Adaptive method for switching between single flow mode and double flow mode

A technology of adaptive switching and dual-stream mode, which is applied in the field of communication, can solve problems such as not a perfect solution, and achieve the effect of improving the throughput of downlink high-speed packet services

Active Publication Date: 2009-02-11
ZTE CORP
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Problems solved by technology

However, whether it is a single-stream mode based on spatial diversity or a dual-stream mode based on

Method used

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  • Adaptive method for switching between single flow mode and double flow mode
  • Adaptive method for switching between single flow mode and double flow mode
  • Adaptive method for switching between single flow mode and double flow mode

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Embodiment Construction

[0029] The specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] figure 1 It is a flow chart of a method for adaptively switching between a single-stream mode and a dual-stream mode for a time-division synchronous code division multiple access system according to the present invention. Wherein, an independent antenna is added to the user terminal, so that the user terminal in the system has two independently fading antennas. The two channels from the Node B to the user terminal mix to cover the coverage area and transmit two transmission blocks to the user terminal at the same time.

[0031] like figure 1 As shown, the adaptive switching method includes the following steps:

[0032] S102, Node B estimates the uplink channel, and evaluates the spatial channel cross-correlation of two transmission blocks in real time according to the channel estimation result.

[0033] S104. Switch to ...

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Abstract

The invention provides a method for self-adapted switch between a single-current mode and a double-current mode, which is used in a time division SCDMA (Synchronous Code Division Multiple Access) system, wherein, a self-adapted switch method comprises the following steps: S102, a nodal point B estimates an uplink channel, and evaluates the cross correlation of the spatial channel between two transmitting blocks; S104, under the circumstances that the cross correlation of the spatial channel is higher than a first threshold value, the system switches to the single-current mode, and under the circumstances that the cross correlation of the spatial channel is lower than the first threshold value, the subsequent single-current and double-current throughputs are estimated; S106, a nodal point B estimates the throughputs of the single-current mode and the double-current mode according to an instruction of the channel quality of the instruction of the channel quality of the single-current mode and the double-current mode, and under the circumstances that the throughput of the double-current mode is larger than the throughput of the single-current mode by a second threshold, the system switches to the double-current mode, otherwise the system switches to the single-current mode.

Description

technical field [0001] The invention relates to the communication field, in particular to an adaptive switching method for a single-stream mode and a dual-stream mode for a time-division synchronous code division multiple access system. Background technique [0002] Multiple-Input-Output (MIMO) technology is a hot research field in the field of mobile communication in recent years, and it is characterized in that both wireless transmitters and receivers introduce multiple antennas. Compared with the traditional single-input single-output (SISO) system, the MIMO system obtains a great increase in system capacity through space diversity technology or space multiplexing technology. Multiple-input single-output (MISO) and single-input multiple-output (SIMO) are two special forms of MIMO, that is, multiple antennas are only used at one end of the communication link, and a single antenna is still used at the other end. [0003] The mainstream solution for indoor coverage of the e...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04B7/04H04J11/00
Inventor 耿鹏江海傅强林伟
Owner ZTE CORP
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