CN109889315A - A kind of method, apparatus, base station and the terminal of data transmission - Google Patents

A kind of method, apparatus, base station and the terminal of data transmission Download PDF

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Publication number
CN109889315A
CN109889315A CN201711279437.3A CN201711279437A CN109889315A CN 109889315 A CN109889315 A CN 109889315A CN 201711279437 A CN201711279437 A CN 201711279437A CN 109889315 A CN109889315 A CN 109889315A
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China
Prior art keywords
frequency resource
bandwidth
data
frequency
terminal
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CN201711279437.3A
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CN109889315B (en
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陈宪明
戴博
方惠英
刘锟
杨维维
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ZTE Corp
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ZTE Corp
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Priority to CN201711279437.3A priority Critical patent/CN109889315B/en
Priority to PCT/CN2018/119433 priority patent/WO2019109963A1/en
Publication of CN109889315A publication Critical patent/CN109889315A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A kind of method, apparatus, base station and the terminal of data transmission, transmit cell special reference signal using only the frequency resource of the first bandwidth, which comprises establish and communicate to connect using only the frequency resource and terminal of first bandwidth；Data are sent to the terminal according to first mode or second mode.In embodiments of the present invention, cell special reference signal is only transmitted within the scope of the frequency resource of the first bandwidth, after terminal access, terminal is branched to the frequency resource transmitting data other than the first bandwidth by base station, in this way, the range of settable lesser first bandwidth, so that the influence that cell special reference signal transmits other communication system datas when alleviating two or more coexistence of communication systems, improves frequency resource utilization rate.

Description

Data transmission method, device, base station and terminal
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, a base station, and a terminal for data transmission.
Background
With the continuous development and Evolution of communication technologies, in order to meet different requirements, a variety of different types of communication systems have appeared, for example, to meet the requirement of high-speed mobile communication, a third Generation mobile communication system named as W-CDMA (Wideband Code Division Multiple Access)/CDMA 2000(Code Division Multiple Access 2000)/TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), a fourth Generation mobile communication system named as LTE (Long Term Evolution )/max (world Interoperability for Microwave Access), and a fifth Generation mobile communication system named as NR (New Radio frequency) organized under 3GPP (3 Generation Partnership Project, third Generation Partnership Project) have been proposed; to meet the demand of the internet of things, a Communication system named as MTC (Machine Type Communication) internet of things is also proposed.
In the development and evolution of various systems, coexistence of two or more communication systems may occur. When two or more communication systems coexist and may interfere with each other, for example, when a first system and a second system coexist, the first system requires Cell-specific reference Signals (CRS) to be transmitted within a system bandwidth of the first system regardless of whether there is data transmission, and the second system cannot transmit data of the second system using frequency resources within the system bandwidth of the first system due to interference of the CRS, which may eventually cause waste of frequency resources.
Disclosure of Invention
The embodiment of the invention provides a data transmission method, a data transmission device, a base station and a terminal, which are used for reducing the influence of CRS (cell-specific reference signal) on data transmission when a communication system coexists.
The embodiment of the invention provides a data transmission method, which only uses frequency resources of a first bandwidth to send a cell-specific reference signal, and comprises the following steps:
establishing a communication connection with a terminal using only the frequency resources of the first bandwidth;
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
The embodiment of the invention also provides a data transmission method, which only uses the frequency resource of the first bandwidth to receive the cell-specific reference signal, and comprises the following steps:
establishing a communication connection with a base station using only frequency resources of the first bandwidth;
receiving data sent by the base station according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
The embodiment of the invention also provides a data transmission device, which comprises:
a first communication establishment module to: establishing a communication connection with the terminal using only the frequency resources of the first bandwidth;
a first sending module configured to:
transmitting a cell-specific reference signal using only frequency resources of the first bandwidth; and
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
An embodiment of the present invention further provides a base station, including:
a processor;
a memory for storing the processor-executable instructions;
communication means for performing information transceiving communication according to control of the processor;
wherein the processor is configured to perform the following operations:
transmitting a cell-specific reference signal using only frequency resources of a first bandwidth;
establishing a communication connection with a terminal using only the frequency resources of the first bandwidth;
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
The embodiment of the invention also provides a data transmission device, which comprises:
a second communication establishment module to: establishing a communication connection with a base station using only frequency resources of a first bandwidth;
a second receiving module to:
receiving a cell-specific reference signal using only frequency resources of a first bandwidth; and
receiving data sent by the base station according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
An embodiment of the present invention further provides a terminal, including:
a processor;
a memory for storing the processor-executable instructions;
communication means for performing information transceiving communication according to control of the processor;
wherein the processor is configured to perform the following operations:
receiving a cell-specific reference signal using only frequency resources of a first bandwidth;
establishing a communication connection with a base station using only frequency resources of the first bandwidth;
receiving data sent by the base station according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
The embodiment of the invention also provides a computer-readable storage medium, which stores computer-executable instructions, wherein the computer-executable instructions are used for executing the data transmission method. In the embodiment of the invention, the CRS is transmitted only in the frequency resource range of the first bandwidth, and the base station shunts the terminal to the frequency resources except the first bandwidth to transmit data after the terminal is accessed, so that the range of the first bandwidth can be set to be smaller, thereby reducing the influence of the cell-specific reference signal on the data transmission of other communication systems when two or more communication systems coexist and improving the utilization rate of the frequency resources.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flowchart of a method for data transmission (applied to a base station) according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for data transmission (applied to a terminal) according to an embodiment of the present invention;
fig. 3 is a schematic diagram of frequency resources of a first system and a second system of application example 1 of the present invention;
fig. 4 is a schematic diagram of frequency resources of a first system and a second system of application example 2 of the present invention;
FIG. 5 is a schematic diagram of an apparatus for data transmission according to an embodiment of the present invention (applied to a base station);
fig. 6 is a schematic diagram of an apparatus for data transmission according to an embodiment of the present invention (applied to a terminal).
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
When two or more communication systems coexist, the communication systems may interfere with each other due to the presence of the CRS, and the frequency resource utilization rate is not high. For example, in order to efficiently utilize previously deployed MTC related communication infrastructure and improve the efficiency of spectrum resource utilization, in the future MTC systems may coexist with NR systems deployed within the system bandwidth of the NR systems. In the current MTC system, CRS is always present in the MTC system bandwidth, and when MTC and NR systems coexist, even if there is no MTC downlink data transmission currently, the frequency resources in the MTC system bandwidth cannot be used for NR data transmission. Similarly, when the LTE system coexists with the NR system, the CRS of the LTE system may also affect the data transmission of the NR system; when the MTC system coexists with the WiMax system, the CRS of the MTC system may also affect data transmission of the WiMax system.
In the embodiment of the present invention, it is proposed that the communication system transmitting the CRS may transmit the CRS only on a part of frequency resources (i.e., frequency resources of the first bandwidth), and no CRS is transmitted on other parts of frequency resources (i.e., frequency resources other than the first bandwidth), so as to reduce the influence of the CRS on data transmission of other communication systems when the communication system transmitting the CRS coexists with the other communication systems.
As shown in fig. 1, a method for data transmission according to an embodiment of the present invention is applied to a base station, where the base station transmits a CRS only using frequency resources of a first bandwidth, and the method includes:
and 101, establishing a communication connection with the terminal by using the frequency resources of the first bandwidth only.
In the frequency resource range of the first bandwidth, a communication connection with the terminal is established by transmitting one or more of a synchronization signal, a CRS, a master information block message, a system information block message, a random access response message (also referred to as Msg2), a contention resolution message (also referred to as Msg4), and a RRC (radio resource Control) connection establishment message.
The synchronization signal is used for realizing downlink synchronization of the terminal and the base station, the messages of the main information block and the system information block carry system configuration parameters, the random access response message is used for realizing uplink synchronization of the terminal and the base station, the competition resolving message is used for resolving conflicts among different terminals in the random access process, and the RRC connection establishing message carries necessary terminal special configuration parameters.
The CRS is used for one or more of a terminal demodulation master information block message, a system information block message, a random access response message, a contention resolution message and an RRC connection establishment message.
In the embodiment of the present invention, the establishment of the communication connection with the terminal using the frequency resources of the first bandwidth is directed to a downlink operation (i.e., an operation of transmitting signals and messages) in the process of establishing the communication connection with the terminal; the process of establishing a communication connection with the terminal further includes an uplink operation (i.e., an operation of receiving signals and messages); wherein, the uplink operation generally includes receiving a Preamble signal (also referred to as Msg1) and a random access message (also referred to as Msg3) sent by the terminal; the preamble signal is used for realizing uplink synchronization between the terminal and the base station, and the random access message carries parameters reported by the terminal.
Step 102, sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and the frequency resource range outside the first bandwidth.
In the embodiment of the invention, the CRS is transmitted only in the frequency resource range of the first bandwidth, and the base station shunts the terminal to the frequency resources except the first bandwidth to transmit data after the terminal is accessed, so that the range of the first bandwidth can be set to be smaller, thereby reducing the influence of the cell-specific reference signal on the data transmission of other communication systems when two or more communication systems coexist and improving the utilization rate of the frequency resources. In this embodiment of the present invention, in the first mode, the base station may be: and taking the X frequency resource units out of the first bandwidth as a first frequency resource unit set, and transmitting data to the terminal within the frequency resource range of the first frequency resource unit set.
In the second mode, the base station may be: and taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and transmitting data to the terminal in the frequency resource range of the second frequency resource unit set.
Wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
By adopting one of the two modes to send data to the terminal, the terminal can be shunted to frequency resources outside the first bandwidth to transmit data.
In an embodiment, before sending data to the terminal according to the first mode or the second mode, the method further includes:
receiving information which is sent by the terminal and indicates that the terminal has the capability of receiving data in a frequency resource range outside a first bandwidth;
and sending triggering information to the terminal, wherein the triggering information is used for triggering the terminal to receive the data according to the first mode or the second mode.
And the base station sends the data according to the first mode or the second mode when knowing that the terminal has the capability of receiving the data in the frequency resource range outside the first bandwidth, and triggers the terminal to receive the data by adopting the first mode or the second mode through the trigger information. The base station may transmit data to the terminal only in the frequency resource range of the first bandwidth if the terminal does not have the capability of receiving data in the frequency resource range outside the first bandwidth.
Wherein the information indicating that the terminal has the capability of receiving data in a frequency resource range outside the first bandwidth and the trigger information may be transmitted to the terminal through a master information block message, a system information block message, or a terminal-specific RRC message.
In an embodiment, the method further comprises:
sending range information of the first set of frequency resource units or range information of the second set of frequency resource units to the terminal, the range information including at least one of the following information:
the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth. Wherein the range information may be transmitted to the terminal through a master information block message, a system information block message, or a terminal-specific RRC message.
By sending the frequency range information of the first bandwidth to the terminal, the terminal can acquire the value of Y and the location information of the Y frequency resource units of the first bandwidth.
In one embodiment, the location information of the X frequency resource units is represented by one of the following ways:
frequency range information for a second bandwidth;
frequency range information and a frequency resource unit index of the second bandwidth;
frequency range information of the second bandwidth and an index of a first resource block occupied by each frequency resource unit in the X frequency resource units;
and the physical frequency point information corresponding to each frequency resource unit in the X frequency resource units.
In order to indicate the location information of the X frequency resource units, a concept of a second bandwidth is proposed, and the second bandwidth may overlap with the first bandwidth or may not overlap with the first bandwidth.
When the position information of the X frequency resource units is only represented by the frequency range information of the second bandwidth, if the second bandwidth is not overlapped with the first bandwidth, the frequency range of the second bandwidth is the frequency range of the X frequency resource units, and the frequency resources of the second bandwidth are divided into the X frequency resource units, so as to obtain the position information of the X resource units; if the second bandwidth overlaps with the first bandwidth, dividing the frequency resources excluding the overlapping portion with the first bandwidth in the second bandwidth into X frequency resource units, and obtaining location information of the X resource units.
When the position information of the X frequency resource units is represented by frequency range information and frequency resource unit indexes of a second bandwidth, if the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resources of the second bandwidth into N frequency resource units; if the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapped part of the first bandwidth in the second bandwidth into N frequency resource units; wherein N is an integer greater than or equal to X; and obtaining the frequency resource unit indexes corresponding to X frequency resource units in the N frequency resource units according to the frequency resource unit indexes, and obtaining the position information of the X resource units.
When the position information of the X frequency resource units is represented by the frequency range information of the second bandwidth and the index of the first resource block occupied by each frequency resource unit in the X frequency resource units, if the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resources of the second bandwidth into a plurality of resource blocks; if the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapping part of the second bandwidth and the first bandwidth into a plurality of resource blocks; and obtaining the position information of the X resource units according to the index of the first resource block occupied by each frequency resource unit in the X frequency resource units.
In one embodiment, the frequency range information of the second bandwidth includes at least one of:
frequency position information of the second bandwidth, and bandwidth width information of the second bandwidth.
For example, if the frequency position of the preset second bandwidth is the same as the frequency position of the first bandwidth, the terminal may know the frequency range of the second bandwidth only by sending the bandwidth width information of the second bandwidth to the terminal.
The frequency location information may include, but is not limited to, a center frequency, among others.
