WO2017045205A1 - Procédé d'envoi d'informations de puissance de signal de référence, et station de base - Google Patents

Procédé d'envoi d'informations de puissance de signal de référence, et station de base Download PDF

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Publication number
WO2017045205A1
WO2017045205A1 PCT/CN2015/090023 CN2015090023W WO2017045205A1 WO 2017045205 A1 WO2017045205 A1 WO 2017045205A1 CN 2015090023 W CN2015090023 W CN 2015090023W WO 2017045205 A1 WO2017045205 A1 WO 2017045205A1
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WIPO (PCT)
Prior art keywords
reference signal
information
cell
subframe
carried
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PCT/CN2015/090023
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English (en)
Chinese (zh)
Inventor
吴作敏
李强
马莎
官磊
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华为技术有限公司
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Priority to PCT/CN2015/090023 priority Critical patent/WO2017045205A1/fr
Priority to CN201580071647.6A priority patent/CN107113153A/zh
Publication of WO2017045205A1 publication Critical patent/WO2017045205A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a base station for transmitting reference signal power information, and a cell handover method and device.
  • the baseband signal contains a low frequency component, it is difficult to transmit the baseband signal directly in the wireless channel.
  • the baseband signal needs to be modulated onto a carrier with a higher frequency to implement the baseband signal.
  • Transmission where the carrier is a carrier on the licensed spectrum.
  • the carrier is a carrier on the licensed spectrum.
  • mobile access and wireless data traffic are exponentially growing, triggering a growing demand for radio spectrum.
  • the use of carriers on the unlicensed spectrum is introduced for communication, thereby achieving the purpose of network capacity shunting, thereby reducing the load on the licensed spectrum.
  • LTE Long Term Evolution
  • LAA-LTE Licensed-Assisted Access Using LTE
  • U-LTE Unlicensed Long Term Evolution, Licensing-free long-term evolution (system)
  • CCA Carrier Channel Assessment
  • the maximum transmit power of different frequency bands on the unlicensed spectrum is fixed.
  • the base station When the base station is at a certain When multiple carriers are transmitted in one frequency band, multiple carriers share the maximum transmit power. For example, suppose there are eight 20M bandwidth carriers in a certain frequency band, and the maximum transmission power of this frequency band is 30dBm. When the device transmits data on only one carrier, the maximum transmit power allowed is 30 dBm; when the device transmits data on 2, 4, and 8 carriers, the maximum allowed transmit power is 27 dBm, 24 dBm, and 21 dBm, respectively.
  • the transmit power of the DRS is unchanged.
  • the UE separately measures the DRS periodically sent by the base station and the DRS of multiple neighboring cells.
  • the RRM (Radio Resource Management) measurement result of each cell is obtained, and the RRM measurement results of each cell are combined and averaged to obtain an RRM measurement result reported to the base station to which the serving cell of the UE belongs.
  • the UE reports the RRM measurement result of the multiple cells to the base station to which the serving cell belongs, and the base station determines whether to perform cell handover on the UE by using the RRM measurement result of the multiple cells reported by the UE.
  • the number of carriers on the unlicensed spectrum that the base station can compete for each time the DRS is transmitted is different due to the LBT mechanism, so that the number of carriers available in the base station is dynamically changed. Therefore, the transmission power of the DRS of the cell may change. Therefore, applying the RRM measurement mode of the existing DRS may cause the UE to incorrectly combine the DRS measurement results under the transmission power of different DRSs, thereby causing the base station to determine whether An error occurred while switching the cell.
  • the number of carriers that the base station can transmit in each transmission may be different due to the LBT mechanism.
  • the maximum transmit power of different frequency bands on the unlicensed spectrum is fixed.
  • the base station sends multiple carriers in a certain frequency band, multiple carriers share the maximum transmit power.
  • the base station can transmit up to 8 carriers in the frequency band, and the transmit power of the DRS on each carrier when the number of carriers that can be used for communication changes. There are four cases as follows:
  • Case 1 The semi-static change of the transmit power of the DRS on each carrier is P/N.
  • the transmit power of the DRS is 1/N of the total power, and N is the number of carriers that are allowed to be simultaneously transmitted at the time of transmitting the DRS determined by the base station in a period of time.
  • N is the number of carriers that are allowed to be simultaneously transmitted at the time of transmitting the DRS determined by the base station in a period of time.
  • a disadvantage of this scheme is that when N is less than 8 and the base station obtains a transmission opportunity greater than the number of N carriers, the base station can only use N due to power limitation. The carriers communicate, causing waste of resources.
  • Another disadvantage of this scheme is that the coverage of the base station is related to N. The larger the value of N, the smaller the coverage of the base station.
  • Case 2 The semi-static change of the transmit power of the DRS on each carrier is the maximum transmit power P.
  • the base station only allows the DRS to be transmitted through one carrier regardless of the competition on the carriers on the unlicensed spectrum, so that the transmit power of the DRS of the cell does not change, and the maximum base station coverage is obtained, but Caused a serious waste of resources.
  • Case 3 The semi-static change of the transmit power of the DRS on each carrier when the cell is off is the maximum transmit power P; the transmit power of the DRS on each carrier dynamically changes with the number of carriers that obtain the transmission opportunity when the cell is turned on.
  • Case 4 The transmit power of the DRS on each carrier dynamically varies with the number of carriers that have received the transmission opportunity.
  • Case 3 and Case 4 which allow the dynamic transmission of the DRS on each carrier to dynamically change, are preferred, and therefore, on the basis of Cases 3 and 4. How to transmit the transmit power of the DRS of the cell to the UE, so that the UE can accurately determine the measurement result of the RRM, so that the base station accurately switching the serving cell becomes a problem that needs to be solved urgently.
  • the embodiment of the invention provides a method for transmitting reference signal power information and a base station, which is used to solve the problem that how to transmit the power of the DRS when the transmit power of the DRS on each carrier dynamically changes with the number of carriers that obtain the transmission opportunity.
  • the UE is sent to enable the UE to accurately determine the measurement result of the RRM.
  • a method for transmitting reference signal power information including:
  • the base station Determining, by the base station, a reference signal and first information, the first information being used to indicate the reference signal Transmitting power information, the reference signal and the first information are used for mobility management of the user equipment UE;
  • the base station sends the reference signal and the first information to the UE, where the reference signal and the first information are carried in the same subframe.
  • the reference signal and the first information are carried in the same subframe, including:
  • the reference signal is carried on a subframe, and the first information is indicated by a representation of the reference signal;
  • the reference signal is carried on a subframe, and the first information is carried on an idle resource of the subframe.
  • the first information is carried on the idle resource of the subframe, including:
  • the first information is carried in a sequence on an idle resource of the subframe.
  • the first information is carried on the idle resource of the subframe in a manner of orthogonal phase shift keying QPSK modulation symbols.
  • the first information includes at least one of the following:
  • a ratio of a transmit power value of the reference signal, a transmit power value of the reference signal to a predefined maximum power value that the reference signal is capable of transmitting, a transmit power value of the reference signal, and a predefined reference signal An offset value of a maximum power value that can be transmitted, a sequence number of the transmit power value of the reference signal in a predefined set of transmit power values, and a number of carriers used by the base station to transmit the subframe in which the reference signal is located.
  • the reference signal is a discovery reference signal DRS.
  • the DRS and the first information are carried in the same subframe, including:
  • the DRS is carried on a subframe, and the table of the primary synchronization signal PSS in the DRS is passed.
