CN102917460A - Method and system for time division multiplexing of transmitting channels - Google Patents
Method and system for time division multiplexing of transmitting channels Download PDFInfo
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Abstract
The invention discloses a method and a system for time division multiplexing of transmitting channels to overcome the defect of lack of using transmitting channel redundancy in a multi-antenna system to reduce transmitting channels. The method includes: using a first group of transmitting channels on a first frequency band to transmit signals to a first geographic region through a first group of antenna units according to a first channel bandwidth in a first time interval; and using the first group of transmitting channels on a second frequency band to transmit signals in a second time interval after the first time interval, or using the first group of transmitting channels on a third group of antenna units to transmit signals, wherein the pass band width of the first channel is smaller than or equal to the width of the first frequency band, and the second frequency band is not identical to the first frequency band. By means of time division multiplexing of transmitting channels among different frequency bands and/or different antenna units, the defect of lack of using transmitting channel redundancy in the multi-antenna system to reduce the transmitting channels in the prior art is overcome.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and system for time division multiplexing transmission channels.
Background
With the introduction of Multiple-input Multiple-output (MIMO) technology and beamforming technology in wireless communication systems, wireless access systems become multi-antenna systems. With the introduction of spectrum aggregation technology, wireless communication systems have further evolved from multi-antenna systems to multi-antenna multi-band (multi-carrier) systems.
The transmission channel is the most costly functional module in the wireless communication system, and if the configuration number of the transmission channels of the multi-antenna multi-band system can be reduced by time division multiplexing the transmission channel on the premise of not reducing the system performance, the cost of the wireless communication system can be obviously reduced.
The basis for reducing the number of transmit channels required for a multi-antenna multi-carrier wireless communication system by time-multiplexing the transmit channels is the existence of the following redundancies in the multi-antenna multi-channel system:
first-type transmission channel redundancy-transmission channel redundancy existing in a co-frequency point multi-carrier multi-antenna co-cell (referring to a geographical area covered by multiple co-frequency carriers) system: in the same geographic cell, due to different geographic positions of terminals, the space-time channel characteristics of the terminals are different, and therefore, the number of antennas which can be used by different terminals in a MIMO mode is different. Although the number of streams of multi-antenna multi-stream transmission or the order of the MIMO channel that can be supported by the space-time channel is random for each terminal, statistically, the proportion of terminals that can use the maximum antenna configuration of one cell in one radio frame serving the terminal in the cell is statistically proportional. Some of the transmit channels allocated to a cell are in a redundant state on a time slot serving a terminal that does not require high order MIMO transmission or in a time slot serving a terminal whose space-time channel cannot support transmission with the maximum number of antennas allocated to the cell and does not require transmit diversity among fully allocated channels. Naturally, there is also redundancy in the transmission resources and baseband processing resources corresponding to these transmit channels.
The second kind of transmission channel redundancy-multiple frequency point multiple carrier same coverage (meaning that multiple carriers cover the same geographical area, and there are two or more carriers on each frequency point) exists in the multiple antenna system transmission channel redundancy: as mentioned above, there is a redundancy of transmission channels in the cell covered by each carrier, i.e. there are some time slots on which no or some of the transmission channels can be used. In a system using carrier aggregation, there is a first type of redundancy for each carrier, and the redundancy on these carriers introduces a new problem: since each carrier has redundancy, it is necessary to configure all carriers with the same number of antennas. Such redundancy is referred to herein as inter-carrier transmit channel redundancy.
Third type of transmit channel redundancy-redundancy that exists between multiple sectors at a site: the multi-carrier multi-antenna system in each sector has transmission channel redundancy, and more redundancy exists among sectors. Even if each sector adopts a redundancy elimination configuration, redundancy still exists among sectors, because the difference of the number of terminals or the number of services in different cells can cause the configuration of a transmission channel to have statistical redundancy among the sectors.
A fourth type of transmit channel redundancy — that which exists in Time Division Duplex (TDD) and Frequency Division Duplex (FDD) composite systems: in the uplink time slot of the TDD system, a transmitting channel configured to the TDD system is in a redundant/idle state.
The fifth type of transmit channel redundancy-transmit channel redundancy exists in a TDD system in which uplink and downlink timeslots are configured asynchronously on a non-continuous TDD band: there is transmit channel redundancy on each TDD band.
The utilization of the redundancy is a physical basis for realizing the time division multiplexing transmission channel, but a specific technical means is lacked at present.
There is currently a relatively intensive research in both the Multi-standard-radio (MSR) and software radio (SDR) fields. Within the 3GPP standards organization, MSR has been discussed more permanently, but the reconfiguration method thereof cannot achieve the effect of reducing the redundancy of the transmission channels existing in these systems.
In the MSR discussed in 3GPP, in the already proposed FDD _ MSR and TDD _ MSR, a multi-antenna and multi-carrier Radio Remote Unit (RRU) is a product form specified by the 3GPP technical specification, and the above-mentioned first to third types of redundancy exist. If a new RRU physical entity is further considered: TDD/FDD _ MSR, then in TDD/FDD _ MSR, all five transmit channel redundancies may exist.
From the demand of the operator for TDD/FDD hybrid networking, there will be a gradually significant market for the MSR in which TDD/FDD _ MSR comprehensively supports TDD radio channels and FDD radio channels, but the TDD/FDD _ MSR involves the problem of coexistence of TDD and FDD radio channels, which is generally considered to be a type of device with complex interference but insignificant practical significance at present. However, by properly selecting the TDD and FDD band combinations, the interference problem can be avoided, and due to its unique convenience in using the transmit channel during the TDD uplink timeslot, it is a device configuration that can reduce the overall cost.
Prior art 1: the Chinese patent application No. CN200980101905.5, entitled "front-end Circuit", provides the following technical solutions: front-end circuitry for a mobile radio designed for operation in a first TDD mobile radio system and a first FDD mobile radio system, both of which use the same frequency band; having a first FDD transmission path for a first FDD mobile radio system, the first FDD transmission path comprising a transmission amplifier (PA)F) And a transmit filter element (TF) of a Duplexer (DU)T) (ii) a Having a first TDD transmit path for a first TDD mobile radio system, the first TDD transmit path containing a transmit amplifier (PA)T) (ii) a Having AN antenna connection (AN) connectable to a Duplexer (DU) or a first TDD transmission path; having at least one transmit filter (TXF); having a switching device (SM) which can be used to connect the at least one transmission filter (TXF) to the first FDD transmission path or the first TDD transmission path。
It should be noted that, according to the detailed description in the specification of this invention, the "TDD" refers to half-duplex GSM, and not to TDD using the same frequency band in a time division manner as discussed in the present invention, the problem to be solved is how to share the transmission channel (transmission amplifier (PAT)) between half-duplex (HD-FDD; GSM) and full-duplex FDD by means of configurable filter design.
Prior art 2: the Chinese patent application No. CN200980111947.7, entitled "Radio Frequency (RF) signal multiplexing" provides the technical scheme that: in a Radio Frequency (RF) receiver, a receiver RF chain is tuned to a first (e.g., Global Positioning System (GPS)) channel to permit reception of a first (e.g., GPS) signal on the first (e.g., GPS) channel on the receiver RF chain during a first time duration. The receiver RF chain is tuned to a second (e.g., cellular paging) channel to permit reception of a second (e.g., cellular paging) signal on the second (e.g., cellular paging) channel on the receiver RF chain during a second time duration after the first time duration. A first (e.g., GPS) signal is processed during a first time duration and during a second time duration, the first (e.g., GPS) signal being absent any significant interruption during the second time duration. For example, the processing treats the actual interruption as a temporary short term fade of the first (e.g., GPS) signal during the second duration, or provides a bridge signal during the second duration (e.g., an estimated GPS signal on a receiver RF chain or an actual GPS signal received on another receiver RF chain).
Neither prior art 1 nor prior art 2 presents a method of sharing a radio frequency transmission channel over a frequency band used in a Time Division Duplex (TDD) manner and a frequency band used in a Frequency Division Duplex (FDD) manner.
Disclosure of Invention
The technical problem to be solved by the present invention is to overcome the defect that the prior art does not provide a method for reducing the number of transmission channels by using the transmission channel redundancy existing in a multi-antenna system.
In order to solve the above technical problem, the present invention first provides a method of time-division multiplexing transmission channels, wherein,
transmitting signals over a first frequency band at a first channel bandwidth to a first geographic area through a first set of antenna elements using a first set of transmit channels during a first time interval;
using the first set of transmit channels on a second frequency band for a second time interval after the first time interval; or, transmitting signals on a third set of antenna elements using the first set of transmit channels;
wherein the passband width of the first channel is less than or equal to the width of a first frequency band in a first time interval, and the second frequency band is a frequency band outside the first frequency band.
Preferably, at least one transmission channel of the first group of transmission channels configured on the second frequency band is configured on the first frequency band in a third time interval after the second time interval; or
And configuring at least one transmission channel in the first group of transmission channels configured on the third group of antenna units to the first group of antenna units in the third time interval.
Preferably, the terminal needing to use the first group of transmission channels is identified from the terminals served by the second frequency band, and the downlink channel of the terminal needing to use the first group of transmission channels is configured on the time-frequency resource formed by the second time interval and the second frequency band; or,
and identifying the terminal needing to use the first group of transmitting channels from the terminals served by the cell to which the third group of antenna units belong, and configuring the downlink channel of the terminal needing to use the first group of transmitting channels on the time-frequency resource consisting of the second time interval and the second frequency band.
Preferably, the step of identifying the terminal needing to use the first group of transmission channels from the terminals served by the second frequency band comprises at least one of the following methods:
identifying a terminal requiring use of the first set of transmit channels using a channel impulse response generated by a channel sounding reference signal transmitted on a second frequency band by a terminal serving the second frequency band;
and channel measurement information reported by the terminal using the second frequency band service is obtained by measuring in a second time interval.
Preferably, the step of using the channel impulse response generated by the sounding reference signal to identify the terminal needing to use the first set of transmission channels comprises the following steps:
determining the terminal as a terminal requiring to use the first group of transmission channels on the second frequency band when the channel impulse response indicates that the terminal can receive the multi-stream transmission on the second frequency band and the required number of transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band; or,
and when the channel impact response indicates that the network side is required to transmit data to the terminal in a mode of transmitting diversity or beamforming on the second frequency band, and the first group of transmitting channels are configured on the second frequency band only to reach the required number of channels to be used by the transmitting diversity or beamforming, determining the terminal as the terminal which needs to use the first group of transmitting channels on the second frequency band.
Preferably, the step of identifying the terminal needing to use the first group of transmission channels by using the channel measurement information reported by the terminal served in the second frequency band comprises the following steps:
when the channel measurement information reported by the terminal indicates that the terminal can receive multi-stream transmission on the second frequency band and the number of the required transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band, the terminal is judged as the terminal which needs to use the first group of transmission channels on the second frequency band; or,
and when the channel measurement information reported by the terminal indicates that the transmission power or the transmission rate required by the terminal can be achieved only by configuring the first group of transmitting channels on the second frequency band, the terminal is judged as the terminal needing to use the first group of transmitting channels on the second frequency band.
Preferably, the step of identifying a terminal needing to use the first set of transmission channels from terminals served by the cell to which the third set of antenna elements belongs includes:
the terminal sends a channel detection reference signal to the third group of antenna units on the first frequency band or the second frequency band, and identifies the terminal which needs to use the first group of transmission channels on the third group of antenna units according to the channel impact response generated by the channel detection reference signal;
and the channel measurement information which is reported by the terminal in the cell to which the third group of antenna units belong and contains the signal information transmitted by the third group of antenna units is measured in a second time interval.
Preferably, the channel measurement information reported by the terminal includes at least one of the following information:
the signal-to-interference ratio of a receiving channel on the first frequency band or the second frequency band in a second time interval of the terminal;
the terminal reports the channel quality information according to the measurement in the second time interval;
and the terminal reports the rank of the channel impact response matrix or the indication information of the rank according to the measurement in the second time interval.
Preferably, the second time interval is a time interval composed of downlink timeslots included in a radio frame on the second frequency band or on the third group of antenna units, and/or a time interval composed of subintervals of downlink timeslots included in the radio frame.
Preferably, the width and/or the starting position of the second time zone is determined according to one or a combination of the following ways:
determining a width and/or a starting position of the second time interval according to a duplex configuration on a first frequency band and/or a second frequency band;
determining the width and/or the starting position of the second time interval according to the preset starting position and the time width;
determining the width and/or the starting position of the second time interval according to the time width and the position of the idle time slot on the first frequency band;
determining the width and/or the starting position of the second time interval according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the first frequency band or the total service data transmission rate of the terminals, and/or according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the second frequency band or the total service data transmission rate of the terminals; and
and determining the width and/or the starting position of the second time interval according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the cell to which the first group of antenna units belong or the total service data transmission rate of the terminals, and/or according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the cell to which the third group of antenna units belong or the total service data transmission rate of the terminals.
Preferably, the step of determining the width and/or the starting position of the second time interval according to the duplex configuration on the first frequency band and/or the second frequency band comprises one of the following manners:
under the condition that a first frequency band is a frequency band used in a time division duplex mode, and a second frequency band is a downlink frequency band used in a frequency division duplex mode, determining the starting position of a second time interval on the second frequency band in one or more time subintervals formed by uplink time slots on the first frequency band, wherein the width of the second time interval is smaller than or equal to the time subintervals;
under the condition that a time interval in which an uplink time slot and a downlink time slot simultaneously appear exists between an uplink time slot of a time division duplex radio frame on the first frequency band and a downlink time slot of the time division duplex radio frame on the second frequency band, the starting position of the second time interval on the second frequency band is determined to be in the time interval in which the uplink time slot and the downlink time slot simultaneously appear, and the width of the second time interval is smaller than or equal to the time interval in which the uplink time slot and the downlink time slot simultaneously appear.
Preferably, the step of determining the width and/or the starting position of the second time interval according to the predetermined starting position and time width comprises:
assigning a group of downlink time slots as the second time interval on a radio frame on a second frequency band, and configuring downlink channels of terminals needing to use the first group of transmission channels on time-frequency resources formed by the second time interval and the second frequency band according to the difference of the number of the transmission channels needing to be used among a group of terminals served by the second frequency band; or,
and allocating downlink channels of the terminals needing to use the first group of transmission channels on the second time interval contained in the wireless frame sent by the third group of antenna units according to the difference of the number of the transmission channels needing to be used among a group of terminals served by the cell to which the third group of antenna units belong.
Preferably, the step of determining the width and/or the starting position of the second time interval according to the time width and the position of the idle timeslot on the first frequency band comprises:
the second time interval is configured on the time interval composed of idle time slots on the first frequency band, and the idle time slots are in idle states at least in part on the first frequency band due to small downlink service load on the first frequency band; or that there are time slots in the first frequency band that are idle due to the absence of downlink traffic activity on the first frequency band.
Preferably, the step of determining the width and/or the starting position of the second time interval according to the number of terminals needing to use the first group of transmission channels in the group of terminals served by the first frequency band or the total traffic data transmission rate of such terminals, and/or according to the number of terminals needing to use the first group of transmission channels in the group of terminals served by the second frequency band or the total traffic data transmission rate of such terminals, includes at least one of the following two methods:
selecting a first type of terminal needing to use a first group of transmission channels on a first frequency band from terminals served by the first frequency band; determining the width of the first time interval according to the number of terminals needing to use a first group of transmission channels on a first frequency band or the total service data transmission rate of the terminals, and determining the starting position of the second time interval outside the first time interval; and
selecting terminals needing to use the first group of transmission channels on the second frequency band from the terminals served by the second frequency band; the width of the second time interval is determined according to the number of terminals needing to use the first group of transmission channels on the second frequency band or the total service data transmission rate of the terminals.
Preferably, the step of determining the location of the second time interval outside the first time interval comprises:
configuring downlink channels of terminals on a first frequency band, which need to use a first group of transmitting channels, and terminals which do not need to use the first group of transmitting channels on different time slots;
configuring downlink channels of terminals on a second frequency band which need to use the first group of transmitting channels and terminals which do not need to use the first group of transmitting channels on different time slots;
the time slot configurations of the terminals needing to use the first group of transmission channels on the first frequency band and the second frequency band are orthogonal in time;
taking a time interval formed by time slots occupied by terminals needing to use a first group of transmitting channels on a first frequency band as the first time interval;
taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels on a second frequency band as the second time interval;
configuring a start time of the second time interval outside the first time interval.
Preferably, the step of determining the width and/or the starting position of the second time interval according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the cell to which the first group of antenna units belongs or the total traffic data transmission rate of such terminals, and/or according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the cell to which the third group of antenna units belongs or the total traffic data transmission rate of such terminals, includes at least one of the following two methods:
selecting a terminal needing to use a first group of transmitting channels on a first group of antenna units from a group of terminals served by a cell to which the first group of antenna units belong; determining the width of the first time interval according to the number of terminals needing to use a first group of transmitting channels on a first group of antenna units or the total service data transmission rate of the terminals, and determining the starting position of the second time interval outside the first time interval; and
selecting a terminal which needs to use the first group of transmitting channels on the third group of antenna units from a group of terminals which are served by a cell to which the third group of antenna units belong; and determining the width of the second time interval according to the number of terminals using the first group of transmission channels on the third group of antenna units or the total service data transmission rate of the terminals.