In one embodiment, information of frequency resource units participating in frequency hopping is sent to the terminal, and the information of the frequency resource units participating in frequency hopping includes at least one of the following: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
Wherein the information of the frequency resource units participating in frequency hopping can be sent to the terminal through a master information block message, a system information block message, or a terminal-specific RRC message.
Whether the terminal performs the frequency hopping operation may be configured by setting an enable frequency hopping operation or a non-enable frequency hopping operation. Since the interval between adjacent frequency resource units participating in frequency hopping is at least 1, frequency hopping is not possible when X is equal to 1.
In one embodiment, the data includes downlink control channel data and downlink shared channel data, and before the data is transmitted to the terminal, the method further includes:
sending first configuration information to the terminal, wherein the first configuration information is used for configuring a frequency resource unit for carrying the data of the downlink control channel;
wherein, the frequency resource unit carrying the downlink shared channel data is indicated by the downlink control channel data; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
Wherein the first configuration information may be transmitted to the terminal through a master information block message, a system information block message, or a terminal-specific RRC message.
Because the downlink control channel data is used for indicating the position of the downlink shared channel data, the required data volume is small, and one frequency resource unit is usually used for carrying; the data volume of the downlink shared channel data is determined according to the data volume actually required to be transmitted and the size of the receiving bandwidth supportable by the terminal, so that one frequency resource unit may be used for carrying, and a plurality of frequency resource units may be used for carrying.
In one embodiment, the downlink control channel data includes unicast downlink control channel data and paging downlink control channel data;
when the downlink control channel data is unicast downlink control channel data, the first configuration information is information of a frequency resource unit bearing the downlink control channel data;
when the downlink control channel data is paging downlink control channel data, the first configuration information is information of a subset of frequency resource units that can carry the downlink control channel data, or information of frequency resource units that carry the downlink control channel data.
When the downlink control channel data is paging downlink control channel data, the frequency resource unit carrying the downlink control channel data can be determined through the frequency resource unit subset capable of carrying the downlink control channel data and the terminal identifier.
In one embodiment, the downlink control channel data is paging downlink control channel data, and the downlink shared channel data is paging downlink shared channel data, when transmitting data to the terminal within the frequency resource range of the second frequency resource unit set:
the frequency resource unit bearing the paging downlink control channel data is one of Y frequency resource units contained in the first bandwidth, and the frequency resource unit bearing the paging downlink shared channel data is one of the Y frequency resource units contained in the first bandwidth; or,
the frequency resource unit bearing the paging downlink control channel data is one frequency resource unit in the first frequency resource unit set, and the frequency resource unit bearing the paging downlink shared channel data is one frequency resource unit in the second frequency resource unit set.
That is, when the paging downlink control channel data is transmitted using the frequency resource of the first bandwidth, the paging downlink shared channel data is transmitted using the frequency resource of the first bandwidth accordingly.
In one embodiment, data is transmitted to the terminal in a DMRS (Demodulation Reference Signal) -based transmission mode. The demodulation reference signal is used for demodulating the received data by the terminal, and the demodulation reference signal is sent to the terminal along with the data.
In one embodiment, the sending data to the terminal includes:
and transmitting the data to the terminal on all OFDM (Orthogonal Frequency Division Multiplexing) symbols in the subframe.
In the embodiment, all OFDM symbol resources in the subframe can be used for data transmission, and OFDM symbol resources do not need to be reserved for other systems, thereby further improving resource utilization efficiency and data transmission performance. For example, in the existing MTC system, one or more OFDM symbols in front of a subframe need to be reserved for use as a downlink control region of the LTE system, and thus cannot be used for MTC data transmission; by adopting the embodiment, when the MTC and the non-LTE system (such as an NR system) coexist, OFDM symbol resources do not need to be reserved for a downlink control region of the LTE system in a subframe, and all the OFDM symbol resources in the subframe can be used for MTC data transmission in the MTC system.
In one embodiment, before transmitting data to the terminal, the method further includes:
and sending second configuration information to the terminal, wherein the second configuration information is used for indicating that the data is transmitted on all OFDM symbols in the subframe. Wherein the second configuration information may be transmitted to the terminal through a master information block or a system information block message.
In one embodiment, the base station of the second system transmits at least one of a synchronization signal and a common control message of the second system to the terminal of the second system within the invalid downlink subframe range of the first system.
By the embodiment, when the MTC and NR systems coexist (the first system is the MTC system, and the second system is the NR system), interference between the physical downlink channel data transmission of the MTC system and the transmission of the synchronization signal and the common control message of the NR system can be effectively avoided.
As shown in fig. 2, a method for data transmission according to an embodiment of the present invention is applied to a terminal, where the terminal receives a cell-specific reference signal only using frequency resources of a first bandwidth, and the method includes:
and step 201, establishing a communication connection with the base station by using only the frequency resources of the first bandwidth.
In the frequency resource range of the first bandwidth, a communication connection with the base station is established by receiving one or more of a synchronization signal, a CRS, a master information block message, a system information block message, a random access response message (also referred to as Msg2), a contention resolution message (also referred to as Msg4), and a RRC (radio resource Control) connection establishment message.
The synchronization signal is used for realizing downlink synchronization of the terminal and the base station, the messages of the main information block and the system information block carry system configuration parameters, the random access response message is used for realizing uplink synchronization of the terminal and the base station, the competition resolving message is used for resolving conflicts among different terminals in the random access process, and the RRC connection establishing message carries necessary terminal special configuration parameters.
The CRS is used for one or more of a terminal demodulation master information block message, a system information block message, a random access response message, a contention resolution message and an RRC connection establishment message.
In the embodiment of the present invention, the establishing of the communication connection with the base station using the frequency resource of the first bandwidth is for a downlink operation (i.e., an operation of receiving signals and messages) in the process of establishing the communication connection with the base station; the process of establishing a communication connection with the base station further includes an uplink operation (i.e., an operation of transmitting signals and messages); wherein, the uplink operation generally includes sending a Preamble (Preamble) signal (also referred to as Msg1) and a random access message (also referred to as Msg 3); the preamble signal is used to implement uplink synchronization between the terminal and the base station, and the random access message carries parameters reported to the base station by the terminal.
Step 202, receiving data sent by the base station according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
In the embodiment of the invention, the CRS is transmitted only in the frequency resource range of the first bandwidth, and the terminal can transmit data on the frequency resources except the first bandwidth after the terminal is accessed, so that the range of the first bandwidth can be smaller, thereby reducing the influence of the cell-specific reference signal on the data transmission of other communication systems when two or more communication systems coexist and improving the utilization rate of the frequency resources.
In the implementation of the present invention, the terminal in the first mode may be: taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and receiving data sent by the base station in a frequency resource range of the first frequency resource unit set;
the terminal in the second mode may be: taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and receiving data transmitted by the base station in a frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
In one of these two modes, the terminal may transmit data on frequency resources outside the first bandwidth.
In an embodiment, before receiving the data transmitted by the base station according to the first mode or the second mode, the method further includes:
transmitting information indicating that a terminal has a capability of receiving data in a frequency resource range outside the first bandwidth to the base station;
and receiving trigger information sent by the base station, wherein the trigger information is used for triggering the terminal to receive the data according to a first mode or a second mode.
The base station can acquire that the terminal has the data receiving capability in the frequency resource range outside the first bandwidth by sending information indicating that the terminal has the data receiving capability in the frequency resource range outside the first bandwidth to the base station, and then receive the trigger information to enable the terminal to receive data in the first mode or the second mode.
Wherein the terminal may receive the information indicating that the terminal has a capability of receiving data in a frequency resource range outside the first bandwidth and the trigger information through a master information block message, a system information block message, or a terminal-specific RRC message.
In an embodiment, the method further comprises:
receiving range information of the first set of frequency resource units or range information of a second set of frequency resource units sent by the base station, wherein the range information includes at least one of the following information:
the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth. Besides the X value configured by the message receiving base station, X may also be preset as a fixed value, for example, X is preset to be 1.
By receiving the frequency range information of the first bandwidth, the terminal can acquire the value of Y and the location information of the Y frequency resource units of the first bandwidth.
In order to indicate the location information of the X frequency resource units, a concept of a second bandwidth is proposed, and the second bandwidth may overlap with the first bandwidth or may not overlap with the first bandwidth.
The location information of the X frequency resource units may be represented by one of the following ways:
frequency range information for a second bandwidth;
frequency range information and a frequency resource unit index of the second bandwidth;
frequency range information of the second bandwidth and an index of a first resource block occupied by each frequency resource unit in the X frequency resource units;
and the physical frequency point information corresponding to each frequency resource unit in the X frequency resource units.
When the location information of the X resource units is represented by the frequency range information of the second bandwidth, the terminal receives the frequency range information of the second bandwidth, and may obtain the location information of the X resource units in the following manner:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resources of the second bandwidth into X frequency resource units to obtain the position information of the X resource units;
when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapping part of the second bandwidth and the first bandwidth into X frequency resource units to obtain the position information of the X frequency resource units.
When the position information of the X frequency resource units is represented by the frequency range information and the frequency resource unit index of the second bandwidth, the terminal receives the frequency range information and the frequency resource unit index of the second bandwidth, and may obtain the position information of the X resource units in the following manner:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resources of the second bandwidth into N frequency resource units; when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapped part of the second bandwidth and the first bandwidth into N frequency resource units; wherein N is an integer greater than or equal to X;
and obtaining frequency resource unit indexes corresponding to X frequency resource units in the N frequency resource units according to the frequency resource unit indexes, and obtaining the position information of the X resource units.
When the position information of the X frequency resource units is represented by the frequency range information of the second bandwidth and the index of the first resource block occupied by each frequency resource unit in the X frequency resource units, the terminal receives the frequency range information of the second bandwidth and the index of the first resource block occupied by each frequency resource unit in the X frequency resource units, and can obtain the position information of the X resource units in the following manner:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resource of the second bandwidth into a plurality of resource blocks; or when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapping part of the second bandwidth and the first bandwidth into a plurality of resource blocks;
and obtaining the position information of the X resource units according to the index of the first resource block occupied by each frequency resource unit in the X frequency resource units.
In one embodiment, the frequency range information of the second bandwidth includes at least one of:
frequency position information of the second bandwidth, and bandwidth width information of the second bandwidth.
For example, if the frequency position of the preset second bandwidth is the same as the frequency position of the first bandwidth, the terminal only needs to receive the bandwidth width information of the second bandwidth, and the terminal can acquire the frequency range of the second bandwidth.
The frequency location information may include, but is not limited to, a center frequency, among others.
In an embodiment, the method further comprises:
adopting preset or receiving information of frequency resource units participating in frequency hopping; wherein the information of the frequency resource units participating in frequency hopping includes at least one of: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
Wherein the terminal may receive the information of the frequency resource units participating in frequency hopping through a master information block message, a system information block message, or a terminal-specific RRC message.
The terminal may decide whether to perform a frequency hopping operation according to the setting of the base station. Since the interval between adjacent frequency resource units participating in frequency hopping is at least 1, frequency hopping is not possible when X is equal to 1.
In one embodiment, the data includes downlink control channel data and downlink shared channel data, and before receiving the data transmitted by the base station, the method further includes:
receiving first configuration information sent by the base station, wherein the first configuration information is used for acquiring a frequency resource unit for bearing data of the downlink control channel;
acquiring a frequency resource unit carrying the data of the downlink shared channel through the data of the downlink control channel; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
Wherein the terminal may receive the first configuration information through a master information block message, a system information block message, or a terminal-specific RRC message.
Because the downlink control channel data is used for indicating the position of the downlink shared channel data, the required data volume is small, and one frequency resource unit is usually used for carrying; the data volume of the downlink shared channel data is determined according to the data volume actually required to be transmitted and the size of the receiving bandwidth supportable by the terminal, so that one frequency resource unit may be used for carrying, and a plurality of frequency resource units may be used for carrying.
In one embodiment, the downlink control channel data includes unicast downlink control channel data and paging downlink control channel data;
when the downlink control channel data is unicast downlink control channel data, the first configuration information is information of a frequency resource unit bearing the downlink control channel data; or
When the downlink control channel data is paging downlink control channel data, the first configuration information is information of a subset of frequency resource units that can carry the downlink control channel data, or information of frequency resource units that carry the downlink control channel data.
When the downlink control channel data is paging downlink control channel data, the frequency resource unit carrying the downlink control channel data can be determined through the frequency resource unit subset capable of carrying the downlink control channel data and the terminal identifier.
In one embodiment, the downlink control channel data is paging downlink control channel data, and the downlink shared channel data is paging downlink shared channel data, and when receiving data transmitted by the base station within the frequency resource range of the second frequency resource unit set:
the frequency resource unit bearing the paging downlink control channel data is one of Y frequency resource units contained in the first bandwidth, and the frequency resource unit bearing the paging downlink shared channel data is one of the Y frequency resource units contained in the first bandwidth; or,
the frequency resource unit bearing the paging downlink control channel data is one of the X frequency resource units outside the first bandwidth, and the frequency resource unit bearing the paging downlink shared channel data is one of the second frequency resource unit set.
