WO2014036965A1 - 设备间d2d通信中传输参考信号的方法和装置 - Google Patents
设备间d2d通信中传输参考信号的方法和装置 Download PDFInfo
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- WO2014036965A1 WO2014036965A1 PCT/CN2013/083078 CN2013083078W WO2014036965A1 WO 2014036965 A1 WO2014036965 A1 WO 2014036965A1 CN 2013083078 W CN2013083078 W CN 2013083078W WO 2014036965 A1 WO2014036965 A1 WO 2014036965A1
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0016—Time-frequency-code
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
Definitions
- the present invention relates to the field of communications, and more particularly to a method and apparatus for transmitting reference signals in D2D communication between devices. Background technique
- D2D Device to Device
- a terminal for example, User Equipment (UE)
- a terminal for example, User Equipment (UE)
- the base station for example, an evolved base station (eNB)
- eNB evolved base station
- the D2D communication link considers sharing target resources with existing communication systems.
- D2D communication does not use the downlink resources of the communication system (base-to-terminal link).
- base-to-terminal link Only the uplink resources of the communication system (the link from the terminal to the base station) are multiplexed, because the anti-interference ability of the base station is much stronger than that of the ordinary terminal. It is highly probable that two D2D devices perform time division multiplexing on the uplink resource, so that it is not required to support simultaneous transmission and reception, and only one device needs to transmit when another device transmits.
- a target resource for carrying a reference signal (RS, Reference Signal) is fixed.
- RS Reference Signal
- an uplink demodulation reference signal (UL DRS, Uplink Demodulation Reference Signal) is carried in two subframes.
- Symbol an example of a target resource
- these two symbols are located in the middle of two slots. Therefore, in the D2D communication link, for the transmission of the RS, the transmission method of the UL RS in the existing communication system can be considered, that is, through the middle of each slot. Symbols are transmitted.
- Embodiments of the present invention provide a method and apparatus for transmitting a reference signal in D2D communication between devices, which can ensure transmission of reference signals between pairs of terminals.
- a first aspect provides a method for transmitting a reference signal in D2D communication between devices, the method comprising: determining, by a first user equipment, a target resource for carrying a reference signal RS from a communication resource for performing D2D communication, the target The resource is determined by the feature information used when the target resource is selected, and the feature information used when the target resource is selected includes at least one of the following two items: feature information for uniquely identifying the first user device, and And characteristic information of the second user equipment that uniquely identifies the D2D communication with the first user equipment; the first user equipment transmits the RS to the second user equipment by using the target resource.
- the determining, by the first user equipment, the target resource for carrying the RS from the communication resource for performing the D2D communication includes: the feature information used by the first user equipment according to the selected target resource Selecting the target resource from the communication resource; before the first user equipment transmits the RS to the second user equipment by using the target resource, the method further includes: sending, to the second user equipment, first information, where the first information is used by the first user equipment And the feature information used by the first user equipment to select the target resource, so that the second user equipment determines the target resource according to the first information; or sends the second information to the second user equipment, the second The information is used to indicate the target resource, so that the second user equipment determines the target resource according to the second information.
- the selecting, by the first user equipment, the target resource from the communication resource according to the feature information used when the target resource is selected includes: The first user equipment according to the feature information used when the target resource is selected, from And selecting, in the preset at least two configuration patterns, a target configuration pattern, where each configuration pattern is used to indicate a resource used to carry the RS in the communication resource; and the resource used to carry the RS indicated by the target configuration pattern is used as the target a resource; and the second information is used to indicate the target configuration pattern.
- the first user equipment uses the characteristic information used when selecting the target resource from the communication resource. Selecting the target resource includes: determining, by the first user equipment, the offset value according to the feature information used when the target resource is selected, where the offset value is used to indicate that the target resource is relative to the preset in the preset configuration pattern. An offset of a resource for carrying the RS; determining the target resource according to the offset value and the configuration pattern; and the second information is used to indicate the offset value.
- the first user equipment selects the target resource according to the Selecting the target resource from the communication resource includes: determining, by the first user equipment, the configuration value according to the feature information used when the target resource is selected, where the configuration value is used to indicate that the target resource is preset. Configuring a location in the pattern; determining the target resource according to the configuration value and the configuration pattern; and the second information is used to indicate the configuration value.
- the target resource The second user equipment is selected from the communication resource according to the feature information used when the target resource is selected, and the target resource that is used by the first user equipment to carry the RS from the communication resource for performing the D2D communication includes: Receiving, by the first user equipment, the third user equipment, where the third information is used to indicate the feature information used by the second user equipment to select the target resource, and determining the target resource according to the third information; or The first user equipment receives the fourth user equipment, and sends the fourth information, where the fourth information is used to indicate the target resource, and determines the target resource according to the fourth information.
- the target resource is a communication information that is sent by the base station device according to the feature information used when the target resource is selected.
- the first user equipment receives the fifth information, where the fifth information is used to indicate the characteristic information used by the base station device to select the target resource, and Determining the target resource according to the fifth information; or the first user equipment receives the base station device to send the sixth information, where the sixth information is used to indicate the target resource, and the target resource is determined according to the sixth information.
- the target resource includes at least one of a time domain resource, a frequency domain resource, a spatial domain resource, and a code domain resource.
- a second aspect provides a method for transmitting a reference signal in D2D communication between devices, where the method includes: acquiring feature information used when selecting a target resource, where the feature information used when selecting the target resource includes at least one of the following two items: Item: feature information for uniquely identifying the first user equipment, and feature information for uniquely identifying a second user equipment that performs D2D communication with the first user equipment; according to the feature information used when selecting the target resource, Determining, by the communication resource for performing the D2D communication, the target resource for carrying the reference signal RS; sending, to the at least one user equipment of the first user equipment and the second user equipment, fifth indication information, where the fifth information is used And indicating to the at least one user equipment, according to the fifth information, the target resource for carrying the RS, or sending the sixth indication information to the at least one user equipment, where the Six information is used to indicate the target resource, so that the at least one user equipment is configured according to the The sixth information determines the target resource for carrying the RS.
- the selecting, according to the feature information used when selecting the target resource, the target resource for carrying the RS from the communication resource used for performing the D2D communication includes: according to the selecting the target resource
- the feature information used is selected from at least two preset configuration patterns. a target configuration pattern, where each configuration pattern is used to indicate a resource for carrying an RS in the communication resource; a resource for carrying the RS indicated by the target configuration pattern is used as the target resource; and the sixth information is used to indicate The target configuration pattern.
- the target resource of the RS includes: determining, according to the feature information used when the target resource is selected, an offset value, where the offset value is used to indicate that the target resource is used to carry the RS in a preset configuration pattern with respect to a preset Offset of the resource; determining the target resource according to the offset value and the configuration pattern; and the sixth information is used to indicate the offset value.
- the feature information used according to the selected target resource is used to perform the D2D communication.
- Selecting the target resource for carrying the RS in the communication resource includes: determining, according to the feature information used when selecting the target resource, the configuration value, where the configuration value is used to indicate the location of the target resource in the preset configuration pattern And determining, according to the configuration value and the configuration pattern, the target resource; and the sixth information is used to indicate the configuration value.
- the target resource includes a time domain resource and a frequency domain resource. At least one of a spatial domain resource or a code domain resource.
- a third aspect provides an apparatus for transmitting a reference signal in D2D communication between devices, the apparatus comprising: a processing unit, configured to: determine, by a first user equipment, from a communication resource for performing D2D communication, for using a reference signal RS a target resource, and controlling the receiving unit and the sending unit to transmit the RS by using the target resource, where the target resource is determined by using feature information used when the target resource is selected, and the feature information used when selecting the target resource includes the following: At least one of two items: feature information for uniquely identifying the first user equipment, and feature information for uniquely identifying a second user equipment that performs D2D communication with the first user equipment; a receiving unit, configured to receive The RS; send the order Element, used to send the RS.
- the processing unit is configured to select the target resource from the communication resource according to the feature information used when the target resource is selected, and the sending unit is further configured to send the second user device a message, the first information is used to indicate the feature information used by the first user equipment to select the target resource, so that the second user equipment determines the target resource according to the first information; or is used for the second The user equipment sends the second information, where the second information is used to indicate the target resource, so that the second user equipment determines the target resource according to the second information.
- the processing unit is specifically configured to use at least two configuration patterns according to the feature information used when the target resource is selected. Selecting a target configuration pattern, where each configuration pattern is used to indicate a resource for carrying an RS in a communication resource; a resource for carrying the RS indicated by the target configuration pattern is used as the target resource; and the second Information is used to indicate the target configuration pattern.
- the processing unit is specifically configured to determine, according to the feature information used when selecting the target resource, An offset value, the offset value is used to indicate an offset of the target resource in a preset configuration pattern with respect to a preset resource for carrying the RS, and is configured to determine the identifier according to the offset value and the configuration pattern. a target resource; and the second information is used to indicate the offset value.
- the processing unit is specifically configured to select the target according to the Determining a configuration value, where the configuration value is used to indicate a location of the target resource in the preset configuration pattern; determining the target resource according to the configuration value and the configuration pattern; and the second information Used to indicate this configuration value.
- the target resource Is the second user equipment from the communication according to the feature information used when the target resource is selected Selected by the resource
- the receiving unit is further configured to receive, by the second user equipment, third information, where the third information is used to indicate feature information used by the second user equipment to select the target resource
- the processing unit further uses Determining the target resource according to the third information; or the receiving unit is further configured to receive, by the second user equipment, fourth information, where the fourth information is used to indicate the target resource, and the processing unit is further configured to use, according to the first Four information, determine the target resource.
