WO2013170782A1 - Procédé, système et dispositif permettant de configurer une mesure de canal et d'effectuer une mesure de canal de liaison montante - Google Patents

Procédé, système et dispositif permettant de configurer une mesure de canal et d'effectuer une mesure de canal de liaison montante Download PDF

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Publication number
WO2013170782A1
WO2013170782A1 PCT/CN2013/075821 CN2013075821W WO2013170782A1 WO 2013170782 A1 WO2013170782 A1 WO 2013170782A1 CN 2013075821 W CN2013075821 W CN 2013075821W WO 2013170782 A1 WO2013170782 A1 WO 2013170782A1
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Prior art keywords
srs
uplink subframe
subframe
group
user equipment
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PCT/CN2013/075821
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English (en)
Chinese (zh)
Inventor
潘学明
沈祖康
徐婧
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电信科学技术研究院
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Publication of WO2013170782A1 publication Critical patent/WO2013170782A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • a time division duplex (TDD) mode refers to that the uplink and downlink use the same working frequency band to transmit uplink and downlink signals at different time intervals.
  • GP guard interval
  • the FDD (Frequency Division Duplex) mode refers to the use of different working bands on the uplink and downlink. It can be performed on different frequency carriers at the same time.
  • the uplink and downlink signals are transmitted with a guard bandwidth (GB) between the uplink and the downlink.
  • GB guard bandwidth
  • a radio frame has a length of 10 ms and contains 10 sub-frames, including a special sub-frame and a regular sub-frame. Each sub-frame is Lms.
  • the special subframe is divided into three subframes: DwPTS (Downlink Pilot Time Slot); GP is used for guard interval between downlink and uplink); UpPTS (Uplink Pilot Time Slot).
  • the regular subframe includes an uplink subframe and a downlink subframe, and is used for transmitting an uplink/downlink control channel and service data.
  • two special subframes can be configured (in subframes 1 and 6), or a special subframe (in subframe 1) can be configured.
  • Subframe 0 and subframe 5 and DwPTS subframes in special subframes are always used for downlink transmission.
  • Subframe 2 and UpPTS subframes in special subframes are always used for uplink transmission.
  • Other subframes can be configured as needed. For uplink transmission or downlink transmission.
  • the uplink and downlink transmissions use the same frequency resource, and the uplink/downlink signals are transmitted on different subframes.
  • the division of uplink and downlink subframes is static or semi-static, and the usual practice is in the network.
  • the uplink and downlink subframe ratios are determined and remain unchanged according to the cell type and the approximate service ratio. This is a relatively simple approach in the context of large coverage of macro cells, and is also more effective.
  • more and more low-power base stations such as Pico cells and Home NodeBs are deployed to provide local small coverage. In such cells, the number of users is small, and The user service demand changes greatly, so the dynamic demand ratio of the uplink and downlink services of the community is dynamic. Change the situation.
  • Type 1 neighbor cell interference In the subframe in which the neighboring cells perform downlink transmission, the downlink UE of the local area receives the interference of the downlink signal of the neighboring base station;
  • Type 2 neighbor cell interference In the subframe where the neighboring cells perform uplink transmission, the base station receiving the UE uplink signal will be interfered by the uplink signal of the neighboring cell.
  • cross-slot interference as shown in FIG. 3 may occur.
  • the macro cell is used for uplink signal reception on the time slot in which the downlink signal is transmitted, and two types of interference occur between the two cells.
  • each variable subframe since there are subframes with a fixed transmission direction and a variable transmission direction, in each variable subframe, since the transmission direction of the neighboring cells is flexible, and there may be more than one strong in the region. Thousands of neighbors, so the type of interference received by this area may also be different. In the extreme case, in each variable subframe, the neighboring area received by this area for downlink transmission is different. In the different uplink subframes of the dynamic TDD system, the actual channel conditions are significantly different due to the different interferences in the neighboring cells.
  • the SRS Sounding Reference Signal
  • the SRS Sounding Reference Signal
  • the channel condition measured on a fixed uplink subframe is not applicable to a variable uplink subframe, and the channel condition measured on a variable uplink subframe is not applicable to other variable uplink subframes.
  • the configuration channel measurement and uplink channel measurement currently used in LTE Rel-8/9/10 are not applicable to the dynamic TDD system.
  • Embodiments of the present invention provide a method and a device for configuring channel measurement, which are used to implement channel measurement in a dynamic TDD system.
  • Embodiments of the present invention provide a method, system, and device for performing uplink channel measurement, which are used to perform uplink channel measurement in a dynamic TDD system.
  • the network side device divides the uplink subframe into multiple uplink subframe groups according to the interference condition on the uplink subframe.
  • the network side device notifies the user equipment of at least one channel measurement configuration information corresponding to the uplink subframe group.
  • the user equipment receives at least one channel measurement configuration information corresponding to the uplink subframe group from the network side device, where the uplink subframe group is obtained by the network side device according to the interference condition on the uplink subframe;
  • the user equipment performs uplink channel measurement according to channel measurement configuration information.
  • the dividing module is configured to divide the uplink subframe into multiple uplink subframe groups according to the interference condition on the uplink subframe.
  • the first processing module is configured to notify the user equipment of at least one channel measurement configuration information corresponding to the uplink subframe group.
  • a user equipment for performing uplink channel measurement according to an embodiment of the present invention includes:
  • a receiving module configured to receive, by the network side device, at least one channel measurement configuration information corresponding to the uplink subframe group, where the uplink subframe group is obtained by the network side device according to the interference condition on the uplink subframe;
  • the second processing module is configured to perform uplink channel measurement according to the channel measurement configuration information.
