CN101527936B - Layering isomeric wireless access network system and realization method for layering isomeric wireless access network - Google Patents

Abstract

The invention discloses a layered heterogeneous wireless access network system and a method for realizing the layered heterogeneous wireless access network. The system includes: a first wireless node layer using paired frequency spectrum, and the first wireless node layer includes a or a plurality of first wireless nodes using paired spectrum, a layer of second wireless nodes using unpaired spectrum, the second layer of wireless nodes including a plurality of second wireless nodes using unpaired spectrum; resource management and duplex control A unit for managing and allocating paired spectrum and non-paired spectrum, and controlling communication between the first and second wireless nodes and the wireless terminal in a hybrid duplex mode in which business and control are separated; an inter-node scheduling control unit, It is used to perform inter-node scheduling on wireless terminals; the baseband processing unit is used to perform baseband processing on signals from and/or sent to the first wireless node and/or the second wireless node; the wireless terminal works on the first and second on the spectrum used by wireless nodes.

Description

Hierarchical heterogeneous wireless access network system and implementation method of hierarchical heterogeneous radio access network

technical field

The present invention relates to the field of wireless communication, in particular to a layered heterogeneous wireless access network and a method for realizing the layered heterogeneous wireless access network. the

Background technique

In order to improve the service capability of the network and use the frequency spectrum reasonably, the hierarchical mobile communication access network architecture is being applied more and more widely. The collaboration between the third generation mobile communication system and the wireless local area network is an application example of the layered wireless access network architecture. At present, the layered wireless access network, as a candidate architecture of the IMT-Advanced system, is widely used in related research fields. attention and research. the

Make wireless access points (or base stations) working in lower frequency bands (for example, lower than 3GHz) undertake large-area coverage and provide services to high-speed mobile terminals, and make wireless access points (or base stations) working in higher frequency bands (for example, higher than 3GHz) The entry point undertakes small area coverage and provides services to low-speed or quasi-static terminals. It is a traditional consideration for the hierarchical wireless access network architecture, which involves introducing interlayer handover technology in the hierarchical wireless access network architecture. the

In order to further improve the spectrum efficiency of the layered radio access network, diversity transmission and diversity reception technologies based on the architecture of the layered radio access network have been produced. the

For example, U.S. Patent Application No. US5,546,443 discloses "A Hierarchical Wireless Access System and Working Method", which includes macro cells and micro cells. All micro cells and macro cells share the control channel, which is used to transmit access request information, paging information, mobile station and base station location information, etc. Further, the micro cell also has a shared common control channel independent of the hierarchical structure. The working method of the system is: a service requesting access to a macro cell is not only accessed to the macro cell, but also to a micro cell belonging to the macro cell, and the macro cell and the micro cell are used to implement the service. The macro-diversity of the control channel and the macro-diversity of the traffic channel linked by the item. the

Although the above-mentioned transmit diversity and receive diversity technologies can improve the spectral efficiency of the system in a light-load state, even in principle, this technology can comprehensively use the spectrum resources of the macro cell and the spectrum resources of the micro cell to jointly support high-speed mobile terminals. However, this The inventor of the application found that this technology has at least the following disadvantages: it affects the frequency reuse mode of the cellular system, generates additional inter-cell interference, and has low comprehensive spectrum efficiency in point-to-point services. the

In order to reduce the complexity of mobile management when micro cells support mobile terminals, the patent application No. CN02814129.6 entitled "Hierarchical Cellular Radio Communication System" provides a solution, which includes an umbrella macro cell and A plurality of micro cells covered by the macro cell, each macro cell and micro cell includes a controlling master station. A secondary station (terminal) has a communication channel for communicating with the system, which is divided into a control subchannel for transmitting control information and a data subchannel for transmitting user data. The control sub-channel connects the secondary stations (terminals) to the primary station serving the macrocell, while the data subchannel connects the secondary station (terminal) to the primary station serving the microcell. The control part of the channel is mainly served by umbrella macro cells, thereby reducing frequent mobility management overhead, while the data part is mainly served by micro cells capable of supporting high data rates and large data densities. the

The inventors of the present application found that the above method has at least the following disadvantages: the use of the control channel is not improved from the level of evolution of the more basic duplex mode, and the overall performance of the hierarchical radio access network is not greatly improved. the

In order to realize the ability to support asymmetric services under the layered architecture, the methods for complementing each other between the TDD system and the FDD system under the existing layered architecture include:

U.S. Patent Application No. US20050174954 entitled "Method of operating a TDD/virtual FDD hierarchical cellular telecommunications system (Method of operating a TDD/virtual FDD hierarchical cellular telecommunications system)", in the case where the TDD system is covered by the FDD system , borrow the remaining part of the FDD uplink spectrum as the uplink channel of the terminal FDD working mode, and use the TDD spectrum as the downlink channel of the terminal FDD working mode, thus forming a "virtual" FDD duplex mode. However, this method is only a combination of traditional TDD and traditional FDD duplex methods, and the basic problems of traditional TDD and traditional FDD have not been solved. For example, TDD lacks the ability to support high-speed mobility, and FDD lacks the ability to support asymmetric services. Fundamental issues still carry over to layered radio access network architectures. the

To sum up, in the current layered wireless access network architecture and related working methods, there are the following problems that need to be solved: the use of control channels has not been improved from the level of evolution of the more basic duplex mode, although In the prior art, for example, US Patent Application No. US5,546,443 discloses "A Hierarchical Wireless Access System and Working Method", and also proposes the separation of control channels and traffic channels in a hierarchical access network , but this separation is only the separation of the traffic channel and the control channel in the paired or non-paired frequency spectrum used by the same system, and the separation of the traffic channel and the control channel is not performed between the paired and non-paired frequency spectrum. Therefore, Existing technologies cannot produce the effect of allowing business data to use the reciprocity of unpaired spectrum and its flexibility for asymmetric services, while allowing control channels to use the low delay of paired spectrum, and cannot improve hierarchical wireless networks. The flexible support capability of the access network for asymmetric services and the spectrum efficiency for terminal services under high-speed mobility; while the existing FDD system and TDD system complement each other only for traditional TDD and FDD duplex methods Combination, does not solve the basic problems of the traditional TDD and FDD approach. In addition, the current inter-layer cooperation is based on the inter-layer switching technology, and does not use the intra-layer and inter-layer inter-node scheduling technology with better dynamic performance. the