Preferably, the step of determining the starting position of the second time interval outside the first time interval comprises:
configuring downlink channels of terminals which need to use the first group of transmission channels and terminals which do not need to use the first group of transmission channels in a group of terminals which are served by a cell to which the first group of antenna units belong on different time slots;
configuring downlink channels of terminals which need to use the first group of transmitting channels and terminals which do not need to use the first group of transmitting channels in a group of terminals which are served by a cell to which a third group of antenna units belongs on different time slots;
time slot configurations of a terminal needing to use the first group of transmission channels in a group of terminals served by a cell to which the first group of antenna units belong are orthogonal in time with time slot configurations of a terminal needing to use the first group of transmission channels in a group of terminals served by a cell to which the third group of antenna units belong;
taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels in a group of terminals which are served by a cell to which the first group of antenna units belongs as the first time interval;
taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels in a group of terminals which are served by a cell to which a third group of antenna units belongs as the second time interval;
configuring a start time of the second time interval outside the first time interval.
Preferably, the step of transmitting signals using said first set of transmission channels on a second frequency band comprises:
the first set of transmit channels and the second set of transmit channels simultaneously transmit signals to a second geographic area in a coordinated manner using a second channel bandwidth on a second frequency band;
wherein the first set of transmission channels uses the first set of antenna elements, the second set of transmission channels uses the second set of antenna elements, the bandwidth of the second channel is less than or equal to the width of a second frequency band, the second frequency band does not intersect with the first frequency band in the frequency domain, and the second geographic area is the same as or overlaps with the first geographic area.
Preferably, the first time interval is a time interval formed by uplink time slots of a time division duplex system, the first frequency band is a frequency band used in a time division duplex manner, the second frequency band is a downlink frequency band used in a frequency division duplex manner or a frequency band used in a downlink one-way manner, the second group of transmission channels are transmission channels operating in compliance with the technical specification of the frequency division duplex system or transmission channels operating in compliance with the technical specification of radio broadcasting on the second frequency band, the transmission bandwidths and/or the center frequencies of the first group of transmission channels are configured on the first frequency band and the second frequency band in a time division manner, and the second time interval in which the first group of transmission channels transmit signals on the second group of frequency band is located in the time interval formed by uplink time slots on the first frequency band.
Preferably, the first time interval is a time interval composed of uplink time slots of a time division duplex system, the first frequency band and the second frequency band are frequency bands used in a time division duplex manner, and in the second time interval, an appearing time slot on the first frequency band is an uplink time slot or an idle time slot, and an appearing time slot on the second frequency band is a downlink time slot, and the transmission bandwidths and/or the center frequencies of the first group of transmission channels are configured on the first frequency band and the second frequency band in a time division manner.
Preferably, the first time interval is a time interval formed by downlink time slots of a frequency division duplex system, and the first frequency band and the second frequency band are both downlink frequency bands used in a frequency division duplex mode; or, the first time interval is a time interval composed of downlink time slots of the time division duplex system, and the first frequency band and the second frequency band are both frequency bands used in a time division duplex mode;
in a second time interval, the time slot on the first frequency band is an idle time slot or a downlink time slot without using the first group of transmission channels, and the downlink time slot appearing on the second frequency band is a time slot configured to the following terminals:
a terminal which needs a network side to use a first group of transmitting channels to increase the number of antennas for transmitting signals to the terminal; or, a terminal that needs the network side to use the first group of transmission channels to increase the network side transmission power;
configuring a transmission bandwidth and/or a center frequency of the first set of transmission channels on a first frequency band and a second frequency band in a time division manner.
Preferably, the step of configuring the transmission bandwidth and/or the center frequency of the first group of transmission channels on the first frequency band and the second frequency band in a time division manner comprises:
configuring the first set of transmit channels with a same wireless specification over a first frequency band and a second frequency band;
alternatively, the first set of transmit channels are configured with different wireless technology specifications over the first frequency band and the second frequency band.
Preferably, the step of transmitting signals using the first set of transmit channels on the third set of antenna elements comprises:
the first set of transmission channels uses a third set of antenna units, the fourth set of transmission channels uses a fourth set of antenna units, the first set of transmission channels and the fourth set of transmission channels use the same carrier frequency on a first frequency band or a second frequency band to simultaneously transmit signals to a second geographic area in a coordinated manner, and the second geographic area is a different geographic area or an overlapped geographic area with the first geographic area.
Preferably, the first set of transmit channels uses a third set of antenna elements, the fourth set of transmit channels uses a fourth set of antenna elements, and the third set of antenna elements is one of the following:
an antenna for use in a frequency division duplex system;
an antenna used in a time division duplex system;
an antenna used in both time division duplex and frequency division duplex systems.
Preferably, the first time interval is a time interval composed of downlink time slots of a time division duplex system, the first frequency band is a frequency band used in a time division duplex manner, the second time interval is a time interval composed of downlink time slots of a system to which the third group of antenna units belongs, the third group of antenna units transmits signals on the second frequency band, and the second frequency band is a downlink frequency band used in a frequency division duplex manner.
Preferably, the fourth set of transmission channels is a transmission channel operating in compliance with the technical specification of the frequency division duplex system on the second frequency band, and the network side configures the transmission bandwidth and the center frequency of the first set of transmission channels on the first frequency band used by the first set of antenna elements and the second frequency band used by the fourth set of antenna elements in a time division manner;
a second time interval of the first group of transmitting channels for transmitting signals on the second frequency band is positioned in a time interval formed by uplink time slots on the first frequency band;
the second geographical area covered by the signal transmitted by the third group of antenna units used by the first group of transmission channels is different from or overlaps with the first geographical area covered by the signal transmitted by the first group of antenna units.
Preferably, the first set of transmit channels uses a third set of antenna elements and the fourth set of transmit channels uses a fourth set of antenna elements;
the first group of antenna units, the third group of antenna units and the fourth group of antenna units are antenna units used by a frequency division duplex system or antenna units used by a time division duplex system; the first group of antenna units and the third group of antenna units are antenna units covering different cells on the same site.
Preferably, the first time interval is a time interval composed of downlink time slots of a frequency division duplex system, or a time interval composed of downlink time slots of a time division duplex system;
the first group of transmitting channels transmits on the third antenna unit by using the first frequency band, or transmits on the third antenna unit by using the second frequency band, and in the second time interval, the time slot of the first group of transmitting channels transmitting signals on the third group of antenna units is the idle time slot of the system to which the first antenna unit belongs or the time slot of the system to which the first antenna unit belongs not using the first group of transmitting channels, and the downlink time slot appearing on the third group of antenna units in the second time interval is the time slot configured to the following terminals:
the time slot used by the terminal needing to use the first group of transmitting channels to increase the number of antennas for transmitting signals to the terminal;
or, the time slot used by the terminal that needs to use the first group of transmission channels to increase the transmission power that can be output by the network side;
wherein the first set of transmit channels are switched between the first and third sets of antenna elements in a time-division manner.
Preferably, the step of simultaneously transmitting signals to the second geographical area in a coordinated manner includes:
transmitting signals between antennas in a transmit diversity manner to the second geographic area;
transmitting signals between antennas to the second geographical area in a multiple-input multiple-output mode; or
Transmitting signals between antennas in a beamforming manner to the second geographic area.
The invention also provides a system for multiplexing the transmitting channel, wherein:
the first system structure mode, time division multiplexing transmitting channel between different frequency bands on the same group of antenna units, the system includes:
the system comprises a first group of antenna units including at least one antenna unit, a first group of transmitting channels including at least one transmitting channel with adjustable frequency point and/or transmitting bandwidth, a terminal scheduling unit and a transmitting channel scheduling unit, wherein:
the terminal scheduling unit is used for allocating downlink channel resources to the terminal needing to use the first group of transmitting channels on the second frequency band and/or the first frequency band, configuring the downlink channels of the terminal needing to receive the signals transmitted by the first group of transmitting channels from the first group of antenna units on the first frequency band in a first time interval, and/or configuring the downlink channels of the terminal needing to receive the signals transmitted by the first group of transmitting channels from the first group of antenna units on the second frequency band in a second time interval;
the transmission channel scheduling unit is configured to configure a first group of transmission channels in a time division multiplexing manner between a first frequency band and a second frequency band, the first group of transmission channels are in a state of being configured on the first frequency band in a first time interval, and the first group of transmission channels are in a state of being configured on the second frequency band in a second time interval;
the first group of transmission channels is configured to adjust a center frequency of the transmission channels and/or a bandwidth of the transmission channels according to the control of the transmission channel scheduling unit to form a second parameter configuration state, and use the first group of antenna units to transmit signals to the terminal configured on the second time interval on the second frequency band in the second parameter configuration state;
or, the system is constructed in a second way, the transmitting channel is time division multiplexed among different antenna units, and the system comprises:
the system comprises a first group of antenna units including at least one antenna unit, a third group of antenna units including at least one antenna unit, a first group of transmitting channels including transmitting channels with adjustable at least one frequency point and/or transmitting bandwidth, a terminal scheduling unit and a transmitting channel scheduling unit, wherein:
the terminal scheduling unit is configured to assign, in the first frequency band and/or the second frequency band, downlink channels of terminals that need to use the third group of antenna units in the second time interval, and/or assign, in the first frequency band, downlink channels of terminals that need to use the first group of antenna units in terminals served by the first frequency band in the first time interval;
the transmission channel scheduling unit is configured to configure a first group of transmission channels in a time division multiplexing manner between the first group of antenna units and the third group of antenna units, where the first group of transmission channels are in a state of being configured on the first group of antenna units in a first time interval, and the first group of transmission channels are in a state of being configured on the third group of antenna units in a second time interval;
the first group of transmission channels is configured to adjust a center frequency of the transmission channels and/or a bandwidth of the transmission channels according to the control of the transmission channel scheduling unit to form a third parameter configuration state, and use the third group of antenna units to transmit signals to the terminal configured on the second time interval by using the downlink channel on the first frequency band in the third parameter configuration state; or forming a fourth parameter configuration state, and transmitting signals to the terminal configured with the downlink channel on the second time interval by using the third group of antenna units on the second frequency band in the fourth parameter configuration state.
Preferably, in the first configuration of the system, the system further includes:
a terminal classification unit, configured to identify a terminal that needs to use the first group of transmission channels from terminals served in the second frequency band and/or from terminals served in the first frequency band;
in the second configuration of the system, the system further includes:
and the terminal classifying unit is used for identifying the terminal needing to use the first group of transmitting channels from the terminal served by the service cell to which the third group of antenna units belong and/or the terminal served by the service cell to which the first group of antenna units belong.
Preferably, the terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels from terminals served in the second frequency band by using at least one of the following methods:
identifying a terminal requiring use of the first set of transmit channels using a channel impulse response generated by a channel sounding reference signal transmitted on a second frequency band by a terminal serving the second frequency band;
and channel measurement information reported by the terminal using the second frequency band service, wherein the measurement information reported by the terminal needing to use the first group of transmission channels is obtained by measuring in the second time interval or in the first time interval.
Preferably, the terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels from terminals served in the first frequency band by at least one of the following methods:
identifying a terminal requiring use of the first set of transmit channels using a channel impulse response generated by a channel sounding reference signal transmitted on the first frequency band by a terminal serving the first frequency band;
the channel measurement information reported by the terminal using the first frequency band service is obtained by measuring the measurement information reported by the terminal needing to use the first group of transmission channels in a first time interval.
Preferably, the terminal classifying unit in the first system configuration mode is configured to determine the terminal as a terminal that needs to use the first group of transmission channels on the second frequency band, when the channel impulse response indicates that the terminal can receive multi-stream transmission on the second frequency band and the required number of transmission streams can be achieved only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission.
Preferably, the terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels by using channel measurement information reported by a terminal served by the second frequency band, in the following manner:
when the channel measurement information reported by the terminal indicates that the terminal can receive multi-stream transmission on the second frequency band and the number of required transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission, the terminal is determined as the terminal needing to use the first group of transmission channels on the second frequency band; or,
when the channel measurement information reported by the terminal indicates that the transmission power or the transmission rate required by the terminal can be achieved only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission, the terminal is judged as the terminal needing to use the first group of transmission channels on the second frequency band.
Preferably, the terminal classifying unit in the second system configuration mode is configured to send, by the terminal, a channel sounding reference signal to the third group of antenna units in the first frequency band or the second frequency band, and identify, according to a channel impulse response generated by the channel sounding reference signal, a terminal that needs to use the first group of transmission channels on the third group of antenna units; and/or using the channel measurement information which is reported by the terminal in the cell to which the third group of antenna units belong and does not contain the signal information transmitted by the third group of antenna units in the first time interval.
Preferably, the channel measurement information reported by the terminal includes at least one of the following information:
a signal-to-interference ratio of a receiving channel on a first frequency band or a second frequency band in a first time interval by a terminal;
the terminal reports the channel quality information according to the measurement in the second time interval or the first time interval;
and the terminal reports the rank of the channel impact response matrix or the indication information of the rank according to the measurement in the second time interval.
Preferably, the terminal classifying unit in the second system configuration is configured to identify a terminal that needs to use the first group of transmission channels on the third group of antennas by using at least one of the following methods:
when the signal-to-interference ratio or channel quality information of a receiving channel, which is reported by a terminal and measured in a first time interval, cannot meet the data transmission rate requested by the terminal, identifying the terminal as the terminal needing to use a first group of transmitting channels on a third group of antennas;
and when the rank of the channel impulse response matrix measured in the second time interval or the indication information of the rank reported by the terminal indicates that the rank of the channel impulse response matrix can be reached only by using the first group of transmitting channels or the number of parallel transmission streams represented by the indication information of the rank, identifying the terminal as the terminal needing to use the first group of transmitting channels on the third group of antennas.
Preferably, in the first configuration, the first group of transmission channels is configured to transmit signals to a terminal whose downlink channel is configured in the second time interval in the following manner:
independently transmitting using the first set of antenna elements on a second frequency band;
in the second configuration, the first group of transmission channels is configured to transmit signals to the terminal whose downlink channel is configured in the second time interval in the following manner:
and independently transmitting using a third set of antenna elements on the first frequency band or the second frequency band.
Preferably, in the first configuration, the system further includes a second group of antenna units including at least one antenna unit, where the second group of antenna units and the first group of antenna units belong to the same antenna array or are disposed at the same site; the first group of transmission channels are used for transmitting signals to the terminal with the downlink channel configuration on the second time interval in the following way:
transmitting in a second frequency band using the first set of antenna elements in cooperation with the second set of antenna elements;
in the second configuration, the system further includes a fourth group of antenna units including at least one antenna unit, where the fourth group of antenna units and the third group of antenna units are deployed on the same site and cover the same service cell, and the first group of transmission channels are configured to transmit signals to a terminal whose downlink channel is configured in the second time interval in the following manner:
and transmitting on the first frequency band or the second frequency band using the third set of antenna elements in cooperation with the fourth set of antenna elements.
Preferably, in the first configuration, the system further includes a fifth group of antenna units including at least one antenna unit, and the fifth group of antenna units and the first group of antenna units are disposed at adjacent sites; the first group of transmission channels are used for transmitting signals at the terminal with the downlink channel configuration on the second time interval in the following way:
transmitting in a second frequency band using the first set of antenna elements and the fifth set of antenna elements;
in the second configuration, the system further includes a sixth group of antenna units including at least one antenna unit, where the sixth group of antenna units and the third group of antenna units are disposed at adjacent sites; the first group of transmission channels are used for transmitting signals to the terminal with the downlink channel configuration on the second time interval in the following way:
and transmitting in cooperation with the fifth set of antenna elements on the first frequency band or the second frequency band using the third set of antenna elements.
Preferably, in the first configuration, the terminal scheduling unit is configured to select a terminal that needs to use the first group of transmission channels from terminals served by the second frequency band and/or the first frequency band according to the classification result of the terminal classification unit;
in the second configuration, the terminal scheduling unit is configured to select, according to the classification result of the terminal classification unit, a terminal that needs to use the first group of transmission channels from terminals served by a cell to which the third group of antenna units belongs and/or terminals served by the first frequency band.
Preferably, in the first configuration, the terminal scheduling unit is configured to configure a downlink channel in a second time interval for a terminal that needs to use the first group of transmission channels in the second frequency band, and/or configure a downlink channel in a first time interval for a terminal that needs to use the first group of transmission channels in the first frequency band;
in the second configuration, the terminal scheduling unit is configured to configure a downlink channel in a second time interval for a terminal that needs to use the first group of transmission channels in the first frequency band or the second frequency band through the third group of antenna units, and/or configure a downlink channel for a terminal that needs to use the first group of transmission channels in the first frequency band through the first group of antenna units.
Preferably, in the first configuration, the transmission channel scheduling unit is configured to determine the second time interval by:
configuring the second time interval on a predetermined time slot on a radio frame on a second frequency band;
determining the second time interval on the time interval occupied by the uplink time slot of the time division duplex system on the first frequency band;
determining the second time interval within an idle time interval on a first frequency band; or,
determining the second time interval outside of an activation time interval of the first set of transmit channels on a first frequency band;
wherein the predetermined time slot is a time slot designated on a second frequency band for transmitting data to a terminal using a first set of transmit channels, and the predetermined time slot is orthogonal in time to dwell time intervals of the first set of transmit channels on a first frequency band;
in the second configuration, the transmission channel scheduling unit is configured to determine the second time interval by using at least one of the following manners:
configuring the second time interval on a preset time slot on a wireless frame sent by a system to which a third antenna unit belongs;
determining the second time interval on the time interval occupied by the uplink time slot of the time division duplex system configured on the first frequency band;
determining the second time interval within an idle time interval on a first frequency band; or,
determining the second time interval outside of an activation time interval of the first set of transmit channels on a first frequency band;
the predetermined time slot is a time slot designated on the third set of antenna elements for transmitting signals to the terminal using the first set of transmit channels, and the predetermined time slot is orthogonal in time to the dwell time interval of the first set of transmit channels on the first frequency band.
