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Method for transmitting skip-frequency signal

A frequency hopping and signaling technology, which is applied in the field of frequency hopping of uplink multi-users in a single-carrier frequency division multiple access system, and can solve the problems of inability to utilize flexible scheduling and communication difficulties.

Inactive Publication Date: 2011-08-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the use of resources is always stable, the benefits of flexible scheduling cannot be utilized. Under typical frequency selective fading channels, there will be a long time in the deep fading interval, resulting in communication difficulties

Method used

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  • Method for transmitting skip-frequency signal
  • Method for transmitting skip-frequency signal
  • Method for transmitting skip-frequency signal

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Embodiment Construction

[0026] In order to facilitate a deep understanding of the technical content of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The characteristics of semi-stable scheduling are: considering the voice silent period of conversational services, if a user makes a resource request, a resource is allocated to the user, and if the silent period enters, the resource is released to other users. If the usage is continuous and stable in time or in accordance with frequency hopping, the resource is predefined; in special cases, if the user request does not receive a clear response, the user will transmit on the predefined resource. Such as figure 1 As shown: when the uplink user has data transmission, it first makes a scheduling request, and if the downlink gives a confirmation message, then transmits the corresponding VoIP data packet. When the base station cannot demodulate th...

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Abstract

The method comprises: 1) when user initially requests the resource scheduling, the base station allocates a set of frequency-hopping parameters; 2) when base station detects that there is no data transmitted from user, or user doesn't request the transmission, the user stops the frequency hopping; 3) when user re-requests the scheduling, the user still uses the previous frequency-hopping parameters or uses the new re-allocated frequency parameters.

Description

technical field [0001] The invention relates to a mobile communication system, in particular to an uplink multi-user frequency hopping method of a single carrier frequency division multiple access system in 3GPP LTE. Background technique [0002] In order to meet people's ever-growing needs for mobile communication, there are some basic requirements in the selection of uplink wireless transmission technology: such as supporting scalable bandwidth, moderate PAPR / CM, ensuring the orthogonality of uplink transmission, etc. The single-carrier transmission scheme SC-FDMA has a lower PAPR (peak-to-average ratio) / CM (cubic metric), can improve power efficiency and expand coverage, and has become a basic candidate for LTE uplink transmission. [0003] There are two data transmission schemes based on subcarrier mapping: Distributed Frequency Division Multiple Access (DFDMA) and Localized Frequency Division Multiple Access (LFDMA). The scheme based on distributed subcarrier allocatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/713H04W4/20H04W72/14
Inventor 张峻峰赵建平王亚峰路淼
Owner ZTE CORP
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