- the target resource is selected by the base station device according to the feature information used when the target resource is selected, and the receiving unit is further configured to receive, by the base station device, fifth information, where the fifth information is used to indicate the base station.
- the feature information used by the device to select the target resource the processing unit is further configured to determine the target resource according to the fifth information; or the receiving unit is further configured to receive, by the base station device, sixth information, where the sixth information is used.
- the target resource is indicated, and the processing unit is further configured to determine the target resource according to the sixth information.
- the target resource includes at least one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource.
- the fourth aspect provides an apparatus for transmitting a reference signal in D2D communication between devices, where the apparatus includes: an acquiring unit, configured to acquire feature information used when selecting a target resource, where the feature information used when selecting the target resource includes the following two At least one of the items: feature information for uniquely identifying the first user device, and feature information for uniquely identifying a second user device that performs D2D communication with the first user device; Selecting, by using the feature information used in the target resource, the target resource for carrying the reference signal RS from the communication resources for performing the D2D communication; and the sending unit, configured to be used in the first user equipment and the second user equipment At least one user equipment sends fifth indication information, where the fifth information is used to indicate characteristic information used when selecting the target resource, so that Determining, by the at least one user equipment, the target resource for carrying the RS according to the fifth information, or sending the sixth indication information to the at least one user equipment, where the sixth information is used to indicate the target resource, so as to facilitate the at least one
- the user equipment determines the
- the processing unit is configured to select a target configuration pattern from the preset at least two configuration patterns according to the feature information used when the target resource is selected, where each configuration pattern is used. And indicating the RS resource used to carry the RS in the communication resource; the RS resource used for the mapping according to the target configuration pattern as the target resource; and the sixth information is used to indicate the target configuration pattern.
- the processing unit is specifically configured to determine an offset value according to the feature information used when selecting the target resource, where the offset value is used by And indicating the offset of the target resource in the preset configuration pattern with respect to the preset RS resource, where the configuration pattern is used to indicate the RS resource used to carry the RS in the communication resource, and is configured to determine the identifier according to the offset value.
- a target resource; and the sixth information is used to indicate the offset value.
- the processing unit is specifically configured to determine the configuration according to the feature information used when selecting the target resource.
- a value the configuration value is used to indicate a location of the target resource in the communication resource; to determine the target resource according to the configuration value; and the sixth information is used to indicate the configuration value.
- the target resource includes a time domain resource and a frequency domain resource. At least one of a spatial domain resource or a code domain resource.
- FIG. 1 is a schematic flow chart of a method of transmitting a reference signal in D2D communication between devices according to an embodiment of the present invention.
- FIG. 2a is a schematic diagram showing a resource configuration for carrying a reference signal according to an embodiment of the present invention.
- Figure 2b is a schematic diagram showing another resource configuration for carrying a reference signal in accordance with an embodiment of the present invention.
- 2c is a schematic diagram showing still another resource configuration for carrying a reference signal according to an embodiment of the present invention.
- Figure 3a is a schematic diagram showing a resource configuration for carrying a reference signal according to another embodiment of the present invention.
- Figure 3b is a schematic diagram showing the resource configuration for carrying a reference signal in accordance with still another embodiment of the present invention.
- Figure 3c is a schematic diagram showing the resource configuration for carrying a reference signal in accordance with still another embodiment of the present invention.
- FIG. 4 is a schematic flow chart of a method of transmitting a reference signal in D2D communication between devices according to another embodiment of the present invention.
- FIG. 5 is a schematic block diagram of an apparatus for transmitting a reference signal in D2D communication between devices according to an embodiment of the present invention.
- FIG. 6 is a schematic block diagram of an apparatus for transmitting a reference signal in D2D communication between devices according to another embodiment of the present invention. detailed description
- GSM Global System of Mobile Communication
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- LTE-A Long Term Evolution
- a user equipment which may also be called a mobile terminal (Mobile Terminal), a mobile user equipment, a terminal device, etc., may be connected to one or more cores via a radio access network (eg, RAN, Radio Access Network).
- the network communicates, and the user equipment can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a mobile device that can be portable, pocket, handheld, computer built, or in-vehicle. They exchange language and/or data with the radio access network.
- the user equipment refers to a user equipment capable of D2D communication.
- the base station device may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNB or e-NodeB, evolutional Node B) in LTE.
- BTS Base Transceiver Station
- NodeB base station
- eNB evolved base station
- e-NodeB evolutional Node B
- the home base station (HeNB or He-NodeB, Home evolutional Node B) the present invention is not limited, but for convenience of description, the following embodiment takes Node B as an example for description.
- FIG. 1 shows a schematic flow diagram of a method 100 of transmitting reference signals in inter-device D2D communication, as described from the perspective of a user equipment, in accordance with an embodiment of the present invention.
- the two user equipments of the D2D communication are referred to as the first user equipment and the second user equipment.
- the methods for transmitting the reference signals of the two user equipments are the same or corresponding. Therefore, the following is convenient for understanding.
- the action of the user equipment side will be described by taking the action of the first user equipment as an example.
- the first user equipment listed above may be the originating end of the D2D communication, or may be the receiving end of the D2D communication, that is, the first user equipment may be any one of the two user equipments performing D2D communication,
- the invention is not particularly limited.
- the method 100 includes:
- the first user equipment determines, from a communication resource used for performing D2D communication, a target resource for carrying a reference signal RS, where the target resource is determined by using feature information used when the target resource is selected, where the target resource is selected.
- the used feature information includes at least one of the following: feature information for uniquely identifying the first user device, and feature information for uniquely identifying a second user device that performs D2D communication with the first user device;
- the first user equipment transmits the RS to the second user equipment by using the target resource.
- the basis for determining the target resource for carrying the RS may be pre-defined, for example, as an example
- the user equipment may determine, according to the feature information of the originating end and/or the receiving end of the D2D communication, the resource (including a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource) for performing D2D communication.
- the user equipment may use resources (including time domain resources, frequency domain resources, airspace resources, or code domains) for performing D2D communication according to the first feature information (feature information of the originating end and/or the receiving end of the D2D communication).
- the user equipment determines the first target resource, such as a time domain resource, and the user equipment extracts resources (including time domain resources) for performing D2D communication according to the second feature information (feature information of the originating end and/or the receiving end of the D2D communication) , a frequency domain resource, a spatial domain resource, or a code domain resource) determines a second target resource, such as a frequency domain resource.
- the user equipment can determine the target resource using the basis (the feature information of the first user equipment and/or the feature information of the second user equipment) corresponding to the provision according to regulations.
- the second feature information may be the same or different, and the present invention is not specifically limited.
- a time domain resource if two symbols in one subframe are used to carry the RS, it is used for determining.
- the feature information of the first symbol and the feature information for determining the second symbol may be the same or different, and the present invention is not particularly limited.
- the feature information is information that uniquely indicates the user equipment in the communication system.
- the device can obtain (for example, the user equipment can acquire the feature information of the peer device when the D2D communication is established).
- UE ID User Equipment Identity
- Radio Network Temporary Identity the feature information is the peer user.
- the device can obtain (for example, the user equipment can acquire the feature information of the peer device when the D2D communication is established).
- the description of the same or similar cases is omitted.
- the first user equipment may autonomously select the target resource from resources (including time domain resources, frequency domain resources, airspace resources, or code domain resources) for performing D2D communication, and notify the second user equipment. , that is, corresponding to case 1.
- the second user equipment may autonomously select the target resource from resources (including time domain resources, frequency domain resources, air domain resources, or code domain resources) for performing D2D communication, so that the first user equipment may be according to the second user equipment.
- the notification determines the target resource, ie, corresponding to situation 2.
- the base station device may select the target resource from resources (including time domain resources, frequency domain resources, airspace resources, or code domain resources) for performing D2D communication, so that the first user equipment and the second user equipment may be according to the base station equipment.
- resources including time domain resources, frequency domain resources, airspace resources, or code domain resources
- the determining, by the first user equipment, the target resource for carrying the RS from the communication resource for performing the D2D communication includes:
- the first user equipment selects the target resource from the communication resources according to the feature information used when the target resource is selected;
- the method further includes:
- the target resource is only one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the target resource includes at least two of a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource.
- the at least two resources are based on the same feature information (for example, feature information of the same user equipment, or both feature information of the two user equipments), then the first user equipment may be based on the first user
- the feature information of the device and/or the feature information of the second user device are selected from the resources for performing the D2D communication, or the mapping relationship between the feature information and the target resource is determined.
- the uplink uses the multiple carrier frequency division multiple access (SC-FDM A, Single Carrier Frequency Division Multiple Access) multiple access mode
- SC-FDM A Single Carrier Frequency Division Multiple Access
- all the symbols are maintained in order to maintain the single carrier characteristics.
- Subcarriers frequency domain resources
- the reference signal needs to occupy at least one symbol and cannot be refined to the resource element (RE, Resource Element) level. Therefore, in this case, the selection of the frequency domain resource may be disregarded. For example, it may be designed as a target resource with only one symbol in one subframe.
- all demodulation is based on extrapolation, or Interpolation can also be considered when adjacent subframes have RSs that can be borrowed.
- the RS may be transmitted with more than two symbols, and the present invention is not particularly limited. In the embodiment of the present invention, whether there is one symbol, two symbols, or more symbols, the RS (the time domain resource, the frequency domain resource, the airspace resource, and the code domain resource) are not fixed, and the user is not fixed.