Contents of the invention

Considering one or more of the above-mentioned problems existing in related technologies, the present invention is proposed. Therefore, the present invention aims to provide a layered heterogeneous wireless access network system and a layered heterogeneous wireless access network implementation In the method, by using a duplex mode based on the separation of service and control and node scheduling technology, the organic coordination between the FDD system and the TDD system can be truly realized, and the comprehensive performance of the layered wireless access network can be further improved. the

According to one aspect of the present invention, a hierarchical heterogeneous radio access network system is provided. the

The hierarchical heterogeneous radio access network system according to the embodiment of the present invention includes: a first wireless node layer using paired spectrum, wherein the first wireless node layer includes one or more first wireless nodes using paired spectrum, Wherein, the paired spectrum includes a spectrum used for uplink transmission and a spectrum used for downlink transmission; the second wireless node layer using unpaired spectrum, the second wireless node layer includes a plurality of second wireless node layers using unpaired spectrum The wireless node, wherein the unpaired spectrum is a spectrum that supports uplink and downlink transmission modes; the resource management and duplex control unit is used to manage and allocate the paired spectrum and the unpaired spectrum, and control the first wireless node and The second wireless node communicates with the wireless terminal in a hybrid duplex manner in which service and control are separated, wherein, in the hybrid duplex manner in which service and control are separated, the second wireless node layer is used to bear wireless For the uplink/downlink service data of the terminal, the first wireless node layer is used to bear the control data required for transmitting the uplink/downlink service data; the inter-node scheduling control unit is used to send the wireless terminal to the wireless terminal through the first wireless node layer in one of the following ways Perform inter-node scheduling: select the optimal node from the second wireless node layer, assign some or all resources of the optimal node to the wireless terminal, and select the optimal node from the first wireless node layer and the second wireless node layer , and assign part or all of the resources of the optimal node to the wireless terminal; the baseband processing unit is used to perform baseband processing on signals from and/or sent to the first wireless node and/or the second wireless node; the wireless terminal works The frequency spectrum used by the first wireless node and the second wireless node is used for communicating with the hierarchical heterogeneous wireless access network. the

Preferably, the above-mentioned inter-node scheduling control unit sends/receives inter-node scheduling control signaling through the first wireless node layer, so as to perform inter-node scheduling on the wireless terminal. the

Preferably, the communication mode between the first wireless node and the wireless terminal is one of the following modes: use the paired frequency spectrum used by the first wireless node to communicate with the wireless terminal in a full frequency division duplex mode or a half frequency division duplex mode; Under the control of the resource management and duplex control unit, part of the spectrum in the paired spectrum used by the first wireless node and the unpaired spectrum used by the second wireless node are used to communicate with the wireless network in a hybrid duplex manner in which business and control are separated. terminal communication. the

Preferably, the communication mode between the second wireless node and the wireless terminal is one of the following ways: use the unpaired frequency spectrum used by the second wireless node to communicate with the wireless terminal in a time division duplex manner; in the resource management and duplex control unit Under control, use part or all of the unpaired spectrum used by the second wireless node and part of the paired spectrum used by the first wireless node to communicate with the wireless terminal in a hybrid duplex manner that separates business from control . the

Preferably, the baseband processing unit performs baseband processing on signals from and/or sent to the second wireless node and/or the first wireless node in a distributed base station manner. the

Preferably, the first wireless node is used for the coverage of the macro cell, and the second wireless node is used for the coverage of the micro cell or the macro cell, wherein, there are one or more micro cells or one or more micro cells in the macro cell covered by the first wireless node A plurality of second wireless nodes are used to cover the microcell, or a macrocell covered by a first wireless node overlaps a microcell covered by one or more second wireless nodes. the

Preferably, the first wireless node includes any of the following: a radio frequency unit of a base station with baseband processing working in a frequency division duplex mode or a remote radio unit of a distributed base station working in a frequency division duplex mode; The wireless node includes any of the following: the radio frequency unit of the base station with baseband processing operating in the time division duplex mode, the remote radio unit of the distributed base station operating in the time division duplex mode, or the radio frequency unit operating in the time division duplex mode. digital repeater. the

Preferably, the baseband processing unit and the resource management and duplex control unit exist as the same network element in the hierarchical heterogeneous wireless access network system. Or, the baseband processing unit and the resource management and duplex control unit exist as different network elements in the hierarchical heterogeneous radio access network system. the

According to another aspect of the present invention, a method for implementing a hierarchical heterogeneous wireless access network is provided, wherein the hierarchical heterogeneous wireless access network includes a first wireless node layer using paired spectrum and using unpaired In the second wireless node layer of spectrum, paired spectrum includes a spectrum for uplink transmission and a spectrum for downlink transmission, and unpaired spectrum is a spectrum that supports uplink and downlink transmission. the

The implementation method of the layered heterogeneous wireless access network according to the embodiment of the present invention includes the following processing: use the second wireless node layer to bear the uplink/downlink service data of the wireless terminal in a time division duplex manner; use the first wireless node layer to bear the transmission Control data required for uplink/downlink business data; use the first wireless node layer to perform inter-node scheduling for wireless terminals, wherein the inter-node scheduling adopts one of the following methods: according to the signal quality of each node, select from the second wireless node layer the optimal node, and assign part or all of the resources of the optimal node to the wireless terminal, and, according to the signal quality of each node, select the optimal node from the first wireless node layer and the second wireless node layer, and assign the optimal node Some or all of the resources of the node are assigned to the wireless terminal. the

Preferably, the transmission mode of the control data is any of the following: two spectrums in the paired spectrum work in a frequency division duplex mode, the spectrum used for uplink transmission carries uplink control data, and the spectrum used for downlink transmission carries downlink control data. Control data; the spectrum used for uplink transmission in the paired spectrum and the unpaired spectrum work in frequency division duplex mode, the spectrum used for uplink transmission carries uplink control data, and the unpaired spectrum carries service data; in the paired spectrum The spectrum used for downlink transmission and the unpaired spectrum work in frequency division duplex mode, the spectrum used for downlink transmission carries downlink control data, and the unpaired spectrum carries service data. the

Preferably, the unpaired frequency spectrum is a combination of multiple unpaired frequency spectrums that are discontinuous in the frequency domain or a segment of unpaired frequency spectrum that is continuous in the frequency domain. the

Through at least one technical solution of the present invention, the following beneficial effects are achieved: by introducing a duplex mode in which service and control are separated into the hierarchical wireless access network, the wireless access system not only retains the channel reciprocity of TDD As well as the flexibility of uplink/downlink services and the advantages of low feedback delay of FDD, the dynamic performance and throughput of the TDD air interface are improved. the