  • Present form indicating the first information
  • the DRS is carried on one subframe, and the first information is indicated by a representation of a secondary synchronization signal SSS in the DRS; and/or
  • the DRS is carried in a subframe, and the first information is indicated by a representation of a cell-specific reference signal CRS in the DRS; and/or
  • the DRS is carried in one subframe, and the first information is indicated by a representation form of a channel state information reference signal CSI-RS in the DRS.
  • a method for cell handover including:
  • the user equipment UE receives the reference signal and the first information of the serving cell, and receives the reference signal and the first information of the at least one neighboring cell of the serving cell; wherein, each of the serving cell and the at least one neighboring cell
  • the reference signal of the cell and the first information are carried in the same subframe, and the first information of the cell is used to indicate the transmit power information of the reference signal of the cell;
  • the UE Transmitting, by the UE, the first RRM measurement result of the serving cell and the first RRM measurement result corresponding to the at least one neighboring cell to the base station where the serving cell is located, where the base station where the serving cell is located is used according to the Determining whether to switch the UE from a serving cell to a neighboring cell by using a first RRM measurement result corresponding to the serving cell and the at least one neighboring cell respectively.
  • the determining, by the UE, the first RRM measurement result of the corresponding cell according to the reference signal of the cell and the determined transmit power of the reference signal including:
  • the UE measures the second RRM according to the determined transmit power of the reference signal
  • the normalization process is performed to obtain the first RRM measurement result.
  • the determining, by the UE, the first RRM measurement result of the corresponding base station according to the reference signal of the cell and the determined transmit power of the reference signal including:
  • the UE searches for a corresponding relationship between the transmit power of the historical reference signal and the transmit power of the determined reference signal in the corresponding relationship between the at least one historical RRM measurement result of each cell and the transmit power of the historical reference signal.
  • the result obtained by normalizing the value is taken as the first RRM measurement result of the corresponding cell.
  • the method further includes:
  • the UE reports the second information to the base station where the serving cell is located, where the second information is used to indicate the transmit power information of the reference signal corresponding to the first RRM measurement result, where the first RRM measurement result And the second information is carried on the same subframe.
  • the reference signal of the cell and the first information are carried in the same subframe, including:
  • the reference signal of the cell is carried in one subframe, and the first information of the cell is indicated by the representation form of the reference signal of the cell;
  • the reference signal of the cell is carried in one subframe, and the first information of the cell is carried on the idle resource of the subframe.
  • the first information of the cell is carried on the idle resource of the subframe, including:
  • the first information of the cell carries the idle resources of the subframe in which the reference signal of the cell is located in a sequence manner. Source; or
  • the first information of the cell is carried on the idle resource of the subframe where the reference signal of the cell is located in the manner of orthogonal phase shift keying QPSK modulation symbols.
  • the first information of the cell includes at least one of the following:
  • the ratio of the transmit power value of the reference signal of the cell, the transmit power value of the reference signal of the cell to the maximum power value that the reference signal of the predefined cell can transmit, the transmit power value of the reference signal of the cell, and the reference signal of the predefined cell The offset value of the maximum power value that can be transmitted, the sequence number of the transmit power value of the reference signal of the cell in the predefined set of transmit power values, and the carrier used by the base station where the cell is located when transmitting the subframe in which the reference signal is located number.
  • the reference signal of the cell is the discovery reference signal DRS.
  • the DRS and the first information are carried in the same subframe, including:
  • the DRS is carried on a subframe, and the first information is indicated by a representation of a primary synchronization signal PSS in the DRS; and/or
  • the DRS is carried on one subframe, and the first information is indicated by a representation of a secondary synchronization signal SSS in the DRS; and/or
  • the DRS is carried in a subframe, and the first information is indicated by a representation of a cell-specific reference signal CRS in the DRS; and/or
  • the DRS is carried in one subframe, and the first information is indicated by a representation form of a channel state information reference signal CSI-RS in the DRS.
  • a third aspect provides a base station that transmits reference signal power information, including:
  • a first processor configured to determine a reference signal and first information, where the first information is used to indicate transmit power information of the reference signal, and the reference signal and the first information are used for mobility of a user equipment UE management;
  • a first transceiver configured to send the reference signal and the first information to the UE, where the reference The signal and the first information are carried on the same subframe.
  • the reference signal and the first information are carried in the same subframe, including:
  • the reference signal is carried on a subframe, and the first information is indicated by a representation of the reference signal;
  • the reference signal is carried on a subframe, and the first information is carried on an idle resource of the subframe.
  • the first information is carried on the idle resource of the subframe, including:
  • the first information is carried in a sequence on an idle resource of the subframe.
  • the first information is carried on the idle resource of the subframe in a manner of orthogonal phase shift keying QPSK modulation symbols.
  • the first information includes at least one of the following:
  • a ratio of a transmit power value of the reference signal, a transmit power value of the reference signal to a predefined maximum power value that the reference signal is capable of transmitting, a transmit power value of the reference signal, and a predefined reference signal An offset value of a maximum power value that can be transmitted, a sequence number of the transmit power value of the reference signal in a predefined set of transmit power values, and a number of carriers used by the base station to transmit the subframe in which the reference signal is located.
  • the reference signal is a discovery reference signal DRS.
  • the DRS and the first information are carried in the same subframe, including:
  • the DRS is carried on a subframe, and the first information is indicated by a representation of a primary synchronization signal PSS in the DRS; and/or
  • the DRS is carried on one subframe, and the first information is indicated by a representation of a secondary synchronization signal SSS in the DRS; and/or
  • the DRS is carried in a subframe, and the first information is indicated by a representation of a cell-specific reference signal CRS in the DRS; and/or
  • the DRS is carried in one subframe, and the first information is indicated by a representation form of a channel state information reference signal CSI-RS in the DRS.
  • the fourth aspect provides a device for cell handover, including:
  • a second transceiver configured to receive a reference signal and first information of the serving cell, and receive a reference signal and first information of the at least one neighboring cell of the serving cell; wherein the serving cell and the at least one phase
  • the reference signal and the first information of each cell in the neighboring cell are carried in the same subframe, and the first information of the cell is used to indicate the transmit power information of the reference signal of the cell;
  • a second processor configured to determine, according to the first information of the serving cell, a transmit power of a reference signal of the serving cell, and determine, according to a reference signal of the serving cell and a determined transmit power of the reference signal, The first radio resource management RRM measurement result of the serving cell;
  • the second processor is further configured to determine, according to the first information of the neighboring cell, a transmit power of a reference signal of the neighboring cell, and according to the reference signal of the neighboring cell and the determined reference Determining, by the transmit power of the signal, a corresponding first RRM measurement result of the neighboring cell;
  • the second transceiver is further configured to report, to the base station where the serving cell is located, the first RRM measurement result of the serving cell and the first RRM measurement result corresponding to the at least one neighboring cell, respectively, for The base station where the serving cell is located determines whether to switch the UE from the serving cell to a neighboring cell according to the first RRM measurement result corresponding to the serving cell and the at least one neighboring cell respectively.
  • the second processor is specifically configured to:
  • the second processor is specifically configured to:
  • the second transceiver is further configured to:
  • the reference signal of the cell and the first information are carried in the same subframe, including:
  • the reference signal of the cell is carried in one subframe, and the first information of the cell is indicated by the representation form of the reference signal of the cell;
  • the reference signal of the cell is carried in one subframe, and the first information of the cell is carried on the idle resource of the subframe.