Preferably, in the first or second configuration, the first group of transmission channels includes:
a radio frequency circuit unit including a radio frequency power amplifier;
a radio frequency circuit unit including a radio frequency power amplifier, a D/A conversion circuit unit;
the device comprises a radio frequency circuit unit comprising a radio frequency power amplifier, a D/A conversion circuit unit and a circuit unit for performing baseband processing on data to be transmitted; or
The radio frequency circuit unit comprises a radio frequency power amplifier, an intermediate frequency circuit unit corresponding to the radio frequency power amplifier, a D/A conversion circuit unit and a circuit unit for performing baseband processing on data to be transmitted.
Preferably, in the first configuration, the same local oscillator is used when the first group of transmission channels resides on the second frequency band twice and transmits signals using the first group of antenna units;
in the second configuration, the same local oscillator is used for the first group of transmission channels when the third group of antenna units are used for transmitting signals twice.
Preferably, in the first configuration, different antenna elements are used for transmitting signals to the terminal on the first frequency band and for receiving signals from the terminal on the first frequency band, and the first group of antenna elements are antenna elements for transmitting signals to the terminal;
in the second configuration, the service cell to which the third group of antenna elements belongs transmits signals to the terminal serving the third group of antenna elements, and the third group of antenna elements transmits signals to the terminal using the first frequency band or the second frequency band in the cell to which the third group of antenna elements belongs, the antenna elements being different from the antenna elements used for receiving signals from the terminal.
Preferably, in the first configuration, the first group of transmission channels uses a first transmission filter when transmitting signals to the terminal using the first group of antenna elements in the first frequency band, and uses a first reception filter for the antenna elements for receiving signals in the first frequency band;
in the second configuration, the first group of transmission channels uses the second transmission filter when transmitting signals to the terminal using the third group of antenna units, and the service cell to which the third group of antenna units belongs uses the second reception filter when receiving signals from the terminal in service.
The embodiment of the invention utilizes the redundancy of a transmitting channel generated by a statistical rule existing between terminals in a multi-antenna and/or multi-frequency band system on a space-time channel characteristic on a specific time interval and the transmitting channel redundancy existing in a TDD duplex mode on the specific time interval to multiplex the transmitting channel in a time division mode, overcomes the defect that the transmitting channel existing in the multi-antenna system in the prior art is redundantly configured, and reduces the number of the transmitting channels in the multi-antenna system; the number of transmit channels required for a multiple antenna system is reduced by time-division multiplexing the transmit channels, in particular between a frequency band used in TDD mode and a frequency band used in FDD mode, and between two TDD frequency bands used in pair.
The embodiment of the invention overcomes the defect that the prior art does not provide a method for reducing the number of the transmitting channels by utilizing the transmitting channel redundancy existing in a multi-antenna system by time division multiplexing the transmitting channels among different frequency bands and/or among different antenna units, and realizes the following mode for reducing the number of the transmitting channels in the multi-antenna system:
time division multiplexing the transmission channel on TDD and FDD frequency bands;
time division multiplexing transmit channels over two TDD frequency bands;
time division multiplexing transmission channels among different frequency bands in a multi-carrier and/or multi-frequency band system covering the same geographic area;
transmit channels are time division multiplexed between different frequency bands and/or between different antenna elements in a multi-carrier and/or multi-band system covering different geographical areas at a common site.
The embodiment of the invention can achieve flexible configuration among different technical specifications, obviously reduce the basic configuration of the system to the number of the radio frequency channels and obviously reduce the networking cost.
Drawings
Fig. 1 is a flowchart illustrating a method for multiplexing transmit channels according to an embodiment of the present invention.
Fig. 2 is an example of a method for scheduling transmit channels between frequency bands and/or antenna elements.
Fig. 3(a) and fig. 3(b) show an example of a method for time-division multiplexing transmission channels between TDD and FDD bands.
Fig. 4(a) and fig. 4(b) are an example of a method for configuring a transmission channel in a time division manner on two non-adjacent TDD bands.
Fig. 5(a) and 5(b) show a system in which transmission channels are arranged in a time-division manner between frequency bands.
Fig. 6 is a schematic diagram of time division multiplexing transmission channels between antenna units of different cells co-sited at different sites.
Fig. 7 is a diagram illustrating a method for scheduling transmit channels between frequency bands and/or antenna units.
Fig. 8 is a schematic diagram of a system for time-division multiplexing transmit channels.
Detailed Description
The prior art does not provide a technical solution for time division multiplexing/statistically multiplexing transmission channels between different frequency bands or between different antenna elements, taking advantage of the differences in channel real-time characteristics, transmission link modes and traffic classes between terminals receiving data on the same frequency band. In particular, there is no proposed method for exploiting the difference in the maximum number of radio frequency channels that a terminal in different geospatial positions can use in a spatially multiplexed manner in a multi-antenna system.
Specifically, the prior art does not give a method how to utilize the following resources in the above-described problems:
1) idle transmitting channels in TDD uplink period;
2) and during the downlink time slot of the TDD or FDD system, the idle state of a part of TDD transmission channel or FDD transmission channel is determined by the rank of a wireless channel impact response matrix between the terminal and the base station or determined by the service request of the terminal.
After a specific device architecture is adopted, the statistical rule existing in the space-time channel characteristic among terminals in a multi-antenna system is effectively utilized, and the difference of downlink loads among different frequency bands or different cells is effectively utilized, the number of transmitting channels can be obviously reduced, and the cost of the system is reduced. Especially for a TDD/FDD hybrid system and a system which configures TDD air interfaces in pairs on two discontinuous frequency bands, the transmitting channel of the TDD can be multiplexed on other frequency bands, flexible configuration between different technical specifications can be achieved, basic configuration of the system on the number of radio frequency channels is obviously reduced, and networking cost is obviously reduced.
Furthermore, the prior art does not disclose and utilize the following mechanisms that may lead to a reduction in the number of channels: the difference in the real-time characteristics of the wireless channel between terminals at different geographical locations within the cell, in particular the statistical difference in the channel matrix rank between the reception channels of the terminals.
The embodiment of the invention provides a method for time division multiplexing transmitting channels, which realizes time division multiplexing of one or more transmitting channels in one of the following modes:
(1) time division multiplexing a transmission channel between a frequency band used in a Time Division Duplex (TDD) manner and a downlink frequency band used in a Frequency Division Duplex (FDD) manner;
(2) time-division multiplexing transmission channels between a frequency band used in a TDD manner and a frequency band (including a broadcast frequency band) used in a unidirectional downlink manner;
(3) time division multiplexing the transmit channel between two frequency bands used in TDD;
(4) time division multiplexing the transmission channel between two downlink frequency bands used in an FDD manner;
(5) and time division multiplexing transmitting channels between the first group of antenna units and the third group of antenna units, wherein the first group of antenna units and the third group of antenna units are antenna units covering different geographical areas on the same site, or the first group of antenna units and the third group of antenna units are antenna units in the same antenna combination.
The present invention takes advantage of the following transmit path redundancy present in existing multi-antenna and/or multi-band systems:
(1) a transmitting channel of the TDD system which is idle in the TDD uplink time slot period of the system;
(2) the idle of a part of the transmitting channels is determined by the statistical difference of the channel matrix rank between the receiving channels of the terminal or the service requirement of the terminal during the TDD downlink time slot of the system or on the frequency band used by the FDD downlink channel.
These redundancies exist in the system in one or more of the following ways:
first-type transmission channel redundancy-transmission channel redundancy existing in a co-frequency point multi-carrier multi-antenna co-cell (referring to a geographical area covered by a plurality of co-frequency carriers) system;
second-type transmission channel redundancy-transmission channel redundancy existing in a multi-frequency multi-carrier same-coverage (which means that a plurality of carriers cover the same geographical area, and two or more carriers exist on each frequency point) multi-antenna system;
third type of transmit channel redundancy-redundancy that exists among multiple sectors on a site;
the fourth type of transmission channel redundancy — that existing in TDD and FDD composite systems: in the uplink time slot of the TDD system, a transmitting channel configured to the TDD system is in a redundant/idle state;
the fifth type of transmit channel redundancy-transmit channel redundancy exists in a TDD system in which uplink and downlink timeslots are configured asynchronously on a non-continuous TDD band: there is transmit channel redundancy on each TDD band.
In various embodiments of the present invention, the configuration of the transmitting antenna unit and the receiving antenna unit covering the same cell is one of the following:
in the first antenna configuration mode, the same cell shares the transmitting antenna unit and the receiving antenna unit, and the mode of sharing the antenna unit is a mode commonly used in the existing cellular mobile communication system. For example, in the GSM system, a receiving channel and a transmitting channel on the network side share an antenna unit; in the TD-SCDMA system, the network side channel receiving and transmitting channels also time-division multiplex the antenna units.
In the second antenna configuration mode, the same cell uses different antenna units for transmitting signals to the terminal and receiving signals from the terminal, which is not applied in the existing cellular mobile communication system. However, in the way of time-division multiplexing the transmission channels as described in the embodiments of the present invention, the following advantages can be obtained by using this method:
(1) the two antennas which are separately installed can increase the isolation of a network side transmitting channel from a network side receiving channel;
(2) a circulator or a duplexer under the traditional shared antenna structure is omitted, so that the complexity and the insertion loss of the system are reduced, and the coverage of the cell is improved.
Moreover, in the case of multi-band and multi-system integrated networking, different antenna units are used for transmitting and receiving signals, which increases the occupied space for installing the antenna units, but is also worth, for example, when a TDD system and an FDD system cover the same geographical area, according to the prior art, the FDD system configures one group of antennas to cover one geographical area by adopting a manner of sharing antennas for transmitting and receiving, and the TDD system also configures one group of antennas to cover the geographical area by adopting a manner of sharing antennas for transmitting and receiving, so that two groups of antenna units are used in total, and each group is used in a manner of sharing antennas for transmitting and receiving. In the embodiment of the present invention, under the condition that the transmitting and receiving antennas are separated, the same set of antennas is used for the transmitting channel of the FDD system and the transmitting channel of the TDD system as the transmitting antenna of the covered geographic area, and the same set of antennas is used for the receiving channel of the FDD system and the receiving channel of the TDD system to receive signals from the covered geographic area. In this way, the power amplifier of the transmitting channel is conveniently configured on the TDD frequency band and the FDD frequency band, the out-of-band leakage power of the frequency band where the FDD transmitting channel is located to the TDD receiving frequency band is reduced, the number of the antennas is two, and the situation is the same as that of the TDD system and the FDD system which are separately deployed.
In the case of the second antenna arrangement, the transmitting filter is used for the transmitting antenna, and the receiving filter is used for the receiving antenna. The transmit filter is a different physical device than the receive filter. In this filter configuration, the FDD band and the TDD band share a transmit filter, which is reduced by one filter compared to the TDD system and the FDD system when they are separately deployed.
Embodiments of the present invention provide a method for time-division multiplexing transmission channels between different frequency bands or between different antenna elements. As shown in fig. 1, it mainly includes the following steps:
step S110, in a first time interval, a first group of transmission channels transmit signals to a first geographical area through a first group of antenna units on a first frequency band with a first channel bandwidth, and a pass band width of the first channel is smaller than or equal to a width of the first frequency band in the first time interval.
Step S120, in a second time interval after the first time interval, transmitting signals on the second frequency band using the first group of transmission channels or on the third group of antenna units using the first group of transmission channels.
Wherein,
the step of using the first set of transmit channels on the second frequency band is: the first group of transmitting channels and the second group of transmitting channels simultaneously transmit signals to the second geographic area in a coordinated manner by using a second channel bandwidth on a second frequency band, the first group of transmitting channels uses the first group of antenna units, the second group of transmitting channels uses the second group of antenna units, the second channel bandwidth is less than or equal to the width of the second frequency band, the second frequency band and the first frequency band do not have intersection on the frequency domain, and the second geographic area is the same as or overlaps with the first geographic area;
the step of using the first set of transmit channels on the third set of antenna elements is: the first set of transmit channels uses a third set of antenna elements and the fourth set of transmit channels uses a fourth set of antenna elements, the first set of transmit channels and the fourth set of transmit channels simultaneously transmit signals in a coordinated manner to a second geographic area using the same carrier frequency on the first frequency band or on a second frequency band, the second geographic area being a different geographic area or an overlapping geographic area than the first geographic area.
Identifying a terminal needing to use the first group of transmitting channels from terminals served by the second frequency band, and configuring a downlink channel of the terminal needing to use the first group of transmitting channels on a time-frequency resource formed by a second time interval and a second frequency band; or,
and identifying the terminal needing to use the first group of transmitting channels from the terminals served by the cell to which the third group of antenna units belong, and configuring the downlink channel of the terminal needing to use the first group of transmitting channels on the time-frequency resource consisting of the second time interval and the second frequency band.
The step of identifying the terminals requiring the use of the first set of transmission channels from among the terminals served in the second frequency band comprises at least one of the following methods:
identifying a terminal needing to use the first group of transmission channels by using a channel impulse response generated by a channel Sounding Reference Signal (SRS) sent by a terminal served by the second frequency band on the second frequency band;
and the channel measurement information reported by the terminal using the second frequency band service is obtained by measuring in a second time interval.
The step of using the channel impulse response generated by the sounding reference signal to identify the terminal needing to use the first group of transmission channels includes the following steps:
determining the terminal as a terminal requiring to use the first group of transmission channels on the second frequency band when the channel impulse response indicates that the terminal can receive the multi-stream transmission on the second frequency band and the required number of transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band; or,
and when the channel impact response indicates that the network side is required to transmit data to the terminal in a transmission diversity mode or a beam forming mode on the second frequency band, and the first group of transmission channels are configured on the second frequency band to reach the required transmission diversity or the number of channels to be used by beam forming, determining the terminal as the terminal which needs to use the first group of transmission channels on the second frequency band.
The step of identifying the terminal needing to use the first group of transmission channels by using the channel measurement information reported by the terminal served by the second frequency band comprises one of the following modes:
when the channel measurement information reported by the terminal indicates that the terminal can receive multi-stream transmission on the second frequency band and the number of the required transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band, the terminal is judged as the terminal which needs to use the first group of transmission channels on the second frequency band; or,
and when the channel measurement information reported by the terminal indicates that the transmission power or the transmission rate required by the terminal can be achieved only by configuring the first group of transmitting channels on the second frequency band, the terminal is judged as the terminal needing to use the first group of transmitting channels on the second frequency band.
The step of identifying a terminal requiring use of the first set of transmission channels from terminals served by a cell to which the third set of antenna elements belongs includes:
the terminal sends a channel detection reference signal to the third group of antenna units on the first frequency band or the second frequency band, and identifies the terminal which needs to use the first group of transmission channels on the third group of antenna units according to the channel impact response generated by the channel detection reference signal;
and the channel measurement information which is reported by the terminal in the cell to which the third group of antenna units belong and contains the signal information transmitted by the third group of antenna units is measured in a second time interval.
The channel measurement information reported by the terminal includes at least one of the following information:
the signal-to-interference ratio of a receiving channel on the first frequency band or the second frequency band in a second time interval of the terminal;
the terminal reports the channel quality information according to the measurement in the second time interval;
and the terminal reports the rank of the channel impact response matrix or the indication information of the rank of the channel impact response matrix according to the measurement in the second time interval.
Step S130, at least one transmitting channel in the first group of transmitting channels configured on the second frequency band is configured on the first frequency band in a third time interval after the second time interval; or at least one transmission channel in the first group of transmission channels configured on the third group of antenna units is configured on the first group of antenna units in the third time interval.
The second time interval is a time interval composed of downlink time slots included in a radio frame on the second frequency band or the third group of antenna units, and/or a time interval composed of sub-intervals of the downlink time slots included in the radio frame.
Determining the width and/or the starting position of the second time interval may be one or a combination of two of the following methods:
(1) determining a width and/or a starting position of a second time interval according to a duplex configuration on the first frequency band and/or the second frequency band;
(2) determining the width and/or the starting position of the second time interval according to the preset starting position and the time width;
(3) determining the width and/or the starting position of a second time interval according to the time width and the position of the idle time slot on the first frequency band;
(4) determining the width and/or the starting position of the second time interval according to the number of terminals needing to use and/or not needing to use the first group of transmission channels in a group of terminals served by the first frequency band or the total traffic data transmission rate of the terminals, and/or according to the number of terminals needing to use and/or not needing to use the first group of transmission channels in a group of terminals served by the second frequency band or the total traffic data transmission rate of the terminals; and
(5) the width and/or the starting position of the second time interval are determined according to the number of terminals needing to use and/or not needing to use the first group of transmission channels in a group of terminals served by the cell to which the first group of antenna units belong or the total traffic data transmission rate of the terminals, and/or according to the number of terminals needing to use and/or not needing to use the first group of transmission channels in a group of terminals served by the cell to which the third group of antenna units belong or the total traffic data transmission rate of the terminals.
The first group of antenna units, the third group of antenna units and the second group of antenna units are antenna units configured on the same site; the first group of transmission channels and the second group of transmission channels are transmission channels configured on the same site.
In the process of time division multiplexing transmission channels between different frequency bands or between different antenna units, the width and/or the starting position of the second time interval is determined according to the duplex configuration on the first frequency band and/or the second frequency band, and the method is specifically realized by one of the following implementation methods:
(1) under the condition that a first frequency band is a frequency band used in a time division duplex mode, and a second frequency band is a downlink frequency band used in a frequency division duplex mode, determining the starting position of a second time interval on the second frequency band in one or more time subintervals formed by uplink time slots on the first frequency band, wherein the width of the second time interval is smaller than or equal to the time subintervals;
(2) under the condition that a time interval in which an uplink time slot and a downlink time slot simultaneously appear exists between an uplink time slot of a time division duplex radio frame on the first frequency band and a downlink time slot of the time division duplex radio frame on the second frequency band, the starting position of a second time interval on the second frequency band is determined to be in the time interval in which the uplink time slot and the downlink time slot simultaneously appear, and the width of the second time interval is smaller than or equal to the time interval in which the uplink time slot and the downlink time slot simultaneously appear.
