CN102572961B

CN102572961B - The method of micro cell deployment WAP (wireless access point) channel and device

Info

Publication number: CN102572961B
Application number: CN201010577510.7A
Authority: CN
Inventors: 刁心玺; 许玲; 杨光
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-12-07
Filing date: 2010-12-07
Publication date: 2015-09-16
Anticipated expiration: 2030-12-07
Also published as: CN102572961A

Abstract

The invention discloses method and the device of a kind of micro cell deployment WAP (wireless access point) channel, to increase layering descending transmission bandwidth of wireless access network, wherein the method comprises: in one or more chronon interval that downlink radio frame cycle of the FDD macrocell WAP (wireless access point) in the FDD macrocell covering Microcell WAP (wireless access point) comprises, in the uplink spectrum that Microcell WAP (wireless access point) uses in this FDD macrocell WAP (wireless access point), with spatial reuse or time division multiplexing mode configurating downlink channel.Technical solution of the present invention achieves Microcell WAP (wireless access point) and utilizes FDD duplex guard band and/or utilize Microcell WAP (wireless access point) down channel to the spatial reuse of macrocell WAP (wireless access point) frequency spectrum to increase the technology of layering descending transmission bandwidth of wireless access network.

Description

Method and device for configuring micro-cell wireless access point channel

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for configuring a channel of a microcell wireless access point.

Background

Compared with the traditional voice service, one characteristic of the data service is asymmetry of uplink and downlink service data, and in most application scenarios, the transmission amount of the downlink data is greater than that of the uplink data. With the increase of data services, the uplink and downlink symmetric spectrum modes adopted by the conventional FDD (Frequency Division Duplex) have the obvious problem of low spectrum utilization efficiency when supporting asymmetric services.

The documents IST-2001-35125, D08, "Spectrum efficiency Multicast and asymmetry services in UMTS: multicast and asymmetric services that efficiently use spectrum in a terrestrial mobile communication system "analyze the asymmetry of 3G services from three aspects of service asymmetry, transport stream asymmetry and spectrum asymmetry. And, it analyzes the dynamic characteristics of the asymmetric business from three levels of user, cell and system: the asymmetry of the link-level service has a highly dynamic characteristic and changes violently with time/space; the asymmetry of the cell-level service has moderate dynamic characteristics, and the degree of change along with time/space is moderate; and the asymmetry of system level traffic has low dynamic characteristics and changes slowly with time/space.

Since the mobile communication service is configured by taking a cell or several adjacent cells as a unit, asymmetric service change in the cell is the most important basis for spectrum usage, that is, when the uplink and downlink spectrum resource configuration of the cell is considered, the mobile communication system complies with the principle of spectrum configuration supporting asymmetric service: the uplink and downlink resources are configured by taking a cell as a unit and can keep up with the moderate change of the asymmetry of the uplink and downlink services.

In the prior patent technology or patent application, a discussion of flexible usage of TDD and FDD duplex modes is presented.

US 20050174954 entitled "Method of operating a TDD/virtual FDD hierarchical cellular communication system" (a Method of operating a TDD/virtual FDD hierarchical cellular communication system) provides that, when a TDD microcell base station is covered by an FDD macrocell base station, the frequency spectrum of the FDD macrocell base station is used as a channel for the microcell base station to operate in a TDD mode, and when the TDD frequency spectrum is not enough and the FDD frequency spectrum is vacant, a TDD terminal is configured on the borrowed FDD frequency spectrum.

In PCT/GB2004/005324, entitled "CELLULAR communication SYSTEM", a scheme is presented for implementing TDD communication by a terminal on FDD uplink or downlink spectrum.

In patent application CN99810457, entitled "channel allocation in a telecommunication system with asymmetric uplink and downlink traffic, a technique for allocating radio channels in a time division multiple access time frame containing asymmetric downlink and uplink traffic channel fields is presented that divides these asymmetric downlink and uplink traffic channel fields into a plurality of regions, wherein each region has a desired level of inter-cell interference associated therewith; determining a sensitivity level of each of a plurality of mobile units to inter-cell interference; one of the plurality of regions is selected and radio channels in the selected region are assigned to the mobile unit based on a desired level of inter-cell interference associated with the selected region and a sensitivity level of the one of the plurality of mobile units to the inter-cell interference.

However, none of the above prior art provides a method for increasing downlink bandwidth by using FDD duplex protection by a micro cell wireless access point, and also provides a method for spatially multiplexing FDD macro cell spectrum by a micro cell wireless access point and a macro cell wireless access point.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a technology for configuring a microcell wireless access point channel to increase downlink transmission bandwidth of a layered wireless access network.

In order to solve the above technical problem, the present invention provides a method for configuring a channel of a microcell wireless access point, including:

in one or more time subintervals included in a downlink radio frame period of a Frequency Division Duplex (FDD) macrocell wireless access point in an FDD macrocell covering a microcell wireless access point, the microcell wireless access point configures a downlink channel in a spatial multiplexing or time division multiplexing mode on an uplink frequency spectrum used by the FDD macrocell wireless access point, wherein:

when the micro-cell wireless access point configures a downlink channel in a time division multiplexing mode, the downlink channel of the micro-cell wireless access point and the uplink channel of the FDD macro-cell wireless access point use the FDD macro-cell uplink frequency spectrum in a time division multiplexing mode;

when the micro-cell wireless access point configures a downlink channel in a spatial multiplexing mode, the downlink channel of the micro-cell wireless access point and the downlink channel of the FDD macro-cell wireless access point use the FDD macro-cell uplink frequency spectrum in a spatial multiplexing mode.

Preferably, the step of configuring the downlink channel by the micro cell wireless access point in a time division multiplexing manner includes:

the micro-cell wireless access point is configured between a downlink channel on an FDD macro-cell uplink frequency spectrum and an uplink channel on the FDD macro-cell uplink frequency spectrum, and works in a time division multiplexing mode, and the micro-cell wireless access point is configured on the downlink channel on the FDD macro-cell uplink frequency spectrum and only transmits signals to a terminal served by the micro-cell wireless access point on time-frequency resources vacated by the FDD uplink channel.

Preferably, in the time sub-interval, the micro cell wireless access point configures a downlink channel on an FDD duplex guard band used by the FDD macro cell access point, and transmits a signal to a terminal served by the micro cell wireless access point simultaneously with the downlink channel configured by the micro cell wireless access point on an uplink spectrum of the FDD macro cell wireless access point.

Preferably, the step of configuring the downlink channel by the microcell wireless access point in a spatial multiplexing manner includes:

and the micro-cell wireless access point configures a downlink channel on the uplink frequency spectrum of the FDD macro-cell access point, and the downlink channel configured on the uplink frequency spectrum of the FDD macro-cell by the micro-cell wireless access point and the FDD macro-cell wireless access point use the same frequency at the same time or use the frequency with overlapping frequency at the same time to transmit signals to the respective served terminals in the time subinterval.

Preferably, in the time sub-interval, the micro cell wireless access point configures a downlink channel on an FDD downlink frequency band used by the FDD macro cell access point and configures a downlink channel on an uplink spectrum of the FDD macro cell wireless access point with the micro cell wireless access point to transmit signals to a terminal served by the micro cell wireless access point at the same time.

Preferably, the step of the microcell wireless access point configuring a downlink channel on an FDD duplex guard band used by the FDD macrocell access point and transmitting a signal to a terminal served by the microcell wireless access point simultaneously with the downlink channel configured by the microcell wireless access point on the uplink spectrum of the FDD macrocell wireless access point includes:

and the time-frequency resources occupied by the downlink channel configured on the uplink frequency spectrum of the FDD macro cell and the downlink channel on the FDD duplex guard band are the same or overlap parts exist in time and frequency.

Preferably, the downlink channel configured on the uplink spectrum of the FDD macrocell and the downlink channel on the FDD duplex guard band are carried in the same timeslot on the same radio frame, or on timeslots occurring simultaneously on different radio frames where timeslot synchronization is maintained.

Preferably, the FDD duplex guard band includes:

a duplex guard band located intermediate the uplink and downlink paired bands allocated for use by the FDD system but not belonging to a Time Division Duplex (TDD) licensed band; or, the FDD uplink and downlink duplex guard band is located between the uplink frequency band and the downlink frequency band allocated to the FDD system and belongs to the TDD licensed frequency band.