- the device or the base station may select a resource for carrying the RS from the D2D target resource according to the feature information of the user equipment. E.g:
- the selecting, by the first user equipment, the target resource from the communication resource according to the feature information used when the target resource is selected includes:
- the first user equipment selects a target configuration pattern from the preset at least two configuration patterns according to the feature information used when the target resource is selected, where each configuration pattern is used to indicate that the communication resource is used to carry the RS.
- the resource indicated by the target configuration pattern for carrying the RS is used as the target resource; and the second information is used to indicate the target configuration pattern.
- a plurality of (for example, eight) configuration patterns may be set in advance, the configuration patterns indicating one subframe (a resource for performing D2D communication) for 7-carrier RS (for example, demodulation reference signal ( RS, Demodulation Reference Signal ) )
- RS demodulation reference signal
- Figure 2a shows one pattern
- Figure 2b shows another pattern
- Figure 2c shows another pattern.
- the first user equipment may determine the D2D communication according to the feature information of the user equipment (the feature information of the first user equipment, or the feature information of the second user, or the feature information of the first user equipment and the feature information of the second user) The pattern used.
- a number may be determined by modulating the total number of preset patterns on the preset pattern (for example, it may be represented by 3 bits), and the number may be used to indicate that the pattern used in the D2D communication is preset.
- the number in the pattern for example, 8
- the first user equipment may send the sequence number of the selected pattern in all patterns to the second user equipment, and the second user equipment may determine, according to the sequence number, the first user equipment selects Pattern , and use the target resource indicated by the pattern to carry the RS.
- the feature information when the feature information is a numerical value, the feature information may be directly used to determine a target resource (eg, a pattern number), and when the feature information is another expression (eg, a letter, etc.), the preset information may also be preset.
- An algorithm determines a feature parameter (referred to as S) corresponding to the feature information, and for example, the feature parameter S may be determined by any one of the following formulas 1 to 3,
- the feature information of the first user equipment is represented
- x 2 represents the feature information of the second user equipment
- f ( ) represents the mapping relationship between the feature information and the feature parameter.
- the mapping relationship between the feature information and the feature parameter It may be linear or non-linear, and the present invention is not particularly limited. Therefore, the feature parameter can be used to replace the feature information in the above process, and the calculation is performed.
- one feature parameter S may only uniquely correspond to one user equipment or a pair of user equipments.
- the description of the same or similar cases is omitted.
- the feature parameter S is used as a basis for selecting (or determining) a target resource.
- the selecting, by the first user equipment, the target resource from the communication resource according to the feature information used when the target resource is selected includes:
- the first user equipment determines an offset value according to the feature information used when the target resource is selected, where the offset value is used to indicate that the target resource is in a preset configuration pattern with respect to a preset resource used to carry the RS. Offset
- the second information is used to indicate the offset value.
- a default pattern can be specified.
- the value of the feature parameter S exceeds the number of symbols in the subframe, the value of the feature parameter S is modulo the number of symbols in the subframe.
- the first user equipment may send the determined offset value to the second user equipment, and the second user equipment may determine, according to the offset value, the target resource for carrying the RS from the preset pattern.
- the selecting, by the first user equipment, the target resource from the communication resource according to the feature information used when the target resource is selected includes:
- the second information is used to indicate the configuration value.
- one or more symbols in the time domain resource may be indicated by the feature parameter S, for example, the feature number S is used to indicate the sequence number of the symbol in all symbols, so that the symbol can be determined and the symbol is Host RS on it. And, if the value of the feature parameter S exceeds the number of symbols, the value of the feature parameter S is modulo the number of symbols, and the number of the symbol in all symbols is determined according to the modulus value.
- the first user equipment may send the determined configuration value to the second user equipment, and the second user equipment may determine, according to the configuration value, the target resource for carrying the RS from the preset pattern.
- orthogonal frequency division multiple access OFDMA, Orthogonal Frequency
- two ports can be allowed to be multiplexed on one RE, using the same sequence, with different orthogonal masks (OCC, Orthogonal).
- OCC orthogonal mask
- Cover Code makes a distinction; the sequences between different cells are orthogonal. Using a sequence on a symbol, the sequence itself can allow 12 cyclic shifts (CS, Cyclic Shift). Therefore, you can use two or four port (port) patterns directly (as shown in Figure 3a).
- the user equipment or the base station may select resources for carrying the RS from the D2D target resources according to the feature information (or feature parameters) of the user equipment, including time domain resources (symbols), frequency domain resources (subcarriers), and the like.
- the user equipment or the base station may select resources for carrying the RS from the D2D target resources according to the feature information (or feature parameters) of the user equipment, including time domain resources (symbols), frequency domain resources (subcarriers), and airspace. Resources (ports), etc., for example:
- Multiple patterns can be set in advance, which indicates the symbols carrying RS in one subframe.
- FIG. 3b An example of the first target resource and/or a subcarrier (an example of the second target resource), as shown in FIG. 3b is a pattern, and FIG. 3c is a pattern.
- the pattern used is determined according to the characteristic parameter S.
- the pattern used may be determined by modulo the total number of patterns of the feature parameter S to the pattern, and if the symbols for carrying the RS (an example of the target resource) are plural, the relative of the plurality of symbols
- the resources may not be fixed, i.e., different symbols may be selected according to different feature parameters S (for example, one symbol is selected according to Si and the other symbol is selected according to s 2 ).
- the parameter S can also be used to indicate subcarrier (frequency domain resource), antenna port (space resource), RS sequence, OCC or CS.
- One or more symbols in the time domain resource may be indicated by the feature parameter S, eg, the sequence number of the symbol in all symbols, and the RS is carried on the symbol. And, if the characteristic parameter S If the value exceeds the number of symbols, the value of the feature parameter S is modulo the number of symbols, and the number of the symbol in all symbols is determined according to the modulus value.
- the parameter S can also be used to indicate subcarrier (frequency domain resource), antenna port (space resource), RS sequence, OCC or CS.
- the method of transmitting a reference signal according to an embodiment of the present invention can effectively reduce the overhead of the reference signal.
- the relative positions of the plurality of resources may be fixed, that is, the same displacement (eg, time domain shift) may be calculated from the same feature information.
- the relative positions of the multiple resources may not be fixed, that is, different time domain shifts may be obtained according to different feature parameters S, and different resources are selected (for example, one symbol is selected according to Si, and another symbol is selected according to S 2 ).
- the first user The device may select the first target resource from the resources for performing the D2D communication according to the feature information of the first user equipment, or determine the mapping relationship between the feature information of the first user equipment and the first target resource.
- the second target resource is selected from the resources for performing the D2D communication according to the feature information of the second user equipment, or the mapping relationship between the feature information of the second user equipment and the second target resource is determined. .
- the first target resource and the second target resource are different resources, but the specific types of the first target resource and the second target resource are not limited, that is, the first target
- the resource may be one or more of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the second target resource may be a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource and the first target resource. Different resources.
- the target resource includes a time domain resource, a frequency domain resource, and an air domain. At least two of the resource or code domain resources, and
- the first user equipment Determining, by the first user equipment, the target resource for carrying the reference signal RS from the communication resource, the first user equipment selecting the first target resource according to the feature information of the first user equipment and/or the feature information of the second user equipment ;
- the second target resource is selected according to the feature information of the first user equipment and/or the feature information of the second user equipment.
- the first user equipment determines to select the first configuration pattern according to the feature information of the first user equipment and/or the feature information of the second user equipment, and the first user equipment according to the feature information of the first user equipment and/or the second
- the process of determining the feature information of the user equipment determines that the process of selecting the second configuration pattern is similar to the process described in the methods a to f.
- the description thereof is omitted.
- the method for the second user equipment to determine the target resource may be the same as the method for the first user equipment to select the target resource. Therefore, in this case, the first user equipment needs to notify the second user equipment target.
- the resource is specifically determined according to the feature information of the first user equipment or the feature information of the second user equipment, to ensure that the second user equipment can accurately determine the target resource.
- the process of determining the target resource by the second user equipment according to the feature information is similar to the process of selecting the target resource by the second user equipment according to the feature information.
- the description is omitted.
- the first user equipment may directly directly indicate information about the target resource (second information, for example, a sequence number of a symbol carrying the RS in the subframe, The sequence number of the configuration pattern, the offset value of the target resource, and the like are sent to the second user equipment, so that the second user equipment can determine the target resource according to the information indicating the target resource.
- second information for example, a sequence number of a symbol carrying the RS in the subframe.
- the sequence number of the configuration pattern, the offset value of the target resource, and the like are sent to the second user equipment, so that the second user equipment can determine the target resource according to the information indicating the target resource.
- the target resource is selected by the second user equipment from the communication resource according to the feature information used when the target resource is selected, and
- Determining, by the first user equipment, a communication resource for performing D2D communication, for carrying the RS Target resources include:
- the first user equipment receives the fourth user equipment to send fourth information, where the fourth information is used to indicate the target resource, and the target resource is determined according to the fourth information.
- the target resource when the target resource is only one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource, or the target resource includes a time domain resource, a frequency domain resource, and an air domain resource. Or at least two of the code domain resources, and the at least two resources are determined according to the feature information of the same user equipment, and the second user equipment may be based on the feature information of the first user equipment or the second user equipment.
- the feature information selects a target resource from among resources for performing the D2D communication, or determines a mapping relationship between the feature information and the target resource.
- the second user equipment may be according to the first The feature information of the user equipment is selected from the resources for performing the D2D communication, or the mapping relationship between the feature information of the first user equipment and the first target resource is determined. And, the second target resource is selected from the resources for performing the D2D communication according to the feature information of the second user equipment, or the mapping relationship between the feature information of the second user equipment and the second target resource is determined. .