  • the first information of the cell is carried on the idle resource of the subframe, including:
  • the first information of the cell is carried in a sequence on the idle resource of the subframe where the reference signal of the cell is located;
  • the first information of the cell is carried on the idle resource of the subframe where the reference signal of the cell is located in the manner of orthogonal phase shift keying QPSK modulation symbols.
  • the first information of the cell includes at least one of the following situations:
  • the ratio of the transmit power value of the reference signal of the cell, the transmit power value of the reference signal of the cell to the maximum power value that the reference signal of the predefined cell can transmit, the transmit power value of the reference signal of the cell, and the reference signal of the predefined cell The offset value of the maximum power value that can be transmitted, the sequence number of the transmit power value of the reference signal of the cell in the predefined set of transmit power values, and the carrier used by the base station where the cell is located when transmitting the subframe in which the reference signal is located number.
  • the reference signal of the cell is the discovery reference signal DRS.
  • the DRS and the first information are carried in the same subframe, including:
  • the DRS is carried on a subframe, and the first information is indicated by a representation of a primary synchronization signal PSS in the DRS; and/or
  • the DRS is carried on one subframe, and the first information is indicated by a representation of a secondary synchronization signal SSS in the DRS; and/or
  • the DRS is carried in a subframe, and the first information is indicated by a representation of a cell-specific reference signal CRS in the DRS; and/or
  • the DRS is carried in one subframe, and the first information is indicated by a representation form of a channel state information reference signal CSI-RS in the DRS.
  • the first information of the reference signal and the transmit power information for indicating the reference signal is sent together by the bearer on the same subframe, so that the first information on each carrier is obtained along with the transmission opportunity.
  • the UE can be timely sent to the UE, so that the UE can accurately determine the RRM measurement result according to the first information and the reference signal sent by the current base station, so that the serving base station of the UE can accurately determine. Whether to switch the serving cell to the neighboring cell improves the accuracy of the cell handover.
  • FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for transmitting reference signal power information according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a subframe used to carry a DRS and first information according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a DRS pattern according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method for cell handover according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a method for cell handover according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a base station transmitting reference signal power according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a device for cell handover according to an embodiment of the present invention.
  • the base station of the embodiment of the present invention determines the reference signal and the first information, where the first information is used to indicate the transmit power information of the reference signal, the reference signal and the first information are used for mobility management of the user equipment UE, and then sent to the UE.
  • the reference signal and the first information are carried on the same subframe.
  • the bearer since the base station transmits the reference signal and the first information for indicating the transmission power information of the reference signal, the bearer is transmitted together on the same subframe, so that the first information on each carrier is sent along with the transmission.
  • the UE can be sent to the UE in time, so that the UE can accurately determine the RRM measurement result according to the first information and the reference signal sent by the current base station, so that the serving base station of the UE can accurately It is determined whether to switch the serving cell to the neighboring cell, which improves the accuracy of the cell handover.
  • an application scenario of an embodiment of the present invention includes:
  • the base station 103 is a base station of the serving cell of the UE 104, and is configured to send, to the UE 104, a reference signal of the serving cell of the base station 103 and indication information for indicating the transmit power of the reference signal;
  • the base station 101 and the base station 102 are base stations of neighboring cells, and are used to send the parameters of the neighboring cells to the UE 104. a test signal and indication information for indicating a transmit power of the reference signal;
  • the UE 104 is configured to determine the RRM measurement result of each cell and report it to the base station 103 after receiving the reference signal sent by the base station 101, the base station 102, and the base station 103, and the indication information for indicating the transmit power of the reference signal.
  • the base station 103 is caused to determine whether to switch the serving cell of the UE 104.
  • one base station can cover more than one cell.
  • the same base station can transmit signals to multiple different cells in the same carrier frequency by means of radio remote sensing.
  • the base station can simultaneously transmit on multiple carrier frequencies (or carriers), such as carrier F1, carrier F2, carrier F3, and carrier F4, based on the carrier aggregation capability of the base station.
  • a signal such as DRS in general, can be considered to be equivalent to the concept of a carrier and a cell, that is, four cells belonging to the same base station can be considered to be transmitting a signal DRS.
  • the carrier aggregation capability of the UE is generally smaller than the carrier aggregation capability of the base station, assuming that one UE can simultaneously receive signals transmitted by cells operating in F1 and F2, the cells operating at F1 and F2 can be regarded as serving cells of the UE.
  • the UE's measurements for F1 and F2 can be considered as intra-frequency measurements, and the measurements for F3 and F4 can be considered as inter-frequency measurements.
  • the neighboring cell can be understood as a cell on a different frequency than the frequency of the serving cell of the UE, that is, a cell that can be detected on the corresponding carrier frequency when the UE performs the inter-frequency measurement or a network side device.
  • the notified cell (the base station may notify the UE of the Cell ID (Cell Identity) of the cell that the UE wants to measure); the neighboring cell may also be understood as another cell that is the same as the UE serving cell but different from the UE serving cell.
  • the neighboring cell and the serving cell may belong to one serving base station, or may belong to different serving base stations.
  • a neighboring cell is understood as another cell of an inter-frequency that belongs to the same serving base station as the serving cell of the UE, in the above example, a cell that transmits a signal such as DRS at F3 and F4 may be regarded as a phase of the UE. Neighboring cell.
  • a method for transmitting reference signal power information includes:
  • Step 200 The base station determines a reference signal and first information, where the first information is used to indicate transmit power information of the reference signal, where the reference signal and the first information are used for mobility management of the user equipment UE.
  • Step 201 The base station sends the reference signal and the first information to the UE, where the reference signal and The first information is carried on the same subframe.
  • the UE in all embodiments of the present invention may be a mobile phone, a computer or a portable, pocket-sized, hand-held, computer-integrated, in-vehicle mobile device capable of exchanging voice and/or data with a wireless access network, etc.
  • Radio Access Network a terminal device that communicates with one or more core networks.
  • the base station in all the embodiments of the present invention may be an eNB (Evolved Node B), a macro base station, a micro base station, a pico base station, an AP (Access Point, an access point), a TP (Transmission Point, a transmission site), and an RRH. (Remote Radio Head, remote wireless port), etc.
  • eNB evolved Node B
  • macro base station a macro base station
  • micro base station a micro base station
  • a pico base station a base station
  • AP Access Point, an access point
  • TP Transmission Point
  • TP Transmission Point
  • RRH Remote Radio Head
  • the reference signals of all the embodiments of the present invention are mainly used for mobility management of the UE, and may be DRS, CRS (Cell-specific Reference Signals), CSI-RS (CSI-reference signals), The PRS (Positioning Reference Signal), or other reference signals having the same or similar functions, is not limited in the present invention.
  • the mobility management of the UE refers to ensuring the communication service quality of the UE.
  • the base station where the current serving cell is located selects the UE with the strongest signal strength from the plurality of cells, and switches the current serving cell to the UE for receiving. The process of the cell with the strongest signal strength.
  • the reference signal and the first information that are determined and sent by the base station are used for the mobility management of the UE, and the UE that receives the reference signal and the first information may be the reference signal and the first information.
  • the UE of the local cell may also be the UE of the neighboring cell of the local cell corresponding to the reference signal and the first information.
  • the reference signal and the first information sent by the base station include: a reference signal and a first information of the serving cell, and also include a reference signal and first information of the neighboring cell.