That is, when the paging downlink control channel data is received using the frequency resource of the first bandwidth, the paging downlink shared channel data is received using the frequency resource of the first bandwidth accordingly.
In an embodiment, the receiving data transmitted by the base station includes:
and receiving the data transmitted by the base station by adopting a DMRS-based transmission mode. The DMRS is used for the terminal to demodulate the received data, and the terminal receives the DMRS when receiving the data.
In one embodiment, the method further comprises:
and measuring the channel state information by using the received DMRS in a frequency resource range outside the first bandwidth. And after the terminal measures the channel state information of the received DMRS, feeding the measurement result back to the base station so that the base station can know the channel state.
In addition, the terminal may not measure the channel state information.
In an embodiment, the receiving data transmitted by the base station includes:
receiving the data transmitted by the base station on all OFDM symbols within a subframe.
In the embodiment, all OFDM symbol resources in the subframe can be used for data transmission, and OFDM symbol resources do not need to be reserved for other systems, thereby further improving resource utilization efficiency and data transmission performance. For example, in the existing MTC system, one or more OFDM symbols in front of a subframe need to be reserved for use as a downlink control region of the LTE system, and thus cannot be used for MTC data transmission; by adopting the embodiment, when the MTC and the non-LTE system (such as an NR system) coexist, OFDM symbol resources do not need to be reserved for a downlink control region of the LTE system in a subframe, and all the OFDM symbol resources in the subframe can be used for MTC data transmission in the MTC system.
In an embodiment, before receiving the data transmitted by the base station, the method further includes:
receiving second configuration information; and acquiring that the data is transmitted on all OFDM symbols in the subframe according to the second configuration information. Wherein the terminal may receive the second configuration information through a master information block message or a system information block message.
In an embodiment, the method further comprises: and the terminal of the second system receives at least one of the synchronization signal and the public control message of the second system in the invalid downlink subframe range of the first system.
By the embodiment, when the MTC and NR systems coexist (the first system is the MTC system, and the second system is the NR system), interference between the physical downlink channel data transmission of the MTC system and the transmission of the synchronization signal and the common control message of the NR system can be effectively avoided.
In the following, some application examples are described, and the application examples may be combined with each other without conflict.
Application example 1
In the present application example, as shown in fig. 3, the first system is deployed within the system bandwidth of the second system. The base station of the first system has established a communication connection with the terminal. A base station of a first system transmits data to a terminal in Y frequency resource units included in a first bandwidth (without using frequency resources other than the first bandwidth), or transmits data to the terminal in X frequency resource units other than the first bandwidth (using frequency resources other than the first bandwidth); the terminal receives data in a range of Y frequency resource units contained in the first bandwidth, or receives data in a range of X frequency resource units (namely a first frequency resource unit set) outside the first bandwidth; wherein X and Y are integers greater than 0. That is, the Y frequency resource units included in the first bandwidth and the X frequency resource units outside the first bandwidth operate independently of each other. Wherein, the data includes downlink control channel data (for carrying downlink control information) and downlink shared channel data; within X frequency resource unit ranges outside the first bandwidth, no CRS is transmitted, and only DMRS is transmitted together with data; the downlink shared channel data transmitted within the X frequency resource elements outside the first bandwidth uses a DMRS-based transmission pattern. The base station indicates the frequency range of the first bandwidth to the terminal through the master information block message; correspondingly, the terminal acquires the frequency range of the first bandwidth through the master information block message.
In the application example, before receiving data, the terminal reports the capability that the terminal has the capability of receiving data in a frequency resource range outside the first bandwidth to the base station through the terminal-specific RRC message; then, acquiring trigger information of receiving data in a frequency resource range outside the first bandwidth, which is sent by a base station, through a terminal-specific RRC message; after acquiring the trigger information, the terminal receives data in the range of X frequency resource units outside the first bandwidth. Correspondingly, before sending data to the terminal, the base station acquires the capability of receiving data in the frequency resource range beyond the first bandwidth of the terminal through the terminal-specific RRC message; triggering the terminal to receive data in a frequency resource range outside the first bandwidth through the terminal-specific RRC message; after sending the trigger message, the base station sends data to the terminal in the range of X frequency resource units outside the first bandwidth.
In the present application example, as an option, before sending data to the terminal, the base station may configure an X value to the terminal through a system information block or a terminal-specific RRC message; before receiving data, the terminal can obtain the value X through a system information block or a terminal-specific RRC message.
In this application example, before the base station transmits data, the terminal is caused to acquire the location information of the X frequency resource units outside the first bandwidth by one of:
the first method is as follows: location information of the X frequency resource units,
the frequency range information of the second bandwidth indicates:
the base station configures a frequency range corresponding to a second bandwidth for the terminal, and if the second bandwidth is not overlapped with the first bandwidth, directly divides X frequency resource units from the second bandwidth; if the second bandwidth overlaps the first bandwidth, the remaining bandwidth except the overlapping portion of the first bandwidth is directly divided into X frequency resource units from the second bandwidth.
If the second bandwidth is not overlapped with the first bandwidth, the terminal can implicitly obtain an X value through the size of the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, the terminal can implicitly obtain the value X by removing the size of the residual bandwidth which is overlapped with the first bandwidth from the second bandwidth.
For example, assume that one frequency resource unit includes 6 consecutive resource blocks; the first bandwidth comprises 15 consecutive resource blocks and the second bandwidth comprises 39 consecutive resource blocks, and the first bandwidth is located at the center of the second bandwidth (i.e., the 15 consecutive resource blocks located at the center of the second bandwidth overlap with the first bandwidth); in this case, the remaining bandwidth excluding the portion overlapping with the first bandwidth from the second bandwidth includes 24 resource blocks in total (may be 12 resource blocks before and after the first bandwidth). The base station divides 4 frequency resources without any overlapping from the 24 resource blocks; accordingly, the terminal implicitly obtains the value of X as 4 (equal to the size of the remaining bandwidth divided by the size of the frequency resource) by removing the size of the remaining bandwidth (equal to 24 resource blocks) after the overlapping portion with the first bandwidth from the second bandwidth, and divides 4 frequency resources without any overlapping from the 24 resource blocks.
For another example, assume that one frequency resource unit includes 6 consecutive resource blocks; the second bandwidth includes 24 consecutive resource blocks and the second bandwidth does not overlap the first bandwidth. The base station divides 4 frequency resources without any overlap from the second bandwidth (i.e. the above 24 consecutive resource blocks); the terminal implicitly obtains the value of X as 4 (equal to the size of the second bandwidth divided by the size of the frequency resource) by the size of the second bandwidth (equal to 24 resource blocks) and divides 4 frequency resource units from the 24 resource blocks.
The second method comprises the following steps: the position information of the X frequency resource units is represented by frequency range information of a second bandwidth and a frequency resource unit index:
the base station configures a frequency range corresponding to the second bandwidth for the terminal; if the second bandwidth is not overlapped with the first bandwidth, dividing N frequency resource units (with indexes from 0 to N-1 in sequence) from the second bandwidth, wherein N is an integer not less than X; if the second bandwidth is overlapped with the first bandwidth, dividing the residual bandwidth after removing the overlapped part of the second bandwidth and the first bandwidth into N frequency resource units; and configuring the frequency resource unit indexes of the X frequency resource units in the N frequency resource units for the terminal through a system information block or a terminal-specific RRC message.
Correspondingly, the terminal acquires a frequency range corresponding to the second bandwidth, and if the second bandwidth is not overlapped with the first bandwidth, N frequency resource units (the indexes of the frequency resource units are 0 to N-1 in sequence) are divided from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing the rest bandwidth except the overlapped part of the first bandwidth from the second bandwidth into N frequency resource units (the indexes are 0 to N-1 in sequence); the terminal acquires the frequency resource unit indexes of the X frequency resource units in the N frequency resource units through the system information block message or the terminal-specific RRC message.
For example, assuming that X is equal to 4, one frequency resource unit includes 6 consecutive resource blocks; the first bandwidth comprises 15 consecutive resource blocks and the second bandwidth comprises 63 consecutive resource blocks, and the first bandwidth is located in the center of the second bandwidth (i.e. the 15 consecutive resource blocks located in the center of the second bandwidth overlap the first bandwidth). In this case, the remaining bandwidth excluding the portion overlapping with the first bandwidth from the second bandwidth includes 48 resource blocks (there may be 24 resource blocks before and after the first bandwidth); if there is no overlap between different frequency resources, a total of 8 frequency resource units (with indices of 0 to 7 in order) can be divided from the above 48 resource blocks. The base station configures indexes of 4 frequency resource units for the terminal through a message (a system information block or a terminal-specific RRC message); alternatively, 8 bits in the message are used for configuration in a Bitmap form (for example, a value of "00111100" indicates that the index of 4 frequency resource units is 2 to 5); the terminal acquires indexes of 4 frequency resource units through the message.
For another example, assuming that X is equal to 4, one frequency resource unit includes 6 consecutive resource blocks; the second bandwidth includes 48 consecutive resource blocks and the second bandwidth does not overlap the first bandwidth. In this case, 8 frequency resource units (resource indexes are 0 to 7 in order) are divided from the second bandwidth (i.e., the above-mentioned 48 consecutive resource blocks). The base station configures indexes of 4 frequency resource units to the terminal through a message (a system information block or a terminal-specific RRC message); alternatively, 8 bits in the message are configured in a Bitmap (e.g., the value "00111100" indicates that the index of 4 frequency resource units is 2 to 5); the terminal acquires indexes of 4 frequency resource units through the message.
The third method comprises the following steps: the position information of the X frequency resource units is represented by the frequency range information of the second bandwidth and the index of the first resource block occupied by each frequency resource unit in the X frequency resource units:
the base station configures a frequency range corresponding to a second bandwidth, and if the second bandwidth is not overlapped with the first bandwidth, a plurality of resource blocks are divided from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing a plurality of resource blocks from the residual bandwidth except for the overlapped part of the first bandwidth in the second bandwidth; the base station configures the index of the first resource block occupied by each frequency resource unit in the X frequency resource units to the terminal through a system information block or a terminal-specific RRC message.
Correspondingly, the terminal acquires a frequency range corresponding to the second bandwidth, and if the second bandwidth is not overlapped with the first bandwidth, a plurality of resource blocks are divided from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing a plurality of resource blocks from the residual bandwidth part except the overlapped part of the first bandwidth in the second bandwidth; the terminal acquires the index of the first resource block occupied by each frequency resource unit in the X frequency resource units through a system information block or a terminal-specific RRC message.
For example, assuming that X is equal to 4, one frequency resource unit includes 6 consecutive resource blocks; the first bandwidth comprises 15 consecutive resource blocks and the second bandwidth comprises 63 consecutive resource blocks, and the first bandwidth is located in the center of the second bandwidth, i.e. the 15 consecutive resource blocks located in the center of the second bandwidth overlap the first bandwidth. In this case, the remaining bandwidth excluding the portion overlapping with the first bandwidth from the second bandwidth includes 48 resource blocks (there may be 24 resource blocks before and after the first bandwidth), and the index of each resource block is 0 to 47 (equivalent to dividing 48 resource blocks); the base station configures, to the terminal through a message (a system information block or a terminal-specific RRC message), that an index of a first resource block occupied by a 1 st frequency resource unit of the 4 frequency resource units is 0, an index of a first resource block occupied by a 2 nd frequency resource unit is 9, an index of a first resource block occupied by a 3rd frequency resource unit is 24, and an index of a first resource block occupied by a 4 th resource unit is 33; and the terminal acquires the index of the first resource block occupied by each frequency resource unit in the 4 frequency resource units through the message.
For another example, assuming that X is equal to 4, one frequency resource unit includes 6 consecutive resource blocks; the second bandwidth includes 48 consecutive resource blocks and the second bandwidth does not overlap the first bandwidth. In this case, the indexes of the resource blocks in the second bandwidth are 0 to 47, respectively (equivalent to dividing 48 resource blocks); the base station configures, to the terminal through a message (a system information block or a terminal-specific RRC message), that an index of a first resource block occupied by a 1 st frequency resource unit of the 4 frequency resource units is 0, an index of a first resource block occupied by a 2 nd frequency resource unit is 9, an index of a first resource block occupied by a 3rd frequency resource unit is 24, and an index of a first resource block occupied by a 4 th frequency resource unit is 33; and the terminal acquires the index of the first resource block occupied by each frequency resource unit through the message.
The method is as follows: the position information of the X frequency resource units is represented by the physical frequency point information corresponding to each frequency resource unit in the X frequency resource units:
and the base station configures a physical frequency point corresponding to each frequency resource unit in the X frequency resource units for the terminal through a system information block or a terminal-specific RRC message. Correspondingly, the terminal acquires the physical frequency point corresponding to each frequency resource unit through a system information block or a terminal-specific RRC message.
In this application example, the base station configures the frequency range of the second bandwidth to include: and the base station configures the frequency range corresponding to the second bandwidth through a system information block or a terminal-specific RRC message. For example, the base station configures the frequency location and the bandwidth size of the second bandwidth through a system information block or a terminal-specific RRC message, so that the terminal acquires a frequency range corresponding to the second bandwidth; or, the frequency position of the preset second bandwidth is the same as the frequency position of the first bandwidth; in this case, the base station only needs to configure the size of the second bandwidth through the system information block or the dedicated RRC message, so that the terminal can acquire the frequency range corresponding to the second bandwidth.