Preferably, the duplex guard band which is located between the uplink and downlink paired bands allocated to the FDD system, but does not belong to the TDD licensed band, includes the duplex guard band located in the middle of the 790-862 MHz band allocated to the LTE FDD system; and the FDD uplink and downlink duplex protection frequency band is located between the uplink frequency band and the downlink frequency band which are allocated to the FDD system and belongs to the TDD licensed frequency band, and comprises the duplex protection frequency band in the middle of 2500-2690 MHz.

Preferably, a time sub-interval in the downlink radio frame period includes:

is contained in a complete FDD downlink radio frame period and has a duration less than a time subinterval of the FDD downlink radio frame period.

Preferably, the downlink channel of the micro cell includes a traffic channel and/or a control channel.

Preferably, the step of configuring the downlink channel includes:

configured to transmit signals by two or more physically independent radio frequency transmit channels;

or configured to transmit signals by one radio frequency transmission channel which is uniformly designed in physics.

Preferably, the signals are transmitted by two or more physically independent radio frequency transmission channels, including that the two or more physically independent radio frequency transmission channels respectively realize signal transmission on an FDD macrocell uplink frequency spectrum and an FDD duplex guard band by using respective independent power amplifiers, and respectively transmit own physical carriers; the method comprises the steps that a radio frequency transmitting channel which is designed in a unified manner in physics transmits signals, the radio frequency transmitting channel which is designed in a unified manner in physics uses the same power amplifier to realize signal transmission on an FDD uplink frequency band and an FDD duplex guard band, and independent physical carriers are transmitted on the FDD uplink frequency band and the FDD duplex guard band respectively, or signals which are modulated by the same physical carrier are transmitted on the FDD uplink frequency band and the FDD duplex guard band.

Preferably, the downlink channel configured by the microcell wireless access point is configured by using a radio frame structure as follows:

the method comprises the steps that a part of time slots in a complete downlink frame structure of an FDD system are formed; or, it is formed by time slots configured for downlink transmission in the complete frame structure of a TDD system.

Preferably, the modulation mode of the signal on the downlink channel configured by the micro cell wireless access point is the same as or different from the modulation mode of the signal received on the FDD uplink frequency band; the modulation bandwidth of the signals on the downlink channel configured by the micro cell wireless access point is the same as or different from the modulation bandwidth of the signals received on the FDD uplink frequency band.

Preferably, the downlink channel is configured in a spatial multiplexing or time division multiplexing manner according to a policy of sharing a frequency spectrum between the micro cell wireless access point and the FDD macro cell wireless access point.

Preferably, the strategy of sharing the spectrum is to maximally use an uplink spectrum of an FDD macrocell to implement downlink transmission, and then configure downlink channels of the microcell wireless access point and the macrocell wireless access point in a spatial multiplexing manner; the strategy of sharing the frequency spectrum is to use the uplink frequency spectrum of the FDD macro cell to realize downlink transmission with compromised system complexity, and then a time division multiplexing mode is adopted to configure the downlink channel of the micro cell wireless access point and the uplink channel of the macro cell wireless access point.

Preferably, the size of the time subinterval is adjusted by the network side according to the load condition of the FDD macro cell.

Preferably, the step of adjusting the size of the time sub-interval by the network side according to the load condition of the FDD macro cell includes:

and the network side obtains the uplink and downlink imbalance degree of the frequency spectrum use of the wireless access point of the FDD macro cell by taking the FDD macro cell as a unit, and adjusts the size of the time subinterval according to the imbalance degree.

Preferably, the step of obtaining, by the network side, an uplink and downlink imbalance degree of the frequency spectrum used by the FDD macrocell wireless access point, and adjusting the size of the time subinterval according to the imbalance degree includes:

the network side collects service request data reported by a terminal served by an FDD macro cell and/or current occupied data of an uplink frequency spectrum and a downlink frequency spectrum of an FDD macro cell wireless access point, calculates the proportion between the occupied quantity of the uplink frequency spectrum and the occupied quantity of the downlink frequency spectrum of the FDD macro cell wireless access point, and adjusts the size of the time subinterval according to the proportion.

Preferably, the size of the time sub-interval includes the number of time slots of an FDD macrocell radio frame or a downlink radio frame of the microcell radio access point.

Preferably, the method further comprises:

the FDD macro cell wireless access point or the micro cell wireless access point sends a measurement indication signal to a terminal which establishes a control channel with the FDD macro cell wireless access point or the micro cell wireless access point, and the indication terminal measures a downlink channel configured on an FDD uplink frequency band and an FDD duplex guard band;

after the terminal obtains the measurement result, the FDD macro cell wireless access point or the micro cell wireless access point assigns downlink channel resources for the terminal on an FDD uplink frequency band and/or an FDD duplex guard band through a control channel established by the terminal according to the measurement result reported by the terminal.

In order to solve the above technical problem, the present invention further provides a device for configuring a channel of a micro cell wireless access point, the device is located on a network side of a dual-layer wireless access network composed of the micro cell wireless access point and an FDD macro cell wireless access point, the FDD macro cell wireless access point operates on an FDD allowed frequency band, the micro cell wireless access point is deployed in a coverage area of an FDD macro cell, wherein:

the device is used for controlling the micro-cell wireless access point to configure a downlink channel in a spatial multiplexing or time division multiplexing mode on an uplink frequency spectrum used by the FDD macro-cell wireless access point in one or more time subintervals contained in one downlink radio frame period of the FDD macro-cell wireless access point, and further:

when the microcell wireless access point is controlled to configure a downlink channel in a time division multiplexing mode, the device is used for controlling the downlink channel of the microcell wireless access point and the uplink channel of the FDD macrocell wireless access point to use the FDD macrocell uplink frequency spectrum in the time division multiplexing mode;

when the microcell wireless access point is controlled to configure the downlink channel in a spatial multiplexing mode, the device is used for controlling the downlink channel of the microcell wireless access point and the downlink channel of the FDD macrocell wireless access point to use the FDD macrocell uplink frequency spectrum in a spatial multiplexing mode.

Preferably, the apparatus is configured to control the micro-cell wireless access point to configure a first transmit channel on an uplink spectrum belonging to the FDD macro-cell wireless access point, and configure a second transmit channel on an FDD duplex protection band; and the first transmission channel and the second transmission channel simultaneously transmit signals to a cell served by the microcell wireless access point on respective used frequency spectrums.

Preferably, the apparatus is configured to control the micro-cell wireless access point to be configured between a downlink channel on the FDD macro-cell uplink spectrum and an uplink channel on the FDD macro-cell uplink spectrum, to operate in a time division multiplexing manner, and to control the micro-cell wireless access point to configure the downlink channel on the FDD macro-cell uplink spectrum to transmit signals to the terminal served by the micro-cell wireless access point only on time-frequency resources vacated by the FDD uplink channel.

Preferably, the apparatus is configured to control, in the time sub-interval, the micro-cell wireless access point to configure a downlink channel on an FDD duplex guard band used by the FDD macro-cell access point, and transmit a signal to a terminal served by the micro-cell wireless access point simultaneously with a downlink channel configured by the micro-cell wireless access point on an uplink spectrum of the FDD macro-cell wireless access point.

Preferably, the apparatus is configured to control the micro-cell wireless access point to configure a downlink channel on the FDD macro-cell access point uplink spectrum, and transmit a signal to each serving terminal in the time sub-interval by using the same frequency or by using a frequency overlapping with the frequency of the FDD macro-cell wireless access point on the FDD macro-cell uplink spectrum.

Preferably, the apparatus is configured to control, in the time sub-interval, the micro-cell wireless access point to transmit a signal to a terminal served by the micro-cell wireless access point simultaneously on a downlink channel configured by the FDD downlink frequency band used by the FDD macro-cell access point and on an uplink frequency spectrum configured by the micro-cell wireless access point.

Preferably, the apparatus is configured to control that a downlink channel configured by the micro-cell wireless access point on the uplink spectrum of the FDD macro-cell and a time-frequency resource occupied by a downlink channel on the FDD duplex guard band are the same or overlap portions exist in time and frequency.

