WO2016008101A1 - 发送参考信号的装置及方法 - Google Patents
发送参考信号的装置及方法 Download PDFInfo
- Publication number
- WO2016008101A1 WO2016008101A1 PCT/CN2014/082258 CN2014082258W WO2016008101A1 WO 2016008101 A1 WO2016008101 A1 WO 2016008101A1 CN 2014082258 W CN2014082258 W CN 2014082258W WO 2016008101 A1 WO2016008101 A1 WO 2016008101A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reference signal
- transmitting
- bandwidth information
- cell
- antenna port
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Definitions
- the present invention relates to communication technologies, and in particular, to an apparatus and method for transmitting a reference signal. Background technique
- the user equipment In the Long Term Evolution (LTE) network, the user equipment (User Equipment, UE for short) needs to determine whether there are other cells in the vicinity of the cell that is being connected before performing the handover operation. What is the signal quality of these cells? If the signal quality of other cells is better than the cell that is being connected, or meets other handover conditions, the network will initiate a handover procedure to switch the UE to a more suitable cell. This requires the UE to perform "cell discovery and measurement" on the surrounding cells. This measurement is also called Radio Resource Management (RRM) measurement in LTE. In the prior art, the RRM measurement of the UE is mainly performed by detecting a Cell-specific Reference Signal (CRS) sent by the base station.
- CRS Cell-specific Reference Signal
- the system bandwidth is divided into a plurality of physical resource blocks (Physical Resource Blocks, referred to as PRBs). For example, one system bandwidth is divided into 50 PRBs. Each PRB can continue to be divided into smaller resource units (Resource Element, referred to as RE). A signal can be transmitted on each RE.
- PRBs Physical Resource Blocks
- RE resource Element
- each cell transmitting a CRS uses a frequency offset to avoid mutual interference caused by collisions of neighboring cells.
- the frequency offset refers to the position where the CRS is transmitted moves ⁇ RE in frequency.
- the existing RRM measurement mechanism will have new problems: If the frequency offset of the two cells is exactly the same (for example, the id of cell 1 is 3 and the id of cell 2 is 9, the frequency offset is Both are 3), then the CRS will collide, causing more serious interference. Due to the dense deployment of base stations, the probability of such collisions is greatly increased, resulting in a decrease in RRM measurement accuracy. Summary of the invention
- Embodiments of the present invention provide an apparatus and method for transmitting a reference signal for improving RRM measurement accuracy.
- a first aspect of the present invention provides an apparatus for transmitting a reference signal, including:
- a processing module configured to determine, according to the cell identifier, a frequency offset and at least one antenna port for transmitting the reference signal; determining, according to the frequency offset and the at least one antenna port for transmitting the reference signal, a sending location of the resource unit RE, where The sending location of the RE includes a time domain sending location of the RE and a frequency domain sending location of the RE;
- a sending module configured to send the reference signal according to a sending position of the RE.
- the processing module is further configured to acquire the reference before determining a frequency offset according to the cell identifier and at least one antenna port for transmitting the reference signal At least one of a transmission period and a bandwidth information of the signal; wherein the bandwidth information of the reference signal is used to indicate a frequency domain transmission location of the RE.
- the processing module is configured to obtain at least one of a sending period and a bandwidth information of the reference signal, including:
- the processing module is configured to acquire at least one of a sending period and a bandwidth information of the reference signal according to a notification message sent from the network control device; or
- the processing module is specifically configured to: if the sending period of the reference signal is a preset fixed period, Generating the bandwidth information of the reference signal by the cell signal quality reported by the UE; or
- the processing module is specifically configured to: if the bandwidth information of the reference signal is preset fixed bandwidth information, generate a transmission period of the reference signal according to the cell signal quality reported by the UE; or
- the processing module is specifically configured to generate, according to the cell signal quality reported by the UE, a transmission period and bandwidth information of the reference signal.
- the sending module is specifically configured to send the reference signal at a sending position of the corresponding RE according to a sending period and a bandwidth information of the reference signal in a sending period of each of the reference signals.
- the method further includes:
- the RE for transmitting the reference signal is only included on an orthogonal frequency division multiplexing OFDM symbol corresponding to a transmission period of the reference signal and bandwidth information.
- the processing module is further configured to obtain, according to the cell identifier, the cell identifier in the relationship table. Corresponding said frequency offset and at least one of said antenna ports;
- the relationship table includes a correspondence between the cell identifier and the frequency offset, and a correspondence between the cell identifier and at least one of the antenna ports.
- the processing module is specifically configured to determine, according to the following formula, at least one used for sending a reference signal. mouth: The p is an identifier of the antenna port, and the N is the cell identifier.
- the processing module is specifically configured to determine at least the following formula An antenna port for sending reference signals: The P is an identifier of the antenna port, where N is the cell identifier, and the N is a positive integer.
- the processing module is specifically configured to require at least two The antenna port for transmitting the reference signal determines the identifier of the other antenna port according to the identifier of the antenna port after determining the identifier of one of the antenna ports.
- a second aspect of the present invention provides an apparatus for transmitting a reference signal, including: a processor, configured to determine, according to the cell identifier, a frequency offset and at least one antenna port for transmitting the reference signal; determining, according to the frequency offset and the at least one antenna port for transmitting the reference signal, a sending location of the resource unit RE, where The sending location of the RE includes a time domain sending location of the RE and a frequency domain sending location of the RE;
- a transmitter configured to send the reference signal according to a sending position of the RE.
- the processor is further configured to acquire the reference before determining a frequency offset according to the cell identifier and at least one antenna port for transmitting the reference signal At least one of a transmission period and a bandwidth information of the signal, where the bandwidth information of the reference signal is used to indicate a frequency domain transmission location of the RE.
- the acquiring, by the processor, the at least one of the sending period and the bandwidth information of the reference signal includes:
- the processor is specifically configured to acquire at least one of a sending period and a bandwidth information of the reference signal according to a notification message sent from the network control device; or
- the processor is specifically configured to: if the sending period of the reference signal is a preset fixed period, Generating, according to the cell signal quality reported by the UE, bandwidth information of the reference signal; or, the processor is specifically configured to: if the bandwidth information of the reference signal is preset fixed bandwidth information, according to the cell reported by the UE Signal quality generates a transmission period of the reference signal; or
- the processor is specifically configured to generate a transmission period and bandwidth information of the reference signal according to the cell signal quality reported by the UE.
- the transmitter is specifically configured to: according to a sending period and bandwidth information of the reference signal, The reference signal is transmitted during the transmission period of the corresponding RE.
- the method further includes: The RE for transmitting the reference signal is only included on an orthogonal frequency division multiplexing OFDM symbol corresponding to a transmission period of the reference signal and bandwidth information.
- the processor is further configured to obtain, in the relationship table, the cell identifier according to the cell identifier. Corresponding said frequency offset and at least one of said antenna ports;
- the relationship table includes a correspondence between the cell identifier and the frequency offset, and a correspondence between the cell identifier and at least one of the antenna ports.
- the processor is specifically configured to determine, according to the following formula, at least one used for sending a reference signal Tiankou: The P is an identifier of the antenna port, and the N is the cell identifier.
- the processor is specifically configured to determine, according to the following formula, at least One for the sender: The P is an identifier of the antenna port, where N is the cell identifier, and the N is a positive integer.
- the processor is specifically configured to require at least two The antenna port for transmitting the reference signal determines the identifier of the other antenna port according to the identifier of the antenna port after determining the identifier of one of the antenna ports.
- a third aspect of the present invention provides a method of transmitting a reference signal, including:
- the method before the determining, by the cell identifier, the frequency offset and the at least one antenna port for sending the reference signal, the method further includes: acquiring, sending, At least one of the period and the bandwidth information; wherein the bandwidth information of the reference signal is used to indicate a frequency domain transmission location of the RE.
- the generating at least one of a sending period and a bandwidth information of the reference signal includes: if The transmission period is a preset fixed period, and the bandwidth information of the reference signal is generated according to the cell signal quality reported by the UE; or
- the bandwidth information of the reference signal is the preset fixed bandwidth information, generating a sending period of the reference signal according to the cell signal quality reported by the UE;
- the transmitting, by the at least one of the antenna ports, the reference signal in the RE, the The antenna port sends the reference signal including:
- the method further includes:
- the RE for transmitting the reference signal is only included on an orthogonal frequency division multiplexing OFDM symbol corresponding to a transmission period of the reference signal and bandwidth information.
- the determining, by the cell identifier, the frequency offset and the at least one No. of antenna ports including:
- the relationship table includes a correspondence between the cell identifier and the frequency offset, and a correspondence between the cell identifier and at least one of the antenna ports.
- the determining, by the cell identifier, the frequency offset and the at least one antenna for transmitting the reference signal a port, wherein, at least one antenna port for transmitting a reference signal is determined according to the following formula:
- the p is an identifier of the antenna port
- the N is the cell identifier.
- the determining, by the cell identifier, a frequency offset and at least An antenna port for transmitting a reference signal wherein at least one of the reference signal ports is determined according to the following formula:
- the P is an identifier of the antenna port, where N is the cell identifier, and the N is a positive integer.
- the method further includes: if at least two are needed for sending the reference signal After determining the identifier of one of the antenna ports, the identifier of the other antenna port is determined according to the identifier of the antenna port.
- the apparatus and method for transmitting a reference signal determines a frequency offset and at least one antenna port for transmitting a reference signal according to a cell identifier; and according to the frequency offset and at least one for sending
- the antenna port of the reference signal determines a transmission location of the RE, the transmission location of the RE includes a time domain transmission location of the RE and a frequency domain transmission location of the RE, and the apparatus for transmitting the reference signal transmits the location according to the transmission location of the RE Deriving the reference signal, based on determining the frequency offset according to the cell identifier, and then determining according to the cell identifier Determining at least one antenna port for transmitting the reference signal, so that the neighboring cells use the antenna port corresponding to the cell identifier of the respective cell to transmit the reference signal of the respective cell on the basis of using the frequency offset to transmit the reference signal, thereby avoiding the neighboring cell.
- FIG. 2 is a schematic diagram of a cell frequency offset
- FIG. 3 is a schematic structural diagram of an apparatus for transmitting a reference signal according to an embodiment of the present invention
- FIG. 4 is a schematic diagram of a cell sending a reference signal according to an embodiment of the present invention
- FIG. Signal transmission diagram ;
- FIG. 6 is a schematic diagram of comparison of RE mapping according to an embodiment of the present invention.
- FIG. 7 is a schematic structural diagram of another apparatus for transmitting a reference signal according to an embodiment of the present disclosure.
- FIG. 8 is a schematic flowchart of a method for transmitting a reference signal according to an embodiment of the present invention
- FIG. 9 is a schematic flowchart of another method for transmitting a reference signal according to an embodiment of the present invention.
- the radio resource management (RRM) measurement of the user equipment (User Equipment, UE for short) in the prior art is mainly performed by detecting the base station. Send the CRS to complete. We describe the structure of the CRS in detail below.
- each cell transmits a signal on a certain frequency band.
- the bandwidth of the band is called the system bandwidth.
- the system bandwidth is divided into a number of physical resource blocks (Physical Resource Blocks, PRBs).
- PRBs Physical Resource Blocks
- Each resource block has a frequency domain width of 180 kHz and a duration of lms.
- Figure 1 is a schematic diagram of a prior art CRS transmission. As shown on the leftmost side of Figure 1, a system bandwidth is divided into 50 PRBs. Each PRB can continue to be divided into smaller resource units (Resource Element, RE: for short). A signal can be transmitted on each RE. In the middle of Figure 1, a detailed view of a PRB is shown. Each small square in Figure 1 represents a RE.
- a PRB consists of many REs.
- the blocks filled with different line segments are REs that can be used to transmit CRS in the LTE protocol, while the remaining REs are used to transmit data or other reference signals.
- CRS is transmitted over full bandwidth. That is to say, all PRBs will have CRS sent.
- the CRS is also divided into four antenna ports (Antenna Port, referred to as AP), which are called AP0, API, AP2, and AP3.
- AP0 Antenna Port
- the base station uses the transmission of the 1 antenna port; only the CRS AP0 is sent; if the base station uses the transmission of the 2 antenna port, the CRS AP0 mountain is sent. If the base station uses the transmission of the 4 antenna port, the CRS AP 0, 1, 2, 3 is transmitted.
- FIG. 2 is a schematic diagram of cell frequency offset. Referring to Figure 2, there are two neighboring cells, and the cell ids are 6 and 8, respectively. It is assumed that the two cells respectively use CRS AP0 for CRS transmission.
- the UE learns the id of the surrounding cell, and then calculates the CRS frequency offset of the cell according to the cell id, and then receives the CRS to the corresponding RE, and performs measurement. Obviously, the measurement needs to reach a certain accuracy. If the measurement is not accurate, the RRM measurement result reported by the UE will be inaccurate, causing the base station to do The wrong decision. The main factor affecting the measurement accuracy is the level of interference. If the interference is too large, the measurement accuracy will be affected.