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. the

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a schematic diagram showing the architecture of a layered heterogeneous wireless access network system according to an embodiment of the present invention;

Fig. 2 is a flowchart of a method for implementing a hierarchical heterogeneous wireless access network according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the use of frequency spectrum by hybrid duplex separation of business and control according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a layered heterogeneous wireless access network using a hybrid duplex mode according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of using half-duplex FDD and inter-layer inter-node scheduling in a layered heterogeneous wireless access network according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of a layered heterogeneous wireless access network using a hybrid duplex mode and intra-layer inter-node scheduling according to an embodiment of the present invention. the

Detailed ways

As mentioned above, in the currently adopted layered wireless access network architecture and related working methods, it is necessary to separate the control channel and traffic channel in the layered access network to reduce the handover of mobile terminals in micro-intervals. frequency to simplify the mobility management of terminals, but this separation of control channels and traffic channels is only performed within the same system, or only within the paired or unpaired frequency spectrum used by a single system The traffic channel and the control channel are separated, but the traffic channel and the control channel are not separated between the paired and unpaired frequency spectrum. Therefore, the existing technology cannot produce the reciprocity and Its flexibility to asymmetric services, while allowing the control channel to utilize the effect of low delay of the paired spectrum. As for the FDD system and the TDD system in the prior art to form a hybrid duplex method by borrowing each other's spectrum, for example, let a wireless terminal use a part of the paired spectrum of the FDD system and the unpaired frequency spectrum of the TDD system. A part of the frequency spectrum works in full/half frequency division duplex mode, which is only a combination of traditional TDD and FDD duplex modes, and does not solve the basic problems of traditional TDD and FDD modes. the

In view of this, the cooperative work between the TDD system and the FDD system is a development trend of the radio access network, and with the cooperative work between the TDD system and the FDD system What is generated is the aggregation of paired spectrum and unpaired spectrum. The aggregation of paired spectrum and unpaired spectrum lays a physical foundation for the construction of a new duplex mode. On this basis, the traffic channel and control channel are realized in the unpaired A new hybrid duplex method can be constructed by separating and paired spectrum. the

Aiming at a type of layered wireless access network such as realizing macro cell coverage by FDD air interface and micro cell coverage by TDD air interface, the embodiment of the present invention provides a layered heterogeneous wireless access network system and a layered heterogeneous wireless access network system. Network access implementation method: firstly, a new duplex mode of hybrid duplex with separation of service and control is introduced in the layered heterogeneous wireless access network, so that the layered wireless access network retains TDD channel reciprocity performance and flexibility of uplink/downlink services, as well as various advantages brought by the low feedback delay of FDD, which can improve the dynamic performance and throughput of the TDD air interface; secondly, in the layered heterogeneous wireless access network Introduced inter-node scheduling, including inter-layer inter-node scheduling and intra-layer inter-node scheduling, in order to achieve the following effects: 1) Enable the micro cell wireless nodes working in TDD mode on high-end spectrum (for example, around 5GHz) to support high-speed mobile terminals , thereby expanding the application range of the high-end spectrum; 2) improving the transmission rate of the terminal located at the edge of the micro cell. the

The hierarchical heterogeneous wireless access network described below is built on the basis of the system specified by the 3GPP LTE FDD standard and the system specified by the 3GPP LTE TDD standard, and the hierarchical heterogeneous wireless access network can support the following working methods: (1) Duplex mode with separation of business and control (SCS-HDD: Hybrid Division Duplex based on the Separation of Control and Service); (2) Half-duplex FDD (Half Frequency Division Duplex, or (T+F)DD); (3) Intra-layer inter-node scheduling and inter-layer inter-node scheduling. the

For the two types of spectrum involved in the following, namely, paired spectrum and unpaired spectrum, usually, paired spectrum includes a spectrum used for uplink transmission and a spectrum used for downlink transmission, and unpaired spectrum is a two-way way to use the spectrum. the

Typically, spectrum B is allocated as an unpaired spectrum for a TDD system. Specifically, spectrum B is a spectrum used in a bidirectional manner, and can be used for both uplink transmission and downlink transmission. For a duplex environment where business and control are separated, configure uplink and downlink traffic channels on spectrum B. In addition to bearing service data, frequency spectrum B also bears reference symbols (or pilot symbols) for channel estimation. Among them, spectrum B can be a continuous unpaired spectrum in the frequency domain, or a combination of multiple unpaired spectrums that are discontinuous in the frequency domain. For the combined spectrum B, flexible provision of services and Realize that multiple TDD systems work together. the

Spectrum U is the spectrum used only for uplink transmission. Generally, spectrum U is the uplink spectrum of the paired spectrum used by the FDD system; spectrum D is the spectrum used only for downlink transmission. Generally, spectrum D is the component spectrum used by the FDD system. For the uplink spectrum of the spectrum, the spectrum D may also be the spectrum used for downlink broadcasting, such as the broadcasting spectrum used for MBMS or DVB-T. the

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. the

System embodiment

According to an embodiment of the present invention, a layered heterogeneous radio access network system is provided. the

Fig. 1 is a schematic structural diagram showing a hierarchical heterogeneous radio access network system according to an embodiment of the present invention. Wherein, in order to avoid adjacent frequency band interference between the TDD system and the FDD system, in this embodiment, the TDD system and the FDD system are respectively installed on different sites. the

As shown in Figure 1, the hierarchical heterogeneous wireless access network system according to the embodiment of the present invention includes:

(1) a first wireless node layer using a paired frequency spectrum, wherein the first wireless node layer includes one or more first wireless nodes using a paired frequency spectrum (a first wireless node 101 is shown in FIG. 1 ), Wherein, as mentioned above, the paired spectrum mentioned here includes a spectrum for uplink transmission (for example, spectrum U) and a spectrum for downlink transmission (for example, spectrum D); wherein, the first wireless node may be Any of the following: the radio frequency unit of the base station with baseband processing working in frequency division duplex mode or the remote radio unit (Remote Radio Unit, RRU for short) of the distributed base station in frequency division duplex mode, wireless Repeaters, base stations supporting 3GPP LTE FDD standards, etc.;