  • the network side device is configured to divide the uplink subframe into multiple uplink subframe groups according to the interference condition on the uplink subframe, and notify the user equipment of at least one channel measurement configuration information corresponding to the uplink subframe group;
  • a user equipment configured to receive at least one channel measurement configuration information corresponding to the uplink subframe group from the network side device; and perform uplink channel measurement according to the channel measurement configuration information.
  • the network side device notifies the user equipment of the channel measurement configuration information corresponding to the plurality of uplink subframe groups divided according to the interference condition on the uplink subframe, thereby implementing channel measurement in the dynamic TDD system.
  • FIG. 1 is a schematic diagram of a frame structure of a TD-LTE system
  • 2A is a schematic diagram of a neighboring cell interference of the first TDD in the same time slot configuration
  • 2B is a schematic diagram of a neighboring cell interference of the second TDD in the same time slot configuration
  • 3 is a schematic diagram of the interference of the TDD cross-slot neighboring cell
  • FIG. 4A is a schematic structural diagram of a first seed frame according to an embodiment of the present invention.
  • 4B is a schematic structural diagram of a second seed frame according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a system for performing uplink channel measurement according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a network side device in a system for performing uplink channel measurement according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of user equipment in a system for performing uplink channel measurement according to an embodiment of the present invention
  • FIG. 8 is a schematic flowchart of a method for configuring channel measurement according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a method for performing uplink channel measurement according to an embodiment of the present invention.
  • the network side device divides the uplink subframe into multiple uplink subframe groups according to the interference condition in the uplink subframe, and notifies the user equipment of the channel measurement configuration information corresponding to the uplink subframe group.
  • the network side device notifies the user equipment of the channel measurement configuration information corresponding to the plurality of uplink subframe groups divided according to the interference condition on the uplink subframe, thereby implementing channel measurement in the dynamic TDD system.
  • the user equipment receives the channel measurement configuration information corresponding to the uplink subframe group from the network side device, and performs uplink channel measurement according to the channel measurement configuration information.
  • the user equipment performs the uplink channel measurement according to the channel measurement configuration information, thereby implementing the uplink channel measurement in the dynamic TDD system; further enabling the network side device to accurately obtain the channel condition of the uplink subframe with different interference conditions, and according to the
  • the channel condition is used for scheduling uplink subframes with similar interference conditions, which solves the problem of uplink channel condition measurement under the condition that the interference condition of different subframes in the dynamic TDD system changes significantly, and improves system performance.
  • the radio frame in the uplink configuration of the embodiment of the present invention includes: a variable subframe, a downlink fixed subframe, an uplink fixed subframe, and a special subframe, where the downlink fixed subframe is a downlink direction and is transmitted. a subframe with a fixed direction and a downlink pilot slot in a special subframe, where the uplink fixed subframe is a subframe in which the transmission direction is the uplink direction and the transmission direction is fixed, and the variable subframe is a variable transmission direction.
  • variable subframe further includes an uplink variable subframe and a downlink variable subframe, wherein the uplink variable subframe is a variable subframe determined to be used for uplink transmission, and the downlink variable subframe is determined to be used as Variable subframe for downlink transmission.
  • the uplink pilot time slot in the special subframe of the embodiment of the present invention has the same function as the uplink pilot time slot in the special subframe in the background art, and the description is not repeated.
  • the embodiments of the present invention can be applied to a TDD system (such as a TD-LTE system), and can also be applied to other systems that need to dynamically adjust uplink and downlink configurations of a subframe, such as a TD-SCDMA system and its subsequent evolution system, WiMAX (Worldwide Interoperability). For Microwave Access, 4 wave access global interoperability) systems and their subsequent evolution systems.
  • subframe 2 is set as an uplink fixed subframe
  • subframe 0 and subframe 5 are downlink fixed subframes
  • subframes are used.
  • 1 is a special subframe
  • subframe 6 is a special subframe or a downlink subframe (a subframe whose transmission direction is a downlink), and the remaining subframes are variable subframes;
  • the subframe 6 is a special subframe, as shown in FIG. 4A.
  • Wireless frame structure
  • the subframe 6 is a downlink subframe (that is, a variable subframe in which the transmission direction is downlink, that is, a downlink variable subframe)
  • the subframe 6 is a downlink subframe (that is, a subframe in which the transmission direction is downlink).
  • a radio frame structure as shown in FIG. 4B.
  • a ratio of a maximum downlink (DL) subframe to an uplink (UL) subframe that can be supported is 9:1, thereby enabling resources in the dynamic TDD system. Adapt to a larger dynamic range and better match business changes.
  • the network side device when the network side device divides the uplink subframe into multiple uplink subframe groups according to the interference condition in the uplink subframe, the subframe transmission direction that needs to be scheduled and the strong interference adjacent to the target cell may be The subframe configuration information of the cell divides the subframe in one radio frame into multiple uplink subframe groups.
  • the network side device can determine whether the cell adjacent to the target cell is a strong interference cell according to one of the following manners:
  • the network side device determines, according to the detected signal strength of the cell adjacent to the target cell, whether the cell adjacent to the target cell is a strong interference cell, for example, comparing the signal strength with a threshold, if it is greater than the threshold, The cell is a strong interference zone;
  • the network side device determines, according to the cell identifier corresponding to the strong interference cell reported by the user equipment that belongs to the target cell, whether the cell adjacent to the target cell is a strong interference cell, for example, the user equipment pair may be specified to be in the target cell.
  • the signal strength of the neighboring cell is detected. If the signal strength is greater than the threshold, the cell identifier of the cell is received, and the corresponding network side device uses the corresponding cell as the strong interference cell after receiving the cell identifier;
  • the network side device After receiving the notification information sent by the cell adjacent to the target cell, the network side device determines that the cell is a strong interference cell adjacent to the target cell, where the notification information is that the cell adjacent to the target cell is received.