- Embodiments of the present invention provide an apparatus and method for transmitting a reference signal to solve the problem of reduced accuracy of RRM measurement.
- FIG. 3 is a schematic structural diagram of an apparatus for transmitting a reference signal according to an embodiment of the present invention, where the apparatus for transmitting a reference signal can be set as a separate device in a base station, a relay node, a repeater, and a D2D ( Device to Device Communication, etc., may also be integrated in the above device.
- the base of the execution base is taken as an example.
- the device includes: a processing module 10 and a sending module 11.
- the processing module 10 is configured to determine a frequency offset and at least one antenna port for transmitting a reference signal according to the cell identifier, and determine a sending position of the RE according to the frequency offset and the at least one antenna port for transmitting the reference signal,
- the transmission location of the RE includes the time domain transmission location of the RE and the frequency domain transmission location of the RE.
- the reference signal may be a CRS or a Discovery Reference Signal (DRS).
- DRS Discovery Reference Signal
- the specific form of the reference signal is not limited herein.
- the cell identifier may be a physical identifier of the cell or a virtual identifier of the cell.
- the base station of each cell determines the frequency offset of the cell according to the respective cell identity, and at least one antenna port for transmitting the reference signal.
- the frequency domain transmission position of the RE may be adjusted according to the frequency offset, so that the reference signals of different cells are in the frequency domain sending position of the corresponding RE. Differentiate, determine at least one for sending according to the cell identity
- the time domain transmission positions of the REs corresponding to different antenna ports are different, so that the reference signals of different cells are located in the time domain of the corresponding RE.
- different antenna ports can be set to use different frequency domain transmission positions of the RE, thereby better distinguishing different cells, thereby improving anti-interference ability.
- the sending module 11 is configured to send the reference signal according to the sending position of the RE.
- the apparatus for transmitting a reference signal provided by the embodiment, the processing module determines, according to the cell identifier, a frequency offset and at least one antenna port for transmitting the reference signal; and according to the frequency offset and the at least one antenna port for transmitting the reference signal Determining a transmission location of the RE, where the transmission location of the RE includes a time domain transmission location of the RE and a frequency domain transmission location of the RE, and the sending module sends the reference signal according to the sending location of the RE,
- the cell identifier determines the frequency offset, and then determines at least one antenna port for transmitting the reference signal according to the cell identifier, so that the neighboring cell uses the cell identifier of the corresponding cell on the basis of using the frequency offset to transmit the reference signal.
- the antenna ports transmit reference signals of respective cells, thereby avoiding interference caused by collision of reference signals of adjacent cells, thereby improving RRM measurement accuracy.
- the processing module 10 is further configured to: acquire at least one of a transmission period and bandwidth information of the reference signal before determining a frequency offset according to the cell identifier and at least one antenna port for transmitting the reference signal;
- the bandwidth information of the reference signal is used to indicate a frequency domain transmission location of the RE.
- the processing module 10 acquires at least one of a transmission period and bandwidth information of the reference signal, which can be implemented as follows:
- the processing module 10 is configured to: acquire, according to the notification message sent by the network control device, at least one of a sending period and a bandwidth information of the reference signal; or, manner 2: according to the cell reported by the user equipment UE Signal quality, generating at least one of a transmission period and bandwidth information of the reference signal.
- the processing module 10 generates a scenario in which at least one of the transmission period and the bandwidth information of the reference signal is generated according to the cell signal quality reported by the user equipment UE, and the processing module 10 can be implemented in any one of the following manners:
- the processing module 10 is specifically configured to: if the sending period of the reference signal is a preset fixed period, generate the reference signal according to the cell signal quality reported by the UE Bandwidth information.
- the processing module 10 may perform the selected matching bandwidth in several optional bandwidth information according to the cell signal quality.
- the protocol specifies that the reference signal period is 40 ms, and the bandwidth can be one of 5 MHz/10 MHz/20 MHz, which can be selected according to the specific situation. It should be noted that the worse the cell signal quality is, the larger the bandwidth information is selected.
- the processing module 10 is specifically configured to: if the bandwidth information of the reference signal is preset fixed bandwidth information, generate a transmission period of the reference signal according to the cell signal quality reported by the UE.
- a possible implementation manner is: if the bandwidth information of the reference signal is a preset value, at this time, the processing module 10 may perform the selective matching transmission in several optional transmission periods according to the cell signal quality. cycle.
- the protocol specifies that the bandwidth of the reference signal is full bandwidth (all bandwidths are transmitted), and the transmission period is one of 40ms/80ms/100ms, which can be selected according to the specific situation. It should be noted that the worse the cell signal quality is, the smaller the transmission period is selected.
- the processing module 10 is specifically configured to generate, according to the cell signal quality reported by the UE, a transmission period and bandwidth information of the reference signal.
- the protocol specifies several optional bandwidth information of the reference signal, and provides several optional transmission periods.
- the processing module 10 may select a transmission period according to the cell signal quality. Bandwidth information.
- the bandwidth information and the transmission period of the reference signal may also be fixed values.
- the processing module 10 does not need to generate bandwidth information and/or a transmission period, but obtains a preset bandwidth from the storage medium of the device. Information and sending cycle.
- the sending module 11 is specifically configured to send the reference signal in a sending position of the corresponding RE according to a sending period and a bandwidth information of the reference signal in a sending period of each of the reference signals.
- the transmission period of the reference signal is The Orthogonal Frequency Division Multiplexing (abbreviation: OFDM) symbol corresponding to the bandwidth information includes only the RE for transmitting the reference signal.
- OFDM Orthogonal Frequency Division Multiplexing
- the bandwidth of the reference signal transmission is six PRBs with the system bandwidth in the middle.
- Such three neighboring cells transmit a reference signal every 40 ms and send 6 PRBs in the middle of the system bandwidth.
- the UE After notifying the UE of the above information, the UE performs RRM measurement only in the middle 6 PRBs.
- the OFDM symbol corresponding to the bandwidth information on the six PRBs only includes the RE for transmitting the reference signal, and does not transmit other data or signals, but may be included on other OFDM symbols on the six PRBs. It may also not contain other data or reference signals. Thereby, interference with reference signals of other cell base stations is avoided due to scheduling other data.
- the processing module 10 is further configured to: obtain, according to the cell identifier, the frequency offset corresponding to the cell identifier and at least one of the antenna ports in a relationship table;
- the relationship table includes a correspondence between the cell identifier and the frequency offset, and a correspondence between the cell identifier and at least one of the antenna ports.
- the processing module 10 is specifically configured to obtain a correspondence between the cell identifier and the frequency offset according to the following formula (1): Further, the processing module 10 is specifically configured according to the following Equation (2) determines at least one antenna port for transmitting the reference signal: The p is an identifier of the antenna port, and the N is the cell identifier. Further, the processing module 10 is specifically configured to determine at least one antenna port for transmitting a reference signal according to the following formula (3): The P is an identifier of the antenna port, where N is the cell identifier, and the N is a positive integer.
- processing module 10 may obtain the result in advance through the above formulas (1), (2), (3), and preset the result in the above relationship table; or, the processing module 10 each time The cell identifier is obtained, and is calculated according to the above formulas (1), (2), and (3).
- FIG. 5 is a schematic diagram of reference signal transmission according to an embodiment of the present invention.
- the frequency shift calculated according to formula 1) is the same.
- the REs of the reference signals transmitted by two adjacent cells according to the prior art may collide, resulting in a decrease in measurement accuracy.
- cell id 0 is transmitted using AP0
- cell id 6 is transmitted by using AP2.
- the reference signals transmitted by the neighboring cells no longer collide.
- the RE of the antenna port of the reference signal may have a one-to-one correspondence with the RE of the antenna port of the CRS in the prior art, or may be a one-to-many correspondence.
- the one-to-one correspondence relationship refers to: an antenna port of a reference signal in this embodiment
- RE is the RE corresponding to the antenna port of a CRS.
- the reference signal AP0 corresponds to CRS AP0; the reference signal API corresponds to CRS AP1; the reference signal AP2 corresponds to CRS AP2; and the reference signal AP3 corresponds to CRS AP3.
- the one-to-many correspondence refers to:
- the RE of the antenna port of one reference signal in this embodiment may correspond to the RE corresponding to the antenna ports of the multiple CRSs.
- the reference signal AP0 corresponds to CRS AP0
- the reference signal API corresponds to the CRS API
- the reference signal AP2 corresponds to AP2 and AP3 (-to-multiple) of the CRS.
- the advantage is that if there is a one-to-one correspondence, the reference signal AP2 corresponds to the CRS AP2.
- the number of REs of the CRS AP2 in one PRB is four, which is less than the reference signals AP0 and AP1.
- the reference signal AP2 includes the REs of CRS AP2 and AP3, so that a PR is included in the PRB, achieving the same density as the AP0 and API, thereby improving the RRM measurement accuracy.
- the apparatus can select multiple antenna ports for transmission of reference signals. Specifically, at most n antenna ports can be selected, where n N .
- the processing module 10 is specifically configured to: if at least two antenna ports for transmitting the reference signal are needed, after determining the identifier of one of the antenna ports, determine other antenna ports according to the identifier of the antenna port. logo.
- the identity of the other antenna port can be obtained by the following formula (4):
- formula (4) after the base station obtains the identifier of one antenna port, the identifiers of other antenna ports can be obtained by adding "1" to the known antenna port identifier.
- the number of REs of AP2 and AP3 in the prior art is increased to 8.
- FIG. 6 is a schematic diagram of a comparison of RE mappings according to an embodiment of the present invention, where the left side is a RE mapping diagram of four APs of the CRS in the prior art. It can be seen that AP0 and API occupy 8 REs in one PRB, while AP2 and AP3 occupy 4 REs. Since the number of REs is halved, the accuracy of RRM measurement based on AP2 and AP3 is inferior to that based on AP0 and API.
- the right side is the RE map of the four APs used to transmit the reference signal according to the embodiment of the present invention.
- the REs occupied by AP2 and AP3 are changed to eight, which ensures the same RE density, thereby improving the RRM measurement. Precision.
- FIG. 7 is a schematic structural diagram of another apparatus for transmitting a reference signal according to an embodiment of the present disclosure, which is applicable to implementing one or more embodiments of the components and methods disclosed in this text.
- the network component 200 can include a processor 2002 (which can be referred to as a central processing unit or CPU) that communicates with a storage device that includes: secondary storage 2004, read only memory (ROM) 2006, random access A memory (RAM) 2008, an input/output (I/O) device 2000, and a network connection device 2010 are taken.
- the processor 2002 can be implemented as one or more CPU chips, or can be one or more dedicated integrated circuits Part of the application specific integrated circuit (ASIC).
- the network component 200 can be applied to a base station, a relay, a repeater, a D2D (Device to Device Communication) device, and the like.
- D2D Device to Device Communication
- the secondary storage 2004 is typically comprised of one or more disk drives or tape drives for non-volatile storage of data, and if the capacity of the RAM 2008 is insufficient to store all of the operational data, the secondary storage is used as Overflow data storage device.
- the secondary storage 2004 can be used to store programs that are loaded into the RAM 2008 when selected for execution.
- the ROM 2006 is used to store instructions that are read during program execution and possibly also data.
- ROM 2006 is a non-volatile storage device whose storage capacity is typically small relative to the larger storage capacity of secondary storage 2004.
- the RAM 2008 is used to store volatile data and may also be used to store instructions. Access to both ROM 2006 and RAM 2008 is typically faster than access to secondary storage 2004.
- the processor 2002 is configured to determine a frequency offset and at least one antenna port for transmitting a reference signal according to the cell identifier, and determine a sending position of the RE according to the frequency offset and the at least one antenna port for transmitting the reference signal, where
- the transmission location of the RE includes the time domain transmission location of the RE and the frequency domain transmission location of the RE.
- the transmitter 2012 is configured to send the reference signal according to a sending position of the RE.
- the apparatus for transmitting a reference signal determines, according to the cell identifier, a frequency offset and at least one antenna port for transmitting the reference signal; and according to the frequency offset and the at least one antenna port for transmitting the reference signal Determining a transmission location of the RE, where the transmission location of the RE includes a time domain transmission location of the RE and a frequency domain transmission location of the RE, determining a frequency offset according to the cell identity, and at least one antenna port for transmitting a discovery reference signal And performing frequency offset processing on the frequency domain location of the resource unit RE for carrying the reference signal according to the frequency offset, and the transmitter sends the reference signal according to the sending position of the RE through at least one
- the antenna port sends the reference signal in the RE, and the antenna port is determined according to the cell identifier, and at least one antenna port for transmitting the reference signal is determined according to the cell identifier, so that the neighboring cell is used.