Correspondingly, the acquiring, by the terminal, the frequency range corresponding to the second bandwidth includes: the terminal acquires a frequency range corresponding to the second bandwidth through a system information block or a terminal-specific RRC message; for example, the terminal acquires the frequency location and the bandwidth size of the second bandwidth through a system information block or a terminal-specific RRC message to acquire a frequency range corresponding to the second bandwidth; or, the frequency position of the preset second bandwidth is the same as the frequency position of the first bandwidth; in this case, the terminal may acquire the frequency range corresponding to the second bandwidth only by acquiring the size of the second bandwidth through the system information block or the dedicated RRC message.
It should be noted that the frequency location includes, but is not limited to, a center frequency.
In this application example, when X is greater than 1, the base station indicates to the terminal through the downlink control channel data which frequency resource unit receiving the downlink shared channel data is a specific one of the X frequency resource units; the terminal determines on which particular one of the X frequency resource units the downlink shared channel data is received from the downlink control channel data. When the bit overhead required to characterize one of the X frequency resource units is different from the bit overhead required to characterize one of the Y frequency resource units, the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: data is transmitted and received in a DMRS transmission mode over Y frequency resource elements included in the first bandwidth. The payload refers to the size of the downlink control information carried by the downlink control channel data.
Or, when X is greater than 1, the base station indicates to the terminal through the downlink control channel data which frequency resource unit receiving the downlink shared channel data is a specific number (including one or more) of the X frequency resource units; the terminal determines from the downlink control channel data which specific ones (including one or more) of the X frequency resource units to receive the downlink shared channel data on.
In the application example, when X is greater than 1 and the downlink control channel data is unicast downlink control channel data, the base station configures to the terminal, through the terminal-specific RRC message, which of the X frequency resource units is the specific frequency resource unit that receives the downlink control channel data; the terminal determines on which particular one of the X frequency resource units to receive the downlink control channel data via a terminal-specific RRC message.
In this application example, when X is greater than 1 and the downlink control channel data is paging downlink control channel data, the base station may configure a subset of frequency resource units available for receiving the downlink control channel data to the terminal through the system information block message and select one of the subset of frequency resource units to send the downlink control channel data to the terminal according to the terminal identifier (UE _ ID); correspondingly, the terminal acquires the frequency resource unit subsets through the system information block message and selects one of the frequency resource unit subsets to receive the data of the paging downlink control channel according to the terminal identification. Wherein any frequency resource unit in the subset of frequency resource units is one of the X frequency resource units;
or the base station configures the terminal with which specific frequency resource unit in the X frequency resource units to receive the data of the downlink control channel through the terminal-specific RRC message; the terminal determines on which particular one of the X frequency resource units to receive the downlink control channel data via a terminal-specific RRC message.
Wherein the unicast downlink control channel data carries downlink control information for scheduling unicast (equivalent to terminal-specific) downlink shared channel data, and the unicast downlink shared channel data carries unicast service (equivalent to terminal-specific service); similarly, Paging (Paging) downlink control channel data carries downlink control information for scheduling Paging downlink shared channel data, and Paging downlink shared channel data carries Paging messages.
In this application example, when X is greater than 1 and the frequency hopping operation is enabled, the base station configures, through a system information block or a terminal-specific RRC message, information on frequency resource units participating in frequency hopping to the terminal (including information on the number and location of the frequency resource units configured to participate in frequency hopping), and the terminal acquires, through the system information block or the terminal-specific RRC message, the frequency resource units participating in frequency hopping, for example, the base station configures and the terminal acquires that the frequency resource units participating in frequency hopping include 2 (corresponding to the number of frequency resource units participating in frequency hopping) and 1 frequency resource unit (corresponding to the location information of the frequency resource units participating in frequency hopping) is spaced between adjacent frequency resource units participating in frequency hopping; or, the base station and the terminal use information of preset frequency resource units participating in frequency hopping (including the number and location information of the preset frequency resource units participating in frequency hopping), for example, the preset frequency resource units participating in frequency hopping include 2 (corresponding to the number of the frequency resource units participating in frequency hopping) and 1 frequency resource unit (corresponding to the location information of the frequency resource units participating in frequency hopping) is spaced between adjacent frequency resource units participating in frequency hopping. The base station configures a frequency resource unit for the terminal through a terminal-specific RRC message or a frequency resource unit for the terminal to receive downlink control channel data (including unicast or paging downlink control channel data) determined according to a terminal identifier, and the frequency resource unit for the terminal to receive the downlink control channel data (including unicast or paging downlink control channel data) obtained through the terminal-specific RRC message or determined according to the terminal identifier is a 1 st frequency resource unit participating in downlink control channel data frequency hopping transmission; similarly, the frequency resource unit indicated to the terminal by the base station through the downlink control channel data and received by the terminal acquired by the terminal through the downlink control channel data is the 1 st frequency resource unit participating in the frequency hopping transmission of the downlink shared channel data.
In this application example, in the process that the base station and the terminal determine the information of the frequency resource units participating in frequency hopping (including configuring or acquiring the frequency resource units participating in frequency hopping through a message, or using a preset frequency resource unit participating in frequency hopping), it is supported to determine the frequency resource units participating in frequency hopping according to a loopback wrapaund manner. For example, assuming that X is equal to 8 (i.e., data is transmitted or received in 8 frequency resource units numbered sequentially from 0 to 7 outside the first bandwidth), the frequency resource units participating in frequency hopping include 4, 1 frequency resource unit is spaced between adjacent frequency resource units participating in frequency hopping, and the 1 st frequency resource unit participating in frequency hopping is the unit numbered 6; in this case, the 2 nd, 3rd and 4 th cells participating in frequency hopping are the number 0, 2 and 4 cells, respectively.
In the present application example, when X is equal to 1, the frequency hopping operation and the scheduling operation across frequency resources are not supported; the frequency resource unit of the terminal receiving the data of the downlink control channel and the frequency resource unit of the data of the downlink shared channel are the same frequency resource unit by default; in the payload of the data of the downlink control channel, no indication information of a frequency resource unit occupied by the data of the downlink shared channel exists; when bit overhead is required to represent one frequency resource unit (equivalent to Y being greater than 1) of the Y frequency resource units, the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: data is transmitted (including transmitted and received) in a DMRS transmission mode over Y frequency resource elements included in the first bandwidth.
In this application example, the terminal performs or does not perform measurement of the channel state information using the DRMS in the range of X frequency resource elements outside the first bandwidth.
In the present application example, transmission of the master information block message, the system information block message and/or the terminal-specific RRC message from the base station occurs within Y frequency resource elements contained in the first bandwidth. That is, the base station transmits a master information block message, a system information block message, and/or a terminal-specific RRC message from the base station to the terminal within a range of Y frequency resource units included in the first bandwidth; accordingly, the terminal receives a master information block message, a system information block message, and/or a terminal-specific RRC message from the base station within Y frequency resource units included in the first bandwidth.
In the present application example, the demodulation reference signal occurs only in the subframe where data is transmitted.
In the present application example, one frequency resource unit includes 6 consecutive resource blocks; in this case, the frequency resource unit may also be referred to as a narrowband.
Application example 2
In the present application example, as shown in fig. 4, the first system is deployed within the system bandwidth of the second system. The base station of the first system has established a communication connection with the terminal. A base station of a first system transmits data to a terminal in a range of Y frequency resource units included in a first bandwidth (without using frequency resources other than the first bandwidth), or transmits data to the terminal in 1 frequency resource unit other than the first bandwidth (using frequency resources other than the first bandwidth); correspondingly, the terminal receives data in the range of Y frequency resource units contained in the first bandwidth, or receives data in the range of 1 frequency resource unit outside the first bandwidth; y is an integer greater than 0. That is, the Y frequency resource units included in the first bandwidth and the 1 frequency resource units other than the first bandwidth operate independently of each other. In the present application example (unlike application example 1), the number of frequency resources available for transmitting data outside the first bandwidth is preset (fixed to 1) independent of the configuration of the base station. The data comprises data of downlink control channel and data of downlink shared channel; within 1 frequency resource unit range beyond the first bandwidth, no CRS is transmitted, and only DMRS is transmitted together with data; the DMRS transmission mode is used for downlink shared channel data transmitted in the range of X frequency resource elements outside the first bandwidth.
In the application example, before receiving data, the terminal reports the capability of receiving data in the frequency resource unit range beyond the first bandwidth to the base station through the terminal-specific RRC message, and acquires the trigger information of receiving data in the frequency resource unit range beyond the first bandwidth through the terminal-specific RRC message; and after acquiring the trigger information, the terminal receives data in the range of 1 frequency resource unit outside the first bandwidth. Before sending data to the terminal, the base station acquires the capability of receiving data in the frequency resource unit range outside the first bandwidth of the terminal through the terminal-specific RRC message, and triggers the terminal to receive the data in the 1 frequency resource unit range outside the first bandwidth through the terminal-specific RRC message; after transmitting the trigger message, the base station transmits data to the terminal within 1 frequency resource unit range outside the first bandwidth.
In the present application example, when the terminal receives data within 1 frequency resource unit other than the first bandwidth, since there are only 1 frequency resource unit available for data transmission, the frequency hopping operation and the scheduling operation across the frequency resource units are not supported and the frequency resource unit for receiving the downlink control channel data and the frequency resource unit for the downlink shared channel data are the same frequency resource unit by default. At this time, the payload of the downlink control channel data does not have the indication information of the frequency resource unit occupied by the downlink shared channel data; when bit overhead is required to represent one frequency resource unit of the Y frequency resource units (equivalent to the case that Y is greater than 1), the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: data is transmitted in a DMRS transmission mode within Y frequency resource elements contained in the first bandwidth.
In this application example, before the base station transmits data, the terminal is caused to acquire the location information of 1 frequency resource unit outside the first bandwidth by one of the following manners:
the first method is as follows: the location information of the 1 frequency resource unit is represented by the frequency range information of the second bandwidth and the frequency resource unit index:
the base station configures a frequency range corresponding to the second bandwidth for the terminal; if the second bandwidth is not overlapped with the first bandwidth, dividing N frequency resource units (the frequency resource unit indexes are 0 to N-1 in sequence) from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing the rest bandwidth part except the overlapped part of the first bandwidth from the second bandwidth into N frequency resource units (the indexes are 0 to N-1 in sequence), wherein N is an integer not less than X; and the base station configures the frequency resource unit indexes of the 1 frequency resource unit in the N frequency resource units for the terminal through a system information block or a terminal-specific RRC message.
Correspondingly, before the terminal receives the data, the terminal acquires a frequency range corresponding to the second bandwidth; if the second bandwidth is not overlapped with the first bandwidth, dividing N frequency resource units (the indexes are 0 to N-1 in sequence) from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing the rest bandwidth part except the overlapped part of the first bandwidth from the second bandwidth into N frequency resource units (the indexes are 0 to N-1 in sequence), wherein N is an integer not less than X; the terminal acquires the indexes of the 1 frequency resource unit in the N frequency resource units through a system information block or a terminal-specific RRC message.
The second method comprises the following steps: the position information of the 1 frequency resource unit is represented by frequency range information of a second bandwidth and an index of a first resource block occupied by the 1 frequency resource unit:
the base station configures a frequency range corresponding to the second bandwidth for the terminal; if the second bandwidth is not overlapped with the first bandwidth, dividing a plurality of resource blocks from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing a plurality of resource blocks from the residual bandwidth except for the overlapped part of the second bandwidth and the first bandwidth; the base station configures the terminal with the index of the first resource block occupied by the 1 frequency resource unit through a message (a system information block message or a terminal-specific RRC message).
Correspondingly, the terminal acquires a frequency range corresponding to the second bandwidth; if the second bandwidth is not overlapped with the first bandwidth, dividing a plurality of resource blocks from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing a plurality of resource blocks from the residual bandwidth part except the overlapped part of the first bandwidth in the second bandwidth; the terminal acquires the index of the first resource block occupied by the 1 frequency resource unit through a system information block or a terminal-specific RRC message.
The third method comprises the following steps: the base station configures the physical frequency points corresponding to the 1 frequency resource unit for the terminal through a system information block or a terminal-specific RRC message; correspondingly, the terminal acquires the physical frequency points corresponding to the 1 frequency resource unit through a system information block or a terminal-specific RRC message.
In this application example, the acquiring, by the terminal, the frequency range corresponding to the second bandwidth includes: and acquiring a frequency range corresponding to the second bandwidth through a system information block or a terminal-specific RRC message.
The configuring, by the base station, a frequency range corresponding to the second bandwidth includes: the frequency range of the second bandwidth is configured by a system information block or a terminal-specific RRC message.
In this application example, the terminal performs or does not perform the measurement of the channel state information using the DRMS in the range of 1 frequency resource element outside the first bandwidth.