(2) The second wireless node layer using unpaired frequency spectrum, the second wireless node layer includes a plurality of second wireless nodes 102 using unpaired frequency spectrum (exemplary three second wireless nodes are shown in FIG. 1 102a-102c), these second wireless nodes working in the TDD mode may be wireless nodes using the same air interface standard, or wireless nodes using different air interface standards, wherein the unpaired spectrum supports uplink and downlink Spectrum of the transmission mode (for example, spectrum B); wherein, the second wireless node can be any of the following: the radio frequency unit of the base station with baseband processing working in time division duplex mode, the distributed radio node working in time division duplex mode The remote radio unit of the base station, the wireless digital repeater working in time division duplex mode, or the base station supporting the 3GPP LTE TDD standard, etc.;

(3) The baseband processing unit 107 is configured to perform baseband processing on the signals from and/or sent to the first wireless node and/or the second wireless node layer, specifically, the baseband processing unit processes the above-mentioned signals in the form of a distributed base station Perform baseband processing;

The baseband processing unit and the resource management and duplex control unit may exist in the hierarchical heterogeneous wireless access network system as the same network element, or may exist in the hierarchical heterogeneous wireless access network as different network elements in the system;

The baseband processing unit is also used to obtain terminal duplex capability information, and provide the above information to the resource management and duplex control unit 104, so that resource management and duplex control The unit can control the duplex mode of the terminal according to the spectrum resources of the relevant nodes in the current first and second wireless node layers and the duplex capability information provided by the baseband processing unit;

In addition, the baseband processing unit is also used to provide the channel quality measurement data reported by the terminal to the inter-node scheduling control unit 108, so that the inter-node scheduling control unit can perform inter-node scheduling on the terminal according to the channel quality;

(4) One or more resource management and duplex control units 104, used to manage and allocate paired spectrum (spectrum U and spectrum D) and unpaired spectrum (spectrum B), and control the first wireless node 101 , The second wireless node 102 communicates with the wireless terminal in a hybrid duplex mode in which business and control are separated;

(5) An inter-node scheduling control unit 108, configured to perform inter-node scheduling on wireless terminals 103; specifically, the inter-node scheduling control unit sends/receives inter-node scheduling for performing inter-node scheduling on wireless terminals through the first node layer Control signaling. the

(6) The wireless terminal 103 works on the frequency spectrum used by the first wireless node and the second wireless node, and is used for communicating with the hierarchical heterogeneous wireless access network. The wireless terminal 103 may support all air interface standards used by wireless nodes in the wireless node layer using unpaired spectrum, or may only support multiple air interfaces used by wireless nodes in the wireless node layer using unpaired spectrum part of the standard. Specifically, the wireless terminal 103 can be a dual-mode terminal supporting 3GPP LTE FDD and TDD standards, and can work in a half-duplex FDD mode on the following spectrum: (1) spectrum U and spectrum D; (2) spectrum U and spectrum B ; (3) Spectrum D and Spectrum B, moreover, can also work in TDD mode on non-paired Spectrum B. the

Preferably, there is a low-latency transmission channel between the second wireless node and the first wireless node covering the second wireless node in the first wireless node layer. the

Preferably, the first wireless node is used for the coverage of the macro cell 105, and the second wireless node is used for the coverage of the micro cell or macro cell, wherein there are one or more micro cells in the macro cell Area or one or more second wireless nodes used to cover micro cells (for example, in the area covered by the first wireless node 101, there are multiple second wireless nodes 102 working in TDD mode using non-paired radio node layer of the spectrum), or the macro cell overlaps a micro cell covered by one or more second radio nodes. the

Wherein, the wireless terminal 103 accesses a channel on the working spectrum (spectrum B) of the second wireless node 102 from the spectrum (spectrum D, spectrum U) used by the first wireless node 101 . In order to realize this access, the wireless frames between the FDD system and the TDD system maintain a specific synchronization relationship in time. A synchronization relationship is shown in Figure 4: the starting time of the TDD wireless frame lags or advances the FDD wireless frame by one Fixed time delay Td, the value range of Td is: -10ms<Td<10ms. A negative value of Td indicates that the frame header of the TDD radio frame is ahead of the frame header of the FDD radio frame in time, and a zero value of Td indicates that the frame header of the TDD radio frame is strictly synchronized with the frame header of the FDD radio frame in time. the

Various aspects of the above processing will be described in detail below. the

(1) Hybrid duplex mode with separation of business and control

In the above-mentioned hybrid duplex mode where business and control are separated, the second wireless node layer is used to bear the uplink/downlink service data of the wireless terminal in TDD mode, and the first wireless node layer is used to bear the uplink/downlink service data of the wireless terminal. Control data required by business data. the

That is to say, the first wireless node 101 is characterized in that, in addition to supporting the functions specified in the 3GPP LTE FDD standard, it also supports the transmission of the control data required by the hybrid duplex described in the present invention on the spectrum U and the spectrum D, Its support mode can be one of the following ways: (1) the wireless node 101 occupies the control channel resource in the 3GPP LTE FDD standard to transmit the control data for the transmission service of the service data on the spectrum B; (2) the wireless node 101 occupies the 3GPP The traffic channel resources in the LTE FDD standard are used to transmit control data serving for the transmission of traffic data on spectrum B. the

The second wireless node 102 working in TDD mode is characterized in that it can work in the following three ways: (1) it can independently provide services to the wireless terminal 103 in the manner stipulated in the 3GPP LTE TDD standard; (2) it can be used in resource management Under the management and control of the duplex control unit 104, the resources of the spectrum B are divided into two parts for use, a part of the spectrum, radio frequency channels, and processing resources are used to independently provide services to the wireless terminal 103 in a manner stipulated in the TDD standard, and a part of the spectrum, The radio frequency channels and processing resources are used in the hybrid duplex mode in which business and control are separated according to the present invention, that is, only these channels on spectrum B carry business data, and the control data required for transmission of business data is composed of spectrum D and Spectrum U bearer; this method is a way to realize smooth transition in the process of 3GPP LTE FDD standard and 3GPP LTE TDD standard to multi-network coordinated evolution; (3) all the spectrum, radio frequency channels and processing resources of the second wireless node 102 are used for In the hybrid duplex described in the present invention, only these channels on spectrum B carry service data, and the control data required for transmitting service data is carried by spectrum D and spectrum U. In the following description, the above-mentioned second working mode will be used as an example for description. the

By introducing a hybrid duplex mode in which business and control are separated, the layered heterogeneous wireless access network not only retains the channel reciprocity of TDD and the flexibility of uplink and downlink services, but also has the low feedback delay band of FDD various advantages. the

Based on the above-described hybrid duplex mode in which business and control are separated, the communication between the first or second wireless node and the wireless terminal can be described as follows:

(1) The communication method between the first wireless node and the wireless terminal includes: using the paired frequency spectrum used by the first wireless node to communicate with the wireless terminal in a full FDD mode or a half frequency division duplex mode; in the resource management and duplex control unit Under the control of , using part of the paired frequency spectrum used by the first wireless node and the non-paired frequency spectrum used by the second wireless node, communicates with the wireless terminal in a hybrid duplex mode in which business and control are separated. the

(2) The communication method between the second wireless node and the wireless terminal includes: using the unpaired frequency spectrum used by the second wireless node to communicate with the wireless terminal in a TDD manner; in resource management Under the control of the duplex control unit, part or all of the unpaired spectrum used by the second wireless node and part of the paired spectrum used by the first wireless node are used to form a hybrid dual Communicate with wireless terminals in a work mode. the

As mentioned above, although the high-frequency band (spectrum above 3 GHz) is very rich, under the existing access network architecture and duplex mode, this rich spectrum cannot support high-speed mobility. The service and control phase provided by the present invention The separated hybrid duplex mode enables the spectrum to support high-speed mobile. the

(2) Inter-node scheduling

The way in which the inter-node scheduling control unit performs inter-node scheduling on the wireless terminal through the first wireless node layer includes the following two methods: (Mode 1) select the optimal node from the second wireless node layer, and allocate some or all resources of the optimal node Assigned to wireless terminals, this scheduling method is called intra-layer inter-node scheduling in this paper; (method 2) select the optimal node from the first wireless node layer and the second wireless node layer, and part or All resources are assigned to wireless terminals, and this scheduling method is called inter-layer inter-node scheduling in this paper. the

Through the above-mentioned inter-node scheduling, the spectrum resources of the macro cell layer and the spectrum resources of the micro cell are used comprehensively to support high-speed mobile terminals, which expands the application range of high-end spectrum and improves the transmission rate at the edge of the cell. the

Method Example

According to an embodiment of the present invention, a method for implementing a hierarchical heterogeneous wireless access network is provided, wherein the hierarchical heterogeneous wireless access network includes a first wireless node layer using a paired spectrum (spectrum U and spectrum D) And the second wireless node layer using the unpaired frequency spectrum, wherein the unpaired frequency spectrum (spectrum B) is a frequency spectrum that supports uplink and downlink transmission modes, and the paired frequency spectrum includes a frequency spectrum (spectrum U) for uplink transmission and a frequency spectrum (spectrum U) for uplink transmission Spectrum used for downlink transmission (spectrum D). the

Fig. 2 is a flowchart showing a method for implementing a hierarchical heterogeneous wireless access network according to an embodiment of the present invention. As shown in Fig. 2, the method includes the following processing:

Step S202, using the second wireless node layer to bear the uplink/downlink service data of the wireless terminal in a time-division duplex manner; using the first wireless node layer to bear the control data required to transmit the uplink/downlink service data;

Step S204, using the first wireless node layer to perform inter-node scheduling on the wireless terminal. the

Details of the above processing will be further described below. the

(1) Step S202

In step S202, as shown in FIG. 3 , the transmission mode of control data is any of the following: (Mode 1) Both spectrums in the paired spectrum work in FDD mode, and one spectrum (spectrum U) carries uplink control For data, another spectrum (spectrum D) carries downlink control data; (method 2) the spectrum (spectrum U) for uplink transmission in the paired spectrum (spectrum U) and the non-paired spectrum (spectrum B) work in FDD mode, and spectrum U carries For uplink control data, spectrum B carries service data; (method 3) the spectrum (spectrum D) for downlink transmission in the paired spectrum and the non-paired spectrum (spectrum B) work in FDD mode, and spectrum D carries downlink control data. Spectrum B carries service data. It is mentioned here that the FDD method can be full-duplex FDD or half-duplex FDD. the

Through this process, the hierarchical heterogeneous wireless access network can support the hybrid duplex (SCS-HDD: Hybrid Division Duplex based on the Separation of Control and Service), and then the hierarchical heterogeneous wireless access network can Network access not only retains the channel reciprocity of TDD and the flexibility of uplink and downlink services, but also has various advantages brought by the low feedback delay of FDD. the

(2) Step S204

In this step, the mode of inter-node scheduling is any of the following: (1) intra-layer inter-node scheduling, according to the signal quality of each node, the optimal node is selected from the second wireless node layer, and the part of the optimal node or all resources assigned to wireless terminals; (2) inter-layer inter-node scheduling, according to the signal quality of each node, select the optimal node from the first wireless node layer and the second wireless node layer, and part or All resources are assigned to wireless terminals; the role of inter-layer inter-node scheduling is to realize the complementarity in signal coverage between the wireless node layer using unpaired spectrum and the wireless node layer using paired spectrum. the

Referring to the schematic diagram in Figure 1, the above processing can be described as follows:

Intra-layer inter-node scheduling: the wireless terminal assigns a group of second wireless nodes (such as wireless node 102a, wireless node 102b, and wireless node 102c) that it detects belong to the wireless node layer (second wireless node layer) using unpaired spectrum ) report the signal quality data to the resource management and duplex control unit 104, and the resource management and duplex control unit 104 assigns the wireless terminal an optimal The wireless node, such as the wireless node 102b, is used to bear the service data of the terminal. the

Inter-layer inter-node scheduling: The wireless terminal detects a group of wireless nodes (such as wireless node 102a, wireless node 102b, and wireless node 102c) that belong to the wireless node layer that uses unpaired spectrum, and a group that belongs to the wireless node layer that uses paired spectrum. The signal quality data of wireless nodes (such as wireless node 101) in the wireless node layer of the frequency spectrum are reported to the resource management and duplex control unit 104, and the resource management and duplex control unit 104 uses unpaired spectrum and Among the wireless nodes of the paired frequency spectrum, an optimal wireless node is assigned to the wireless terminal to bear the service data of the terminal. the

Through this processing, the spectrum resources of the macro cell layer and the spectrum resources of the micro cell can be used comprehensively to jointly support high-speed mobile terminals, thereby expanding the application range of the high-end spectrum. the

The following further describes the technical solutions provided by the embodiments of the present invention in combination with examples. the

Example 1: Hierarchical heterogeneous wireless access network using hybrid duplex SCS-HDD mode

Fig. 4 is a schematic diagram of a hierarchical heterogeneous radio access network using a hybrid duplex mode according to an embodiment of the present invention, and the processing in this example will be described below with reference to Fig. 4 . the