Preferably, the apparatus is configured to control the downlink channel configured by the micro-cell wireless access point on the uplink spectrum of the FDD macro-cell and the downlink channel on the FDD duplex guard band to be carried in the same time slot on the same radio frame, or on a time slot occurring simultaneously on different radio frames where time slot synchronization is maintained.

Preferably, the apparatus is configured to control that a downlink channel configured by the micro-cell wireless access point on the uplink spectrum of the FDD macro-cell is the same as a time-frequency resource occupied by a downlink channel on the FDD duplex guard band as described below or has an overlapping portion in time and frequency:

a duplex guard band located intermediate the uplink and downlink paired bands allocated for use by the FDD system but not belonging to a Time Division Duplex (TDD) licensed band;

or,

and the FDD uplink and downlink duplex guard band is positioned between the uplink frequency band and the downlink frequency band which are allocated to the FDD system and belongs to the TDD licensed frequency band.

Preferably, the duplex guard band which is located between the uplink and downlink paired bands allocated to the FDD system, but does not belong to the TDD licensed band, includes the duplex guard band located in the middle of the 790-862 MHz band allocated to the LTE FDD system;

and the FDD uplink and downlink duplex protection frequency band is located between the uplink frequency band and the downlink frequency band which are allocated to the FDD system and belongs to the TDD licensed frequency band, and comprises the duplex protection frequency band in the middle of 2500-2690 MHz.

Preferably, the apparatus is for controlling a transmitter configured to transmit signals by two or more physically independent radio frequency transmission channels; or, for controlling the transmission of signals configured to be transmitted by one radio frequency transmission channel designed uniformly in physical.

Preferably, the apparatus is configured to control and configure to transmit signals by two or more physically independent radio frequency transmission channels, and includes configuring to respectively implement signal transmission on an FDD macrocell uplink spectrum and an FDD duplex guard band by two or more physically independent radio frequency transmission channels using respective independent power amplifiers, each transmitting its own physical carrier; the device is used for controlling a radio frequency transmitting channel which is designed in a unified way in physics to transmit signals, and comprises a radio frequency transmitting channel which is designed in a unified way in physics and used for realizing signal transmission on an FDD uplink frequency band and an FDD duplex guard band by using the same power amplifier, and transmitting independent physical carriers on the FDD uplink frequency band and the FDD duplex guard band respectively, or transmitting signals which are modulated by the same physical carrier on the FDD uplink frequency band and the FDD duplex guard band.

Preferably, the radio frame structure used by the apparatus for controlling the downlink channel configured by the micro cell radio access point is configured as follows:

Preferably, the device is configured to control a modulation method of a signal on the downlink channel configured by the micro cell wireless access point to be the same as or different from a modulation method of a signal received on an FDD uplink frequency band; and the modulation bandwidth of the signal on the downlink channel configured by the microcell wireless access point is controlled to be the same as or different from the modulation bandwidth of the signal received on the FDD uplink frequency band.

Preferably, the apparatus is configured to determine to configure the downlink channel in a spatial multiplexing or time division multiplexing manner according to a policy of sharing a spectrum between the micro cell wireless access point and the FDD macro cell wireless access point.

Preferably, the strategy of the device for sharing the spectrum is to use the uplink spectrum of the FDD macrocell to the maximum extent to realize downlink transmission, and control to configure the downlink channels of the microcell wireless access point and the macrocell wireless access point in a spatial multiplexing manner; the strategy of the device for sharing the frequency spectrum is to realize downlink transmission by using the uplink frequency spectrum of the FDD macro cell with compromised system complexity, and control to configure the downlink channel of the micro cell wireless access point and the uplink channel of the macro cell wireless access point in a time division multiplexing mode.

Preferably, the apparatus is configured to adjust the size of the time subinterval according to a load condition of the FDD macro cell.

Preferably, the apparatus is configured to obtain, by taking an FDD macro cell as a unit, an uplink and downlink imbalance degree of spectrum usage of the FDD macro cell wireless access point, and adjust the size of the time subinterval according to the imbalance degree.

Preferably, the device is configured to collect service request data reported by a terminal served by an FDD macro cell and/or current data of occupation of an uplink spectrum and a downlink spectrum of an FDD macro cell wireless access point, calculate a ratio between an occupation amount of the uplink spectrum and an occupation amount of the downlink spectrum of the FDD macro cell wireless access point, and adjust the size of the time sub-interval according to the ratio.

Compared with the prior art, the technical scheme of the invention realizes the technology that the micro-cell wireless access point increases the downlink transmission bandwidth of the layered wireless access network by utilizing the FDD duplex guard band and/or utilizing the spatial multiplexing of the downlink channel of the micro-cell wireless access point to the frequency spectrum of the macro-cell wireless access point.

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

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a flowchart illustrating a method for configuring a channel of a micro cell wireless access point according to an embodiment of the present invention;

fig. 2(a) is a schematic diagram of an implementation method for configuring a downlink channel of a micro cell wireless access point in a time division multiplexing manner according to the present invention;

fig. 2(b) is a schematic diagram of an implementation method for configuring downlink channels of a microcell wireless access point in a spatial multiplexing frequency manner according to the present invention;

fig. 3 is a schematic diagram of a specific process of collecting data according to the present invention for the degree of uplink and downlink imbalance of the spectrum usage of the macro cell wireless access point;

fig. 4 is a schematic diagram of a system for using an FDD macrocell uplink spectrum and an FDD duplex guard band for downlink transmission according to an embodiment of the present invention;

fig. 5(a) and 5(b) are schematic diagrams of configuring a microcell downlink channel on a 791 MHz-862 MHz band in accordance with the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

First, embodiments of the present invention and combinations of features in the embodiments with each other are within the scope of the present invention, if not conflicting. Additionally, the steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions and, although a logical order is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than here.

Embodiment one, method for configuring channel of micro cell wireless access point

The method and the device are suitable for configuring the downlink channel for the micro-cell wireless access point using the FDD macro-cell uplink frequency spectrum and the FDD guard band, and improve the downlink transmission capability of the double-layer wireless access network consisting of the micro-cell wireless access point and the FDD macro-cell wireless access point. As shown in fig. 1, the present embodiment mainly includes the following steps:

in one or more (as not specifically described, in the present invention, "a plurality" indicates "two or more") time subintervals included in one downlink radio frame period of an FDD macrocell radio access point in an FDD macrocell covering a microcell radio access point, a microcell radio access point configures a downlink channel in one of two manners, i.e., spatial multiplexing or time multiplexing, on an uplink spectrum used by the FDD macrocell radio access point (shown as step S110 in the figure), where:

when the micro-cell wireless access point configures a downlink channel in a time division multiplexing manner, the downlink channel of the micro-cell wireless access point and the uplink channel of the FDD macro-cell wireless access point use the FDD macro-cell uplink spectrum in a time division multiplexing manner (shown as step S120 in the figure);

when the microcell wireless access point configures the downlink channel in a spatial multiplexing manner, the downlink channel of the microcell wireless access point and the downlink channel of the FDD macrocell wireless access point use the FDD macrocell uplink spectrum in a spatial multiplexing manner (shown in the figure as step S130).

Referring to fig. 2(a), the implementation method for configuring the downlink channel of the micro-cell wireless access point in a time division multiplexing manner may be one of the following methods:

(1) the micro-cell wireless access point is configured between a downlink channel 201 on an FDD macro-cell uplink frequency spectrum and an uplink channel 204 on the FDD macro-cell uplink frequency spectrum, and works in a time division multiplexing mode, and the micro-cell wireless access point is configured on the downlink channel 201 on the FDD macro-cell uplink frequency spectrum and only transmits signals to a terminal served by the micro-cell wireless access point on time-frequency resources vacated by the FDD uplink channel;

(2) the micro-cell wireless access point is configured between a downlink channel 201 on an uplink frequency spectrum of an FDD macro-cell and an uplink channel 204 on the uplink frequency spectrum of the FDD macro-cell, and works in a time division multiplexing mode, the downlink channel 201 of the micro-cell wireless access point configured on the uplink frequency spectrum of the FDD macro-cell only transmits signals to a terminal served by the micro-cell wireless access point in a time sub-interval on time-frequency resources vacated by the FDD uplink channel, and in the time sub-interval, the downlink channel 202 of the micro-cell wireless access point configured on an FDD duplex guard band used by the FDD macro-cell access point and the downlink channel 201 of the micro-cell wireless access point configured on the uplink frequency spectrum of the FDD macro-cell wireless access point transmit signals to the terminal served by the micro-cell wireless access point simultaneously.