Application example 3
In the application example, the first system is deployed in the system bandwidth range of the second system, or the bandwidth of the first system and the bandwidth of the second system are mutually overlapped. The base station of the first system has established a communication connection with the terminal. A base station of a first system transmits data to a terminal within Y frequency resource units included in a first bandwidth (without using frequency resources other than the first bandwidth), or transmits data to the terminal within Y frequency resource units included in the first bandwidth and X frequency resource units other than the first bandwidth (i.e., a second set of frequency resource units, which are X + Y frequency resource units in total) (using frequency resources other than the first bandwidth); the terminal receives data in a range of Y frequency resource units included in the first bandwidth, or receives data in a range of Y frequency resource units included in the first bandwidth and X frequency resource units outside the first bandwidth (i.e., a second set of frequency resource units, which is X + Y frequency resource units in total); x and Y are integers greater than 0. When data is transmitted or received within Y frequency resource units included in the first bandwidth and X frequency resource units outside the first bandwidth (X + Y frequency resource units in total), it means that the Y frequency resource units included in the first bandwidth and the X frequency resource units outside the first bandwidth are operated jointly. The data comprises data of downlink control channel and data of downlink shared channel; within the range of X frequency resource units outside the first bandwidth, CRS is not transmitted, and only DMRS is transmitted together with data; the DMRS transmission mode is used for downlink shared channel data transmitted in the frequency resources included in the first bandwidth and in the X frequency resource elements other than the first bandwidth.
In the application example, before receiving data, the terminal reports to the base station through a terminal-specific RRC message that the terminal has the capability of receiving data in a frequency resource range outside the first bandwidth, and acquires trigger information for receiving data in Y frequency resource units of the first bandwidth and X frequency resource unit ranges (total X + Y frequency resource units) outside the first bandwidth through the terminal-specific RRC message; after acquiring the trigger information, the terminal receives data in the range of Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth. Correspondingly, before the base station sends data to the terminal, the base station acquires the capability of receiving data in the frequency resource range outside the first bandwidth of the terminal through the terminal-specific RRC message and triggers the terminal to receive the data in the Y frequency resource units contained in the first bandwidth and the X frequency resource units outside the first bandwidth through the terminal-specific RRC message; after transmitting the trigger message, the base station transmits data to the terminal within the range of Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth.
In the present application example, as an option, before sending data to the terminal, the base station may configure an X value to the terminal through a system information block or a terminal-specific RRC message; before receiving data, the terminal can obtain the value X through a system information block or a terminal-specific RRC message.
In this application example, before the base station transmits data, the terminal is caused to acquire the location information of the X frequency resource units outside the first bandwidth by one of:
the first method is as follows: location information of the X frequency resource units,
the frequency range information of the second bandwidth indicates:
the base station configures a frequency range corresponding to the second bandwidth; if the second bandwidth is not overlapped with the first bandwidth, directly dividing X frequency resource units from the second bandwidth; otherwise, if the second bandwidth overlaps the first bandwidth, the remaining bandwidth part excluding the overlapping part with the first bandwidth is directly divided into X frequency resource units from the second bandwidth.
If the second bandwidth is not overlapped with the first bandwidth, the terminal directly divides X frequency resource units from the second bandwidth; if the second bandwidth overlaps the first bandwidth, the remaining bandwidth of the terminal excluding the overlapping portion of the second bandwidth directly divides X frequency resource units from the second bandwidth.
Alternatively, if the second bandwidth is not overlapped with the first bandwidth, the terminal can implicitly obtain the value of X through the size of the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, the terminal can implicitly obtain the value X by removing the size of the residual bandwidth which is overlapped with the first bandwidth from the second bandwidth.
The second method comprises the following steps: the position information of the X frequency resource units is represented by frequency range information of a second bandwidth and a frequency resource unit index:
the base station configures a frequency range corresponding to the second bandwidth for the terminal; if the second bandwidth is not overlapped with the first bandwidth, dividing N frequency resource units (the indexes are 0 to N-1 in sequence) from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing the residual bandwidth after removing the overlapped part of the second bandwidth and the first bandwidth into N frequency resource units; and configuring the frequency resource unit indexes of the X frequency resource units in the N frequency resource units through a system information block or a terminal-specific RRC message.
Correspondingly, the terminal acquires a frequency range corresponding to the second bandwidth; if the second bandwidth is not overlapped with the first bandwidth, dividing N frequency resource units (the frequency resource unit indexes are 0 to N-1 in sequence) from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing the rest bandwidth after removing the overlapped part of the first bandwidth from the second bandwidth into N frequency resource units (indexes are 0 to N-1 in sequence), wherein N is an integer not less than X; the terminal acquires the frequency resource unit indexes of the X frequency resource units in the N frequency resource units through the system information block message or the terminal-specific RRC message.
The third method comprises the following steps: the position information of the X frequency resource units is represented by the frequency range information of the second bandwidth and the index of the first resource block occupied by each unit in the X frequency resource units:
the base station configures a frequency range corresponding to the second bandwidth for the terminal; if the second bandwidth is not overlapped with the first bandwidth, dividing a plurality of resource blocks from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing a plurality of resource blocks from the residual bandwidth part except the overlapped part of the first bandwidth in the second bandwidth; the base station configures the index of the first resource block occupied by each frequency resource unit in the X frequency resource units to the terminal through a system information block or a terminal-specific RRC message.
Correspondingly, the terminal acquires a frequency range corresponding to the second bandwidth; if the second bandwidth is not overlapped with the first bandwidth, dividing a plurality of resource blocks from the second bandwidth; if the second bandwidth is overlapped with the first bandwidth, dividing a plurality of resource blocks from the residual bandwidth part except the overlapped part of the first bandwidth in the second bandwidth; the terminal acquires the index of the first resource block occupied by each frequency resource unit in the X frequency resource units through a system information block or a terminal-specific RRC message.
The method is as follows: the position information of the X frequency resource units is represented by the physical frequency point information corresponding to each frequency resource unit in the X frequency resource units:
and the base station configures a physical frequency point corresponding to each frequency resource unit in the X frequency resource units for the terminal through a system information block or a terminal-specific RRC message. Correspondingly, the terminal acquires the physical frequency point corresponding to each frequency resource unit through a system information block or a terminal-specific RRC message.
In this application example, the acquiring, by the terminal, the frequency range corresponding to the second bandwidth includes: and acquiring a frequency range corresponding to the second bandwidth through a system information block or a terminal-specific RRC message.
The configuring, by the base station, a frequency range corresponding to the second bandwidth includes: the frequency range of the second bandwidth is configured by a system information block or a terminal-specific RRC message.
In this application example, when the downlink control channel data is unicast downlink control channel data, the base station configures, to the terminal through the terminal-specific RRC message, which specific frequency resource unit in the second set of frequency resource units the frequency resource unit receiving the downlink control channel data is; accordingly, the terminal determines, via the terminal-specific RRC message, which particular frequency resource unit of the second set of frequency resource units on which to receive the downlink control channel data.
The second set of frequency resource units includes Y frequency resource units included in the first bandwidth and X frequency resource units other than the first bandwidth (total X + Y frequency resource units).
In this application example, when the downlink control channel data is unicast downlink control channel data, and the downlink shared channel data is unicast downlink shared channel data:
the base station indicates the terminal which frequency resource unit receiving the downlink shared channel data is a specific one in the second frequency resource unit set through the downlink control channel data; correspondingly, the terminal determines which specific one of the second frequency resource unit set receives the downlink shared channel data through the downlink control channel data; when a bit overhead required for one frequency resource unit in the second set of frequency resource units representing X + Y frequency resource units is different from a bit overhead required for one frequency resource unit in the Y frequency resource units, the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: transmitting (including transmitting and receiving) data in a DMRS transmission mode over Y frequency resource elements contained in a first bandwidth;
or, the base station indicates to the terminal through the downlink control channel data, and the frequency resource units receiving the downlink shared channel data are specific ones (including one or more) of the second frequency resource unit set; the terminal determines which specific frequency resource units in the second frequency resource unit set receive the downlink shared channel data through the downlink control channel data; the second set of frequency resource units includes Y frequency resource units included in the first bandwidth and X frequency resource units (X + Y frequency resource units in total) outside the first bandwidth.
In the present application example, when the downlink control channel data is paging downlink control channel data:
the base station configures a frequency resource unit subset which can be used for receiving downlink control channel data to the terminal through a system information block message and selects one of the frequency resource unit subsets to send the downlink control channel data to the terminal according to a terminal identification (UE _ ID); in this case, the terminal acquires the subset of frequency resource units through the system information block message and selects one of the subset of frequency resource units to receive the downlink control channel data according to the terminal identifier. Any one of the subset of frequency resource units is one of a second set of frequency resource units;
or the base station configures the specific frequency resource unit in the second frequency resource unit set to receive the frequency resource of the downlink control channel data for the terminal through the terminal-specific RRC message; in this case, the terminal determines on which particular one of the second set of frequency resource units to receive the downlink control channel data through a terminal-specific RRC message. The second set of frequency resource units includes Y frequency resource units included in the first bandwidth and X frequency resource units located outside the first bandwidth.
In this application example, when the downlink control channel data is paging downlink control channel data, and the downlink shared channel data is paging downlink shared channel data:
when the base station transmits the downlink control channel data on one frequency resource unit in the Y frequency resource units contained in the first bandwidth, the base station transmits the downlink shared channel data on one frequency resource unit in the Y frequency resource units contained in the first bandwidth; the base station indicates the following data to the terminal through the data of the downlink control channel: the frequency resource unit receiving the downlink shared channel data is a specific one of Y frequency resource units included in the first bandwidth. When the terminal receives the downlink control channel data on one of the Y frequency resource units contained in the first bandwidth, the downlink shared channel data is received on one of the Y frequency resource units contained in the first bandwidth; the terminal acquires the frequency resource unit receiving the downlink shared channel data through the downlink control channel data, wherein the frequency resource unit is a specific one of Y frequency resource units contained in the first bandwidth. The payload of the downlink control channel data is the same as the payload of the downlink control channel data used in the following scenario: transmitting and receiving data in a DMRS transmission mode within Y frequency resource elements included in a first bandwidth;
when the base station sends the downlink control channel data on one frequency resource unit in the X frequency resource units outside the first bandwidth, sending the downlink shared channel data on one frequency resource unit in a second frequency resource unit set (X + Y frequency resource units in total); wherein the terminal is indicated by the downlink control channel data which frequency resource receiving the downlink shared channel data is a specific one of the second set of frequency resource units. When the terminal receives downlink control channel data on one frequency resource unit in the X frequency resource units outside the first bandwidth, receiving downlink shared channel data on one frequency resource unit in the second frequency resource unit set; wherein the frequency resource for receiving the downlink shared channel data is obtained through the downlink control channel data and is a specific one in the second frequency resource unit set. When the bit overhead required to characterize one of the X + Y frequency resource units is different from the bit overhead required to characterize one of the Y frequency resource units, the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: data is transmitted in a DMRS transmission mode over Y frequency resource elements included in the first bandwidth.
Since some terminals in the first system may not support reception of downlink shared channel data on frequency resources outside the first bandwidth, such terminals may be referred to as Legacy terminals, the benefits of using the above method include: when the base station of the first system (or the terminal of the present application example) transmits (or receives) paging downlink control channel data on one of the Y frequency resource units included in the first bandwidth, the terminal of the present application example and the Legacy terminal can share the same paging downlink control channel data and paging downlink shared channel data, thereby further improving resource utilization efficiency.
In this application example, when the frequency hopping operation is enabled, the base station configures information (including the number and location information of frequency resource units configured to participate in frequency hopping) of frequency resource units participating in frequency hopping to the terminal through a system information block or a terminal-specific RRC message, and the terminal acquires the frequency resource units participating in frequency hopping through the system information block or the terminal-specific RRC message, for example, the base station configures and the terminal acquires that the frequency resource units participating in frequency hopping include 4 (corresponding to the number of frequency resource units participating in frequency hopping) and 1 frequency resource unit (corresponding to the location information of the frequency resource units participating in frequency hopping) is spaced between adjacent frequency resource units participating in frequency hopping; alternatively, the base station and the terminal use preset frequency resource units participating in frequency hopping (including the preset number and location information of the frequency resource units participating in frequency hopping), for example, the preset frequency resource units participating in frequency hopping include 4 (corresponding to the number of the frequency resource units participating in frequency hopping) and 1 frequency resource unit (corresponding to the location information of the frequency resource units participating in frequency hopping) is spaced between adjacent frequency resource units participating in frequency hopping. The base station configures a frequency resource unit for the terminal through a terminal-specific RRC message or the terminal determined according to the terminal identifier to receive downlink control channel data (including unicast or paging downlink control channel data), and the frequency resource unit obtained by the terminal through the terminal-specific RRC message or the terminal determined according to the terminal identifier to receive the downlink control channel data is a 1 st frequency resource unit participating in downlink control channel data frequency hopping transmission; the frequency resource unit of the terminal indicated by the base station through the downlink control channel data and obtained by the terminal through the downlink control channel data for receiving the downlink shared channel data is the 1 st frequency resource unit participating in the frequency hopping transmission of the downlink shared channel data.
