI) for estimating an integrity level associated with an estimated position of the wireless device;
decrypt the encrypted positioning integrity assistance information using the first key received from the network node; and
perform positioning measurements using the decrypted positioning integrity assistance information, wherein performing positioning measurement includes:
determining the estimated position of the wireless device; and
estimating the integrity level associated with the estimated position in accordance with the decrypted positioning integrity assistance information.
13 . The wireless device of claim 12 , wherein the encrypted positioning integrity assistance information is received via a broadcast message.
14 . The wireless device of claim 12 , wherein the encrypted positioning integrity assistance information is received via an LTE Positioning Protocol (LPP) message.
15 . The wireless device of claim 14 , wherein the LPP message includes cyclic redundancy check (CRC) information associated with the encrypted positioning integrity assistance information.
16 . The wireless device of claim 14 , further configured to compute a cyclic redundancy check (CRC) on the encrypted positioning integrity assistance information.
17 . The wireless device of claim 12 , further configured to receive a non-encrypted part of the positioning integrity assistance information.
18 . The wireless device of claim 12 , further configured to, responsive to detecting a cell change, determine a validity of the first key.
19 . The wireless device of claim 18 , further configured to, responsive to determining that the first key is not valid, request a second key configured to decode positioning integrity assistance information.
20 . The wireless device of claim 12 , further configured to transmit, to a network node, the estimated position of the wireless device.
21 . The wireless device of claim 12 , further configured to transmit, to a network node, the integrity level associated with the estimated position of the wireless device.
22 . The wireless device of claim 12 , wherein the positioning integrity assistance information is modified in accordance with at least one of: a different integrity level dependent on the type of positioning service, and a requirement of secure delivery of positioning integrity assistance information.