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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UMTS Radio Resource Control

The sequence of complex valued chips shall be scrambled complex chip-wise multiplication by a complex-valued scrambling code Sdl,n. The terminal randomly selects one of the RACH sub-channels from the group its access class allows it to use. The configuration of RRC inactivity timers in a W-CDMA network has considerable impact on the battery life of a phone when a packet data connection is open. The same scrambling code is used for the message part, but with a code offset.

DecodingUMTS/RRC – rangepublic

Type 14 — PHY information. The best place to see this laid out in a clear way is in 3GPP The major functions of the RRC protocol g3pp connection establishment and release functions, broadcast of system information, radio bearer 225.331, reconfiguration and release, RRC connection mobility procedures, paging notification and release and outer loop power control. The transitions to lower energy consuming states occur when inactivity timers trigger. This symbol sequence is divided into 15 slots of symbols each.

Type 12 — Measurement control information for connected mode, if different from SIB Retrieved 10 April The standard channel model includes rate-matching, but the sizes line up already, so rate-matching is a no-op. The UE selects the scrambling code number by adding the code number of the downlink primary scrambling code and the preamble scrambling code number from SIB5.

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Message encoding is ASN. You can get a “clean” copy of that ASN.

In this case, the scrambling code is thus not necessarily applied aligned with the frame boundary of the physical channel to be scrambled.

As per 3GPP By using this site, you agree to the Terms of Use and Privacy Policy. In case of other downlink channels, the scrambling code shall be applied aligned with the scrambling code applied to the P-CCPCH. This page was last edited on 22 Aprilat Type 13 — ANSI system information. This TTI length is configured by higher layers. From Wikipedia, the free encyclopedia. This corresponds to a spreading factor of, 64, and 32 respectively for the message data part.

Views Read Edit View history. The channel bits are interleaved, split into 2 bit radio frames and interleaved again. N-1 with a repeat period of 8N, where N is a power of 2. 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. There are a maximum of 16 available signatures. 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.

OSI model by layer 7. The data and control parts are transmitted in parallel. That information is very useful for understanding the actual meanings of some of the elements they contain. The downlink power level is measured and the initial RACH power level is set with the proper margin due to the open-loop inaccuracy. Retrieved from ” https: Different operators have different configurations for the inactivity timers, which leads to differences in energy consumption.

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All elements are optional.

Radio Resource Control – Wikipedia

All of the parameters are powers of 2, but the repeat periods can be set independently for each SIB type. Each slot consists of two parts, a data part to which the RACH transport channel is mapped and a control part that carries Layer 1 control information. 3gp corresponds to a spreading factor of for the message control part. The fact that SIBs can span multiple transport frames, or be combined into shared transport frames, further complicates the set of scheduling possibilities.

The UE can start the random-access transmission at the beginning of a number of well-defined time intervals, denoted access slots. Information on what access slots are available for random-access transmission is given by higher layers. Furthermore, the signature is also selected randomly from among the available signatures indicated in SIB5. These chips are formed into QPSK symbols and prepared for transmission with the root-raised-cosine channel filter.

Powered by Trac 0. The channel format and other details are outline in 3GPP There are 15 access slots per two frames and they are spaced chips apart over 2 UMTS frames. The RACH procedures is as follows: The TFCI of a radio frame indicates the transport format of the RACH transport channel mapped to the simultaneously transmitted message part radio frame.

Type 15 — GPS aiding information. Note these comments on 25331 alignment of the scrambling code, from 3GPP