  • the first information may include at least one of the following conditions: reference letter The value of the transmit power value, the ratio of the transmit power value of the reference signal to the maximum power value that the predefined reference signal can transmit, the offset value of the transmit power value of the reference signal and the maximum power value that the predefined reference signal can transmit, The sequence number of the transmit power value of the reference signal in the predefined set of transmit power values, and the number of carriers used by the subframe in which the base station transmits the reference signal.
  • the maximum power value that the predefined reference signal can transmit may be the maximum transmit power value that the base station is allowed to use; the maximum power value that the predefined reference signal can transmit may also be allowed to be used by the base station.
  • the maximum power value that can be transmitted by the predefined reference signal may be explicitly specified in the standard, or may be notified to the UE by using RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the first signal includes at least two of them, it is similar to the case of including one, and details are not described herein again.
  • the first information includes a transmit power value of the reference signal; and if the transmit power value of the reference signal is 30 dBm, the first information includes a transmit power value of the reference signal of 30 dBm;
  • the first information includes a ratio of a transmit power value of the reference signal to a maximum power value that the predefined reference signal can transmit; in a specific implementation, the transmit power value of the reference signal and the pre-defined reference signal can be transmitted maximum.
  • the ratio of the power value corresponds to the preset index number. Taking Table 1 as an example, assuming that the ratio of the transmit power value of the current reference signal to the maximum power that can be transmitted by the predefined reference signal is 1/2, the first information is Including index number 1, the index number is used to indicate the ratio of the transmit power value of the pre-reference signal to the maximum power that the predefined reference signal can transmit.
  • the first information includes an offset value of the transmit power value of the reference signal and a maximum power value that the predefined reference signal can transmit; assuming that the transmit power value of the reference signal is 15 dBm, and the maximum power value that the defined reference signal can transmit 30dBm, the transmit power value of the reference signal and the predefined
  • the offset value of the maximum power value that the reference signal can transmit is -15 dBm.
  • the offset value of the transmit power value of the reference signal and the maximum power value that can be transmitted by the predefined reference signal is preset with an index number.
  • the first information includes the index number 2, and the index reference is used to indicate the previous reference.
  • the offset value of the transmit power value of the signal and the maximum power that the predefined reference signal can transmit may also be an absolute value of a difference between a transmit power value of the reference signal and a maximum power value that the predefined reference signal can transmit.
  • the index number Offset value (dBm) 0 0 1 -10 2 -15 3 -20
  • the first information includes a sequence number of the transmit power value of the reference signal in a predefined set of transmit power values, and the transmit power value of the reference signal in Table 3 and the transmit power value of the reference signal are in a predefined set of transmit power values.
  • the corresponding relationship of the sequence numbers is described as an example. It is assumed that the base station determines that the transmit power of the reference signal is 20 dBm, and the transmit power value of the reference signal has a sequence number of 2 in the predefined set of transmit power values. Therefore, the first information includes the No. 2.
  • the first information includes the number of carriers used by the subframe in which the base station sends the reference signal.
  • the transmit power value of the reference signal the number of carriers used by the subframe in which the base station transmits the reference signal, and the preset
  • the index number is corresponding to the following. Table 4 is taken as an example for description. If the transmit power value of the reference signal determined by the base station is 24 dBm, the first information includes the index number 3, and the index number is used to indicate the subframe in which the base station transmits the reference signal. The number of carriers is 4.
  • the transmit power value of the reference signal may be replaced by a ratio of a transmit power value of the reference signal to a maximum power value that the predefined reference signal can transmit, or a transmit power value of the reference signal and a predefined parameter.
  • the power value of the reference signal may be represented by the number of carriers used by the subframe in which the base station transmits the reference signal, because the maximum power value that the predefined reference signal can transmit is a fixed value, assuming that multiple carriers share the maximum transmission fairly. Power, so the base station can determine the transmit power on each carrier according to the number of carriers that obtain the opportunity to use.
  • the base station determines, by using a contention method, the number of carriers that obtain the use right on the unlicensed spectrum; wherein, in an optional preferred manner, the base station determines, according to the LBT criterion, the acquired usage right by using a competitive method. The number of carriers.
  • the base station may determine the number of carriers for acquiring the usage right by using a pre-configured resource usage pattern.
  • the reference signal and the first information are carried in the same subframe, and the subframe may be any one subframe.
  • the reference signal and the first information are carried in the same subframe.
  • the specific implementation manner is: the reference signal is carried in a subframe, and the first information.
  • the first information includes 1, 2, and 3.
  • the reference signal sequence is generated by the initial value X, and the reference signal sequence is represented by indicating that the first information is 1, and when the first information is 2.
  • the representation means that the first information is 3.
  • the initial value generated by the reference signal sequence may be X, Y, or Z by the content of the first information being 1, 2, or 3. This way of indicating different first information through different sequences does not require additional resources.
  • the DRS when the reference signal is a DRS, the DRS includes a PSS (Primary Synchronization Signal), an SSS (Secondary Synchronization Signal), and a CRS, so that the reference signal and the first information are carried in the DRS.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS C-RNTI
  • the DRS is carried on one subframe, and the first information is indicated by a representation of the primary synchronization signal PSS in the DRS; and/or
  • the DRS is carried on one subframe, and the first information is indicated by a representation of the secondary synchronization signal SSS in the DRS;
  • the DRS is carried on one subframe, and the first information is indicated by a representation of the cell-specific reference signal CRS in the DRS.
  • the DRS further includes a CSI-RS (CSI reference signals), and therefore, the reference signal and the first information are carried in the same subframe, and may also be:
  • CSI-RS CSI reference signals
  • the DRS is carried on one subframe, and the first information is indicated by a representation of the channel state information reference signal CSI-RS in the DRS.
  • 300 denotes a subframe carrying PSS/SSS in one DRS burst
  • 301 denotes a symbol occupied by a synchronization signal in one DRS burst
  • 311 denotes a symbol synchronization on a symbol occupied by a synchronization signal in one DRS burst.
  • RE (Resource Element) 310 denotes an RE that is not occupied by the synchronization signal in the symbol occupied by the synchronization signal in one DRS burst
  • 302 denotes the symbol occupied by the CRS in one DRS burst
  • 321 denotes a DRS burst in one time.
  • the RE occupied by the CRS on the symbol occupied by the CRS 320 indicates the RE that is not occupied by the CRS in the symbol occupied by the CRS in one DRS burst; 303 indicates the symbol that is not occupied by the synchronization signal and the CRS in one DRS burst, and 331 indicates a DRS.
  • the REs in the burst that are not occupied by the symbols occupied by the synchronization signal and the CRS, 330, represent the idle REs on the symbols that are not occupied by the synchronization signal and the CRS in one DRS burst. Since the CSI-RS is optional, The CSI-RS is not included in Figure 3. When the CSI-RS is configured in the DRS, the CSI-RS is transmitted on 331.
  • the DRS needs to be sent for both the on and off cells.
  • the resources in 320, 310, and 330 and 331 can be used to transmit the physical downlink channel, for example, PDCCH (Physical Downlink Channel). Control channel), PDSCH (Physical Downlink Shared Channel), etc.; when the DRS is transmitted in the cell in the off state, the resources in 320, 310, and 330 do not transmit information, wherein the resources in 331 It is also possible that no information will be transmitted.
  • different first information may be indicated by different representations of sequences in the PSS, SSS, CRS, or CSI-RS in the DRS.