When the method (2) is used to implement configuring the downlink channel of the micro-cell wireless access point in a time division multiplexing manner, the micro-cell wireless access point configures the downlink channel 202 on the FDD duplex guard band used by the FDD macro-cell access point, and transmits a signal to a terminal served by the micro-cell wireless access point simultaneously with the downlink channel 201 configured by the micro-cell wireless access point on the uplink spectrum of the FDD macro-cell wireless access point, which is specifically implemented as follows:

the time-frequency resources occupied by the downlink channel 201 configured on the uplink spectrum of the FDD macrocell and the downlink channel 202 on the FDD duplex guard band are the same or overlap in time and frequency. Specifically, for example, the downlink channel 201 configured on the uplink spectrum of the FDD macrocell and the downlink channel 202 on the FDD duplex guard band may be carried in the same time slot on the same radio frame, or carried in a time slot that occurs simultaneously on different radio frames that maintain time slot synchronization.

Referring to fig. 2(b), the method for configuring the downlink channel of the microcell wireless access point in a spatial multiplexing frequency manner may be one of the following methods:

(1) a downlink channel 201 configured by a micro-cell wireless access point on the uplink spectrum of the FDD macro-cell access point and a downlink channel 205 configured by an FDD macro-cell wireless access point on the uplink spectrum of the FDD macro-cell simultaneously use the same frequency or simultaneously use the frequency with overlapping on the frequency to transmit signals to the respective served terminals in the time subinterval;

(2) the downlink channel 201 of the micro-cell wireless access point configured on the uplink spectrum of the FDD macro-cell wireless access point uses the same frequency or uses the frequency overlapping with the frequency of the downlink channel 205 of the FDD macro-cell wireless access point configured on the uplink spectrum of the FDD macro-cell wireless access point, and transmits signals to the terminal served by the micro-cell wireless access point in the time subinterval, and the downlink channel 206 of the micro-cell wireless access point configured on the FDD duplex guard band used by the FDD macro-cell access point in the time subinterval transmits signals to the terminal served by the micro-cell wireless access point simultaneously with the downlink channel 201 of the micro-cell wireless access point configured on the uplink spectrum of the FDD macro-cell wireless access point.

(3) A downlink channel 201 configured by a micro-cell wireless access point on an uplink spectrum of the FDD macro-cell wireless access point, and a downlink channel 205 configured by the FDD macro-cell wireless access point on the uplink spectrum of the FDD macro-cell wireless access point use the same frequency or use the frequency overlapping with the frequency domain to transmit signals to the terminal served by the micro-cell wireless access point in the time sub-interval, and in the time sub-interval, a downlink channel 203 configured by the micro-cell wireless access point on the FDD downlink frequency band used by the FDD macro-cell access point and a downlink channel 201 configured by the micro-cell wireless access point on the uplink spectrum of the FDD macro-cell wireless access point transmit signals to the terminal served by the micro-cell wireless access point at the same time;

when the method (2) is used to implement that the downlink channel of the microcell wireless access point is configured in a spatial multiplexing manner with the macrocell wireless access point, the microcell wireless access point configures the downlink channel 202 on the FDD duplex guard band used by the FDD macrocell access point, and transmits a signal to a terminal served by the microcell wireless access point simultaneously with the downlink channel 201 configured by the microcell wireless access point on the uplink spectrum of the FDD macrocell wireless access point, which specifically implements the following steps:

The FDD duplex guard band may be one of the following bands:

(1) a duplex guard band located intermediate the uplink and downlink paired bands allocated for use by the FDD system but not belonging to a Time Division Duplex (TDD) licensed band; for example, in the duplex guard band in the middle of the 790-862 MHz band allocated to the LTE FDD system: 821 MHz-832 MHz;

(2) the FDD uplink and downlink duplex guard band is positioned between the uplink frequency band and the downlink frequency band which are allocated to the FDD system and belongs to the TDD licensed frequency band; for example, the middle duplex guard band of 2500-2690 MHz: 2570 MHz-2620 MHz.

The time sub-interval in the downlink radio frame period may be included in a complete FDD downlink radio frame period, and the duration of the time sub-interval is less than a time sub-interval of the FDD downlink radio frame period.

The downlink channel of the microcell can be a traffic channel and/or a control channel

The specific configuration method for configuring the downlink channel may be one of the following methods:

(1) two or more physically independent radio frequency transmitting channels transmit signals on the frequency spectrum resources and the time subintervals, namely, the independent power amplifiers are used for respectively realizing the signal transmission on the uplink frequency spectrum of the FDD macro cell and the FDD duplex guard band, and the independent power amplifiers respectively transmit own physical carriers;

(2) a radio frequency transmitting channel which is designed in a physically unified way transmits signals on the frequency spectrum resources and the time subintervals, namely, the same power amplifier is used for realizing the signal transmission on an FDD uplink frequency band and an FDD duplex guard band, and independent physical carriers are respectively transmitted on the FDD uplink frequency band and the FDD duplex guard band;

(3) and a radio frequency transmission channel which is designed uniformly in physics transmits signals on the frequency spectrum resource and the time subinterval, the same power amplifier is used for realizing signal transmission on an FDD uplink frequency band and an FDD duplex guard band, and signals modulated by the same physical carrier wave are transmitted on the FDD uplink frequency band and the FDD duplex guard band.

The downlink channel of the microcell wireless access point configured on the uplink spectrum of the FDD macrocell, using a radio frame structure, may be configured as one of the following manners:

(1) the method comprises the steps that a part of time slots in a complete downlink frame structure of an FDD system are formed;

(2) consists of time slots configured for downlink transmission in the complete frame structure of a TDD system.

The modulation method of the signal on the downlink channel of the microcell wireless access point configured on the uplink spectrum of the FDD macrocell may be the same as or different from the modulation method of the signal received on the FDD uplink frequency band.

The modulation bandwidth of the signal on the downlink channel of the microcell wireless access point configured on the uplink spectrum of the FDD macrocell may be the same as or different from the modulation bandwidth of the signal received on the FDD uplink frequency band.

The determination of configuring the downlink channel in the spatial multiplexing or time division multiplexing manner may be determined according to a policy of sharing a spectrum between the micro cell wireless access point and the FDD macro cell wireless access point. And if the strategy of sharing the frequency spectrum is to maximally use the uplink frequency spectrum of the FDD macro cell to realize downlink transmission, configuring downlink channels of the micro cell wireless access point and the macro cell wireless access point in a spatial multiplexing mode. If the strategy of sharing the frequency spectrum uses the uplink frequency spectrum of the FDD macro cell to realize downlink transmission with compromised system complexity, a time division multiplexing mode is adopted to configure a downlink channel of a micro cell wireless access point and an uplink channel of a macro cell wireless access point; in this way, the FDD macrocell radio access point does not need to configure a transmitter on its uplink spectrum, and interference between the downlink channels of the macrocell and the microcell is simplified.

The size of the time subinterval may be adjusted by a spectrum sharing management unit on the network side according to a load condition of the FDD macrocell, and specifically, the spectrum sharing management unit collects data of an uplink and downlink imbalance degree of spectrum usage of the FDD macrocell wireless access point in units of the FDD macrocell, and adjusts the size of the time subinterval according to the collected imbalance degree.