- the first target resource and the second target resource are different resources, but the specific types of the first target resource and the second target resource are not limited, that is, the first target
- the resource may be one or more of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the second target resource may be a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource and the first target resource. Different resources.
- the method and the process for the second user equipment to select the target resource are the same as the method and the process for the first user equipment to select the target resource.
- the description thereof is omitted.
- the method for the first user equipment to determine the target resource may be the same as the method for the second user equipment to select the target resource. Therefore, in this case, the second user equipment needs to notify the first user equipment target.
- the resource is specifically determined according to the feature information of the first user equipment or the feature information of the second user equipment, to ensure that the first user equipment can accurately determine the target resource.
- the process of determining the target resource by the first user equipment according to the feature information is similar to the process of selecting the target resource by the first user equipment according to the feature information.
- the description thereof is omitted.
- the second user equipment may directly directly indicate information about the target resource (for example, a location of the target resource in the communication resource, a selected configuration pattern, and a target.
- the offset value of the resource, etc. is sent to the first user equipment, so that the first user equipment can determine the target resource according to the information indicating the target resource.
- a plurality of patterns may be set in advance, the pattern indicating a symbol (an example of a first target resource) and/or a subcarrier (an example of a second target resource) carrying an RS in one subframe, and the first user equipment according to the first
- the fourth information notified by the user equipment determines the pattern used.
- the fourth information indication 2 represents the use of the number 2 patchem for this D2D communication.
- a pattern may be selected as the default pattern, and the fourth information indicates a time domain shift/frequency domain shift/space shift/code field shift.
- the fourth information indicates that 2 represents the RS that carries the RS from the default pattern.
- the symbol determined after the symbol is shifted to the right by two units is the symbol (target resource) used to carry the RS in the D2D communication.
- the fourth information indicates one or more symbols in the time domain resource, e.g., the sequence number of the symbol in all symbols, and carries the RS on the symbol.
- the target resource is selected by the base station device from the communication resource according to the feature information used when the target resource is selected, and
- the determining, by the first user equipment, the target resource includes: The first user equipment receives the fifth information sent by the base station device, where the fifth information is used to indicate the feature information used by the base station device to select the target resource, and determines the target resource according to the fifth information; or
- the base station device Receiving, by the first user equipment, the base station device, the sixth information, where the sixth information is used to indicate the target resource, and determining the target resource according to the sixth information.
- the target resource includes at least one of a time domain resource, a frequency domain resource, an air domain resource, and a code domain resource.
- the target resource when the target resource is only one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource, or the target resource includes a time domain resource, a frequency domain resource, and an air domain resource. Or at least two of the code domain resources, and the at least two resources are determined according to the feature information of the same user equipment, and the base station device may be based on the feature information of the first user equipment or the feature information of the second user equipment. And selecting, from the resources for performing the D2D communication, the target resource, or determining the mapping relationship between the feature information and the target resource.
- the base station device may be according to the first The feature information of the user equipment is selected from the resources for performing the D2D communication, or the mapping relationship between the feature information of the first user equipment and the first target resource is determined.
- the second target resource is selected from the resources for performing the D2D communication according to the feature information of the second user equipment, or the mapping relationship between the feature information of the second user equipment and the second target resource is determined.
- the first target resource and the second target resource are different resources, but the specific types of the first target resource and the second target resource are not limited, that is, the first target
- the resource may be one or more of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the second target resource may be a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource and the first target resource. Different resources.
- a method and a process for a base station device to select a target resource and a first user equipment The method and process for selecting the target resource are the same, and the description thereof is omitted here to avoid redundancy.
- the method for the first user equipment to determine the target resource may be the same as the method for the base station device to select the target resource. Therefore, in this case, the base station device needs to notify the first user equipment that the target resource is specifically based on The feature information of the first user equipment is determined by the feature information of the second user equipment to ensure that the first user equipment can accurately determine the target resource.
- the process of determining the target resource by the first user equipment according to the feature information is similar to the process of selecting the target resource according to the feature information by the first user equipment.
- the description thereof is omitted.
- the base station device may directly directly indicate information about the target resource (for example, a location of the target resource in the communication resource, a selected configuration pattern, and a target resource.
- the offset value, etc. is sent to the first user equipment, so that the first user equipment can determine the target resource according to the information indicating the target resource.
- a plurality of patterns may be set in advance, the pattern indicating a symbol (an example of a first target resource) and/or a subcarrier (an example of a second target resource) carrying an RS in one subframe, and the first user equipment according to the first
- the fourth information notified by the user equipment determines the pattern used.
- the fourth information indication 2 represents the use of the number 2 patchem for this D2D communication.
- a pattern may be selected as the default pattern, and the fourth information indicates a time domain shift/frequency domain shift/space shift/code field shift.
- the fourth information indicates that 2 represents the RS that carries the RS from the default pattern.
- the symbol determined after the symbol is shifted to the right by two units is the symbol (target resource) used to carry the RS in the D2D communication.
- the fourth information indicates one or more symbols in the time domain resource, e.g., the sequence number of the symbol in all symbols, and carries the RS on the symbol.
- FIG. 4 is a schematic flow chart of a method 200 of transmitting reference signals in D2D communication between devices according to an embodiment of the present invention, as described from the perspective of a base station device. As shown in FIG.
- the method 200 includes: S210, acquiring feature information used when selecting a target resource, where the feature information used when selecting the target resource includes at least one of the following two items: for uniquely identifying the first user Feature information of the device, and feature information for uniquely identifying the second user device that performs D2D communication with the first user device;
- S230 Send, to the at least one user equipment of the first user equipment and the second user equipment, fifth indication information, where the fifth information is used to indicate feature information used when the target resource is selected, so that the at least one user equipment is configured according to the at least one user equipment. Determining, by the fifth information, the target resource for carrying the RS, or sending the sixth indication information to the at least one user equipment, where the sixth information is used to indicate the target resource, so that the at least one user equipment is configured according to the sixth Information, determining the target resource for carrying the RS. .
- the base station device can acquire the feature information of the user equipment that performs the D2D communication between the devices.
- the feature information can be directly used to determine the target resource for carrying the RS (hereinafter, The cartridge is called the target resource.
- the pattern number when the feature information is other expressions (for example, letters, etc.), the feature parameters corresponding to the feature information can be determined by a preset algorithm (function, formula, etc.) S), for example, the characteristic parameter S can be determined by any of the above formulas 1 to 3.
- the mapping relationship between the feature information and the feature parameter may be linear or non-linear, and the present invention is not particularly limited.
- the feature parameter can be used instead of the feature information in the above process to perform calculation.
- one feature parameter S may only uniquely correspond to one user equipment or a pair of user equipments.
- the description of the same or similar cases is omitted.
- the feature parameter S is used as a basis for selecting (or determining) a target resource.
- the user equipment when determining the target resource used for loading the RS, may specify that the user equipment is from the feature information (or the determined feature parameter corresponding to the feature information) of the originating end (or the receiving end) of the D2D communication from the D2D communication for performing D2D communication.
- Resources including time domain resources, frequency domain resources, airspace resources, or code domain resources
- the user equipment may be configured to determine, according to the feature information of the originating end of the D2D communication, the first resource for carrying the reference signal from the resource for performing D2D communication, including the time domain resource, the frequency domain resource, the spatial domain resource, or the code domain resource.
- a target resource such as a time domain resource
- the resource including a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the base station device can determine the target resource by using the basis corresponding to the rule according to the above specification.
- the target resource is only one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource, or the target resource includes a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource. And at least two of the resources are based on the same feature information (for example, feature information of the same user equipment, or both feature information of the two user equipments), and the base station apparatus determines to use
- the target resources that carry the RS include:
- the base station device selects the target resource according to the feature information of the first user equipment and/or the feature information of the second user equipment.
- the target resource includes at least one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource for performing the D2D communication.
- the base station device may select a target resource from the resources for performing the D2D communication according to the feature information of the first user equipment and/or the feature information of the second user equipment, or determine the feature information and The mapping relationship of target resources.
- the uplink uses the multiple carrier frequency division multiple access (SC-FDM A, Single Carrier Frequency Division Multiple Access) multiple access mode
- SC-FDM A Single Carrier Frequency Division Multiple Access
- all the symbols are maintained in order to maintain the single carrier characteristics.
- Subcarriers frequency domain resources
- the reference signal needs to occupy at least one symbol and cannot be refined to the resource element (RE, Resource Element) level. Therefore, in this case, the selection of the frequency domain resource may be disregarded. For example, it may be designed as a target resource with only one symbol in one subframe.
- all demodulation is based on extrapolation, or Interpolation can also be considered when adjacent subframes have RSs that can be borrowed.
- the RS may be transmitted with more than two symbols, and the present invention is not particularly limited. In the embodiment of the present invention, whether there is one symbol, two symbols, or more symbols, the RS (the time domain resource, the frequency domain resource, the airspace resource, and the code domain resource) are not fixed, and the user is not fixed.
- the device or the base station may select a resource for carrying the RS from the D2D target resource according to the feature information of the user equipment.
- the selecting, according to the feature information used when the target resource is selected, the target resource for carrying the RS from the communication resource used for performing the D2D communication includes:
- each configuration pattern is used to indicate a resource for carrying the RS in the communication resource, according to the feature information used when the target resource is selected;
- the resource indicated by the target configuration pattern for carrying the RS is used as the target resource;
- the sixth information is used to indicate the target configuration pattern.
- a plurality of (for example, eight) configuration patterns may be set in advance, the configuration patterns indicating one subframe (a resource for performing D2D communication) for carrying an RS (for example, a demodulation reference signal (RS) , Demodulation Reference Signal ) )
- RS demodulation reference signal
- Figure 2a shows one pattern
- Figure 2b shows another pattern
- Figure 2c shows another pattern.