  • the first information is carried on the 321 by different representations of the CRS sequence in the DRS. . This approach does not require additional resources.
  • the representation of the CRS in the DRS is indicated by the representation of the PSS, the SSS, or the CSI-RS in the DRS.
  • the representation of the CRS in the DRS is indicated.
  • the first information is similar and will not be described here.
  • the representation of the CRS sequence generated by generating the initialization parameters of the CRS sequence indicates the first information.
  • the initialization parameters are determined according to the following formula:
  • c init represents an initialization parameter that is not generated by the CRS sequence indicating the first information
  • N 1st represents the first information
  • c′ init represents an initialization parameter that is generated by the CRS sequence indicating the first information.
  • the c init in the LTE system using the unlicensed spectrum resource may be the same as the initialization parameter generated by the CRS sequence in the LTE system, or may be different.
  • the initialization parameters generated by the CRS sequence in the c init and LTE systems are the same,
  • n s represents a slot number within a radio frame; Indicates the cell identifier of the cell that sends the CRS sequence.
  • N CP indicates the subframe type of the current subframe. Specifically, 1 indicates that the current subframe is a normal CP (Cyclic Prefix) format, and 0 indicates that the current subframe is a long CP format. .
  • the first information is used to indicate that the transmit power of the reference signal is 15 dBm, and the corresponding parameter N 1st is N 0 , then N 0 is brought into the initialization parameter calculation formula to obtain a reference indicating the first information.
  • a signal sequence representation assuming that the first information is used to indicate that the transmit power of the reference signal is 20 dBm, and the corresponding parameter N 1st is N 1 , then the N 1 is brought into the initialization parameter calculation formula to obtain a reference indicating the first information. The representation of the signal sequence.
  • An improved DRS pattern includes two sync signal symbols 401 and two CRS symbols 400, wherein the sync signal symbols are used to carry synchronization signals, and the synchronization signals include PSS and SSS.
  • a PSS or SSS occupies 6 PRBs (Physical Resource Blocks).
  • each of the labels 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 in FIG. 4 is used to transmit one PSS or SSS. Therefore, it is also possible to carry different first information by using different mapping patterns of PSS and/or SSS in the frequency domain in the DRS, as shown in FIG. 4, and 0-9 represent symbols for carrying PSS and/or SSS, Suppose that the SSS is carried on the 1, 4, 5, 8, and 9 symbols, the PSS is carried on the 2, 3, 6, 7, 0 symbols to indicate the first information 1; the SSS is carried on the 1, 3, 5, 7, and 9 symbols. The PSS is carried on the 2, 4, 6, 8, 0 symbols to indicate the first information 2; the mapping pattern obtained by other means for carrying the PSS and/or SSS represents the corresponding first information.
  • step 201 another implementation manner in which the reference signal and the first information are carried in the same subframe is: the reference signal is carried in a subframe, and the first information is carried in the idle of the subframe. Resources.
  • the first information is carried in a sequence on the idle resource of the subframe; or the first information is in a quadrature phase shift keying QPSK (Quadrature Phase Shift Keyin)
  • QPSK Quadrature Phase Shift Keyin
  • the first information includes 1, 2, and 3, which are respectively represented by different sequences A, B, and C. If the first information that needs to be transmitted is 2, the sequence B and the reference signal representing 2 are carried in the same subframe. Up, sequence B needs to occupy some or all of the resources that are not occupied by the reference signal on the subframe.
  • the DRS is taken as an example for specific description.
  • the reference signal is a reference signal other than the DRS, the manner in which the reference signal and the first information are carried in the same subframe is similar, and details are not described herein again.
  • the method is: the DRS is carried on a resource in a subframe for carrying the symbol of the DRS, where the first information is carried on an idle resource in the subframe for carrying a symbol of the DRS.
  • the first information is carried in a sequence on the idle resource of the symbol used to carry the DRS in the subframe; or the first information is a quadrature phase shift keying QPSK modulation symbol.
  • the mode is carried on the idle resource of the symbol used to carry the DRS in the subframe.
  • the first information may be carried on the 320 and/or the 310. Specifically, the first information is carried on the RE that is not occupied by the CRS in the symbol occupied by the CRS in the first DRS burst.
  • the information may be carried in a sequence on 320, wherein the first information may be represented by a CAZAC (Constant Amplitude Zero Auto Correlation) sequence, or a pseudo-random sequence; or the first information is modulated by QPSK symbols.
  • the representation, that is, the first information includes four cases, which can be represented by 2 bits, which can be combined with the original bits representing other control information by encoding and QPSK modulation to obtain QPSK modulation symbols and mapped onto the resources indicated by 320.
  • the DRS is carried on a resource in a subframe for carrying the symbol of the DRS
  • the first information is carried on an idle resource in the subframe for carrying symbols other than the symbol of the DRS.
  • the first information is carried in a sequence on an idle resource of the symbol other than the symbol for carrying the DRS in the subframe; or the first information is switched by orthogonal phase shift keying
  • the manner of the QPSK modulation symbol is carried on the idle resource of the symbol other than the symbol for carrying the DRS in the subframe.
  • the first information may be carried on the 330, specifically, carried by the first information.
  • an idle RE of a symbol that is not occupied by a DRS in a DRS burst is used as an example, and the first information may be carried in a sequence on the 330, where the first information may be represented by a CAZAC sequence, or a pseudo-random sequence; or, A message is represented by a QPSK modulation symbol, that is, assuming that the first information includes four cases, which can be represented by 2 bits, which can be combined with the original bits representing other control information by encoding and QPSK modulation to obtain QPSK modulation symbols and mapped to 330 indicates the resources.
  • the reference signal is other reference signals, it is similar to DRS and will not be described here.
  • the subframe in which the DRS is located also carries a physical downlink channel such as a PDCCH or a PDSCH. Therefore, optionally, the first information may also be carried on the PDCCH of the subframe where the DRS is located.
  • the base station needs to pass the LBT to obtain the transmission opportunity on the unlicensed spectrum channel. Since one transmission opportunity may include more than one subframe, optionally, the first information may also be carried in the DRS. On the PDCCH of any subframe in the transmission opportunity.
  • the preamble radio preamble sequence
  • the first information may also be carried on the preamble in the transmission opportunity where the DRS is located.
  • the first information is carried in the idle of the subframe.
  • the resource refers to a resource reserved in the subframe for the first information to be reserved by the reference signal.
  • the reference signal is a DRS
  • the subframe for carrying the DRS does not send the physical downlink channel when the cell is off. Therefore, when the cell is off, the idle resource of the subframe in which the DRS is located is not used to carry the physical.
  • the idle channel of the downlink channel when the cell is opened, the subframe for carrying the DRS sends the physical downlink channel, so when the cell is opened, the first information can be carried to the subframe where the DRS is located, A resource that is not occupied by the DRS is reserved for the first information in the subframe in which the DRS is located. Therefore, when the cell is opened, the idle resource used to carry the first information in the subframe where the DRS is located Is a reserved resource.
  • the base station may notify the UE of the indication information of the resource for carrying the first information reserved in the subframe in which the DRS is located in a manner that is predefined or signaling, so that the UE is in the physical of the subframe in which the DRS is located.
  • rate matching is performed according to the indication information.
  • the base station will use the reference signal and the transmit power signal for indicating the reference signal.