As shown in fig. 3, the specific process of the spectrum sharing management unit collecting data of the unbalanced uplink and downlink spectrum used by the macro cell wireless access point may include the following steps:

step S310, a frequency spectrum sharing management unit collects service request data reported by a terminal served by an FDD macro cell and/or occupied data of an uplink frequency spectrum and a downlink frequency spectrum of a wireless access point of the current FDD macro cell; the service represented by the service request data reported by the terminal can be a service already admitted and/or a service waiting for admission;

step S320, the frequency spectrum sharing management unit calculates the proportion between the uplink frequency spectrum occupation amount and the downlink frequency spectrum occupation amount of the FDD macro cell wireless access point;

in step S330, the spectrum sharing management unit adjusts the size of the time sub-interval according to the ratio between the uplink and downlink spectrum occupancy amounts of the FDD macro-cell wireless access point, where the size of the time sub-interval may be the number of time slots of the FDD macro-cell wireless frame or the downlink wireless frame of the micro-cell wireless access point.

Further, the spectrum sharing management unit may transmit the time sub-interval adjustment information to the micro cell wireless access point.

After the downlink channel configuration is completed by using the method for configuring the channel for the microcell wireless access point, further, the downlink channel resource may be configured for the terminal according to the following steps:

an FDD macro cell wireless access point or a micro cell wireless access point sends a measurement indication signal to a terminal which establishes a control channel with the FDD macro cell wireless access point or the micro cell wireless access point, and the indication terminal measures a downlink channel configured on an FDD uplink frequency band and an FDD duplex guard band;

and step (II), after the terminal obtains the measurement result, the FDD macro cell wireless access point or the micro cell wireless access point assigns downlink channel resources for the terminal on an FDD uplink frequency band and/or an FDD duplex protection frequency band through a control channel established by the terminal according to the measurement result reported by the terminal.

Application example I, method for configuring downlink channel for microcell wireless access point working on 790 MHz-862 MHz frequency band

In the 790MHz to 862MHz frequency band in germany, 3 LTE FDD systems of three operators are deployed, where:

the FDD paired band with 10MHz bandwidth owned by the first operator is: the downlink is 791-801 MHz, and the uplink is 832-842 MHz;

the FDD paired band with bandwidth of 10MHz owned by the second operator is: the downlink ranges from 801MHz to 811MHz, and the uplink ranges from 842MHz to 852 MHz;

the FDD paired bands with bandwidth of 10MHz owned by the third operator are: the downlink is 811-821 MHz, and the uplink is 852-862 MHz;

the 11MHz bandwidth between 821MHz and 832MHz is a duplex guard band which is not allocated for the uplink and downlink receiving and transmitting isolation of the FDD system.

A first operator deploys a downlink channel of a micro-cell wireless node on an uplink frequency spectrum of an FDD paired frequency spectrum, such as the downlink 791-801 MHz and the uplink 832-842 MHz, owned by the first operator and a transmitting-receiving isolated guard band of an 11MHz bandwidth between 821MHz and 832 MHz. And, the uplink spectrum of the FDD macrocell is used between the microcell and the macrocell in a time division manner, that is, in a first time sub-interval, the FDD macrocell receives signals from the terminal on the uplink spectrum, in a second time sub-interval, the uplink spectrum of the FDD macrocell wireless access point is idle, and in this time sub-interval, the microcell wireless access point deploys the downlink channel 201 on the uplink spectrum of the FDD macrocell. In addition, the micro-cell wireless access point also configures a downlink channel 202 on the FDD duplex protection band, and the frequency of the downlink channel 202 is different from that of the downlink channel 201, but the working time of the downlink channel 202 is overlapped or the same.

The microcell wireless access point may be one of the following:

(1) configuring a receiving and transmitting channel facing to a micro cell on a TDD (time division duplex) licensed frequency band, and configuring a micro cell base station or a wireless gateway of a downlink channel on a receiving and transmitting isolated protection band with 11MHz bandwidth between uplink 832-842 MHz and uplink 821 MHz-832 MHz;

(2) configuring a receiving and transmitting channel facing to the microcell on an FDD allowed frequency band outside a 790 MHz-862 MHz frequency band, and configuring a microcell base station or a wireless gateway of a downlink channel on a receiving and transmitting isolated guard band of an 11MHz bandwidth between uplink 832-842 MHz and uplink 821 MHz-832 MHz;

the second operator deploys the downlink channel 201 of the micro-cell wireless node on the uplink spectrum of an FDD paired spectrum, such as 842-852 MHz, owned by the second operator, and shares the uplink 842-852 MHz band with the downlink channel 205 of the macro-cell working on the uplink frequency band in a spatial multiplexing mode;

the third operator deploys the downlink channel 201 of the micro-cell wireless node on the uplink spectrum of an FDD paired spectrum, such as 842-852 MHz, owned by the third operator, and shares the frequency band with the downlink channel 205 of the macro-cell working on the uplink frequency band and the downlink channel 203 working on the FDD downlink frequency band in a spatial multiplexing manner.

Further, to avoid adjacent channel interference between different operators, downlink channels of the micro cells deployed by the three operators on the uplink frequency band of the FDD macro cell are operated synchronously, that is, the starting times of radio frames used by the downlink channels of the micro cell wireless nodes of the three operators are the same.

Second embodiment, device for configuring micro-cell wireless access point channel

Correspondingly to the method described in the first embodiment, the apparatus in this embodiment is located on the network side of a dual-layer radio access network composed of a micro-cell radio access point 301 and an FDD macro-cell radio access point 302, where the FDD macro-cell radio access point 302 operates on an FDD allowed frequency band, and the micro-cell radio access point 302 is deployed in the coverage area of an FDD macro-cell, where:

the apparatus is configured to control the micro-cell wireless access point 301 to configure a downlink channel in a spatial multiplexing or time division multiplexing manner on an uplink spectrum used by the FDD macro-cell wireless access point 302 in one or more time subintervals included in one downlink radio frame period of the FDD macro-cell wireless access point 302, and:

when the micro-cell wireless access point 301 configures a downlink channel in a time division multiplexing manner, controlling the downlink channel of the micro-cell wireless access point 301 and an uplink channel of the FDD macro-cell wireless access point 302 to use an FDD macro-cell uplink frequency spectrum in a time division multiplexing manner;

when the micro-cell wireless access point 301 configures the downlink channel in a spatial multiplexing manner, the downlink channel of the micro-cell wireless access point 301 and the downlink channel of the FDD macro-cell wireless access point 302 are controlled to use the FDD macro-cell uplink frequency spectrum in a spatial multiplexing manner.

The apparatus in this embodiment is configured to control a micro cell wireless access point 301 to configure a first transmit channel on an uplink spectrum belonging to an FDD macro cell wireless access point 302, and configure a second transmit channel on an FDD duplex protection band; and, the first transmission channel and the second transmission channel simultaneously transmit signals to the cell served by the microcell wireless access point 301 on the respective used frequency spectrums.

The apparatus in this embodiment is configured to control the micro-cell wireless access point 301 to be configured between a downlink channel on an uplink spectrum of the FDD macro-cell and an uplink channel on an uplink spectrum of the FDD macro-cell, and to operate in a time division multiplexing manner, and to control the micro-cell wireless access point 301 to configure the downlink channel on the uplink spectrum of the FDD macro-cell to transmit a signal to a terminal served by the micro-cell wireless access point 301 only on a time-frequency resource vacated by the FDD uplink channel.

The apparatus in this embodiment controls, in a time sub-interval, a micro-cell wireless access point 301 to configure a downlink channel on an FDD duplex guard band used by an FDD macro-cell access point, and transmit a signal to a terminal served by the micro-cell wireless access point 301 simultaneously with a downlink channel, which is configured by the micro-cell wireless access point 301 on an uplink spectrum of an FDD macro-cell wireless access point 302.

The apparatus in this embodiment is configured to control a downlink channel, which is configured by the micro-cell wireless access point 301 on the uplink spectrum of the FDD macro-cell access point, to transmit a signal to a terminal serving each of the terminals in a time subinterval, using the same frequency or using a frequency overlapping with the frequency, at the same time as the downlink channel, which is configured by the FDD macro-cell wireless access point 302 on the uplink spectrum of the FDD macro-cell.

The apparatus in this embodiment is configured to control, in a time sub-interval, a micro-cell wireless access point 301 to configure a downlink channel on an FDD duplex guard band used by an FDD macro-cell access point, and transmit a signal to a terminal served by the micro-cell wireless access point 301 simultaneously with a downlink channel, which is configured by the micro-cell wireless access point 301 on an uplink spectrum of an FDD macro-cell wireless access point 302.