- the base station device may determine, according to the feature information of the user equipment (the feature information of the first user equipment, or the feature information of the second user, or the feature information of the first user equipment and the feature information of the second user), the D2D communication is used. Pattem.
- a number may be determined by modulating the total number of preset patterns on the preset pattern (for example, may be represented by 3 bits), and the number may be used to indicate that the pattern used in the D2D communication is preset.
- the number in the pattern for example, 8
- the feature information when the feature information is a numerical value, the feature information may be directly used to determine a target resource (eg, a pattern number), and when the feature information is another expression (eg, a letter, etc.), the preset information may also be preset.
- An algorithm determines a feature parameter (referred to as S) corresponding to the feature information, and for example, the feature parameter S can be determined by any of the above formulas 1 to 3.
- the mapping relationship between the feature information and the feature parameter may be linear or non-linear, and the present invention is not particularly limited. Therefore, the feature parameter can be used instead of the feature information in the above process to perform calculation.
- one feature parameter S may only uniquely correspond to one user equipment or a pair of user equipments.
- an offset value where the offset value is used to indicate an offset of the target resource in a preset configuration pattern relative to a preset resource for carrying the RS according to the feature information used when the target resource is selected; An offset value and the configuration pattern to determine the target resource;
- the sixth information is used to indicate the offset value.
- a default pattern can be specified.
- the symbol in which the symbol carrying the RS in the pattern is shifted to the right by two units is the symbol used to carry the RS in the D2D communication (an example of the target resource;).
- the value of the feature parameter S exceeds the number of symbols in the subframe, the value of the feature parameter S is modulo the number of symbols in the subframe.
- selecting the target resource for carrying the RS from the communication resource used for performing the D2D communication according to the feature information used when the target resource is selected includes:
- the sixth information is used to indicate the configuration value.
- one or more symbols in the time domain resource may be indicated by the feature parameter S, for example, the feature number S is used to indicate the sequence number of the symbol in all symbols, so that the symbol can be determined and the symbol is Host RS on it. And, if the value of the feature parameter S exceeds the number of symbols, the value of the feature parameter S is modulo the number of symbols, and the number of the symbol in all symbols is determined according to the modulus value.
- the uplink adopts multiple access mode of orthogonal frequency division multiple access OFDMA
- OFDMA orthogonal frequency division multiple access
- two ports airspace resources
- OCC orthogonal masks
- the sequences between different cells are orthogonal.
- CS Cyclic Shift
- the user equipment or the base station can obtain the D2D target according to the characteristic information (or characteristic parameters) of the user equipment.
- the source is used to select the resource used to carry the RS.
- the user equipment or the base station may select a resource for carrying the RS from the D2D target resource according to the feature information (or the feature parameter) of the user equipment, for example: j.
- a plurality of patterns may be preset, the pattern indicating one subframe.
- the symbol carrying the RS (an example of the first target resource) and/or the subcarrier (an example of the second target resource), as shown in FIG. 3b is a pattern
- FIG. 3c is a pattern.
- the pattern used is determined according to the characteristic parameter S.
- the pattern used may be determined by modulo the total number of patterns of the feature parameter S to the pattern, and if the symbols for carrying the RS (an example of the target resource) are plural, the relative of the plurality of symbols resources may not be fixed, i.e., different symbols may be selected depending on each characteristic parameter S (e.g., according to a symbol selection Si, S 2 in accordance with another symbol selection).
- k You can select a pattern as the default pattern (for example, as shown in Figure 3a, Figure 3b, or Figure 3c), with the parameter S as the corresponding time domain displacement/frequency domain displacement/space displacement/code domain shift (shift)
- the value of the parameter S exceeds the number of symbols in the sub-frame, the value of the parameter S is modulo the number of symbols in the sub-frame.
- the parameter S can also be used to indicate subcarrier (frequency domain resource), antenna port (space resource), RS sequence, OCC or CS.
- One or more symbols in the time domain resource may be indicated by the feature parameter S, for example, the sequence number of the symbol in all symbols, and the RS is carried on the symbol. And, if the value of the feature parameter S exceeds the number of symbols, the value of the feature parameter S is modulo the number of symbols, and the number of the symbol in all symbols is determined according to the modulus value.
- the parameter S can also be used to indicate subcarrier (frequency domain resource), antenna port (space resource), RS sequence, OCC or CS. Therefore, the method of transmitting a reference signal according to an embodiment of the present invention can effectively reduce the overhead of the reference signal.
- the relative positions of the plurality of resources may be fixed, that is, the same displacement (eg, time domain shift) may be calculated from the same feature information.
- the relative positions of the multiple resources may not be fixed, that is, different time domain shifts may be obtained according to different feature parameters S, and different resources are selected (for example, one symbol is selected according to Si, and another symbol is selected according to S 2 ).
- the target resource is at least two of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the target resource includes a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource. At least two of them, and
- the target resource for carrying the RS from the communication resources for performing the D2D communication including:
- the second target resource is selected according to the feature information of the first user equipment and/or the feature information of the second user equipment.
- the target resource includes at least two of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource for performing the D2D communication.
- the target resource when the target resource includes at least two of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource, the at least two resources are respectively determined according to feature information of different user equipments.
- the base station device may select, according to the feature information of the first user equipment, the first target resource from the resources used for performing the D2D communication, or determine the first user equipment.
- the second target resource is selected from the resources for performing the D2D communication according to the feature information of the second user equipment, or the mapping relationship between the feature information of the second user equipment and the second target resource is determined. .
- the first target resource and the second target resource are different resources, but the specific types of the first target resource and the second target resource are not limited, that is, the first target
- the resource may be one or more of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the second target resource may be a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource and the first target resource. Different resources.
- the base station device determines, according to the feature information of the first user equipment and/or the feature information of the second user equipment, the first configuration pattern to be selected, and the base station device according to the feature information of the first user equipment and/or the characteristics of the second user equipment.
- the process of determining the selection of the second configuration pattern is similar to the process described in the methods g to 1, and the description thereof is omitted here to avoid redundancy.
- the method for the user equipment to determine the target resource may be the same as the method for the base station device to select the target resource. Therefore, in this case, the base station device needs to notify the user that the target resource is specifically according to the first user equipment.
- the feature information is determined by the feature information of the second user equipment to ensure that the user equipment can accurately determine the target resource.
- the process of the user equipment determining the target resource according to the feature information is similar to the process of the base station device selecting the target resource according to the feature information.
- the description thereof is omitted.
- the base station device may directly send the information indicating the target resource (for example, the sequence number of the symbol carrying the RS in the subframe) to the user equipment.
- the user equipment can determine the target resource according to the information indicating the target resource.
- the method for transmitting a reference signal by determining a target resource for carrying a reference signal according to feature information of a user equipment performing inter-device communication, dynamic configuration of resources can be realized, so that even a terminal that communicates between devices In many cases, the transmission of reference signals between pairs of terminals can also be ensured.
- FIG. 5 is a schematic block diagram of an apparatus 300 for transmitting reference signals in D2D communication between devices, in accordance with an embodiment of the present invention. As shown in Figure 5, the apparatus 300 includes:
- the processing unit 310 is configured to enable the first user equipment to determine a target resource for carrying the reference signal RS from the communication resources for performing D2D communication, and control the receiving unit 320 and the sending unit 330 to transmit the RS by using the target resource, where
- the target resource is determined by the feature information used when the target resource is selected, and the feature information used when the target resource is selected includes at least one of the following two items: feature information for uniquely identifying the first user device And feature information for uniquely identifying the second user equipment that performs D2D communication with the first user equipment;
- the receiving unit 320 is configured to receive the RS.
- the sending unit 330 is configured to send the RS.
- the basis for determining the target resource for carrying the RS may be pre-defined, and by way of example and not limitation, the user equipment may specify: according to the feature information of the originating end and/or the receiving end of the D2D communication,
- the target resource is determined from resources (including time domain resources, frequency domain resources, air domain resources, or code domain resources) for performing D2D communication.
- the user equipment determines, according to the feature information of the originating end and/or the receiving end of the D2D communication, the resource (including a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource) for performing D2D communication.
- a first target resource carrying a reference signal such as a time domain resource
- the user equipment selects resources (including time domain resources, frequency domain resources, and airspace) for performing D2D communication according to characteristic information of the originating end and/or the receiving end of the D2D communication.
- the resource or code domain resource determines the second target resource, such as a frequency domain resource, for carrying the reference signal.
- the processing unit 310 can determine the target resource using the basis corresponding to the rule according to regulations. It should be understood that the basis for determining the first resource (characteristic information of the initiator and/or the receiver) enumerated above may be the same as the basis for determining the second resource (feature information of the initiator and/or the receiver). It may also be different (for example, determining the first resource according to the feature information of the initiator, The second resource is determined based on the feature information of the receiving end, and the present invention is not particularly limited.
- the feature information is information that uniquely indicates the user equipment in the communication system (for example, may be a user identifier of the user equipment, or a temporary identifier of the user equipment in the communication system), and the feature The information is available to the peer user equipment (for example, the user equipment can obtain the feature information of the peer device when the D2D communication is established).
- the description of the same or similar cases will be omitted.
- the processing unit 310 of the first user equipment may autonomously select the target resource from resources (including time domain resources, frequency domain resources, air domain resources, or code domain resources) for performing D2D communication, that is, Corresponding to case 4.