In the above process of time-sharing the transmission channels between different frequency bands or between different antenna units, the width and/or the starting position of the second time interval are determined according to the predetermined starting position and time width, and the process is implemented as follows:
assigning a group of downlink time slots as a second time interval on a radio frame on a second frequency band, and configuring downlink channels of terminals needing to use a first group of transmission channels on a time-frequency resource formed by the second time interval and the second frequency band according to the difference of the number of the transmission channels needing to be used among a group of terminals served by the second frequency band;
or, the following implementation process is adopted:
and allocating downlink channels of the terminals needing to use the first group of transmission channels in the second time interval contained in the wireless frame sent by the third group of antenna units according to the difference of the number of the transmission channels needing to be used among a group of terminals served by the cell to which the third group of antenna units belong.
In the process of time division multiplexing transmission channels between different frequency bands or between different antenna units, the second time interval is determined according to the time width and/or the starting position of the idle time slot on the first frequency band, and the specific implementation method may be:
and configuring the second time interval on a time interval consisting of idle time slots on the first frequency band, wherein the idle time slots are at least partially idle time slots on the first frequency band due to small downlink traffic load on the first frequency band, or are idle time slots on the first frequency band due to no downlink traffic activity on the first frequency band.
In the process of time division multiplexing the transmission channels between different frequency bands or between different antenna units, the width and/or the starting position of the second time interval are determined according to the number of terminals that need to use and/or do not need to use the first group of transmission channels in the group of terminals served by the first frequency band or the total traffic data transmission rate of such terminals, and/or according to the number of terminals that need to use and/or do not need to use the first group of transmission channels in the group of terminals served by the second frequency band or the total traffic data transmission rate of such terminals, which at least includes one of the following two methods.
The first method comprises the following steps:
step one, selecting a first class of terminals needing to use a first group of transmitting channels on a first frequency band from terminals served by the first frequency band;
and step two, determining the width of a first time interval according to the number of terminals needing to use the first group of transmission channels on the first frequency band or the total service data transmission rate of the terminals, and determining the starting position of a second time interval outside the first time interval.
The second method comprises the following steps:
step one, selecting a terminal needing to use a first group of transmitting channels on a second frequency band from terminals served by the second frequency band;
and step two, determining the width of the second time interval according to the number of terminals needing to use the first group of transmission channels on the second frequency band or the total service data transmission rate of the terminals.
The specific process of determining the position of the second time interval may be:
classifying terminals served by a first frequency band and a second frequency band, and configuring downlink channels of the terminals on the first frequency band which need to use the first group of transmitting channels and the terminals which do not need to use the first group of transmitting channels on different time slots; configuring downlink channels of terminals on a second frequency band which need to use the first group of transmitting channels and terminals which do not need to use the first group of transmitting channels on different time slots; ensuring that the time slot configurations of the terminals needing to use the first group of transmission channels on the first frequency band and the second frequency band are orthogonal in time; taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels on a first frequency band as a first time interval; taking a time interval formed by time slots occupied by the terminals needing to use the first group of transmitting channels on a second frequency band as a second time interval; the starting time of the second time interval is configured outside the first time interval.
The step of determining the width and/or the starting position of the second time interval according to the number of terminals that need to use and/or do not need to use the first group of transmission channels in a group of terminals served by the cell to which the first group of antenna units belongs or the total traffic data transmission rate of such terminals, and/or according to the number of terminals that need to use and/or do not need to use the first group of transmission channels in a group of terminals served by the cell to which the third group of antenna units belongs or the total traffic data transmission rate of such terminals includes at least one of the following two methods.
The first method comprises the following steps:
step one, selecting a terminal which needs to use a first group of transmitting channels on a first group of antenna units from a group of terminals which are served by a cell to which the first group of antenna units belong;
and secondly, determining the width of the first time interval according to the number of terminals needing to use the first group of transmitting channels on the first group of antenna units or the total service data transmission rate of the terminals, and determining the starting position of the second time interval outside the first time interval.
The second method comprises the following steps:
step one, selecting a terminal which needs to use a first group of transmitting channels on a third group of antenna units from a group of terminals which are served by a cell to which the third group of antenna units belongs;
and step two, determining the width of the second time interval according to the number of terminals using the first group of transmitting channels on the third group of antenna units or the total service data transmission rate of the terminals.
In the first method, the step of determining the starting position of the second time interval outside the first time interval includes:
configuring downlink channels of terminals which need to use the first group of transmission channels and terminals which do not need to use the first group of transmission channels in a group of terminals which are served by a cell to which the first group of antenna units belong on different time slots;
configuring downlink channels of terminals which need to use the first group of transmitting channels and terminals which do not need to use the first group of transmitting channels in a group of terminals which are served by a cell to which a third group of antenna units belongs on different time slots;
time slot configurations of a terminal needing to use the first group of transmission channels in a group of terminals served by a cell to which the first group of antenna units belong are orthogonal in time with time slot configurations of a terminal needing to use the first group of transmission channels in a group of terminals served by a cell to which the third group of antenna units belong;
taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels in a group of terminals which are served by a cell to which the first group of antenna units belongs as a first time interval;
taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels in a group of terminals which are served by a cell to which the third group of antenna units belongs as a second time interval;
the starting time of the second time interval is configured outside the first time interval.
In the process of time division multiplexing transmission channels between different frequency bands or between different antenna units, the coordinated transmission may be performed by simultaneously transmitting signals to the second geographic area in a coordinated manner in one of the following manners:
(1) transmitting signals to a second geographical area in a transmission diversity mode among the antennas;
(2) transmitting signals between the antennas in a multiple-input multiple-output (MIMO) manner to a second geographic area; and
(3) signals are transmitted between the antennas in a beamforming fashion to the second geographic area.
In the process of time-division multiplexing transmission channels between different frequency bands or between different antenna units, a specific implementation method of the method for multiplexing transmission channels between frequency bands may be:
the first time interval is a time interval formed by uplink time slots of a time division duplex system, the first frequency band is a frequency band used in a time division duplex mode, the second frequency band is a downlink frequency band used in a frequency division duplex mode or a frequency band used in a downlink one-way mode, the third time interval is a time interval formed by uplink time slots of the time division duplex system, the second group of transmission channels are transmission channels operating on the second frequency band according to the technical specification of an FDD system or transmission channels operating according to the technical specification of radio broadcasting, the transmission bandwidths and/or center frequencies of the first group of transmission channels are configured on the first frequency band and the second frequency band in a time division mode, and the second time interval of the first group of transmission channels for transmitting signals on the second group of frequency band is located in the time interval formed by the uplink time slots on the first frequency band.
In the process of time-division multiplexing transmission channels between different frequency bands or between different antenna units, a specific implementation method of the method for multiplexing transmission channels between frequency bands may be:
the first time interval is a time interval formed by uplink time slots of a time division duplex system, the first frequency band and the second frequency band are frequency bands used in a time division duplex mode, in the second time interval, an appearing time slot on the first frequency band is an uplink time slot or an idle time slot, an appearing time slot on the second frequency band is a downlink time slot, and transmission bandwidths and/or center frequencies of the first group of transmission channels are configured on the first frequency band and the second frequency band in a time division mode.
In the process of time-division multiplexing transmission channels between different frequency bands or between different antenna units, a specific implementation method of the method for multiplexing transmission channels between frequency bands may be:
the first time interval is a time interval formed by downlink time slots of the frequency division duplex system; the first frequency band and the second frequency band are both downlink frequency bands used in a frequency division duplex mode; or, the first time interval is a time interval composed of downlink time slots of the time division duplex system, and the first frequency band and the second frequency band are both frequency bands used in a time division duplex mode; in a second time interval, the time slot on the first frequency band is an idle time slot or a downlink time slot without using the first group of transmission channels, and the downlink time slot appearing on the second frequency band is a time slot configured to the following terminals:
(1) a terminal which needs a network side to use a first group of transmitting channels to increase the number of antennas for transmitting signals to the terminal; or
(2) A terminal which needs a network side to use a first group of transmitting channels to improve the transmitting power of the network side;
configuring the transmission bandwidth and/or the center frequency of the first group of transmission channels on the first frequency band and the second frequency band in a time division manner, wherein the specific configuration manner is one of the following manners:
(1) configuring a first set of transmit channels with a same wireless specification on a first frequency band and a second frequency band;
(2) the first set of transmit channels are configured with different wireless technology specifications over the first frequency band and the second frequency band.
In the process of time division multiplexing transmission channels between different frequency bands or between different antenna units, a specific implementation method of the method for multiplexing transmission channels between antenna units may be TDD-FDD inter-neighbor cell multiplexing, and specifically includes:
the first set of transmit channels uses a third set of antenna elements, the fourth set of transmit channels uses a fourth set of antenna elements, the third set of antenna elements is one of:
(1) antennas used by FDD systems;
(2) antennas used by TDD systems;
(3) TDD systems use antennas in conjunction with FDD systems.
The first time interval is a time interval composed of downlink time slots of a time division duplex system, the first frequency band is a frequency band used in a time division duplex mode, the second time interval is a time interval composed of downlink time slots of a system to which the third group of antenna units belong, the third group of antenna units transmit signals on the second frequency band, and the second frequency band is a downlink frequency band used in a frequency division duplex mode.
The fourth group of transmission channels is transmission channels operating on the second frequency band in compliance with the technical specification of the FDD system, the network side configures the transmission bandwidth and the center frequency of the first group of transmission channels on the first frequency band used by the first group of antenna units and the second frequency band used by the fourth group of antenna units in a time division manner, the second time interval of the first group of transmission channels for transmitting signals on the second frequency band is located in the time interval formed by the uplink time slots on the first frequency band, and the second geographical area covered by the third group of antenna units used by the first group of transmission channels for transmitting signals is a different geographical area or an overlapping geographical area with the first geographical area covered by the first group of antenna units for transmitting signals.
In the process of time-division multiplexing transmission channels between different frequency bands or between different antenna units, a specific implementation method of the method for multiplexing transmission channels between frequency bands may be:
the first group of transmission channels uses a third group of antenna units, the fourth group of transmission channels uses a fourth group of antenna units, and the first group of antenna units, the third group of antenna units and the fourth group of antenna units are antenna units used by an FDD system or antenna units used by a TDD system; the first group of antenna units and the third group of antenna units are antenna units covering different cells on the same site.
The first time interval is a time interval formed by downlink time slots of a frequency division duplex system or a time interval formed by the downlink time slots of a time division duplex system; the first group of transmitting channels transmits on the third antenna unit by using the first frequency band, or the first group of transmitting channels transmits on the third antenna unit by using the second frequency band, and in a second time interval, the time slot of the first group of transmitting channels transmitting signals on the third group of antenna unit is an idle time slot of a system to which the first antenna unit belongs or a time slot of the system to which the first antenna unit belongs, wherein the first group of transmitting channels does not use the first group of transmitting channels, and the downlink time slot appearing on the third group of antenna unit in the second time interval is a time slot configured to the following terminal:
(1) the time slot used by the terminal needing to use the first group of transmitting channels to increase the number of antennas for transmitting signals to the terminal;
(2) a time slot used by a terminal which needs to use a first group of transmission channels to improve the transmission power capable of being output by a network side;
and the first group of transmitting channels are switched between the first group of antenna units and the third group of antenna units in a time division manner.
The invention provides a method for scheduling transmission channels, which is suitable for multiplexing the transmission channels among different frequency bands or among different antenna units. As shown in fig. 2 and 7, it mainly includes the following steps:
step S210, classifying the terminals according to the difference of the terminals in using the antenna units, and classifying the terminals receiving signals in the second frequency band into the terminals requiring to use the first group of transmission channels and the terminals not requiring to use the first group of transmission channels according to the difference of the antenna units used when the terminals receive signals, specifically:
the following terminals are identified as terminals that do not need to use the first set of transmission channels on the second frequency band: only signals transmitted from antenna elements comprised in the second group of antenna elements need to be received or can be received in the second frequency band; and
the following terminals are judged as the terminals needing to use the first group of transmission channels:
(1) a terminal that only needs to receive or can only receive signals transmitted from antenna elements included in the first group of antenna elements or the third group of antenna elements on the second frequency band; or
(2) A terminal that receives signals transmitted from antenna elements included in the first or third groups of antenna elements on a second frequency band, while receiving signals transmitted from antenna elements included in the second group of antenna elements on a second frequency band; .
Step S220, determining a second time interval used by the terminal that needs to use the first group of transmission channels, selecting a subinterval within the following time interval as the second time interval, and configuring a downlink channel for the terminal that needs to use the first group of transmission channels within the second time interval:
(1) configuring a second time interval on a predetermined time slot on a wireless frame on a second frequency band, wherein the predetermined time slot is a time slot which is appointed on the second frequency band and is used for sending data to a terminal needing to use the first group of transmission channels, and the predetermined time slot is orthogonal to the residence time interval of the first group of transmission channels on the first frequency band in terms of time;
(2) determining a second time interval on a time interval occupied by the TDD uplink time slot on the first frequency band;
(3) determining a second time interval within an idle time interval on the first frequency band;
(4) a second time interval is determined outside the active time interval of the first set of transmit channels on the first frequency band, see fig. 7.
Step S230, assigning the first group of transmission channels to transmit using the third group of antenna units or using the first group of antenna units on the second frequency band in the second time interval; during transmission using the third set of antenna elements or the first set of antenna elements for the first set of transmission channels, the terminal using the first set of transmission channels is required to perform at least one of the following activities:
1) receiving service data from the antenna unit currently used by the first group of transmission channels;
2) and measuring channels between the antenna units currently used by the first group of transmission channels and the receiving antenna of the terminal.
The activation time interval of the first group of transmission channels on the first frequency band is a time interval determined according to the following method, see fig. 7:
dividing terminals receiving signals on a first frequency band into terminals requiring use of a first set of transmission channels and terminals not requiring use of the first set of transmission channels; specifically, the method comprises the following steps:
the following terminals are identified as terminals that do not need to use the first set of transmission channels:
only signals transmitted by antenna elements not comprising the first group of antenna elements need to be received or can be received in the first frequency band.
The following terminals are judged as the terminals needing to use the first group of transmission channels:
(1) only signals transmitted from the antenna elements comprised in the first group of antenna elements need to be received or can be received in the first frequency band; or
(2) Signals transmitted from antenna elements included in the first group of antenna elements are received on a first frequency band, while signals transmitted from antenna elements other than the first group of antenna elements are received on the first frequency band.
The activation time intervals for the first set of transmit channels on the first frequency band are configured to be at time intervals when a terminal using the first set of transmit channels is required to receive signals on the first frequency band.
The channel between the third group of antenna units and the receiving antenna of the terminal is measured, and the terminal measures one or more of the following parameters including the effect of the signal transmitted by the third group of antenna units:
(1) channel Quality Indication information (CQI);
(2) indication information (RI: rank indication) of the rank of the channel impulse response matrix;
(3) signal to interference ratio information.
Further, the terminal reports the measurement result and the network side uses the result for sending data to the terminal on the second frequency band within a second time interval of a second occurrence on the second frequency band.
Said assigning a first set of transmit channels to transmit using a third set of antenna elements on a second frequency band in a second time interval comprises:
a first set of transmit channels for transmitting on a first frequency band using a first set of antenna elements is scheduled to a second frequency band on which to transmit using a third set of antenna elements.
When the same antenna unit exists in the third group of antenna units and the first group of antenna units, the first group of transmission channels transmits on the same antenna unit by using different frequencies;
when the third set of antenna elements does not have the same antenna elements as the first set of antenna elements, the frequency bands used by the first set of antenna elements and the second set of antenna elements for transmission by the first set may be the same frequency band or different frequency bands.
Said assigning a first set of transmit channels to transmit in a second time interval using either a first set or a third set of antenna elements, comprising:
when the first group of transmission channels resides on the second frequency band for two adjacent times and uses the first group of antenna units for transmission, or when the first group of transmission channels uses the third group of antenna units for two adjacent times and transmits, the same local oscillator is used by the first group of transmission channels, so as to ensure that the carriers used in two second time intervals in which the first group of transmission channels sequentially appear on the same frequency band or on the same group of antenna units are continuous in phase.
Embodiments of the present invention provide a system for time-division multiplexing transmission channels, which is suitable for time-division multiplexing transmission channels between different frequency bands on the same group of antenna units, or time-division multiplexing transmission channels between different antenna units. As shown in fig. 8, the system may form a system of time division multiplexing transmission channels according to different application scenarios, and the system may be one of the following:
one way of constructing a system of time division multiplexed transmit channels is adapted to time division multiplex transmit channels between different frequency bands on the same set of antenna elements, the system comprising:
a first group of antenna units 801 including at least one antenna unit, a first group of transmission channels 804 including at least one transmission channel with adjustable frequency point and/or transmission bandwidth, a terminal scheduling unit 805, and a transmission channel scheduling unit 806 constitute a system for time division multiplexing transmission channels on the antenna units included in the same antenna array.
Wherein:
a terminal scheduling unit 805, configured to assign downlink channel resources to terminals that need to use the first group of transmit channels 804 on the second frequency band and/or the first frequency band, configure downlink channels of terminals that need to receive signals transmitted by the first group of transmit channels from the first group of antenna units on the first frequency band in a first time interval, and/or configure downlink channels of terminals that need to receive signals transmitted by the first group of transmit channels from the first group of antenna units on the second frequency band in a second time interval.
A transmitting channel scheduling unit 806, configured to configure the first group of transmitting channels 804 in a time division multiplexing manner between the first frequency band and the second frequency band, where the first group of transmitting channels 804 is in a state of being configured on the first frequency band in the first time interval, and the first group of transmitting channels 804 is in a state of being configured on the second frequency band in the second time interval.
