[go: up one dir, main page]

CN102143588A - Resource-allocating method for multi-user multi-relay communication system - Google Patents

Resource-allocating method for multi-user multi-relay communication system Download PDF

Info

Publication number
CN102143588A
CN102143588A CN2011100618570A CN201110061857A CN102143588A CN 102143588 A CN102143588 A CN 102143588A CN 2011100618570 A CN2011100618570 A CN 2011100618570A CN 201110061857 A CN201110061857 A CN 201110061857A CN 102143588 A CN102143588 A CN 102143588A
Authority
CN
China
Prior art keywords
user
relay
base station
sub
subcarrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011100618570A
Other languages
Chinese (zh)
Inventor
杨绿溪
吴杨生
余辉
李春国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southeast University
Original Assignee
Southeast University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southeast University filed Critical Southeast University
Priority to CN2011100618570A priority Critical patent/CN102143588A/en
Publication of CN102143588A publication Critical patent/CN102143588A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

The invention relates to the field of wireless communication and discloses a resource-allocating method for a multi-user multi-relay communication system. The resource-allocating method provided by the invention comprises the following steps of: providing a time division duplex downlink multi-user multi-relay system and allowing a base station sending end (base station) to serve multiple mobile user receiving ends (user) through relays. The system comprises K mobile user receiving ends and R relays. The band width of the system is B and a frequency-selective wideband channel is divided into N flat-fading channels by an orthogonal frequency division multiplexing (OFDM) technology. The base station sending end can serve K mobile user receiving ends through N orthogonal subchannels. Compared with the prior art, the invention has the advantages of higher frequency spectrum efficiency and no extra feedback expenditure. Both K and R are natural numbers and B is a positive rational number.

Description

一种多用户多中继通信系统的资源分配方法A resource allocation method for a multi-user multi-relay communication system

技术领域technical field

本发明涉及无线通信领域，特别涉及一种多用户多中继通信系统的资源分配方法。The invention relates to the field of wireless communication, in particular to a resource allocation method of a multi-user multi-relay communication system.

背景技术Background technique

研究表明，基于中继站的无线通信网络结构可以有效地降低路径损耗所造成的功率资源的浪费，提高频谱利用率，并可利用自组织ad hoc网的多跳连通思想提高网络的抗毁性能，所以基于中继站的网络结构以及协作多路技术得到了广泛研究和关注，并在新一代移动通信、无线局域网和宽带无线网络等标准的制定时都考虑了如何引入中继协作处理的问题。Studies have shown that the wireless communication network structure based on relay stations can effectively reduce the waste of power resources caused by path loss, improve spectrum utilization, and use the idea of multi-hop connectivity of self-organizing ad hoc networks to improve network invulnerability. The network structure based on the relay station and the cooperative multiplexing technology have been widely studied and concerned, and the problem of how to introduce the relay cooperative processing has been considered in the formulation of standards such as the new generation of mobile communication, wireless local area network and broadband wireless network.

中继增强型蜂窝系统借助中继辅助通信，改善了小区边缘地区及热点地区的用户通信质量，扩大了小区覆盖面积，同时增加了系统频谱资源利用率，提升了蜂窝通信系统整体性能。然而，由于中继站的增加，传统的小区多用户调度和资源分配算法不再适用，新型算法的设计成为中继增强型蜂窝系统研究的关键问题。The relay-enhanced cellular system uses relay-assisted communication to improve user communication quality in cell edge areas and hotspot areas, expand cell coverage, increase system spectrum resource utilization, and improve the overall performance of the cellular communication system. However, due to the increase of relay stations, the traditional cell multi-user scheduling and resource allocation algorithms are no longer applicable, and the design of new algorithms has become a key issue in the research of relay-enhanced cellular systems.

多用户通信的关键问题是怎样有效的处理用户间的干扰，即如何有效的传送每个用户的数据。正交频分多址接入（OFDMA）是下一代移动通信系统中解决多用户复用的标准技术，通过结合OFDM 调制，OFDMA 将用户数据在频段上区分开来，将宽带信道划分为多个平坦衰落的子信道，在不同子信道上的用户之间理论上就不存在任何的干扰，这样就能有效的收发数据。The key issue of multi-user communication is how to effectively deal with the interference among users, that is, how to effectively transmit the data of each user. Orthogonal Frequency Division Multiple Access (OFDMA) is a standard technology for solving multi-user multiplexing in the next generation mobile communication system. By combining OFDM modulation, OFDMA distinguishes user data in frequency bands and divides broadband channels into multiple In a sub-channel with flat fading, theoretically, there is no interference between users on different sub-channels, so that data can be sent and received effectively.