  • the first information of the information is transmitted by the bearer on the same subframe, so that the first information on each carrier can be sent to the UE in time when the number of carriers of the transmission opportunity dynamically changes, so that the UE
  • the RRM measurement result can be accurately determined according to the first information and the reference signal sent by the current base station, so that the serving base station of the UE can accurately determine whether to switch the serving cell to the neighboring cell, thereby improving the accuracy of the cell handover. .
  • a method for cell handover includes:
  • Step 500 The user equipment UE receives the reference signal and the first information of the serving cell, and receives the reference signal and the first information of the at least one neighboring cell of the serving cell, where each of the serving cell and the at least one neighboring cell The reference signal and the first information are carried in the same subframe, and the first information of the cell is used to indicate the transmit power information of the reference signal of the cell;
  • Step 501 The UE determines, according to the first information of the serving cell, the transmit power of the reference signal of the serving cell, and determines the first radio resource management RRM measurement result of the serving cell according to the reference signal of the serving cell and the transmit power of the determined reference signal. ;
  • Step 502 Determine, according to the first information of the neighboring cell, a transmit power of the reference signal of the neighboring cell, and determine, according to the reference signal of the neighboring cell and the transmit power of the determined reference signal, the first RRM of the corresponding neighboring cell. Measurement result
  • the UE reports the first RRM measurement result of the serving cell and the first RRM measurement result corresponding to the at least one neighboring cell to the base station where the serving cell is located, and is used by the base station where the serving cell is located according to the serving cell and the at least one neighboring cell. Determining whether to handover the UE from the serving cell to a neighboring cell, respectively, corresponding to the first RRM measurement result.
  • the UE can receive the reference signal and the first information corresponding to the serving cell and the neighboring cell through the physical downlink channel, so that the UE can determine the transmit power of the reference signal according to the first information, so that the UE
  • the first radio resource management RRM measurement result corresponding to each cell is determined to be relatively accurate according to the reference signal of each cell and the transmit power of the determined reference signal, thereby improving whether to determine whether to handover the UE from the serving cell to a neighboring cell.
  • the method for including the content, the representation, the bearer resource, the sending manner, and the like of the first information of the cell is included in the first information described in Embodiment 1 of the present invention.
  • the methods of content, presentation, bearer resources, and sending mode are the same, and are not described here.
  • the RRM measurement result includes at least one of: a DRS-based reference signal received power RSRP measurement result, and a DRS-based reference signal strength indication RSSI measurement result, based on the DRS.
  • the reference signal of the CRS receives the quality RSRQ measurement result, and the interference measurement result obtained based on the idle resource of the subframe in which the DRS is located.
  • the method for determining the first radio resource management RRM measurement result corresponding to the base station is: the UE determines the second RRM measurement result according to the reference signal of the cell; and according to the determined transmit power of the reference signal, the second The RRM measurement results are normalized to obtain the first RRM measurement result.
  • the second RRM measurement result is normalized according to the reference reference signal transmission power for normalization, to obtain a first RRM measurement result.
  • the reference reference signal transmit power used for normalization may be the maximum power value that can be transmitted by the predefined reference signal on the base station side, or may be predefined by the base station side and independent of the maximum power value that the reference signal can transmit.
  • the reference reference signal transmit power used for normalization may be explicitly specified in the standard, or may be notified by the base station to the UE through RRC signaling.
  • the RRM measurement result is an example of the DRS-based RSRP measurement result
  • the UE compares the received DRS and the first information, the DRS and the first information sent by the cell 2 to the cell 1 and the cell. 2 Perform RRM measurement as an example for explanation.
  • Cell 1 is a serving cell of the UE
  • cell 2 is a neighboring cell of the UE. It is assumed that the UE determines that the second RSRP measurement result of the cell 1 is -23 dBm according to the DRS of the cell 1, and the UE determines that the transmit power of the DRS of the cell 1 is 24 dBm according to the first information of the cell 1.
  • the UE determines the cell 2 according to the DRS of the cell 2.
  • the second RSRP measurement result is -20 dBm, and the transmit power of the DRS of the cell 2 determined by the UE according to the first information of the cell 2 is 30 dBm.
  • the UE performs power compensation or normalization on the second RSRP measurement result according to the determined transmit power of the DRS, and obtains a first RSRP measurement result when the transmit power of the DRS of the cell is assumed to be the same. For example, it is assumed that the reference DRS transmission power used for normalization is notified to the UE by the base station through RRC signaling, and the reference DRS transmission power value is 30 dBm, and the UE obtains the first RSRP measurement result of the cell 1 by normalization processing.
  • the first RSRP measurement result of the cell 2 is -20dBm.
  • the second RSRP measurement result of cell 1 is smaller than the second RSRP measurement result of cell 2
  • the first RSRP measurement result of cell 1 is larger than the first RSRP measurement result of cell 2. That is, for the UE, when the cell 1 and the cell 2 transmit the DRS using the same power, the signal strength of the cell 1 received by the UE is stronger than the signal strength of the cell 2. Therefore, the UE reports the normalized first RSRP measurement result, so that the base station where the serving cell is located can avoid the wrong handover of the UE and frequently switch the cell.
  • the UE searches for the same transmit power of the determined reference signal in the corresponding relationship between the stored at least one historical RRM measurement result of each cell and the transmit power of the historical reference signal.
  • the historical RRM measurement result corresponding to the transmission power of the historical reference signal, and determining the current RRM measurement result according to the reference signal of the cell;
  • the UE compares the current RRM measurement result and the average value of the found at least one historical RRM measurement result as the first RRM measurement result of the corresponding cell, or performs an average of the current RRM measurement result and the found at least one historical RRM measurement result.
  • the result obtained after the normalization process is taken as the first RRM measurement result of the corresponding cell.
  • the correspondence between the at least one historical RRM measurement result of each cell and the transmit power of the historical reference signal stored by the UE before the reference signal and the first information of the at least one neighboring cell of the serving cell and the serving cell are received by the UE;
  • the UE receives the reference signal and the first information of the cell 1 and the cell 2 4 times, wherein the correspondence between the historical RRM measurement result stored by the UE and the transmit power of the historical reference signal, and the current RRM measurement result and current reference
  • the correspondence between the transmit power of the signal is as shown in Table 5.
  • the correspondence between the current RRM measurement result and the transmit power of the current reference signal is the correspondence between the fourth RRM measurement result and the transmit power of the reference signal.
  • the RRM measurement results of the reference signal whose transmission power is 24 dBm are found to be -8 dBm, -7 dBm, -9 dBm, and the three measurement results are taken.
  • the average value is -8 dBm as the first RRM measurement result for the corresponding cell 1.
  • the average value is normalized, that is, the normalized reference signal has a transmission power of 27 dBm, and the normalized average value is -5 dBm, which is the first RRM measurement result corresponding to the cell 1.
  • the RRM measurement result of the reference signal whose transmission power is 21 dBm is found to be -9 dBm, -10 dBm, and the two measurement results are averaged.
  • the average value is normalized, that is, the normalized to reference signal transmission power is 27 dBm, and the normalized average value is obtained as -3.5 dBm as the first RRM measurement result of the corresponding cell 2.
  • determining the first radio resource management RRM measurement result of the corresponding cell may be: the UE stores the reference signal of the cell and determines according to the first information after receiving the reference signal and the first information of the cell each time. Corresponding relationship of the transmit power of the reference signal; then, in the stored correspondence, the UE searches for a reference signal corresponding to the transmit power of the determined reference signal of the current secondary cell;
  • the second RRM measurement result reported by the UE to the base station where the serving cell is located may not be the normalized first RRM measurement result.