The first group of transmission channels 804 is configured to adjust the center frequency of the transmission channels and/or the bandwidth of the transmission channels according to the control of the transmission channel scheduling unit 806, to form a second parameter configuration state 804a of the first group of transmission channels, and transmit signals to the terminal configured on the second time interval by the downlink channel on the second frequency band by using the first group of antenna units 801 in the second parameter configuration state 804 a.
The first set of transmit channels 804 transmit signals in one of the following ways:
(1) the first set of transmit channels 804 transmit independently on the second frequency band using the first set of antenna elements 801;
(2) the first group of transmit channels 804 uses the first group of antenna units 801 and the second group of antenna units 802 to cooperatively transmit in the second frequency band, and the second group of antenna units 802 and the first group of antenna units 801 belong to the same antenna array or are disposed at the same site; wherein the system further comprises the second set of antenna elements 802 comprising at least one antenna element;
(3) the first set of transmit channels transmits in the second frequency band using the first set of antenna elements 801 in cooperation with a fifth set of antenna elements disposed at an adjacent site to the first set of antenna elements, wherein the system further comprises the fifth set of antenna elements comprising at least one antenna element.
(II) the second mode of forming a system for time division multiplexing transmission channels, adapted to time division multiplexing transmission channels between different antenna elements, the system comprising:
a first group of antenna units 801 comprising at least one antenna unit, a third group of antenna units 803 comprising at least one antenna unit, a first group of transmission channels 804 comprising at least one transmission channel with adjustable frequency point and/or transmission bandwidth, a terminal scheduling unit 805, and a transmission channel scheduling unit 806 constitute a system for time division multiplexing transmission channels between the first group of antenna units belonging to the first antenna array and the third group of antenna units belonging to the second antenna array, the first antenna array and the second antenna array being used in different serving cells.
Wherein:
a terminal scheduling unit 805, configured to assign downlink channels of the terminals that need to use the third group of antenna units 803 in the second time interval on the first frequency band and/or the second frequency band, and/or assign downlink channels of the terminals that need to use the first group of antenna units 801 in the first time interval on the first frequency band.
A transmit channel scheduling unit 806, configured to configure the first group of transmit channels 804 in a time division multiplexing manner between the first group of antenna units 801 and the third group of antenna units 803, where the first group of transmit channels 804 is configured on the first group of antenna units 801 in a first time interval, and the first group of transmit channels 804 is configured on the third group of antenna units 803 in a second time interval.
A first group of transmitting channels 804, configured to adjust a center frequency of the transmitting channels and/or a bandwidth of the transmitting channels according to the control of the transmitting channel scheduling unit 806, to form a third parameter configuration state 804b, and use the third group of antenna units 803 to configure, on the first frequency band, the downlink channel to the terminal on the second time interval to transmit signals in the third parameter configuration state 804 b; or a fourth parameter configuration state 804c is formed, and the third set of antenna units 803 is used to transmit signals to the terminals configured on the downlink channel on the second time interval on the second frequency band in the third parameter configuration state 804 c.
In the first configuration of the system, the system may further include:
and a terminal classification unit for identifying the terminal needing to use the first group of transmission channels from the terminals served by the second frequency band and/or from the terminals served by the first frequency band.
In the second configuration of the system, the system may further include:
and the terminal classifying unit is used for identifying the terminal needing to use the first group of transmitting channels from the terminal served by the service cell to which the third group of antenna units belong and/or the terminal served by the service cell to which the first group of antenna units belong.
The terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels from terminals served in the second frequency band by using at least one of the following methods:
identifying a terminal requiring use of the first set of transmit channels using a channel impulse response generated by a channel sounding reference signal transmitted on a second frequency band by a terminal serving the second frequency band;
and the channel measurement information reported by the terminal using the second frequency band service is obtained by measuring the measurement information reported by the terminal needing to use the first group of transmission channels in a second time interval.
The terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels from terminals served in the first frequency band by using at least one of the following methods:
identifying a terminal requiring use of the first set of transmit channels using a channel impulse response generated by a channel sounding reference signal transmitted on the first frequency band by a terminal serving the first frequency band;
the channel measurement information reported by the terminal using the first frequency band service is obtained by measuring the measurement information reported by the terminal needing to use the first group of transmission channels in a first time interval.
The terminal classifying unit in the first system configuration is configured to determine the terminal as a terminal that needs to use the first group of transmission channels on the second frequency band when the channel impulse response indicates that the terminal can receive multi-stream transmission on the second frequency band and the required number of transmission streams can be achieved only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission.
The terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels by using channel measurement information reported by a terminal served in the second frequency band, in the following manner:
when the channel measurement information reported by the terminal indicates that the terminal can receive multi-stream transmission on the second frequency band and the number of the required transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission, the terminal is judged as the terminal needing to use the first group of transmission channels on the second frequency band; or,
when the channel measurement information reported by the terminal indicates that the transmission power or the transmission rate required by the terminal can be achieved only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission, the terminal is judged as the terminal needing to use the first group of transmission channels on the second frequency band.
The terminal classifying unit in the second system configuration mode is configured to send, by the terminal, a channel sounding reference signal to the third group of antenna units in the first frequency band or the second frequency band, and identify, according to a channel impulse response generated by the channel sounding reference signal, a terminal that needs to use the first group of transmission channels on the third group of antenna units; and/or using the channel measurement information which is reported by the terminal in the cell to which the third group of antenna units belong and does not contain the signal information transmitted by the third group of antenna units in the first time interval.
The channel measurement information reported by the terminal includes at least one of the following information:
a signal-to-interference ratio of a receiving channel on a first frequency band or a second frequency band in a first time interval by a terminal;
the terminal reports the channel quality information according to the measurement in the second time interval or the first time interval;
and the terminal reports the rank of the channel impact response matrix or the indication information of the rank of the channel impact response matrix according to the measurement in the second time interval.
The terminal classifying unit in the second system configuration is configured to identify a terminal that needs to use the first group of transmission channels on the third group of antennas by using at least one of the following methods:
when the signal-to-interference ratio or channel quality information of a receiving channel, which is reported by a terminal and measured in a first time interval, cannot meet the data transmission rate requested by the terminal, judging and identifying the terminal as the terminal needing to use a first group of transmitting channels on a third group of antennas;
and when the rank of the channel impulse response matrix measured in the second time interval or the indication information of the rank reported by the terminal indicates that the rank of the channel impulse response matrix can be reached only by using the first group of transmitting channels or the number of parallel transmission streams represented by the indication information of the rank, the terminal is judged as the terminal needing to use the first group of transmitting channels on the third group of antennas.
The first set of transmit channels 804 transmit signals in one of the following ways:
(1) the first set of transmit channels 804 transmit independently on the first frequency band or the second frequency band using the third set of antenna elements 803;
(2) a first group of transmission channels 804 uses a third group of antenna units 803 and a fourth group of antenna units 808 to perform cooperative transmission on a first frequency band or a second frequency band, and the fourth group of antenna units 808 and the third group of antenna units 803 are deployed on the same site to cover the same service cell; wherein the system further comprises the fourth set of antenna elements 808 comprising at least one antenna element;
(3) the first set of transmit channels 804 transmits in the first or second frequency band using the third set of antenna elements 803 in conjunction with a sixth set of antenna elements, which are antenna elements disposed at adjacent sites with the third set of antenna elements; wherein the system further comprises the sixth set of antenna elements including at least one antenna element.
In the first configuration, the terminal scheduling unit 805 is configured to select a terminal that needs to use the first group of transmission channels from terminals served in the second frequency band and/or the first frequency band according to the classification result of the terminal classification unit. Specifically, the terminal scheduling unit 805 is configured to configure a downlink channel in the second time interval for the selected terminal that needs to use the first group of transmission channels in the second frequency band, and/or configure a downlink channel in the first time interval for the selected terminal that needs to use the first group of transmission channels in the first frequency band.
In the second configuration, the terminal scheduling unit 805 is configured to configure a downlink channel in the second time interval for a terminal that needs to use the first group of transmission channels 804 on the first frequency band or the second frequency band through the third group of antenna units 803, and/or configure a downlink channel for a terminal that needs to use the first group of transmission channels 804 on the first frequency band through the first group of antenna units 801.
The terminal scheduling unit 805 is configured to select, according to the classification result of the terminal classification unit, a terminal that needs to use the first group of transmission channels from terminals served by the cell to which the third group of antenna unit 803 belongs and/or from terminals served by the cell to which the first group of antenna unit 801 belongs. Further, the terminal scheduling unit 805 is configured to configure a downlink channel in the second time interval for the selected terminal that needs to use the first group of transmission channels on the third group of antenna units, and/or configure a downlink channel in the first time interval for the selected terminal that needs to use the first group of transmission channels on the first antenna unit.
Referring to fig. 7, a sub-interval in the following time interval is selected as the second time interval 702, and a downlink channel is configured in the second time interval 702 for a terminal that needs to use the first group of transmission channels and is selected from terminals served by the cell to which the third group of antenna units 803 belongs:
configuring a second time interval on a predetermined time slot on a radio frame on a second frequency band;
determining a second time interval on a time interval occupied by the TDD uplink time slot on the first frequency band;
determining a second time interval within an idle time interval on the first frequency band; or
Determining a second time interval outside the active time interval of the first set of transmit channels on the first frequency band, as shown in fig. 7;
wherein the predetermined time slot is a time slot designated on the second frequency band for transmitting data to the terminal using the first set of transmit channels, and the predetermined time slot is orthogonal in time to dwell time intervals of the first set of transmit channels on the first frequency band.
In the second configuration, the transmission channel scheduling unit is configured to determine the second time interval by using at least one of the following manners:
configuring the second time interval on a preset time slot on a wireless frame sent by a system to which a third antenna unit belongs;
determining the second time interval on the time interval occupied by the uplink time slot of the time division duplex system configured on the first frequency band;
determining the second time interval within an idle time interval on a first frequency band; or,
determining the second time interval outside of an activation time interval of the first set of transmit channels on a first frequency band;
the predetermined time slot is a time slot designated on the third set of antenna elements for transmitting signals to the terminal using the first set of transmit channels, and the predetermined time slot is orthogonal in time to the dwell time interval of the first set of transmit channels on the first frequency band.
In the above, the first group of transmission channels used in the time division multiplexing manner may be one of the following combinations of circuit units:
(1) a radio frequency circuit unit including a radio frequency power amplifier;
(2) a radio frequency circuit unit including a radio frequency power amplifier, a D/A conversion circuit unit;
(3) the device comprises a radio frequency circuit unit comprising a radio frequency power amplifier, a D/A conversion circuit unit and a circuit unit for performing baseband processing on data to be transmitted;
(4) the radio frequency circuit unit comprises a radio frequency power amplifier, an intermediate frequency circuit unit corresponding to the radio frequency power amplifier, a D/A conversion circuit unit and a circuit unit for performing baseband processing on data to be transmitted.
In the above, when the first group of transmission channels resides on the second frequency band twice in a neighborhood and uses the first group of antenna units to transmit signals, or when the first group of transmission channels uses the third group of antenna units twice in a neighborhood, the same local oscillator is used by the first group of transmission channels, so as to ensure that the carriers used in two second time intervals in which the first group of transmission channels sequentially appear on the same frequency band or on the same group of antenna units are consecutive in phase.
In the first configuration, different antenna elements are used for transmitting signals to the terminal on the first frequency band and for receiving signals from the terminal on the first frequency band, and the antenna elements of the first group are antenna elements for transmitting signals to the terminal. The first group of transmitting channels use a first transmitting filter when transmitting signals to the terminal by using the first group of antenna units on a first frequency band, and the antenna units used for receiving signals on the first frequency band use a first receiving filter; wherein the first transmit filter and the first receive filter are different filters.
In the second configuration, the service cell to which the third group of antenna elements belongs transmits signals to the terminal serving the third group of antenna elements, and the third group of antenna elements transmits signals to the terminal using the first frequency band or the second frequency band in the cell to which the third group of antenna elements belongs, the antenna elements being different from the antenna elements used for receiving signals from the terminal. The first group of transmitting channels use a second transmitting filter when using a third group of antenna units to transmit signals to the terminal, and the service cell to which the third group of antenna units belongs uses a second receiving filter when receiving signals from the terminal in service; wherein the second transmit filter and the second receive filter are different filters.
In the prior art, the base station transmits signals and receives signals by a common antenna, and the defects of complex radio frequency structure, large radio frequency loss of a channel and inconvenience for time division multiplexing of the transmitting channel exist. From the view of TDD and FDD hybrid networking, a set of TDD antenna and a set of FDD antenna exist originally, under the configuration of the system antenna, the function of transmitting signals is realized by one set of antenna, and the function of receiving signals is realized by the other set of antenna, so that the comprehensive performance of signal transmission, signal reception and the like is improved on the premise of not increasing the number of the antennas. The system structure with separated transmitting and receiving antennas is particularly suitable for being applied to a system composition mode I, in the system composition mode I, an FDD system and a TDD system share a transmitting antenna, the transmitting antenna and a receiving antenna of the TDD system are different antenna units which are separately deployed, and working frequency points and working bandwidths of a first group of transmitting channels are configured on a frequency band of the TDD system and a frequency band of the FDD system in a time division mode; or the transmitting antenna is shared on two TDD frequency bands with enough isolation bandwidth, the transmitting antenna and the receiving antenna on the two TDD frequency bands are different antenna units which are separately deployed, and the working frequency point and the working bandwidth of the first group of transmitting channels are configured on the two TDD frequency bands in a time division mode.
In the second configuration, the first group antenna element and the third group antenna element use the same or different frequency bands.
Referring to fig. 3(a) and fig. 3(b), the first frequency band is a TDD frequency band for performing bidirectional transmission in a time division manner, and the second frequency band is a downlink frequency band in an FDD frequency band for performing transmission in a frequency division manner.
Specifically, the first frequency band is a TDD frequency band located in a frequency range of 2570-2620 MHz, or a TDD frequency band located in a frequency range of 2010-2025 MHz, or a TDD frequency band located near 700MHz, or an idle frequency band of a terrestrial television broadcast frequency band which is not used by a television broadcast system; the second frequency band is an FDD downlink frequency band within a frequency band range of 2500-2690 MHz, or an FDD downlink frequency band near 2G, or an FDD frequency band near 700MHz, or a free frequency band which is not used by a television broadcasting system in a terrestrial television broadcasting frequency band.
The first time interval is a time interval formed by downlink time slots in a TDD radio frame in a first frequency band, and in the first time interval, there are 8 transmission channels for transmitting radio frequency signals on 8 different antennas on the downlink time slots of the TDD radio frame in the first frequency band, where the specific transmission mode is a beamforming mode.
The second time interval is a time interval formed by downlink time slots in the FDD radio frame on the second frequency band, in the second time interval, the first and second transmission channels in the 8 transmission channels configured on the first frequency band on the first time interval are configured on the second frequency band, and the third and fourth transmission channels in the 8 transmission channels configured on the first frequency band on the first time interval are configured on the third frequency band.
The transmission time slots of the third transmission channel and the fourth transmission channel on the third frequency band are aligned with the time slots of the first group of transmission channels and the second transmission channel on the second frequency band, or are staggered in time.
The first set of transmit channels and the second set of transmit channels may be operated in a space-time coded manner in the second frequency band in cooperation with other transmit channels in the second frequency band, or in cooperation with other transmit channels in a transmit diversity manner.
And keeping a determined time delay relation between the time slot of the TDD radio frame on the first frequency band and the time slot of the FDD radio frame on the second frequency band, wherein specifically, the time difference between the first time slot of the radio frame on the first frequency band and the first time slot on the second radio frame is kept a fixed value, or the error of the time difference is less than a preset range.
An LTE TDD system is deployed on the first frequency band, an LTE FDD system is deployed on the second frequency band, or a UMTS HSDPA system is deployed on the second frequency band.
For an example of the method for sharing a transmission channel on two non-adjacent TDD frequency bands according to the embodiment of the present invention, referring to fig. 4(a) and fig. 4(b), the first frequency band and the second frequency band are both frequency bands for performing bidirectional transmission in a Time Division Duplex (TDD) manner. Specifically, the first frequency band and the second frequency band are a combination between the following TDD frequency bands:
(1) a TDD frequency band located in a frequency range of 2570-2620 MHz;
(2) a TDD frequency band located in the range of 2010-2025 MHz;
(3) TDD band located around 700 MHz;
(4) a band used in TDD mode is selected from an idle band in a terrestrial television broadcasting band which is not used by a television broadcasting system.
The uplink and downlink time slots in the TDD radio frame on the first frequency band and the uplink and downlink time slots in the TDD radio frame on the second frequency band are configured asynchronously, that is, in the time slots included in the TDD radio frame on the first frequency band, at least in the time interval in which one uplink time slot/downlink time slot occurs, what appears on the radio frame on the second frequency band is the downlink time slot/uplink time slot.
The first time interval is a time interval formed by downlink time slots in a TDD radio frame in a first frequency band, and in the first time interval, there are 8 transmission channels for transmitting radio frequency signals on 8 different antennas on the downlink time slots of the TDD radio frame in the first frequency band, where the specific transmission mode is a beamforming mode or a multi-stream parallel transmission MIMO mode.
The second time interval is a time interval formed by downlink time slots in a TDD radio frame on a second frequency band, and in the second time interval, a part of or all of the 8 transmission channels configured on the first frequency band in the first time interval are selected as a first group of transmission channels, and the first group of transmission channels are configured on the second frequency band, where the second time interval is a time interval formed by TDD downlink time slots on the second frequency band having the following two conditions:
(1) is a time interval formed by downlink time slots on a second wireless frame;
(2) and the time interval occurs in a time interval formed by uplink time slots of the TDD radio frame in the first frequency band.
