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Switching method and switching system of transmission mode in downlink multi-input and multi-output mode

A transmission mode, multi-output technology, applied in the field of communication, can solve the problems of not bringing higher data transmission rate, low downlink transmission rate, high throughput, etc., to reduce the time of maintaining in the transmission diversity mode, and achieve high throughput. , the effect of reducing the processing time

Active Publication Date: 2012-08-15
DATANG MOBILE COMM EQUIP CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] To sum up, in the prior art schemes for switching transmission modes in the downlink MIMO mode, the transmission diversity mode is always selected as much as possible to ensure the signal-to-noise ratio and diversity gain at the receiving end; The downlink transmission rate is twice as low, so the existing technology cannot bring higher data transmission rate and greater throughput

Method used

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  • Switching method and switching system of transmission mode in downlink multi-input and multi-output mode
  • Switching method and switching system of transmission mode in downlink multi-input and multi-output mode
  • Switching method and switching system of transmission mode in downlink multi-input and multi-output mode

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Embodiment 1

[0152] and image 3 Corresponding to the method embodiments, the present application also provides Embodiment 1 of a transmission mode switching system in downlink MIMO mode, which may specifically include:

[0153] The first switching device is configured to switch the transmission mode in the downlink MIMO mode from transmission diversity to space division multiplexing when the number of times the first switching condition is established satisfies the first threshold in the transmission diversity mode;

[0154] Wherein, the first handover condition may specifically include: the downlink channel quality parameter counted by the base station side meets the channel quality condition for handover, and the actual downlink throughput of the UE is greater than or equal to the channel quality condition of the handover in transmit diversity mode and the current The theoretical maximum throughput corresponding to the scheduling parameter.

[0155] In a preferred embodiment of the pre...

Embodiment 2

[0163] and Figure 5 Corresponding to the method embodiment, the present application also provides an embodiment 2 of a transmission mode switching system in the downlink MIMO mode, which may specifically include:

[0164] The second switching device, in the space division multiplexing mode, switches the transmission mode in the downlink MIMO mode from space division multiplexing to transmission diversity when the number of times the second switching condition is established satisfies the second threshold;

[0165] Wherein, the second switching condition may specifically include:

[0166] The rank indication reported by the UE is 1, and the downlink channel quality parameters counted by the base station side meet the channel quality conditions for handover; or

[0167] The rank indication reported by the UE is 2, the downlink channel quality parameters counted by the base station meet the channel quality conditions for handover, and the actual downlink throughput of space div...

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Abstract

The invention provides a switching method and a switching system of a transmission mode in a downlink multi-input and multi-output mode. The switching method concretely comprises the following steps of: switching the transmission mode in the downlink multi-input and multi-output mode from transmission diversity to space division multiplexing in a transmission diversity mode when the establishing times of a first switching condition accord with a first threshold value, wherein the first switching condition is as follows: a downlink channel quality parameter counted by a base station side accords with a switched channel quality condition, and the actual downlink throughput of UE (User Equipment) is larger than or equal to the maximum theoretical throughput corresponding to the switched channel quality condition and the current dispatching parameter in the transmission diversity mode. By using the switching method and switching system, the transmission mode in the downlink multi-input and multi-output mode can be automatically switched and higher data transmission speed and larger throughput can be brought.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a method and system for switching transmission modes in a downlink MIMO mode. Background technique [0002] MIMO (Multiple-Input Multiple-output) technology is one of the key technologies adopted by the next generation mobile communication system. For example, an LTE (Long Term Evolution, Long Term Evolution) system uses MIMO technology to increase channel capacity and increase system reliability. [0003] There are two main transmission methods in the downlink MIMO mode - transmit diversity and space division multiplexing. A transmission method is often suitable for a fixed channel scenario; for example, in order to ensure the signal-to-noise ratio and diversity gain of the receiving end, transmit diversity can only send one data stream at the same time, which is suitable for scenarios with weak channel correlation and low signal-to-noise ratio ;Space divi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04W24/00
Inventor 陆松鹤
Owner DATANG MOBILE COMM EQUIP CO LTD
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