WO2012062227A2 - 发送测量参考信号srs的方法、装置和系统 - Google Patents
发送测量参考信号srs的方法、装置和系统 Download PDFInfo
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- WO2012062227A2 WO2012062227A2 PCT/CN2012/070251 CN2012070251W WO2012062227A2 WO 2012062227 A2 WO2012062227 A2 WO 2012062227A2 CN 2012070251 W CN2012070251 W CN 2012070251W WO 2012062227 A2 WO2012062227 A2 WO 2012062227A2
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- information bit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
Definitions
- Embodiments of the present invention relate to a wireless communication technology, and in particular, to a method, apparatus, and system for transmitting a sounding reference signal (hereinafter referred to as SRS).
- SRS sounding reference signal
- the uplink measurement reference signal is a signal transmitted by the terminal (User equipment; the following container: UE) to the base station, and the content of the signal is known both at the terminal and the base station.
- the base station can measure the wireless channel between the terminal and the base station and related transmission conditions.
- SRS is divided into two categories. The first category is called Periodic SRS and the other is called Dynamic ARP. Measurement reference signal (Aperiodic SRS).
- Periodic SRS When enabled, the terminal periodically and continuously sends SRS to the base station until it is terminated. In contrast, the aperiodic SRS does not transmit after being configured. When the base station needs to perform channel measurement, it passes the downlink control information.
- DCI Downlink control information; The following cylinder: DCI
- DCI Downlink control information
- the following cylinder: DCI triggers SRS, and the terminal sends one or more aperiodic SRSs after receiving the DCI.
- the SRS information bit may include one or more bits. The more bits, the more information can be transmitted, indicating more configuration, so the configuration is more flexible. For example, if there is only 1 bit in the SRS information bit of a DCI's aperiodic SRS, then it can only indicate whether the SRS is triggered or not, so all the parameters required to send the aperiodic SRS are configured at the upper layer.
- the SRS information bit contains 3 bits, Then a total of 8 configurations can be expressed, so that some parameters of the aperiodic SRS can be flexibly configured while triggering, for example, "000” means “do not trigger SRS", and "001” means “trigger SRS, use CSO, combO”” , and the application “111” means “trigger SRS, use CS7, combl” and so on.
- Embodiments of the present invention provide a method, an apparatus, and a system for transmitting a measurement reference signal SRS, which increase scheduling flexibility and enhance resource utilization.
- An embodiment of the present invention provides a method for transmitting a measurement reference signal SRS, including:
- the terminal And transmitting, to the terminal, downlink control information that carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes information indicating that the terminal re-performs the parameter configuration of the periodic SRS or indicates that the terminal performs cross- Carrier triggered dynamic aperiodic SRS information;
- the embodiment of the present invention further provides a method for transmitting a measurement reference signal SRS, including: receiving, by a terminal, downlink control information that is sent by a base station and carrying an SRS information bit, where the SRS information bit includes at least 2 bits, and the SRS information bit includes And the information indicating that the terminal re-performs the parameter configuration of the periodic SRS or the information that the terminal performs the cross-carrier triggering dynamic aperiodic SRS; the terminal sends the SRS according to the SRS information bit.
- the embodiment of the invention further provides a base station, including:
- a first sending module configured to send, to the terminal, downlink control information that carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes information indicating that the terminal re-performs the parameter configuration of the periodic SRS Or instructing the terminal to perform cross-carrier triggering dynamic aperiodic SRS information;
- a first receiving module configured to receive, by the terminal, the SRS according to the SRS information bit.
- An embodiment of the present invention provides a terminal, including: a receiving module, configured to receive downlink control information that is sent by the base station and carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes a parameter configuration or indication that indicates that the terminal re-periods periodic SRS The terminal performs information for triggering a dynamic aperiodic SRS across carriers;
- a second sending module configured to send an SRS according to the SRS information bit.
- the embodiment of the present invention provides a communication system, which includes the base station provided by the embodiment of the present invention and the terminal provided by the embodiment of the present invention.
- a method, an apparatus, and a system for transmitting a measurement reference signal SRS by using SRS information bits in a DCI, including information indicating that a terminal re-performs a periodic SRS parameter, or instructing the terminal to perform a cross-carrier triggering dynamic aperiodic
- the SRS information enables the DCI to be used not only for parameter configuration and triggering of aperiodic SRS, but also for implementing other functions such as re-performing periodic SRS parameter configuration, cross-carrier triggering dynamic aperiodic SRS, etc., thereby increasing scheduling. Flexibility, enhancing overall resource utilization.
- FIG. 1 is a flowchart of an embodiment of a method for transmitting an SRS according to the present invention
- FIG. 2 is a flowchart of another embodiment of a method for transmitting an SRS according to the present invention.
- FIG. 3 is a schematic diagram of a non-periodic SRS triggering according to an embodiment of the present invention
- FIG. 4 is a schematic structural diagram of an embodiment of a base station according to the present invention
- FIG. 5 is a schematic structural diagram of a terminal embodiment of the present invention.
- FIG. 6 is a schematic structural diagram of an embodiment of a communication system according to the present invention. detailed description
- the configuration and transmission process of periodic SRS and aperiodic SRS are introduced separately.
- the terminal can be configured by sending high-level signaling (RRC signaling).
- RRC signaling high-level signaling
- the base station notifies the terminal of the parameters in Table 1 through high layer signaling.
- the periodic SRS will be continuously sent according to these parameters until the base station notifies the terminal to stop transmitting through high layer signaling.
- the base station configures the SRS transmission parameters for the terminal through the high layer signaling, and the process is basically the same as the configuration periodic SRS described above.
- the parameters configured in it can be part of the parameters in Table 1, or all.
- the unconfigured parameters can be configured when the aperiodic SRS is triggered, which will improve the flexibility of the configuration.
- the terminal does not send SRS.
- the base station notifies the terminal to send the SRS through the DCI.
- the DCI is transmitted through a downlink physical layer control channel (PDCCH).
- PDCH downlink physical layer control channel
- the PDCCH In the process of triggering the aperiodic SRS, since the base station has previously sent some configuration parameters to the terminal through the high layer signaling, the PDCCH only needs to configure the remaining parameters to the terminal, and inform the terminal whether it is necessary to send the SRS.
- the DCI includes different types of control information, some for data transmission, and some for transmission rate.
- the control information for triggering the configuration of the aperiodic SRS is only one of the DCIs.
- the DCI carried in a PDCCH often includes multiple control signalings. Each control signaling is called an information bit, and different DCIs carried in different PDCCHs may include different information bits.
- Some DCIs have SRS information bits that trigger SRS, and other DCIs do not have SRS information bits, so there is no function to trigger SRS.
- parameter configuration can also be performed.
- the terminal After the terminal receives the DCI correctly, since some parameters are configured through the high-level signaling, the SRS information bit of the DCI is now added, and all the configuration parameters are obtained. Thereafter, the terminal sends an aperiodic SRS according to these parameters.
- An embodiment of the present invention provides a parameter configuration method for optimizing an uplink measurement reference signal.
- the base station may generate a DCI, where the DCI carries an SRS information bit, and the SRS information bit includes at least 2 bits, and the SRS information bit includes Performing information of parameter configuration of periodic SRS or information indicating that the terminal performs dynamic aperiodic SRS triggering across carriers, and transmitting information included in the DCL SRS information bits to the terminal will be further described in the following embodiments of the present invention, and the following embodiments
- the SRS information bits described in the information contain the same information.
- the base station sends the SRS to the terminal by sending the DCI to the terminal according to the SRS information bit carried in the DCI.
- part of the configuration can be used to configure and trigger the aperiodic SRS, and the remaining configurations can be used for other purposes, thereby increasing scheduling flexibility and enhancing overall resource utilization.
- FIG. 1 is a flowchart of a method for transmitting an SRS according to an embodiment of the present invention. As shown in FIG. 1, the method includes: Step 100: The base station sends a DCI carrying the SRS information bit to the terminal.
- the SRS information bits can represent multiple configurations.
- these configurations may be divided into several parts, and some configurations are still used for triggering and configuring aperiodic SRS, and the remaining configurations may be used to implement other functions, including, for example, reconfiguring periodic SRS parameters and cross-carrier non-carriers. Triggering of periodic SRS and so on.
- reconfiguring the parameters of the periodic SRS can more flexibly schedule SRS resources, such as temporarily suspending the transmission of periodic SRS several times, and using the saved resources for other purposes.
- the suspension means that the UE skips the periodic SRS that needs to be transmitted, and does not send the periodic SRS when the periodic SRS needs to be sent. Therefore, it can be considered as suspending the periodic SRS transmission.
- the triggering of the cross-carrier aperiodic SRS can increase the flexibility of SRS triggering in the carrier aggregation scenario.
- the SRS information bit may include information indicating that the terminal re-performs the parameter configuration of the periodic SRS, and may also include information indicating that the terminal performs dynamic aperiodic SRS triggering across the carrier, and each information may be preset by the base station and the terminal, or Can be configured through the system.
- the terminal After receiving the DCI, the terminal can identify the specific operation of the terminal by the terminal through the DCI by identifying the information set in the SRS information bit in the DCI, and can send the SRS to the base station according to the indication.
- the DCI can be sent to the terminal through the PDCCH.
- the base station Before transmitting the DCI, the base station can set the SRS information bits in the DCI to indicate the specific operation of the terminal. For example, if the base station needs to instruct the terminal to perform periodic SRS transmission through the DCI, the SRS information bit may be set to preset corresponding information; if the base station needs to instruct the terminal to perform cross-carrier dynamic aperiodic SRS transmission through the DCI, The SRS information bit can be set to a corresponding information set in advance. After the base station sets the SRS information bit, the generated DCI is sent to the terminal through the PDCCH.
- Step 101 The base station receives an SRS sent by the terminal according to the SRS information bit.
- the terminal After receiving the DCI, the terminal learns the operation of the base station by identifying the information of the SRS information bit. In response, the SRS transmission process can be performed in accordance with the instruction.
- the method for transmitting an SRS defines a partial configuration in a plurality of configurations of SRS information bits in a DCI, where the SRS information bit includes information indicating that the terminal re-performs a parameter configuration of a periodic SRS or indicates the
- the terminal performs the information of the dynamic aperiodic SRS triggered by the cross-carrier, so that the DCI can be used not only for the parameter configuration and triggering of the aperiodic SRS, but also for implementing other functions, such as re-performing the periodic SRS parameter configuration, cross-carrier triggering dynamics.
- Aperiodic SRS, etc. thereby increasing scheduling flexibility and enhancing overall resource utilization.
- FIG. 2 is a flowchart of another embodiment of a method for transmitting an SRS according to the present invention. As shown in FIG. 2, the method includes:
- Step 200 The terminal receives the DCI that is sent by the base station and carries the SRS information bit, where the SRS information bit includes at least 2 bits, and the SRS information bit may include a parameter configuration indicating that the terminal re-periods periodic SRS or indicates the The terminal performs information for triggering dynamic aperiodic SRS across carriers.
- the method embodiment of the present invention introduces the solution of the present invention from the terminal side.
- the terminal receives the DCI sent by the base station, and the DCI is obtained by the base station by setting information of the SRS information bits in the DCI according to the foregoing method embodiment, and is sent by the base station to the terminal through the PDCCH.
- the DCI carries an SRS information bit, and the SRS information bit includes at least 2 bits to ensure that the SRS information bit can include multiple configurations.
- the SRS information bits may contain information indicating that the terminal re-performs the parameter configuration of the periodic SRS or information indicating that the terminal performs dynamic aperiodic SRS across carriers.
- Step 201 The terminal sends an SRS according to the SRS information bit carried in the downlink control information.
- the terminal After receiving the DCI, the terminal acquires the information of the SRS information bit, learns the operation indication of the base station, and sends the SRS according to the operation instruction of the base station. If the operation indication of the base station is to re-configure the parameters of the periodic SRS, the terminal will reconfigure the parameters of the periodic SRS according to the indication, and perform periodic SRS transmission according to the new parameter. If the operation indication of the base station triggers the dynamic non-periodic SRS across the carrier, the terminal will trigger the aperiodic SRS on the other carrier according to the indication.
- the method for transmitting SRS provided by the embodiment of the present invention may be based on the SRS information bit in the DCI.
- the definition, according to the indication can be used not only for parameter configuration and triggering of the aperiodic SRS, but also for implementing other functions such as re-performing the parameter configuration of the periodic SRS, triggering the dynamic aperiodic SRS across the carrier, etc., thereby increasing scheduling flexibility. Enhance overall resource utilization.
- the parameter configuration of the periodic SRS may be implemented in the following manner.
- the parameter of the periodic SRS is configured to change the parameter of the periodic SRS transmission, that is, the terminal is indicated.
- the information for re-performing the parameter configuration of the periodic SRS includes any one of the following or a combination thereof:
- This information is information indicating that the terminal changes the SRS cyclic shift (CS) or SRS comb (comb) used in transmitting the periodic SRS.
- the base station can instruct the terminal to change the used CS by using the DCI.
- the base station can change the parameter CS of the terminal originally configured by the DCI to mod(x+4, 8) (x+4).
- the terminal changes CS to mod(x+4, 8) (x+4 and then modulo 8); or the base station can change the parameter configuration comb originally configured by the terminal through DCI.
- the transmission of SRSs of different users can be scheduled on the same time-frequency resources.
- the base station can allocate more SRS to the same resource, for example 20 (both periodic and non-periodic), as long as only less than 16 SRSs are triggered at a time. It is possible that no resource conflicts occur (no collisions occur), but this requires the base station to select the appropriate CS and comb for the user through DCI.
- the CS or the comb of the periodic SRS can be changed by using the DCI.
- the advantage is that it is possible to use a certain periodic SRS Comb or CS after a certain non-periodic SRS is triggered in a certain subframe, and the periodicity can be made through the DCI.
- the SRS changes the comb/CS so that both parties can send smoothly, avoiding the collision of the periodic SRS transmission with the SRS sent by other users.
- This information is information indicating that the terminal changes the period used in transmitting the periodic SRS. Assuming that the period used by the periodic SRS is N1, the base station can instruct the terminal to change the period of transmission through the DCI. For example, after receiving the DCI, the terminal switches the period to N2. This can be based on the specific transmission Select which period to use, for example, a relatively short period is required when periodic measurements are required, and a long period is used when frequent periodic measurements are not required.
- This information is information indicating that the terminal changes the bandwidth used in transmitting the periodic SRS. Assuming that the bandwidth used by the periodic SRS is W1, the base station can instruct the terminal to change the bandwidth through the DCI. For example, after receiving the DCI, the terminal switches the bandwidth to W2. Thus, if the terminal is more suitable for broadband measurement, the base station can instruct the terminal to switch to a wideband SRS, otherwise the base station can use the DCI to instruct the terminal to switch to a narrowband SRS.
- This information is information indicating that the terminal changes the frequency hopping bandwidth used in transmitting the periodic SRS. Assuming that the previous hopping bandwidth of the periodic SRS is HI, the base station can instruct the terminal to change the hop bandwidth by DCI. For example, after receiving the DCI, the terminal switches the FM bandwidth to H2. In this way, the base station can flexibly select the hopping bandwidth for the terminal according to the service requirement.
- the parameter configuration of the periodic SRS may also temporarily suspend N periodic SRS transmissions, and the number N of temporary suspensions may be configured in Table 2 through high layer signaling.
- SRS transmission time includes the period of SRS transmission, and the starting time point
- SRS frequency domain location The frequency domain location of the SRS transmission.
- the SRS may adopt the frequency hopping method (the SRS is transmitted in different frequency bands at different transmission moments). This allows you to measure a wider frequency band with multiple transmissions.
- SRS cyclic shift SRS transmission multiplies the original signal sequence by a cyclic shift, there are 8 cyclic shifts, and the eNB configuration needs to specify which cyclic shift to use.
- SRS comb (comb) SRS transmission there are two sets of subcarriers can be selected, these two sets of subcarriers are called comb 0 and comb 1 , the eNB configuration needs to explain which one to use Ring shift
- the information indicating that the terminal re-performs the parameter configuration of the periodic SRS may include information indicating that the terminal pauses to send the periodic SRS, for example, instructing the terminal to suspend the periodic SRS according to the number of suspended transmissions configured in the high layer signaling, after receiving the DCI.
- a terminal is configured to transmit periodic SRS, and then continuously sends SRS periodically.
- the base station may send a DCI to the terminal, and notify it to suspend N times of transmission. In this way, since the terminal suspends N transmissions, the corresponding time-frequency resources can be used for other purposes. For example, the base station can schedule other users to send aperiodic SRS on the resource.
- the information indicating that the terminal re-performs the parameter configuration of the periodic SRS may also be information indicating that the terminal pauses to send the periodic SRS, and triggers and configures the aperiodic SRS transmission.
- the information may indicate that the terminal pauses to send the periodic SRS according to the number of suspended transmissions configured in the high layer signaling, and triggers the aperiodic SRS according to the configuration parameter of the high layer signaling.
- the configuration of the aperiodic SRS transmission here can be considered as the reconfiguration of the aperiodic SRS transmission in the case of the existing aperiodic SRS transmission configuration.
- the information may be used to indicate that the terminal pauses the periodic SRS that is sent N times after receiving the DCI, and simultaneously triggers the information of the aperiodic SRS.
- the number of times that the acyclic SRS is triggered is configured through the high-layer signaling. As shown in Table 2, the frequency band is the same as the periodic SRS that is suspended. However, the time is consistent with the configuration of the high-level signaling for the aperiodic SRS.
- the information indicating that the terminal re-performs the parameter configuration of the periodic SRS may further indicate that the terminal pauses to send the periodic SRS, and triggers and configures the aperiodic SRS transmission, and the CS and/or in the aperiodic transmission
- the comb has information of an offset of length N.
- the information may indicate that the terminal pauses the sending week according to the number of suspended transmissions configured in the high layer signaling since receiving the DCI.
- the CS used by the aperiodic SRS triggered at this time is mod ( ⁇ + ⁇ , 8 ), where N is an offset.
- the configuration of the aperiodic SRS transmission herein can be considered as the reconfiguration of the aperiodic SRS transmission in the case of the existing aperiodic SRS transmission configuration.
- FIG. 3 is a schematic diagram of a non-periodic SRS trigger according to an embodiment of the present invention.
- the horizontal axis is time and the vertical axis is frequency.
- the shaded portion of the slash is a periodic SRS.
- the base station triggers the PDCCH transmission to the terminal, and the terminal may need several subframes (for example, 4 subframes) to demodulate the information carried by the DCI, and the terminal sends the information according to the base station.
- the SRS information bit is to suspend the transmission of N1 (here 1) periodic SRS, that is, the periodic SRS transmission is suspended once in the n+kp subframe in FIG.
- the figure is represented by a horizontal line, and according to the SRS information bit, the N2 (here 1) aperiodic SRS transmission is triggered at the same time, and the transmission time is the time configured according to the aperiodic SRS, that is, in FIG.
- Aperiodic SRS transmission is performed at the n+ka subframe (indicated by vertical lines in Fig. 3).
- the sending time is a configuration according to aperiodic SRS transmission, that is, the UE performs aperiodic SRS transmission on the n+ka subframe; bandwidth and frequency domain.
- the location is in accordance with the configuration of the periodic SRS that is suspended, that is, the bandwidth of the aperiodic transmission and the location of the frequency domain transmitted by the UE on the n+ka subframe are the same as the periodic SRS transmission suspended on the n+ka subframe.
- the remaining parameters can be transmitted according to the high-level configuration, which can be configured according to the periodic SRS transmission configuration parameters or the non-periodic SRS transmission configuration parameters.
- one or all of the parameters CS and comb may be added with an offset on the basis of the periodic SRS configuration.
- the previously configured CS is X, and the aperiodic SRS triggered at this time is triggered.
- the CS used is mod ( ⁇ + ⁇ , 8 ), where ⁇ is the offset.
- the information indicating that the terminal performs the cross-carrier triggering dynamic aperiodic SRS further includes indicating the target carrier identifier configured by the terminal according to the high layer signaling, as shown in Table 2, after receiving the DCI. , performing cross-carrier triggering dynamic aperiodic SRS information.
- Cross-carrier touch The transmission is mainly applied in a carrier aggregation scenario. In this scenario, a terminal can transmit data on multiple uplink carriers.
- the PDCCH has a binding relationship with the uplink carrier. For example, if a terminal has two uplink carriers, the PDCCH and the two carriers have different binding relationships.
- the PDCCH can only trigger the sending of the aperiodic SRS on the first carrier.
- the embodiment introduces cross-carrier triggering. If the terminal receives the configured PDCCH, the SRS should be sent on the second carrier. In this way, the SRS triggering and scheduling flexibility can be increased, because the prior art can only trigger the SRS on the local carrier, and the embodiment of the present invention can support triggering the SRS on other carriers. Further, if there are two other carriers in addition to the first carrier, the target carrier indicating the cross-carrier needs to be set in Table 2 through high-layer signaling in advance, as shown in Table 2, the information of the SRS information bits. Only cross-carrier triggering is sufficient.
- a DCI including at least 2 bits may represent multiple configurations.
- the SRS information bits in the DCI may further include information for triggering the terminal to send the aperiodic SRS, that is, Trigger and configure the aperiodic SRS on this carrier; and use other configurations to implement the other functions described above.
- Table 3 A specific example is shown in Table 3 below, which dynamically configures some parameters of the aperiodic SRS.
- the DCI since the DCI has 3 bits, it can represent 8 configurations.
- "000” means no terminal processing is required; "001-100” is used to configure dynamic aperiodic SRS; "101-110” means reconfiguration of periodic SRS; "111” means Perform cross-carrier SRS triggering.
- the terminal After receiving the DCI, the terminal performs the next operation according to the information carried on the DCI. If it is "000”, no action is taken; if it is "001-100", the aperiodic SRS is triggered, and the aperiodic SRS is configured according to the corresponding information; if it is "101-110", the periodicity is reconfigured. SRS; If "111", the dynamic aperiodic SRS is sent on the corresponding carrier.
- the SRS information bit in the DCI may also include various possibilities. Only examples of configuring CS and comb are given in Table 3. Other possibilities include reconfiguration of other parameters in Table 2, such as changing Bandwidth, change the frequency domain location, etc.
- a portion of the SRS information bits capable of representing a plurality of configurations is used as other uses in addition to configuring and triggering the aperiodic SRS, thereby increasing scheduling flexibility and enhancing overall resource utilization.
- the base station includes a first sending module 11 and a first receiving module 12, where the first sending module 11 is configured to send, to the terminal, an SRS information bit.
- the DCI, the SRS information bit includes at least 2 bits, and the SRS information bit includes information indicating that the terminal re-performs the parameter configuration of the periodic SRS or information indicating that the terminal performs dynamic aperiodic SRS triggering across carriers; 12 for receiving terminals according to SRS
- the information bits are sent to the SRS.
- the SRS information bits can represent multiple configurations, and the configurations can be divided into several. A part of the configuration is still used for the triggering and configuration of the aperiodic SRS, and the remaining configurations can be used to implement other functions, such as including reconfiguring the parameters of the periodic SRS and triggering the cross-carrier aperiodic SRS.
- the base station generates a DCI including the SRS information bit with the identification function through the first sending module 11, and sends the DCI to the terminal.
- the terminal After receiving the DCI, the terminal can obtain the operation indication of the base station by identifying the information of the SRS information bit, and then the SRS can be sent.
- the base station may receive, by the first receiving module 12, the SRS returned by the terminal according to the SRS information bit.
- the first sending module 11 includes a generating unit and a sending unit, and the generating unit may perform setting of different information, for example, parameter configuration of periodic SRS, dynamic aperiodic SRS of cross-carrier triggering, and parameters of aperiodic SRS.
- the configuration unit is implemented by the following sub-modules included in the following.
- the generating unit includes any one or combination of the following sub-modules: the first generating sub-module is configured to generate downlink control information that carries the SRS information bits, where The SRS information bit includes at least 2 bits, and the SRS information bit includes information indicating that the terminal changes the SRS cyclic shift used in transmitting the periodic SRS;
- a second generation submodule configured to generate downlink control information that carries an SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes an SRS comb that is used by the terminal to change a transmission periodic SRS Information;
- a third generation submodule configured to generate downlink control information that carries an SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes information indicating that the terminal changes a period used in sending a periodic SRS. ;
- a fourth generation submodule configured to generate downlink control information that carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes information indicating that the terminal changes the bandwidth used in sending the periodic SRS. ;
- a fifth generation submodule configured to generate downlink control information carrying SRS information bits, where the SRS The information bit includes at least 2 bits, and the SRS information bit includes information indicating that the terminal changes the frequency hopping bandwidth used in transmitting the periodic SRS;
- a sixth generation sub-module configured to generate downlink control information that carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes information indicating that the terminal suspends transmitting the periodic SRS; for example, Receiving the downlink control information, suspending the sending of the periodic SRS according to the number of suspended transmissions configured in the high layer signaling;
- a seventh generation submodule configured to generate downlink control information that carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes information indicating that the terminal performs dynamic aperiodic SRS across carriers. For example, after receiving the downlink control information, performing cross-carrier triggering dynamic aperiodic SRS information according to target carrier information configured in the high layer signaling;
- the eighth generation sub-module is configured to generate downlink control information that carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes information used to trigger the terminal to send the aperiodic SRS.
- a ninth generation sub-module configured to generate downlink control information that carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes the terminal to suspend transmission of the periodic SRS, and simultaneously according to the high-level letter
- the configuration parameters of the command trigger the information of the aperiodic SRS.
- a tenth generation sub-module configured to generate downlink control information that carries the SRS information bit, where the SRS information bit includes at least 2 bits, where the SRS information bit includes the terminal to suspend sending the periodic SRS, and trigger and configure the non- Periodic SRS transmission, and the cyclic shift and/or comb of the aperiodic transmission has information of an offset of length N compared to the periodic SRS.
- the base station provided by the present embodiment redefines part of the multiple configurations of the SRS information bits in the DCI according to actual requirements, so that the DCI can be used not only for parameter configuration and triggering of the aperiodic SRS, but also for implementing other functions.
- the parameter configuration of the periodic SRS is re-executed, and the dynamic aperiodic SRS is triggered across the carriers, thereby increasing scheduling flexibility and enhancing overall resource utilization.
- 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention. As shown in FIG.
- the terminal includes a receiving module 21 and a second sending module 22, where the receiving module 21 is configured to receive a DCI that is sent by a base station and carries an SRS information bit.
- the SRS information bit includes at least 2 bits, and the SRS information bit includes information indicating that the terminal re-performs the parameter configuration of the periodic SRS or information indicating that the terminal performs cross-carrier triggering dynamic aperiodic SRS; 22 is configured to send an SRS according to the SRS information bit.
- the base station sets the information of the SRS information bits in the DCI according to actual requirements, and generates a DCI, and then sends the DCI to the terminal through the PDCCH.
- the terminal receives the DCI through the receiving module 21, and then acquires information of the SRS information bit, and transmits the SRS according to the operation instruction of the base station by the second sending module 22.
- the terminal provided by the embodiment of the present invention may be based on the re-definition of the SRS information bits in the DCI, and may not only be used for parameter configuration and triggering of the aperiodic SRS according to the SRS information bit, but also may be used to implement other functions such as re-period periodic SRS.
- the parameter configuration, cross-carrier trigger dynamic aperiodic SRS, etc. thereby increasing scheduling flexibility and enhancing overall resource utilization.
- the communication system includes a base station 1 and a terminal 2, wherein the base station 1 and the terminal 2 are connected through a wireless network.
- the base station involved in the communication system can be redefined according to the actual requirements of the partial configuration of the multiple configurations of the SRS information bits in the DCI, so that the DCI can be used not only for parameter configuration and triggering of the aperiodic SRS, but also for the parameter configuration and triggering of the aperiodic SRS.
- Other functions such as re-period parameter configuration of periodic SRS, dynamic aperiodic SRS triggered by cross-carrier, etc., increase scheduling flexibility and enhance overall resource utilization.
- the base station and the terminal in the embodiments of the present communication system may be the base station and the terminal provided in the foregoing apparatus embodiments.
- the base station and the terminal in the device embodiment may implement the method embodiment provided by the foregoing embodiment of the present invention, and the communication system.
- For the process of the SRS triggering process refer to the process flow provided by the foregoing method embodiments, and details are not described herein again.
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Description
发送测量参考信号 SRS的方法、 装置和系统 本申请要求于 2010年 1 1月 12日提交中国专利局、 申请号为
201010550573.3、 发明名称为"发送测量参考信号 SRS的方法、 装置和系 统"的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明实施例涉及无线通信技术, 尤其涉及一种发送测量参考信号 ( sounding reference signal; 以下筒称: SRS ) 的方法、 装置和系统。 背景技术
上行测量参考信号是由终端(User equipment; 以下筒称: UE )向基站发 送的一种信号,该信号的内容在终端与基站都是已知的。基站接收到 SRS后, 可以对终端到基站之间的无线信道及相关传输条件进行测量。 在高级长期演 进( Long Term Evolution Advanced; 以下筒称: LTE-A )技术中, SRS分成 两类, 第一类称为周期性测量参考信号( Periodic SRS ) , 另一类称为动态非 周期性测量参考信号( Aperiodic SRS ) 。 周期性 SRS—旦启用, 终端会周期 性、 持续向基站发送 SRS , 直到被终止。 相比而言, 非周期 SRS在配置好之 后并不进行发送, 基站需要进行信道测量的时候, 会通过下行控制信息
( Downlink control information; 以下筒称: DCI )触发 SRS , 终端收到该 DCI 后才发送一次或多次非周期 SRS。
现有技术中, 如果 DCI支持非周期 SRS的触发, 那么其中必有一个 SRS 信息位。 该 SRS信息位可能包括一个或多个比特, 比特数越多则可以传递更 多的信息量,表示更多的配置,所以配置越灵活。例如,某 DCI的非周期 SRS 的 SRS信息位中只有 1比特, 那么只能表示触发还是不触发 SRS , 这样发送 非周期 SRS所需的所有参数都在高层配置好。 若该 SRS信息位包含 3比特,
那么总共可以表达 8种配置,那么就可以在触发的同时灵活地配置非周期 SRS 的部分参数, 例如应用 "000" 表示 "不触发 SRS" , 应用 "001" 表示 "触 发 SRS, 使用 CSO, combO" , 以及应用 "111"表示 "触发 SRS, 使用 CS7, combl" 等。
现有技术中,基站在通过 DCI触发 SRS的过程中,网络资源利用率比较低。 发明内容
本发明实施例提供一种发送测量参考信号 SRS的方法、 装置和系统, 增 加调度灵活性, 增强资源利用率。
本发明实施例提供一种发送测量参考信号 SRS的方法, 包括:
向终端发送携带有 SRS信息位的下行控制信息,所述 SRS信息位至少包 含 2比特,所述 SRS信息位包含指示所述终端重新进行周期性 SRS的参数配 置的信息或指示所述终端进行跨载波触发动态非周期 SRS的信息;
接收所述终端根据所述 SRS信息位发送的 SRS。
本发明实施例还提供一种发送测量参考信号 SRS的方法, 包括: 终端接收基站发送的、携带有 SRS信息位的下行控制信息, 所述 SRS信 息位至少包含 2比特,所述 SRS信息位包含指示所述终端重新进行周期性 SRS 的参数配置的信息或指示所述终端进行跨载波触发动态非周期 SRS的信息; 所述终端根据所述 SRS信息位发送 SRS。
本发明实施例还提供一种基站, 包括:
第一发送模块, 用于向终端发送携带有 SRS信息位的下行控制信息, 所 述 SRS信息位至少包含 2比特,所述 SRS信息位包含指示所述终端重新进行 周期性 SRS 的参数配置的信息或指示所述终端进行跨载波触发动态非周期 SRS的信息;
第一接收模块, 用于接收所述终端根据所述 SRS信息位发送 SRS。
本发明实施例提供一种终端, 包括:
接收模块, 用于接收基站发送的、 携带有 SRS信息位的下行控制信息, 所述 SRS信息位至少包含 2比特,所述 SRS信息位包含指示所述终端重新进 行周期性 SRS的参数配置或指示所述终端进行跨载波触发动态非周期 SRS的 信息;
第二发送模块, 用于根据所述 SRS信息位发送 SRS。
本发明实施例提供一种通信系统, 包括本发明实施例提供的基站以及本 发明实施例提供的终端。
本发明实施例提供的发送测量参考信号 SRS的方法、 装置和系统, 通过 对 DCI中 SRS信息位包括指示终端重新进行周期性 SRS的参数配置的信息 或指示所述终端进行跨载波触发动态非周期 SRS的信息,使得该 DCI不仅可 以用于非周期 SRS的参数配置和触发, 而且还可以用于实现其他功能例如重 新进行周期性 SRS的参数配置、跨载波触发动态非周期 SRS等,从而增加调 度灵活性, 增强整体的资源利用率。 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作一筒单地介绍, 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 不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明发送 SRS的方法一实施例流程图;
图 2为本发明发送 SRS的方法另一实施例流程图;
图 3为本发明实施例提供的一种非周期 SRS触发的示意图; 图 4为本发明基站实施例结构示意图;
图 5为本发明终端实施例结构示意图;
图 6为本发明通信系统实施例结构示意图。
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。
首先分别介绍周期性 SRS与非周期性 SRS的配置与发送过程。如果基站 需要终端发送周期性 SRS, 可以通过发送高层信令(RRC signaling )对终端 进行配置。 在配置过程中, 基站通过高层信令将如表 1 中的参数通知终端。 终端得到这些配置信息之后, 将按照这些参数持续不断地发送周期性 SRS, 直到基站通过高层信令通知终端停止发送。
表 1
如果基站需要终端发送非周期 SRS, 其过程所不同。 首先, 基站会通过 高层信令为终端配置 SRS传输参数,这一过程与上述的配置周期性 SRS基本
一样, 其中配置的参数可以是表 1 中参数的部分, 也可以是全部。 其中, 没 有配置的参数可以在触发非周期 SRS的时候再配置, 这样会提高配置的灵活 性。 高层信令配置完毕后, 终端并不发送 SRS。 其次, 当基站需要终端发送 SRS时, 基站会通过 DCI来通知终端发送 SRS。 DCI是通过下行物理层控制 信道(PDCCH )传输的。 在触发非周期 SRS的过程中, 由于基站已经通过高 层信令将部分配置参数提前发送给了终端, 那么 PDCCH 中只要把余下的参 数配置给终端, 并告知终端是否需要发送 SRS就可以了。
DCI包括不同种类的控制信息, 有的用于数据传输, 有的指示传输速率, 其中触发配置非周期 SRS的控制信息只是 DCI中的一种。 一个 PDCCH中所 携带的 DCI往往会包括多个控制信令, 每个控制信令称为一个信息位, 而不 同的 PDCCH中携带的 DCI可能会包括不同的信息位。有些 DCI具有触发 SRS 的信息位即 SRS信息位, 另外的 DCI没有 SRS信息位, 因而没有触发 SRS 的功能。 某些 DCI中除了指示 SRS是否被触发外, 还可以进行参数配置。 终 端在正确接收到了 DCI后, 由于此前通过高层信令得到了部分参数配置, 现 在加上 DCI的 SRS信息位, 从而得到了所有的配置参数。 此后, 终端会按照 这些参数发送非周期 SRS。
本发明实施例提供一种优化上行测量参考信号的参数配置方法, 基站可 以生成 DCI, 该 DCI中携带有 SRS信息位, 且该 SRS信息位至少包含 2个 比特, SRS信息位包含可以指示终端重新进行周期性 SRS的参数配置的信息 或指示终端进行跨载波触发动态非周期 SRS的信息,并向终端发送 DCL SRS 信息位包含的信息在以下本发明实施例中将进行进一步描述, 和以下实施例 中描述的 SRS信息位包含的信息相同。基站通过向终端发送上述 DCI供该终 端按照 DCI中所携带的 SRS信息位发送 SRS。 本实施例中, SRS表示的多种 信息位中, 部分配置可以用作配置和触发非周期 SRS, 其余的配置可以用作 其它用途, 从而增加调度灵活性, 增强整体的资源利用率。
图 1为本发明发送 SRS的方法一实施例流程图,如图 1所示,该方法包括:
步骤 100, 基站向终端发送携带有 SRS信息位的 DCI;
本发明实施例中考虑到如果 DCI可以用作非周期 SRS的触发与配置,而 且该 DCI至少包括 2个比特, 则 SRS信息位是可以表示多种配置的。 本发明 实施例可以将这些配置分成几份, 一部分配置仍用来做非周期 SRS的触发与 配置, 而余下的配置可以用来实现其他功能, 例如包括重新配置周期性 SRS 的参数以及跨载波非周期 SRS的触发等等。 其中, 重新配置周期性 SRS的参 数可以更加灵活的调度 SRS资源, 例如临时暂停几次周期性 SRS的传输, 将 节省下来的资源用作其他用途。在本发明实施例中,暂停是指 UE跳过(skip ) 当前需要传输的周期性 SRS,在需要发送周期性 SRS时不发送该周期性 SRS, 因此, 可以认为是暂停周期性 SRS传输。跨载波非周期 SRS的触发则可以增 加载波聚合场景下 SRS触发的灵活性。
相应地, SRS信息位可以包含指示终端重新进行周期性 SRS的参数配置 的信息, 也可以包含指示终端进行跨载波触发动态非周期 SRS的信息, 各个 信息可以是基站预先与终端设定的, 或可以通过系统配置。 终端在接收到上 述 DCI后, 通过识别 DCI中 SRS信息位上设置的信息便可以明确终端通过 该 DCI指示终端的具体操作, 并且可以按照指示向基站发送 SRS。
基站在之前通过高层信令将周期性 SRS的全部参数、非周期 SRS的部分 或全部参数配置到终端侧后, 后续可以通过 PDCCH向终端下发 DCI。 在发 送 DCI之前, 基站可以对 DCI中 SRS信息位进行设置以指示终端具体的操 作。 例如, 若基站需要通过 DCI指示终端进行周期性 SRS的发送, 则可以将 SRS信息位设置为预先设定的对应的信息; 若基站需要通过 DCI指示终端进 行跨载波动态非周期 SRS的发送,则可以将 SRS信息位设置为预先设定的对 应的信息。 在基站对 SRS信息位进行设定后, 便将生成的 DCI通过 PDCCH 发送给终端。
步骤 101 , 基站接收终端根据 SRS信息位发送的 SRS。
终端在接收到该 DCI后, 通过识别 SRS信息位的信息, 获知基站的操作
指示, 便可以按照该指示来进行 SRS的发送处理。
本实施提供的发送 SRS的方法, 通过对 DCI中 SRS信息位多种配置中 的部分配置进行定义, 所述 SRS 信息位包含指示所述终端重新进行周期性 SRS的参数配置的信息或指示所述终端进行跨载波触发动态非周期 SRS的信 息, 使得该 DCI不仅可以用于非周期 SRS的参数配置和触发, 而且还可以用 于实现其他功能例如重新进行周期性 SRS的参数配置、 跨载波触发动态非周 期 SRS等, 从而增加调度灵活性, 增强整体的资源利用率。
图 2为本发明发送 SRS的方法另一实施例流程图, 如图 2所示, 该方法 包括:
步骤 200, 终端接收基站发送的、 携带有 SRS信息位的 DCI, 所述 SRS 信息位至少包含 2比特, 所述 SRS信息位可以包含指示所述终端重新进行周 期性 SRS的参数配置或指示所述终端进行跨载波触发动态非周期 SRS的信息。
本方法实施例是从终端侧介绍本发明的方案。终端接收基站发送的 DCI, 该 DCI是基站基于上述方法实施例通过设置 DCI中 SRS信息位的信息得到, 并由基站通过 PDCCH发送给终端的。 该 DCI携带有 SRS信息位, 且该 SRS 信息位至少包含 2个比特, 以保证该 SRS信息位可以包括多种配置。 SRS信 息位可以包含指示终端重新进行周期性 SRS的参数配置的信息或指示终端进 行跨载波触发动态非周期 SRS的信息。
步骤 201 , 所述终端按照所述下行控制信息中所携带的所述 SRS信息位 发送 SRS。
终端在接收到该 DCI后, 获取其中 SRS信息位的信息, 获知基站的操作 指示, 并按照基站的操作指示发送 SRS。 若基站的操作指示为重新进行周期 性 SRS的参数配置, 则终端将根据指示重新配置周期性 SRS的参数, 并根据 新的参数进行周期性 SRS的发送。 若基站的操作指示为跨载波触发动态非周 期 SRS, 则终端将根据指示在另一载波上触发非周期 SRS。
本发明实施例提供的发送 SRS的方法, 可以基于 DCI中 SRS信息位的
定义, 按照指示不仅可以用于非周期 SRS的参数配置和触发, 而且还可以用 于实现其他功能例如重新进行周期性 SRS的参数配置、 跨载波触发动态非周 期 SRS等, 从而增加调度灵活性, 增强整体的资源利用率。
进一步地, 上述提供的发送 SRS的方法各实施例中, 进行周期性 SRS的 参数配置可以有以下的实现方式, 例如, 进行周期性 SRS的参数配置为改变 周期性 SRS传输的参数,即指示终端重新进行周期性 SRS的参数配置的信息 包括以下任意一种或其组合:
该信息为指示终端改变发送周期性 SRS中使用的 SRS循环移位(CS ) 或 SRS梳齿(comb ) 的信息。 假设周期性 SRS此前采用的 CS为 X , 则基站 可以通过 DCI指示该终端改变使用的 CS, 例如基站可以通过 DCI将终端原 来配置的参数 CS改为 mod(x+4, 8) ( x+4后用 8取模) , 接收到 DCI后, 终 端将 CS改为 mod(x+4, 8) ( x+4后用 8取模 ) ; 或者基站可以通过 DCI改变 终端原来配置的参数 comb。 不同用户的 SRS的传输可以调度在相同的时频 资源上, 只要它们使用不同的 CS或者 comb, 相互间的干扰就可以很小。 目 前协议中, 有 2个 comb, 每个 comb上有 8个 CS, 所以相同的时频资源最多 可以容纳 2x8=16个 SRS传输。 但是现在有了非周期 SRS, 所以基站可以将 更多的 SRS分配到相同资源上, 例如 20个(其中有周期性的, 也有非周期 性的 ) , 只要每次只触发少于 16个 SRS就可能做到不发生资源冲突(不发 生碰撞 ) , 但这要求基站能够通过 DCI为用户选择合适的 CS和 comb。 本实 施例可以通过 DCI改变周期性 SRS的 CS或 comb, 好处是有可能在某子帧, 某非周期性 SRS触发后需要使用某周期性 SRS的 Comb或 CS, 此时可以通 过 DCI让周期性 SRS改变 comb/CS, 这样双方都可以顺利发送, 避免周期性 SRS的发送与其他用户发送的 SRS产生碰撞。
该信息为指示终端改变发送周期性 SRS中使用的周期的信息。 假设周期 性 SRS此前采用的周期为 N1 , 则基站可以通过 DCI指示该终端改变传输的 周期, 例如接收到 DCI后, 终端将周期切换为 N2。 这样可以根据具体传输状
况选择使用哪种周期, 例如需要经常进行周期性测量的时候采用比较短的周 期, 而在不需要经常周期性测量的时候采用长周期。
该信息为指示终端改变发送周期性 SRS中使用的带宽的信息。假设周期性 SRS此前采用的带宽为 W1 , 则基站可以通过 DCI指示该终端改变带宽, 例如 接收到 DCI后, 终端将带宽切换为 W2。 这样如果终端更适于做宽带的测量则 基站可以指示终端切换成宽带的 SRS ,否则基站可以用 DCI指示终端切换成窄 带的 SRS。
该信息为指示终端改变发送周期性 SRS中使用的跳频带宽的信息。假设周 期性 SRS此前的跳频带宽为 HI , 则基站可以通过 DCI指示该终端改变跳频带 宽, 例如接收到 DCI后, 终端将调频带宽切换为 H2。 这样基站可以根据业务 需要为终端灵活选择跳频带宽。
在本发明实施例中, 进行周期性 SRS的参数配置还可以为临时暂停 N次周 期性 SRS传输, 临时停发的次数 N可以通过高层信令配置在表 2中。
配置参数 解释
SRS发送时间 包括 SRS发送的周期, 以及起始的时间点
SRS频域位置 SRS发送的频域位置,注意 SRS可能会采用跳频的方式(在 不同的发送时刻, SRS发送在不同的频段)。这样通过多次 发送可以测量更宽的频段
SRS带宽 SRS的带宽
SRS的跳频带宽 SRS的跳频所覆盖的带宽
SRS循环移位 SRS传输时会对原信号序列乘以一个循环移位, 共有 8种 ( cyclic shift ) 循环移位, eNB配置时需要说明具体使用哪一个循环移位
SRS梳齿(comb ) SRS传输时, 有两组子载波可以选用, 这两组子载波称为 梳齿 0和梳齿 1 , eNB配置时需要说明具体使用哪一个循
环移位
停发周期性 SRS N1
的次数
发送非周期 SRS N2
的次数
目标载波 目标载波的标识
指示终端重新进行周期性 SRS的参数配置的信息可以包括指示终端暂停 发送周期性 SRS的信息, 例如指示终端在接收到 DCI起, 根据高层信令中所配 置的暂停发送次数,暂停发送周期性 SRS。例如某终端被配置传输周期性 SRS, 之后就持续周期性的发送 SRS。 在本发明实施例中, 基站可以向该终端发送 DCI, 通知其暂停 N次发送。 这样由于终端暂停了 N次发送, 相应的时频资源 可以用作其他用途, 例如基站可以调度其他用户在该资源上发送非周期 SRS。
在本发明实施例中, 指示终端重新进行周期性 SRS的参数配置的信息还 可以为指示终端暂停发送周期性 SRS , 并触发和配置非周期性 SRS传输的信 息。 例如该信息可以指示终端在接收到 DCI起, 根据高层信令中所配置的暂 停发送次数, 暂停发送周期性 SRS , 并同时按照高层信令的配置参数触发非 周期性 SRS。 此处的配置非周期性 SRS传输在已有非周期性 SRS传输配置的情 况下, 可以认为是非周期性 SRS传输的重配置。 具体地, 该信息可以指示终 端在接收到 DCI起, 暂停发送 N次的周期性 SRS, 并同时触发非周期性 SRS的 信息。 触发非周期性 SRS的次数通过高层信令配置, 如表 2所示, 其所占的频 段与暂停发送的周期性 SRS相同, 但是所在时间符合高层信令对于非周期性 SRS的配置。
在本发明实施例中, 指示终端重新进行周期性 SRS的参数配置的信息还 可以为指示终端暂停发送周期性 SRS, 并触发和配置非周期性 SRS传输, 且该 非周期传输中 CS和 /或 comb具有长度为 N的偏移的信息。例如该信息可以指示 终端在接收到 DCI起, 根据高层信令中所配置的暂停发送次数, 暂停发送周
期性 SRS , 并同时按照高层信令的配置参数触发非周期性 SRS , 并且参数 CS 和 comb中的一个或全部在周期性 SRS配置的基础上增加一个偏移量, 例如原 先配置的 CS为 X, 则此时触发的非周期 SRS采用的 CS为 mod ( χ+Ν,8 ) , 其中 N 为偏移量。此处的配置非周期性 SRS传输在已有非周期性 SRS传输配置的情况 下, 可以认为是非周期性 SRS传输的重配置。
图 3为本发明实施例提供的一种非周期性 SRS触发的示意图, 如图 3所示, 横轴为时间, 纵轴为频率。 斜线阴影部分为周期性 SRS。 在图 3所示的实施例 中, 在第 n子帧, 基站触发 PDCCH传输给终端, 终端此后可能需要若干子帧 (例如 4个子帧) 时间解调出 DCI所携带信息, 终端根据基站发送的 SRS信息 位要暂停 N1 (此处为 1 ) 次周期性 SRS的发送, 即图 3中在 n+kp子帧处暂停 1 次周期性 SRS发送( n+kp的位置原来是该发送周期性 SRS的, 图中此处用横线 表示) , 并根据 SRS信息位, 同时触发 N2 (此处为 1 )次非周期性 SRS传输, 且发送时间是按照非周期 SRS配置的时间, 即图 3中在 n+ka子帧处进行非周期 性 SRS传输(图 3中用竖线表示) 。 在本实施例中, 在触发的非周期性 SRS传 输的参数中, 发送时间是按照非周期性 SRS传输的配置, 即 UE在 n+ka子帧上 进行非周期性 SRS传输;带宽和频域位置是按照被暂停发送的周期性 SRS的配 置, 即 UE在 n+ka子帧上发送的非周期性传输的带宽和频域的位置和 n+ka子帧 上暂停发送的周期性 SRS传输相同; 其余参数(包括 CS, Comb等参数)可以 按照高层配置进行传输, 可以是按照周期性 SRS传输的配置参数, 也可以是 按照非周期 SRS传输的配置参数进行。 另外, 在本实施例中, 还可以使参数 CS和 comb中的一个或全部在周期性 SRS配置的基础上增加一个偏移量, 例如 原先配置的 CS为 X, 则此时触发的非周期 SRS采用的 CS为 mod ( χ+Ν,8 ) , 其 中 Ν为偏移量。
上述提供的发送 SRS的方法实施例中, 指示终端进行跨载波触发动态非 周期 SRS的信息还包括指示终端在接收到 DCI起,根据高层信令中所配置的目 标载波标识, 如表 2所示, 进行跨载波触发动态非周期 SRS的信息。 跨载波触
发主要是应用在载波聚合场景下, 该场景下一个终端可以在多个上行载波上 传输数据。 PDCCH与上行载波有绑定关系。 例如某终端有两个上行载波, 那 么 PDCCH与这两个载波是有分别绑定关系的, 例如某 PDCCH与第一载波绑 定, 那么这个 PDCCH只能触发第一载波上发送非周期 SRS。 这里本实施例引 入了跨载波触发, 如果终端接收到了该配置的 PDCCH, 则应该在第二载波上 发送 SRS。 通过这样的方式, 可以增加 SRS触发与调度的灵活性, 因为现有技 术只能触发本载波上的 SRS , 本发明实施例可以支持触发其他载波上的 SRS。 再进一步地, 若除了第一载波外, 还存在其他两个载波, 此时需要事先通过 高层信令将指示跨载波的目标载波设置在表 2中, 如表 2所示, SRS信息位的 信息仅作跨载波的触发即可。
当然, 一个包含至少 2比特的 DCI可以表示多种配置, 本发明实施例指出 其中一部分配置可以仍按现有技术即 DCI中 SRS信息位还可以包含用于触发 终端发送非周期 SRS的信息, 即触发和配置本载波上的非周期 SRS; 而用另外 一些配置来实现上面所述的其他功能。 一个具体例子如下表 3所示, 动态配置 非周期 SRS的部分参数。
表 3
SRS信息位 配置
000 不作任何动作
001 触发 SRS, 使用 CSO, combO
010 触发 SRS, 使用 CS4, combO
011 触发 SRS, 使用 CSO, combl
100 触发 SRS, 使用 CS4, combl
101 重新配置周期性 SRS, 改为使用一个新的 CS (例如原来的
CS+4 )
110 重新配置周期性 SRS , 从接收到该 PDCCH时刻起, 不发送
后面的 N次周期性 SRS
111 跨载波触发动态非周期 SRS
表 3所示的例子中, 由于该 DCI有 3bit, 故可以表示 8种配置。 其中 "000" 表示不需要终端做任何处理; "001-100" , 用来对动态非周期 SRS进行配置; "101-110" , 表示对周期性 SRS的重新配置; "111" , 表示用来进行跨载波 的 SRS触发。 终端接收到该 DCI后, 根据 DCI上携带的信息进行下一步操作。 如果为 "000"则不进行任何动作; 如果为 "001-100" , 则触发非周期性 SRS, 并按照相应信息对非周期 SRS进行配置; 如果为 "101-110" , 则重新配置周 期性 SRS; 如果为 "111" 则在相应的载波上发送动态非周期 SRS。
若 DCI中 SRS信息位只包括 2bit, 则可以表示 4种配置: "00"表示不需要 做任何处理; "01-10" 表示对于动态非周期 SRS的配置信息; "11" 表示对 周期性 SRS的重新配置。 另外, 用 DCI对于非周期性 SRS的配置也可以包括多 种可能性, 表 3中仅仅给出了配置 CS和 comb的例子, 其他的可能性包括对于 表 2中其他参数的重新配置, 例如改变带宽, 改变频域位置等。
本发明各方法实施例中, 将能够表示多个配置的 SRS信息位中的部分配 置用作除了配置和触发非周期 SRS的其他用途, 从而增加调度灵活性, 增强 整体的资源利用率。
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步骤 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步骤; 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。
图 4为本发明基站实施例结构示意图, 如图 4所示, 该基站包括第一发 送模块 11和第一接收模块 12, 其中, 第一发送模块 11用于向终端发送携带 有 SRS信息位的 DCI, 所述 SRS信息位至少包含 2比特, 所述 SRS信息位 包含指示终端重新进行周期性 SRS的参数配置的信息或指示所述终端进行跨 载波触发动态非周期 SRS的信息; 第一接收模块 12用于接收终端根据 SRS
信息位发送 SRS。
具体地,本发明实施例中考虑到如果一个 DCI可以用作非周期 SRS的触 发与配置, 而且该 DCI至少包括 2比特, 则 SRS信息位是可以表示多种配置 的, 可以将这些配置分成几份, 一部分配置仍用来做非周期 SRS的触发与配 置, 而余下的配置可以用来实现其他功能, 例如包括重新配置周期性 SRS的 参数以及跨载波非周期 SRS的触发等等。 基站通过第一发送模块 11生成包 含具有标识作用的 SRS信息位的 DCI, 并发送给终端, 终端在接收到该 DCI 后, 通过识别 SRS信息位的信息, 获知基站的操作指示, 便可以发送 SRS, 基 站可以通过第一接收模块 12接收该终端根据所述 SRS信息位而返回的 SRS。
进一步地, 上述实施例中第一发送模块 11包括生成单元和发送单元, 生 成单元可以进行不同信息的设置, 例如进行周期性 SRS的参数配置、 跨载波 触发动态非周期 SRS以及非周期 SRS的参数配置,生成单元通过其中包括的 以下子模块实现, 具体地, 生成单元包括以下各子模块中任意一个或组合: 第一生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的 SRS循环移位的信息;
第二生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的 SRS梳齿的信息;
第三生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的周期的信息;
第四生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的带宽的信息;
第五生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS
信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的跳频带宽的信息;
第六生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端暂停发送周期性 SRS 的信息; 例如, 在接收到所述下行控制信息起, 根据高层信令中所配置 的暂停发送次数, 暂停发送周期性 SRS;
第七生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端进行跨载波触发 动态非周期 SRS的信息, 例如, 在接收到所述下行控制信息起, 根据高层信 令中所配置的目标载波信息进行跨载波触发动态非周期 SRS的信息;
第八生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含用于触发所述终端发送非周期 SRS的信息。
第九生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端暂停发送周期性 SRS, 并同时按照高层信令的配置参数触发非周期性 SRS的信息。
第十生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端暂停发送周期性 SRS, 并触发和配置非周期性 SRS传输, 且该非周期性传输的循环移位和 /或 梳齿与周期性 SRS相比具有长度为 N的偏移的信息。
本实施例提供的基站的处理流程和功能可以参见上述各方法实施例, 此 处不再赘述。 本实施提供的基站, 通过对 DCI中 SRS信息位多种配置中的部 分配置按照实际需求进行重新定义,使得该 DCI不仅可以用于非周期 SRS的 参数配置和触发, 还可以用于实现其他功能例如重新进行周期性 SRS的参数 配置、 跨载波触发动态非周期 SRS等, 从而增加调度灵活性, 增强整体的资 源利用率。
图 5为本发明终端实施例结构示意图, 如图 5所示, 该终端包括接收模 块 21和第二发送模块 22, 其中, 接收模块 21用于接收基站发送的、 携带有 SRS信息位的 DCI, 所述 SRS信息位至少包含 2比特, 所述 SRS信息位包含 指示所述终端重新进行周期性 SRS的参数配置的信息或指示所述终端进行跨 载波触发动态非周期 SRS的信息; 第二发送模块 22用于根据所述 SRS信息 位发送 SRS。
具体地, 基站按照实际需求设置 DCI中 SRS信息位的信息、 并生成 DCI 后, 将该 DCI通过 PDCCH发送给终端。 终端通过接收模块 21接收该 DCI, 然后获取其中 SRS信息位的信息, 并通过第二发送模块 22按照基站的操作 指示发送 SRS。 本实施例提供的终端的具体处理流程和功能可以参见上述各 方法实施, 此处不再赘述。
本发明实施例提供的终端, 可以基于 DCI中 SRS信息位的重新定义, 按 照 SRS信息位不仅可以用于非周期 SRS的参数配置和触发,而且还可以用于 实现其他功能例如重新进行周期性 SRS的参数配置、 跨载波触发动态非周期 SRS等, 从而增加调度灵活性, 增强整体的资源利用率。
图 6为本发明通信系统实施例结构示意图, 如图 6所示, 该通信系统包 括基站 1和终端 2, 其中基站 1和终端 2通过无线网络连接。 本通信系统中 涉及的基站能够通过对 DCI中 SRS信息位多种配置中的部分配置按照实际需 求进行重新定义, 使得该 DCI不仅可以用于非周期 SRS的参数配置和触发, 而且还可以用于实现其他功能例如重新进行周期性 SRS的参数配置、 跨载波 触发动态非周期 SRS等, 从而增加调度灵活性, 增强整体的资源利用率。
本通信系统实施例中涉及的基站和终端, 可以采用上述各装置实施例中 所提供的基站和终端, 装置实施例中的基站和终端可以实施上述本发明实施 例提供的方法实施例, 通信系统中的 SRS触发处理流程可以参见上述各方法 实施例所提供的处理流程, 此处不再赘述。
最后应说明的是: 以上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、 一种发送测量参考信号 SRS的方法, 其特征在于, 包括:
向终端发送携带有 SRS信息位的下行控制信息,所述 SRS信息位至少包 含 2比特,所述 SRS信息位包含指示所述终端重新进行周期性 SRS的参数配 置的信息或指示所述终端进行跨载波触发动态非周期 SRS的信息;
接收所述终端根据所述 SRS信息位发送的 SRS。
2、 根据权利要求 1所述的发送测量参考信号 SRS的方法, 其特征在于, 其中, 指示所述终端重新进行周期性 SRS的参数配置的信息包括以下任意一 种或组合:
指示所述终端改变发送周期性 SRS中使用的 SRS循环移位的信息; 或, 指示所述终端改变发送周期性 SRS中使用的 SRS梳齿的信息; 或, 指示所述终端改变发送周期性 SRS中使用的周期的信息; 或,
指示所述终端改变发送周期性 SRS中使用的带宽的信息; 或,
指示所述终端改变发送周期性 SRS中使用的跳频带宽的信息; 或, 指示所述终端暂停发送周期性 SRS的信息; 或,
指示所述终端暂停发送周期性 SRS , 并触发和配置非周期性 SRS传输的 信息; 或,
指示所述终端暂停发送周期性 SRS , 并触发和配置非周期性 SRS传输, 且该非周期性传输的循环移位和 /或梳齿与周期性 SRS相比具有长度为 N的 偏移的信息。
3、 根据权利要求 1所述的发送测量参考信号 SRS的方法, 其特征在于, 其中, 指示所述终端进行跨载波触发动态非周期 SRS的信息包括:
指示所述终端根据高层信令中所配置的目标载波信息, 进行跨载波触发 动态非周期 SRS的信息。
4、 根据权利要求 1或 2或 3所述的发送测量参考信号 SRS的方法, 其 特征在于,所述 SRS信息位还包含用于触发所述终端发送非周期 SRS的信息。
5、 一种发送测量参考信号 SRS的方法, 其特征在于, 包括: 终端接收基站发送的、携带有 SRS信息位的下行控制信息, 所述 SRS信 息位至少包含 2比特,所述 SRS信息位包含指示所述终端重新进行周期性 SRS 的参数配置的信息或指示所述终端进行跨载波触发动态非周期 SRS的信息; 所述终端根据所述 SRS信息位发送 SRS。
6、 根据权利要求 5所述的发送测量参考信号 SRS的方法, 其特征在于, 其中, 指示所述终端重新进行周期性 SRS的参数配置的信息包括以下任意一 种或组合:
指示所述终端改变发送周期性 SRS中使用的 SRS循环移位的信息; 或, 指示所述终端改变发送周期性 SRS中使用的 SRS梳齿的信息; 或, 指示所述终端改变发送周期性 SRS中使用的周期的信息; 或,
指示所述终端改变发送周期性 SRS中使用的带宽的信息; 或,
指示所述终端改变发送周期性 SRS中使用的跳频带宽的信息; 或, 指示所述终端暂停发送周期性 SRS的信息; 或,
指示所述终端暂停发送周期性 SRS , 并触发和配置非周期性 SRS传输的 信息; 或,
指示所述终端暂停发送周期性 SRS , 并触发和配置非周期性 SRS传输, 且该非周期性传输的循环移位和 /或梳齿与周期性 SRS相比具有长度为 N的 偏移的信息。
7、 根据权利要求 5所述的发送测量参考信号 SRS的方法, 其特征在于, 其中, 指示所述终端进行跨载波触发动态非周期 SRS的信息包括:
指示所述终端根据高层信令中所配置的目标载波信息, 进行跨载波触发 动态非周期 SRS的信息。
8、 根据权利要求 5或 6或 7所述的发送测量参考信号 SRS的方法, 其 特征在于,所述 SRS信息位还包含用于触发所述终端发送非周期 SRS的信息。
9、 一种基站, 其特征在于, 包括: 第一发送模块, 用于向终端发送携带有 SRS信息位的下行控制信息, 所 述 SRS信息位至少包含 2比特,所述 SRS信息位包含指示所述终端重新进行 周期性 SRS 的参数配置的信息或指示所述终端进行跨载波触发动态非周期 SRS的信息;
第一接收模块, 用于接收所述终端根据所述 SRS信息位发送 SRS。
10、 根据权利要求 9所述的基站, 其特征在于, 所述第一发送模块包括 生成单元和发送单元, 其中生成单元包括以下各子模块中任意一个或组合: 第一生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的 SRS循环移位的信息; 或,
第二生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的 SRS梳齿的信息; 或,
第三生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的周期的信息; 或,
第四生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的带宽的信息; 或,
第五生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端改变发送周期性 SRS中使用的跳频带宽的信息; 或,
第六生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端暂停发送周期性 SRS的信息; 或,
第七生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端进行跨载波触发 动态非周期 SRS的信息; 或,
第八生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含用于触发所述终端发送非周期 SRS的信息; 或,
第九生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端暂停发送周期性 SRS, 并触发和配置非周期性 SRS传输的信息; 或,
第十生成子模块,用于生成携带有 SRS信息位的下行控制信息,所述 SRS 信息位至少包含 2比特, 所述 SRS信息位包含指示所述终端暂停发送周期性 SRS, 并触发和配置非周期性 SRS传输, 且该非周期性传输的循环移位和 /或 梳齿与周期性 SRS相比具有长度为 N的偏移的信息。
11、 一种终端, 其特征在于, 包括:
接收模块, 用于接收基站发送的、 携带有 SRS信息位的下行控制信息, 所述 SRS信息位至少包含 2比特,所述 SRS信息位包含指示所述终端重新进 行周期性 SRS的参数配置或指示所述终端进行跨载波触发动态非周期 SRS的 信息;
第二发送模块, 用于根据所述 SRS信息位发送 SRS。
12、 一种通信系统, 其特征在于, 包括如权利要求 9或 10所述的基 站, 以及如权利要求 11所述的终端。
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