In a second time interval, the first group of transmission channels cooperate in a second frequency band in a transmission diversity mode, or in a beamforming mode, or in a multi-stream parallel transmission (MIMO) mode; alternatively, the first set of transmit channels may be coordinated with other transmit channels in the second frequency band in transmit diversity, or in beamforming, or in multi-stream parallel transmission (MIMO) over the second frequency band.
And keeping a determined time delay relation between the time slot of the TDD radio frame on the first frequency band and the time slot of the TDD radio frame on the second frequency band, specifically, keeping a time difference between the first time slot of the radio frame on the first frequency band and the first time slot on the second radio frame to be a fixed value, or keeping an error of the time difference to be less than a preset range.
The first frequency band is deployed with an LTE/LTE-A TDD system, or the first frequency band is deployed with a first TDD system, the second frequency band is deployed with a second TDD system, and the first TDD system and the second TDD system belong to different wireless technical specifications.
Referring to fig. 5(a) and 5(b), the first frequency band and the second frequency band are both downlink frequency bands used in a Frequency Division Duplex (FDD) manner, or are frequency bands on downlink transmission time slots used in a Time Division Duplex (TDD) manner, and this embodiment is applicable to time division multiplexing transmission channels between downlink time slots simultaneously appearing on the first frequency band and the second frequency band in a TDD multi-carrier/multi-band system, and the specific method is similar to the time division multiplexing transmission channels between FDD multi-band systems.
The multi-carrier system using the same wireless technology described in this embodiment is an LTE TDD/FDD multi-band (carrier) aggregation system discussed in 3GPP, or an umts HSDPA multi-band (carrier) aggregation system discussed in 3GPP, such as non-continuous 4-carrier HSDPA (NC _4C _ HSDPA) now discussed in 3 GPP.
Specifically, the first frequency band and the second frequency band are one of the following FDD frequency bands:
the first frequency band and the second frequency band are two sub-frequencies used by carrier aggregation in an FDD LTE multi-carrier system on a continuous frequency band or a discontinuous frequency band, the discontinuous frequency band is inter-band non-continuous (inter-band non-continuous) or Intra-band non-continuous (Intra-band non-continuous), the first frequency band is covered by a transmission bandwidth of a first group of transmission channels, the second frequency band is covered by a transmission bandwidth of a second group of transmission channels, and the transmission bandwidths of the first group of transmission channels and the second group of transmission channels do not cover the first frequency band and the second frequency band at the same time due to the limitation of technical implementation or the requirement of system configuration;
the first frequency band and the second frequency band are two sub-frequencies used by a UMTS HSDPA multi-carrier system through carrier aggregation on a discontinuous frequency band, the discontinuous frequency band is Inter-band discontinuous (Inter-band-discontinuous) or Intra-band discontinuous (Intra-band non-continuous), and the specific Intra-band discontinuous spectrum using mode is a non-continuous 4-carrier HSDPA spectrum using mode (NC-4C-HSDPA); the first frequency band is covered by the transmission bandwidth of the first group of transmission channels, the second frequency band is covered by the transmission bandwidth of the second group of transmission channels, and the transmission bandwidth of the first group of transmission channels and the transmission bandwidth of the second group of transmission channels do not cover the first frequency band and the second frequency band simultaneously due to the limitation of technical implementation or the requirement of system configuration.
The first time interval is a time interval formed by downlink time slots in an FDD radio frame on a first frequency band, in the first time interval, on the downlink time slot of the FDD radio frame on the first frequency band, 4 transmission channels transmit radio frequency signals on 4 different antenna units, the specific transmission mode is a transmission diversity mode, or a beamforming mode, or a multi-stream parallel transmission (MIMO) mode to work cooperatively, the 4 antenna units are composed of a first antenna unit, a second antenna unit, a third antenna unit and a fourth antenna unit, meanwhile, a second group of transmission channels on a second frequency band uses the third antenna unit and the fourth antenna unit to transmit signals, and the second group of transmission channels includes two transmission channels: a third transmit path using a third antenna element and a fourth transmit path using a fourth antenna element.
The second time interval is a time interval formed by downlink time slots in the FDD radio frame on the second frequency band, in the second time interval, a first group of transmission channels configured on the first frequency band on the first time interval are configured on the second frequency band to transmit signals by using the first antenna unit and the second antenna unit, and the first group of transmission channels comprise a first group of transmission channels using the first antenna unit and a second group of transmission channels using the second antenna unit on the first frequency band. In a second time interval, the first group of transmission channels cooperate in a second frequency band in a transmission diversity mode, or in a beamforming mode, or in a multi-stream parallel transmission (MIMO) mode; alternatively, the first set of transmit channels and the second set of transmit channels on the second frequency band may cooperate in transmit diversity, or in beamforming, or in multi-stream parallel transmission (MIMO) on the second frequency band.
The specific method for determining the second time interval is as follows:
and maintaining a determined time delay relationship between the time slot of the FDD radio frame on the first frequency band and the time slot of the FDD radio frame on the second frequency band, specifically, maintaining a fixed value for a time difference between the first time slot of the radio frame on the first frequency band and the first time slot of the second radio frame, or keeping an error of the time difference smaller than a predetermined range.
Referring to fig. 5, in an example of a method for time division multiplexing transmission channels in a multi-antenna system including different wireless technologies, a first frequency band and a second frequency band are both downlink frequency bands used in a Frequency Division Duplex (FDD) manner, specifically, the first frequency band is a frequency band used by an LTE FDD multi-antenna system discussed in 3GPP, the second frequency band is a frequency band used by an UMTS HSDPA multi-antenna system discussed in 3GPP, and a configuration manner of a first group of transmission channels on the first frequency band and the second frequency band is as follows: the first set of transmission channels configures transmission bandwidth and transmission power thereof on a first frequency band in compliance with the LTE FDD specification, the first set of transmission channels conforms to the UMTS specification on a second frequency band, and the transmission bandwidth of the first set of transmission channels in a first time interval covers only the first frequency band and does not cover the second frequency band due to the limitation of technology implementation or the requirement of system configuration.
The first time interval is a time interval formed by downlink time slots in an FDD LTE radio frame on a first frequency band, in the first time interval, on a downlink time slot of the FDD LTE radio frame on the first frequency band, 4 transmission channels transmit radio frequency signals on 4 different antenna units, specifically, the transmission mode is a transmission diversity mode, or a beamforming mode, or a multi-stream parallel transmission (MIMO) mode, the 4 antenna units are composed of a first antenna unit, a second antenna unit, a third antenna unit and a fourth antenna unit, meanwhile, a second group of transmission channels on a second frequency band use the third antenna unit and the fourth antenna unit to transmit signals according to UMTS HSDPA technical specifications, and the second group of transmission channels includes two transmission channels: a third transmit path using a third antenna element and a fourth transmit path using a fourth antenna element.
And the second time interval is a time interval formed by downlink time slots in the FDD HSDPA wireless frame on the second frequency band, and in the second time interval, a first group of transmission channels configured on the first frequency band on the first time interval are configured on the second frequency band to transmit signals by using the first antenna unit and the second antenna unit, and the first group of transmission channels comprise a first group of transmission channels using the first antenna unit and a second group of transmission channels using the second antenna unit on the first frequency band. In a second time interval, the first group of transmission channels cooperate with each other in a second frequency band in a transmission diversity mode, or in a beamforming mode, or in a multi-stream parallel transmission (MIMO) mode, and the multi-antenna technical specification of the UMTS HSDPA is conformed in the implementation of cooperative transmission; alternatively, the first set of transmit channels and the second set of transmit channels on the second frequency band may cooperate in transmit diversity, or in beamforming, or in multi-stream parallel transmission (MIMO) on the second frequency band, and the first set of transmit channels and the second set of transmit channels in implementing cooperative transmission comply with the multi-antenna specification of UMTS HSDPA.
The specific method for determining the second time interval is as follows:
and keeping a determined time delay relation between the time slot of the FDDLTE/LTE-A wireless frame on the first frequency band and the time slot of the UMTSHSDPA wireless frame on the second frequency band, wherein specifically, the time difference between the first time slot of the wireless frame on the first frequency band and the first time slot on the second wireless frame is kept a fixed value, or the error of the time difference is less than a preset range.
The method for time-division multiplexing the transmit channels according to this embodiment is suitable for implementing time-division multiplexing of transmit channels in a Multi-Standard Radio (MSR) system discussed in 3GPP at present. The first group of transmission channels belong to the same MSR RRU or the transmission channels in the same active antenna array.
Referring to fig. 6, a method for time division multiplexing transmission channels between multiple antenna systems adjacent to a coverage area deployed at a common site is shown.
The co-site deployed multi-antenna system is a multi-antenna system complying with the same wireless technical specification in adjacent coverage areas, and the specific system is one of the following:
(1) FDDLTE/LTE-A system using single carrier or multiple carriers in a geographical area covered by the system;
(2) a TDDLTE/LTE-A system using single carrier or multiple carrier in a geographical area covered by the system;
(3) FDD umts hsdpa systems using single or multiple carriers in one geographical area covered by the system.
A first antenna array for covering a first geographical area (serving cell), a second antenna array for covering a second geographical area (serving cell), and a third antenna array for covering a third geographical area (serving cell); a first antenna array, a second antenna array and a third antenna array are deployed at a common site, and each antenna array comprises a plurality of independent antenna units; the first geographical area (serving cell), the second geographical area (serving cell), and the third geographical area (serving cell) are cells in which a neighboring relationship exists in the geographical area.
The first antenna array is used to cover frequencies of a first geographical area (serving cell), the second antenna array is used to cover frequencies of a second geographical area (serving cell), and the third antenna array is used to cover frequencies of a third geographical area (serving cell), which may be the same frequencies or different frequencies.
This embodiment provides an example of a method for time-division multiplexing transmission channels among the first antenna array, the second antenna array, and the third antenna array.
A method of time-division multiplexing transmit channels among different antenna arrays may be:
the implementation method of the time division multiplexing transmission channel among the first antenna array, the second antenna array and the third antenna array can be carried out according to the following steps:
determining a first dwell time of a first group of transmit channels on a first antenna array, a second dwell time on a second antenna array, and a third dwell time on a third antenna array, wherein there is no overlap in time between the first dwell time, the second dwell time, and the third dwell time;
secondly, classifying the terminals in the cells covered by the first antenna array, the second antenna array and the third antenna array, and respectively configuring downlink channels of the terminals needing to use a second transmitting channel in the area covered by each antenna array on a first residence time interval, a second residence time interval and a third residence time interval;
in the third step, the first group of transmission channels: the signals are transmitted using antenna elements in the first antenna array over a first dwell time interval, using antenna elements in the second antenna array over a second dwell time interval, and using antenna elements in the third antenna array over a third dwell time interval.
The method of determining the dwell time of the first set of transmit channels on an antenna array may be:
the time slots of the radio frames on the first antenna array, the second antenna array and the third antenna array keep a determined time delay relationship in time, and specifically, the time difference between the time slots of the radio frames sent on the three antenna arrays is a fixed value, or the error of the time difference is smaller than a predetermined range.
The embodiment of the invention provides a method for time division multiplexing a transmitting channel between systems deployed at adjacent sites.
A first system for transmitting signals in a first frequency band is deployed at a first site, a second system for transmitting signals in a second frequency band is deployed at a second site, and there are antenna elements at the first site having an effective bandwidth covering the second frequency band.
The first system at the first site is the following:
a system operating in compliance with TDD LTE/LTE-a system specifications using an array antenna on a first frequency band.
Deployed at a second site adjacent to the first site is one or both of the following systems:
(1) a system operating in compliance with FDD LTE/LTE-A system specifications using an array antenna on a second frequency band;
(2) using an array antenna on the second frequency band in compliance with an FDD UMTS HSDPA system;
(3) and a system operating in compliance with the TDD LTE/LTE-A system specification using the array antenna on the second frequency band, wherein in the downlink time slot of the TDD radio frame, at least one downlink time slot appears in the time interval of the uplink time slot in the TDD radio frame at the first site.
A method for time division multiplexing a transmitting channel with a system deployed by a different station can be carried out according to the following steps:
the method comprises the steps of firstly, determining a first residence time of a first group of transmitting channels on a first group of antenna units used by TDD at a first site, and determining a second residence time of the first group of transmitting channels on a third group of antenna units located at the first site and covering a second frequency band by an effective bandwidth, wherein the first residence time and the second residence time do not overlap in time.
The first dwell is a time interval formed by downlink time slots of the TDD system, and the second dwell is a time interval configured in the following time interval:
(1) a time interval consisting of uplink time slots contained in a TDD downlink radio frame on a first station address;
(2) and scheduling a time interval formed by the downlink time slots used by the terminals which are not suitable for the first group of transmitting channels in the downlink time slots of the TDD wireless frame on the first station address.
In the second step, the first group of transmitting channels transmits signals on the third group of antenna units in a manner of residing in turn: signals are transmitted using a first set of antenna elements at a first site for a first dwell time interval and signals are transmitted using a third set of antenna elements at the first site for a second dwell time interval over a second frequency band.
The first set of transmit channels transmit signals over the third set of antenna elements in transmit diversity with a second system at a second site, or in multi-stream parallel transmission (MIMO).
Furthermore, the TDD system terminal scheduling unit at the first site configures a downlink channel for the terminal using the first group of transmission channels according to a first dwell of the predetermined first group of transmission channels on the first antenna, and the transmission channel scheduling unit schedules the first group of transmission channels to a third group of antenna units at the first site according to a predetermined second dwell time; or,
the transmitting channel scheduling unit allocates a first group of transmission on the first group of antenna units according to the first residence time of the first group of transmitting channels on the first antenna, which is determined by the terminal scheduling unit of the TDD system on the first site through classified scheduling of the terminal, and the transmitting channel scheduling unit schedules the first group of transmitting channels to a third group of antenna units on the first site according to the second residence time of the first group of transmitting channels needed by the system on the second site. The network side acquires the time interval of the first group of transmission channels used by the second system on the second station site, and determines the residence time of the first group of transmission channels on the three groups of antenna units by combining the time interval of the first group of transmission channels used by the TDD system on the first station site.
Referring to fig. 2 and 7, an example of a method for scheduling a transmission channel according to an embodiment of the present invention mainly includes:
and step one, classifying the terminals according to the difference of the terminals on the antenna units.
Terminals that receive signals in the second frequency band are classified into first class terminals and second class terminals according to the difference of antenna elements used when they receive signals, and, specifically,
the second type of terminals in the second frequency band are terminals 2, 3, 4, 5, 6, 9, 10 shown in fig. 7, which only need to receive or can only receive signals transmitted from antenna elements included in a second group of antenna elements, the number of which is a second integer (i.e., two), in the second frequency band;
the first type of terminals in the second frequency band are terminals 1, 7, 8, 12 and terminal 11 shown in fig. 7, where terminal 11 is a signal that only needs to be transmitted from an antenna unit included in a third group of antenna units whose number of independent antenna units is a third integer (in this embodiment, the third integer is 2); the terminals 1, 7, 8, 12 receive signals transmitted from antenna elements included in a second group of antenna elements having a second integer number of independent antenna elements in a second frequency band, and at the same time, the terminals 1, 7, 8, 12 receive signals transmitted from antenna elements included in the third group of antenna elements in the second frequency band.
And step two, determining a second time interval used by the first class of terminals.
Specifically, referring to fig. 7, the predetermined time width is taken as 2 time slots included in the FDD downlink radio frame on the second frequency band, and the time slots are located in a time interval included in the uplink time slot of the TDD radio frame on the first frequency band, and a downlink channel is configured for the first type terminal in the second time interval 702.
Step three, assign the first set of transmit channels to transmit using the third set of antenna units on the second frequency band in the second time interval 702.
And, during the period that the first group of transmission channels uses the third group of antenna elements for transmission, at least one terminal in the terminals 1, 7, 8, 12 measures the channel between the third group of antenna elements and the receiving antenna of the terminal, so as to use the first group of transmission channels and the third group of antenna elements for transmitting signals when the next second time interval occurs.
The system example of the time division multiplexing transmission channel of the embodiment of the invention provides a system constitution embodiment of multiplexing the transmission channel by the following two modes:
(1) a system for time division multiplexing the transmit channels between different frequency bands;
(2) a system for time division multiplexing transmit channels between different antenna elements.
Referring to fig. 8, a schematic diagram of a system for time division multiplexing transmission channels between different frequency bands according to an embodiment of the present invention mainly includes:
a first group of antenna elements 801 comprising a first antenna element and a second antenna element;
a second group of antenna elements 802 comprising a third antenna element and a fourth antenna element;
the transmit channel frequency and/or bandwidth of the first set of transmit channels 804 may be adjusted between a first parameter configuration state and a second parameter configuration state 804 a;
a terminal scheduling unit 805 is a functional unit on the network side, and in this embodiment, is a radio resource control unit in a baseband processing unit (BBU) and in a system of a time division multiplexing transmission channel, and can be implemented by adding a function of performing classified scheduling on downlink channels of a terminal according to the present invention on the basis of an existing MAC layer scheduler;
one transmit channel scheduling unit 806, in this embodiment, is a unit co-sited or co-antenna mounted with the first set of transmit channels.
In this embodiment, the antenna unit and the first group of transmission channels form an integrated antenna, and the antenna unit included in the same antenna array time-division multiplexes the first group of transmission channels.
The terminal scheduling unit 805 is configured to schedule the first class of terminals that need to receive signals from the first group of antenna units to a second time interval on the second frequency band by performing classified scheduling on downlink channels of the terminals on the second frequency band and/or the first frequency band.
