Formal request has been received to merge: UMTS-TDD and TD-SCDMA into Universal Mobile Telecommunications System; discuss below. GenQuest "Talk to Me" 13:27, 1 February 2016 (UTC)
In Talk:UMTS (telecommunication)/Archive 1#Confusion surrounding multiple access terminology there's a long discussion of various terms used in various of the articles that were merged into the air interfaces section.
So what is the relationship between "W-CDMA", "UMTS-FDD", "UTRA-FDD", and "IMT-2000 CDMA Direct Spread"? Do they all refer to the same thing? If not, which ones, if any, do refer to the same thing as some other term, and to what do they all refer?
The first paragraph says UTRA-TDD is a UTRA; UTRA links back to UMTS (telecommunication)#Air interfaces, which says:
However, the second paragraph says that UMTS-TDD has two air interfaces, which would indicate that it's not a UTRA, it's a "something else" that has two UTRAs.
which calls TD-CDMA both a "channel access method" and an "air interface". I get the impression that there's more to an "air interface" than a "channel access method"; is that true and, if so, which of those is TD-CDMA? Is UTRA-TDD HCR the air interface, and TD-CDMA its channel access method?