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Method and device for decompressing and compressing uplink data

A data compression and decompression technology, applied in the field of communication, can solve the problems that the base station and terminal compression buffer and decompression buffer cannot be guaranteed to be consistent, and the reliability of uplink data compression cannot be guaranteed.

Active Publication Date: 2017-08-25
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, it is impossible to ensure that the compression cache and decompression cache on both sides of the base station and the terminal are consistent, and thus the reliability of uplink data compression cannot be guaranteed.

Method used

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  • Method and device for decompressing and compressing uplink data
  • Method and device for decompressing and compressing uplink data
  • Method and device for decompressing and compressing uplink data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160] Example 1: There are three fields in the UDC header

[0161] see Figure 10 , a UDC header format includes the following information:

[0162] Indicates whether to perform UDC compression bit field (U: 1 bit);

[0163] The bit field indicating whether the decompression buffer is reset (N: 1 bit);

[0164] Indication bit field for decompression buffer check (C information: 6 bits).

[0165] The PDCP layer of the terminal performs UDC compression on the data sent by the upper layer. If it is determined to send the compressed data packet to the network, set U to 1, and superimpose the data in the compressed buffer area before compression, and fill the last 6 bits of information into the UDC C domain.

[0166] If it is determined not to compress the packet data, then set U to 0. The C field can be filled with a default value or an arbitrary value, and can also be the superimposed last 6 bits of the compressed buffer area.

[0167] If the terminal needs to reset the co...

Embodiment 2

[0170] Example 2: There are four fields in the UDC header

[0171] see Figure 11 , a UDC header format includes the following information:

[0172] Indicates whether to perform UDC compression bit field (U: 1 bit);

[0173] Indicates whether the decompression buffer is reset or not (N: 1 bit)

[0174] Whether to enter the indication bit field of the decompression cache area (I: 1 bit)

[0175] Indication bit field (C information: 6 bits) for decompression buffer check;

[0176] Similar to the foregoing embodiment 1, usages of the U field, N field, and C field in Embodiment 2 are the same. The usage of the above-mentioned I field is introduced below. The I domain indicates whether the packet data will enter the decompression buffer. Regardless of whether the data packet is compressed or not, once I is set to 1, the base station will press the uncompressed data packet (when U is 0) or the decompressed data packet (when U is 1) into the decompression buffer.

Embodiment 3

[0177] Example 3: There are 5 fields in the UDC header

[0178] see Figure 12 , a UDC header format includes the following information:

[0179] Indicates whether to perform UDC compression bit field (U: 1 bit);

[0180] Indicates whether the buffer area is reset or not (N: 1 bit)

[0181] Indicates whether to enter the buffer area bit field (I: 1 bit)

[0182] Indication bit field for buffer check (C information: 4 bits);

[0183] Reserved bit field (R: 2 bits)

[0184] The usage of the U, I and C fields is the same as that of the above-mentioned Embodiment 1 and Embodiment 2, except that the 4-bit C field is used in this embodiment. There are two R field bits that have no defined function for the time being and are reserved for future use.

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Abstract

The embodiment of the invention provides a method and device for decompressing and compressing uplink data. The method for decompressing the uplink data comprises the following steps: a decompression end detects an uplink data compression (UDC) head in a packet data convergence protocol (PDCP) packet after receiving the PDCP packet, wherein the UDC head at least contains compressed context information of a data packet in the PDCP packet and the information related to a decompression cache area, and the information related to the decompression cache area indicates the decompression end to control the decompression cache area of the decompression end to be consistent with a compression cache area of a compression end; and the decompression end performs corresponding operations for the data packet in the PDCP packet according to the compressed context information and the information related to the decompression cache area. According to the method and device provided by the invention, the consistency between the compression cache area of the compression end and the decompression cache area of the decompression end can be guaranteed, and thus the reliability of uplink data compression can be ensured.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method and device for decompressing and compressing uplink data. Background technique [0002] (1) The data transmission process of the existing mobile communication system [0003] Data transmission between UE (User Equipment, user equipment) and eNB (evolved Node B, evolved base station), usually through PDCP (Packet Data Convergence Protocol, packet data convergence protocol), RLC (Radio Link Control, radio link layer Control protocol), MAC (Media Access Control, media access control) and PHY (Physical Layer, physical layer) transmission, each layer completes different data processing. PDCP mainly performs security operations and header compression / decompression processing, such as encryption and integrity protection, ROHC (Robust Header Compression, robust header compression) compression and decompression, etc.; RLC mainly completes segmental concatenation an...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08
CPCH04L69/22H04L67/565H04L67/568H04L69/04H04W28/06H04W80/08
Inventor 全海洋鲍炜邱禹
Owner DATANG MOBILE COMM EQUIP CO LTD
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