Wherein the first frequency band and the second frequency band are one of the following frequency band combinations:
(1) the first frequency band is a TDD frequency band and the second frequency band is an FDD frequency band;
(2) the first frequency band is a TDD frequency band and the second frequency band is a TDD frequency band;
(3) the first frequency band is an FDD frequency band and the second frequency band is an FDD frequency band.
The transmission channel scheduling unit 806 is configured to assign the first group of transmission channels 804 to the terminal in the second time interval and configured to the downlink channel in the second time interval to transmit signals.
The first group of transmission channels 804 is configured to adjust the center frequency of the transmission channel and/or the bandwidth of the transmission channel according to the control of the transmission channel scheduling unit 806, to form a second parameter configuration state 804a of the first group of transmission channels, and the first group of transmission channels transmits signals to the terminal on the second frequency band using the first group of antenna units 801 in the second parameter configuration state 804 a.
Further, during the configuration of the first group of transmission channels to the second frequency band, the baseband processing resources corresponding to the first group of transmission channels are also configured to the second frequency band, so that not only the sharing of the first group of transmission channels between the first frequency band and the second frequency band, but also the sharing of the baseband processing resources between the first frequency band and the second frequency band is realized.
Referring to fig. 8, a system for time-division multiplexing transmission channels between different antenna units according to an embodiment of the present invention mainly includes:
a first group of antenna elements 801 including a first antenna element and a second antenna element covering a first serving cell;
a third group 803 of antenna elements including a first antenna element and a second antenna element covering a second serving cell;
the transmit channel frequency and/or bandwidth of the first set of transmit channels 804 may be adjusted between a first parameter configuration state and a second parameter configuration state 804b, or between a first parameter configuration state and a third parameter configuration state 804 c;
a terminal scheduling unit 805 is a functional unit on the network side, and in this embodiment, is a radio resource control unit located in a baseband processing unit (BBU) in a system of time division multiplexing transmission channels among antenna units, and can be implemented by adding the function of performing classified scheduling on downlink channels of terminals according to the present invention on the basis of an existing MAC layer scheduler;
a transmit channel scheduling unit 806, which in this embodiment is a unit co-located or co-located with the first set of transmit channels, is typically located within a Remote Radio Unit (RRU) module.
In this embodiment, the first and third groups of antenna elements are co-site mounted. And time division multiplexing a first group of transmitting channels between a first group of antenna units belonging to the first antenna array and a third group of antenna units belonging to the second antenna array, wherein the first antenna array and the second antenna array are used for different service cells.
The terminal scheduling unit 805 is configured to schedule a first class of terminals that need to receive signals from the third group of antenna units to a second time interval on the first frequency band or the second frequency band by performing classified scheduling on downlink channels of terminals served by the third group of antenna units and/or the first group of antenna units on the first frequency band or the second frequency band.
The transmit channel scheduling unit 806 is configured to assign the first group of transmit channels 804 to a second time interval, and the first group of transmit channels 804 transmit signals to the terminals configured with the downlink channels on the second time interval on the first frequency band or the second frequency band by using the third group of antenna units.
The first group of transmission channels 804 is configured to adjust a center frequency of the transmission channels and/or a bandwidth of the transmission channels according to the control of the transmission channel scheduling unit 806, form a third parameter configuration state 804b of the first group of transmission channels, and transmit signals to the terminal on the first frequency band.
The first group of transmission channels described in this embodiment is a circuit unit including a radio frequency power amplifier, the size of the transmission bandwidth of the radio frequency channel may be adjusted, at least one physical carrier may be sent within the transmission bandwidth, and the transmission channels operating on the same frequency band output radio frequency power to different antenna units at the same frequency.
The wireless specification supported by the transmit channel on the first frequency band is a different specification or the same specification as the specification supported on the second frequency band.
Further, during the configuration of the first group of transmission channels to the second frequency band, the baseband processing resources corresponding to the first group of transmission channels are also configured to the second frequency band, so that not only the sharing of the first group of transmission channels between the first frequency band and the second frequency band, but also the sharing of the baseband processing resources between the first frequency band and the second frequency band is realized.
The first group of radio frequency channels may be transmission channels for microcell coverage or transmission channels for macrocell coverage. The method of the invention can comprise the following steps: an antenna unit and a transmitting channel on the macro base station; the antenna unit and the transmitting channel on the micro base station, and the antenna unit and the transmitting channel on the repeater.
According to the method for time division multiplexing the transmission channels between different frequency bands or between different antenna units, the method for time division multiplexing the reception channels between different frequency bands or between different antenna units on the wireless access point can be directly derived, and in view of such derivation relationship, the specific method for realizing time division multiplexing of the reception channels on the network side is not discussed in the present invention, also in view of the fact that the reception channels are easy to realize large reception channel bandwidth (much larger than the transmission channel bandwidth) and the cost of the reception channels is significantly lower than that of the transmission channels.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.
Claims (48)
1. A method of time-division multiplexing transmit channels, wherein,
transmitting signals over a first frequency band at a first channel bandwidth to a first geographic area through a first set of antenna elements using a first set of transmit channels during a first time interval;
using the first set of transmit channels on a second frequency band for a second time interval after the first time interval; or, transmitting signals on a third set of antenna elements using the first set of transmit channels;
wherein the passband width of the first channel is less than or equal to the width of a first frequency band in a first time interval, and the second frequency band is a frequency band outside the first frequency band.
2. The method of claim 1, wherein,
configuring at least one transmit channel of the first set of transmit channels configured on the second frequency band onto the first frequency band in a third time interval after the second time interval; or
And configuring at least one transmission channel in the first group of transmission channels configured on the third group of antenna units to the first group of antenna units in the third time interval.
3. The method of claim 1, wherein,
identifying a terminal needing to use the first group of transmitting channels from terminals served by the second frequency band, and configuring a downlink channel of the terminal needing to use the first group of transmitting channels on a time-frequency resource formed by a second time interval and a second frequency band; or,
and identifying the terminal needing to use the first group of transmitting channels from the terminals served by the cell to which the third group of antenna units belong, and configuring the downlink channel of the terminal needing to use the first group of transmitting channels on the time-frequency resource consisting of the second time interval and the second frequency band.
4. The method of claim 3, wherein the step of identifying the terminals requiring use of the first set of transmission channels from among the terminals served in the second frequency band comprises at least one of:
identifying a terminal requiring use of the first set of transmit channels using a channel impulse response generated by a channel sounding reference signal transmitted on a second frequency band by a terminal serving the second frequency band;
and channel measurement information reported by the terminal using the second frequency band service is obtained by measuring in a second time interval.
5. The method of claim 4, wherein the step of using the channel impulse response generated by the sounding reference signal to identify the terminal needing to use the first set of transmission channels comprises the method of:
determining the terminal as a terminal requiring to use the first group of transmission channels on the second frequency band when the channel impulse response indicates that the terminal can receive the multi-stream transmission on the second frequency band and the required number of transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band; or,
and when the channel impact response indicates that the network side is required to transmit data to the terminal in a mode of transmitting diversity or beamforming on the second frequency band, and the first group of transmitting channels are configured on the second frequency band only to reach the required number of channels to be used by the transmitting diversity or beamforming, determining the terminal as the terminal which needs to use the first group of transmitting channels on the second frequency band.
6. The method of claim 4, wherein the step of identifying the terminal using the first set of transmission channels by using the channel measurement information reported by the terminal using the second frequency band service comprises:
when the channel measurement information reported by the terminal indicates that the terminal can receive multi-stream transmission on the second frequency band and the number of the required transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band, the terminal is judged as the terminal which needs to use the first group of transmission channels on the second frequency band; or,
and when the channel measurement information reported by the terminal indicates that the transmission power or the transmission rate required by the terminal can be achieved only by configuring the first group of transmitting channels on the second frequency band, the terminal is judged as the terminal needing to use the first group of transmitting channels on the second frequency band.
7. The method of claim 3, wherein the step of identifying the terminal needing to use the first set of transmission channels from the terminals served by the cell to which the third set of antenna elements belongs comprises:
the terminal sends a channel detection reference signal to the third group of antenna units on the first frequency band or the second frequency band, and identifies the terminal which needs to use the first group of transmission channels on the third group of antenna units according to the channel impact response generated by the channel detection reference signal;
and the channel measurement information which is reported by the terminal in the cell to which the third group of antenna units belong and contains the signal information transmitted by the third group of antenna units is measured in a second time interval.
8. The method of claim 4 or 7, wherein the channel measurement information reported by the terminal includes at least one of the following information:
the signal-to-interference ratio of a receiving channel on the first frequency band or the second frequency band in a second time interval of the terminal;
the terminal reports the channel quality information according to the measurement in the second time interval;
and the terminal reports the rank of the channel impact response matrix or the indication information of the rank according to the measurement in the second time interval.
9. The method of claim 1, wherein,
the second time interval is a time interval composed of downlink time slots included in a radio frame on a second frequency band or a third group of antenna units, and/or a time interval composed of sub-intervals of the downlink time slots included in the radio frame.
10. The method of claim 9, wherein the width and/or the starting position of the second time zone is determined according to one or a combination of two of the following ways:
determining a width and/or a starting position of the second time interval according to a duplex configuration on a first frequency band and/or a second frequency band;
determining the width and/or the starting position of the second time interval according to the preset starting position and the time width;
determining the width and/or the starting position of the second time interval according to the time width and the position of the idle time slot on the first frequency band;
determining the width and/or the starting position of the second time interval according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the first frequency band or the total service data transmission rate of the terminals, and/or according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the second frequency band or the total service data transmission rate of the terminals; and
and determining the width and/or the starting position of the second time interval according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the cell to which the first group of antenna units belong or the total service data transmission rate of the terminals, and/or according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the cell to which the third group of antenna units belong or the total service data transmission rate of the terminals.
11. The method of claim 10, wherein determining the width and/or the starting position of the second time interval according to the duplex configuration on the first frequency band and/or the second frequency band comprises one of:
under the condition that a first frequency band is a frequency band used in a time division duplex mode, and a second frequency band is a downlink frequency band used in a frequency division duplex mode, determining the starting position of a second time interval on the second frequency band in one or more time subintervals formed by uplink time slots on the first frequency band, wherein the width of the second time interval is smaller than or equal to the time subintervals;
under the condition that a time interval in which an uplink time slot and a downlink time slot simultaneously appear exists between an uplink time slot of a time division duplex radio frame on the first frequency band and a downlink time slot of the time division duplex radio frame on the second frequency band, the starting position of the second time interval on the second frequency band is determined to be in the time interval in which the uplink time slot and the downlink time slot simultaneously appear, and the width of the second time interval is smaller than or equal to the time interval in which the uplink time slot and the downlink time slot simultaneously appear.
12. The method of claim 10, wherein the step of determining the width and/or the starting position of the second time interval according to a predetermined starting position and time width comprises:
assigning a group of downlink time slots as the second time interval on a radio frame on a second frequency band, and configuring downlink channels of terminals needing to use the first group of transmission channels on time-frequency resources formed by the second time interval and the second frequency band according to the difference of the number of the transmission channels needing to be used among a group of terminals served by the second frequency band; or,
and allocating downlink channels of the terminals needing to use the first group of transmission channels on the second time interval contained in the wireless frame sent by the third group of antenna units according to the difference of the number of the transmission channels needing to be used among a group of terminals served by the cell to which the third group of antenna units belong.
13. The method of claim 10, wherein the step of determining the width and/or the start position of the second time interval according to the time width and the position of the free slot on the first frequency band comprises:
the second time interval is configured on the time interval composed of idle time slots on the first frequency band, and the idle time slots are in idle states at least in part on the first frequency band due to small downlink service load on the first frequency band; or that there are time slots in the first frequency band that are idle due to the absence of downlink traffic activity on the first frequency band.
14. The method of claim 10, wherein the step of determining the width and/or the starting position of the second time interval according to the number of terminals needing to use the first group of transmission channels in the group of terminals served by the first frequency band or the total traffic data transmission rate of such terminals, and/or according to the number of terminals needing to use the first group of transmission channels in the group of terminals served by the second frequency band or the total traffic data transmission rate of such terminals comprises at least one of the following two methods:
selecting a first type of terminal needing to use a first group of transmission channels on a first frequency band from terminals served by the first frequency band; determining the width of the first time interval according to the number of terminals needing to use a first group of transmission channels on a first frequency band or the total service data transmission rate of the terminals, and determining the starting position of the second time interval outside the first time interval; and
selecting terminals needing to use the first group of transmission channels on the second frequency band from the terminals served by the second frequency band; the width of the second time interval is determined according to the number of terminals needing to use the first group of transmission channels on the second frequency band or the total service data transmission rate of the terminals.
15. The method of claim 14, wherein determining the location of the second time interval outside of the first time interval comprises:
configuring downlink channels of terminals on a first frequency band, which need to use a first group of transmitting channels, and terminals which do not need to use the first group of transmitting channels on different time slots;
configuring downlink channels of terminals on a second frequency band which need to use the first group of transmitting channels and terminals which do not need to use the first group of transmitting channels on different time slots;
the time slot configurations of the terminals needing to use the first group of transmission channels on the first frequency band and the second frequency band are orthogonal in time;
taking a time interval formed by time slots occupied by terminals needing to use a first group of transmitting channels on a first frequency band as the first time interval;
taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels on a second frequency band as the second time interval;
configuring a start time of the second time interval outside the first time interval.
16. The method of claim 10, wherein the step of determining the width and/or the starting position of the second time interval according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the cell to which the first group of antenna elements belongs or the total traffic data transmission rate of such terminals, and/or according to the number of terminals needing to use the first group of transmission channels in a group of terminals served by the cell to which the third group of antenna elements belongs or the total traffic data transmission rate of such terminals comprises at least one of the following two methods:
selecting a terminal needing to use a first group of transmitting channels on a first group of antenna units from a group of terminals served by a cell to which the first group of antenna units belong; determining the width of the first time interval according to the number of terminals needing to use a first group of transmitting channels on a first group of antenna units or the total service data transmission rate of the terminals, and determining the starting position of the second time interval outside the first time interval; and
selecting a terminal which needs to use the first group of transmitting channels on the third group of antenna units from a group of terminals which are served by a cell to which the third group of antenna units belong; and determining the width of the second time interval according to the number of terminals using the first group of transmission channels on the third group of antenna units or the total service data transmission rate of the terminals.
17. The method of claim 16, wherein determining a starting location of the second time interval outside the first time interval comprises:
configuring downlink channels of terminals which need to use the first group of transmission channels and terminals which do not need to use the first group of transmission channels in a group of terminals which are served by a cell to which the first group of antenna units belong on different time slots;
configuring downlink channels of terminals which need to use the first group of transmitting channels and terminals which do not need to use the first group of transmitting channels in a group of terminals which are served by a cell to which a third group of antenna units belongs on different time slots;
time slot configurations of a terminal needing to use the first group of transmission channels in a group of terminals served by a cell to which the first group of antenna units belong are orthogonal in time with time slot configurations of a terminal needing to use the first group of transmission channels in a group of terminals served by a cell to which the third group of antenna units belong;
taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels in a group of terminals which are served by a cell to which the first group of antenna units belongs as the first time interval;
taking a time interval formed by time slots occupied by terminals needing to use the first group of transmitting channels in a group of terminals which are served by a cell to which a third group of antenna units belongs as the second time interval;
configuring a start time of the second time interval outside the first time interval.
18. The method of claim 1, wherein transmitting signals using the first set of transmit channels on a second frequency band comprises:
the first set of transmit channels and the second set of transmit channels simultaneously transmit signals to a second geographic area in a coordinated manner using a second channel bandwidth on a second frequency band;
wherein the first set of transmission channels uses the first set of antenna elements, the second set of transmission channels uses the second set of antenna elements, the bandwidth of the second channel is less than or equal to the width of a second frequency band, the second frequency band does not intersect with the first frequency band in the frequency domain, and the second geographic area is the same as or overlaps with the first geographic area.
19. The method of claim 18, wherein,
the first time interval is a time interval formed by uplink time slots of a time division duplex system, the first frequency band is a frequency band used in a time division duplex mode, the second frequency band is a downlink frequency band used in a frequency division duplex mode or a frequency band used in a downlink one-way mode, the second group of transmitting channels are transmitting channels operating according to the technical specification of the frequency division duplex system or transmitting channels operating according to the technical specification of wireless broadcasting on the second frequency band, the transmitting bandwidths and/or center frequencies of the first group of transmitting channels are configured on the first frequency band and the second frequency band in a time division mode, and the second time interval of the first group of transmitting channels for transmitting signals on the second group of frequency bands is located in the time interval formed by the uplink time slots on the first frequency band.
20. The method of claim 18, wherein,
the first time interval is a time interval formed by uplink time slots of a time division duplex system, the first frequency band and the second frequency band are frequency bands used in a time division duplex mode, in the second time interval, the time slot appearing on the first frequency band is an uplink time slot or an idle time slot, the time slot appearing on the second frequency band is a downlink time slot, and the transmission bandwidth and/or the center frequency of the first group of transmission channels are configured on the first frequency band and the second frequency band in a time division mode.
21. The method of claim 18, wherein,
the first time interval is a time interval formed by downlink time slots of a frequency division duplex system, and the first frequency band and the second frequency band are downlink frequency bands used in a frequency division duplex mode; or, the first time interval is a time interval composed of downlink time slots of the time division duplex system, and the first frequency band and the second frequency band are both frequency bands used in a time division duplex mode;
in a second time interval, the time slot on the first frequency band is an idle time slot or a downlink time slot without using the first group of transmission channels, and the downlink time slot appearing on the second frequency band is a time slot configured to the following terminals:
a terminal which needs a network side to use a first group of transmitting channels to increase the number of antennas for transmitting signals to the terminal; or, a terminal that needs the network side to use the first group of transmission channels to increase the network side transmission power;
configuring a transmission bandwidth and/or a center frequency of the first set of transmission channels on a first frequency band and a second frequency band in a time division manner.