  • the UE reports the second information to the base station where the serving cell is located, where the second information is used. Transmitting power information for indicating a reference signal corresponding to the first RRM measurement result, where the first RRM measurement result and the second information are carried on the same subframe; or
  • the UE reports the transmit power information of the reference signal corresponding to the first RRM measurement result to the base station where the serving cell is located, where the transmit power information of the reference signal and the first RRM measurement result are carried in the same subframe.
  • the first RRM measurement result determined by the base station can determine whether the UE is the transmit power of the reference signal of the cell by reporting the second information, so that the base station can accurately determine whether the cell is a received signal for the UE. Good community.
  • the second information may include at least one of a transmit power value of the reference signal, a ratio of a transmit power value of the reference signal to a maximum power value that the predefined reference signal can transmit, and a transmit power value of the reference signal.
  • the offset value of the maximum power value that can be transmitted by the predefined reference signal, the sequence number of the transmit power value of the reference signal in the predefined set of transmit power values, the number of carriers used by the subframe in which the base station transmits the reference signal, and the receiving reference The ratio of the power of the signal to the transmit power of the reference signal (when the power is expressed as a value), the difference between the power of the received reference signal and the transmit power of the reference signal (when the power is expressed in dBm or dB).
  • the transmit power information used to indicate the reference signal corresponding to the first RRM measurement result may be the transmit power information itself, or may be information indicating the transmit power information.
  • the transmit power of the DRS on each carrier is dynamically changed when the number of carriers that can be used for communication is dynamically changed, whether the current service of the UE is switched is determined by the transmit power of the DRS and the DRS.
  • the cell avoids the application of the existing RRS measurement method of DRS.
  • the UE is caused to perform error combining on the DRS measurement results of the transmit powers of different DRSs, thereby causing the base station to make an error when determining whether to perform handover of the cell.
  • a method for cell handover includes:
  • the user equipment UE receives the reference signal and the first information of the at least one neighboring cell of the serving cell and the serving cell; wherein, for any cell, the reference signal of the cell and the first information are carried in the same subframe, The first information of the cell is used to indicate transmit power information of the reference signal of the cell;
  • Step 601 The UE performs, for each of the serving cell and the at least one neighboring cell, determining, according to the reference signal and the first information of the cell, the first RRM measurement result and the second information of the cell.
  • Step 602 The UE reports the determined second information of the at least one neighboring cell of the serving cell and the serving cell and the first RRM measurement result of each cell to the base station where the serving cell is located;
  • Step 603 The base station where the serving cell is located determines whether to perform handover of the serving cell according to the received second information of the determined serving cell and the at least one neighboring cell of the serving cell and the first RRM measurement result of each cell.
  • the manner of determining the first RRM measurement result of the cell includes at least one of the following situations:
  • Case 1 Determine the first RRM measurement result of the cell according to the reference signal of the cell and the first information. It should be noted that, in this embodiment, the method for determining the first RRM measurement result of the cell according to the reference signal and the first information of the cell, and the reference signal and the first information according to the cell described in Embodiment 2 of the present invention The method for determining the first RRM measurement result of the cell is the same, and details are not described herein again.
  • Case 2 The first RRM measurement result of the cell is determined according to the reference signal of the cell. It should be noted that the first RRM measurement result is the result of no normalization process. It is considered that the transmission power of the reference signal may change each time the reference signal is transmitted, and the first RRM measurement result is the result of a single measurement.
  • the manner of determining the second information of the cell includes at least one of the following situations:
  • the second information of the cell is determined.
  • the second information and the first information represent the same content, that is, the second information may also include at least one of the following: the transmit power value of the reference signal, the transmit power value of the reference signal, and the predefined reference signal.
  • the ratio of the maximum power value transmitted, the offset value of the transmit power value of the reference signal to the maximum power value that the predefined reference signal can transmit, the sequence number of the transmit power value of the reference signal in the predefined set of transmit power values, and the base station The number of carriers used to transmit the subframe in which the reference signal is located.
  • Case 2 determining the second information of the cell according to the reference signal of the cell and the first information.
  • the power of the received reference signal is determined according to the reference signal
  • the transmit power of the reference signal is determined according to the first information
  • the second information is a comparison value of the power of the received reference signal and the transmit power of the reference signal.
  • the second information is information indicating a ratio of the power of the received reference signal to the transmit power of the reference signal; when the power is expressed in dBm or dB, the second information is used for Information indicating a difference between the power of the received reference signal and the transmission power of the reference signal.
  • one implementation manner is:
  • the base station where the serving cell is located determines the transmit power of the reference signal of the corresponding cell according to the second information of each cell; and normalizes the first RRM measurement result of the cell according to the determined transmit power of the reference signal of the corresponding cell. Processing, obtaining a second RRM measurement result, and determining, according to the second RRM measurement result, whether to perform handover of the serving cell.
  • step 603 Another optional implementation manner in step 603 is:
  • the base station where the serving cell is located determines the transmit power of the reference signal of the corresponding cell according to the second information of each cell, and stores the correspondence between the determined first RRM measurement result and the transmit power of the determined reference signal, where the stored relationship is stored.
  • searching for a first RRM measurement result corresponding to the transmit power of the reference signal currently transmitted by the determined cell and then calculating the current first RRM measurement result and the found at least one first RRM measurement
  • the average of the results as a result of the second RRM measurement of the corresponding cell, or normalized by the average of the current first RRM measurement result and the found at least one first RRM measurement result, For the second RRM measurement result of the corresponding cell, determining whether to perform handover of the serving cell according to the second RRM measurement result.
  • step 603 Another optional implementation manner in step 603 is:
  • the base station where the serving cell is located determines the comparison value between the power of the received reference signal of the corresponding cell and the transmit power of the reference signal according to the second information of each cell; and the transmission of the reference reference signal according to the determined corresponding cell and the transmission of the reference signal
  • the comparison value of the power is processed, and the first RRM measurement result of the cell is processed to obtain a second RRM measurement result, and according to the second RRM measurement result, whether to perform handover of the serving cell is determined.
  • the embodiment of the present invention further provides a base station that transmits reference signal power information, and a method corresponding to a base station that transmits reference signal power information is a method for transmitting reference signal power information according to an embodiment of the present invention,
  • a base station that sends the reference signal power information in the embodiment of the present invention reference may be made to the implementation of the method, and the repeated description is omitted.
  • a base station that transmits reference signal power information includes:
  • the first processor 700 is configured to determine a reference signal and first information, where the first information is used to indicate transmit power information of the reference signal, and the reference signal and the first information are used for movement of a user equipment UE sexual management;
  • the first transceiver 701 is configured to send the reference signal and the first information to the UE, where the reference signal and the first information are carried in the same subframe.
  • the reference signal and the first information are carried in the same subframe, including:
  • the reference signal is carried on a subframe, and the first information is indicated by a representation of the reference signal;
  • the reference signal is carried on a subframe, and the first information is carried on an idle resource of the subframe.
  • the first information is carried on the idle resource of the subframe, and includes:
  • the first information is carried in a sequence on an idle resource of the subframe.
  • the first information is carried on the idle resource of the subframe in a manner of orthogonal phase shift keying QPSK modulation symbols.