使用OFDMA 技术的多用户通信技术已较为成熟，已有的长期演进LTE-Advanced 提案中涉及到多用户存在时均考虑了OFDMA 技术，这种将多用户通信化归到单用户通信的方案需要更多的带宽，而设计问题主要集中在上层的子载波分配和物理层的功率分配上，自适应功率资源分配在协作网络中起着重要的作用。The multi-user communication technology using OFDMA technology has been relatively mature. The existing long-term evolution LTE-Advanced proposals have considered OFDMA technology when it comes to the existence of multiple users. This scheme of reducing multi-user communication to single-user communication needs more However, design issues mainly focus on subcarrier allocation in the upper layer and power allocation in the physical layer. Adaptive power resource allocation plays an important role in cooperative networks.

本发明考虑多用户多中继通信系统，联合考虑子载波分配、子载波配对和功率分配等问题，相比已有资源分配算法有了明显增益。The present invention considers a multi-user multi-relay communication system, and jointly considers issues such as subcarrier allocation, subcarrier pairing and power allocation, and has obvious gains compared with existing resource allocation algorithms.

发明内容Contents of the invention

技术问题： 本发明的目的是提供一种多用户多中继通信系统的资源分配方法，使得多用户多中继通信系统获得令人满意的无线通信性能。 Technical problem: The purpose of the present invention is to provide a resource allocation method for a multi-user multi-relay communication system, so that the multi-user multi-relay communication system can obtain satisfactory wireless communication performance.

技术方案： 多用户多中继系统中的资源分配方法包括以下步骤： Technical solution: the resource allocation method in the multi-user multi-relay system includes the following steps:

a. 多用户多中继通信系统由一个基站发送端、                                                

Figure 369996DEST_PATH_IMAGE001
个中继站以及
Figure 745614DEST_PATH_IMAGE002
个移动用户接收端组成，移动用户均为两跳用户，其中
Figure 431810DEST_PATH_IMAGE001
和均为自然数；a. The multi-user multi-relay communication system consists of a base station transmitter,
Figure 369996DEST_PATH_IMAGE001
relay stations and
Figure 745614DEST_PATH_IMAGE002
It is composed of receiving ends of mobile users, and all mobile users are two-hop users, among which
Figure 431810DEST_PATH_IMAGE001
and are natural numbers;

b. 基站发送端通过个中继站服务

Figure 549917DEST_PATH_IMAGE002
个移动用户接收端，获取两跳链路的下行信道信息CSI，并利用现有的子载波分配算法将第二跳链路的子载波分配给
Figure 711908DEST_PATH_IMAGE002
个移动用户接收端；b. The transmitter of the base station passes relay service
Figure 549917DEST_PATH_IMAGE002
A mobile user receiving end obtains the downlink channel information CSI of the two-hop link, and uses the existing subcarrier allocation algorithm to allocate the subcarriers of the second hop link to
Figure 711908DEST_PATH_IMAGE002
a mobile user receiving terminal;

c. 基站发送端根据第二跳链路的子载波分配情况和第一跳链路信道状态信息，利用子载波配对技术将第一跳链路的子载波分配给

Figure 38984DEST_PATH_IMAGE001
个中继站；c. The sending end of the base station allocates the subcarriers of the first hop link to
Figure 38984DEST_PATH_IMAGE001
a relay station;

d. 在总功率约束下，基站发送端根据两跳链路的子载波分配情况和信道状态信息，为两跳链路的子载波分配发射功率；d. Under the total power constraint, the transmitter of the base station allocates transmit power for the subcarriers of the two-hop link according to the subcarrier allocation of the two-hop link and the channel state information;

e. 第一时隙，基站发送端根据预先分配的子载波和发射功率，发送移动用户的信息给相应的中继站；e. In the first time slot, the base station sender sends the information of the mobile user to the corresponding relay station according to the pre-allocated subcarrier and transmit power;

f. 第二时隙，各中继站接收基站发送端发送的信号，并根据第二跳链路的子载波分配情况，解码转发移动用户的信号；f. In the second time slot, each relay station receives the signal sent by the base station transmitter, and decodes and forwards the signal of the mobile user according to the subcarrier allocation of the second hop link;

g. 移动用户接收中继站转发的信号，解码并进行相应的处理。g. The mobile user receives the signal forwarded by the relay station, decodes it and performs corresponding processing.

所述中继站为解码转发中继站；所述两跳用户的两跳链路均采用OFDM技术。The relay station is a decoding and forwarding relay station; the two-hop links of the two-hop users adopt OFDM technology.

所述子载波分配算法是以系统容量最大化为目标的算法。The subcarrier allocation algorithm is an algorithm aiming at maximizing system capacity.