22. The method of claim 21, wherein configuring the transmission bandwidths and/or center frequencies of the first set of transmission channels on the first and second frequency bands in a time-division manner comprises:
configuring the first set of transmit channels with a same wireless specification over a first frequency band and a second frequency band;
alternatively, the first set of transmit channels are configured with different wireless technology specifications over the first frequency band and the second frequency band.
23. The method of claim 1, wherein transmitting signals using the first set of transmit channels on the third set of antenna elements comprises:
the first set of transmission channels uses a third set of antenna units, the fourth set of transmission channels uses a fourth set of antenna units, the first set of transmission channels and the fourth set of transmission channels use the same carrier frequency on a first frequency band or a second frequency band to simultaneously transmit signals to a second geographic area in a coordinated manner, and the second geographic area is a different geographic area or an overlapped geographic area with the first geographic area.
24. The method of claim 23, wherein,
the first set of transmit channels uses a third set of antenna elements, the fourth set of transmit channels uses a fourth set of antenna elements, the third set of antenna elements is one of:
an antenna for use in a frequency division duplex system;
an antenna used in a time division duplex system;
an antenna used in both time division duplex and frequency division duplex systems.
25. The method of claim 23, wherein,
the first time interval is a time interval composed of downlink time slots of a time division duplex system, the first frequency band is a frequency band used in a time division duplex mode, the second time interval is a time interval composed of downlink time slots of a system to which the third group of antenna units belong, the third group of antenna units transmit signals on the second frequency band, and the second frequency band is a downlink frequency band used in a frequency division duplex mode.
26. The method of claim 25, wherein,
the fourth group of transmitting channels are transmitting channels which work according to the technical specification of the frequency division duplex system on the second frequency band, and the network side configures the transmitting bandwidth and the center frequency of the first group of transmitting channels on the first frequency band used by the first group of antenna units and the second frequency band used by the fourth group of antenna units in a time division manner;
a second time interval of the first group of transmitting channels for transmitting signals on the second frequency band is positioned in a time interval formed by uplink time slots on the first frequency band;
the second geographical area covered by the signal transmitted by the third group of antenna units used by the first group of transmission channels is different from or overlaps with the first geographical area covered by the signal transmitted by the first group of antenna units.
27. The method of claim 23, wherein,
the first set of transmit channels uses a third set of antenna elements and the fourth set of transmit channels uses a fourth set of antenna elements;
the first group of antenna units, the third group of antenna units and the fourth group of antenna units are antenna units used by a frequency division duplex system or antenna units used by a time division duplex system; the first group of antenna units and the third group of antenna units are antenna units covering different cells on the same site.
28. The method of claim 27, wherein,
the first time interval is a time interval formed by downlink time slots of a frequency division duplex system or a time interval formed by downlink time slots of a time division duplex system;
the first group of transmitting channels transmits on the third antenna unit by using the first frequency band, or transmits on the third antenna unit by using the second frequency band, and in the second time interval, the time slot of the first group of transmitting channels transmitting signals on the third group of antenna units is the idle time slot of the system to which the first antenna unit belongs or the time slot of the system to which the first antenna unit belongs not using the first group of transmitting channels, and the downlink time slot appearing on the third group of antenna units in the second time interval is the time slot configured to the following terminals:
the time slot used by the terminal needing to use the first group of transmitting channels to increase the number of antennas for transmitting signals to the terminal;
or, the time slot used by the terminal that needs to use the first group of transmission channels to increase the transmission power that can be output by the network side;
wherein the first set of transmit channels are switched between the first and third sets of antenna elements in a time-division manner.
29. The method of claim 18 or 23, wherein the step of simultaneously transmitting signals to the second geographical area in a coordinated manner comprises:
transmitting signals between antennas in a transmit diversity manner to the second geographic area;
transmitting signals between antennas to the second geographical area in a multiple-input multiple-output mode; or
Transmitting signals between antennas in a beamforming manner to the second geographic area.
30. A system for multiplexing transmit channels, wherein:
the first system structure mode, time division multiplexing transmitting channel between different frequency bands on the same group of antenna units, the system includes:
the system comprises a first group of antenna units including at least one antenna unit, a first group of transmitting channels including at least one transmitting channel with adjustable frequency point and/or transmitting bandwidth, a terminal scheduling unit and a transmitting channel scheduling unit, wherein:
the terminal scheduling unit is used for allocating downlink channel resources to the terminal needing to use the first group of transmitting channels on the second frequency band and/or the first frequency band, configuring the downlink channels of the terminal needing to receive the signals transmitted by the first group of transmitting channels from the first group of antenna units on the first frequency band in a first time interval, and/or configuring the downlink channels of the terminal needing to receive the signals transmitted by the first group of transmitting channels from the first group of antenna units on the second frequency band in a second time interval;
the transmission channel scheduling unit is configured to configure a first group of transmission channels in a time division multiplexing manner between a first frequency band and a second frequency band, the first group of transmission channels are in a state of being configured on the first frequency band in a first time interval, and the first group of transmission channels are in a state of being configured on the second frequency band in a second time interval;
the first group of transmission channels is configured to adjust a center frequency of the transmission channels and/or a bandwidth of the transmission channels according to the control of the transmission channel scheduling unit to form a second parameter configuration state, and use the first group of antenna units to transmit signals to the terminal configured on the second time interval on the second frequency band in the second parameter configuration state;
or, the system is constructed in a second way, the transmitting channel is time division multiplexed among different antenna units, and the system comprises:
the system comprises a first group of antenna units including at least one antenna unit, a third group of antenna units including at least one antenna unit, a first group of transmitting channels including transmitting channels with adjustable at least one frequency point and/or transmitting bandwidth, a terminal scheduling unit and a transmitting channel scheduling unit, wherein:
the terminal scheduling unit is configured to assign, in the first frequency band and/or the second frequency band, downlink channels of terminals that need to use the third group of antenna units in the second time interval, and/or assign, in the first frequency band, downlink channels of terminals that need to use the first group of antenna units in terminals served by the first frequency band in the first time interval;
the transmission channel scheduling unit is configured to configure a first group of transmission channels in a time division multiplexing manner between the first group of antenna units and the third group of antenna units, where the first group of transmission channels are in a state of being configured on the first group of antenna units in a first time interval, and the first group of transmission channels are in a state of being configured on the third group of antenna units in a second time interval;
the first group of transmission channels is configured to adjust a center frequency of the transmission channels and/or a bandwidth of the transmission channels according to the control of the transmission channel scheduling unit to form a third parameter configuration state, and use the third group of antenna units to transmit signals to the terminal configured on the second time interval by using the downlink channel on the first frequency band in the third parameter configuration state; or forming a fourth parameter configuration state, and transmitting signals to the terminal configured with the downlink channel on the second time interval by using the third group of antenna units on the second frequency band in the fourth parameter configuration state.
31. The system of claim 30, wherein,
in a first configuration of the system, the system further includes:
a terminal classification unit, configured to identify a terminal that needs to use the first group of transmission channels from terminals served in the second frequency band and/or from terminals served in the first frequency band;
in the second configuration of the system, the system further includes:
and the terminal classifying unit is used for identifying the terminal needing to use the first group of transmitting channels from the terminal served by the service cell to which the third group of antenna units belong and/or the terminal served by the service cell to which the first group of antenna units belong.
32. The system of claim 31, wherein,
the terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels from terminals served in the second frequency band by using at least one of the following methods:
identifying a terminal requiring use of the first set of transmit channels using a channel impulse response generated by a channel sounding reference signal transmitted on a second frequency band by a terminal serving the second frequency band;
and channel measurement information reported by the terminal using the second frequency band service, wherein the measurement information reported by the terminal needing to use the first group of transmission channels is obtained by measuring in the second time interval or in the first time interval.
33. The system of claim 31, wherein,
the terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels from terminals served in the first frequency band by using at least one of the following methods:
identifying a terminal requiring use of the first set of transmit channels using a channel impulse response generated by a channel sounding reference signal transmitted on the first frequency band by a terminal serving the first frequency band;
the channel measurement information reported by the terminal using the first frequency band service is obtained by measuring the measurement information reported by the terminal needing to use the first group of transmission channels in a first time interval.
34. The system of claim 32, wherein,
the terminal classifying unit in the first system configuration is configured to determine the terminal as a terminal that needs to use the first group of transmission channels on the second frequency band when the channel impulse response indicates that the terminal can receive multi-stream transmission on the second frequency band and the required number of transmission streams can be achieved only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission.
35. The system of claim 32, wherein,
the terminal classifying unit in the first system configuration mode is configured to identify a terminal that needs to use the first group of transmission channels by using channel measurement information reported by a terminal served in the second frequency band, in the following manner:
when the channel measurement information reported by the terminal indicates that the terminal can receive multi-stream transmission on the second frequency band and the number of required transmission streams can be reached only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission, the terminal is determined as the terminal needing to use the first group of transmission channels on the second frequency band; or,
when the channel measurement information reported by the terminal indicates that the transmission power or the transmission rate required by the terminal can be achieved only by configuring the first group of transmission channels on the second frequency band and using the first group of antenna units for transmission, the terminal is judged as the terminal needing to use the first group of transmission channels on the second frequency band.
36. The system of claim 31, wherein,
the terminal classifying unit in the second system configuration mode is configured to send, by the terminal, a channel sounding reference signal to the third group of antenna units in the first frequency band or the second frequency band, and identify, according to a channel impulse response generated by the channel sounding reference signal, a terminal that needs to use the first group of transmission channels on the third group of antenna units; and/or using the channel measurement information which is reported by the terminal in the cell to which the third group of antenna units belong and does not contain the signal information transmitted by the third group of antenna units in the first time interval.
37. The system of claim 32 or 36, wherein the channel measurement information reported by the terminal includes at least one of the following information:
a signal-to-interference ratio of a receiving channel on a first frequency band or a second frequency band in a first time interval by a terminal;
the terminal reports the channel quality information according to the measurement in the second time interval or the first time interval;
and the terminal reports the rank of the channel impact response matrix or the indication information of the rank according to the measurement in the second time interval.
38. The system of claim 37, wherein,
the terminal classifying unit in the second system configuration is configured to identify a terminal that needs to use the first group of transmission channels on the third group of antennas by using at least one of the following methods:
when the signal-to-interference ratio or channel quality information of a receiving channel, which is reported by a terminal and measured in a first time interval, cannot meet the data transmission rate requested by the terminal, identifying the terminal as the terminal needing to use a first group of transmitting channels on a third group of antennas;
and when the rank of the channel impulse response matrix measured in the second time interval or the indication information of the rank reported by the terminal indicates that the rank of the channel impulse response matrix can be reached only by using the first group of transmitting channels or the number of parallel transmission streams represented by the indication information of the rank, identifying the terminal as the terminal needing to use the first group of transmitting channels on the third group of antennas.
39. The system of claim 30, wherein,
in the first configuration, the first group of transmission channels is configured to transmit signals to the terminal whose downlink channel is configured in the second time interval in the following manner:
independently transmitting using the first set of antenna elements on a second frequency band;
in the second configuration, the first group of transmission channels is configured to transmit signals to the terminal whose downlink channel is configured in the second time interval in the following manner:
and independently transmitting using a third set of antenna elements on the first frequency band or the second frequency band.
40. The system of claim 39, wherein,
in the first configuration, the system further includes a second group of antenna units including at least one antenna unit, where the second group of antenna units and the first group of antenna units belong to the same antenna array or are disposed at the same site; the first group of transmission channels are used for transmitting signals to the terminal with the downlink channel configuration on the second time interval in the following way:
transmitting in a second frequency band using the first set of antenna elements in cooperation with the second set of antenna elements;
in the second configuration, the system further includes a fourth group of antenna units including at least one antenna unit, where the fourth group of antenna units and the third group of antenna units are deployed on the same site and cover the same service cell, and the first group of transmission channels are configured to transmit signals to a terminal whose downlink channel is configured in the second time interval in the following manner:
and transmitting on the first frequency band or the second frequency band using the third set of antenna elements in cooperation with the fourth set of antenna elements.
41. The system of claim 39 or 40,
in the first configuration, the system further includes a fifth group of antenna units including at least one antenna unit, where the fifth group of antenna units and the first group of antenna units are disposed at adjacent sites; the first group of transmission channels are used for transmitting signals at the terminal with the downlink channel configuration on the second time interval in the following way:
transmitting in a second frequency band using the first set of antenna elements and the fifth set of antenna elements;
in the second configuration, the system further includes a sixth group of antenna units including at least one antenna unit, where the sixth group of antenna units and the third group of antenna units are disposed at adjacent sites; the first group of transmission channels are used for transmitting signals to the terminal with the downlink channel configuration on the second time interval in the following way:
and transmitting in cooperation with the fifth set of antenna elements on the first frequency band or the second frequency band using the third set of antenna elements.
42. The system of claim 31, wherein,
in the first configuration, the terminal scheduling unit is configured to select, according to the classification result of the terminal classification unit, a terminal that needs to use a first group of transmission channels from terminals served by a second frequency band and/or a first frequency band;
in the second configuration, the terminal scheduling unit is configured to select, according to the classification result of the terminal classification unit, a terminal that needs to use the first group of transmission channels from terminals served by a cell to which the third group of antenna units belongs and/or terminals served by the first frequency band.
43. The system of claim 42, wherein,
in the first configuration, the terminal scheduling unit is configured to configure a downlink channel in a second time interval for a terminal that needs to use the first group of transmission channels in the second frequency band, and/or configure a downlink channel in a first time interval for a terminal that needs to use the first group of transmission channels in the first frequency band;
in the second configuration, the terminal scheduling unit is configured to configure a downlink channel in a second time interval for a terminal that needs to use the first group of transmission channels in the first frequency band or the second frequency band through the third group of antenna units, and/or configure a downlink channel for a terminal that needs to use the first group of transmission channels in the first frequency band through the first group of antenna units.
44. The system of claim 30, wherein,
in the first configuration, the transmission channel scheduling unit is configured to determine the second time interval by:
configuring the second time interval on a predetermined time slot on a radio frame on a second frequency band;
determining the second time interval on the time interval occupied by the uplink time slot of the time division duplex system on the first frequency band;
determining the second time interval within an idle time interval on a first frequency band; or,
determining the second time interval outside of an activation time interval of the first set of transmit channels on a first frequency band;
wherein the predetermined time slot is a time slot designated on a second frequency band for transmitting data to a terminal using a first set of transmit channels, and the predetermined time slot is orthogonal in time to dwell time intervals of the first set of transmit channels on a first frequency band;
in the second configuration, the transmission channel scheduling unit is configured to determine the second time interval by using at least one of the following manners:
configuring the second time interval on a preset time slot on a wireless frame sent by a system to which a third antenna unit belongs;
determining the second time interval on the time interval occupied by the uplink time slot of the time division duplex system configured on the first frequency band;
determining the second time interval within an idle time interval on a first frequency band; or,
determining the second time interval outside of an activation time interval of the first set of transmit channels on a first frequency band;
the predetermined time slot is a time slot designated on the third set of antenna elements for transmitting signals to the terminal using the first set of transmit channels, and the predetermined time slot is orthogonal in time to the dwell time interval of the first set of transmit channels on the first frequency band.
45. The system of claim 30, wherein,
in the first or second configuration, the first group of transmission channels includes:
a radio frequency circuit unit including a radio frequency power amplifier;
a radio frequency circuit unit including a radio frequency power amplifier, a D/A conversion circuit unit;
the device comprises a radio frequency circuit unit comprising a radio frequency power amplifier, a D/A conversion circuit unit and a circuit unit for performing baseband processing on data to be transmitted; or
The radio frequency circuit unit comprises a radio frequency power amplifier, an intermediate frequency circuit unit corresponding to the radio frequency power amplifier, a D/A conversion circuit unit and a circuit unit for performing baseband processing on data to be transmitted.
46. The system of claim 30, wherein,
in the first configuration, the same local oscillator is used when the first group of transmission channels resides on the second frequency band for two adjacent times and uses the first group of antenna units to transmit signals;
in the second configuration, the same local oscillator is used for the first group of transmission channels when the third group of antenna units are used for transmitting signals twice.
47. The system of claim 30, wherein,
in the first configuration, different antenna elements are used for transmitting signals to the terminal on the first frequency band and for receiving signals from the terminal on the first frequency band, and the first group of antenna elements are antenna elements for transmitting signals to the terminal;
in the second configuration, the service cell to which the third group of antenna elements belongs transmits signals to the terminal serving the third group of antenna elements, and the third group of antenna elements transmits signals to the terminal using the first frequency band or the second frequency band in the cell to which the third group of antenna elements belongs, the antenna elements being different from the antenna elements used for receiving signals from the terminal.
48. The system of claim 47, wherein,
in the first configuration, the first group of transmission channels uses the first transmission filter when transmitting signals to the terminal using the first group of antenna elements in the first frequency band, and uses the first reception filter for the antenna elements for receiving signals in the first frequency band;
in the second configuration, the first group of transmission channels uses the second transmission filter when transmitting signals to the terminal using the third group of antenna units, and the service cell to which the third group of antenna units belongs uses the second reception filter when receiving signals from the terminal in service.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110220794.9A CN102917460B (en) | 2011-08-03 | 2011-08-03 | A kind of method and system for the transmission channel that is time-multiplexed |
| PCT/CN2012/077614 WO2013016990A1 (en) | 2011-08-03 | 2012-06-27 | Method and system for time-division multiplexing emission channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110220794.9A CN102917460B (en) | 2011-08-03 | 2011-08-03 | A kind of method and system for the transmission channel that is time-multiplexed |
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| CN102917460B (en) | 2018-01-05 |
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