First, the wireless terminal completes the access to the traffic channel in the wireless node layer using the unpaired spectrum on the wireless node layer using the paired frequency spectrum. the

At time T1, the wireless terminal 103 completes cell synchronization on the frequency spectrum (spectrum D) used by the wireless node 101 and acquires cell broadcast information issued by the frequency spectrum. The cell broadcast information may contain an indication of the availability of the service channel on spectrum B, for example, whether there are resources available on spectrum B that can be used for hybrid duplex separation of business and control;

At time T2, wireless terminal 103 requests access to spectrum B from the network through spectrum U. Further, wireless terminal 103 includes its own service capability information in the information reported to request access to spectrum B. Ability to phase separate mixed duplexes;

At time T3, the network issues the resource permission data on spectrum B to the wireless terminal 103 through the control channel on spectrum D. The resource management and duplex control unit 104 on the network side sends a control command to the terminal to use the hybrid duplex with service and control phase separation according to the duplex capability reported by the wireless terminal, and allocates the resource size of the uplink and downlink traffic channels to the wireless terminal 103 and resource locations, such as channel locations. In this example, the resources allocated by the network for the wireless terminal 103 are as shown in Figure 4: the resource blocks in the uplink time slots 5 and 6, and time slots 9 and 10 on the spectrum B on the wireless frame belonging to the wireless node 102 are used for The set of transport blocks used to carry uplink service data; the resource blocks in the downlink time slots 11 and 12, 16 and 17 of the radio frame on spectrum B are used to carry the set of transport blocks for downlink service data; the time slots on spectrum D Slot 12 is used to transmit downlink control data; time slot 18 on spectrum U is used to transmit uplink control data;

Afterwards, the wireless terminal 103 transmits service data on the uplink/downlink service channel belonging to spectrum B assigned by the network. The process of the wireless terminal using the business and control phase separation hybrid duplex to transmit the uplink business data is as follows:

The wireless terminal 103 passes through the receiving channel on the wireless node 102. At time ①, the wireless terminal 103 accesses the uplink time slots 5 and 6 on the frequency spectrum B to complete the transmission data block within a transmission time interval (Transmission Time Interval, referred to as TTI) Sending of aggregated business data. Afterwards, at time ②, the wireless terminal 103 accesses the time slot 12 on the wireless frame on the frequency spectrum D used by the wireless node 101, so as to obtain the feedback control data issued by the network, for example, obtain adaptive modulation and coding control data (AMC) , retransmission request data (ARQ), etc.; then, the wireless terminal 103 adjusts its transmission parameters according to these feedback control data, and then the wireless terminal 103 accesses the uplink on spectrum B at time ③ through the receiving channel on the wireless node 102 Time slots 9 and 10, within this time interval, the transmission of the service data of the transmission data block set in the next transmission time interval (TTI) is completed. the

Afterwards, the wireless terminal transmits downlink business data using the hybrid duplex with separation of business and control phases, and the process is as follows:

When the wireless terminal 103 passes through the transmission channel on the wireless node 102, at time A, the wireless terminal accesses the downlink time slots 11 and 12 on the frequency spectrum B, and completes the transmission data block within a transmission time interval (TTI) during this period After receiving the aggregated service data, at time B, the wireless terminal 103 accesses the time slot 18 on the wireless frame on the frequency spectrum U used by the wireless node 101, and sends feedback control data to the network in this time slot, for example, adaptive modulation Coded control data (AMC) adjustment data, retransmission request data (ARQ), channel state or channel quality indication data, etc.; wireless node 101 adjusts its transmission parameters according to the feedback control data reported by these terminals, and then, at time C, the wireless terminal 103 accesses the transmission channel on the wireless node 102, and completes receiving the service data of the transmission data block set in the next transmission time interval (TTI) in the downlink time slots 16 and 17 on the frequency spectrum B. the

Example 2: Layered heterogeneous wireless access network uses half-duplex FDD mode, adopts inter-layer inter-node scheduling

Fig. 5 shows a schematic diagram of a layered heterogeneous wireless access network using half-duplex FDD and inter-layer inter-node scheduling according to an embodiment of the present invention. As shown in Fig. 5, the implementation process of this example can be described as follows:

At time T1, the wireless terminal uses the time slot 1 of the wireless frame on the frequency spectrum U to send uplink scheduling request information and to the wireless nodes in the wireless node layer (first wireless node layer) using the paired frequency spectrum and the wireless nodes using the unpaired frequency spectrum Measurement information of wireless node signals in the wireless node layer (second wireless node layer), including signal quality information for wireless nodes 101 and 102, for example, reporting signal measurement data for multiple adjacent wireless nodes 102a-102c ; At time T2, the wireless terminal receives scheduling control command data from time slot 5 on the frequency spectrum D, and the received scheduling control command is assigned to the wireless terminal to use the time slots 14 and 15 of the wireless frame on the frequency spectrum U to send uplink services data. the

Example 3: Layered heterogeneous wireless access network uses SCS-HDD mode, adopts inter-layer inter-node scheduling

FIG. 6 is a schematic diagram of a layered heterogeneous wireless access network using a hybrid duplex mode and intra-layer inter-node scheduling. The implementation process of this example will be described below with reference to FIG. 6 . the

At time T1, the wireless terminal uses the time slot 1 of the wireless frame on the frequency spectrum U to transmit the measurement information of the wireless node signal in the wireless node layer (the second wireless node layer) using the unpaired frequency spectrum, for example, for two adjacent The measurement data of the signals of two wireless nodes 102a, 102b. At time T2, the wireless terminal receives the downlink scheduling control command data from the time slot 5 on the frequency spectrum D, and the received downlink scheduling control command is assigned to the wireless terminal. The wireless node 102a of the wireless subframe 101a uses resources on time slots 7 and 8 to receive downlink service data, and then the wireless terminal receives downlink data at time ①. the

At time T3, the wireless terminal uses the time slot 17 of the wireless frame on the spectrum U to transmit measurement information on the wireless node signals in the wireless node layer using the unpaired spectrum, for example, the signals of two adjacent wireless nodes 102a, 102b measurement data, at time T4, the wireless terminal receives the downlink scheduling control command data from the time slot 19 on the frequency spectrum D, and the received downlink scheduling control command is assigned to the wireless terminal using the wireless node 102b on the spectrum B. The resources on the time slots 19 and 20 of the subframe 104b are used to receive downlink service data, and then the wireless terminal receives the downlink data at time ②. the