- the second user equipment may autonomously select the target resource from resources (including time domain resources, frequency domain resources, airspace resources, or code domain resources) for performing D2D communication, so that the first user equipment may be according to the second user equipment.
- the notification determines the target resource, ie, corresponding to case 5.
- the base station device may select the target resource from resources (including time domain resources, frequency domain resources, airspace resources, or code domain resources) for performing D2D communication, so that the first user equipment and the second user equipment may be according to the base station equipment.
- the notification determines the target resource, ie, corresponding to case 6. In the following, the three cases listed above will be described separately.
- the processing unit 310 is specifically configured to select the target resource from the communication resources according to the feature information used when the target resource is selected, and
- the sending unit 320 is further configured to send the first information to the second user equipment, where the first information is used to indicate feature information used by the first user equipment to select the target resource, so as to facilitate the second user setting. Determining the target resource according to the first information; or
- the target resource is only one of a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource
- the target resource includes a time domain resource, a frequency domain resource, and an air domain resource.
- at least two of the code domain resources wherein the at least two resources are based on the same feature information (for example, feature information of the same user equipment, or both feature information of the two user equipments), and the first user equipment
- the processing unit 310 may select a target resource from the resources for performing the D2D communication according to the feature information of the first user equipment and/or the feature information of the second user equipment, or determine the feature information and the target.
- the mapping relationship of resources may be selected from the resources for performing the D2D communication according to the feature information of the first user equipment and/or the feature information of the second user equipment, or determine the feature information and the target.
- the uplink uses the multiple carrier frequency division multiple access (SC-FDM A, Single Carrier Frequency Division Multiple Access) multiple access mode
- SC-FDM A Single Carrier Frequency Division Multiple Access
- all the symbols are maintained in order to maintain the single carrier characteristics.
- Subcarriers frequency domain resources
- the reference signal needs to occupy at least one symbol and cannot be refined to the resource element (RE, Resource Element) level. Therefore, in this case, the selection of the frequency domain resource may be disregarded. For example, it may be designed as a target resource with only one symbol in one subframe.
- all demodulation is based on extrapolation, or Interpolation can also be considered when adjacent subframes have RSs that can be borrowed.
- the RS may be transmitted with more than two symbols, and the present invention is not particularly limited. In the embodiment of the present invention, whether there is one symbol, two symbols, or more symbols, the RS (the time domain resource, the frequency domain resource, the airspace resource, and the code domain resource) are not fixed, and the user is not fixed.
- the device or the base station may select a resource for carrying the RS from the D2D target resource according to the feature information of the user equipment.
- the processing unit 310 is specifically configured to select a target configuration map from the preset at least two configuration patterns according to the feature information used when the target resource is selected.
- each configuration pattern is used to indicate a resource for carrying an RS in a communication resource; a resource for carrying the RS indicated by the target configuration pattern is used as the target resource; and the second information is used to indicate the Target configuration pattern.
- a plurality of (for example, eight) configuration patterns may be set in advance, the configuration patterns indicating one subframe (a resource for performing D2D communication) for 7-carrier RS (for example, demodulation reference signal ( RS, Demodulation Reference Signal ) )
- RS demodulation reference signal
- Figure 2a shows one pattern
- Figure 2b shows another pattern
- Figure 2c shows another pattern.
- the first user equipment may determine the D2D communication according to the feature information of the user equipment (the feature information of the first user equipment, or the feature information of the second user, or the feature information of the first user equipment and the feature information of the second user) The pattern used.
- a number may be determined by modulating the total number of preset patterns on the preset pattern (for example, it may be represented by 3 bits), and the number may be used to indicate that the pattern used in the D2D communication is preset.
- the number in the pattern for example, 8
- the feature information when the feature information is a numerical value, the feature information may be directly used to determine a target resource (eg, a pattern number), and when the feature information is another expression (eg, a letter, etc.), the preset information may also be preset.
- An algorithm determines a feature parameter (referred to as S) corresponding to the feature information, and for example, the feature parameter S can be determined by any of the above formulas 1 to 3. Therefore, the feature parameter can be used to replace the feature information in the above process, and the calculation is performed.
- one feature parameter S may only uniquely correspond to one user equipment or a pair of user equipments.
- the description of the same or similar cases is omitted.
- the feature parameter S is used as a basis for selecting (or determining) a target resource.
- the processing unit 310 is specifically configured to determine, according to the feature information used when the target resource is selected, an offset value, where the offset value is used to indicate that the target resource is relative to the preset in a preset configuration pattern.
- the second information is used to indicate the offset value.
- a default pattern can be specified.
- the symbol in which the symbol carrying the RS in the pattern is shifted to the right by two units is the symbol used to carry the RS in the D2D communication (an example of the target resource;).
- the value of the feature parameter S exceeds the number of symbols in the sub-frame, the value of the feature parameter S is modulo the number of symbols in the sub-frame.
- the processing unit 310 is specifically configured to determine, according to the feature information used when the target resource is selected, the configuration value, where the configuration value is used to indicate that the target resource is in a preset configuration. The position in the drawing;
- the second information is used to indicate the configuration value.
- one or more symbols in the time domain resource may be indicated by the feature parameter S, for example, the feature number S is used to indicate the sequence number of the symbol in all symbols, so that the symbol can be determined and the symbol is Host RS on it. And, if the value of the feature parameter S exceeds the number of symbols, the value of the feature parameter S is modulo the number of symbols, and the number of the symbol in all symbols is determined according to the modulus value.
- the uplink adopts multiple access mode of orthogonal frequency division multiple access OFDMA
- OFDMA orthogonal frequency division multiple access
- two ports airspace resources
- OCC orthogonal masks
- the sequences between different cells are orthogonal.
- CS Cyclic Shift
- the user equipment or the base station may select a resource for carrying the RS from the D2D target resource according to the feature information (or the feature parameter) of the user equipment.
- the user equipment or the base station may select a resource for carrying the RS from the D2D target resource according to the feature information (or the feature parameter) of the user equipment, for example: d.
- a plurality of patterns may be preset, the pattern indicating one subframe.
- the symbol carrying the RS (an example of the first target resource) and/or the subcarrier (an example of the second target resource), as shown in FIG. 3b is a pattern
- FIG. 3c is a pattern.
- the pattern used is determined according to the characteristic parameter S.
- the pattern used may be determined by modulo the total number of patterns of the feature parameter S to the pattern, and if the symbols for carrying the RS (an example of the target resource) are plural, the relative of the plurality of symbols resources may not be fixed, i.e., different symbols may be selected depending on each characteristic parameter S (e.g., according to a symbol selection Si, S 2 in accordance with another symbol selection).
- a pattern as the default pattern (for example, as shown in Figure 3a, Figure 3b or Figure 3c), with the parameter S as the corresponding time domain displacement / frequency domain displacement / spatial domain displacement / code domain displacement (shift)
- the value of the parameter S exceeds the number of symbols in the sub-frame, the value of the parameter S is modulo the number of symbols in the sub-frame.
- the parameter S can also be used to indicate subcarrier (frequency domain resource), antenna port (space resource), RS sequence, OCC or CS.
- One or more symbols in the time domain resource may be indicated by the feature parameter S, for example, the sequence number of the symbol in all symbols, and the RS is carried on the symbol. And, if the value of the feature parameter S exceeds the number of symbols, the value of the feature parameter S is modulo the number of symbols, and the number of the symbol in all symbols is determined according to the modulus value.
- the parameter S can also be used to indicate subcarrier (frequency domain resource), antenna port (space resource), RS sequence, OCC or CS.
- the apparatus for transmitting a reference signal can effectively reduce the reference signal s expenses.
- the relative positions of the plurality of resources may be fixed, that is, the same displacement (eg, time domain shift) may be calculated from the same feature information.
- the relative positions of the multiple resources may not be fixed, that is, different time domain shifts may be obtained according to different feature parameters S, and different resources are selected (for example, one symbol is selected according to Si, and another symbol is selected according to S 2 ).
- the target resource includes at least two of a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource, and
- the processing unit 310 is specifically configured to select the first target resource according to the feature information of the first user equipment and/or the feature information of the second user equipment;
- the at least two resources are respectively determined according to feature information of different user equipments.
- the processing unit 310 of the first user equipment may select, according to the feature information of the first user equipment, the first target resource from the resources for performing the D2D communication, or determine the feature information of the first user equipment. A mapping relationship with the first target resource. And determining, according to the feature information of the second user equipment, the second target resource from the resources for performing the D2D communication, or determining the mapping relationship between the feature information of the second user equipment and the second target resource. .
- the first target resource and the second target resource are different resources, but the specific types of the first target resource and the second target resource are not limited, that is, the first target
- the resource may be one or more of a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource
- the second target resource may be a resource that is different from the first target resource in the time domain resource, the frequency domain resource, the air domain resource, or the code domain resource.
- the processing unit 310 of the first user equipment determines to select the first configuration pattern according to the feature information of the first user equipment and/or the feature information of the second user equipment, and the processing unit 310 of the first user equipment is configured according to the first user equipment.
- the process of determining the second configuration pattern is similar to the process described in the methods a to f, and the description thereof is omitted here.
- the method for the second user equipment to determine the target resource may be the same as the method for the first user equipment to select the target resource. Therefore, in this case, the first user equipment needs to notify the second user equipment target.
- the resource is specifically determined according to the feature information of the first user equipment or the feature information of the second user equipment, to ensure that the second user equipment can accurately determine the target resource.
- the process of determining the target resource by the second user equipment according to the feature information is similar to the process of selecting the target resource by the second user equipment according to the feature information.
- the description is omitted.
