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Method and apparatus for sending and receiving data

A data and coded data technology, applied in the field of receiving and data transmission, can solve problems such as interference and reduce the reliability of data transmission, and achieve the effect of improving reliability

Active Publication Date: 2012-05-23
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the first cell and the second cell are adjacent cells, if the first user in the first cell and the second user in the second cell use the same codeword, that is, the first user and the second user use the same codeword Modulate the transmitted data, and / or demodulate the received data, then when the first user performs modulation and / or demodulation, the second user will cause interference to the first user, and similarly, the second user modulates And / or when demodulating, the first user will also cause interference to the second user, thereby reducing the reliability of data transmission

Method used

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  • Method and apparatus for sending and receiving data
  • Method and apparatus for sending and receiving data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, a method for sending data, see figure 1 , the method includes:

[0036] 101. Generate a second codeword that changes with time according to the first codeword.

[0037] The first codeword is the logical codeword assigned by the cell to the user. The logical codewords of different cells within a base station can be the same or different. The base station allocates a set of logical codewords according to time-frequency resources. Logical codewords are obtained from the codeword set.

[0038] In order to prevent the first user of the first cell and the second user of the second cell from using the same first codeword, according to the first codeword, a second codeword that changes with time is generated, and the second codeword obtained by the first user The second codeword obtained by the second user may be different, thereby reducing the collision of users in different cells using the same second codeword, reducing interference between users in different ...

Embodiment 2

[0083] Embodiment 2, the data sending method and data receiving method in Embodiment 1 can be applied in various communication networks, for example, the third generation mobile communication system (3G), local multipoint distributed service (LMDS), multipoint multi Channel Distributed System Technology (MMDS) and Microwave Access Worldwide Interoperability System (WiMAX), etc., this embodiment applies the data transmission method in Embodiment 1 to OFDMA with block repetition in the above communication network (BR-OFDMA) technology.

[0084] see image 3 , the method for sending data in this embodiment includes:

[0085] 301. Data is received from a higher layer of the protocol layer.

[0086] 302. Perform channel coding on the data to obtain coded data; the coding manner may include puncturing and / or interleaving.

[0087] 303. Perform symbol modulation on the coded data, and modulate the bit data stream into a symbol data stream to obtain symbol data. The symbol modulati...

Embodiment 3

[0096] In the third embodiment, the data sending method in the first embodiment is applied to the variable length block spread OFDMA (VBS-OFDMA) technology in the communication network.

[0097] see Figure 5 , the method for sending data in this embodiment includes:

[0098] 501. Data is received from a higher layer of the protocol layer.

[0099] 502. Perform channel coding on the data to obtain coded data; the coding manner may include puncturing and / or interleaving.

[0100] 503. Perform symbol modulation on the coded data, and modulate the bit data stream into a symbol data stream to obtain symbol data. The symbol modulation manner may include BPSK, QPSK, 16QAM, 64QAM, or VSB.

[0101] 504. Divide the symbol data to generate a unit block.

[0102] 505. Using the first codeword, the cell number, and time as parameters of the second function, generate a second codeword. In this embodiment, the first codeword and the second codeword are respectively orthogonal spreading s...

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PUM

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Abstract

The invention discloses a method for providing data sending and receiving and a device thereof. The method for sending data comprises the following steps: according to a first coding word, generating a second code word changed along with time; using the second code word to expand the data to acquire expanded data; modulating the expanded data to acquire the modulated data; and sending the modulated data. With the method for sending and receiving data and the device thereof, a first user of a first cell and a second user of a second cell receive the same first coding word and acquire the second coding word respectively along the time change according to the first coding word; the second code word acquired by the first coding word is likely different from the second coding word acquired by the second user; therefore, when the second coding word is used to modulate / demodulate the data, no interference is caused between the first user and the second user, thereby improving reliability of data transmission.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to methods and devices for sending and receiving data. Background technique [0002] With the rapid development of high-speed network technology and multimedia technology, the development of wireless network is extremely rapid. The development trend of wireless network gradually evolves from circuit switching to packet switching, and various wireless broadband access technologies emerge in endlessly. [0003] One way of wireless broadband access is to allow different users to occupy different time-frequency resources, that is, codewords are used to represent time-frequency resources, different codewords represent different time-frequency resources, and users use different codewords to occupy different time-frequency resources. time-frequency resources. [0004] In the process of realizing the present invention, the inventor found that adopting this wireless broadband access method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 唐臻飞
Owner SHANGHAI HUAWEI TECH CO LTD