In this application example, in the process that the base station and the terminal determine the frequency resource units participating in frequency hopping (including configuring or acquiring the frequency resource units participating in frequency hopping through a message, or using preset frequency resource units participating in frequency hopping), it is supported to determine the frequency resource units participating in frequency hopping according to a loopback wrapaund manner. For example, assuming that X + Y is equal to 8 (i.e., data is transmitted or received in a range of 8 frequency resource units, which are included in the first bandwidth and have numbers other than the first bandwidth of 0 to 7 in sequence), the number of frequency resource units participating in frequency hopping includes 4, the interval between adjacent frequency resource units participating in frequency hopping is 1 frequency resource unit, and the 1 st frequency resource unit participating in frequency hopping is the number 6 frequency resource; the 2 nd, 3rd and 4 th frequency resource units participating in frequency hopping are the number 0, number 2 and number 4 units, respectively.
In this application example, the terminal performs or does not perform measurement of the channel state information using the DRMS in the range of X frequency resource elements outside the first bandwidth.
Application example 4
In the application example, the first system is deployed in the system bandwidth range of the second system, or the bandwidth of the first system and the bandwidth of the second system are mutually overlapped. The base station of the first system has established a communication connection with the terminal. A base station of a first system transmits data to a terminal in Y frequency resource units included in a first bandwidth (without using frequency resources other than the first bandwidth), or transmits data in X frequency resource units other than the first bandwidth (using frequency resources other than the first bandwidth); the terminal receives data in Y frequency resource unit ranges contained in the first bandwidth, or receives data in X frequency resource unit ranges outside the first bandwidth; x and Y are integers greater than 0.
In the application example, before the terminal receives the data, the terminal reports the capability that the terminal has the data received in the frequency resource range outside the first bandwidth to the base station through the terminal-specific RRC message; accordingly, before transmitting data to the terminal, the base station acquires the capability of receiving data in the frequency resource range outside the first bandwidth of the terminal through the terminal-specific RRC message. However, in this application example, the base station does not trigger the terminal to receive data in the frequency resource range outside the first bandwidth through the terminal-specific RRC message, and the terminal does not acquire trigger information for receiving data in the frequency resource range outside the first bandwidth through the terminal-specific RRC message. In this case, the base station transmits data to the terminal in Y frequency resource units included in the first bandwidth, and accordingly, the terminal receives data transmitted by the base station in Y frequency resource units included in the first bandwidth.
In the present application example, the base station indicates, through the downlink control channel data, which specific one of the Y frequency resource units is the frequency resource receiving the downlink shared channel data; the terminal determines which specific one of the Y frequency resource units to receive the downlink shared channel data through the downlink control channel data.
In this application example, when the downlink control channel data is unicast downlink control channel data, the base station configures to the terminal, through a terminal-specific RRC message, which of the Y frequency resource units is the specific frequency resource unit that receives the downlink control channel data; the terminal determines on which particular one of the Y frequency resource units to receive the downlink control channel data via a terminal-specific RRC message. When the bit overhead required to represent one of the Y frequency resource units is different from the bit overhead required to represent one of the X frequency resource units, the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: data is transmitted within X frequency resource units outside the first bandwidth. Wherein, when X (or Y) is equal to 1, the bit overhead required to characterize one frequency resource unit is considered to be zero.
In the application example, when the downlink control channel data is paging downlink control channel data, the base station configures a subset of frequency resource units available for receiving the downlink control channel data to the terminal through a system information block message and selects one of the subset of frequency resource units according to a terminal identifier (UE _ ID) to send the downlink control channel data to the terminal; in this case, the terminal acquires the subset of frequency resource units through the system information block message and selects one of the subset of frequency resource units to receive paging downlink control channel data according to the terminal identifier. Wherein any one of the subset of frequency resource units is one of the Y frequency resource units. Wherein, when the bit overhead required for representing one of the Y frequency resource units is different from the bit overhead required for representing one of the X frequency resource units, the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: data is transmitted (including transmitted and received) over X frequency resource units outside the first bandwidth.
Application example 5
In the application example, the first system is deployed in the system bandwidth range of the second system, or the bandwidth of the first system and the bandwidth of the second system are mutually overlapped. The base station of the first system has established a communication connection with the terminal. The base station transmits data to the terminal within Y frequency resource units included in the first bandwidth (without using frequency resources other than the first bandwidth), or transmits data to the terminal within Y frequency resource units included in the first bandwidth and X frequency resource units other than the first bandwidth (X + Y frequency resource units in total) (using frequency resources other than the first bandwidth); the terminal receives data in a range of Y frequency resource units contained in the first bandwidth, or receives data in a range of Y frequency resource units contained in the first bandwidth and X frequency resource units (total X + Y frequency resource units) outside the first bandwidth; x and Y are integers greater than 0.
In the application example, before receiving data, the terminal reports the capability that the terminal has the capability of receiving data in a frequency resource range outside the first bandwidth to the base station through the terminal-specific RRC message; accordingly, before transmitting data to the terminal, the base station acquires the capability of receiving data in the frequency resource range outside the first bandwidth of the terminal through the terminal-specific RRC message. However, in this application example, the base station does not trigger the terminal to receive data in the range of Y frequency resource units included in the first bandwidth and X frequency resource units outside the first bandwidth through the terminal-specific RRC message, and the terminal does not acquire trigger information for receiving data in the range of Y frequency resource units included in the first bandwidth and X frequency resource units outside the first bandwidth through the terminal-specific RRC message. In this case, the base station transmits data within a range of Y frequency resource units included in the first bandwidth; accordingly, the terminal receives data within a range of Y frequency resource units contained in the first bandwidth.
In the present application example, the base station indicates, through the downlink control channel data, which specific one of the Y frequency resource units is the frequency resource unit receiving the downlink shared channel data; the terminal determines which specific one of the Y frequency resource units to receive the downlink shared channel data through the downlink control channel data.
In this application example, when the downlink control channel data is unicast downlink control channel data, the base station configures to the terminal, through a terminal-specific RRC message, which of the Y frequency resource units is the specific frequency resource unit that receives the downlink control channel data; accordingly, the terminal determines on which specific one of the Y frequency resource units to receive the downlink control channel data through the terminal-specific RRC message. Wherein, when the bit overhead required to represent one of the Y frequency resource units is different from the bit overhead required to represent one of the X + Y frequency resource units, the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: data is transmitted (including transmitted and received) within a range of Y frequency resource units contained in the first bandwidth and X frequency resource units (X + Y frequency resource units in total) outside the first bandwidth.
In the application example, when the downlink control channel data is paging downlink control channel data, the base station configures a frequency resource unit subset which can be used for receiving the downlink control channel data to the terminal through a system information block message and selects one of the frequency resource unit subsets according to the UE _ ID to send the downlink control channel data to the terminal; in this case, the terminal acquires the subset of frequency resource units through the system information block message and selects one of the subset of frequency resource units to receive paging downlink control channel data according to the terminal identifier. Wherein any one of the frequency resource units in the subset of frequency resource units is one of the Y frequency resource units. When the bit overhead required to characterize one of the Y frequency resource units is different from the bit overhead required to characterize one of the X + Y frequency resource units, the payload of the downlink control channel data is different from the payload of the downlink control channel data used in the following scenario: data is transmitted within the range of Y frequency resource units of the first bandwidth and X frequency resource units (total X + Y frequency resource units) outside the first bandwidth, and downlink control channel data is currently being transmitted on one resource of the X frequency resource units outside the first bandwidth.
Application example 6
In application examples 1 to 5, the first system is an MTC system, and the second system is an NR system. The base station informs the terminal of data transmission on all OFDM symbols in the subframe through a main information block or a system information block 1 message; data is transmitted to the terminal on all OFDM symbols within the subframe. Correspondingly, the terminal learns that data is transmitted on all OFDM symbols in the subframe through the main information block message or the system information block 1 message; and receiving data transmitted by the base station on all OFDM symbols in the subframe.
It should be noted that, in addition to the above data (data in application examples 1 to 5), at least one of the following messages may also be transmitted on all OFDM symbols within a subframe: a master information block message, a system information block 1 message, other system information block messages except the system information block 1 message, a random access response message, a contention resolution message, a terminal-specific RRC connection setup message, other terminal-specific RRC messages except the RRC connection setup message (for simplicity of description, at least one of the above messages is simply referred to as a specific message); the master or system information block 1 message is used to inform or learn of data and specify that messages are transmitted on all OFDM symbols within a subframe at the same time. Alternatively, the terminal may consider that the configuration of the data and the specific message transmitted on all OFDM symbols in the subframe does not change, i.e. the data and the specific message transmitted on all OFDM symbols in the subframe is a long-term property of the system.
In a subframe in which the MTC system transmits data and/or a specific message, all OFDM symbols within the subframe are used for data or specific message transmission, which means that OFDM symbols (the previous OFDM symbol or symbols within the subframe) reserved for the LTE system control region are used for data or specific message transmission. The OFDM symbols reserved for the LTE system control area can be used for transmitting reference signals besides data or designated message transmission; the Reference Signal can be used by the terminal to demodulate data or a designated message, measure channel state information, and/or measure Reference Signal Receiving Power (RSRP)/Reference Signal Receiving Quality (RSRQ), among others. Alternatively, in a subframe for transmitting data, an OFDM symbol reserved for an LTE system control region is used for extended data transmission; in a subframe for transmitting the designated message, reserved OFDM symbols are used for transmitting reference signals; the master information block message or the system information block 1 message is used to inform or learn the above. Alternatively, in a subframe for transmitting data and a specified message, an OFDM symbol reserved for an LTE system control area is used for transmitting a reference signal; the master information block message or the system information block 1 message is used to inform or learn the above.
Application example 7
In the application example, the first system is deployed in the system bandwidth range of the second system; the first system is an MTC system and the second system is an NR system. A base station of a second system (namely an NR system) transmits at least one of a synchronization signal and a common control message of the second system in an invalid downlink subframe range of a first system (namely an MTC system); and the terminal of the corresponding second system receives at least one of the synchronization signal and the common control message of the second system in the invalid downlink subframe range of the first system. For example, suppose that a subframe 8 of one radio frame in the MTC system is an invalid downlink subframe, a base station of the NR system transmits at least one of a synchronization signal and a common control message of the NR system within the subframe 8 of the MTC system, and a terminal accessing the NR system receives at least one of a synchronization signal and a common control message of the NR system within the subframe 8 of the MTC system.
It should be noted that, if not specifically mentioned, the base station refers to a base station of the first system, the terminal refers to a terminal of the first system, and the first system is deployed in the system bandwidth of the second system, or the bandwidth of the first system and the bandwidth of the second system overlap with each other. For example, the first system is an MTC system, and the second system is an NR system; or, the first system is an LTE system, and the second system is an NR system; or the first system is an MTC system, and the second system is a WiMax system.
For example, when the first system is an MTC system and the second system is an NR system, the MTC system based on the current protocol version can only perform MTC data transmission within the Legacy MTC system bandwidth (corresponding to the first bandwidth herein); within the MTC system bandwidth range described above, cell-specific reference signals CRS are always present, even if there is no MTC data transmission. By the embodiment of the invention, when the MTC system and the NR system coexist, the base station can shunt the MTC terminal to the frequency resource without the MTC cell specific reference signal outside the Legacy MTC system bandwidth for data transmission; by adopting the operation, the required bandwidth size of the Legacy MTC system is indirectly reduced, and the influence of the cell-specific reference signal of the MTC system on NR data transmission is finally reduced.
The embodiment of the present invention further provides a data transmission apparatus, which is used to implement the foregoing embodiments and implementation manners, and the description of the apparatus is omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the following embodiments may be implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
As shown in fig. 5, the apparatus for data transmission according to the embodiment of the present invention is applied to a base station, and includes:
a first communication establishing module 51 for: establishing a communication connection with the terminal using only the frequency resources of the first bandwidth;
a first sending module 52 configured to:
transmitting a cell-specific reference signal using only frequency resources of the first bandwidth; and
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
In the embodiment of the invention, the CRS is transmitted only in the frequency resource range of the first bandwidth, and the base station shunts the terminal to the frequency resources except the first bandwidth to transmit data after the terminal is accessed, so that the range of the first bandwidth can be set to be smaller, thereby reducing the influence of the cell-specific reference signal on the data transmission of other communication systems when two or more communication systems coexist and improving the utilization rate of the frequency resources.
In an embodiment, the first sending module 52 is configured to:
taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and sending data to the terminal within the frequency resource range of the first frequency resource unit set; or
Taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and sending data to the terminal in the frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
In one embodiment, the method further comprises:
a first receiving module to: receiving information which is sent by the terminal and indicates that the terminal has the capability of receiving data in a frequency resource range outside a first bandwidth;
the first sending module 52 is further configured to: and sending triggering information to the terminal, wherein the triggering information is used for triggering the terminal to receive the data according to the first mode or the second mode.
In an embodiment, the first sending module 52 is further configured to:
sending range information of the first set of frequency resource units or range information of the second set of frequency resource units to the terminal, the range information including at least one of the following information: the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth.
