Fixed Reference Measurement Channel

In Release 15, the FRC (Fixed Reference Channel) function was newly introduced to define test models for the Base Station's Interference Cancellation (IC) receiver, as specified in TS 36.141. This introduction supported new performance requirements for features like subslot-PUSCH and sTTI (short Transmission Time Interval). Additionally, corrections were made to the associated FRC indices to ensure accurate enhanced performance requirement testing.

• 36.104 CR for BS IC receiver - FRC definitions TS 36.104CR4694
• Performance requirements for subslot-PUSCH TS 36.104CR4800
• Introduction of FRC for BS IC in 36.141 TS 36.141CR1062
• CR for PUSCH conformance test in TS 36.141 for BS IC TS 36.141CR1080
• New Annex to TR 37.843: Power density measurements close to EUT TS 37.843CR0006
• Correction on FRC indices for enhanced performance requirement type B TS 36.104CR4781

+ 26 more changes

In Release 16, the FRC function was expanded to introduce new performance requirements for the PUSCH under an enhanced High-Speed Train (HST) scenario, including specific demodulation requirements and associated channel model annexes for testing. This release also added new Fixed Reference Channels to support URLLC PUSCH repetition Type A for base station performance requirements. Furthermore, the scope of FRCs was extended in conjunction with the introduction of wider channel bandwidths for various NR operating bands like n1, n7, n28, n38, n50, n66, n77, and n78.

• CR to 36.104 on LTE HST PUSCH conditions TS 36.104CR4873
• CR to TS 36.104: Introduction of PUSCH performance requirements for enhanced HST scenario TS 36.104CR4883
• CR to TS 36.141: Introduction of PUSCH performance requirements for enhanced HST scenario TS 36.141CR1241
• Addition channel bandwidth of 30MHz for n50 in TS 38.104 TS 38.104CR0031
• CR for TS 38.104: adding wider channel bandwidths in Band n7 TS 38.104CR0037
• CR for TS 38.104: adding wider channel bandwidths in Band n77/n78 TS 38.104CR0105

+ 65 more changes

In Release 17, the primary update for the Fixed Reference Channel (FRC) function was the introduction of new channel bandwidths, specifically 35 MHz and 45 MHz, for conformance testing. This expansion required updates to the core technical specifications, including TS 37.104, TS 37.141, and TS 37.145-2, to define the new RF requirements. The changes ensured that the FRCs and related base station measurements supported these additional channel bandwidths as defined for the relevant operating bands.

• CR to 37.104: Introduction of requirements for 35 and 45MHz channel bandwidths TS 37.104CR0949
• CR for TS 37.141: introduction of channel bandwidths 35MHz and 45MHz TS 37.141CR0990
• CR for TS 37.145-2: introduction of channel bandwidths 35MHz and 45MHz TS 37.145CR0314
• Big CR to 38.104 - Additional Channel BW TS 38.104CR0258
• Big CR to 38.104 - Additional Channel BW TS 38.104CR0291
• Big CR to TS 38.104: Adding channel BW support in existing NR bands TS 38.104CR0319

+ 28 more changes

In Release 18, the FRC (Fixed Reference Channel) function was updated to support the newly introduced 3 MHz channel bandwidth for NR, as detailed in the CR to TS 37.113. This change required the update of the specific FRCs used in performance criteria to accommodate this narrower bandwidth configuration. The update ensures that base station receiver requirements, such as demodulation performance, are properly defined and tested for this new channel bandwidth.

• CR to TS 37.141 - Consideration of NR 3 MHz channel bandwidth TS 37.141CR1068
• Big CR to TS 38.104: Adding channel BW support in existing NR bands TS 38.104CR0450
• Big CR to TS 38.104 on introduction of 3 MHz channel bandwidth TS 38.104CR0500
• Big CR to TS 38.104: Adding channel BW support in existing NR bands TS 38.104CR0512
• Big CR for 38.104 on 4Tx PUSCH demodulation requirements TS 38.104CR0537
• Big CR to TS 38.104: Adding channel BW support in existing NR bands TS 38.104CR0538

+ 77 more changes

In Release 19, the primary new development for the Fixed Reference Channel (FRC) function was the introduction of a 7 MHz channel bandwidth for NR FR1, as detailed across multiple technical specifications for base station and UE requirements. This addition required corresponding updates to related RF measurement procedures, including ACLR (Adjacent Channel Leakage power Ratio) and ACS (Adjacent Channel Selectivity), to define the performance criteria for this new bandwidth. Furthermore, the release included specific corrections and restrictions for the 7 MHz channel bandwidth within the conformance testing specifications to ensure proper implementation.

• CR to TS37.104 Introduction of 7 MHz NR FR1 channel bandwidth TS 37.104CR1028
• CR to TS 37.105: 7MHz channel bandwidth introduction TS 37.105CR0304
• CR to TS 37113 - Introduction of 7 MHz channel BW TS 37.113CR0142
• CR to TS37.141 Introduction of 7 MHz NR FR1 channel bandwidth TS 37.141CR1098
• CR to TS 37.145-2: 7MHz channel bandwidth introduction TS 37.145CR0398
• Big CR to TS 38.104: Adding channel BW support in existing NR bands TS 38.104CR0685

+ 40 more changes