所述子载波配对技术为分别对两跳链路的子载波信道增益进行降序排列，然后逐个配对。The subcarrier pairing technique is to arrange the subcarrier channel gains of the two-hop links in descending order, and then pair them one by one.

所述的分配发射功率是：采用注水算法为分配给各个用户的配对的子载波对进行功率分配,子载波对的功率分配，如下式The described transmission power allocation is: adopting the water injection algorithm to allocate power to the paired sub-carrier pairs assigned to each user, and the power allocation of the sub-carrier pairs is as follows

Figure 261018DEST_PATH_IMAGE003
其中
Figure 407966DEST_PATH_IMAGE004
为第n个子载波对的等效信道增益与接收端噪声的比值，上式的解为：
Figure 373648DEST_PATH_IMAGE005
，其中
Figure 492914DEST_PATH_IMAGE006
的取值需满足总功率约束条件；P T 为总的发送功率。
Figure 261018DEST_PATH_IMAGE003
in
Figure 407966DEST_PATH_IMAGE004
is the ratio of the equivalent channel gain of the nth subcarrier pair to the noise at the receiver, the solution of the above formula is:
Figure 373648DEST_PATH_IMAGE005
,in
Figure 492914DEST_PATH_IMAGE006
The value of is required to meet the total power constraints; PT is the total transmit power.

再根据两跳信道条件分别为两跳链路上的子载波分配发送功率，表达式如下：Then according to the channel conditions of the two hops, the transmit power is allocated to the subcarriers on the two-hop link respectively, the expression is as follows:

Figure 948166DEST_PATH_IMAGE007
Figure 948166DEST_PATH_IMAGE007

Figure 785672DEST_PATH_IMAGE008
Figure 785672DEST_PATH_IMAGE008

其中

Figure 351782DEST_PATH_IMAGE009
是基站发送端在子载波m上的发送功率，
Figure 325555DEST_PATH_IMAGE010
中继站r在子载波n上的发送功率，
Figure 951708DEST_PATH_IMAGE011
为分配给第k个用户子载波对
Figure 25579DEST_PATH_IMAGE012
的总功率，
Figure 395381DEST_PATH_IMAGE013
为中继站r到第k个用户在子信道n上的信噪比，
Figure 489239DEST_PATH_IMAGE014
为基站发送端到中继站r在子信道m上的信噪比。in
Figure 351782DEST_PATH_IMAGE009
is the transmit power of the base station transmitter on the subcarrier m,
Figure 325555DEST_PATH_IMAGE010
The transmit power of relay station r on subcarrier n,
Figure 951708DEST_PATH_IMAGE011
is assigned to the kth user subcarrier pair
Figure 25579DEST_PATH_IMAGE012
the total power of
Figure 395381DEST_PATH_IMAGE013
is the signal-to-noise ratio from the relay station r to the kth user on the subchannel n,
Figure 489239DEST_PATH_IMAGE014
is the signal-to-noise ratio from the transmitter of the base station to the relay station r on the sub-channel m.

有益效果：两跳链路各子载波上的信道状态信息（CSI）可以通过直接信道估计（TDD系统）得到。本发明与现有技术相比具有更高的频谱效率，并且不增加额外的反馈开销。 Beneficial effect: the channel state information (CSI) on each subcarrier of the two-hop link can be obtained through direct channel estimation (TDD system). Compared with the prior art, the present invention has higher spectral efficiency and does not increase additional feedback overhead.

附图说明Description of drawings

图1 是多用户多中继通信系统模型，Figure 1 is a multi-user multi-relay communication system model,

图2 是多用户多中继通信系统频谱效率与信噪比的关系曲线，Figure 2 is the relationship curve between spectrum efficiency and signal-to-noise ratio of a multi-user multi-relay communication system,

图3 是信噪比SNR=20dB时系统频谱效率的累积分布函数(CDF)。Figure 3 is the cumulative distribution function (CDF) of the system spectral efficiency when the signal-to-noise ratio SNR=20dB.