- the antenna end corresponding to the cell identifier of the respective cell is used.
- the processor 2002 is further configured to: acquire at least one of a transmission period and bandwidth information of the reference signal before determining a frequency offset according to the cell identifier and at least one antenna port for transmitting the reference signal;
- the bandwidth information of the reference signal is used to indicate a frequency domain transmission location of the RE.
- the processor 2002 is configured to obtain at least one of a transmission period and bandwidth information of the reference signal, and may be implemented as follows:
- the processor 2002 is specifically configured to acquire at least one of a sending period and a bandwidth information of the reference signal according to a notification message sent from the network control device.
- Manner 2 Generate at least one of a transmission period and bandwidth information of the reference signal according to a cell signal quality reported by the user equipment UE.
- the notification message sent by the network control device and the cell signal quality reported by the UE may be received by the network connection device 2010.
- the network connection device 2010 may include multiple interfaces, for example, receiving the UE through the LTE-UU interface. Report the cell signal quality.
- the base station can negotiate the configuration of the reference signal period and bandwidth through the LTE-X2 interface.
- it may also be a network control device, for example, the MME directly notifies the base station of the period and bandwidth of the reference signal.
- the processor 2002 is configured to: if the sending period of the reference signal is a preset fixed period, generate bandwidth information of the reference signal according to the cell signal quality reported by the UE; or
- the processor 2002 is configured to: if the bandwidth information of the reference signal is preset fixed bandwidth information, generate a transmission period of the reference signal according to the cell signal quality reported by the UE; or
- the processor 2002 is specifically configured to generate, according to the cell signal quality reported by the UE, a transmission period and bandwidth information of the reference signal.
- the transmitter 2010 is specifically configured to: according to a sending period and bandwidth information of the reference signal, send the reference signal in a sending position of the corresponding RE in a sending period of each of the reference signals .
- only the RE for transmitting the reference signal is included on an OFDM symbol corresponding to a transmission period of the reference signal and bandwidth information.
- the processor 2002 is further configured to use, according to the cell identifier, a relationship table. Obtaining the frequency offset corresponding to the cell identifier and at least one of the antenna ports; wherein the relationship table includes a correspondence between the cell identifier and the frequency offset, and the cell identifier Correspondence with at least one of the antenna ports.
- the processor 2002 is specifically configured to determine at least one of the following formulas according to the following formula
- the p is an identifier of the antenna port, and the N is the cell identifier.
- the processor 2002 is specifically configured to determine at least one according to the following formula
- the P is an identifier of the antenna port, where N is the cell identifier, and the N is a positive integer.
- the processor 2002 is specifically configured to: if at least two antenna ports for transmitting the reference signal are needed, after determining the identifier of one of the antenna ports, determine other antenna ports according to the identifier of the antenna port. logo.
- FIG. 8 is a schematic flowchart of a method for transmitting a reference signal according to an embodiment of the present invention.
- the execution body of the method may be, but is not limited to, a base station, a relay node, and a repeater.
- Step 100 Determine a frequency offset according to a cell identifier The shift and at least one antenna port for transmitting the reference signal.
- the reference signal may be a CRS or a Discovery Reference Signal (DRS).
- DRS Discovery Reference Signal
- the specific form of the reference signal is not limited herein.
- the cell identifier may be a physical identifier of the cell or a virtual identifier of the cell.
- the base station of each cell determines the frequency offset of the cell according to the respective cell identity, and at least one antenna port for transmitting the reference signal.
- Step 101 Determine, according to a frequency offset and at least one antenna port for transmitting a reference signal, a sending location of the resource unit RE, where the sending location of the RE includes a time domain of the RE The transmission location and the frequency domain transmission location of the RE.
- Step 102 Send the reference signal according to a sending position of the RE.
- the method for transmitting a reference signal determines a frequency offset and at least one antenna port for transmitting the reference signal according to the cell identifier; and according to the frequency offset and at least one for transmitting the reference signal
- the antenna port determines a transmission location of the RE, and the transmission location of the RE includes a time domain transmission location of the RE and a frequency domain transmission location of the RE; transmitting the reference signal according to the transmission location of the RE, Determining, according to the cell identifier, the at least one antenna port for transmitting the reference signal according to the cell identifier, so that the neighboring cell adopts the cell identifier of the respective cell on the basis of using the frequency offset to transmit the reference signal.
- the corresponding antenna ports transmit reference signals of respective cells, thereby avoiding interference caused by collision of reference signals of adjacent cells, thereby improving RRM measurement accuracy.
- FIG. 9 is a schematic flowchart of another method for transmitting a reference signal according to an embodiment of the present invention. Referring to FIG. 9, before step 100, the method further includes:
- Step 103 Acquire at least one of a sending period and a bandwidth information of the reference signal, where the bandwidth information of the reference signal is used to indicate a frequency domain sending position of the RE.
- At least one of sending period and bandwidth information of obtaining the reference signal may be implemented in the following two manners:
- Manner 1 Obtain at least one of a transmission period and bandwidth information of the reference signal according to a notification message sent from the network control device.
- the network control device may be a base station with computing and statistical capabilities, or other network entity. Moreover, the network control device can perform the interaction of the notification message through the backhaul or the X2 interface.
- Manner 2 Generate at least one of a transmission period and bandwidth information of the reference signal according to a cell signal quality reported by the user equipment UE.
- the base station may set two thresholds, for example, a first threshold and a second threshold, where the first threshold is greater than the second threshold, and when the cell signal quality reported by the UE is less than the second threshold, Determining that the signal quality of the cell is poor, and generating at least one of a transmission period and a bandwidth information of the reference signal; or determining that the cell signal quality reported by the UE is greater than or equal to a second threshold and less than the first threshold.
- two thresholds for example, a first threshold and a second threshold, where the first threshold is greater than the second threshold, and when the cell signal quality reported by the UE is less than the second threshold, Determining that the signal quality of the cell is poor, and generating at least one of a transmission period and a bandwidth information of the reference signal; or determining that the cell signal quality reported by the UE is greater than or equal to a second threshold and less than the first threshold.
- the cell signal quality is medium, correspondingly generating at least one of a transmission period and bandwidth information of the reference signal; or, when the UE When the reported cell signal quality is greater than or equal to the first threshold, determining that the cell signal quality is superior, correspondingly generating at least one of a transmission period and bandwidth information of the reference signal.
- the bandwidth information of the reference signal is generated according to the cell signal quality.
- the base station may select the matched bandwidth information in several optional bandwidth information according to the cell signal quality.
- the protocol specifies that the reference signal period is 40 ms, and the bandwidth can be one of 5 MHz Z /10 MHz/20 MHz, which can be selected according to the specific situation. It should be noted that the worse the cell signal quality is, the larger the bandwidth information is selected.
- Scenario 2 If the bandwidth information of the reference signal is preset fixed bandwidth information, generate a transmission period of the reference signal according to the cell signal quality.
- the base station may perform a selective matching transmission period in several optional transmission periods according to the cell signal quality.
- the protocol specifies that the bandwidth of the reference signal is full bandwidth (all bandwidths are sent), and the transmission period is one of 40ms/80ms/100ms, which can be selected according to the specific situation. It should be noted that the worse the cell signal quality is, the smaller the transmission period is selected.
- Scenario 3 generating a transmission period and bandwidth of the reference signal according to the cell signal quality
- the protocol specifies several optional bandwidth information of the reference signal, and provides several optional transmission periods.
- the base station may select the transmission period and bandwidth information according to the cell signal quality. .
- the bandwidth information and the transmission period of the reference signal may also be fixed values.
- the base station does not need to generate bandwidth information and/or a transmission period, but obtains preset bandwidth information and sends from the storage medium of the base station. cycle.
- step 101 is:
- Step 101a Perform frequency offset processing on a frequency domain position of a resource unit RE for carrying the reference signal according to the frequency offset.
- step 102 one possible implementation of step 102 is:
- Step 102a Send the reference signal at a sending position of the corresponding RE according to a sending period and a bandwidth information of the reference signal in a sending period of each of the reference signals.
- the base station interferes with the reference signal sent by the base station of other cells when scheduling data on some PRBs, in order to avoid the influence of such interference on the accuracy of the RRM measurement, an optimized implementation is given below. the way:
- the RE for transmitting the reference signal is only included on an OFDM symbol corresponding to a transmission period of the reference signal and bandwidth information.
- the system bandwidth of each cell is 50 PRBs. It is determined that the period of the reference signal transmission is sent once for 40 ms, and the bandwidth of the reference signal transmission is 6 PRBs with the system bandwidth in the middle. Such three neighboring cells transmit a reference signal every 40 ms and send 6 PRBs in the middle of the system bandwidth. After the above information is notified to the UE, the UE performs RRM measurement only in the middle 6 PRBs.
- the OFDM symbol corresponding to the bandwidth information on the six PRBs only includes the RE for transmitting the reference signal, and does not transmit other data or signals, but may be included on other OFDM symbols on the six PRBs. It may also not contain other data or reference signals. Thereby, interference with reference signals of other cell base stations is prevented due to scheduling other data.
- step 100 A possible implementation of step 100 is:
- Step 100a Obtain, according to the cell identifier, the frequency offset corresponding to the cell identifier and at least one of the antenna ports in a relationship table, where the relationship table includes the cell identifier and the Corresponding relationship of frequency offsets, and correspondence between the cell identifier and at least one of the antenna ports.
- V shift A mod6 ( 1 )
- the ⁇ 1 ⁇ 2 is a frequency offset
- N is the cell identifier
- the correspondence between the cell identifier and the at least one antenna port can be obtained by the following formula (2):
- the p is an identifier of the antenna port, and the N is the cell identifier. Or, you can also get:
- the P is an identifier of the antenna port, where N is the cell identifier, and the N is a positive integer, for example, 3 or 4. It should be noted that if ⁇ is obtained by using the above formula (2), it may be 0 or 2, and P obtained by the above formula (3) may be one of 0, 1, 2, 3.
- the RE of the antenna port of the reference signal may have a one-to-one correspondence with the RE of the antenna port of the CRS in the prior art, or may be a one-to-many correspondence.
- the one-to-one correspondence relationship refers to: an antenna port of a reference signal in this embodiment
- RE is the RE corresponding to the antenna port of a CRS.
- the reference signal AP0 corresponds to CRS AP0; the reference signal API corresponds to CRS AP1; the reference signal AP2 corresponds to CRS AP2; and the reference signal AP3 corresponds to CRS AP3.
- the one-to-many correspondence refers to:
- the RE of the antenna port of one reference signal in this embodiment may correspond to the RE corresponding to the antenna ports of the multiple CRSs.
- the reference signal AP0 corresponds to CRS AP0
- the reference signal API corresponds to the CRS API
- the reference signal AP2 corresponds to AP2 and AP3 (-to-multiple) of the CRS.
- the advantage is that if there is a one-to-one correspondence, the reference signal AP2 corresponds to the CRS AP2.
- the number of REs of the CRS AP2 in one PRB is four, which is less than the reference signals AP0 and AP1.
- the reference signal AP2 includes the REs of CRS AP2 and AP3, so that a PR is included in the PRB, achieving the same density as the AP0 and API, thereby improving the RRM measurement accuracy.
- the base station can select multiple antenna ports for transmission of reference signals. Specifically, the base station can select n antenna ports at most, where n N.
- the transmission mode of the reference signal transmitted between the base stations is optimized, and the reference signal collision of different base stations is avoided, and the RRM measurement accuracy is further improved.
- the manner of obtaining multiple antenna ports may be:
- the identifiers of the other antenna ports are determined according to the identifier of the antenna port.
- the identity of the other antenna port can be obtained by the following formula (4):
- the identifiers of other antenna ports can be obtained by adding "1" to the known antenna port identifier.
- the number of REs of AP2 and AP3 in the prior art is increased to 8.
- the left side is a RE map of four APs of the CRS in the prior art. It can be seen that AP0 and API occupy 8 REs in one PRB, while AP2 and AP3 occupy 4 REs. Since the number of REs is halved, the accuracy of RRM measurement based on AP2 and AP3 is inferior to that based on AP0 and API.
- the right side is the RE map of the four APs used to transmit the reference signal according to the embodiment of the present invention.