The apparatus in this embodiment is configured to control, in a time sub-interval, a downlink channel of the micro-cell wireless access point 301, which is configured on an FDD downlink frequency band used by the FDD macro-cell access point, and a downlink channel of the micro-cell wireless access point 301, which is configured on an uplink frequency spectrum of the FDD macro-cell wireless access point 302, to transmit signals to a terminal served by the micro-cell wireless access point 301 at the same time.

The apparatus in this embodiment is configured to control a downlink channel configured by the micro-cell wireless access point 301 on the uplink spectrum of the FDD macro-cell to occupy the same time-frequency resources as or overlap with time and frequency resources occupied by the downlink channel on the FDD duplex guard band.

The apparatus in this embodiment is configured to control a micro-cell wireless access point 301 to configure a downlink channel on an uplink spectrum of an FDD macro-cell and a downlink channel on an FDD duplex guard band in the same time slot on the same radio frame, or to carry on a bearer on a time slot that occurs simultaneously on different radio frames that keep time slot synchronization.

The apparatus in this embodiment is configured to control a downlink channel, which is configured by the micro-cell wireless access point 301 on the uplink spectrum of the FDD macro-cell, to be the same as a time-frequency resource occupied by a downlink channel on the following FDD duplex guard band, or to have overlapping portions in time and frequency:

or,

The duplex guard band which is located between the paired uplink and downlink frequency bands allocated to the FDD system and does not belong to the TDD licensed frequency band comprises the duplex guard band located in the middle of the 790-862 MHz frequency band allocated to the LTE FDD system;

the FDD uplink and downlink duplex guard band which is located between the uplink frequency band and the downlink frequency band allocated to the FDD system and belongs to the TDD licensed frequency band comprises a duplex guard band in the middle of 2500-2690 MHz.

The apparatus in this embodiment is configured to control a transmitter configured to transmit signals from two or more physically independent radio frequency transmit channels; or, for controlling the transmission of signals configured to be transmitted by one radio frequency transmission channel designed uniformly in physical.

The apparatus in this embodiment is configured to control two or more physically independent radio frequency transmission channels to transmit signals, and includes a configuration in which two or more physically independent radio frequency transmission channels respectively implement signal transmission on an FDD macrocell uplink spectrum and an FDD duplex guard band using respective independent power amplifiers, and each transmits its own physical carrier.

The apparatus in this embodiment is configured to control a radio frequency transmission channel designed physically in a unified manner to transmit signals, and includes a configuration that a radio frequency transmission channel designed physically in a unified manner uses the same power amplifier to implement signal transmission on an FDD uplink frequency band and an FDD duplex guard band, and separate physical carriers are transmitted on the FDD uplink frequency band and the FDD duplex guard band, respectively, or signals modulated by the same physical carrier are transmitted on the FDD uplink frequency band and the FDD duplex guard band.

The apparatus in this embodiment is configured to control a radio frame structure used by a downlink channel configured by the picocell radio access point 301, as follows:

the method comprises the steps that a part of time slots in a complete downlink frame structure of an FDD system are formed;

or, it is formed by time slots configured for downlink transmission in the complete frame structure of a TDD system.

The apparatus in this embodiment is configured to control a modulation method of a signal on a downlink channel configured by the micro cell wireless access point 301 to be the same as or different from a modulation method of a signal received on an FDD uplink frequency band; and is also used to control that the modulation bandwidth of the signal on the downlink channel configured by the microcell wireless access point 301 is the same as or different from the modulation bandwidth of the signal received on the FDD uplink frequency band.

The apparatus in this embodiment is configured to determine to configure a downlink channel in a spatial multiplexing or time division multiplexing manner according to a policy of sharing a spectrum between the micro cell wireless access point 301 and the FDD macro cell wireless access point 302.

In the apparatus in this embodiment, the strategy for sharing the spectrum is to maximally use the uplink spectrum of the FDD macrocell to implement downlink transmission, and control downlink channels of the microcell wireless access point 301 and the macrocell wireless access point 302 to be configured in a spatial multiplexing manner.

In the apparatus in this embodiment, the strategy for sharing the spectrum is to use the uplink spectrum of the FDD macrocell to implement downlink transmission with compromised system complexity, and control the downlink channel of the microcell wireless access point 301 and the uplink channel of the macrocell wireless access point 302 to be configured in a time division multiplexing manner.

The apparatus in this embodiment is configured to adjust the size of the time sub-interval according to a load condition of the FDD macro cell.

The apparatus in this embodiment is configured to obtain, in units of an FDD macrocell, an uplink and downlink imbalance degree of spectrum usage of the FDD macrocell wireless access point 302, and adjust the size of the time subinterval according to the imbalance degree.

The apparatus in this embodiment is configured to collect service request data reported by a terminal served by an FDD macro cell and/or current data of occupancy of an uplink spectrum and a downlink spectrum of an FDD macro cell wireless access point 302, calculate a ratio between an occupancy amount of the uplink spectrum and an occupancy amount of the downlink spectrum of the FDD macro cell wireless access point 302, and adjust a size of a time sub-interval according to the ratio.

In the apparatus in this embodiment, the size of the time sub-interval includes the number of time slots of an FDD macrocell wireless frame or a downlink wireless frame of the microcell wireless access point 301.

The embodiment can realize a double-layer wireless access network system which uses the FDD macro cell uplink frequency spectrum and the FDD duplex guard band for downlink transmission. As shown in fig. 4, the system implemented by the present embodiment mainly includes:

at least one FDD macrocell radio access point 302 operating on an FDD licensed frequency band;

at least one micro-cell wireless access point 301 configured with a downlink channel on an uplink frequency spectrum of an FDD frequency band and an FDD duplex guard band, wherein the micro-cell wireless access point is deployed in the coverage of an FDD macro-cell;

a spectrum sharing management unit 303 disposed on the network side, where the spectrum sharing management unit 303 is the apparatus in the second embodiment;

one or more terminals 304 served by macro cells and/or micro cells.

In this system, the FDD macrocell wireless access point 302 operates on a pair of frequency spectrums licensed to the FDD, and the uplink frequency spectrums in the pair of frequency spectrums are used in a spatial multiplexing manner for the downlink channels of the FDD macrocell wireless access point and the downlink channels of the microcell wireless access point, or in a time-division multiplexing manner for the uplink channels of the FDD macrocell wireless access point and the downlink channels of the microcell wireless access point.

The micro cell wireless access point 301 configures a transmit channel on the uplink spectrum in the FDD licensed band and on the FDD duplex guard band.

Specifically, the micro cell wireless access point 301 configures a first transmit channel on an uplink frequency spectrum belonging to the FDD macro cell wireless access point 302, and configures a second transmit channel on an FDD duplex protection band; and, the first transmit channel and the second transmit channel simultaneously transmit signals to their serving cells on the respective used frequency spectrum.

Further, in a first time sub-interval in an uplink radio frame period on an uplink spectrum used by the FDD macrocell radio access point 302, the FDD macrocell radio access point 302 receives a signal on the uplink spectrum used by the FDD macrocell; or,

the micro cell wireless access point 301 receives signals on an uplink frequency spectrum used by the FDD macro cell;

in a second time subinterval in the uplink radio frame period used by the FDD macrocell wireless access point 302, the first transmit channel and the second transmit channel configured by the microcell wireless access point 301 transmit signals to the served microcells at the same time.

The first time sub-interval in the uplink radio frame period may be included in a time sub-interval of a complete FDD uplink radio frame period, and the duration of the first time sub-interval is less than a time sub-interval of an FDD downlink radio frame period.

The second time subinterval in the uplink radio frame period may be included in a time subinterval of a complete FDD uplink radio frame period, and may have a duration less than a time subinterval of an FDD downlink radio frame period.

The terminal 304 accesses the communication system capable of adjusting the ratio of uplink and downlink spectrum resources from the micro cell wireless access point 301 or the FDD macro cell wireless access point 302, and sends service request information to the network side through the micro cell wireless access point 301 or the FDD macro cell wireless access point 302.

The micro-cell wireless access point 301 or the FDD macro-cell wireless access point 302 assigns downlink traffic channel resources to the terminal 304 on the uplink frequency spectrum of the FDD licensed frequency band and/or the FDD guard frequency band.

