uracy LTE-FDD +50 pbb 3GPP TS LTE-TDD Wide area BS +50 pbb 3 us for small cell (< 3 km cell radius) 36.133 10 us for large cell (> 3 km cell radius) LTE-A/LTE-A Pro +50 pbb (wide 3GPP TS Wide area area) 36.133 +100 pbb (local area) 3GPP TR 3 us for small cell (< 3 km cell radius) 250 pbb 36.922 (Home eNB) 10 us for large cell (> 3 km cell radius) Home eNB 3 us for small cell (< 500 m cell radius) +1.33 us + air propagation delay for large cell (> 500 m cell radius) 3GPP TS LTE MBSFN +50 pbb 36.133 LTE-TDD to CDMA 1xRTT and 3GPP TS HRPD handovers +50 pbb 10 us (timing deviation) 36.133 +10 us (up to 8 hours during holdover) However, for some of the techniques covered in the previous sections, there are specific phase syn- chronization requirements with differing levels of strictness based on the specific technique being implemented. For those use cases, the phase accuracy requirements at the eNB interface are cap- tured in Table 10-13. Table 10-13 Summary of Phase Synchronization Requirements for LTE-A Applications Phase LTE-Advanced Type of Coordination Reference Accuracy 3GPP TS eICIC Enhanced Inter-cell interference coordination < 3 us 36.133 3GPP TS CoMP moderate UL coordinated scheduling < 3 us 36.104 3GPP TS DL coordinated scheduling 36.133 3GPP TS CoMP tight DL coordinated beamforming < 3 us 36.104 3GPP TS DL noncoherent joint transmission 36.133 UL joint processing UL selection combining UL joint reception 3GPP TS Tx diversity transmission at each carrier frequency 65 ns 36.104 LTE positioning using OTDOA for 40-60 m with min- 3GPP TR Location accuracy 200 ns imum three base stations 37.857 ITU-T G.8271 2020-03 Carrier Aggregation LTE intra-band noncontiguous CA with or without MIMO 3GPP TS 260 ns and MIMO or Tx diversity 36.104 LTE inter-band CA with or without MIMO or Tx diversity 260 ns LTE intra-band contiguous CA with or without MIMO or 130 ns Tx diversity LTE MIMO or Tx diversity at each carrier frequency 65 ns Maximum Transmission Time Difference in intra-band 30.26 us noncontiguous and inter-band C