- the REs occupied by AP2 and AP3 are changed to eight, which ensures the same RE density, thereby improving the RRM measurement. Precision.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
本发明提供一种发送参考信号的装置及方法,通过根据小区标识确定频率偏移量和至少一个用于发送参考信号的天线端口;根据频率偏移量和至少一个用于发送参考信号的天线端口确定RE的发送位置,RE的发送位置包含RE的时域发送位置和RE的频域发送位置,根据RE的发送位置发送参考信号,实现了在根据小区标识确定频率偏移量的基础上,再根据小区标识确定至少一个用于发送参考信号的天线端口,使得相邻小区在采用频率偏移发射参考信号的基础上,采用各自小区的小区标识对应的天线端口发射各自小区的参考信号,从而避免相邻小区的参考信号碰撞造成干扰,从而提高了RRM测量精度。
Description
发送参考信号的装置及方法 技术领域
本发明涉及通信技术, 尤其涉及一种发送参考信号的装置及方法。 背景技术
长期演进 (Long Term Evolution, 简称: LTE) 网络中, 用户设备 (User Equipment, 简称: UE)在进行切换 (handover)操作之前, 首先需要判断除 了正在保持连接的小区, 附近是否还有其他的小区, 这些小区的信号质量如 何, 如果周围有其他小区的信号质量好于正在保持连接的小区, 或者满足其 他的切换条件, 那么网络就会启动切换流程, 将这个 UE切换到更合适的小区 上去。 这就需要 UE对周围的小区进行"小区发现与测量", 在 LTE中也称这样 的测量叫做无线资源管理(Radio Resource Management, 简称: RRM)测量。 现有技术中 UE的 RRM测量主要是通过检测基站发送的小区特定参考信号 (Cell-specific Reference Signal, 简称: CRS ) 来完成的。 在 LTE系统中, 系 统带宽会分成很多个资源块(Physical Resource Block, 简称: PRB ) , 例如, 一个系统带宽被分成了 50个 PRB。 而每个 PRB还可以继续划分为更小的资源 单位 (Resource Element, 简称: RE) 。 每个 RE上可以传输一个信号。
随着无线通信需求的增加, 网络的负载越来越重。 为了满足用户体验, 一种直接有效的办法就是增加基站数量。 尤其是在小型化基站 (small cell) 出现之后, 密集部署基站成为了可能。 但是, 如果相邻两个小区的 CRS在相 同的 RE上发送, 会造成较大的相互干扰。 所以现有的 LTE网络中, 每个小区 发送 CRS会采用频率偏移来避免相邻小区碰撞带来的相互干扰。 其中, 频率 偏移指的是 CRS发送的位置在频率上移动^ 个RE。 vshift由每个小区的小区 id 得到, g卩 Vshift = A mod6。
但是在网络密集部署之后, 现有的 RRM测量机制会出现新的问题: 如果 两个小区的频率偏移正好相同(例如小区 1的 id是 3, 小区 2的 id是 9, 则其频率 偏移都是 3 ) , 那么 CRS正好会碰撞, 造成更为严重的干扰。 由于基站的密集 部署, 这种碰撞的概率大大增加, 从而造成了 RRM测量精度的降低。
发明内容
本发明实施例提供一种发送参考信号的装置及方法, 用于提高 RRM测 量精度。
本发明的第一个方面是提供一种发送参考信号的装置, 包括:
处理模块, 用于根据小区标识确定频率偏移量和至少一个用于发送参 考信号的天线端口; 根据频率偏移量和至少一个用于发送参考信号的天线 端口确定资源单位 RE的发送位置,所述 RE的发送位置包含所述 RE的时 域发送位置和所述 RE的频域发送位置;
发送模块, 用于根据所述 RE的发送位置发送所述参考信号。
结合第一个方面, 在第一种可能的实现方式中, 所述处理模块, 还用 于在根据小区标识确定频率偏移量和至少一个用于发送参考信号的天线 端口之前,获取所述参考信号的发送周期和带宽信息中的至少一个;其中, 所述参考信号的带宽信息用于指示所述 RE的频域发送位置。
结合第一个方面的第一种可能的实现方式, 在第二种可能的实现方式 中, 所述处理模块用于获取所述参考信号的发送周期和带宽信息中的至少 一个具体包括:
所述处理模块, 具体用于根据从网络控制设备发送的通知消息, 获取 所述参考信号的发送周期和带宽信息中的至少一个; 或者,
根据用户设备 UE上报的小区信号质量, 生成所述参考信号的发送周 期和带宽信息中的至少一个。
结合第一个方面的第二种可能的实现方式, 在第三种可能的实现方式 中, 所述处理模块, 具体用于若所述参考信号的发送周期为预置的固定周 期, 则根据所述 UE上报的小区信号质量生成所述参考信号的带宽信息; 或者,
所述处理模块, 具体用于若所述参考信号的带宽信息为预置的固定带 宽信息, 则根据所述 UE上报的小区信号质量生成所述参考信号的发送周 期; 或者,
所述处理模块, 具体用于根据所述 UE上报的小区信号质量生成所述 参考信号的发送周期和带宽信息。
结合第一个方面的上述任意一种可能的实现方式, 在第四种可能的实
现方式中, 所述发送模块, 具体用于根据所述参考信号的发送周期和带宽 信息, 在每个所述参考信号的发送周期, 在相应的所述 RE的发送位置发 送所述参考信号。
结合第一个方面的上述任意一种可能的实现方式, 在第五种可能的实 现方式中, 还包括:
在所述参考信号的发送周期和带宽信息对应的正交频分复用 OFDM 符号上仅包含用于发送所述参考信号的所述 RE。
结合第一个方面的上述任意一种可能的实现方式, 在第六种可能的实 现方式中, 所述处理模块, 还具体用于根据所述小区标识, 在关系表中获 取与所述小区标识对应的所述频率偏移量和至少一个所述天线端口;
其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
结合第一个方面或第一个方面的上述任意一种可能的实现方式, 在第 七种可能的实现方式中, 所述处理模块, 具体用于根据如下公式确定至少 一个用于发送参考信号的 口:
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识。 结合第一个方面或第一个方面的第一种至第五种可能的实现方式 的任意一种, 在第八种可能的实现方式中, 所述处理模块, 具体用于根 如下公式确定至少一个用于 送参考信号的天线端口:
其中, 所述 P为所述天线端口的标识, 所述 N 为所述小区标识, 所 述 N是一个正整数。
结合第一个方面的第七种可行的实现方式或第一个方面的第八种可 能的实现方式, 在第九种可能的实现方式中, 所述处理模块, 具体用于若 需要至少两个用于发送参考信号的天线端口, 则在确定一个所述天线端口 的标识后, 根据所述天线端口的标识确定其他天线端口的标识。
本发明的第二个方面是提供一种发送参考信号的装置, 包括:
处理器, 用于根据小区标识确定频率偏移量和至少一个用于发送参考 信号的天线端口; 根据频率偏移量和至少一个用于发送参考信号的天线端 口确定资源单位 RE的发送位置,所述 RE的发送位置包含所述 RE的时域 发送位置和所述 RE的频域发送位置;
发射器, 用于根据所述 RE的发送位置发送所述参考信号。
结合第二个方面, 在第一种可能的实现方式中, 所述处理器, 还用于 在根据小区标识确定频率偏移量和至少一个用于发送参考信号的天线端 口之前, 获取所述参考信号的发送周期和带宽信息中的至少一个; 其中, 所述参考信号的带宽信息用于指示所述 RE的频域发送位置。
结合第二个方面的第一种可能的实现方式, 在第二种可能的实现方式 中, 所述处理器用于获取所述参考信号的发送周期和带宽信息中的至少一 个具体包括:
所述处理器, 具体用于根据从网络控制设备发送的通知消息, 获取所 述参考信号的发送周期和带宽信息中的至少一个; 或者,
根据用户设备 UE上报的小区信号质量, 生成所述参考信号的发送周 期和带宽信息中的至少一个。
结合第二个方面的第二种可能的实现方式, 在第三种可能的实现方式 中,所述处理器,具体用于若所述参考信号的发送周期为预置的固定周期, 则根据所述 UE上报的小区信号质量生成所述参考信号的带宽信息;或者, 所述处理器, 具体用于若所述参考信号的带宽信息为预置的固定带宽 信息,则根据所述 UE上报的小区信号质量生成所述参考信号的发送周期; 或者,
所述处理器, 具体用于根据所述 UE上报的小区信号质量生成所述参 考信号的发送周期和带宽信息。
结合第二个方面的上述任意一种可能的实现方式, 在第四种可能的实 现方式中, 所述发射器, 具体用于根据所述参考信号的发送周期和带宽信 息, 在每个所述参考信号的发送周期, 在相应的所述 RE的发送位置发送 所述参考信号。
结合第二个方面的上述任意一种可能的实现方式, 在第五种可能的实 现方式中, 还包括:
在所述参考信号的发送周期和带宽信息对应的正交频分复用 OFDM 符号上仅包含用于发送所述参考信号的所述 RE。
结合第二个方面的上述任意一种可能的实现方式, 在第六种可能的实 现方式中, 所述处理器, 还具体用于根据所述小区标识, 在关系表中获取 与所述小区标识对应的所述频率偏移量和至少一个所述天线端口;
其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
结合第二个方面或第二个方面的上述任意一种可能的实现方式, 在第 七种可能的实现方式中, 所述处理器, 具体用于根据如下公式确定至少一 个用于发送参考信号的天 口:
其中, 所述 P为所述天线端口的标识, 所述 N 为所述小区标识。 结合第二个方面或第二个方面的第一种至第五种可能的实现方式 的任意一种, 在第八种可能的实现方式中, 所述处理器, 具体用于根据 下公式确定至少一个用于发送 口:
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识, 所 述 N是一个正整数。
结合第二个方面的第七种可行的实现方式或第二个方面的第八种可 能的实现方式, 在第九种可能的实现方式中, 所述处理器, 具体用于若需 要至少两个用于发送参考信号的天线端口, 则在确定一个所述天线端口的 标识后, 根据所述天线端口的标识确定其他天线端口的标识。
本发明的第三个方面是提供一种发送参考信号的方法, 包括:
根据小区标识确定频率偏移量和至少一个用于发送参考信号的天线 端口;
根据频率偏移量和至少一个用于发送参考信号的天线端口确定资源 单位 RE的发送位置,所述 RE的发送位置包含所述 RE的时域发送位置和 所述 RE的频域发送位置;
根据所述 RE的发送位置发送所述参考信号。
结合第三个方面, 在第一种可能的实现方式中, 在所述根据小区标识 确定频率偏移量和至少一个用于发送参考信号的天线端口之前, 还包括: 获取所述参考信号的发送周期和带宽信息中的至少一个; 其中, 所述 参考信号的带宽信息用于指示所述 RE的频域发送位置。
结合第三个方面的第一种可能的实现方式, 在第二种可能的实现方式 中, 所述获取所述参考信号的发送周期和带宽信息中的至少一个, 包括: 根据从网络控制设备发送的通知消息, 获取所述参考信号的发送周期 和带宽信息中的至少一个; 或者,
根据用户设备 UE上报的小区信号质量, 生成所述参考信号的发送周 期和带宽信息中的至少一个。
结合第三个方面的第二种可能的实现方式, 在第三种可能的实现方式 中, 所述生成所述参考信号的发送周期和带宽信息中的至少一个, 包括: 若所述参考信号的发送周期为预置的固定周期, 则根据所述 UE上报 的小区信号质量生成所述参考信号的带宽信息; 或者,
若所述参考信号的带宽信息为预置的固定带宽信息, 则根据所述 UE 上报的小区信号质量生成所述参考信号的发送周期; 或者,
则根据所述 UE上报的小区信号质量生成所述参考信号的发送周期和 带宽信息。
结合第三个方面的上述任意一种可能的实现方式, 在第四种可能的实 现方式中, 所述通过至少一个所述天线端口在所述 RE发送所述参考信号 在所述 RE通过所述天线端口发送所述参考信号, 包括:
根据所述参考信号的发送周期和带宽信息, 在每个所述参考信号的发 送周期, 在相应的所述 RE的发送位置发送所述参考信号。
结合第三个方面的上述任意一种可能的实现方式, 在第五种可能的实 现方式中, 还包括:
在所述参考信号的发送周期和带宽信息对应的正交频分复用 OFDM 符号上仅包含用于发送所述参考信号的所述 RE。
结合第三个方面的上述任意一种可能的实现方式, 在第六种可能的实 现方式中, 所述根据小区标识确定频率偏移量和至少一个用于发送参考信
号的天线端口, 包括:
根据所述小区标识, 在关系表中获取与所述小区标识对应的所述频率 偏移量和至少一个所述天线端口;
其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
结合第三个方面或第三个方面的上述任意一种可能的实现方式, 在第 七种可能的实现方式中, 所述根据小区标识确定频率偏移量和至少一个用 于发送参考信号的天线端口, 其中, 根据如下公式确定至少一个用于发送 参考信号的天线端口:
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识。 结合第三个方面或第三个方面的第一种至第五种可能的实现方式中 的任意一种, 在第八种可能的实现方式中, 所述根据小区标识确定频率偏 移量和至少一个用于发送参考信号的天线端口, 其中, 根据如下公式确定 至少一个用于发送参考信号 口:
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识, 所 述 N是一个正整数。
结合第三个方面的第七种可行的实现方式或第三个方面的第八种可 能的实现方式, 在第九种可能的实现方式中, 还包括: 若需要至少两个用于发送参考信号的天线端口, 则在确定一个所述天 线端口的标识后, 根据所述天线端口的标识确定其他天线端口的标识。
