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Method and device for allocating wireless resources of single carrier orthogonal frequency division multiplexing system

A wireless resource and orthogonal frequency division technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve problems such as system overhead and high complexity, achieve reduced implementation complexity, low system overhead, and improved utilization efficiency effect

Inactive Publication Date: 2014-07-02
深圳市恒程汇文化科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to improve the utilization rate of the system, Verdu et al. proposed a water injection method that uses channel information to dynamically allocate subcarriers and carrier transmission power (IEEE Trans. Information Theory, 39(3): 773-785, May 1993.R.S.Cheng and S. Verd′u.Gaussian multiaccess channels with ISI: Capacity region and multiuser water-filling), this method can theoretically reach the Shannon limit of channel capacity; but this method needs to traverse all the allocation schemes supported by the system, and then Each traversed possible allocation method recalculates the user sub-channel index, and then performs multiple iterations. The overhead and complexity of the system are extremely high, so there is only theoretical value.

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  • Method and device for allocating wireless resources of single carrier orthogonal frequency division multiplexing system
  • Method and device for allocating wireless resources of single carrier orthogonal frequency division multiplexing system
  • Method and device for allocating wireless resources of single carrier orthogonal frequency division multiplexing system

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Embodiment Construction

[0050] In the present invention, the wireless resource block is allocated according to the allocation priority determined by the bandwidth demand of the user in each time slot and the real-time user sub-channel state index, which can dynamically and adaptively adjust each time slot. Advantages of wireless resources occupied by users. The sub-channel state index of the user is approximated by the channel state index of the radio resource block in the center of the continuous radio resource block (called a radio resource block group) of the user. This can improve the total data throughput rate of the system as much as possible while reducing the complexity of implementation.

[0051] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0052] Such as figure 2 As shown, the method of the embodiment of the present invention executes the following steps in each time slot:

[0053] Step 201: Obtain and sort the channel state ...

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Abstract

The invention discloses a method for allocating wireless resources of a single carrier orthogonal frequency division multiplexing system. The method is carried out in each time slot and comprises the following steps of: acquiring a channel state index of each user on each wireless resource block of each time slot and sorting to obtain the superior-inferior sequence of channel indexes each resource block of each user; determining the allocation priority according to the bandwidth requirement of the user on the current time slot; allocating wireless resource blocks in the system to each user according to the sequence from high to low of the allocation priority and the principle; and allocating the optimal set of channel indexes of a central wireless resource block selected from allocable wireless resource blocks meeting the bandwidth requirement of the user to the user. The invention also discloses a device for allocating the wireless resources of the single carrier orthogonal frequency division multiplexing system. The invention can dynamically and self-adaptively adjust the wireless resources occupied by each user on each time slot, improve the throughout rate of total data of the system as much as possible and simultaneously reduce the complexity for realization.

Description

Technical field [0001] The present invention relates to an orthogonal frequency division multiplexing system, in particular to a method and device for wireless resource allocation in a single carrier orthogonal frequency division multiplexing system. Background technique [0002] Orthogonal frequency division multiplexing (OFDM) technology is a multi-carrier modulation technology that divides the wireless spectrum into several orthogonal sub-carriers, and at the same time converts the user's high-speed data signal stream into several low-speed sub-data streams through serial and parallel And modulate to each sub-carrier for transmission. Due to the orthogonality of the sub-carriers, mutual interference (ICI) can be greatly reduced, and the utilization rate of the wireless spectrum can be improved. The single-carrier orthogonal frequency division multiplexing technology (SC-FDMA) developed on the basis of orthogonal frequency division multiplexing technology has the advantage of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/20H04W28/24H04W72/10H04W72/12
Inventor 朱昀王曼
Owner 深圳市恒程汇文化科技有限公司
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