In an embodiment, the first sending module 52 is further configured to:
sending information of frequency resource units participating in frequency hopping to the terminal, wherein the information of the frequency resource units participating in frequency hopping comprises at least one of the following: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
In one embodiment, the data includes downstream control channel data and downstream shared channel data,
the first sending module 52 is further configured to: before sending data to the terminal, sending first configuration information to the terminal, wherein the first configuration information is used for configuring a frequency resource unit for carrying data of the downlink control channel;
wherein, the frequency resource unit carrying the downlink shared channel data is indicated by the downlink control channel data; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
In an embodiment, the first sending module 52 is configured to:
and transmitting data to the terminal by adopting a transmission mode based on the demodulation reference signal.
In an embodiment, the first sending module 52 is configured to:
and transmitting the data to the terminal on all Orthogonal Frequency Division Multiplexing (OFDM) symbols in the subframe.
In the embodiment, all OFDM symbol resources in the subframe can be used for data transmission, and OFDM symbol resources do not need to be reserved for other systems, thereby further improving resource utilization efficiency and data transmission performance. For example, when MTC and NR systems coexist, it is not necessary to consider reserving OFDM symbol resources for the downlink control region of the LTE system in a subframe, and all OFDM symbol resources in the subframe can be used for MTC data transmission in the MTC system.
In an embodiment, the first sending module 52 is further configured to:
and transmitting at least one of a synchronization signal and a common control message of the NR system within the invalid downlink subframe range.
By the embodiment, when the MTC and the NR system coexist, the interference between the physical downlink channel data transmission of the MTC system and the synchronous signal transmission of the NR system can be effectively avoided.
An embodiment of the present invention further provides a base station, including:
a processor;
a memory for storing the processor-executable instructions;
communication means for performing information transceiving communication according to control of the processor;
wherein the processor is configured to perform the following operations:
transmitting a cell-specific reference signal using only frequency resources of a first bandwidth;
establishing a communication connection with a terminal using only the frequency resources of the first bandwidth;
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
In one embodiment, the processor is further configured to:
taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and sending data to the terminal within the frequency resource range of the first frequency resource unit set; or
Taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and sending data to the terminal in the frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
In one embodiment, the processor is further configured to:
receiving information which is sent by a terminal and indicates that the terminal has the capability of receiving data in a frequency resource range outside a first bandwidth in the process of establishing communication connection with the terminal or after establishing communication connection with the terminal;
and sending triggering information to the terminal, wherein the triggering information is used for triggering the terminal to receive the data according to the first mode or the second mode.
In one embodiment, the processor is further configured to:
sending range information of the first set of frequency resource units or range information of the second set of frequency resource units to the terminal, the range information including at least one of the following information: the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth.
In one embodiment, the processor is further configured to:
sending information of frequency resource units participating in frequency hopping to the terminal, wherein the information of the frequency resource units participating in frequency hopping comprises at least one of the following: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
In one embodiment, the data includes downstream control channel data and downstream shared channel data, and the processor is further configured to:
before sending data to the terminal, sending first configuration information to the terminal, wherein the first configuration information is used for configuring a frequency resource unit for carrying data of the downlink control channel;
wherein, the frequency resource unit carrying the downlink shared channel data is indicated by the downlink control channel data; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
The processor is further configured to perform the following operations:
and transmitting data to the terminal by adopting a transmission mode based on the demodulation reference signal.
The processor is further configured to perform the following operations:
and transmitting the data to the terminal on all Orthogonal Frequency Division Multiplexing (OFDM) symbols in the subframe.
The processor is further configured to perform the following operations:
before sending data to the terminal, sending second configuration information to the terminal, wherein the second configuration information is used for indicating that the data is transmitted on all OFDM symbols in a subframe.
The processor is further configured to perform the following operations:
and transmitting at least one of a synchronization signal and a common control message of the NR system within the invalid downlink subframe range.
The embodiment of the present invention further provides a data transmission apparatus, which is used to implement the foregoing embodiments and implementation manners, and the description of the apparatus is omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the following embodiments may be implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
As shown in fig. 6, the apparatus for data transmission according to the embodiment of the present invention is applied to a terminal, and includes:
a second communication establishing module 61, configured to: establishing a communication connection with a base station using only frequency resources of a first bandwidth;
a second receiving module 62, configured to:
transmitting a cell-specific reference signal using only frequency resources of the first bandwidth; and
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
In the embodiment of the invention, the CRS is transmitted only in the frequency resource range of the first bandwidth, and the terminal can transmit data on the frequency resources except the first bandwidth after the terminal is accessed, so that the range of the first bandwidth can be smaller, thereby reducing the influence of the cell-specific reference signal on the data transmission of other communication systems when two or more communication systems coexist and improving the utilization rate of the frequency resources.
In an embodiment, the second receiving module 62 is configured to:
taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and receiving data sent by the base station in a frequency resource range of the first frequency resource unit set; or
Taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and receiving data transmitted by the base station in a frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
In one embodiment, the method further comprises:
a second sending module, configured to: transmitting information indicating that a terminal has a capability of receiving data in a frequency resource range outside the first bandwidth to the base station;
a second receiving module 62, further configured to: and receiving trigger information sent by the base station, wherein the trigger information is used for triggering the terminal to receive the data according to a first mode or a second mode.
In an embodiment, the second receiving module 62 is further configured to:
receiving range information of the first set of frequency resource units or range information of the second set of frequency resource units sent by the base station, where the range information includes at least one of the following information: the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth.
In an embodiment, the second receiving module 62 is further configured to:
receiving information of frequency resource units participating in frequency hopping; wherein the information of the frequency resource units participating in frequency hopping includes at least one of: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
In an embodiment, the data includes downlink control channel data and downlink shared channel data, and the second receiving module 62 is further configured to:
receiving first configuration information sent by the base station, wherein the first configuration information is used for acquiring a frequency resource unit for bearing data of the downlink control channel;
acquiring a frequency resource unit carrying the data of the downlink shared channel through the data of the downlink control channel; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
In an embodiment, the second receiving module 62 is configured to:
and receiving the data transmitted by the base station by adopting a transmission mode based on the demodulation reference signal.
In one embodiment, the method further comprises:
and the measuring module is used for measuring the channel state information by using the received demodulation reference signal in the frequency resource range outside the first bandwidth.
In an embodiment, the second receiving module 62 is configured to:
receiving the data transmitted by the base station on all OFDM symbols within a subframe.
In the embodiment, all OFDM symbol resources in the subframe can be used for data transmission, and OFDM symbol resources do not need to be reserved for other systems, thereby further improving resource utilization efficiency and data transmission performance. For example, when MTC and NR systems coexist, it is not necessary to consider reserving OFDM symbol resources for the downlink control region of the LTE system in a subframe, and all OFDM symbol resources in the subframe can be used for MTC data transmission in the MTC system.
In an embodiment, the second receiving module 62 is further configured to:
and receiving at least one of a synchronization signal and a common control message of the NR system within the invalid downlink subframe range.
By the embodiment, when the MTC and the NR system coexist, the interference between the physical downlink channel data transmission of the MTC system and the synchronous signal transmission of the NR system can be effectively avoided.
An embodiment of the present invention further provides a terminal, including:
a processor;
a memory for storing the processor-executable instructions;
communication means for performing information transceiving communication according to control of the processor;
wherein the processor is configured to perform the following operations:
receiving a cell-specific reference signal using only frequency resources of a first bandwidth;
establishing a communication connection with a base station using only frequency resources of the first bandwidth;
receiving data sent by the base station according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
In one embodiment, the processor is further configured to:
taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and receiving data sent by the base station in a frequency resource range of the first frequency resource unit set; or
Taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and receiving data transmitted by the base station in a frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
In one embodiment, the processor is further configured to:
during the process of establishing communication connection with the base station or after establishing communication connection with the base station, sending information indicating that the terminal has the capability of receiving data in a frequency resource range outside the first bandwidth to the base station;
and receiving trigger information sent by the base station, wherein the trigger information is used for triggering the terminal to receive the data according to a first mode or a second mode.
In one embodiment, the processor is further configured to:
receiving range information of the first set of frequency resource units or range information of the second set of frequency resource units sent by the base station, where the range information includes at least one of the following information: the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth.
In an embodiment, the location information of the X frequency resource units is represented by frequency range information of a second bandwidth, and the processor is further configured to:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resources of the second bandwidth into X frequency resource units to obtain the position information of the X resource units;
when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapping part of the second bandwidth and the first bandwidth into X frequency resource units to obtain the position information of the X resource units.
In an embodiment, the location information of the X frequency resource units is represented by frequency range information of the second bandwidth and a frequency resource unit index, and the processor is further configured to:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resources of the second bandwidth into N frequency resource units; when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapped part of the second bandwidth and the first bandwidth into N frequency resource units; wherein N is an integer greater than or equal to X;
and obtaining frequency resource indexes corresponding to X frequency resource units in the N frequency resource units according to the frequency resource unit indexes, and obtaining the position information of the X resource units.
In an embodiment, the position information of the X frequency resource units is represented by frequency range information of the second bandwidth and an index of a first resource block occupied by each of the X frequency resource units, and the processor is further configured to:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resource of the second bandwidth into a plurality of resource blocks; or when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapping part of the second bandwidth and the first bandwidth into a plurality of resource blocks;
and obtaining the position information of the X resource units according to the index of the first resource block occupied by each frequency resource unit in the X frequency resource units.
In one embodiment, the processor is further configured to:
adopting preset or receiving information of frequency resource units participating in frequency hopping; wherein the information of the frequency resource units participating in frequency hopping includes at least one of: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
In one embodiment, the data includes downstream control channel data and downstream shared channel data, and the processor is further configured to:
before receiving data sent by the base station, receiving first configuration information sent by the base station, wherein the first configuration information is used for acquiring a frequency resource unit for bearing data of the downlink control channel;
acquiring a frequency resource unit carrying the data of the downlink shared channel through the data of the downlink control channel; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
In one embodiment, the processor is further configured to:
and receiving the data transmitted by the base station by adopting a transmission mode based on the demodulation reference signal.
In one embodiment, the processor is further configured to:
and measuring the channel state information by using the received demodulation reference signal in a frequency resource range outside the first bandwidth.
In one embodiment, the processor is further configured to:
receiving the data transmitted by the base station on all OFDM symbols within a subframe.
In an embodiment, before receiving the data transmitted by the base station, the processor is further configured to:
receiving second configuration information; and acquiring that the data is transmitted on all OFDM symbols in the subframe according to the second configuration information.
In one embodiment, the processor is further configured to:
and receiving at least one of a synchronization signal and a common control message of the NR system within the invalid downlink subframe range.
Embodiments of the present invention further provide a computer-readable storage medium storing computer-executable instructions, where the computer-executable instructions are used to execute the method for data transmission shown in fig. 1.
An embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, where the computer-executable instructions are used to execute the method for data transmission shown in fig. 2.
In this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different from that described herein, or they may be separately fabricated into integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (55)

1. A method of data transmission, wherein cell-specific reference signals are transmitted using only frequency resources of a first bandwidth, the method comprising:
establishing a communication connection with a terminal using only the frequency resources of the first bandwidth;
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
2. The method of claim 1,
the sending data to the terminal according to the first mode includes: taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and sending data to the terminal within the frequency resource range of the first frequency resource unit set;
the sending data to the terminal according to the second mode includes: taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and sending data to the terminal in the frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
3. The method of claim 1 or 2, wherein prior to transmitting data to the terminal in the first mode or the second mode, further comprising:
receiving information which is sent by the terminal and indicates that the terminal has the capability of receiving data in a frequency resource range outside a first bandwidth;
and sending triggering information to the terminal, wherein the triggering information is used for triggering the terminal to receive the data according to the first mode or the second mode.
4. The method of claim 2, wherein the method further comprises:
sending range information of the first set of frequency resource units or range information of the second set of frequency resource units to the terminal, the range information including at least one of the following information:
the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth.
5. The method of claim 4,
the location information of the X frequency resource units is represented by one of the following ways:
frequency range information for a second bandwidth;
frequency range information and a frequency resource unit index of the second bandwidth;
frequency range information of the second bandwidth and an index of a first resource block occupied by each frequency resource unit in the X frequency resource units;
and the physical frequency point information corresponding to each frequency resource unit in the X frequency resource units.
6. The method of claim 5, wherein the frequency range information of the second bandwidth comprises at least one of:
frequency position information of the second bandwidth, and bandwidth width information of the second bandwidth.
7. The method of claim 2, further comprising:
sending information of frequency resource units participating in frequency hopping to the terminal, wherein the information of the frequency resource units participating in frequency hopping comprises at least one of the following: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
8. The method of claim 2, wherein the data comprises downstream control channel data and downstream shared channel data, and wherein prior to transmitting the data to the terminal, the method further comprises:
sending first configuration information to the terminal, wherein the first configuration information is used for configuring a frequency resource unit for carrying the data of the downlink control channel;
wherein, the frequency resource unit carrying the downlink shared channel data is indicated by the downlink control channel data; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
9. The method of claim 8, wherein the downlink control channel data comprises unicast downlink control channel data and paging downlink control channel data;
when the downlink control channel data is unicast downlink control channel data, the first configuration information is information of a frequency resource unit bearing the downlink control channel data;
when the downlink control channel data is paging downlink control channel data, the first configuration information is information of a subset of frequency resource units that can carry the downlink control channel data, or information of frequency resource units that carry the downlink control channel data.