- the processing unit 310 of the first user equipment may directly directly indicate the information of the target resource (for example, the sequence number of the symbol carrying the RS in the subframe). And sending to the second user equipment, so that the second user equipment can determine the target resource according to the information indicating the target resource.
- the target resource is selected by the second user equipment from the communication resource according to the feature information used when the target resource is selected, and
- the receiving unit 320 is further configured to receive, by the second user equipment, third information, where the third information is used to indicate feature information used by the second user equipment to select the target resource, and the processing unit 310 is further configured to use, according to the Three information, determine the target resource; or
- the receiving unit 320 is further configured to receive, by the second user equipment, fourth information, where the fourth information is used.
- the processing unit 310 is further configured to determine the target resource according to the fourth information.
- the target resource is only one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the target resource includes a time domain resource, a frequency domain resource, and an air domain resource.
- at least two of the code domain resources, and the at least two resources are determined according to the feature information of the same user equipment, and the second user equipment may be based on the feature information of the first user equipment or the second user equipment.
- the feature information selects a target resource from among resources for performing the D2D communication, or determines a mapping relationship between the feature information and the target resource.
- the second user equipment may be according to the first The feature information of the user equipment is selected from the resources for performing the D2D communication, or the mapping relationship between the feature information of the first user equipment and the first target resource is determined. And, the second target resource is selected from the resources for performing the D2D communication according to the feature information of the second user equipment, or the mapping relationship between the feature information of the second user equipment and the second target resource is determined. .
- the first target resource and the second target resource are different resources, but the specific types of the first target resource and the second target resource are not limited, that is, the first target
- the resource may be one or more of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the second target resource may be a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource and the first target resource. Different resources.
- the method and the process for selecting the target resource by the second user equipment are the same as the method and the process for selecting the target resource by the first user equipment.
- the description thereof is omitted.
- the method for the first user equipment to determine the target resource may be the same as the method for the second user equipment to select the target resource. Therefore, in this case, the second user equipment needs to notify the first user equipment target.
- the resource is specifically determined according to the feature information of the first user equipment or the feature information of the second user equipment, to ensure that the first user equipment can accurately determine the target resource.
- the process of determining, by the first user equipment, the target resource according to the feature information The process of selecting a target resource by a user equipment according to the feature information is similar. Here, in order to avoid redundancy, the description thereof is omitted.
- the second user equipment may directly send information indicating the target resource (for example, the sequence number of the symbol carrying the RS in the subframe) to the first A user equipment, whereby the first user equipment can determine the target resource according to the information indicating the target resource.
- the target resource for example, the sequence number of the symbol carrying the RS in the subframe
- the target resource is selected by the base station device according to the feature information used when the target resource is selected, and
- the receiving unit 320 is further configured to receive, by the base station device, fifth information, where the fifth information is used to indicate feature information used by the base station device to select the target resource, and the processing unit 310 is further configured to determine, according to the fifth information, The target resource; or
- the receiving unit 320 is further configured to receive, by the base station device, the sixth information, where the sixth information is used to indicate the target resource, and the processing unit 310 is further configured to determine the target resource according to the sixth information.
- the target resource when the target resource is only one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource, or the target resource includes a time domain resource, a frequency domain resource, and an air domain resource. Or at least two of the code domain resources, and the at least two resources are determined according to the feature information of the same user equipment, and the base station device may be based on the feature information of the first user equipment or the feature information of the second user equipment. And selecting, from the resources for performing the D2D communication, the target resource, or determining the mapping relationship between the feature information and the target resource.
- the base station device may be configured according to the first user equipment. And the feature information, the first target resource is selected from the resources for performing the D2D communication, or the mapping relationship between the feature information of the first user equipment and the first target resource is determined. And, according to the feature information of the second user equipment, from the D2D communication The second target resource is selected, or the mapping relationship between the feature information of the second user equipment and the second target resource is determined.
- the first target resource and the second target resource are different resources, but the specific types of the first target resource and the second target resource are not limited, that is, the first target
- the resource may be one or more of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the second target resource may be a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource and the first target resource. Different resources.
- the method and the process for the base station device to select the target resource are the same as the method and the process for the first user device to select the target resource.
- the description thereof is omitted.
- the method for the first user equipment to determine the target resource may be the same as the method for the base station device to select the target resource. Therefore, in this case, the base station device needs to notify the first user equipment that the target resource is specifically based on The feature information of the first user equipment is determined by the feature information of the second user equipment to ensure that the first user equipment can accurately determine the target resource.
- the process of determining the target resource by the first user equipment according to the feature information is similar to the process of selecting the target resource according to the feature information by the first user equipment.
- the description thereof is omitted.
- the base station device may directly send information indicating the target resource (for example, a sequence number of the symbol carrying the RS in the subframe) to the first user.
- the device and thus, the receiving unit 320 of the first user equipment may determine the target resource according to the information indicating the target resource.
- the apparatus for transmitting a reference signal by determining the target resource for carrying the reference signal according to the feature information of the user equipment performing the inter-device communication, dynamic configuration of the resource can be realized, thereby enabling the terminal to communicate even between the devices. In many cases, the transmission of reference signals between pairs of terminals can also be ensured.
- the apparatus 300 for transmitting a reference signal may correspond to a user equipment (first user equipment) in the method of the embodiment of the present invention, and the other operations of the units and modules in the apparatus 300 for transmitting the reference signal And/or functions respectively to achieve the corresponding method 100 in FIG. The process, for the sake of cleanliness, will not be repeated here.
- FIG. 6 shows a schematic block diagram of an apparatus 400 for transmitting reference signals in D2D communication between devices, in accordance with an embodiment of the present invention.
- the apparatus 400 includes:
- the acquiring unit 410 is configured to acquire feature information used when selecting a target resource, where the feature information used when selecting the target resource includes at least one of the following two items: feature information for uniquely identifying the first user equipment, and And characteristic information of the second user equipment that uniquely identifies the D2D communication with the first user equipment;
- the processing unit 420 is configured to select, according to the feature information used when selecting the target resource, the target resource for carrying the reference signal RS from the communication resources used for performing the D2D communication;
- the sending unit 430 is configured to send, to the at least one user equipment of the first user equipment and the second user equipment, fifth indication information, where the fifth information is used to indicate characteristic information used when the target resource is selected, to facilitate the at least Determining, by the user equipment, the target resource for carrying the RS according to the fifth information, or sending the sixth indication information to the at least one user equipment, where the sixth information is used to indicate the target resource, to facilitate the at least one user equipment. Based on the sixth information, the target resource for carrying the RS is determined.
- the acquiring unit 410 of the base station device may acquire feature information of the user equipment that performs D2D communication between devices.
- the feature information may be directly used to determine a target for carrying the RS.
- the resource hereinafter, referred to as the target resource
- the pattern number when the feature information is other expressions (for example, letters, etc.), the feature corresponding to the feature information may be determined by a preset algorithm (function, formula, etc.)
- the parameter (denoted as S), for example, can be determined by any of the above formulas 1 to 3.
- the mapping relationship between the feature information and the feature parameter may be linear or non-linear, and the present invention is not particularly limited.
- the feature parameter can be used to replace the feature information in the above process, and the calculation is performed.
- one feature parameter S may only uniquely correspond to one user equipment or a pair of user equipments.
- the feature parameter s is used as a basis for selecting (or determining) the target resource.
- the basis used in determining the target resource for the RS may be specified.
- the user equipment may be specified according to the originating end (or receiving end) of the D2D communication.
- Feature information (or determined feature parameters corresponding to the feature information) to determine the target resource (target resource) from a resource (including a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource) for performing D2D communication ).
- the user equipment may be configured to determine, according to the feature information of the originating end of the D2D communication, the first resource for carrying the reference signal from the resource for performing D2D communication, including the time domain resource, the frequency domain resource, the spatial domain resource, or the code domain resource.
- a resource such as a time domain resource
- a second resource of the reference signal such as a frequency domain resource.
- the target resource is only one of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource, or the target resource includes a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource.
- the processing unit 410 is specifically configured to Selecting the target resource by the feature information of the first user equipment and/or the feature information of the second user equipment
- the base station device may be based on the feature information of the first user equipment and/or the feature information of the second user equipment. And selecting, from the resources for performing the D2D communication, the target resource, or determining the mapping relationship between the feature information and the target resource.
- SC-FDM A Single Carrier
- all subcarriers (frequency domain resources) on one symbol can only carry reference signals or data in order to maintain single carrier characteristics.
- the reference signal needs to occupy at least one symbol and cannot be refined to the resource element (RE, Resource Element) level. Therefore, in this case, the selection of the frequency domain resource may be disregarded.
- it may be designed as a target resource with only one symbol in one subframe.
- all demodulation is based on extrapolation, or Interpolation can also be considered when adjacent subframes have RSs that can be borrowed.
- it can be designed as a target resource with two symbols in one subframe, as shown in Figure 2c.
- the RS may be transmitted with more than two symbols, and the present invention is not particularly limited. In the embodiment of the present invention, whether there is one symbol, two symbols, or more symbols, the RS (the time domain resource, the frequency domain resource, the airspace resource, and the code domain resource) are not fixed, and the user is not fixed.
- the device or the base station may select a resource for carrying the RS from the D2D target resource according to the feature information of the user equipment. E.g:
- the processing unit 420 is specifically configured to select a target configuration pattern from the preset at least two configuration patterns according to the feature information used when selecting the target resource, where each The configuration pattern is used to indicate the RS resource used to carry the RS in the communication resource;
- An RS resource for indicating a pattern according to the target configuration as the target resource
- the sixth information is used to indicate the target configuration pattern.