具体实施方式Detailed ways

本发明的实施方式公开了一种多用户多中继通信系统的资源分配方法，包含以下步骤：考虑一个时分双工的多用户多中继下行链路通信系统，一个基站发送端通过中继站与

Figure 286293DEST_PATH_IMAGE002
个移动用户接收端进行通信。假设系统有
Figure 832812DEST_PATH_IMAGE002
个移动用户接收端，
Figure 678409DEST_PATH_IMAGE001
个中继站，其中
Figure 689090DEST_PATH_IMAGE002
和
Figure 594729DEST_PATH_IMAGE001
均为自然数。系统带宽为
Figure 690861DEST_PATH_IMAGE015
，将被分成
Figure 340148DEST_PATH_IMAGE016
个OFDM子载波，其中
Figure 470915DEST_PATH_IMAGE015
为有理数，
Figure 547456DEST_PATH_IMAGE016
为自然数。基站发送端（基站）需要通过
Figure 865305DEST_PATH_IMAGE016
个正交的子信道发送
Figure 318283DEST_PATH_IMAGE016
个数据流给
Figure 303556DEST_PATH_IMAGE002
个移动用户接收端。每次调度一个子载波只能分配给一个移动用户接收端（第二时隙）和一个中继站（第一时隙），中继站从一个子载波接收的数据也只能通过此中继站的一个子载波解码转发出去。假定系统总的发送功率一定。
Figure 548068DEST_PATH_IMAGE017
表示移动用户接收端集合，
Figure 353213DEST_PATH_IMAGE018
表示中继站集合，
Figure 344303DEST_PATH_IMAGE019
表示正交子信道的集合。对于每个慢衰落的子信道，信道估计是可行的，这里可以假设基站发送端已知全部信道信息，并设定系统是半双工的，因此，基站发送端与移动用户接收端之间的通信需要两个时隙。The embodiment of the present invention discloses a resource allocation method for a multi-user multi-relay communication system, which includes the following steps: Considering a time-division duplex multi-user multi-relay downlink communication system, a base station sending end communicates with a relay station
Figure 286293DEST_PATH_IMAGE002
Communication with mobile user receivers. Suppose the system has
Figure 832812DEST_PATH_IMAGE002
a mobile user receiving end,
Figure 678409DEST_PATH_IMAGE001
relay stations, of which
Figure 689090DEST_PATH_IMAGE002
and
Figure 594729DEST_PATH_IMAGE001
are all natural numbers. The system bandwidth is
Figure 690861DEST_PATH_IMAGE015
, will be divided into
Figure 340148DEST_PATH_IMAGE016
OFDM subcarriers, where
Figure 470915DEST_PATH_IMAGE015
is a rational number,
Figure 547456DEST_PATH_IMAGE016
is a natural number. The base station transmitter (base station) needs to pass
Figure 865305DEST_PATH_IMAGE016
Orthogonal sub-channels send
Figure 318283DEST_PATH_IMAGE016
data stream to
Figure 303556DEST_PATH_IMAGE002
mobile user receivers. Each time a subcarrier is scheduled, it can only be allocated to one mobile user receiving end (the second time slot) and one relay station (the first time slot). The data received by the relay station from one subcarrier can only be decoded by one subcarrier of the relay station. Forward it. It is assumed that the total transmission power of the system is constant.
Figure 548068DEST_PATH_IMAGE017
Represents the set of receivers of mobile users,
Figure 353213DEST_PATH_IMAGE018
represents the set of relay stations,
Figure 344303DEST_PATH_IMAGE019
Represents a set of orthogonal subchannels. For each slow fading sub-channel, channel estimation is feasible. Here, it can be assumed that the base station transmitter knows all channel information, and the system is set to be half-duplex. Therefore, the distance between the base station transmitter and the mobile user receiver Communication requires two time slots.

假设基站发送端通过子载波m传送数据给中继站r，中继站r再通过子载波n解码转发数据给移动用户接收端k,,

Figure 602426DEST_PATH_IMAGE021
,
Figure 98129DEST_PATH_IMAGE012
是分给移动用户接收端k的子载波对。
Figure 689648DEST_PATH_IMAGE009
是基站发送端在子载波m上的发送功率，
Figure 587197DEST_PATH_IMAGE010
中继站r在子载波n上的发送功率。分配给子载波对
Figure 238758DEST_PATH_IMAGE012
的总功率为
Figure 956178DEST_PATH_IMAGE011
。假设中继站和移动用户接收端的加性高斯白噪声的单边功率谱密度都是，
Figure 103443DEST_PATH_IMAGE023
和
Figure 925905DEST_PATH_IMAGE024
分别表示第一跳信道在子载波m上的信道增益和第二跳信道在子载波n上的信道增益。于是给出信噪比的定义为：
Figure 130621DEST_PATH_IMAGE025
，
Figure 270134DEST_PATH_IMAGE026
。可以导出这两个时隙的瞬时容量：Suppose the base station transmits data to the relay station r through the subcarrier m, and the relay station r decodes and forwards the data to the mobile user receiving terminal k through the subcarrier n. ,
Figure 602426DEST_PATH_IMAGE021
,
Figure 98129DEST_PATH_IMAGE012
is the subcarrier pair assigned to mobile user receiving terminal k.
Figure 689648DEST_PATH_IMAGE009
is the transmit power of the base station transmitter on the subcarrier m,
Figure 587197DEST_PATH_IMAGE010
Transmit power of relay station r on subcarrier n. Assigned to subcarrier pairs
Figure 238758DEST_PATH_IMAGE012
The total power of
Figure 956178DEST_PATH_IMAGE011
. Assume that the one-sided power spectral densities of the additive white Gaussian noise at the receiving end of the relay station and the mobile user are both ,
Figure 103443DEST_PATH_IMAGE023
and
Figure 925905DEST_PATH_IMAGE024
Denote the channel gain of the first hop channel on subcarrier m and the channel gain of the second hop channel on subcarrier n, respectively. Then the signal-to-noise ratio is defined as:
Figure 130621DEST_PATH_IMAGE025
,
Figure 270134DEST_PATH_IMAGE026
. The instantaneous capacity of these two slots can be derived:

Figure 939013DEST_PATH_IMAGE027
Figure 939013DEST_PATH_IMAGE027

和and

则基站发送端通过子信道对

Figure 624389DEST_PATH_IMAGE012
到移动用户接收端k的容量可以表示为：Then the transmitter of the base station passes the subchannel pair
Figure 624389DEST_PATH_IMAGE012
The capacity to the mobile user receiving end k can be expressed as:

Figure 564664DEST_PATH_IMAGE029
Figure 564664DEST_PATH_IMAGE029

下面将以系统容量最大化为目标进行资源分配，此时，可以将问题定义为：The resource allocation will be carried out with the goal of maximizing the system capacity. At this time, the problem can be defined as:

Figure 88049DEST_PATH_IMAGE030
Figure 88049DEST_PATH_IMAGE030

其中

Figure 189997DEST_PATH_IMAGE031
是指分配给移动用户接收端k的子载波对的集合，
Figure 369306DEST_PATH_IMAGE032
是总的系统发送功率。in
Figure 189997DEST_PATH_IMAGE031
refers to the set of subcarrier pairs allocated to mobile user receiving end k,
Figure 369306DEST_PATH_IMAGE032
is the total system transmit power.

在总功率约束下，要使得

Figure 910008DEST_PATH_IMAGE033
最大，必然有
Figure 225583DEST_PATH_IMAGE034
。因此有Under the total power constraint, to make
Figure 910008DEST_PATH_IMAGE033
the largest, there must be
Figure 225583DEST_PATH_IMAGE034
. Therefore there are

Figure 826329DEST_PATH_IMAGE007
Figure 826329DEST_PATH_IMAGE007

Figure 227354DEST_PATH_IMAGE008
Figure 227354DEST_PATH_IMAGE008

则

Figure 571748DEST_PATH_IMAGE033
的最大值可以表示为：but
Figure 571748DEST_PATH_IMAGE033
The maximum value of can be expressed as:

Figure 741829DEST_PATH_IMAGE035
Figure 741829DEST_PATH_IMAGE035

于是问题可以重新定义为：So the problem can be redefined as:

Figure 513476DEST_PATH_IMAGE036
Figure 513476DEST_PATH_IMAGE036

针对上述问题，本发明给出以下具体实施步骤：For the problems referred to above, the present invention provides the following specific implementation steps:

1.   多用户多中继通信系统由一个基站发送端、

Figure 398868DEST_PATH_IMAGE001
个中继站以及
Figure 219057DEST_PATH_IMAGE002
个移动用户接收端组成，移动用户均为两跳用户，其中
Figure 571541DEST_PATH_IMAGE001
和
Figure 451772DEST_PATH_IMAGE002
均为自然数；1. The multi-user multi-relay communication system consists of a base station transmitter,
Figure 398868DEST_PATH_IMAGE001
relay stations and
Figure 219057DEST_PATH_IMAGE002
It is composed of receiving ends of mobile users, and all mobile users are two-hop users, among which
Figure 571541DEST_PATH_IMAGE001
and
Figure 451772DEST_PATH_IMAGE002
are natural numbers;

2.   两跳链路各子载波上的信道状态信息（CSI）均可以通过直接信道估计（TDD系统）得到；2. The channel state information (CSI) on each subcarrier of the two-hop link can be obtained through direct channel estimation (TDD system);

3.   根据所得的第二跳链路的各个子信道的信道增益，将第二时隙的每个子载波分配给在此子载波上信道增益最好的移动用户接收端，3. According to the obtained channel gain of each sub-channel of the second hop link, assign each sub-carrier of the second time slot to the mobile user receiving terminal with the best channel gain on this sub-carrier,

4.   在第二时隙的子载波已经分配好的情况下，进行子载波配对。应用比较排序法对两跳链路的子载波进行排序，然后逐一配对，4. When the subcarriers of the second time slot have been allocated, perform subcarrier pairing. The subcarriers of the two-hop link are sorted by using the comparison sorting method, and then paired one by one,

5.   经过子载波分配和子载波配对后，对子载波对进行功率分配，如下式：5. After subcarrier allocation and subcarrier pairing, power allocation is performed on subcarrier pairs, as follows:

Figure 889706DEST_PATH_IMAGE003
    其中，
Figure 513586DEST_PATH_IMAGE004
为第n个子载波对的等效信道增益与接收端噪声的比值，是总的系统发送功率，上式的解为
Figure 771709DEST_PATH_IMAGE005
。获得各个子载波对的功率后，再根据式
Figure 634623DEST_PATH_IMAGE007
和式
Figure 858931DEST_PATH_IMAGE008
对两跳链路上的子载波进行功率分配，
Figure 889706DEST_PATH_IMAGE003
in,
Figure 513586DEST_PATH_IMAGE004
is the ratio of the equivalent channel gain of the nth subcarrier pair to the noise at the receiver, is the total system transmission power, the solution of the above formula is
Figure 771709DEST_PATH_IMAGE005
. After obtaining the power of each subcarrier pair, according to the formula
Figure 634623DEST_PATH_IMAGE007
Japanese style
Figure 858931DEST_PATH_IMAGE008
Power allocation is performed on the subcarriers on the two-hop link,

6.   基站发送端首先依据预先分配好的资源信息向

Figure 123690DEST_PATH_IMAGE002
个移动用户接收端传输数据，再经过中继站的解码转发，最后移动用户接收端在为其分配的子信道上接收数据。6. The sending end of the base station sends the
Figure 123690DEST_PATH_IMAGE002
The receiving end of each mobile user transmits data, and then decodes and forwards through the relay station, and finally the receiving end of the mobile user receives the data on the sub-channel allocated to it.

图2比较了本发明算法与现有文献（G. Liu ,H. Liu.On the capacity of broadband relay networks[C].in Proc. IEEE ACSSC’2004, Pacific Grove, USA, 2004:1318–1322）在不同信噪比下的频谱效率，图3为两种算法的频谱效率的累计概率分布曲线，可以看出，本发明算法性能远优于现有算法。Figure 2 compares the algorithm of the present invention with the existing literature (G. Liu , H. Liu. On the capacity of broadband relay networks[C].in Proc. IEEE ACSSC'2004, Pacific Grove, USA, 2004:1318-1322) Spectrum efficiency under different signal-to-noise ratios. Figure 3 shows the cumulative probability distribution curves of the spectrum efficiency of the two algorithms. It can be seen that the performance of the algorithm of the present invention is far superior to that of the existing algorithms.

Claims (5)