10. The method of claim 8,
the downlink control channel data is paging downlink control channel data, the downlink shared channel data is paging downlink shared channel data, and when data is sent to the terminal in the frequency resource range of the second frequency resource unit set:
the frequency resource unit bearing the paging downlink control channel data is one of Y frequency resource units contained in the first bandwidth, and the frequency resource unit bearing the paging downlink shared channel data is one of the Y frequency resource units contained in the first bandwidth; or,
the frequency resource unit bearing the paging downlink control channel data is one frequency resource unit in the first frequency resource unit set, and the frequency resource unit bearing the paging downlink shared channel data is one frequency resource unit in the second frequency resource unit set.
11. The method according to any one of claims 1 to 2 and 4 to 10, wherein the sending data to the terminal comprises:
and transmitting data to the terminal by adopting a transmission mode based on the demodulation reference signal.
12. The method according to any one of claims 1 to 2 and 4 to 10, wherein the sending data to the terminal comprises:
and transmitting the data to the terminal on all Orthogonal Frequency Division Multiplexing (OFDM) symbols in the subframe.
13. The method of claim 12, wherein prior to transmitting data to the terminal, the method further comprises:
and sending second configuration information to the terminal, wherein the second configuration information is used for indicating that the data is transmitted on all OFDM symbols in the subframe.
14. The method of any one of claims 1-2 and 4-10, further comprising:
and transmitting at least one of a synchronization signal and a common control message of the new radio frequency NR system within the invalid downlink subframe range.
15. A method of data transmission, wherein a cell-specific reference signal is received using only frequency resources of a first bandwidth, the method comprising:
establishing a communication connection with a base station using only frequency resources of the first bandwidth;
receiving data sent by the base station according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
16. The method of claim 15,
the receiving data transmitted by the base station according to the first mode includes: taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and receiving data sent by the base station in a frequency resource range of the first frequency resource unit set;
the receiving data transmitted by the base station according to the second mode includes: taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and receiving data transmitted by the base station in a frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
17. The method of claim 15 or 16, wherein before receiving the data transmitted by the base station in the first mode or the second mode, further comprising:
transmitting information indicating that a terminal has a capability of receiving data in a frequency resource range outside the first bandwidth to the base station;
and receiving trigger information sent by the base station, wherein the trigger information is used for triggering the terminal to receive the data according to a first mode or a second mode.
18. The method of claim 16, wherein the method further comprises:
receiving range information of the first set of frequency resource units or range information of the second set of frequency resource units sent by the base station, where the range information includes at least one of the following information:
the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth.
19. The method of claim 18, wherein the location information of the X frequency resource units is represented by frequency range information of a second bandwidth, the method further comprising:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resources of the second bandwidth into X frequency resource units to obtain the position information of the X resource units;
when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapping part of the second bandwidth and the first bandwidth into X frequency resource units to obtain the position information of the X resource units.
20. The method of claim 18, wherein the location information of the X frequency resource units is represented by frequency range information of a second bandwidth and a frequency resource unit index, the method further comprising:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resources of the second bandwidth into N frequency resource units; when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapped part of the second bandwidth and the first bandwidth into N frequency resource units; wherein N is an integer greater than or equal to X;
and obtaining frequency resource unit indexes corresponding to X frequency resource units in the N frequency resource units according to the frequency resource unit indexes, and obtaining the position information of the X resource units.
21. The method of claim 18, wherein the location information of the X frequency resource units is represented by frequency range information of the second bandwidth and an index of a first resource block occupied by each of the X frequency resource units, the method further comprising:
when the second bandwidth is not overlapped with the first bandwidth, dividing the frequency resource of the second bandwidth into a plurality of resource blocks; or when the second bandwidth is overlapped with the first bandwidth, dividing the frequency resources except the overlapping part of the second bandwidth and the first bandwidth into a plurality of resource blocks;
and obtaining the position information of the X resource units according to the index of the first resource block occupied by each frequency resource unit in the X frequency resource units.
22. The method according to claim 18, wherein the location information of the X frequency resource units is represented by physical frequency point information corresponding to each of the X frequency resource units.
23. The method of any of claims 19-21, wherein the frequency range information of the second bandwidth comprises at least one of:
frequency position information of the second bandwidth, and bandwidth width information of the second bandwidth.
24. The method of claim 16, further comprising:
adopting preset or receiving information of frequency resource units participating in frequency hopping; wherein the information of the frequency resource units participating in frequency hopping includes at least one of: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
25. The method of claim 16, wherein the data comprises downlink control channel data and downlink shared channel data, and wherein prior to receiving the data transmitted by the base station, the method further comprises:
receiving first configuration information sent by the base station, wherein the first configuration information is used for acquiring a frequency resource unit for bearing data of the downlink control channel;
acquiring a frequency resource unit carrying the data of the downlink shared channel through the data of the downlink control channel; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
26. The method of claim 25, wherein the downlink control channel data comprises unicast downlink control channel data and paging downlink control channel data;
when the downlink control channel data is unicast downlink control channel data, the first configuration information is information of a frequency resource unit bearing the downlink control channel data; or
When the downlink control channel data is paging downlink control channel data, the first configuration information is information of a subset of frequency resource units that can carry the downlink control channel data, or information of frequency resource units that carry the downlink control channel data.
27. The method of claim 16, wherein the downlink control channel data is paging downlink control channel data, wherein the downlink shared channel data is paging downlink shared channel data, and wherein when receiving data transmitted by the base station within the frequency resource range of the second set of frequency resource units:
the frequency resource unit bearing the paging downlink control channel data is one of Y frequency resource units contained in the first bandwidth, and the frequency resource unit bearing the paging downlink shared channel data is one of the Y frequency resource units contained in the first bandwidth; or,
the frequency resource unit bearing the paging downlink control channel data is one of the X frequency resource units outside the first bandwidth, and the frequency resource unit bearing the paging downlink shared channel data is one of the second frequency resource unit set.
28. The method of any one of claims 15 to 16, 18 to 22 and 24 to 27, wherein the receiving data transmitted by the base station comprises:
and receiving the data transmitted by the base station by adopting a transmission mode based on the demodulation reference signal.
29. The method of any one of claims 15-16, 18-22, and 24-27, further comprising:
and measuring the channel state information by using the received demodulation reference signal in a frequency resource range outside the first bandwidth.
30. The method of any one of claims 15 to 16, 18 to 22 and 24 to 27, wherein the receiving data transmitted by the base station comprises:
receiving the data transmitted by the base station on all OFDM symbols within a subframe.
31. The method of claim 30, wherein prior to receiving data transmitted by the base station, the method further comprises:
receiving second configuration information; and acquiring that the data is transmitted on all OFDM symbols in the subframe according to the second configuration information.
32. The method of any of claims 15-16, 18-22, and 24-27, further comprising:
and receiving at least one of a synchronization signal and a common control message of the NR system within the invalid downlink subframe range.
33. An apparatus for data transmission, comprising:
a first communication establishment module to: establishing a communication connection with the terminal using only the frequency resources of the first bandwidth;
a first sending module configured to:
transmitting a cell-specific reference signal using only frequency resources of the first bandwidth; and
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
34. The apparatus of claim 33, wherein the first sending module is configured to:
taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and sending data to the terminal within the frequency resource range of the first frequency resource unit set; or
Taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and sending data to the terminal in the frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
35. The apparatus of claim 33 or 34, further comprising:
a first receiving module to: receiving information which is sent by the terminal and indicates that the terminal has the capability of receiving data in a frequency resource range outside a first bandwidth;
the first sending module is further configured to: and sending triggering information to the terminal, wherein the triggering information is used for triggering the terminal to receive the data according to the first mode or the second mode.
36. The apparatus of claim 34, wherein the first sending module is further configured to:
sending range information of the first set of frequency resource units or range information of the second set of frequency resource units to the terminal, the range information including at least one of the following information: the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth.
37. The apparatus of claim 34, wherein the first sending module is further configured to:
sending information of frequency resource units participating in frequency hopping to the terminal, wherein the information of the frequency resource units participating in frequency hopping comprises at least one of the following: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
38. The apparatus of claim 34, wherein the data comprises downstream control channel data and downstream shared channel data,
the first sending module is further configured to: before sending data to the terminal, sending first configuration information to the terminal, wherein the first configuration information is used for configuring a frequency resource unit for carrying data of the downlink control channel;
wherein, the frequency resource unit carrying the downlink shared channel data is indicated by the downlink control channel data; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
39. The apparatus of any one of claims 33-34 and 36-38, wherein the first sending module is configured to:
and transmitting data to the terminal by adopting a transmission mode based on the demodulation reference signal.
40. The apparatus of any one of claims 33-34 and 36-38, wherein the first sending module is configured to:
and transmitting the data to the terminal on all Orthogonal Frequency Division Multiplexing (OFDM) symbols in the subframe.
41. The apparatus of any one of claims 33-34 and 36-38, wherein the first sending module is further configured to: and transmitting at least one of a synchronization signal and a common control message of the new radio frequency NR system within the invalid downlink subframe range.
42. A base station, comprising:
a processor;
a memory for storing the processor-executable instructions;
communication means for performing information transceiving communication according to control of the processor;
wherein the processor is configured to perform the following operations:
transmitting a cell-specific reference signal using only frequency resources of a first bandwidth;
establishing a communication connection with a terminal using only the frequency resources of the first bandwidth;
sending data to the terminal according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
43. An apparatus for data transmission, comprising:
a second communication establishment module to: establishing a communication connection with a base station using only frequency resources of a first bandwidth;
a second receiving module to:
receiving a cell-specific reference signal using only frequency resources of a first bandwidth; and
receiving data sent by the base station according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
44. The apparatus of claim 43, wherein the second receiving module is to:
taking X frequency resource units out of a first bandwidth as a first frequency resource unit set, and receiving data sent by the base station in a frequency resource range of the first frequency resource unit set; or
Taking Y frequency resource units contained in the first bandwidth and X frequency resource units outside the first bandwidth as a second frequency resource unit set, and receiving data transmitted by the base station in a frequency resource range of the second frequency resource unit set;
wherein the frequency resource unit is composed of one or more continuous resource blocks, and X and Y are integers greater than 0.
45. The apparatus of claim 43 or 44, further comprising:
a second sending module, configured to: transmitting information indicating that a terminal has a capability of receiving data in a frequency resource range outside the first bandwidth to the base station;
a second receiving module, further configured to: and receiving trigger information sent by the base station, wherein the trigger information is used for triggering the data to be received according to a first mode or a second mode.
46. The apparatus of claim 44, wherein the second receiving module is further configured to:
receiving range information of the first set of frequency resource units or range information of the second set of frequency resource units sent by the base station, where the range information includes at least one of the following information: the value of X, the position information of the X frequency resource units and the frequency range information of the first bandwidth.
47. The apparatus of claim 44, wherein the second receiving module is further configured to:
receiving information of frequency resource units participating in frequency hopping; wherein the information of the frequency resource units participating in frequency hopping includes at least one of: the number information of the frequency resource units participating in frequency hopping, and the interval information between the adjacent frequency resource units participating in frequency hopping.
48. The apparatus of claim 44, wherein the data comprises downstream control channel data and downstream shared channel data, and wherein the second receiving module is further configured to:
receiving first configuration information sent by the base station, wherein the first configuration information is used for acquiring a frequency resource unit for bearing data of the downlink control channel;
acquiring a frequency resource unit carrying the data of the downlink shared channel through the data of the downlink control channel; the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the first frequency resource unit set, or the frequency resource unit bearing the downlink control channel data is one frequency resource unit in the second frequency resource unit set; the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the first frequency resource unit set, or the frequency resource unit bearing the downlink shared channel data is one or more frequency resource units in the second frequency resource unit set.
49. The apparatus according to any one of claims 43 to 44 and 46 to 48, wherein the second receiving module is configured to:
and receiving the data transmitted by the base station by adopting a transmission mode based on the demodulation reference signal.
50. The apparatus of any one of claims 43-44 and 46-48, further comprising:
and the measuring module is used for measuring the channel state information by using the received demodulation reference signal in the frequency resource range outside the first bandwidth.
51. The apparatus according to any one of claims 43 to 44 and 46 to 48, wherein the second receiving module is configured to:
receiving the data transmitted by the base station on all OFDM symbols within a subframe.
52. The apparatus of any of claims 43-44 and 46-48, the second receiving module further configured to: and receiving at least one of a synchronization signal and a common control message of the NR system within the invalid downlink subframe range.
53. A terminal, comprising:
a processor;
a memory for storing the processor-executable instructions;
communication means for performing information transceiving communication according to control of the processor;
wherein the processor is configured to perform the following operations:
receiving a cell-specific reference signal using only frequency resources of a first bandwidth;
establishing a communication connection with a base station using only frequency resources of the first bandwidth;
receiving data sent by the base station according to a first mode or a second mode; the first mode is to transmit data only in a frequency resource range outside the first bandwidth, and the second mode is to transmit data in the first bandwidth and a frequency resource range outside the first bandwidth.
54. A computer-readable storage medium storing computer-executable instructions for performing the method of any one of claims 1-14.
55. A computer-readable storage medium storing computer-executable instructions for performing the method of any one of claims 15-32.
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