25.331 3GPP PDF
ETSI TS V (). 1. 3GPP TS version Release Reference. RTS/TSGRvd Keywords. UMTS. Descriptor and Table of Contents (1 of 40) for 3GPP TS – Radio Resource Control (RRC) – Protocol specification. 3GPP TS V (). 2. Release Keywords. UMTS, radio. 3GPP. Postal address. 3GPP support office address. Route des Lucioles.
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The terminal randomly selects one of the RACH sub-channels from the group its access class allows it to use. In case of other downlink channels, the scrambling code shall be applied aligned with the scrambling code applied to the P-CCPCH. The purpose of this procedure is to establish the appropriate uplink power level for the UE, since CDMA is exquisitely sensitive to variations in relative received power.
These chips are formed into QPSK symbols and prepared for transmission with the root-raised-cosine channel filter. Type 3 — Cell identity and reselect information, similar to GSM cell selection parameters Type 4 — Cell reselect parameters for connected mode, if different from those in SIB3. The transitions to lower energy consuming states occur when inactivity timers trigger.
Type 15 — GPS aiding information. Different operators have different configurations for the inactivity timers, which leads to differences in energy consumption. The simplest 25.31 to schedule the messages 3gppp be: List of mobile phone generations.
The timing of the access slots and the acquisition indication is described in subclause 7. The best place to see this laid out in a clear way is in 3GPP N-1 with a repeat period of 8N, where N is a power of 2. The TFCI of a radio frame indicates the transport format of the RACH transport channel mapped to the simultaneously transmitted message part radio frame. The sequence of complex valued chips shall be scrambled complex chip-wise multiplication by a complex-valued scrambling code Sdl,n.
This page was last edited on 22 Aprilat The data and control parts are transmitted in parallel. A 1 ms RACH preamble is sent with the selected signature. Languages Deutsch Svenska Edit links. You can get a “clean” copy of that ASN. More details are in 3GPP The BCH transport block 3gp always bits, including a header and data fields. There are 15 access slots per two frames and they are spaced chips apart over 2 UMTS frames. RACH transmissions from the user consists of two parts: Typically the RACH preamble detection and AICH response is done solely in the physical layer since there is no information or handling needed from the higher layers.
Information on what access slots are available for random-access transmission is given by higher layers. The preamble is retransmitted in the next available access slot.
Type 14 — PHY information.
www.3gpp.org – /ftp/Specs/archive/25_series/25.331/
The operation of the RRC is guided by a state machine which defines certain specific states that a UE may be present in. All of the parameters are powers of 2, but the repeat periods can be set independently for each SIB type.
That information is very useful for understanding the actual meanings of some of the elements they contain. Message encoding is ASN. Type 12 — Measurement control information for connected mode, if different from SIB A 10 ms message part consists of one message part radio frame, while a 20 ms message part consists of two consecutive 10 ms message part radio frames.
Radio Resource Control – Wikipedia
Type 13 — ANSI system 3tpp. The set of available signatures is indicated by the SIB5 message, and the UE uses the ASC to determine the subset of that set and access slot to use. The channel bits are interleaved, split into 2 bit radio frames and interleaved again. OSI model by layer 7.
Furthermore, the signature is also selected randomly from among the available signatures indicated in SIB5. Retrieved from ” https: Type g3pp — Neighbor identities.
This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November and incorporated under the “relicensing” terms of the GFDLversion 1. The downlink power level is measured and the initial RACH power level is set with the proper margin due to the open-loop inaccuracy.