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WF on NB-IoT Radio Link Monitoring Performance Test Procedure

R4-79AH-0262. 3GPP TSG-RAN WG4 #79- AH Hong Kong, 28 th – 30 th June, 2016. WF on NB-IoT Radio Link Monitoring Performance Test Procedure. Qualcomm Incorporated, …. Background. In RAN4#79, RAN4 discussed RLM test procedure

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WF on NB-IoT Radio Link Monitoring Performance Test Procedure

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  1. R4-79AH-0262 3GPP TSG-RAN WG4 #79-AH Hong Kong, 28th – 30th June, 2016 WF on NB-IoT Radio Link Monitoring Performance Test Procedure Qualcomm Incorporated, …

  2. Background • In RAN4#79, RAN4 discussed RLM test procedure • The legacy RLM tests have an SNR variation as shown in figure below • Periodic CQI transmission on UL is used to test UE IS/OOS behaviour

  3. NB-IoT RLM Test Proposal • Proposed SNR variation for OOS testing for RLM SNR1 SNR3 T2 B D C T1 A T3

  4. NB-IoT RLM Test Proposal • OOS Proposed Test Procedure • The UE behaviour in each test during time durations T1, T2, T3 shall be as follows: • During the period up to time point A, • eNB shall provide the UE with a UL grant • UE is expected to decode the UL grant, • switch to UL, and complete the UL transmission • UE switches back to DL • During the period from time point A to time point B, • SNR shall be linearly decreases from SNR 1 to SNR 3 • During the period from time point B to time point D, • Option 1 • eNB shall provide the UE with a UL grant • UE is expected to decode the UL grant, • UE switches back to DL • The above 3 steps are repeated ‘[10]’ times to ensure UE decoded NPDCCH at least once during T3 • Option 2 • UE initiates RRC-re-establishment procedure after T310 expires during T3 • The UE shall stop transmitting uplink signal no later than time point C and continues to keep its transmitter off until point D

  5. NB-IoT RLM Test Proposal • Test Requirements(cont’d) • The UE shall stop transmitting uplink signal at least in all sub frames configured for UL transmission according to the configured UL grant no later than time point D ([TBD] ms after the start of time duration T3). • The rate of correct events observed during repeated tests shall be at least 90%

  6. NB-IoT RLM Test Proposal • Proposed SNR variation for IS testing for RLM SNR1 SNR3 C D A B T2 T1 T3

  7. NB-IoT RLM Test Proposal • IS Proposed Test Procedure • The UE behaviour in each test during time durations T1, T2, T3 shall be as follows: • During the period up to time point B, • Option 1 • eNB shall provide the UE with a UL grant • UE is expected to decode the UL grant, • UE switches back to DL • The above 3 steps are repeated ‘[10]’ times to ensure UE decoded NPDCCH at least once during T3 • Option 2 • UE initiates RRC-re-establishment procedure after T310 expires during T3 • The UE shall stop transmitting uplink signal no later than time point C and continues to keep its transmitter off until point D • During the period from time point B to time point C, • SNR shall be linearly increases from SNR 1 to SNR 3 • During the period from time point C to time point D, • eNB shall provide the UE with a UL grant • UE is expected to decode the UL grant, • switch to UL, and complete the UL transmission • UE switches back to DL

  8. NB-IoT RLM Test Proposal • Test Requirements(cont’d) • The UE shall start transmitting uplink signal at least in all sub frames configured for UL transmission according to the configured UL grant no later than time point D ([TBD] ms after the start of time duration T3) • The rate of correct events observed during repeated tests shall be at least 90%

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