The spectrum sharing management unit 303 on the network side counts the uplink and downlink imbalance degree of the current service of the FDD macro cell wireless access point 302 and the micro cell wireless access point 301, and adjusts the size of the second time subinterval according to the uplink and downlink imbalance degree of the current service.

The method for the spectrum sharing management unit 303 to count the uplink and downlink imbalance degree of the current service may include the following steps:

step (a), taking a macro cell as a unit, and respectively collecting data of uplink and downlink imbalance degrees of current services of a wireless access point of the macro cell; specifically, service request data reported by a terminal 304 served by an FDD macrocell and/or occupied data of an uplink spectrum and a downlink spectrum of a current FDD macrocell wireless access point 302 are collected; the current service may be a service that has been admitted and/or a service waiting to be admitted;

step (b), calculating the ratio between the uplink and downlink spectrum occupation amount and the uplink and downlink spectrum occupation amount of the FDD macro cell wireless access point 302;

and (c) adjusting the occupied proportion of the second time subinterval in the radio frame period on the FDD uplink frequency band based on the occupied proportion of the uplink and downlink frequency spectrums of the FDD macro cell wireless access point 302.

Further, in order to achieve the same or close proportion between the uplink and downlink spectrum occupancy amounts between the macro cell and the micro cell, the following measures can be further taken:

scheduling or switching traffic flows for the terminal 304 between the macro cell and the micro cell;

or, spatial spectrum multiplexing is implemented between the macrocell wireless access point and the microcell wireless access point 301, and the spatial spectrum multiplexing between the specific macrocell and the microcell is one of the following manners:

(1) while the macrocell wireless access point transmits signals to its served terminals 304, the microcell wireless access point 301 receives signals from its served terminals 304;

(2) while the macrocell wireless access point receives signals from its served terminals 304, the microcell wireless access point 301 transmits signals to its served terminals 304.

The specific process of adjusting the size of the second time sub-interval according to the uplink and downlink imbalance degree of the current service may be:

the spectrum sharing management unit 303 determines whether the currently available downlink spectrum of the FDD macrocell wireless access point 302 is greater than spectrum resources required by the currently admitted downlink service and the currently requested downlink service under the current value-taking condition of the first time subinterval, and if so, does not adjust the size of the second time subinterval; if the value is less than or equal to the predetermined value, performing further judgment as follows;

the spectrum sharing management unit 303 determines whether the FDDFDD uplink spectrum can further give a spectrum to the downlink service, and if the FDDFDD uplink spectrum can give the spectrum to the downlink service, and the spectrum resource that can give the spectrum to the FDDFDD uplink spectrum is greater than the width of one radio frame timeslot on the radio frame, the spectrum sharing management unit 303 sends uplink and downlink spectrum resource ratio adjustment information to the macrocell wireless access point, or sends the uplink and downlink spectrum resource ratio adjustment information to the FDD macrocell wireless access point 302 and/or the microcell wireless access point 301, where the uplink and downlink spectrum resource ratio adjustment information indicates an amount of time for adjusting the second time subinterval, for example, the amount of time for adjusting the second time subinterval is the number of timeslots of the FDD macrocell wireless frame or the microcell wireless.

Application example two, system for using FDD macro cell uplink frequency spectrum and FDD duplex guard band for downlink transmission

Please refer to the embodiment shown in fig. 4, the schematic diagram of the application example shown in fig. 5(a) illustrating the usage of the FDD uplink and downlink spectrum in the first time sub-interval, and the schematic diagram of fig. 5(b) illustrating the application configuring the downlink channel of the micro-cell wireless access point on the FDD macro-cell uplink spectrum and the FDD duplex guard band in the second time sub-interval.

In this application example, the FDD macrocell wireless access point 302 operating on an FDD licensed frequency band uses the following frequency spectrum: the FDD paired bands are: descending 791-801 MHz; ascending 832-842 MHz; it is mainly composed of antennas, RRU 302a and BBU 302 b.

In this application example, the micro-cell wireless access point 301, which is configured with a downlink channel on an uplink frequency spectrum of an FDD frequency band and an FDD duplex guard frequency band, is deployed within the coverage of an FDD macro-cell, where the uplink frequency spectrum of the FDD frequency band is 832-842 MHz, and the FDD duplex guard frequency band is 821-832 MHz.

The spectrum sharing management unit 303 disposed on the network side may be designed integrally with the BBU 302b, or may be implemented as a physical network element different from the BBU 302 b.

At least one terminal 304 served by a macro cell and/or a micro cell, having the capability of receiving signals on an FDD uplink frequency band, wherein the FDD uplink frequency band is 832-842 MHz, and on an 11MHz band between 821 MHz-832 MHz.

The spectrum sharing management unit 303 collects uplink and downlink spectrum usage data of each FDD macrocell or sector from the BBU 302b, compares the collected uplink spectrum usage values with the maximum available uplink and/or downlink spectrum of the corresponding cell in the case of using a symmetric spectrum, judging whether the uplink frequency spectrum is idle or not under the condition that the downlink frequency spectrum can not meet the requirement of downlink service, if there is an idle uplink spectrum, the size of the time-frequency resource available for the downlink spectrum is calculated, and then, the spectrum sharing management unit 303, or the spectrum sharing management unit 303 sends, through the base station 302 or through a dedicated access network of the micro cell wireless access point 301, the amount of uplink spectrum resources available for downlink use to the micro cell wireless access point 301 covered by the macro cell, specifically, sends, to the micro cell wireless access point 301, a time subinterval in which the micro cell wireless access point 301 can configure a downlink channel.

After a time subinterval for configuring the downlink channel is indicated for the micro cell wireless access point 301, the uplink spectrum of the FDD macro cell is shared between the downlink channel of the micro cell and the macro cell in a spatial multiplexing or time division multiplexing manner in the time subinterval.

Those skilled in the art will appreciate that the modules or steps of the invention described above can be implemented in a general purpose computing device, centralized on a single computing device or distributed across a network of computing devices, and optionally implemented in program code that is executable by a computing device, such that the modules or steps are stored in a memory device and executed by a computing device, fabricated separately into integrated circuit modules, or fabricated as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for configuring a channel of a microcell wireless access point, comprising:

in one or more time subintervals included in a downlink radio frame period of an FDD macrocell wireless access point in an FDD macrocell covering a Frequency Division Duplex (FDD) macrocell of a microcell wireless access point, the microcell wireless access point configures a downlink channel in a spatial multiplexing or time division multiplexing mode on an uplink frequency spectrum used by the FDD macrocell wireless access point, wherein:

when the micro-cell wireless access point configures a downlink channel in a time division multiplexing mode, the downlink channel of the micro-cell wireless access point and the uplink channel of the FDD macro-cell wireless access point use the FDD macro-cell uplink frequency spectrum in a time division multiplexing mode; the step of configuring the downlink channel by the microcell wireless access point in a time division multiplexing manner includes: the micro-cell wireless access point is configured between a downlink channel on the uplink frequency spectrum of the FDD macro cell and an uplink channel on the uplink frequency spectrum of the FDD macro cell, and works in a time division multiplexing mode, and the micro-cell wireless access point is configured that the downlink channel on the uplink frequency spectrum of the FDD macro cell only transmits signals to a terminal served by the micro-cell wireless access point on time-frequency resources vacated by the FDD uplink channel;

when the microcell wireless access point configures a downlink channel in a spatial multiplexing mode, the downlink channel of the microcell wireless access point and the downlink channel of the FDD macrocell wireless access point use the FDD macrocell uplink frequency spectrum in a spatial multiplexing mode; the step of configuring the downlink channel by the microcell wireless access point in a spatial multiplexing manner includes: and the micro-cell wireless access point configures a downlink channel on the uplink frequency spectrum of the FDD macro-cell access point, and the downlink channel configured on the uplink frequency spectrum of the FDD macro-cell by the micro-cell wireless access point and the FDD macro-cell wireless access point use the same frequency at the same time or use the frequency with overlapping frequency at the same time to transmit signals to the respective served terminals in the time subinterval.