1. A method for resource allocation in a multi-user multi-relay communication system, the method comprising the steps of:
a. the multi-user multi-relay communication system comprises a base station sending end,
Figure 608538DEST_PATH_IMAGE001
A relay station and
Figure 436817DEST_PATH_IMAGE002
a mobile user receiving end, the mobile users are all two-hop users, wherein
Figure 171555DEST_PATH_IMAGE001
And
Figure 718074DEST_PATH_IMAGE002
are all natural numbers;
b. base station transmit end pass
Figure 891566DEST_PATH_IMAGE001
A relay station service
Figure 831142DEST_PATH_IMAGE002
The mobile user receiving end acquires the downlink channel information CSI of the two-hop link and distributes the sub-carriers of the second-hop link to the sub-carriers of the second-hop link by utilizing the existing sub-carrier distribution algorithm
Figure 799098DEST_PATH_IMAGE002
A mobile user receiving end;
c. the base station sending end distributes the sub-carrier of the first hop link to the sub-carrier of the second hop link by using the sub-carrier matching technology according to the sub-carrier distribution condition of the second hop link and the channel state information of the first hop link
Figure 832913DEST_PATH_IMAGE001
A plurality of relay stations;
d. under the constraint of total power, a base station sending end distributes transmitting power for subcarriers of a two-hop link according to subcarrier distribution conditions and channel state information of the two-hop link;
e. in the first time slot, a base station sending end sends information of a mobile user to a corresponding relay station according to pre-allocated subcarriers and transmitting power;
f. in the second time slot, each relay station receives the signal sent by the sending end of the base station and decodes and forwards the signal of the mobile user according to the subcarrier distribution condition of the second hop link;
g. and the mobile user receives the signal forwarded by the relay station, decodes the signal and performs corresponding processing.
2. The method for resource allocation in a multi-user multi-relay communication system according to claim 1,
the relay station is a decoding forwarding relay station; and the two-hop link of the two-hop user adopts the OFDM technology.
3. The method for resource allocation in a multi-user multi-relay communication system according to claim 1,
the subcarrier allocation algorithm is an algorithm targeted at maximizing system capacity.
4. The method for resource allocation in a multi-user multi-relay communication system according to claim 1,
the subcarrier pairing technology is that subcarrier channel gains of two-hop links are respectively arranged in a descending order and then paired one by one.
5. The method for resource allocation in a multi-user multi-relay communication system according to claim 1,
the allocated transmission power is: performing power allocation for the paired sub-carrier pairs allocated to each user by using a water filling algorithm, wherein the power allocation of the sub-carrier pairs is as follows
Wherein
Figure 347388DEST_PATH_IMAGE004
The ratio of the equivalent channel gain of the nth subcarrier pair to the noise at the receiving end is defined as:
Figure 486245DEST_PATH_IMAGE005
wherein
Figure 7356DEST_PATH_IMAGE006
The value of (a) needs to satisfy a total power constraint condition;P T is the total transmit power.
And respectively distributing the sending power for the sub-carriers on the two-hop link according to the two-hop channel condition, wherein the expression is as follows:
Figure 257072DEST_PATH_IMAGE007
Figure 180029DEST_PATH_IMAGE008
wherein
Figure 427470DEST_PATH_IMAGE009
Is the transmit power of the base station transmitter on subcarrier m,
Figure 498195DEST_PATH_IMAGE010
the transmit power of relay station r on subcarrier n,
Figure 489284DEST_PATH_IMAGE011
for allocation to the kth user sub-carrier pair
Figure 329064DEST_PATH_IMAGE012
The total power of the power converter,the signal-to-noise ratio on subchannel n for relay r to the k-th user,
Figure 39848DEST_PATH_IMAGE014
the signal-to-noise ratio on the subchannel m from the sending end of the base station to the relay station r.
CN2011100618570A 2011-03-15 2011-03-15 Resource-allocating method for multi-user multi-relay communication system Pending CN102143588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100618570A CN102143588A (en) 2011-03-15 2011-03-15 Resource-allocating method for multi-user multi-relay communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100618570A CN102143588A (en) 2011-03-15 2011-03-15 Resource-allocating method for multi-user multi-relay communication system

Publications (1)

Publication Number Publication Date
CN102143588A true CN102143588A (en) 2011-08-03

Family

ID=44410735

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011100618570A Pending CN102143588A (en) 2011-03-15 2011-03-15 Resource-allocating method for multi-user multi-relay communication system

Country Status (1)

Country Link
CN (1) CN102143588A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102333062A (en) * 2011-10-18 2012-01-25 清华大学 OFDM Two-way Information Mutual Transmission Method Oriented to User Fairness
WO2012155491A1 (en) * 2011-08-08 2012-11-22 中兴通讯股份有限公司 Method, device and base station for controlling configuration of channel resources
CN103068027A (en) * 2012-12-07 2013-04-24 南京邮电大学 Optimal power distribution method of multiple relays in frequency flat fading channel
CN103138895A (en) * 2011-12-02 2013-06-05 联发科技（新加坡）私人有限公司 Wireless communication system and method for performing operation of the same
CN106357376A (en) * 2016-08-29 2017-01-25 东南大学 ARQ feedback based resource allocation scheme for relay cooperative underwater acoustic communication system
WO2017148448A1 (en) * 2016-03-04 2017-09-08 海能达通信股份有限公司 Power control method and node device
CN109450513A (en) * 2018-10-17 2019-03-08 扬州大学 The more relay system transmission methods of cooperation based on non-orthogonal multiple access technology
WO2019206080A1 (en) * 2018-04-26 2019-10-31 华为技术有限公司 Channel resource coordination and allocation method and apparatus
CN111132189A (en) * 2019-10-31 2020-05-08 广西华南通信股份有限公司 Three-step multi-carrier wireless forwarding station resource optimization configuration strategy