- a plurality of (for example, eight) configuration patterns may be set in advance, the configuration patterns indicating one subframe (a resource for performing D2D communication) for carrying an RS (for example, a demodulation reference signal (RS) , Demodulation Reference Signal ) )
- RS demodulation reference signal
- Figure 2a shows a pattern
- Figure 2b shows another pattern
- Figure 2c shows another pattern.
- the base station device may determine, according to the feature information of the user equipment (the feature information of the first user equipment, or the feature information of the second user, or the feature information of the first user equipment and the feature information of the second user), the D2D communication is used. Pattem.
- a number may be determined by modulating the total number of preset patterns on the preset pattern (for example, may be represented by 3 bits), and the number may be used to indicate that the pattern used in the D2D communication is preset.
- the number in the pattern for example, 8
- the feature information when the feature information is a numerical value, the feature information may be directly used to determine a target resource (eg, a pattern number), and when the feature information is another expression (eg, a letter, etc.), the preset information may also be preset.
- An algorithm determines a feature parameter (referred to as S) corresponding to the feature information, and for example, the feature parameter S can be determined by any of the above formulas 1 to 3.
- the mapping relationship between the feature information and the feature parameter may be linear or non-linear, and the present invention is not particularly limited. Therefore, the feature parameter can be used instead of the feature information in the above process to perform calculation.
- one feature parameter S may only uniquely correspond to one user equipment or a pair of user equipments.
- the processing unit 420 is specifically configured to determine, according to the feature information used when selecting the target resource, an offset value, where the offset value is used to indicate that the target resource is preset. Configuring an offset of the RS resource relative to the preset RS resource in the configuration, where the configuration pattern is used to indicate the RS resource used to carry the RS in the communication resource;
- the sixth information is used to indicate the offset value.
- a default pattern can be specified.
- the feature is The value of the number S exceeds the number of symbols in the sub-frame, and the value of the feature parameter S is modulo the number of symbols in the sub-frame.
- the processing unit 420 is specifically configured to determine, according to the feature information used when selecting the target resource, the configuration value, where the configuration value is used to indicate that the target resource is in the communication resource. s position;
- the sixth information is used to indicate the configuration value.
- one or more symbols in the time domain resource may be indicated by the feature parameter S, for example, the feature number S is used to indicate the sequence number of the symbol in all symbols, so that the symbol can be determined and the symbol is Host RS on it. And, if the value of the feature parameter S exceeds the number of symbols, the value of the feature parameter S is modulo the number of symbols, and the number of the symbol in all symbols is determined according to the modulus value.
- the uplink adopts multiple access mode of orthogonal frequency division multiple access OFDMA
- OFDMA orthogonal frequency division multiple access
- two ports airspace resources
- OCC orthogonal masks
- the sequences between different cells are orthogonal.
- CS Cyclic Shift
- the user equipment or the base station may select a resource for carrying the RS from the D2D target resources according to the feature information (or characteristic parameter) of the user equipment.
- the user equipment or the base station may select a resource for carrying the RS from the D2D target resource according to the feature information (or the feature parameter) of the user equipment, for example: j.
- a plurality of patterns may be preset, the pattern indicating a symbol (an example of a first target resource) and/or a subcarrier (an example of a second target resource) carrying an RS in one subframe, and FIG. 3b is a pattern, FIG. 3c is a pattern.
- the pattern used is determined according to the characteristic parameter S.
- the pattern used may be determined by modulo the total number of patterns of the feature parameter S to the pattern, and if the symbols for carrying the RS (an example of the target resource) are plural, the relative of the plurality of symbols resources may not be fixed, i.e., different symbols may be selected depending on each characteristic parameter S (e.g., according to a symbol selection Si, S 2 in accordance with another symbol selection).
- k You can select a pattern as the default pattern (for example, as shown in Figure 3a, Figure 3b, or Figure 3c), with the parameter S as the corresponding time domain displacement/frequency domain displacement/space displacement/code domain shift (shift)
- the value of the parameter S exceeds the number of symbols in the sub-frame, the value of the parameter S is modulo the number of symbols in the sub-frame.
- the parameter S can also be used to indicate subcarrier (frequency domain resource), antenna port (space resource), RS sequence, OCC or CS.
- One or more symbols in the time domain resource can be indicated by the feature parameter S, for example, the sequence number of the symbol in all symbols, and the RS is carried on the symbol. And, if the value of the feature parameter S exceeds the number of symbols, the value of the feature parameter S is modulo the number of symbols, and the number of the symbol in all symbols is determined according to the modulus value.
- the parameter S can also be used to indicate subcarrier (frequency domain resource), antenna port (space resource), RS sequence, OCC or CS.
- the apparatus for transmitting a reference signal can effectively reduce the overhead of the reference signal.
- the relative positions of the plurality of resources may be fixed, that is, the same displacement (for example, time domain shift) may be calculated according to the same feature information.
- the relative positions of the multiple resources may not be fixed, that is, different time domain shifts may be obtained according to different feature parameters S, and different resources are selected (for example, one symbol is selected according to Si, and another symbol is selected according to S 2 ).
- the target resource includes at least two of a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource, and
- the processing unit 420 is specifically configured to select the first target resource according to the feature information of the first user equipment and/or the feature information of the second user equipment;
- the target resource when the target resource includes at least two of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource, the at least two resources are respectively determined according to feature information of different user equipments.
- the base station device may select, according to the feature information of the first user equipment, the first target resource from the resources used for performing the D2D communication, or determine the feature information of the first user equipment and the first target resource. Mapping relations.
- the second target resource is selected from the resources for performing the D2D communication according to the feature information of the second user equipment, or the mapping relationship between the feature information of the second user equipment and the second target resource is determined. .
- the first target resource and the second target resource are different resources, but the specific types of the first target resource and the second target resource are not limited, that is, the first target
- the resource may be one or more of a time domain resource, a frequency domain resource, a spatial domain resource, or a code domain resource
- the second target resource may be a time domain resource, a frequency domain resource, an air domain resource, or a code domain resource and the first target resource. Different resources.
- the base station device determines, according to the feature information of the first user equipment and/or the feature information of the second user equipment, the first configuration pattern to be selected, and the base station device according to the feature information of the first user equipment and/or the characteristics of the second user equipment.
- the process of determining the selection of the second configuration pattern is similar to the process in the methods g to 1, and the description thereof is omitted here to avoid redundancy.
- the method for the user equipment to determine the target resource may be the same as the method for the base station device to select the target resource. Therefore, in this case, the base station device needs to notify the user that the target resource is specifically according to the first user equipment.
- the feature information is determined by the feature information of the second user equipment to ensure that the user equipment can accurately determine the target resource.
- the process of the user equipment determining the target resource according to the feature information is similar to the process of the base station device selecting the target resource according to the feature information.
- the description thereof is omitted.
- the base station device may directly send the information indicating the target resource (for example, the sequence number of the symbol carrying the RS in the subframe) to the user equipment.
- the user equipment can determine the target resource according to the information indicating the target resource.
- the apparatus for transmitting a reference signal by determining the target resource for carrying the reference signal according to the feature information of the user equipment performing the inter-device communication, dynamic configuration of the resource can be realized, thereby enabling the terminal to communicate even between the devices. In many cases, the transmission of reference signals between pairs of terminals can also be ensured.
- the apparatus 400 for transmitting a reference signal may correspond to a base station apparatus in the method of the embodiment of the present invention, and the other operations and/or functions of the units and modules in the apparatus 400 for transmitting the reference signal are respectively
- the corresponding process of the method 200 in FIG. 4 is implemented, and the details are not described herein.
- the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
- the implementation process constitutes any limitation.
- the disclosed systems, devices, and methods may be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
- the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
- the units described as separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
- the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
- a number of instructions are used to make a computer device (which may be a personal computer, a server, or a network device including: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM, a random access memory). ), a variety of media such as a disk or an optical disk that can store program code.
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Abstract
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112015004820-0A BR112015004820B1 (pt) | 2012-09-06 | 2013-09-06 | Método e aparelho para transmissão de sinal de referência em comunicação de dispositivo para dispositivo d2d |
EP13834509.5A EP2887730B1 (en) | 2012-09-06 | 2013-09-06 | Method and apparatus for transmitting reference signal in device-to-device (d2d) communications |
MYPI2015000554A MY190248A (en) | 2012-09-06 | 2013-09-06 | Method and apparatus for transmitting reference signal in device-to-device d2d communication and computer readable storage medium |
EP21153682.6A EP3883166B1 (en) | 2012-09-06 | 2013-09-06 | Method and apparatus for transmitting reference signal in device-to-device d2d communication |
US14/639,619 US10630439B2 (en) | 2012-09-06 | 2015-03-05 | Method and apparatus for transmitting reference signal in device-to-device (D2D) communication |
US16/833,880 US11451354B2 (en) | 2012-09-06 | 2020-03-30 | Method and apparatus for transmitting reference signal in device-to-device (D2D) communication |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201210327486.0A CN103686861B (zh) | 2012-09-06 | 2012-09-06 | 设备间d2d通信中传输参考信号的方法和装置 |
CN201210327486.0 | 2012-09-06 |
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EP3883166B1 (en) | 2022-11-02 |
MY190248A (en) | 2022-04-08 |
US20150180631A1 (en) | 2015-06-25 |
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CN103686861A (zh) | 2014-03-26 |
EP3883166A1 (en) | 2021-09-22 |
EP2887730A1 (en) | 2015-06-24 |
BR112015004820A8 (pt) | 2018-06-12 |
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US10630439B2 (en) | 2020-04-21 |
US11451354B2 (en) | 2022-09-20 |
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