2. The method of claim 1, wherein:

and in the time subinterval, the micro-cell wireless access point configures a downlink channel on an FDD duplex guard band used by the FDD macro-cell access point, and transmits signals to a terminal served by the micro-cell wireless access point simultaneously with the downlink channel configured by the micro-cell wireless access point on an uplink frequency spectrum of the FDD macro-cell wireless access point.

3. The method of claim 1, wherein:

and in the time subinterval, the micro-cell wireless access point configures a downlink channel on an FDD downlink frequency band used by the FDD macro-cell access point and configures a downlink channel on an FDD macro-cell wireless access point uplink frequency spectrum to transmit signals to a terminal served by the micro-cell wireless access point simultaneously.

4. The method as claimed in claim 2, wherein the step of the micro cell wireless access point configuring the downlink channel on the FDD duplex guard band used by the FDD macro cell access point and transmitting the signal to the terminal served by the micro cell wireless access point simultaneously with the downlink channel of the micro cell wireless access point configuring the uplink spectrum of the FDD macro cell wireless access point comprises:

5. The method of claim 4, wherein:

and the downlink channel configured on the uplink frequency spectrum of the FDD macro cell and the downlink channel on the FDD duplex guard band are carried in the same time slot on the same wireless frame or on the time slots which simultaneously appear on different wireless frames keeping time slot synchronization.

6. The method of claim 4, wherein the FDD duplex guard band comprises:

a duplex guard band located between the uplink and downlink paired bands allocated to the FDD system, but not belonging to the time division duplex TDD licensed band;

or,

7. The method of claim 6, wherein:

the FDD uplink and downlink duplex protection frequency band which is located between the uplink frequency band and the downlink frequency band allocated to the FDD system and belongs to the TDD licensed frequency band comprises the duplex protection frequency band in the middle of 2500-2690 MHz.

8. The method of claim 1, wherein a time subinterval within the downlink radio frame period comprises:

9. The method of claim 1, wherein:

the downlink channel of the micro cell comprises a traffic channel and/or a control channel.

10. The method of claim 1, wherein the step of configuring the downlink channel comprises:

11. The method of claim 10, wherein:

the transmitting signals by two or more physically independent radio frequency transmitting channels comprises respectively realizing signal transmission on an FDD macro cell uplink frequency spectrum and an FDD duplex guard band by the two or more physically independent radio frequency transmitting channels by using respective independent power amplifiers, and respectively transmitting own physical carriers;

the signal is transmitted by one radio frequency transmitting channel which is designed in a physical unified manner, and the signal transmission on an FDD uplink frequency band and an FDD duplex guard band is realized by one radio frequency transmitting channel which is designed in a physical unified manner by using the same power amplifier, and independent physical carriers are respectively transmitted on the FDD uplink frequency band and the FDD duplex guard band, or signals modulated by the same physical carrier are transmitted on the FDD uplink frequency band and the FDD duplex guard band.

12. The method as claimed in claim 1, wherein the downlink channel configured by the microcell wireless access point uses a radio frame structure configured as follows:

13. The method of claim 1, wherein:

the modulation mode of the signals on the downlink channel configured by the micro cell wireless access point is the same as or different from the modulation mode of the signals received on an FDD uplink frequency band;

the modulation bandwidth of the signals on the downlink channel configured by the micro cell wireless access point is the same as or different from the modulation bandwidth of the signals received on the FDD uplink frequency band.

14. The method of claim 1, wherein:

and determining to configure the downlink channel in a spatial multiplexing or time division multiplexing mode according to a strategy of sharing a frequency spectrum between the micro-cell wireless access point and the FDD macro-cell wireless access point.

15. The method of claim 14, wherein:

the strategy of sharing the frequency spectrum is to use the uplink frequency spectrum of an FDD macro cell to the maximum extent to realize downlink transmission, and then a spatial multiplexing mode is adopted to configure downlink channels of the micro cell wireless access point and the macro cell wireless access point;

the strategy of sharing the frequency spectrum is to use the uplink frequency spectrum of the FDD macro cell to realize downlink transmission with compromised system complexity, and then a time division multiplexing mode is adopted to configure the downlink channel of the micro cell wireless access point and the uplink channel of the macro cell wireless access point.

16. The method of claim 1, wherein:

and the size of the time subinterval is adjusted by the network side according to the load condition of the FDD macro cell.

17. The method of claim 16, wherein the step of adjusting the size of the time sub-interval by the network side according to the load condition of the FDD macro cell comprises:

18. The method according to claim 17, wherein the step of the network side obtaining an imbalance degree between uplink and downlink of the spectrum usage of the FDD macrocell wireless access point, and adjusting the size of the time subinterval according to the imbalance degree comprises:

19. The method of claim 18, wherein:

the size of the time subinterval comprises the time slot number of an FDD macro cell wireless frame or a downlink wireless frame of the micro cell wireless access point.

20. The method of claim 1, further comprising:

21. An apparatus for configuring a channel of a microcell wireless access point, comprising:

a configuration module, configured to enable a micro cell wireless access point to configure a downlink channel in a spatial multiplexing or time division multiplexing manner on an uplink spectrum used by an FDD macro cell wireless access point in one or more time subintervals included in a downlink radio frame period of the FDD macro cell wireless access point in an FDD macro cell covering the micro cell wireless access point, wherein:

22. The apparatus of claim 21, wherein:

the configuration module is further configured to, in the time sub-interval, cause the micro-cell wireless access point to configure a downlink channel on an FDD duplex guard band used by the FDD macro-cell access point, and transmit a signal to a terminal served by the micro-cell wireless access point simultaneously with the downlink channel configured by the micro-cell wireless access point on the FDD macro-cell wireless access point uplink spectrum.

23. The apparatus of claim 21, wherein:

the configuration module is further configured to, in the time sub-interval, cause the micro-cell wireless access point to configure a downlink channel on an FDD downlink frequency band used by the FDD macro-cell access point and a downlink channel of the micro-cell wireless access point on an FDD uplink frequency spectrum of the macro-cell wireless access point to transmit signals to a terminal served by the micro-cell wireless access point at the same time.

24. The apparatus of claim 22, wherein:

the method comprises the following steps that the micro-cell wireless access point configures a downlink channel on an FDD duplex guard band used by the FDD macro-cell access point, and the micro-cell wireless access point configures the downlink channel on an uplink frequency spectrum of the FDD macro-cell wireless access point and simultaneously transmits signals to a terminal served by the micro-cell wireless access point, and comprises the following steps:

25. The apparatus of claim 24, wherein:

26. The apparatus of claim 24, wherein:

the FDD duplex guard band comprises:

or,

27. The apparatus of claim 26, wherein:

28. The apparatus of claim 21, wherein:

the step of configuring the downlink channel includes: configured to transmit signals by two or more physically independent radio frequency transmit channels;

29. The apparatus of claim 28, wherein:

30. The apparatus of claim 21, wherein:

the configuration module is further configured to enable a radio frame structure used by the downlink channel configured by the micro cell wireless access point to be configured as follows:

31. The apparatus of claim 21, wherein:

the configuration module is further configured to enable a modulation mode of a signal on the downlink channel configured by the micro cell wireless access point to be the same as or different from a modulation mode of a signal received on an FDD uplink frequency band;

and the modulation bandwidth of the signal on the downlink channel configured by the micro cell wireless access point is the same as or different from the modulation bandwidth of the signal received on the FDD uplink frequency band.

32. The apparatus of claim 21, wherein:

33. The apparatus of claim 32, wherein:

34. The apparatus of claim 21, wherein:

35. The apparatus of claim 34, wherein:

the step of adjusting the size of the time subinterval by the network side according to the load condition of the FDD macro cell includes: and the network side obtains the uplink and downlink imbalance degree of the frequency spectrum use of the wireless access point of the FDD macro cell by taking the FDD macro cell as a unit, and adjusts the size of the time subinterval according to the imbalance degree.

36. The apparatus of claim 35, wherein:

the network side obtains the uplink and downlink unbalance degree of the frequency spectrum use of the FDD macro cell wireless access point, and the step of adjusting the size of the time subinterval according to the unbalance degree comprises the following steps:

37. The apparatus of claim 36, wherein: