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Bit swapping for different interleaving depths

A technology of interleaving depth and bit exchange, which is applied in the direction of transmission modification based on link quality, code conversion, and signaling features, and can solve the problems of different interleaving schemes and interleaving depths for bit exchange

Inactive Publication Date: 2006-07-05
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the bit swap must handle different interleaving schemes and interleaving depths I

Method used

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  • Bit swapping for different interleaving depths
  • Bit swapping for different interleaving depths
  • Bit swapping for different interleaving depths

Examples

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Embodiment Construction

[0046] Figure 3 shows the structure of a radio packet for a full rate 8-PSK channel in GSM / EDGE Flexible Layer 1 (FLO). Each transport block, which contains layer 2 binary data of a traffic channel (TrCH), is extended with a cyclic redundancy check (CRC) additional segment to obtain a coded block, followed by channel coding and rate matching to obtain a radio frame. In Fig. 3, only radio frames 4-0 and 4-(S-1) respectively corresponding to TrCH(0) and TrCH(S-1) are shown, where S represents the number of active TrCHs. For each radio packet to be transmitted, one radio frame 4-s from each active TrCH is transmitted, s = 0, . . . , S-1 for TrCH multiplexing. These radio frames are multiplexed serially 4-s into the Coded Combination Transport Channel (CCTrCH). After adding TFCI bit 6 at the beginning of CCTrCH bit 7, a non-interleaved radio packet 8 is obtained. In this example, TFCI bit 6 is configured as 72 bits, and the radio packet 8 includes 1392 bits in total.

[0047] Th...

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Abstract

The invention relates to a method, a system and a computer program product for bit swapping, wherein periodically I successive bits of a data packet that comprises K bits are mapped onto interleaved bit positions in I different bursts, respectively, according to a predefined interleaving scheme and a selected interleaving depth I, comprising the step of swapping the value of at least one bit that is associated with a respective first bit position m in the data packet with the value of a bit that is associated with a respective second bit position n in the data packet, wherein the respective second bit position n is selected such that n>m holds and that the difference n-m is divisible by I.

Description

technical field [0001] The present invention relates to a method for bit swapping, wherein according to a predefined interleaving scheme and a selected interleaving depth I, periodically map I consecutive bits in a data packet comprising K bits to I different The interleaving bit position of the burst includes exchanging at least one bit value associated with each first bit position m in the data packet with a bit value associated with each second bit position n in the data packet, wherein each of the first bit positions is selected The two-bit position n holds n>m, and the difference between n-m is divisible by 1. Background technique [0002] In most prior art communication systems, information from an information source is converted into bits, source and channel coded, interleaved, and modulated for transmission over a transmission medium, which can be a transmit and receive Space between antennas or wired connections such as cables or optical fibers. Among the diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/18
CPCH04L1/007H04L27/18H04L1/0025H04L1/0071H04L1/0072H04L1/0083H03M13/2789H03M7/00H04L1/00
Inventor 伯努瓦·塞比尔
Owner NOKIA CORP