  • the signal strength sent by the target cell is determined to be transmitted by the strong interference cell of the target cell.
  • the neighboring cell can measure the signal of the victim cell. If the path loss is small, it considers itself to be a strong interference of the cell. The cell then passes through the signaling of the network interface to the cell.
  • embodiments of the present invention are not limited to the foregoing three modes, and other embodiments capable of determining whether a cell adjacent to the target cell is a strong interference cell are also applicable to the embodiment of the present invention.
  • the network side device may obtain the subframe configuration information of the strong interference cell adjacent to the target cell by using the interface signaling, or may independently detect the subframe configuration information of the strong interference cell adjacent to the target cell. Certainly, the manner in which the sub-frame configuration information can be obtained is also applicable to the embodiment of the present invention, for example, after the user equipment obtains the network side device.
  • the network side device may divide the fixed subframe in the cell whose transmission direction is uplink or contains an uplink pilot time slot into one uplink subframe group, and the variable subframe in which the transmission direction is uplink in the target cell. Divided into at least one uplink subframe group.
  • all the uplink subframes in one radio frame are divided into two types, one is a subframe in which the neighboring area is fixed in a fixed direction, and the other is a direction in which the neighboring area may be changed.
  • the neighboring area is configured with a fixed subframe, for example, subframes 0, 1, 2, 5, and 6 in each radio frame, where subframes 0, 1, 5, and 6 are fixed as downlink subframes (or contain downlink guides).
  • Subframe 2 of the frequency slot subframe 2 is fixed as an uplink subframe.
  • the neighboring interference is the uplink interference from the base station, it can be considered that the interference received by the base station in these subframes is substantially equal, so
  • the uplink subframe 2 constitutes an uplink subframe group; then it will be transmitted in the target cell.
  • variable subframe in which the uplink direction is the uplink is divided into at least one uplink subframe group, for example, the subframes 3, 4, 7, 8, 9 in each radio frame are variable subframes, and the subframes 3, 4,
  • the number of uplink subframe groups divided by 7, 8, and 9 is not greater than the number of uplink subframes in subframes 3, 4, 7, 8, and 9.
  • the network side device may further divide the variable subframe into two types of variable subframes, where the first type of variable subframe is a variable subframe in which the transmission direction is uplink in the strong interference cell, and the second A class-variable subframe is a variable subframe in which a transmission direction is uplink in a partially strong-interference cell.
  • first type of variable subframe is a variable subframe in which the transmission direction is uplink in the strong interference cell
  • second A class-variable subframe is a variable subframe in which a transmission direction is uplink in a partially strong-interference cell.
  • the network side device divides the first type of variable subframe into one uplink subframe group; and divides the second type of variable subframe into at least one uplink subframe group, where each divided uplink subframe
  • the second type of variable subframes in the group have the same transmission direction in each strong-interference cell.
  • the subframe and the subframe 2 may be classified into the same uplink subframe group;
  • the target cell is configured as a subframe 6; there are two strong interference neighbors, and the time slot configurations are configuration 1 and configuration 2, respectively. As shown in Table 1:
  • Subframe 2 is a fixed subframe in which the transmission direction is uplink in the target cell
  • the subframes 3, 4, 7, and 8 are variable subframes whose transmission direction is uplink in the target cell, and the transmission direction of the subframe 7 in both the cell 1 and the cell 2 is uplink, so the subframe 7 is the first type of variable.
  • the combinations of transmission directions of cell 1 and cell 2 corresponding to subframes 3, 4, and 8 are: (U, D), (D, D), (U, D). Since subframe 3 and subframe 8 are combined in the transmission direction of cell 1 and cell 2 (U, D), subframe 3 and subframe 8 are divided into one uplink subframe group, and subframe 4 is divided into one uplink. In the subframe group.
  • the embodiment of the present invention may also use each downlink subframe as an uplink subframe group.
  • the fixed subframes may also be grouped into one group, and the variable subframes may be grouped into one group.
  • the embodiment of the present invention is not limited to the foregoing division manner, and other embodiments capable of dividing an uplink subframe group according to the interference condition in the downlink subframe are applicable to the embodiment of the present invention.
  • the system for performing uplink channel measurement in the embodiment of the present invention includes: a network side device 10 and a user equipment 20.
  • the network side device 10 is configured to divide the uplink subframe into multiple uplink subframe groups according to the interference condition on the uplink subframe, and notify the user equipment 20 of at least one channel measurement configuration information corresponding to the uplink subframe group;
  • the user equipment 20 is configured to receive at least one channel measurement configuration information corresponding to the uplink subframe group from the network side device 10, and perform uplink channel measurement according to the channel measurement configuration information.
  • the channel measurement configuration information of the uplink subframe group divided by the network side device 10 is not necessarily notified to the same user equipment 20, and the network side device 10 may select which uplink subframe group channel measurement configuration information is notified according to the requirement.
  • User equipment 20 For example, if there are uplink subframe groups 1, 2, 3, 4, 5, the channel measurement configuration information of the uplink subframe groups 1 and 2 can be notified to the user equipment a, and the channel measurement configuration information of the uplink subframe group 3 can be notified to The user equipment b notifies the user equipment 0 of the channel measurement configuration information of the uplink subframe groups 4 and 5. For the user equipment, only the channel measurement configuration information needs to be measured and fed back. It is not necessary to know how many groups are shared.
  • the embodiments of the present invention provide two schemes for performing uplink channel measurement, that is, periodic and aperiodic, which are respectively introduced below.
  • the network side device 10 notifies the user equipment 20 of the uplink subframe included in the uplink subframe group; correspondingly, the user equipment 20 receives the notification of the uplink subframe included in the uplink subframe group from the network side device.
  • the network side device 10 informs the user equipment 20 of the included downlink subframes in each group through high layer signaling.
  • the network side device 10 determines an SRS (Sounding Reference Signal) parameter group corresponding to the uplink subframe group, and determines the determined SRS parameter group corresponding to the uplink subframe group as the uplink subframe group.
  • SRS Sounding Reference Signal
  • the user equipment 20 periodically measures and transmits the SRS corresponding to the uplink subframe group according to the configured SRS parameter group.
  • the parameters included in the SRS parameter group can be seen in Table 2.
  • SRS Transmission comb that is, subcarriers transmitted by SRS
  • the SRS parameter group configured by the network side device 10 for different uplink subframe groups is independent of each other.
  • the SRS transmission subframes determined according to the SRS parameter group corresponding to any two uplink subframe groups are different.
  • the relative position of the subframe is a relative position of the SRS transmission subframe in one SRS transmission period.
  • the network side device 10 and the user equipment 20 can determine the SRS transmission subframe according to the SRS transmission period and the relative position of the subframe.
  • the user equipment 20 For an uplink subframe group, the user equipment 20 performs uplink channel measurement according to the SRS parameter group corresponding to the uplink subframe group, and sends the SRS on the SRS transmission subframe determined according to the corresponding SRS parameter group.
  • the SRS transmission subframes in the SRS parameter group corresponding to different uplink subframe groups may be different. Therefore, it is possible that the SRS transmission subframes corresponding to different uplink subframe groups are the same subframe. For example, if an SRS transmission period is 5 ms and an SRS transmission period is 10 ms, it may happen that the SRS transmission subframes corresponding to different uplink subframe groups are the same subframe.
  • the SRS corresponding to one uplink subframe group in different uplink subframe groups is used.
  • the parameter group sends an SRS. That is, when the SRS transmission subframe positions corresponding to different uplink subframe groups are located in the same subframe, the SRS is sent according to the SRS parameter group of one of the uplink subframe groups.
  • the network side device 10 notifies the user equipment 20 of the uplink subframe included in the uplink subframe group; correspondingly, the user equipment 20 receives the notification of the uplink subframe included in the uplink subframe group from the network side device.
  • the network side device 10 informs the user equipment 20 of the included downlink subframes in each group through high layer signaling.
  • the network side device 10 determines an SRS parameter group corresponding to the uplink subframe group, and determines the determined uplink subframe.
  • the SRS parameter group corresponding to the group is used as the channel measurement configuration information corresponding to the uplink subframe group;
  • the user equipment 20 periodically measures the SRS corresponding to the uplink subframe group according to the configured SRS parameter group.
  • the parameters included in the SRS parameter group can be found in Table 2.
  • the SRS parameter group configured by the network side device 10 for different uplink subframe groups is independent of each other.
  • the SRS transmission subframes determined according to the SRS parameter group corresponding to any two uplink subframe groups are different.
  • the relative position of the subframe is a relative position of the SRS transmission subframe in one SRS transmission period.
  • the network side device 10 and the user equipment 20 can determine the SRS transmission subframe according to the SRS transmission period and the relative position of the subframe.
  • the SRS transmission subframes in the SRS parameter group corresponding to different uplink subframe groups may be different. Therefore, it is possible that the SRS transmission subframes corresponding to different uplink subframe groups are the same subframe. For example, if an SRS transmission period is 5 ms and an SRS transmission period is 10 ms, it may happen that the SRS transmission subframes corresponding to different uplink subframe groups are the same subframe.
  • the user equipment 20 For an uplink subframe group, the user equipment 20 performs uplink channel measurement according to the SRS parameter group corresponding to the uplink subframe group, and sends the SRS on the SRS transmission subframe determined according to the corresponding SRS parameter group.
  • the SRS corresponding to one uplink subframe group in different uplink subframe groups is used.
  • the parameter group sends an SRS. That is, when the transmission subframe positions corresponding to different uplink subframe groups are located in the same subframe, the SRS is sent according to the SRS parameter group of one of the uplink subframe groups.
  • the user equipment 20 After the network side device 10 configures the channel measurement configuration information for the user equipment 20, the user equipment 20 is also required to trigger the user equipment 20 to send the SRS corresponding to the at least one uplink subframe group; correspondingly, the user equipment 20 is receiving After the triggering of the network-side device 10, determining, according to the SRS parameter group corresponding to the uplink subframe group, one SRS transmission subframe of the uplink subframe group, and transmitting, corresponding to the uplink subframe group, the SRS transmission subframe SRS.
  • the network side device 10 can trigger the user equipment to send the SRS corresponding to the at least one uplink subframe group by using the SRS request (Request) information in the PDCCH (Physical Downlink Control Channel); correspondingly, the user equipment According to the SRS request information in the PDCCH received from the network side device 10, after determining that the SRS needs to be sent, determining an SRS transmission subframe that is closest to the uplink subframe group according to the SRS parameter group corresponding to the uplink subframe group, And transmitting an SRS corresponding to the uplink subframe group on the SRS transmission subframe.
  • SRS request Request
  • PDCCH Physical Downlink Control Channel
  • the SRS request information is carried by a DL grant (downlink scheduling) or a UL grant (uplink scheduling) of the PDCCH.
  • Trigger mode 1 The SRS request information is 1 bit, and the bit indicates whether the feedback is triggered.
  • the user equipment 20 transmits the SRS on the subframe n+k; wherein k > m, m is The user equipment processing time in units of subframes, and the subframe n+k is the SRS transmission subframe closest to the subframe n.
  • the processing time of the user equipment includes the receiving and processing control signaling of the user equipment, the CSI measurement, the preparation time of the uplink sending, and the like (the processing time of the subsequent user equipment is the same as here, and the description is not repeated).
  • the processing time of a general user equipment is 4 subframes, that is, 4 ms.
  • the SRS request information is 1 bit.
  • the bit is 1, the feedback is triggered.
  • the bit is 0, the feedback is not triggered.
  • the SRS request information received in the subframe n when the SRS bit is 1, an aperiodic SRS is transmitted in the subframe n+k, where k > 4 and n+k is the most aperiodic transmission sub-subframe n frame.
  • the SRS is sent according to the SRS parameter of the subframe group 1; when the subframe n+ When k is the SRS transmission subframe corresponding to the uplink subframe group 2, the SRS is transmitted according to the SRS parameter of the subframe group 2.
  • the bit in the SRS request message is 0, the SRS is not transmitted.
  • Trigger mode 2 The SRS request information is multi-bit, and the multiple-bit combination of the SRS request information indicates which SRS of the uplink subframe is fed back by the user equipment.
  • the network side device 10 determines, according to the correspondence between the uplink subframe group and the bit value, the bit value corresponding to the uplink subframe group that needs to send the SRS, determines the SRS request information according to the determined bit value, and determines the determined SRS request information. Notifying the user device 20;
  • the user equipment 20 determines an uplink subframe group corresponding to the bit value of the SRS request information according to the correspondence between the uplink subframe group and the bit value, and determines the latest SRS according to the SRS parameter group corresponding to the determined uplink subframe group. Transmitting a location of the subframe, and transmitting an SRS corresponding to the uplink subframe group on the SRS transmission subframe.
  • the user equipment 20 determines one SRS transmission subframe according to the SRS parameter group corresponding to the uplink subframe group a, and sends and uplinks on the SRS transmission subframe.
  • the SRS corresponding to the subframe group a is the SRS corresponding to the subframe group a.
  • the user equipment 20 transmits the SRS on the subframe n+ki; where ki > m, m is The user equipment processing time in units of subframes, and the subframe n+ki is an SRS transmission subframe corresponding to the i-th uplink subframe group closest to the subframe n, where i is a positive integer less than or equal to N, and i is The number of uplink subframe groups that need to send SRS triggered by the SRS request information, where N is the number of uplink subframe groups.
  • the SRS is transmitted in the subframes n+k1 and/or n+k2, where kl > 4, k2 > 4, and the subframe n+kl is the SRS transmission subframe of the corresponding subframe group 1 closest to the subframe n, and the subframe n+k2 is the closest correspondence to the subframe n
  • the SRS transmission subframe of subframe group 2 is.
  • the respective SRS parameters are used when transmitting the SRS signals of subframe group 1 or 2.
  • the SRS is transmitted using only one set of parameters.
  • the SRS request information is multi-bit. When there are a large number of uplink subframe groups, the uplink subframe group is further divided into a set, and one set includes more than one uplink subframe group. The multiple bit combinations of the SRS request information are used to indicate which SRS of the uplink subframe group within the set is fed back by the user equipment.
  • the network side device 10 determines, according to the correspondence between the uplink subframe set and the bit value, the bit value corresponding to the uplink subframe set that needs to send the SRS, determines the SRS request information according to the determined bit value, and determines the determined SRS request information. Notifying the user equipment 20; wherein, an uplink subframe set includes at least one uplink subframe group; correspondingly, the user equipment 20 determines an uplink subframe corresponding to the bit value of the SRS request information according to the correspondence between the uplink subframe set and the bit value.
  • the SRS corresponding to the uplink subframe group is sent in the sending subframe, and the at least one uplink subframe group is included in one downlink subframe set.
  • the user equipment 20 determines that the SRS corresponding to the uplink subframe group in the uplink subframe set a needs to be fed back, wherein the uplink subframe set a includes the uplink subframe groups 1 and 2, and the user equipment 20 corresponds to the uplink subframe group 1
  • the SRS parameter group determines one SRS to send the subframe A, and sends the SRS corresponding to the uplink subframe group 1 on the SRS transmission subframe, and one SRS transmission after determining according to the SRS parameter group corresponding to the uplink subframe group 2 Subframe B, and transmits an SRS corresponding to the uplink subframe group 2 on the SRS transmission subframe.
  • the user equipment 20 transmits the SRS on the subframe n+ki;
  • ki > m
  • m is the processing time of the user equipment in units of subframes
  • the subframe n+ki is the SRS transmission subframe corresponding to the i-th uplink subframe group closest to the subframe n
  • i is less than or equal to A positive integer of N
  • i is an uplink subframe group number that needs to be sent by the SRS request information
  • N is the number of uplink subframe groups.
  • the uplink subframe group 1, 2 is formed into the uplink subframe set 1
  • the uplink subframe group 3, 4 is formed into the uplink subframe set 2 , as shown in Table 4.
  • the user equipment 20 receives the DL grant or UL grant carrying the SRS request in the subframe n, and then sends the SRS in the subframe n+ki, where ki > 4, and the subframe n+ki is the SRS transmission subframe corresponding to the subframe group i included in the triggered subframe set closest to the subframe n, and i is the subframe group number.
  • the respective SRS parameter sets are used when transmitting the SRS signals of each subframe group.
  • the network side device 10 obtains the uplink channel condition corresponding to the uplink subframe group by receiving the SRS of the user equipment 20.
  • the network side device in the embodiment of the present invention may be a station (such as a macro base station, a home base station, etc.), an RN (relay) device, or other network side devices.
  • a station such as a macro base station, a home base station, etc.
  • RN relay
  • the network side device in the system for performing uplink channel measurement includes: a dividing module 600 and a first processing module 610.
  • the dividing module 600 is configured to divide the uplink subframe into multiple uplink subframe groups according to the interference condition on the uplink subframe.
  • the first processing module 610 is configured to notify the user equipment of at least one channel measurement configuration corresponding to the uplink subframe group. information.
  • the first processing module 610 notifies the user equipment of the uplink subframe included in the uplink subframe group.
  • the first processing module 610 determines an SRS parameter group corresponding to the uplink subframe group; and determines the determined SRS parameter group corresponding to the uplink subframe group as the channel measurement configuration information corresponding to the uplink subframe group.
  • the SRS transmission subframes determined according to the SRS parameter group corresponding to any two uplink subframe groups are different.
  • the user equipment is triggered to send the SRS corresponding to the at least one uplink subframe group.
  • the first processing module 610 triggers the user equipment to send the SRS corresponding to at least one uplink subframe group by using the SRS request information in the PDCCH.
  • the bit indicates whether the feedback is triggered.
  • the SRS request information is a plurality of bits.
  • the first processing module 610 determines a bit value corresponding to the uplink subframe group that needs to transmit the SRS according to the correspondence between the uplink subframe group and the bit value, and determines the SRS according to the determined bit value.
  • the request information, and the determined SRS request information is notified to the user equipment; or according to the correspondence between the uplink subframe set and the bit value, determining a bit value corresponding to the uplink subframe set that needs to send the SRS, and determining according to the determined bit value.
  • the SRS request information is used to notify the user equipment of the determined SRS request information.
  • the uplink subframe group includes at least one uplink subframe group.
  • the user equipment in the system for performing uplink channel measurement according to the embodiment of the present invention includes: a receiving module 700 and a second processing module 710.
  • the receiving module 700 is configured to receive, by the network side device, at least one channel measurement configuration information corresponding to the uplink subframe group, where the uplink subframe group is obtained by the network side device according to the interference condition on the uplink subframe;
  • the second processing module 710 is configured to perform uplink channel measurement according to the channel measurement configuration information.
  • the receiving module 700 receives the notification of the uplink subframe included in the uplink subframe group from the network side device.
  • the channel measurement configuration information includes an SRS parameter group.
  • the SRS transmission subframes determined according to the SRS parameter group corresponding to any two uplink subframe groups are different.
  • the second processing module 710 sends the SRS corresponding to the uplink subframe group according to the configured SRS parameter group.
  • the second processing module 710 determines, according to the SRS parameter group corresponding to the uplink subframe group, an SRS transmission subframe that is closest to the uplink subframe group, and is in the SRS transmitter.
  • the SRS corresponding to the uplink subframe group is transmitted on the frame.
  • the second processing module 710 determines, according to the received SRS request information in the PDCCH from the network side device, that the uplink subframe group is the closest according to the SRS parameter group corresponding to the uplink subframe group after determining that the SRS needs to be sent.
  • One SRS transmits a subframe, and transmits an SRS corresponding to the uplink subframe group on the SRS transmission subframe.
  • the bit indicates whether the SRS transmission is triggered.
  • the second processing module 710 transmits the SRS on the subframe n+k; where k > m, m
  • the time is processed for the user equipment in units of subframes, and the subframe n+k is the SRS transmission subframe closest to the subframe n.
  • the SRS request information is a plurality of bits.
  • the second processing module 710 determines an uplink subframe group corresponding to the bit value of the SRS request information according to the correspondence between the uplink subframe group and the bit value, and according to the determined uplink subframe.
  • the SRS parameter group corresponding to the group determines the location of the most recent SRS transmission subframe, and sends the SRS corresponding to the uplink subframe group on the SRS transmission subframe; or determines according to the correspondence between the uplink subframe set and the bit value.
  • An uplink subframe set corresponding to the bit value of the SRS request information and determining, according to the SRS parameter group corresponding to each uplink subframe group in the uplink subframe set, a recent one of the SRS transmission subframes corresponding to the uplink subframe group And transmitting, in each of the determined SRS transmission subframes, an SRS corresponding to the uplink subframe group, where one downlink subframe set includes at least one uplink subframe group.
  • the second processing module 710 sends the SRS on the subframe n+ki; where ki > m, m
  • the processing time is the user equipment in the subframe
  • the subframe n+ki is the SRS transmission subframe corresponding to the i-th uplink subframe group closest to the subframe n, where i is a positive integer less than or equal to N, and i The number of the uplink subframe group to which the SRS needs to be sent, which is triggered by the SRS request information, where N is the number of uplink subframe groups.
  • the SRS transmission corresponding to different uplink subframe groups is determined.
  • the subframe is the same subframe, and the second processing module 710 is configured according to one uplink subframe group in different uplink subframe groups.
  • the SRS parameter group sends an SRS.
  • the embodiment of the present invention further provides a method for performing uplink channel measurement and a method for configuring channel measurement. Since the principle of solving the problem is similar to the system for performing uplink channel measurement in the embodiment of the present invention, these The implementation of the method can be seen in the implementation of the system, and the repetition will not be repeated.
  • the method for configuring channel measurement according to an embodiment of the present invention includes the following steps:
  • Step 801 The network side device divides the uplink subframe into multiple uplink subframe groups according to the interference condition in the uplink subframe.
  • Step 802 The network side device notifies the user equipment of at least one channel measurement configuration information corresponding to the uplink subframe group.
  • the embodiments of the present invention provide two schemes for performing uplink channel measurement, that is, periodic and aperiodic, which are respectively introduced below.
  • the network side device notifies the user equipment of the uplink subframe included in the uplink subframe group in addition to notifying the channel measurement configuration information.
  • the network side device determines the SRS parameter group corresponding to the uplink subframe group, and uses the determined SRS parameter group corresponding to the uplink subframe group as the channel measurement configuration information corresponding to the uplink subframe group.
  • the parameters included in the SRS parameter group can be found in Table 2.
  • the user equipment can periodically perform uplink channel measurement (including reporting) according to the SRS parameter group.
  • the SRS parameter group configured by the network side device to different uplink subframe groups is independent of each other.
  • the SRS transmission subframes determined according to the SRS parameter group corresponding to any two uplink subframe groups are different.
  • the relative position of the subframe is a relative position of the SRS transmission subframe in one SRS transmission period.
  • the network side device and the user equipment can determine the SRS transmission subframe according to the SRS transmission period and the relative position of the subframe.
  • the network side device notifies the user equipment of the uplink subframe included in the uplink subframe group in addition to notifying the channel measurement configuration information.
  • the network side device determines the SRS parameter group corresponding to the uplink subframe group, and uses the determined SRS parameter group corresponding to the uplink subframe group as the channel measurement configuration information corresponding to the uplink subframe group;
  • the user equipment periodically measures the SRS corresponding to the uplink subframe group according to the configured SRS parameter group.
  • the parameters included in the SRS parameter group can be found in Table 2.
  • the SRS parameter group configured by the network side device to different uplink subframe groups is independent of each other.
  • the SRS transmission subframes determined according to the SRS parameter group corresponding to any two uplink subframe groups are different.
  • the relative position of the subframe is a relative position of the SRS transmission subframe in one SRS transmission period.
  • the network side device and the user equipment can determine the SRS transmission subframe according to the SRS transmission period and the relative position of the subframe.
  • the network device After the network side device configures the channel measurement configuration information for the user equipment, the network device needs to trigger the user equipment to trigger the user equipment to send the SRS corresponding to the at least one uplink subframe group. That is to say, not every SRS transmission subframe needs to send an SRS, and it is determined according to the trigger of the network side device 10, which SRS transmission subframe is sent.
  • the network side device may trigger the user equipment to send the SRS corresponding to the at least one uplink subframe group by using the SRS request information in the PDCCH.
  • the SRS request information is carried by the DL grant or UL grant of the PDCCH.
  • the SRS request information is 1 bit, and the bit indicates whether the feedback is triggered.
  • Trigger mode 2 The SRS request information is multi-bit, and the multiple-bit combination of the SRS request information indicates which SRS of the uplink subframe is fed back by the user equipment.
  • the network side device determines, according to the correspondence between the uplink subframe group and the bit value, the bit value corresponding to the uplink subframe group that needs to send the SRS, determines the SRS request information according to the determined bit value, and notifies the determined SRS request information.
  • User equipment determines, according to the correspondence between the uplink subframe group and the bit value, the bit value corresponding to the uplink subframe group that needs to send the SRS, determines the SRS request information according to the determined bit value, and notifies the determined SRS request information.
  • the SRS request information is multi-bit. When there are a large number of uplink subframe groups, the uplink subframe group is further divided into a set, and one set includes more than one uplink subframe group. The multiple bit combinations of the SRS request information are used to indicate which SRS of the uplink subframe group within the set is fed back by the user equipment.
  • the network side device determines, according to the correspondence between the uplink subframe set and the bit value, the bit value corresponding to the uplink subframe set that needs to send the SRS, determines the SRS request information according to the determined bit value, and notifies the determined SRS request information.
  • User equipment wherein, one uplink subframe set includes at least one uplink subframe group.
  • the network side device obtains an uplink channel situation corresponding to the uplink subframe group by receiving the SRS of the user equipment.
  • the method for performing uplink channel measurement includes the following steps:
  • Step 901 The user equipment receives, by the network side device, at least one channel measurement configuration information corresponding to the uplink subframe group, where the uplink subframe group is obtained by the network side device according to the interference condition on the uplink subframe.
  • Step 902 The user equipment performs uplink channel measurement according to the channel measurement configuration information.
  • the embodiments of the present invention provide two schemes for performing uplink channel measurement, that is, periodic and aperiodic, which are respectively introduced below.
  • the user equipment receives the channel measurement configuration information corresponding to the uplink subframe group from the network side device.
  • the notification of the uplink subframe included in the uplink subframe group from the network side device is also received.
  • the network user equipment periodically measures and sends the SRS corresponding to the uplink subframe group according to the configured SRS parameter group.
  • the parameters included in the SRS parameter group can be found in Table 2.
  • the user equipment is different according to the SRS transmission subframe determined by the SRS parameter group corresponding to any two uplink subframe groups.
  • the user equipment For an uplink subframe group, the user equipment performs uplink channel measurement according to the SRS parameter group corresponding to the uplink subframe group, and sends an SRS on the SRS transmission subframe determined according to the corresponding SRS parameter group.
  • the SRS transmission subframes in the SRS parameter group corresponding to different uplink subframe groups may be different. Therefore, it is possible that the SRS transmission subframes corresponding to different uplink subframe groups are the same subframe. For example, if an SRS transmission period is 5 ms and an SRS transmission period is 10 ms, it may happen that the SRS transmission subframes corresponding to different uplink subframe groups are the same subframe.
  • the user equipment determines that the SRS transmission subframes of the different uplink subframe groups are the same feedback subframe according to the SRS parameter group corresponding to the uplink subframe group, the SRS parameters corresponding to one uplink subframe group in different uplink subframe groups.
  • the group sends the SRS. That is, when the SRS transmission subframe positions corresponding to different uplink subframe groups are located in the same subframe, the SRS is sent according to the SRS parameter group of one of the uplink subframe groups.
  • the user equipment receives the channel measurement configuration information corresponding to the uplink subframe group from the network side device, and receives the notification of the uplink subframe included in the uplink subframe group from the network side device.
  • the user equipment periodically measures the SRS corresponding to the uplink subframe group according to the configured SRS parameter group.
  • the parameters included in the SRS parameter group can be found in Table 2.
  • the user equipment is different according to the SRS transmission subframe determined by the SRS parameter group corresponding to any two uplink subframe groups.
  • the SRS transmission subframes in the SRS parameter group corresponding to different uplink subframe groups may be different. Therefore, it is possible that the SRS transmission subframes corresponding to different uplink subframe groups are the same subframe. For example, if an SRS transmission period is 5 ms and an SRS transmission period is 10 ms, it may happen that the SRS transmission subframes corresponding to different uplink subframe groups are the same subframe.
  • the user equipment For an uplink subframe group, the user equipment performs uplink channel measurement according to the SRS parameter group corresponding to the uplink subframe group, and sends the SRS on the SRS transmission subframe determined according to the corresponding SRS parameter group. If the user equipment determines that the SRS transmission subframes of the different uplink subframe groups are the same feedback subframe according to the SRS parameter group corresponding to the uplink subframe group, the SRS parameters corresponding to one uplink subframe group in different uplink subframe groups. The group sends the SRS. That is, when the transmission subframe positions corresponding to different uplink subframe groups are located in the same subframe, the SRS is sent according to the SRS parameter group of one of the uplink subframe groups.
  • the user equipment needs to determine, according to the SRS parameter group corresponding to the uplink subframe group, a SRS transmission subframe of the uplink subframe group after receiving the trigger of the network side device, and The SRS corresponding to the uplink subframe group is transmitted on the SRS transmission subframe.
  • the user equipment determines, according to the received SRS request information in the PDCCH from the network side device 10, the latest one of the uplink subframe group according to the SRS parameter group corresponding to the uplink subframe group after determining that the SRS needs to be sent.
  • the SRS transmits a subframe, and transmits an SRS corresponding to the uplink subframe group on the SRS transmission subframe.
  • the SRS request information is 1 bit, and the bit indicates whether the feedback is triggered.
  • the user equipment sends the SRS on the subframe n+k; where k > m, m is a sub The user equipment processing time in units of frames, and the subframe n+k is the SRS transmission subframe closest to the subframe n.
  • Trigger mode 2 The SRS request information is multi-bit, and the multiple-bit combination of the SRS request information indicates which SRS of the uplink subframe is fed back by the user equipment.
  • the user equipment determines an uplink subframe group corresponding to the bit value of the SRS request information according to the correspondence between the uplink subframe group and the bit value, and determines the latest SRS transmission according to the SRS parameter group corresponding to the determined uplink subframe group.
  • the position of the subframe, and the SRS corresponding to the uplink subframe group is transmitted on the SRS transmission subframe.
  • the user equipment 20 transmits the SRS on the subframe n+ki; where ki > m, m is The user equipment processing time in units of subframes, and the subframe n+ki is an SRS transmission subframe corresponding to the i-th uplink subframe group closest to the subframe n, where i is a positive integer less than or equal to N, and i is The number of uplink subframe groups that need to send SRS triggered by the SRS request information, where N is the number of uplink subframe groups.
  • the SRS request information is multi-bit. When there are a large number of uplink subframe groups, the uplink subframe group is further divided into a set, and one set includes more than one uplink subframe group. The multiple bit combinations of the SRS request information are used to indicate which SRS of the uplink subframe group within the set is fed back by the user equipment.
  • the specific user equipment determines, according to the correspondence between the uplink subframe set and the bit value, the uplink subframe set corresponding to the bit value of the SRS request information, and respectively according to the SRS parameter group corresponding to each uplink subframe group in the uplink subframe set. Determining the location of the most recent SRS transmission subframe corresponding to the uplink subframe group, and respectively determining each SRS The SRS corresponding to the uplink subframe group is sent in the sending subframe, and the at least one uplink subframe group is included in one downlink subframe set.
  • the user equipment sends the SRS on the subframe n+ki;
  • ki > m
  • m is the processing time of the user equipment in units of subframes
  • the subframe n+ki is the SRS transmission subframe corresponding to the i-th uplink subframe group closest to the subframe n
  • i is less than or equal to A positive integer of N
  • i is an uplink subframe group number that needs to be sent by the SRS request information
  • N is the number of uplink subframe groups.
  • FIG. 8 and FIG. 9 can synthesize a process to form a method for performing uplink channel measurement, that is, first performing step 801 and step 802, and then performing step 901 and step 902.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

Des modes de réalisation de la présente invention concernent le domaine technique des communications sans fil, et concernent en particulier un procédé, un système et un dispositif permettant de configurer une mesure de canal et d'effectuer une mesure de canal de liaison montante, utilisée pour l'implémentation dans un système TDD dynamique de la configuration de la mesure de canal et pour les performances de la mesure de canal de liaison montante. Le procédé décrit par les modes de réalisation de la présente invention et qui permet de configurer la mesure de canal comprend les étapes suivantes : la division, par un dispositif côté réseau, de sous-trames de liaison montante en plusieurs groupes de sous-trames de liaison montante sur la base d'interférences sur les sous-trames de liaison montante ; et la notification par le dispositif côté réseau, à un équipement utilisateur, d'informations de configuration de mesure de canal correspondant aux groupes de sous-trames de liaison montante. Du fait que le dispositif côté réseau notifie à l'équipement utilisateur les informations de configuration de mesure de canal correspondant aux multiples groupes de sous-trames de liaison montante divisés sur la base des interférences sur les sous-trames de liaison montante, la configuration de la mesure de canal est implémentée dans le système TDD dynamique.
PCT/CN2013/075821 2012-05-18 2013-05-17 Procédé, système et dispositif permettant de configurer une mesure de canal et d'effectuer une mesure de canal de liaison montante WO2013170782A1 (fr)

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