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
张冬梅等: "OFDMA系统中线性注水功率分配算法", 《电子与信息学报》 *
张欢等: "多跳中继系统中子载波与功率的分配", 《系统仿真学报》 *
李汀等: "一种多用户中继MIMO通信系统迭代预编码方案", 《电子与信息学报》 *
王春晖等: "两跳中继系统中调度算法的改进及性能比较", 《计算机应用研究》 *
王蕾蕾: "协作中继通信系统中的功率分配方案仿真研究", 《信息科技辑》 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012155491A1 (en) * 2011-08-08 2012-11-22 中兴通讯股份有限公司 Method, device and base station for controlling configuration of channel resources
CN102333062B (en) * 2011-10-18 2014-04-02 清华大学 OFDM (Orthogonal Frequency Division Multiplex) bidirectional information interactive transmission method oriented to user fairness
CN102333062A (en) * 2011-10-18 2012-01-25 清华大学 OFDM Two-way Information Mutual Transmission Method Oriented to User Fairness
CN103138895A (en) * 2011-12-02 2013-06-05 联发科技（新加坡）私人有限公司 Wireless communication system and method for performing operation of the same
US9521622B2 (en) 2011-12-02 2016-12-13 Mediatek Singapore Pte. Ltd. Non-codebook based precoding for multi-user MIMO downlink
CN103138895B (en) * 2011-12-02 2016-12-21 联发科技（新加坡）私人有限公司 Wireless communication system and the method performing wireless communication system operation
CN103068027A (en) * 2012-12-07 2013-04-24 南京邮电大学 Optimal power distribution method of multiple relays in frequency flat fading channel
CN103068027B (en) * 2012-12-07 2015-04-01 南京邮电大学 Optimal power distribution method of multiple relays in frequency flat fading channel
CN107155210A (en) * 2016-03-04 2017-09-12 海能达通信股份有限公司 Poewr control method and node apparatus
WO2017148448A1 (en) * 2016-03-04 2017-09-08 海能达通信股份有限公司 Power control method and node device
CN106357376A (en) * 2016-08-29 2017-01-25 东南大学 ARQ feedback based resource allocation scheme for relay cooperative underwater acoustic communication system
CN106357376B (en) * 2016-08-29 2019-08-13 东南大学 Resource allocation methods of the relay cooperative underwater sound communication system based on ARQ feedback
WO2019206080A1 (en) * 2018-04-26 2019-10-31 华为技术有限公司 Channel resource coordination and allocation method and apparatus
CN109450513A (en) * 2018-10-17 2019-03-08 扬州大学 The more relay system transmission methods of cooperation based on non-orthogonal multiple access technology
CN111132189A (en) * 2019-10-31 2020-05-08 广西华南通信股份有限公司 Three-step multi-carrier wireless forwarding station resource optimization configuration strategy
CN111132189B (en) * 2019-10-31 2022-07-29 广西华南通信股份有限公司 Three-step multi-carrier wireless forwarding station resource optimal configuration method

Similar Documents

Publication Publication Date Title
CN102143588A (en) Resource-allocating method for multi-user multi-relay communication system
EP2465281B1 (en) Communication system, communication apparatus, communication method and computer program product
KR101175483B1 (en) System level architectures for relayed uplink communication
Hua et al. Resource allocation in multi-cell OFDMA-based relay networks
CN104301984B (en) Poewr control method based on time domain half-duplex relay in D2D cellular networks
Zhang et al. Joint subcarrier and power allocation for cooperative communications in LTE-advanced networks
KR20060038131A (en) Uplink Scheduling Method in a Communication System Using a FH-OPEM Method
CN101697637A (en) Resource allocation method in OFDMA system
Arachchillage et al. Recent advances and future research challenges in non-orthogonal multiple access for 5G networks
Marcano et al. A novel method for improving the capacity in 5G mobile networks combining NOMA and OMA
JP2010171979A (en) Method for allocating resources to set of mobile stations communicating with base station over orthogonal frequency division multiple access and time division multiple access networks
CN102833866B (en) Resource allocation method for cooperation relay orthogonal frequency division multiple access system
Li et al. Dynamic subchannel and power allocation in OFDMA-based DF cooperative relay networks
Zhou et al. Optimal asymmetric resource allocation and analysis for OFDM-based multidestination relay systems in the downlink
Li et al. Fairness-aware resource allocation in OFDMA cooperative relaying network
CN102202413A (en) Method for dispatching resources by combining network coding and user pairing
Pan et al. Resource allocation techniques for OFDMA-Based decode-and-forward relaying networks
CN103281695B (en) A kind of hop relay network frequency spectrum planing method
CN102752256B (en) Multi-user cooperative OFDM system resource allocation method and system
CN110830407B (en) Wireless energy-carrying communication method based on OFDM decoding and forwarding cooperative relay system
Li et al. Dynamic resource allocation in OFDMA-based DF cooperative relay networks
Arora et al. Performance enhancement of wireless network by adopting downlink non-orthogonal multiple access technique
Tang et al. Dynamic resource allocation with threshold in OFDMA-based relay networks
Rasouli Cooperative Subcarrier and Power Allocation in OFDM Based Relaying Systems
CN1968042B (en) Uplink sub-macro method used for multiantenna, orthogonal frequency division multiple access cellular system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20110803