In this embodiment, since the terminal 103 accesses the traffic channel on the spectrum B on the wireless node 102 from the spectrum D used by the wireless node 101, its access time can be significantly shortened, and it has the same fast access as the FDD system; Since the data transmission of the terminal 103 on the spectrum B can be fast feedback controlled like FDD, its spectrum efficiency, especially the spectrum efficiency under high-speed mobile conditions, can be the same as that of the FDD system. the

In the example given above, the details of the 3GPP LTE TDD TYP II radio frame structure are omitted, for example, three special time slots are not drawn, which does not affect the implementation of the embodiments of the present invention and its specific examples. The hybrid duplex method in which service and control are separated in the embodiment of the present invention is applicable to the cooperative work between any FDD system and any TDD system. In this paper, only the commonality of TDD systems is discussed. the

Since service data is the main wireless load of the wireless access network, and the asymmetry of the air interface load is mainly caused by service data, in this embodiment, the service data is transmitted in TDD mode to ensure the use efficiency of spectrum; and the control data The uplink and downlink transmission of TDD has the characteristics of symmetry, so FDD is a reasonable way to transmit control data, and the characteristics of FDD low delay ensure the fast feedback of control data, so that the business data carried by TDD has a good performance. dynamic adaptability. the

The foregoing embodiments of the present invention and their examples are based on the system specified by the 3GPP LTE FDD standard and the system specified by the 3GPP LTE TDD standard to construct a hierarchical heterogeneous wireless access network, but the present invention is not limited to the above two systems Hierarchical Heterogeneous Wireless The access network, the same principle and implementation process, can be applied to the layered heterogeneous wireless access network formed between other FDD and TDD systems. For example, according to the method described in this embodiment, the following layered heterogeneous wireless access network can also be implemented: Structure wireless access network:

(1) In the layered heterogeneous wireless access network, the wireless node layer (the first wireless node layer) using the paired spectrum is composed of the base station or RRU of the GSM system, and the wireless node layer (the second wireless node layer) using the unpaired spectrum Node layer) consists of base stations, wireless digital repeaters, or RRUs specified by the 3GPP LTE TDD standard;

(2) In the layered heterogeneous wireless access network, the wireless node layer (the first wireless node layer) using the paired spectrum is composed of the base station or RRU of the GSM system, and the wireless node layer (the second wireless node layer) using the unpaired spectrum Node layer) is composed of wireless nodes and wireless digital repeaters specified by the wireless local area network standard;

(3) In the hierarchical heterogeneous wireless access network, the wireless node layer (the first wireless node layer) using the paired spectrum is composed of the base station or RRU of the GSM system, and the wireless node layer (the second wireless node layer) using the unpaired spectrum Node layer) consists of base stations, wireless digital repeaters, or RRUs specified by the WiMAX standard;

(4) In the hierarchical heterogeneous wireless access network, the wireless node layer (the first wireless node layer) using the paired spectrum is composed of the base station or RRU of the GSM system, and the wireless node layer (the second wireless node layer) using the unpaired spectrum Node layer) consists of base stations, wireless digital repeaters, or RRUs specified by the TD-SCDMA standard;

(5) In the layered heterogeneous wireless access network, the wireless node layer (the first wireless node layer) using the paired spectrum is composed of the base station or RRU of the GSM system, and the wireless node layer (the second wireless node layer) using the unpaired spectrum Node layer) consists of base stations, wireless digital repeaters, or RRUs specified by the PHS standard;

(6) In the layered heterogeneous wireless access network, the wireless node layer using the paired spectrum is composed of the base station or RRU of the GSM system, and the wireless node layer using the unpaired spectrum is composed of Base stations, wireless digital repeaters, or RRUs regulated by WiMAX and 3GPP LTE TDD standards;

(7) In the layered heterogeneous wireless access network, the wireless node layer using paired spectrum is composed of base stations or RRUs of GSM system and 3GPP LTE FDD system, and the wireless node layer using unpaired spectrum is composed of WiMAX and 3GPP LTE TDD The base stations, wireless digital repeaters, or RRUs specified by these two standards are composed. the

The spectrum B in this embodiment can be any licensed spectrum of the TDD system, and can also use a part of the spectrum currently assigned to terrestrial television broadcasting, including VHF: 174MHz-230MHz, UHF: 470MHz-798MHz. Spectrum B may also be a license-exempt frequency band used by wireless local area networks. the

In addition, it should be noted that, in the present invention, uplink service data transmission refers to the service data sent by communication nodes such as wireless terminals and wireless repeaters to the network through the air interface; downlink service data transmission refers to the service data sent by the network to the wireless terminal through the air interface business data sent by communication nodes such as wireless repeaters and wireless repeaters; uplink control data transmission refers to the control data sent by communication nodes such as wireless terminals and wireless repeaters to the network through the air interface; downlink industry control data transmission refers to the network through the air interface Control data sent to communication nodes such as wireless terminals and wireless repeaters. The control data includes both control signaling data and radio environment measurement data. The uplink control data includes at least one of the following data: scheduling request information data, channel quality indication information (Channel Quality Indication, referred to as CQI) or channel state indication information data (Channel State Indication, referred to as CSI), ACK/NACK (acknowledgment /Non-confirmation) information data, PMI (Pre-coding MatrixIndex, precoding matrix index) information data, access request information data, adaptive modulation and coding information (Adaptive Modulation and Coding, referred to as AMC) data. The downlink control data includes at least one of the following data: scheduling information data (assigned resource location, coded transmission format, etc.) for downlink business data transmission, scheduling request permission indication information for uplink business data transmission, channel quality indication information data or channel status Indicates information data, automatically requesting retransmission information (Automatic Repeat Request, referred to as ARQ), PMI (Pre-coding Matrix Index, pre-coding matrix index) information data, access request permission information data, coded transmission format indication information data, power control data (Transmission Power Control, referred to as TPC), handover control data, Cell information broadcast data, cell synchronization data. the

Through the above at least one technical solution of the present invention, the following beneficial effects are achieved: (1) By introducing a duplex mode in which service and control are separated into the hierarchical wireless access network, the wireless access system not only retains the TDD channel Reciprocity and flexibility of uplink/downlink services, and various advantages of FDD's low feedback delay, thereby improving the dynamic performance and throughput of TDD air interface; (2) in the layered wireless access network architecture In the case of combining with the node scheduling technology, the micro cell wireless nodes working in TDD mode on the high-end spectrum (for example, around 5GHz) can support high-speed mobile terminals, thereby expanding the application range of the high-end spectrum; (3) layering The working method of the heterogeneous wireless access network is easy to implement under the existing spectrum planning; it can be compatible with the duplex mode of the existing system and realize smooth evolution. the

