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Method for realizing downward control channel in wireless communication system

A wireless communication system and control channel technology, which is applied in the field of realization of downlink control channels in wireless communication systems, can solve problems such as control channel and data multiplexing, achieve reliable transmission, ensure robustness, and reduce overhead

Inactive Publication Date: 2009-12-23
ZTE CORP
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for realizing the downlink control channel in the wireless communication system, which solves the multiplexing problem of the control channel and data in the traditional broadband wireless access system, and can increase the power of the control channel as required , to ensure reliable transmission of the control channel

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  • Method for realizing downward control channel in wireless communication system
  • Method for realizing downward control channel in wireless communication system
  • Method for realizing downward control channel in wireless communication system

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Embodiment Construction

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods, taking a broadband cellular wireless communication system as an example.

[0027] Such as figure 2 As shown, it is a schematic diagram of the composition of basic resource blocks and downlink subframe units in the present invention. In an OFDMA system, in order to reduce the overhead of system resource assignment, a subframe unit is divided into a plurality of basic resource blocks 201, and the basic resource blocks 201 are composed of time domain and frequency two-dimensional resources. A subframe unit is composed of a basic resource block 201 with a fixed size, and the size of the basic resource block 201 is M subcarriers×N OFDM symbols.

[0028] In figure (a), each basic resource block 201 is composed of orthogonal subcarriers and OFDM symbols, the number of orthogonal subcarriers is 9, and the number of OFDM symbols is 6....

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Abstract

The invention discloses a method for realizing a downward control channel in a wireless communication system, which comprises the following steps: a base station determines a downward subframe unit containing a control channel and sends the position information of the control channel in a unit frame in superframe control information, wherein the downward subframe unit comprises a basic resource block; the basic resource block consists of two-dimensional resources of time domain and frequency; and the base station sends a control message and data on the control channel and the basic resource block occupied by data in a frequency-division multiplexing mode. The invention provides a novel control channel design, solves the multiplexing problem of the control channel and the data in a conventional broadband wireless access system and can promote the power of the control channel as required, guarantee the reliable transmission of the control channel, maintain the fixing of the basic resource block in the subframe unit and further reduce the expense of resource distribution.

Description

technical field [0001] The invention relates to a mobile communication technology, in particular to a method for realizing a downlink control channel in a wireless communication system. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) greatly reduces the sensitivity of the system to frequency selectivity of multipath fading channels by converting high-speed transmission data streams into low-speed parallel transmission data streams. By introducing a cyclic prefix, OFDM further enhances the ability of the system to resist inter-symbol interference. In addition, the characteristics of high bandwidth utilization and simple implementation make OFDM more and more widely used in the field of wireless communication. [0003] In a traditional wireless communication system, when a base station schedules radio resources of an air interface, one radio frame is generally used as a scheduling period, and the base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/16H04L12/18H04L27/26
Inventor 李艳
Owner ZTE CORP
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