本实施例提供的发送参考信号的装置及方法,通过发送参考信号的装置 根据小区标识确定频率偏移量和至少一个用于发送参考信号的天线端口; 根据频率偏移量和至少一个用于发送参考信号的天线端口确定 RE的发送 位置,所述 RE的发送位置包含所述 RE的时域发送位置和所述 RE的频域 发送位置, 发送参考信号的装置根据所述 RE 的发送位置发送所述参考信 号, 实现了在根据小区标识确定频率偏移量的基础上, 再根据小区标识确
定至少一个用于发送参考信号的天线端口, 使得相邻小区在采用频率偏移 发射参考信号的基础上, 采用各自小区的小区标识对应的天线端口发射各 自小区的参考信号, 从而避免相邻小区的参考信号碰撞造成干扰, 从而提 高了 RRM测量精度。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图做一简单地介绍, 显而易见 地, 下面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员 来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的 附图。 图 1为现有技术 CRS发送示意图;
图 2为小区频率偏移的示意图;
图 3为本发明实施例提供的一种发送参考信号的装置的结构示意图; 图 4为本发明实施例提供的一种小区发送参考信号的示意图; 图 5为本发明实施例提供的一种参考信号发送示意图;
图 6为本发明实施例提供的 RE映射对比示意图;
图 7 为本发明实施例提供的另一种发送参考信号的装置的结构示意 图;
图 8为本发明实施例提供的一种发送参考信号的方法的流程示意图; 图 9为本发明实施例提供的另一种发送参考信号的方法的流程示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述, 显然,所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
现有技术中用户设备 (User Equipment, 简称: UE) 的无线资源管理 ( Radio Resource Management, 简称: RRM ) 测量主要是通过检测基站发
送的 CRS来完成的。 我们在下文中详细介绍 CRS的结构。
首先, 每个小区都在一定的频段上发送信号。 频段的带宽称为系统带 宽。 在 LTE 系统中, 系统带宽会分成很多个资源块 (Physical Resource Block, 简称: PRB ),每个资源块的频域宽度为 180kHz,持续时间为 lms。 图 1为现有技术 CRS发送示意图, 如图 1 中的最左边所示, 一个系统带 宽被分成了 50个 PRB。 而每个 PRB 还可以继续划分为更小的资源单位 ( Resource Element, 简称: RE) 。 每个 RE上可以传输一个信号。 如图 1 的中间, 示出了一个 PRB的细节图。 图 1中每一个小方块代表一个 RE, 可以看出, 一个 PRB由很多个 RE组成。 在图 1中, 采用不同线段填充的 方块, 在 LTE协议中是可以用来传输 CRS的 RE, 而其余的 RE用来传输 数据或者其他参考信号。 目前的 LTE系统中, CRS是全带宽发送的。 也 就是说, 所有的 PRB上都会有 CRS的发送。 进一歩的, CRS还分成 4个 天线端口 (Antenna Port, 简称: AP ) , 称为 AP0, API , AP2, AP3。 CRS 通过不同的天线端口进行发射。 如图 1所示。 现有技术中, 一个基站可以 采用 1个, 2个或者 4个天线端口进行 CRS的发送。 如果基站采用 1天线 端口的发送, 则只发送 CRS AP0; 如果基站采用 2天线端口的发送, 则发 送 CRS AP0山如果基站采用 4天线端口的发送,则发送 CRS AP 0, 1, 2, 3。
进一歩的, 如果相邻两个小区的 CRS在相同的 RE发送位置上发送, 会造成较大的相互干扰。 所以现有的 LTE网络中, 每个小区发送 CRS会 采用一个频率偏移。 所谓频率偏移(frequency shift)指的是用于发送 CRS 的 RE发送位置在频率上移动^«个 RE。 由每个小区的小区 id得到, gp
a 图 2为小区频率偏移的示意图, 参照图 2所示, 有两个 相邻小区, 小区 id分别是 6和 8。 假设这两个小区分别只使用 CRS AP0 进行 CRS的发送。 那么按照上面的公式计算出来, 它们的 frequency shift 分别是 0和 2, 所以, cell id为 8的小区的 CRS对应的 RE发送位置会向 上移动 2个 RE。 这样用来保证两个小区的 CRS发送在不同的 RE上, 避 免了碰撞带来的相互干扰。在进行 RRM测量的时候, UE会获知周围小区 的 id, 然后按照小区 id计算出这个小区的 CRS frequency offset, 然后到相 应的 RE上去接收 CRS , 并进行测量。 显然, 测量需要达到一定的精度, 如果测量不准确, 那么 UE上报的 RRM测量结果会不准确, 导致基站做
出错误的决定。 影响测量精度的主要因素是干扰水平的高低, 如果干扰太 大, 则测量精度会受到影响。
随着无线通信需求的增加,网络的负载越来越重。为了满足用户体验, 一种直接有效的办法就是增加基站数量。 这样, 在相同的区域, 如果布置 了更多的基站, 就可以有效的提升网络速度, 使得用户体验提升。 尤其是 在小型化基站 (small cell ) 出现之后, 密集部署基站成为了可能。
但是在网络密集部署之后, 现有的 RRM测量机制会出现新的问题。 如果两个小区的 frequency shift正好相同 (例如小区 1的 id是 3, 小区 2 的 id是 9, 则其 frequency shift都是 3 ) , 那么 CRS正好会碰撞, 造成更 为严重的干扰。 由于基站的密集部署, 这种碰撞的概率大大增加。
由于上述原因, CRS所受到的干扰大大增加, 造成了 RRM测量精度 的降低。本发明的实施例提供一种发送参考信号的装置及方法,以解决 RRM 测量精度降低的问题。
图 3为本发明实施例提供的一种发送参考信号的装置的结构示意图, 该 发送参考信号的装置可以作为独立的设备设置在基站、 中继节点 (Relay) , 转发器 ( Repeater ) , D2D ( Device to Device Communication) 设备等上, 也可以集成在上述设备里, 下文中如没有特别说明, 执行主体均已基站为例, 参照图 3, 该装置包括: 处理模块 10、 发送模块 11。
处理模块 10,用于根据小区标识确定频率偏移量和至少一个用于发送 参考信号的天线端口; 根据频率偏移量和至少一个用于发送参考信号的天 线端口确定 RE的发送位置,所述 RE的发送位置包含所述 RE的时域发送 位置和所述 RE的频域发送位置。
具体的, 该参考信号可以为 CRS 也可以为发现参考信号 (Discovery Reference Signal, 简称: DRS ) , 此处对于参考信号具体形式不予限定。 并且小区标识可以是小区的物理标识或者是小区的虚拟标识。
具体的, 每个小区的基站根据各自小区标识确定该小区的频率偏移 量, 以及至少一个用于发送参考信号的天线端口。
需要说明的是, 根据小区标识确定频率偏移量后, 可以依据该频率偏 移量对 RE的频域发送位置进行调整, 从而实现不同小区的参考信号在对 应的 RE的频域发送位置有所区别, 根据小区标识确定至少一个用于发送
参考信号的天线端口后, 由于不同的天线端口对应的 RE的时域发送位置 不同, 从而实现不同小区的参考信号在对应的 RE的时域发送位置有所区 另 |J。 进一歩地, 对于天线端口, 也可以设置不同的天线端口采用不同的 RE 的频域发送位置, 从而更好地对不同小区加以区别, 从而提高抗干扰 能力。
发送模块 11, 用于根据所述 RE的发送位置发送所述参考信号。
本实施例提供的发送参考信号的装置, 通过处理模块根据小区标识确 定频率偏移量和至少一个用于发送参考信号的天线端口; 根据频率偏移量 和至少一个用于发送参考信号的天线端口确定 RE 的发送位置, 所述 RE 的发送位置包含所述 RE的时域发送位置和所述 RE的频域发送位置, 发 送模块根据所述 RE的发送位置发送所述参考信号, 实现了在根据小区标 识确定频率偏移量的基础上, 再根据小区标识确定至少一个用于发送参考 信号的天线端口, 使得相邻小区在采用频率偏移发射参考信号的基础上, 采用各自小区的小区标识对应的天线端口发射各自小区的参考信号, 从而 避免相邻小区的参考信号碰撞造成干扰, 从而提高了 RRM测量精度。
优选地, 所述处理模块 10, 还用于在根据小区标识确定频率偏移量和 至少一个用于发送参考信号的天线端口之前, 获取所述参考信号的发送周 期和带宽信息中的至少一个; 其中, 所述参考信号的带宽信息用于指示所 述 RE的频域发送位置。
进一歩地, 所述处理模块 10获取所述参考信号的发送周期和带宽信 息中的至少一个, 可以通过如下方式实现:
方式一: 所述处理模块 10, 具体用于根据从网络控制设备发送的通知 消息, 获取所述参考信号的发送周期和带宽信息中的至少一个; 或者, 方式二: 根据用户设备 UE上报的小区信号质量, 生成所述参考信号 的发送周期和带宽信息中的至少一个。
进一歩地, 针对处理模块 10根据用户设备 UE上报的小区信号质量, 生成所述参考信号的发送周期和带宽信息中的至少一个的场景, 处理模块 10可以通过如下任意一种方式实现:
方式一: 所述处理模块 10, 具体用于若所述参考信号的发送周期为预 置的固定周期, 则根据所述 UE上报的小区信号质量生成所述参考信号的
带宽信息。
具体的, 一种可能的实现方式为: 若参考信号的发送周期为预置的定 值, 此时, 处理模块 10可以根据小区信号质量, 在几个可选的带宽信息 中进行选择匹配的带宽信息。 例如协议规定参考信号的周期是 40ms, 而 带宽可以是 5MHz/10MHz/20MHz中的一个, 可以根据具体情况选择。 需 要说明的是, 小区信号质量越差, 则选择较大的带宽信息。
方式二: 所述处理模块 10, 具体用于若所述参考信号的带宽信息为预 置的固定带宽信息, 则根据所述 UE上报的小区信号质量生成所述参考信 号的发送周期。
具体的, 一种可能的实现方式为: 若参考信号的带宽信息为预置的定 值, 此时, 处理模块 10可以根据小区信号质量, 在几个可选的发送周期 中进行选择匹配的发送周期。 例如协议规定参考信号的带宽是全带宽 (所 有带宽都发送) , 而发送周期是 40ms/80ms/100ms中的一个, 可以根据具 体情况选择。需要说明的是, 小区信号质量越差, 则选择较小的发送周期。
方式三: 所述处理模块 10, 具体用于根据所述 UE上报的小区信号质 量生成所述参考信号的发送周期和带宽信息。
具体的, 一种可能的实现方式为: 协议规定参考信号几个可选的带宽 信息, 并且给出了几个可选的发送周期, 此时, 处理模块 10可以根据小 区信号质量选择发送周期和带宽信息。
需要说明的是, 参考信号的带宽信息和发送周期也可以都是定值, 此 时处理模块 10不需要生成带宽信息和 /或发送周期, 而是从该装置的存储 介质中获得预置的带宽信息和发送周期。
优选地, 所述发送模块 11, 具体用于根据所述参考信号的发送周期和 带宽信息, 在每个所述参考信号的发送周期, 在相应的所述 RE的发送位 置发送所述参考信号。
优选地, 由于基站在某些 PRB 上调度数据时, 也会对其他小区的基 站发送的参考信号造成干扰, 因此, 为了避免这种干扰对于 RRM测量精 度的影响, 在所述参考信号的发送周期和带宽信息对应的正交频分复用 (Orthogonal Frequency Division Multiplexing. 简称: OFDM)符号上仅包含 用于发送所述参考信号的所述 RE。
具体的,图 4为本发明实施例提供的一种小区发送参考信号的示意图, 参照图 4, 假设有三个相邻小区, 每个小区的系统带宽为 50个 PRB。 确 定参考信号发送的周期为 40ms发送一次, 参考信号发送的带宽是系统带 宽位于中间的 6个 PRB。 这样三个相邻小区都每隔 40ms发送一次参考信 号, 并且发送在系统带宽中间的 6个 PRB。 将上述信息通知 UE之后, UE 只在中间 6个 PRB进行 RRM测量。 而在这 6个 PRB上与带宽信息对应 的 OFDM符号上仅包含用于发送所述参考信号的所述 RE, 不发送其他数 据或信号, 而在这 6个 PRB上的其他 OFDM符号上可以包含也可以不包 含其他数据或参考信号。 从而避免了由于调度其他数据而对其他小区基站 的参考信号产生干扰。
可选地, 所述处理模块 10, 还具体用于根据所述小区标识, 在关系表 中获取与所述小区标识对应的所述频率偏移量和至少一个所述天线端口; 其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
进一歩地, 所述处理模块 10, 具体用于根据如下公式 (1 ) 获得所述 小区标识与所述频率偏移量的对应关系: 进一歩的, 所述处理模块 10, 具体用于根据如下公式 (2 ) 确定至少 一个用于发送参考信号的天线端口:
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识。 进一歩的, 所述处理模块 10, 具体用于根据如下公式 (3 ) 确定至少 一个用于发送参考信号的天线端口:
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识, 所 述 N是一个正整数。
需要说明的是, 处理模块 10可以通过上述公式 (1 ) 、 ( 2 ) 、 ( 3 ) 预先获得结果, 并将结果预置在上述关系表中; 或者, 处理模块 10每次
获得小区标识, 既根据上述公式 (1 ) 、 ( 2 ) 、 ( 3 ) 进行计算。
图 5为本发明实施例提供的一种参考信号发送示意图, 参照图 5, 若 两个相邻小区的 id分别是 0和 6, 那么根据公式 1 )计算出来的 frequency shift是相同的。 两个相邻小区按照现有技术发送的参考信号的 RE会发生 碰撞,造成测量精度的下降。而在获得 frequency shift基础上,根据公式 2 ) 其中可知: cell id 0使用 AP0进行发送, 而 cell id 6使用 AP2进行发送。 则参照图 5, 相邻小区发送的参考信号不再发生碰撞。
需要说明的是,上述参考信号的天线端口的 RE与现有技术中 CRS的 天线端口的 RE可以是一一对应关系, 也可以是一对多对应关系。
其中, 一一对应关系指: 本实施例中的一个参考信号的天线端口的
RE就是对应一个 CRS的天线端口对应的 RE。例如可以规定参考信号 AP0 对应 CRS AP0; 参考信号 API对应 CRS AP1 ; 参考信号 AP2对应 CRS AP2; 参考信号 AP3对应 CRS AP3。 那么 cell id=0使用参考信号 AP0 进行发送, 则参考信号 AP0对应 CRS AP0, 使用 CRS AP0的 RE。
一对多对应关系指: 本实施例中的一个参考信号的天线端口的 RE可 以对应多个 CRS的天线端口对应的 RE。例如可以规定参考信号 AP0对应 CRS AP0; 参考信号 API对应 CRS API ; 参考信号 AP2对应 CRS的 AP2和 AP3 (—对多) 。 这样的好处是, 如果是一一对应的关系, 那么参 考信号 AP2对应 CRS AP2 , 根据现有技术的设置, CRS AP2在一个 PRB 内的 RE数是 4个, 少于参考信号 AP0和 AP1。 采用一对多的对应方式, 参考信号 AP2包括了 CRS AP2和 AP3的 RE,这样一个 PRB内就包括了 8个 RE, 达到了和 AP0, API相同的密度, 从而提高了 RRM测量精度。
需要说明的是, 上述公式 (1 ) 、 公式 (2 ) 以及公式 (3 ) 仅作为示 例对本实施例进行说明, 获取频率偏移量和天线端口的方式可以不限定予 上述方式, 只要能够根据小区标识得到频率偏移量、 天线端口与该小区标 识具有特定的对应关系, 保证相邻的小区之间的基站采用的频率偏移量、 天线端口彼此不相同即可。
优选地, 当基站具有 N个天线端口时, 根据图 3所示的装置, 该装置 可以选择多个天线端口进行参考信号的传输, 具体的, 最多能够选择 n个 天线端口,其中, n N。从而优化各个基站之间发送参考信号的传输方式,
避免不同基站的参考信号碰撞, 进一歩提高了 RRM测量精度。 进一歩地, 所述处理模块 10, 具体用于若需要至少两个用于发送参考 信号的天线端口, 则在确定一个所述天线端口的标识后, 根据所述天线端 口的标识确定其他天线端口的标识。
用两个天线端口, 则另一个天线端口的标识可以通过如下公式 (4 ) 获得:
照公式 (4 ) 可知, 在基站获得一个天线 端口的标识后, 其他天线端口的标识可以通过在已知的天线端口标识加 " 1 " 的方式获得。 优选地, 一个 PRB内, 将现有技术中 AP2和 AP3的 RE数量增加至 8个。 图 6为本发明实施例提供的 RE映射对比示意图, 其中, 左侧是现 有技术中的 CRS的 4个 AP的 RE映射图。可以看出, AP0和 API在一个 PRB内占据了 8个 RE, 而 AP2和 AP3占据了 4个 RE。 由于 RE数量减 半, 所以基于 AP2和 AP3进行 RRM测量的精度相对于基于 AP0和 API 会差。
右侧为本发明实施例提供的用来发射参考信号的 4个 AP的 RE映射 图, 其中, AP2和 AP3占据的 RE变为 8个, 这样保证了相同的 RE密度, 从而提高了 RRM测量的精度。
图 7为本发明实施例提供的另一种发送参考信号的装置的结构示意 图, 其适用于实施本文本所公开的组件和方法的一项或多项实施例。所 述网络组件 200可以包括处理器 2002 (可以称为中央处理器单元或 CPU ) , 所述处理器与包含以下项的存储装置进行通信: 辅助存储器 2004、 只读存储器 (ROM ) 2006、 随机存取存储器 (RAM ) 2008、 输 入 /输出 (I/O ) 装置 2000以及网络连接装置 2010。 所述处理器 2002可 以作为一个或多个 CPU芯片实施, 或者可以为一个或多个专用集成电
路 ( application specific integrated circuit, ASIC ) 的一部分。 该网络组件 200可以应用于基站、 中继节点 (Relay) , 转发器 ( Repeater ) , D2D ( Device to Device Communication ) 设备等设备上。
所述辅助存储器 2004通常由一个或多个磁盘驱动器或磁带驱动器 组成, 且用于对数据进行非易失性存储, 而且如果 RAM 2008的容量不 足以存储所有工作数据, 所述辅助存储器则用作溢流数据存储装置。所 述辅助存储器 2004可用于存储程序, 所述程序在被选择执行时, 被加 载到 RAM 2008中。所述 ROM 2006用于存储在程序执行期间读取的指 令以及也可能是的数据。 ROM 2006是非易失性存储装置, 其存储容量 相对于辅助存储器 2004的较大存储容量而言通常较小。所述 RAM 2008 用于存储易失性数据,并且还可能用于存储指令。对 ROM 2006和 RAM 2008两者的存取通常比对辅助存储器 2004的存取快。
处理器 2002,用于根据小区标识确定频率偏移量和至少一个用于发送 参考信号的天线端口; 根据频率偏移量和至少一个用于发送参考信号的天 线端口确定 RE的发送位置,所述 RE的发送位置包含所述 RE的时域发送 位置和所述 RE的频域发送位置。
发射器 2012, 用于根据所述 RE的发送位置发送所述参考信号。
本实施例提供的发送参考信号的装置, 通过处理器根据小区标识确定 频率偏移量和至少一个用于发送参考信号的天线端口; 根据频率偏移量和 至少一个用于发送参考信号的天线端口确定 RE的发送位置, 所述 RE的 发送位置包含所述 RE的时域发送位置和所述 RE的频域发送位置根据小 区标识确定频率偏移量和至少一个用于发送发现参考信号的天线端口, 再 根据所述频率偏移量选择对用于承载所述参考信号的资源单位 RE的频域 位置进行频率偏移处理, 发射器根据所述 RE的发送位置发送所述参考信 号通过至少一个所述天线端口在所述 RE发送所述参考信号, 实现了在根 据小区标识确定频率偏移量的基础上, 再根据小区标识确定至少一个用于 发送参考信号的天线端口, 使得相邻小区在采用频率偏移发射参考信号的 基础上, 采用各自小区的小区标识对应的天线端口发射各自小区的参考信 号, 从而避免相邻小区的参考信号碰撞造成干扰, 从而提高了 RRM测量 精度。
优选地, 所述处理器 2002, 还用于在根据小区标识确定频率偏移量和 至少一个用于发送参考信号的天线端口之前, 获取所述参考信号的发送周 期和带宽信息中的至少一个; 其中, 所述参考信号的带宽信息用于指示所 述 RE的频域发送位置。
进一歩地, 所述处理器 2002用于获取所述参考信号的发送周期和带 宽信息中的至少一个, 可以通过如下方式实现:
方式一: 所述处理器 2002, 具体用于根据从网络控制设备发送的通知 消息, 获取所述参考信号的发送周期和带宽信息中的至少一个。
方式二: 根据用户设备 UE上报的小区信号质量, 生成所述参考信号 的发送周期和带宽信息中的至少一个。
具体的, 网络控制设备发送的通知消息和 UE上报的小区信号质量可 以通过网络连接装置 2010进行接收, 进一歩地, 该网络连接装置 2010 可以包括多个接口, 例如, 通过 LTE-UU接口接收 UE上报小区信号质 量。 而基站之间可以通过 LTE-X2接口来协商所述参考信号的周期和带宽 等配置。 另外, 也可以是网络控制设备, 例如 MME直接通知基站所述参 考信号的周期与带宽等。
可选地, 所述处理器 2002, 具体用于若所述参考信号的发送周期为预 置的固定周期, 则根据所述 UE上报的小区信号质量生成所述参考信号的 带宽信息; 或者,
所述处理器 2002,具体用于若所述参考信号的带宽信息为预置的固定 带宽信息, 则根据所述 UE上报的小区信号质量生成所述参考信号的发送 周期; 或者,
所述处理器 2002, 具体用于根据所述 UE上报的小区信号质量生成所 述参考信号的发送周期和带宽信息。
进一歩地, 所述发射器 2010, 具体用于根据所述参考信号的发送周期 和带宽信息, 在每个所述参考信号的发送周期, 在相应的所述 RE的发送 位置发送所述参考信号。
优选地, 在所述参考信号的发送周期和带宽信息对应的 OFDM 符号 上仅包含用于发送所述参考信号的所述 RE。
优选地, 所述处理器 2002, 还具体用于根据所述小区标识, 在关系表
中获取与所述小区标识对应的所述频率偏移量和至少一个所述天线端口; 其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
进一歩地, 所述处理器 2002, 具体用于根据如下公式确定至少一个用
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识。 进一歩地, 所述处理器 2002, 具体用于根据如下公式确定至少一个
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识, 所 述 N是一个正整数。
进一歩地, 所述处理器 2002, 具体用于若需要至少两个用于发送参考 信号的天线端口, 则在确定一个所述天线端口的标识后, 根据所述天线端 口的标识确定其他天线端口的标识。
图 8为本发明实施例提供的一种发送参考信号的方法的流程示意图, 该 方法的执行主体可以但不限定为: 基站、 中继节点 (Relay ) , 转发器
( Repeater ) , D2D ( Device to Device Communication ) 设备等, 下文中如 没有特别说明, 执行主体均已基站为例, 参照图 8, 该方法包括如下歩骤: 歩骤 100、 根据小区标识确定频率偏移量和至少一个用于发送参考信 号的天线端口。
具体的, 该参考信号可以为 CRS 也可以为发现参考信号 (Discovery Reference Signal, 简称: DRS ) , 此处对于参考信号具体形式不予限定。 并且小区标识可以是小区的物理标识或者是小区的虚拟标识。
具体的, 每个小区的基站根据各自小区标识确定该小区的频率偏移 量, 以及至少一个用于发送参考信号的天线端口。
歩骤 101、 根据频率偏移量和至少一个用于发送参考信号的天线端口 确定资源单位 RE的发送位置,所述 RE的发送位置包含所述 RE的时域发
送位置和所述 RE的频域发送位置。
歩骤 102、 根据所述 RE的发送位置发送所述参考信号。
本实施例提供的发送参考信号的方法,通过发送参考信号的装置根据小 区标识确定频率偏移量和至少一个用于发送参考信号的天线端口; 根据频 率偏移量和至少一个用于发送参考信号的天线端口确定 RE的发送位置, 所述 RE的发送位置包含所述 RE的时域发送位置和所述 RE的频域发送位 置; 根据所述 RE的发送位置发送所述参考信号, 实现了在根据小区标识 确定频率偏移量的基础上, 再根据小区标识确定至少一个用于发送参考信 号的天线端口, 使得相邻小区在采用频率偏移发射参考信号的基础上, 采 用各自小区的小区标识对应的天线端口发射各自小区的参考信号, 从而避 免相邻小区的参考信号碰撞造成干扰, 从而提高了 RRM测量精度。
在图 8的基础上, 图 9为本发明实施例提供的另一种发送参考信号的方 法的流程示意图, 参照图 9, 在歩骤 100之前, 还包括:
歩骤 103、 获取所述参考信号的发送周期和带宽信息中的至少一个; 其中, 所述参考信号的带宽信息用于指示所述 RE的频域发送位置。
具体的, 对于获取所述参考信号的发送周期和带宽信息中的至少一 个, 可以通过如下两种方式实现:
方式一: 根据从网络控制设备发送的通知消息, 获取所述参考信号的 发送周期和带宽信息中的至少一个。
具体的, 网络控制设备可以是具有运算、 统计能力的基站, 或者是其 他的网络实体。 并且, 网络控制设备可以通过回程链路 (backhaul ) 或者 X2接口进行通知消息的交互。
方式二: 根据用户设备 UE上报的小区信号质量, 生成所述参考信号 的发送周期和带宽信息中的至少一个。
具体的, 一种可能的实现方式为: 基站可以设置两个阈值, 例如第一 阈值和第二阈值, 其中第一阈值大于第二阈值, 当 UE上报的小区信号质 量小于第二阈值时, 则确定该小区信号质量为差, 则相应生成参考信号的 发送周期和带宽信息中的至少一个; 或者, 当 UE上报的小区信号质量大 于或等于第二阈值, 并且小于第一阈值时, 则确定该小区信号质量为中, 则相应生成参考信号的发送周期和带宽信息中的至少一个; 或者, 当 UE
上报的小区信号质量大于或等于第一阈值时, 则确定该小区信号质量为 优, 则相应生成参考信号的发送周期和带宽信息中的至少一个。
进一歩地, 对于方式二, 生成所述参考信号的发送周期和带宽信息中 的至少一个, 存在如下三种场景:
场景一:
若所述参考信号的发送周期为预置的固定周期, 则根据所述小区信号 质量生成所述参考信号的带宽信息。
具体的, 一种可能的实现方式为: 若参考信号的发送周期为预置的定 值, 此时, 基站可以根据小区信号质量, 在几个可选的带宽信息中进行选 择匹配的带宽信息。 例如协议规定参考信号的周期是 40ms, 而带宽可以 是 5MHZ/10MHz/20MHz中的一个, 可以根据具体情况选择。 需要说明的 是, 小区信号质量越差, 则选择较大的带宽信息。
场景二: 若所述参考信号的带宽信息为预置的固定带宽信息, 则根据 所述小区信号质量生成所述参考信号的发送周期。
具体的, 一种可能的实现方式为: 若参考信号的带宽信息为预置的定 值, 此时, 基站可以根据小区信号质量, 在几个可选的发送周期中进行选 择匹配的发送周期。 例如协议规定参考信号的带宽是全带宽 (所有带宽都 发送) , 而发送周期是 40ms/80ms/100ms中的一个, 可以根据具体情况选 择。 需要说明的是, 小区信号质量越差, 则选择较小的发送周期。
场景三: 根据所述小区信号质量生成所述参考信号的发送周期和带宽
I Ft自、。
具体的, 一种可能的实现方式为: 协议规定参考信号几个可选的带宽 信息, 并且给出了几个可选的发送周期, 此时, 基站可以根据小区信号质 量选择发送周期和带宽信息。
需要说明的是, 参考信号的带宽信息和发送周期也可以都是定值, 此 时基站不需要生成带宽信息和 /或发送周期,而是从基站的存储介质中获得 预置的带宽信息和发送周期。
优选的, 参照图 9, 歩骤 101的一种可行的实现方式为:
歩骤 101a、根据所述频率偏移量选择对用于承载所述参考信号的资源 单位 RE的频域位置进行频率偏移处理。
参照图 9, 歩骤 102的一种可行的实现方式为:
歩骤 102a、根据所述参考信号的发送周期和带宽信息, 在每个所述参 考信号的发送周期, 在相应的所述 RE的发送位置发送所述参考信号。
优选地, 由于基站在某些 PRB 上调度数据时, 也会对其他小区的基 站发送的参考信号造成干扰, 因此, 为了避免这种干扰对于 RRM测量精 度的影响, 下面给出一种优化的实现方式:
在所述参考信号的发送周期和带宽信息对应的 OFDM 符号上仅包含 用于发送所述参考信号的所述 RE。
具体的, 可以参照图 4, 假设有三个相邻小区, 每个小区的系统带宽 为 50个 PRB。确定参考信号发送的周期为 40ms发送一次, 参考信号发送 的带宽是系统带宽位于中间的 6个 PRB。 这样三个相邻小区都每隔 40ms 发送一次参考信号, 并且发送在系统带宽中间的 6个 PRB。 将上述信息通 知 UE之后, UE只在中间 6个 PRB进行 RRM测量。 而在这 6个 PRB上 与带宽信息对应的 OFDM 符号上仅包含用于发送所述参考信号的所述 RE , 不发送其他数据或信号, 而在这 6个 PRB上的其他 OFDM符号上可 以包含也可以不包含其他数据或参考信号。 从而避免了由于调度其他数据 而对其他小区基站的参考信号产生干扰。
歩骤 100的一种可行的实现方式为:
歩骤 100a、根据所述小区标识, 在关系表中获取与所述小区标识对应 的所述频率偏移量和至少一个所述天线端口; 其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
进一歩的, 该关系表中的所述小区标识与所述频率偏移量的对应关系 可以通过如下公式 (1 ) 获得:
Vshift = A mod6 ( 1 )
其中, 所述 ^½为频率偏移量, N 为所述小区标识。
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识, 所 述 N是一个正整数, 例如 3或者 4。 需要说明的是, 若采用上述公式 (2 ) 则获得的^ ^可以为 0或 2, 采 用上述公式 (3 ) 获得的 P可以为 0、 1、 2、 3中的一个。
具体参照图 5, 若两个相邻小区的 id分别是 0和 6, 那么根据公式 1 ) 计算出来的 frequency shift是相同的。 两个相邻小区按照现有技术发送的 参考信号的 RE会发生碰撞,造成测量精度的下降。而在获得 frequency shift 基础上, 根据公式 2 ) 其中可知: cell id 0使用 AP0进行发送, 而 cell id 6 使用 AP2进行发送。则参照图 5,相邻小区发送的参考信号不再发生碰撞。
需要说明的是,上述参考信号的天线端口的 RE与现有技术中 CRS的 天线端口的 RE可以是一一对应关系, 也可以是一对多对应关系。
其中, 一一对应关系指: 本实施例中的一个参考信号的天线端口的
RE就是对应一个 CRS的天线端口对应的 RE。例如可以规定参考信号 AP0 对应 CRS AP0; 参考信号 API对应 CRS AP1 ; 参考信号 AP2对应 CRS AP2; 参考信号 AP3对应 CRS AP3。 那么 cell id=0使用参考信号 AP0 进行发送, 则参考信号 AP0对应 CRS AP0, 使用 CRS AP0的 RE。
一对多对应关系指: 本实施例中的一个参考信号的天线端口的 RE可 以对应多个 CRS的天线端口对应的 RE。例如可以规定参考信号 AP0对应 CRS AP0; 参考信号 API对应 CRS API ; 参考信号 AP2对应 CRS的 AP2和 AP3 (—对多) 。 这样的好处是, 如果是一一对应的关系, 那么参 考信号 AP2对应 CRS AP2 , 根据现有技术的设置, CRS AP2在一个 PRB 内的 RE数是 4个, 少于参考信号 AP0和 AP1。 采用一对多的对应方式, 参考信号 AP2包括了 CRS AP2和 AP3的 RE,这样一个 PRB内就包括了 8个 RE, 达到了和 AP0, API相同的密度, 从而提高了 RRM测量精度。
需要说明的是, 上述公式 (1 ) 、 公式 (2 ) 以及公式 (3 ) 仅作为示 例对本实施例进行说明, 获取频率偏移量和天线端口的方式可以不限定予
上述方式, 只要能够根据小区标识得到频率偏移量、 天线端口与该小区标 识具有特定的对应关系, 保证相邻的小区之间的基站采用的频率偏移量、 天线端口彼此不相同即可。
优选地, 当基站具有 N个天线端口时, 根据图 3所示的方案, 基站可 以选择多个天线端口进行参考信号的传输, 具体的, 基站最多能够选择 n 个天线端口, 其中, n N。 从而优化各个基站之间发送参考信号的传输方 式, 避免不同基站的参考信号碰撞, 进一歩提高了 RRM测量精度。
进一歩的, 对于基站采用多个天线端口传输参考信号的方案, 获取多 个天线端口的方式可以为:
若需要至少两个用于发送参考信号的天线端口, 则在确定一个所述天 线端口的标识后, 根据所述天线端口的标识确定其他天线端口的标识。
用两个天线端口, 则另一个天线端口的标识可以通过如下公式 (4 ) 获得:
照公式 (4 ) 可知, 在基站获得一个天线 端口的标识后, 其他天线端口的标识可以通过在已知的天线端口标识加 " 1 " 的方式获得。 优选地, 一个 PRB内, 将现有技术中 AP2和 AP3的 RE数量增加至 8个。 参照图 6, 其中, 左侧是现有技术中的 CRS的 4个 AP的 RE映射 图。可以看出, AP0和 API在一个 PRB内占据了 8个 RE, 而 AP2和 AP3 占据了 4个 RE。 由于 RE数量减半, 所以基于 AP2和 AP3进行 RRM测 量的精度相对于基于 AP0和 API会差。
右侧为本发明实施例提供的用来发射参考信号的 4个 AP的 RE映射 图, 其中, AP2和 AP3占据的 RE变为 8个, 这样保证了相同的 RE密度, 从而提高了 RRM测量的精度。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分歩骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读
取存储介质中, 该程序在执行时, 执行包括上述方法实施例的歩骤; 而前述 的存储介质包括: ROM、 RAM,磁碟或者光盘等各种可以存储程序代码的介 质。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。
Claims
1、 一种发送参考信号的装置, 其特征在于, 包括:
处理模块, 用于根据小区标识确定频率偏移量和至少一个用于发送参 考信号的天线端口; 根据频率偏移量和至少一个用于发送参考信号的天线 端口确定资源单位 RE的发送位置,所述 RE的发送位置包含所述 RE的时 域发送位置和所述 RE的频域发送位置;
发送模块, 用于根据所述 RE的发送位置发送所述参考信号。
2、 根据权利要求 1 所述的装置, 其特征在于, 所述处理模块, 还用 于在根据小区标识确定频率偏移量和至少一个用于发送参考信号的天线 端口之前,获取所述参考信号的发送周期和带宽信息中的至少一个;其中, 所述参考信号的带宽信息用于指示所述 RE的频域发送位置。
3、 根据权利要求 2 所述的装置, 其特征在于, 所述处理模块用于获 取所述参考信号的发送周期和带宽信息中的至少一个具体包括:
所述处理模块, 具体用于根据从网络控制设备发送的通知消息, 获取 所述参考信号的发送周期和带宽信息中的至少一个; 或者,
根据用户设备 UE上报的小区信号质量, 生成所述参考信号的发送周 期和带宽信息中的至少一个。
4、 根据权利要求 3 所述的装置, 其特征在于, 所述处理模块, 具体 用于若所述参考信号的发送周期为预置的固定周期, 则根据所述 UE上报 的小区信号质量生成所述参考信号的带宽信息; 或者,
所述处理模块, 具体用于若所述参考信号的带宽信息为预置的固定带 宽信息, 则根据所述 UE上报的小区信号质量生成所述参考信号的发送周 期; 或者,
所述处理模块, 具体用于根据所述 UE上报的小区信号质量生成所述 参考信号的发送周期和带宽信息。
5、 根据权利要求 2-4任意一项所述的装置, 其特征在于, 所述发送模 块, 具体用于根据所述参考信号的发送周期和带宽信息, 在每个所述参考 信号的发送周期, 在相应的所述 RE的发送位置发送所述参考信号。
6、 根据权利要求 2-5任意一项所述的装置, 其特征在于, 还包括: 在所述参考信号的发送周期和带宽信息对应的正交频分复用 OFDM
符号上仅包含用于发送所述参考信号的所述 RE。
7、 根据权利要求 2-6任意一项所述的装置, 其特征在于, 所述处理模 块, 还具体用于根据所述小区标识, 在关系表中获取与所述小区标识对应 的所述频率偏移量和至少一个所述天线端口;
其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
10、 根据权利要求 8或 9所述的装置, 其特征在于, 所述处理模块, 具体用于若需要至少两个用于发送参考信号的天线端口, 则在确定一个所 述天线端口的标识后, 根据所述天线端口的标识确定其他天线端口的标
11、 一种发送参考信号的装置, 其特征在于, 包括:
处理器, 用于根据小区标识确定频率偏移量和至少一个用于发送参考 信号的天线端口; 根据频率偏移量和至少一个用于发送参考信号的天线端 口确定资源单位 RE的发送位置,所述 RE的发送位置包含所述 RE的时域 发送位置和所述 RE的频域发送位置;
发射器, 用于根据所述 RE的发送位置发送所述参考信号。
12、 根据权利要求 11 所述的装置, 其特征在于, 所述处理器, 还用 于在根据小区标识确定频率偏移量和至少一个用于发送参考信号的天线 端口之前,获取所述参考信号的发送周期和带宽信息中的至少一个;其中,
所述参考信号的带宽信息用于指示所述 RE的频域发送位置。
13、 根据权利要求 12所述的装置, 其特征在于, 所述处理器用于获 取所述参考信号的发送周期和带宽信息中的至少一个具体包括:
所述处理器, 具体用于根据从网络控制设备发送的通知消息, 获取所 述参考信号的发送周期和带宽信息中的至少一个; 或者,
根据用户设备 UE上报的小区信号质量, 生成所述参考信号的发送周 期和带宽信息中的至少一个。
14、 根据权利要求 13 所述的装置, 其特征在于, 所述处理器, 具体 用于若所述参考信号的发送周期为预置的固定周期, 则根据所述 UE上报 的小区信号质量生成所述参考信号的带宽信息; 或者,
所述处理器, 具体用于若所述参考信号的带宽信息为预置的固定带宽 信息,则根据所述 UE上报的小区信号质量生成所述参考信号的发送周期; 或者,
所述处理器, 具体用于根据所述 UE上报的小区信号质量生成所述参 考信号的发送周期和带宽信息。
15、 根据权利要求 12-14任意一项所述的装置, 其特征在于, 所述发 射器, 具体用于根据所述参考信号的发送周期和带宽信息, 在每个所述参 考信号的发送周期, 在相应的所述 RE的发送位置发送所述参考信号。
16、 根据权利要求 12-15任意一项所述的装置, 其特征在于, 还包括: 在所述参考信号的发送周期和带宽信息对应的正交频分复用 OFDM 符号上仅包含用于发送所述参考信号的所述 RE。
17、 根据权利要求 12-16任意一项所述的装置, 其特征在于, 所述处 理器, 还具体用于根据所述小区标识, 在关系表中获取与所述小区标识对 应的所述频率偏移量和至少一个所述天线端口;
其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
18、 根据权利要求 11-16任意一项所述的装置, 其特征在于, 所述处 理器, 具体用于根据如下公式确定至少一个用于发送参考信号的天线端 口:
其中, 所述 p为所述天线端口的标识, 所述 N 为所述小区标识。
20、 根据权利要求 18或 19所述的装置, 其特征在于, 所述处理器, 具体用于若需要至少两个用于发送参考信号的天线端口, 则在确定一个所 述天线端口的标识后, 根据所述天线端口的标识确定其他天线端口的标
21、 一种发送参考信号的方法, 其特征在于, 包括:
根据小区标识确定频率偏移量和至少一个用于发送参考信号的天线 根据频率偏移量和至少一个用于发送参考信号的天线端口确定资源 单位 RE的发送位置,所述 RE的发送位置包含所述 RE的时域发送位置和 所述 RE的频域发送位置;
根据所述 RE的发送位置发送所述参考信号。
22、 根据权利要求 21 所述的方法, 其特征在于, 在所述根据小区标 识确定频率偏移量和至少一个用于发送参考信号的天线端口之前, 还包 括:
获取所述参考信号的发送周期和带宽信息中的至少一个; 其中, 所述 参考信号的带宽信息用于指示所述 RE的频域发送位置。
23、 根据权利要求 22所述的方法, 其特征在于, 所述获取所述参考 信号的发送周期和带宽信息中的至少一个, 包括:
根据从网络控制设备发送的通知消息, 获取所述参考信号的发送周期 和带宽信息中的至少一个; 或者,
根据用户设备 UE上报的小区信号质量, 生成所述参考信号的发送周 期和带宽信息中的至少一个。
24、 根据权利要求 23所述的方法, 其特征在于, 所述生成所述参考 信号的发送周期和带宽信息中的至少一个, 包括:
若所述参考信号的发送周期为预置的固定周期, 则根据所述 UE上报 的小区信号质量生成所述参考信号的带宽信息; 或者,
若所述参考信号的带宽信息为预置的固定带宽信息, 则根据所述 UE 上报的小区信号质量生成所述参考信号的发送周期; 或者,
则根据所述 UE上报的小区信号质量生成所述参考信号的发送周期和 带宽信息。
25、 根据权利要求 22-24任意一项所述的方法, 其特征在于, 所述通 过至少一个所述天线端口在所述 RE发送所述参考信号在所述 RE通过所 述天线端口发送所述参考信号, 包括:
根据所述参考信号的发送周期和带宽信息, 在每个所述参考信号的发 送周期, 在相应的所述 RE的发送位置发送所述参考信号。
26、根据权利要求 22-25任意一项所述的方法, 其特征在于, 还包括: 在所述参考信号的发送周期和带宽信息对应的正交频分复用 OFDM 符号上仅包含用于发送所述参考信号的所述 RE。
27、 根据权利要求 22-26任意一项所述的方法, 其特征在于, 所述根 据小区标识确定频率偏移量和至少一个用于发送参考信号的天线端口, 包 括:
根据所述小区标识, 在关系表中获取与所述小区标识对应的所述频率 偏移量和至少一个所述天线端口;
其中, 所述关系表包含所述小区标识与所述频率偏移量的对应关系, 以及所述小区标识与至少一个所述天线端口的对应关系。
30、 根据权利要求 28或 29所述的方法, 其特征在于, 还包括: 若需要至少两个用于发送参考信号的天线端口, 则在确定一个所述天 线端口的标识后, 根据所述天线端口的标识确定其他天线端口的标识。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201480035210.2A CN105432106A (zh) | 2014-07-15 | 2014-07-15 | 发送参考信号的装置及方法 |
PCT/CN2014/082258 WO2016008101A1 (zh) | 2014-07-15 | 2014-07-15 | 发送参考信号的装置及方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2014/082258 WO2016008101A1 (zh) | 2014-07-15 | 2014-07-15 | 发送参考信号的装置及方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016008101A1 true WO2016008101A1 (zh) | 2016-01-21 |
Family
ID=55077803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2014/082258 WO2016008101A1 (zh) | 2014-07-15 | 2014-07-15 | 发送参考信号的装置及方法 |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN105432106A (zh) |
WO (1) | WO2016008101A1 (zh) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018127138A1 (zh) * | 2017-01-05 | 2018-07-12 | 华为技术有限公司 | 一种参考信号配置的方法、基站、用户设备和系统 |
WO2018126834A1 (zh) * | 2017-01-06 | 2018-07-12 | 中兴通讯股份有限公司 | 一种参考信号的传输方法及装置、存储介质 |
CN109150770A (zh) * | 2017-06-16 | 2019-01-04 | 华为技术有限公司 | 一种参考信号的发送、接收方法及装置 |
CN110447200A (zh) * | 2017-04-01 | 2019-11-12 | 华为技术有限公司 | 传输dmrs的方法和装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106301688B (zh) * | 2016-08-30 | 2020-01-03 | 吉林大学 | 一种prach抗干扰技术中支持小区间联合检测的方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101340227A (zh) * | 2008-08-15 | 2009-01-07 | 中兴通讯股份有限公司 | 下行参考信号的发送方法和装置 |
CN102647790A (zh) * | 2011-02-18 | 2012-08-22 | 华为技术有限公司 | 参考信号的发送、接收方法及装置 |
CN103024751A (zh) * | 2011-09-26 | 2013-04-03 | 华为技术有限公司 | 干扰控制方法和设备 |
KR20130087972A (ko) * | 2012-01-30 | 2013-08-07 | 주식회사 팬택 | 협력형 다중 셀 통신시스템에서 rrm측정 방법 및 그 송수신 포인트, 그 단말 |
CN103314614A (zh) * | 2011-01-07 | 2013-09-18 | 华为技术有限公司 | 参考信号传输和接收的方法和设备 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101610101B (zh) * | 2008-06-16 | 2013-02-27 | 中兴通讯股份有限公司 | 一种下行专用导频的跳频方法 |
CN102282899B (zh) * | 2009-04-24 | 2014-01-01 | 华为技术有限公司 | 产生参考信号的方法 |
US8861389B2 (en) * | 2010-07-09 | 2014-10-14 | Qualcomm Incorporated | TTL operations for small RB assignments |
WO2012044227A1 (en) * | 2010-10-01 | 2012-04-05 | Telefonaktiebolaget L M Ericsson (Publ) | Methods providing aided signal synchronization and related network nodes and devices |
-
2014
- 2014-07-15 WO PCT/CN2014/082258 patent/WO2016008101A1/zh active Application Filing
- 2014-07-15 CN CN201480035210.2A patent/CN105432106A/zh not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101340227A (zh) * | 2008-08-15 | 2009-01-07 | 中兴通讯股份有限公司 | 下行参考信号的发送方法和装置 |
CN103314614A (zh) * | 2011-01-07 | 2013-09-18 | 华为技术有限公司 | 参考信号传输和接收的方法和设备 |
CN102647790A (zh) * | 2011-02-18 | 2012-08-22 | 华为技术有限公司 | 参考信号的发送、接收方法及装置 |
CN103024751A (zh) * | 2011-09-26 | 2013-04-03 | 华为技术有限公司 | 干扰控制方法和设备 |
KR20130087972A (ko) * | 2012-01-30 | 2013-08-07 | 주식회사 팬택 | 협력형 다중 셀 통신시스템에서 rrm측정 방법 및 그 송수신 포인트, 그 단말 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018127138A1 (zh) * | 2017-01-05 | 2018-07-12 | 华为技术有限公司 | 一种参考信号配置的方法、基站、用户设备和系统 |
CN108282288A (zh) * | 2017-01-05 | 2018-07-13 | 华为技术有限公司 | 一种参考信号配置的方法、基站、用户设备和系统 |
CN108282288B (zh) * | 2017-01-05 | 2021-01-15 | 华为技术有限公司 | 一种参考信号配置的方法、基站、用户设备和系统 |
WO2018126834A1 (zh) * | 2017-01-06 | 2018-07-12 | 中兴通讯股份有限公司 | 一种参考信号的传输方法及装置、存储介质 |
CN110447200A (zh) * | 2017-04-01 | 2019-11-12 | 华为技术有限公司 | 传输dmrs的方法和装置 |
CN110447200B (zh) * | 2017-04-01 | 2021-06-15 | 华为技术有限公司 | 传输dmrs的方法和装置 |
US11265127B2 (en) | 2017-04-01 | 2022-03-01 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting DMRS |
US11777683B2 (en) | 2017-04-01 | 2023-10-03 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting DMRS |
CN109150770A (zh) * | 2017-06-16 | 2019-01-04 | 华为技术有限公司 | 一种参考信号的发送、接收方法及装置 |
CN109150770B (zh) * | 2017-06-16 | 2023-02-03 | 华为技术有限公司 | 一种参考信号的发送、接收方法及装置 |
Also Published As
Publication number | Publication date |
---|---|
CN105432106A (zh) | 2016-03-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10555292B2 (en) | Method for processing enhanced physical downlink control channel, network-side device, and user equipment | |
US11452115B2 (en) | User equipment (UE) and methods for vehicle-to-vehicle (V2V) sidelink communication in accordance with a short transmission time interval (TTI) | |
CN107005377B (zh) | 用于发送移动性信号的方法和相关网络节点及无线设备 | |
JP6478254B2 (ja) | ネットワークの適応および発見のための装置、ネットワーク、および方法 | |
KR101689490B1 (ko) | 셀 핸드오버 및 재구성을 위한 방법 및 장치 | |
US9794946B2 (en) | Network assisted interference mitigation | |
US10314089B2 (en) | Method performed by a user equipment, method performed by an enodeb, user equipment and enodeb | |
US10117128B2 (en) | Signal transmission method and device | |
EP3065427B1 (en) | Radio base station, user terminal, and radio communication method | |
WO2019138500A1 (ja) | ユーザ端末及び無線通信方法 | |
WO2016008101A1 (zh) | 发送参考信号的装置及方法 | |
WO2013135944A1 (en) | Common reference signal configuration for carrier aggregation | |
JP6679733B2 (ja) | ワイヤレス通信の方法およびシステム、ならびにデバイス | |
WO2014056153A1 (en) | Control channel configuration for stand-alone new carrier type | |
WO2014043851A1 (zh) | 控制信息处理方法及终端、基站 | |
CN101854656A (zh) | 多载波系统下测量snpl的方法、rnc和多载波终端 | |
KR102228469B1 (ko) | 측정 신호 전송 방법 및 네트워크 장치 | |
EP3257311B1 (en) | Method and apparatus for reducing processing delay | |
KR20230030514A (ko) | 통신 시스템에서 인터-ue 조정 정보 공유 방법 및 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201480035210.2 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14897815 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14897815 Country of ref document: EP Kind code of ref document: A1 |