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. the

Claims (11)

1. a heterogeneous hierarchical wireless access network system is characterized in that, comprising:

Use the first radio node layer of paired frequency spectrum, wherein, the said first radio node layer comprises first radio node of the paired frequency spectrum of one or more uses, wherein, said paired frequency spectrum comprise one be used for uplink frequency spectrum and be used for the frequency spectrum of downlink transfer;

Use the second radio node layer of non-paired frequency spectrum, the said second radio node layer comprises second radio node of the non-paired frequency spectrum of a plurality of uses, and wherein, said non-paired frequency spectrum is a frequency spectrum of supporting the uplink and downlink transmission means;

Resource management and duplexing control unit; Be used for said paired frequency spectrum and said non-paired frequency spectrum are managed and distributed; And control said first radio node and said second radio node with professional with control communicating by letter of the mixing duplex mode that is separated and wireless terminal; Wherein, Mix in the duplex mode with control is separated in said business: the said second radio node layer be used for time division duplex carry wireless terminal/downlink service data, the said first radio node layer is used for carrying and transmits the needed control data of said/downlink service data;

Scheduling controlling unit between node is used to adopt one of following mode through the said first radio node layer wireless terminal to be carried out dispatching between node:

Select optimum node from the said second radio node layer, and with the part or all of resource assignation of said optimum node give said wireless terminal and,

From said first radio node layer and the said second radio node layer, select optimum node, and give said wireless terminal the part or all of resource assignation of said optimum node;

Baseband processing unit, be used for to from and/or the signal that is sent to said first radio node and/or said second radio node carry out Base-Band Processing;

Said wireless terminal works on said first radio node and the employed frequency spectrum of said second radio node, is used for communicating with the heterogeneous hierarchical wireless access network.

2. system according to claim 1 is characterized in that, the scheduling controlling unit is through scheduling control signaling between the said first radio node layer transmission/receiving node, so that said wireless terminal is carried out dispatching between node between said node.

3. system according to claim 2 is characterized in that, the communication mode of said first radio node and wireless terminal is one of following mode:

The paired frequency spectrum that uses said first radio node to use divides duplex mode or Half-Frequency Division Duplex mode and said wireless terminal communications with full range;

Under the control of said resource management and duplexing control unit; The non-paired frequency spectrum that uses partial frequency spectrum and said second radio node in the paired frequency spectrum that said first radio node uses to use, with said business with control be separated mix duplex mode and said wireless terminal communications.

4. system according to claim 3 is characterized in that, the communication mode of said second radio node and wireless terminal is one of following mode:

The non-paired frequency spectrum that uses said second radio node to use is with time division duplex and said wireless terminal communications;

Under the control of said resource management and duplexing control unit; Use the partial frequency spectrum in the paired frequency spectrum that part or all of frequency spectrum and first radio node in the non-paired frequency spectrum that said second radio node uses use, with said business with control be separated mix duplex mode and said wireless terminal communications.

5. according to each described system in the claim 1 to 4, it is characterized in that, said baseband processing unit with the mode of distributed base station to from and/or the signal that is sent to said second radio node and/or said first radio node carry out Base-Band Processing.

6. according to each described system in the claim 1 to 4; It is characterized in that; Said first radio node is used for the covering of macrocell; Said second radio node is used for the covering of Microcell or macrocell, wherein, has one or more Microcells or one or more said second radio nodes that are used to cover said Microcell in the macrocell that said first radio node is covered; Perhaps, said first radio node macrocell that is covered and the said Microcell that is covered by one or more said second radio nodes overlaps.

7. according to each described system in the claim 1 to 4; It is characterized in that, said first radio node comprise following any: with the radio frequency unit of the base station that has Base-Band Processing of FDD mode work or with the remote radio unit (RRU) of the distributed base station of FDD mode work; Said second radio node comprise following any: with the radio frequency unit of the base station that has Base-Band Processing of time division duplex work, with the remote radio unit (RRU) of the distributed base station of time division duplex work, or with the wireless digital repeater of time division duplex work.

8. according to each described system in the claim 1 to 4; It is characterized in that said baseband processing unit and said resource management and duplexing control unit are present among the said heterogeneous hierarchical wireless access network system as same network element or as different network elements.

9. the implementation method of a heterogeneous hierarchical wireless access network; It is characterized in that; Said heterogeneous hierarchical wireless access network comprises first radio node layer that uses paired frequency spectrum and the second radio node layer that uses non-paired frequency spectrum; Said paired frequency spectrum comprise one be used for uplink frequency spectrum and be used for the frequency spectrum of downlink transfer, said non-paired frequency spectrum is a frequency spectrum of supporting the uplink and downlink transmission means, said method comprises:

Use the said second radio node layer with time division duplex carry wireless terminal on/downlink service data;

Use the said first radio node layer to carry to transmit said on/the needed control data of downlink service data;

Use the said first radio node layer that wireless terminal is carried out dispatching between node, wherein, one of following mode is adopted in scheduling between said node:

According to the signal quality of each node, select optimum node from the said second radio node layer, and with the part or all of resource assignation of said optimum node give said wireless terminal and,

According to the signal quality of each node, from said first radio node layer and the said second radio node layer, select optimum node, and give said wireless terminal the part or all of resource assignation of said optimum node.

10. method according to claim 9 is characterized in that, the load mode of said control data be following any:

Two frequency spectrums in the said paired frequency spectrum are all worked with the FDD mode, and the said frequency spectrum that is used for uplink carries upload control data, the said frequency spectrum bearing downlink control data that is used for downlink transfer;

Said frequency spectrum and the said non-paired frequency spectrum that is used for uplink in the said paired frequency spectrum worked with the FDD mode, and the said frequency spectrum that is used for uplink carries upload control data, said non-paired frequency spectrum bearer service data;

Said frequency spectrum and the said non-paired frequency spectrum that is used for downlink transfer in the said paired frequency spectrum worked with the FDD mode, the said frequency spectrum bearing downlink control data that is used for downlink transfer, said non-paired frequency spectrum bearer service data.

11. according to claim 9 or 10 described methods, it is characterized in that, said non-paired frequency spectrum be the combination of discontinuous a plurality of non-paired frequency spectrums on the frequency domain or on frequency domain continuous one section non-paired frequency spectrum.

Images