{"id":690055,"date":"2024-11-06T05:20:49","date_gmt":"2024-11-06T05:20:49","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/tia-tsb-102-bbaa2010\/"},"modified":"2024-11-06T05:20:49","modified_gmt":"2024-11-06T05:20:49","slug":"tia-tsb-102-bbaa2010","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/tia\/tia-tsb-102-bbaa2010\/","title":{"rendered":"TIA TSB-102.BBAA:2010"},"content":{"rendered":"

Scope of the P25 Two-Slot TDMA Standard<\/strong><\/p>\n

This document describes the P25 Phase 2 Two-Slot TDMA Standard
\nin a general way. The P25 Phase 2 Two-Slot TDMA Standard is a suite
\nof P25 standards documents. The high level technical scope of the
\nP25 Two-Slot TDMA Standard includes the following major items.<\/p>\n

\u2022\u00a0Interface Description of the Um2 interface designated for
\nthe P25 Phase 2 TDMA Two-Slot CAI.<\/p>\n

\u2022\u00a0TDMA CAI for Two-Slots operating at a gross bit rate of
\n12 kb\/s with Harmonized-Continuous Phase Modulation (H-CPM) for the
\ninbound link and Harmonized-Differential Quadratrure Phase Shift
\nKeying (H-DQPSK) modulation for the outbound link. The P25 Two-Slot
\nTDMA CAI is divided into a Physical layer (PHY) and a Media Access
\nControl layer (MAC) to facilitate TDMA operation.<\/p>\n

\u2022\u00a0Dual Rate Vocoder at a gross bit rate of 7.2 kb\/s for the
\nfull rate for use with Phase 1 and 3.6 kb\/s for the half rate for
\nuse with Phase 2.<\/p>\n

\u2022\u00a0Trunking control signals using MAC Protocol Data Units
\n(PDUs).<\/p>\n

o The MAC PDUs are compatible with Phase 1 addressing and
\ntrunking functions.<\/p>\n

o The Phase 1 trunking control channel also has additions to
\naddress TDMA calls and control TDMA operation for ease of
\nmigration.<\/p>\n

\u2022\u00a0Encryption for voice messages uses the Message Indicator
\n(MI), Key ID (KID), and Algorithm ID (ALGID) combined into an
\nEncryption Sync Signal (ESS) that is compatible with the
\ndefinitions used in Phase 1.<\/p>\n

\u2022\u00a0Use of FDMA for Phase 1 trunking interoperability and
\ndirect mode (talkaround).<\/p>\n

\u2022\u00a0Standardized signaling allowing optional synchronization
\nof FDMA Control Channel (CCH) and TDMA Traffic Channel (TCH) for
\nbetter access time.<\/p>\n

Future work:<\/p>\n

\u2022\u00a0Harmonized-Differential 8 Phase Shift Keying (H-D8PSK)
\nmodulation for downlink for improved simulcast delay spread.<\/p>\n

\u2022\u00a0Slotted control channel:<\/p>\n

o Single slot TDMA CCH (either one of the Two-Slots running CCH
\nprotocol) \u2013 allows control and voice on a single RF channel.<\/p>\n

o Composite Control Channel (dynamically running one or no slots
\nwith CCH protocol) \u2013 allows voice operations on both slots of a
\nsingle RF channel implementation.<\/p>\n

o Full TDMA CCH where both slots run the CCH protocol.<\/p>\n

\u2022\u00a0Slotted data channel for OTAR or other data
\napplications.<\/p>\n

\u2022\u00a0Scrambling of the TDMA CCH and the Data Channel
\n(DCH).<\/p>\n

\u2022\u00a0Development of a vehicular repeater tp support TDMA.<\/p>\n

\u2022\u00a0Development of a P25 Four-Slot TDMA Standard, including
\nspecification of P25 defined Four-Slot TDMA protocols for a P25
\nFour-Slot TDMA CCH, TCH, and DCH.<\/p>\n","protected":false},"excerpt":{"rendered":"

Project 25 – Two-Slot TDMA Overview<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
TIA<\/b><\/a><\/td>\n2010<\/td>\n32<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":690065,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2646],"product_tag":[],"class_list":{"0":"post-690055","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-tia","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/690055","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/690065"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=690055"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=690055"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=690055"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}