  • the first information includes at least one of the following situations:
  • a ratio of a transmit power value of the reference signal, a transmit power value of the reference signal to a predefined maximum power value that the reference signal is capable of transmitting, a transmit power value of the reference signal, and a predefined reference signal An offset value of a maximum power value that can be transmitted, a sequence number of the transmit power value of the reference signal in a predefined set of transmit power values, and a number of carriers used by the base station to transmit the subframe in which the reference signal is located.
  • the reference signal is a discovery reference signal DRS.
  • the DRS and the first information are carried in the same subframe, including:
  • the DRS is carried on a subframe, and the first information is indicated by a representation of a primary synchronization signal PSS in the DRS; and/or
  • the DRS is carried on one subframe, and the first information is indicated by a representation of a secondary synchronization signal SSS in the DRS; and/or
  • the DRS is carried in a subframe, and the first information is indicated by a representation of a cell-specific reference signal CRS in the DRS; and/or
  • the DRS is carried in one subframe, and the first information is indicated by a representation form of a channel state information reference signal CSI-RS in the DRS.
  • the embodiment of the present invention further provides a device for cell handover.
  • the method for cell handover is a cell handover method according to an embodiment of the present invention.
  • the device refer to the implementation of the method, and the repeated description is not repeated.
  • the device for cell handover includes:
  • a second transceiver 800 configured to receive a reference signal and first information of a serving cell, and receive a reference signal and first information of at least one neighboring cell of the serving cell, where each of the serving cell and the at least one neighboring cell
  • the reference signal of the cell and the first information are carried in the same subframe, and the first information of the cell is used to indicate the transmit power information of the reference signal of the cell;
  • the second processor 801 is configured to determine, according to the first information of the serving cell, a transmit power of the reference signal of the serving cell, and according to the reference signal of the serving cell and the transmit power of the determined reference signal, Determining a first radio resource management RRM measurement result of the serving cell;
  • the second processor 801 is further configured to determine, according to the first information of the neighboring cell, a transmit power of the reference signal of the neighboring cell, and determine a corresponding phase according to the reference signal of the neighboring cell and the transmit power of the determined reference signal.
  • the second transceiver 800 is further configured to report, to the base station where the serving cell is located, the first RRM measurement result of the serving cell and the first RRM measurement result corresponding to the at least one neighboring cell, respectively, where the serving cell is located according to the serving cell and Determining, by the first RRM measurement result corresponding to the at least one neighboring cell, whether to handover the UE from the serving cell to a neighboring cell.
  • the second processor 801 is specifically configured to:
  • the second RRM measurement result is normalized according to the determined transmit power of the reference signal to obtain a first RRM measurement result.
  • the second processor 801 is specifically configured to:
  • the second transceiver 800 is further configured to:
  • the second information is reported to the base station where the serving cell is located, where the second information is used to indicate the transmit power information of the reference signal corresponding to the first RRM measurement result, where the first RRM measurement result and the second information are carried in the same subframe.
  • the reference signal of the cell and the first information are carried in the same subframe, including:
  • the reference signal of the cell is carried in one subframe, and the representation of the reference signal passing through the cell refers to Showing the first information of the cell; or
  • the reference signal of the cell is carried in one subframe, and the first information of the cell is carried on the idle resource of the subframe.
  • the first information of the cell is carried on the idle resource of the subframe, including:
  • the first information of the cell is carried in a sequence on the idle resource of the subframe where the reference signal of the cell is located;
  • the first information of the cell is carried on the idle resource of the subframe where the reference signal of the cell is located in the manner of orthogonal phase shift keying QPSK modulation symbols.
  • the first information of the cell includes at least one of the following situations:
  • the ratio of the transmit power value of the reference signal of the cell, the transmit power value of the reference signal of the cell to the maximum power value that the reference signal of the predefined cell can transmit, the transmit power value of the reference signal of the cell, and the reference signal of the predefined cell The offset value of the maximum power value that can be transmitted, the sequence number of the transmit power value of the reference signal of the cell in the predefined set of transmit power values, and the number of carriers used by the base station where the cell is located when transmitting the subframe in which the reference signal is located.
  • the reference signal of the cell is a discovery reference signal DRS.
  • the DRS and the first information are carried in the same subframe, including:
  • the DRS is carried on one subframe, and the first information is indicated by the representation of the primary synchronization signal PSS in the DRS; and/or
  • the DRS is carried on one subframe, and the first information is indicated by the representation of the secondary synchronization signal SSS in the DRS;
  • the DRS is carried on one subframe, and the first information is indicated by the representation of the cell-specific reference signal CRS in the DRS; and/or
  • the DRS is carried on one subframe, and the first information is indicated by the representation form of the channel state information reference signal CSI-RS in the DRS.
  • the base station in the embodiment of the present invention determines the reference signal and the first information, where the first information is used to indicate the transmit power information of the reference signal, and the reference signal and the first information are used by the user equipment UE. Mobility management, then sending a reference signal and first information to the UE, the reference The signal and the first information are carried on the same subframe.
  • the base station since the base station transmits the reference signal and the first information for indicating the transmission power information of the reference signal, the bearer is transmitted together on the same subframe, so that the first information on each carrier is sent along with the transmission.
  • the UE can be sent to the UE in time, so that the UE can accurately determine the RRM measurement result according to the first information and the reference signal sent by the current base station, so that the serving base station of the UE can accurately It is determined whether to switch the serving cell to the neighboring cell, which improves the accuracy of the cell handover.
  • the user equipment involved in each embodiment may also be a terminal device.
  • the terminal device can be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal
  • RAN Radio Access Network
  • the computers for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • a wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point.
  • Remote Terminal Access Terminal, User Terminal, User Agent, User Device, or User Equipment.
  • embodiments of the present invention can be provided as a method, apparatus (device), 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 invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, read-only optical disks, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, read-only optical disks, optical storage, etc.
  • the present invention is made with reference to a method, apparatus (device) and computer program according to an embodiment of the present invention.
  • the flow chart and/or block diagram of the product is described. It will be understood that a combination of the processes and/or blocks in the flowcharts and/or ⁇ RTIgt;
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • 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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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne le domaine technique des communications, et en particulier un procédé servant à envoyer des informations de puissance de signal de référence et une station de base, destinés à être utilisés pour résoudre le problème lié à la façon d'envoyer une puissance d'émission d'un DRS à un UE lorsque la puissance d'émission du DRS sur chaque porteuse est modifiée de façon dynamique, de sorte que l'UE puisse déterminer avec précision un résultat de mesure RRM. Le procédé comprend les étapes suivantes dans lesquelles : une station de base détermine un signal de référence et des premières informations, et envoie ensuite le signal de référence et les premières informations à un UE, le signal de référence et les premières informations étant portés sur une même sous-trame. Dans la solution technique, une station de base envoie un signal de référence et des premières informations utilisés pour indiquer des informations de puissance d'émission du signal de référence ensemble en portant le signal de référence et les premières informations sur une même sous-trame, de sorte que les premières informations sur chaque porteuse puissent être envoyées à un UE à temps, au fur et à mesure que le nombre de porteuses acquérant des opportunités d'envoi est modifié dynamiquement, de sorte que l'UE puisse déterminer avec précision un résultat de mesure RRM en fonction des premières informations et du signal de référence envoyé par une station de base actuelle.
PCT/CN2015/090023 2015-09-18 2015-09-18 Procédé d'envoi d'informations de puissance de signal de référence, et station de base WO2017045205A1 (fr)

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CN201580071647.6A CN107113153A (zh) 2015-09-18 2015-09-18 一种发送参考信号功率信息的方法及基站

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