SD/FD dispatching method and device

A technology of scheduling cycle and scheduling priority, applied in multi-frequency code system, preventing/detecting errors through diversity reception, etc. The scheduling method cannot be applied to problems such as cellular communication systems to achieve the effect of ensuring fairness and normal communication

Active Publication Date: 2007-12-19
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, because the existing space-frequency scheduling method only considers the spectrum efficiency or total power consumption, but does not take into account the fairness among users, which will make only a few users enjoy the services provided by the network side after the scheduling process is completed, whi

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  • SD/FD dispatching method and device

Examples

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Embodiment 1

[0078] Figure 3 shows the flow chart of the space-frequency scheduling method in Embodiment 1 of the present invention. In this embodiment, the space-frequency scheduling is performed based on the ZFB method, and the space sub-channels in a basic radio resource unit (BRU) are allocated in an evenly distributed manner. Assign, and pre-set the scheduling cycle. Referring to Figure 3, the method includes:

[0079] In step 301, when the scheduling period is reached, the current transmission capability of the receiving end is determined according to the channel information of the receiving end in the BRU and the signal-to-noise ratio measured by the receiving end on the receiving antenna, and the historical average transmission rate of the receiving end is determined.

[0080] Fig. 4 shows a schematic diagram of the relationship among subcarriers, BRUs and spatial subchannels. As shown in Figure 4, in a MIMO OFDM system, a BRU refers to a group of subcarriers in a preset time slot...

Embodiment 2

[0112] In this embodiment, the space-frequency scheduling is performed based on the PARC method, and the space sub-channels are allocated in an even allocation manner during the scheduling process. The flow of the space-frequency scheduling method in FIG. 3 is also applicable to this embodiment, but the specific operation of allocating space sub-channels in step 304 is different from that in Embodiment 1.

[0113] In the PARC method of this embodiment, the allocation of the spatial sub-channels is accomplished by allocating the transmitting antennas of the transmitting end.

[0114] In this embodiment, it is assumed that the number of antennas at the transmitting end is less than the number of antennas at the receiving end.

[0115] FIG. 6 shows a flowchart of a method for allocating spatial sub-channels in this embodiment. Referring to Figure 6, the method includes:

[0116] Step 601: According to the channel information H of the receiving end and the signal-to-noise ratio ...

Embodiment 3

[0134] This embodiment is based on the ZFB method and performs allocation of spatial sub-channels in a non-average manner. In order to ensure the normal implementation of the solution in this embodiment, the number of selected receiving ends and the number of spatial sub-channels are predetermined by the transmitting end.

[0135] Figure 7 shows a flow chart of the space-frequency scheduling method in this embodiment, referring to Figure 7, the method includes:

[0136] In step 701, when the scheduling period arrives, the transmission capability of the receiving end is calculated according to the channel information of the receiving end in the BRU and the signal-to-noise ratio measured by the receiving end on each antenna, and the historical average transmission rate is determined.

[0137] In step 702, the scheduling priority of the receiving end is calculated according to the determined transmission capability and the historical average transmission rate.

[0138] In step 7...

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Abstract

This invention discloses a method for carrying out scheduling of space frequency between an emitting end and a receiving end including: A, computing the dispatch priority of a receiving end utilizing its transmission ability of the current dispatch period and historical mean transmission rate of the receiving end when arriving at the predesigned scheduling period, B, selecting receiving ends from the highest dispatch priority based on numbers of receiving ends selected by the emission end and distributing sub-channel among the selected receiving ends. This invention also discloses a space frequency dispatch device capable of selecting receiving ends based on the dispatch priority of a receiving end and distributing space sub-channels among receiving ends.

Description

technical field [0001] The invention relates to multiple-input multiple-output (MIMO) technology, in particular to a space-frequency scheduling method and a space-frequency scheduling device based on MIMO Orthogonal Frequency Division Multiplexing (OFDM) technology. Background technique [0002] The core idea of ​​MIMO technology is to use multiple antennas to achieve multiple transmissions and multiple receptions, so as to fully exploit space resources. Under narrow-band channel conditions, the channel capacity of the MIMO system is approximately proportional to the minimum number of receiving and transmitting antennas. It can double the channel capacity and spectrum utilization without increasing spectrum resources and antenna transmission power. In a multi-user MIMO system, through space-frequency scheduling, multiple users share the same MIMO channel to realize Space Division Multiple Access (SDMA), which can further increase the total capacity of the system. [0003] O...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/06
Inventor 刘光毅朱剑驰王莹张建华张平王伟华雷春娟
Owner TD TECH COMM TECH LTD
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