CN111432442B - Method and device for switching uplink carrier - Google Patents
Method and device for switching uplink carrier Download PDFInfo
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- CN111432442B CN111432442B CN201910018905.4A CN201910018905A CN111432442B CN 111432442 B CN111432442 B CN 111432442B CN 201910018905 A CN201910018905 A CN 201910018905A CN 111432442 B CN111432442 B CN 111432442B
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- uplink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
Abstract
According to the method and the device for switching the uplink carrier waves, the base station calculates the uplink path loss of the UE and obtains the downlink path loss of the UE by determining that the quality of the uplink of the UE does not meet the preset condition, and when the difference value between the uplink path loss and the downlink path loss of the UE is smaller than a preset first difference value, the base station sends a switching request to the UE, wherein the switching request is used for requesting the UE to be switched from the SUL carrier wave to the FDD carrier wave. In the method, the base station determines to switch the SUL carrier and the FDD carrier according to the parameters of the uplink, thereby improving the uplink coverage.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for switching uplink carriers.
Background
With the development of wireless communication technology, mobile communication networks gradually evolve to fifth Generation mobile communication (5-Generation, abbreviated as 5G) networks, and the 5G networks are also called New Radio (NR) networks. In the NR network, Supplementary UpLink (SUL) carriers are introduced to enhance UpLink coverage. The cell configured with the SUL has two uplink carriers: one for SUL carriers and one for non-SUL carriers.
In a Frequency Division Duplex (FDD) and SUL networking scenarios, generally, a service is preferentially performed on a SUL carrier, and a User Equipment (UE) is triggered to perform carrier switching when the quality of a downlink channel is degraded, that is, the SUL carrier is switched to the FDD carrier.
However, in a partial coverage area, the SUL carrier coverage may be far worse than that of the FDD carrier, and at this time, since the downlink channel quality has not yet reached the threshold value for triggering the handover, the base station may not trigger the UE to perform the carrier handover, and the UE still accesses from the SUL carrier with poor coverage, which may cause the UE to drop the network easily, and the user service experience is poor.
Disclosure of Invention
The invention provides a method and a device for switching uplink carriers, which are used for switching SUL carriers and FDD carriers according to parameters of an uplink and improving uplink coverage.
A first aspect of the present invention provides a method for switching an uplink carrier, including:
the base station determines that the quality of an uplink of User Equipment (UE) does not meet a preset condition;
the base station calculates the uplink path loss of the UE;
the base station acquires downlink path loss of the UE;
and when the difference value between the uplink path loss and the downlink path loss of the UE is smaller than a preset first difference value, the base station sends a switching request to the UE, wherein the switching request is used for requesting the UE to switch from the supplementary uplink SUL carrier to the frequency division duplex FDD carrier.
Optionally, the obtaining, by the base station, the downlink path loss of the UE includes:
the base station sends an A2 measurement control message to the UE;
the receiving of an A2 measurement report sent by the UE, wherein the A2 measurement report includes a Cell Reference Signal (CRS) power and a downlink reference signal (DL) received power;
and the base station calculates the downlink path loss of the UE according to the A2 measurement report.
Optionally, when the difference between the uplink path loss and the downlink path loss of the UE is smaller than a preset first difference, before the base station sends the handover request to the UE, the method further includes:
the base station calculates the difference value of the uplink path loss and the downlink path loss of the UE;
the base station judges whether the difference value of the uplink path loss and the downlink path loss of the UE is smaller than the first difference value;
when the difference value between the uplink path loss and the downlink path loss of the UE is not less than the first difference value, the base station sends a switching request to the UE;
when the difference between the downlink path loss and the uplink path loss of the UE is smaller than the first difference, the base station detects whether the quality of an uplink is good;
and if the quality of the uplink is good, the base station issues an A2 measurement stop message to the UE.
Optionally, the determining, by the base station, that the quality of the uplink of the UE does not meet the preset condition includes:
the base station acquires a modulation and coding strategy MCS and an initial block error rate of an uplink data packet of the UE;
and the base station determines that the quality of the uplink does not meet a preset condition according to the MCS and the initial block error rate.
Optionally, the calculating, by the base station, the uplink path loss of the UE includes:
the base station updates the number of Resource Blocks (RBs) allocated to the UE according to the power headroom report;
the base station calculates the uplink path loss by the following formula:
PL_ul＝Pmax-PC(i)-RSRP_ul；
wherein PL _ ul is the uplink path loss, Pmax is the maximum transmit power of the UE, pc (i) is the number of RBs of the UE, and RSRP _ ul is the received power of an RB-level uplink reference signal.
Optionally, the calculating, by the base station, the downlink path loss of the UE according to the measurement report includes:
the base station calculates the downlink path loss by the following formula:
PL_dl＝CSR-p-RSRP_dl；
wherein PL _ dl is the downlink path loss, CSR-P is the CRS power, and RSRP _ dl is the received power of the downlink reference signal.
A second aspect of the present invention provides a method for switching an uplink carrier, including:
user Equipment (UE) accesses an additional uplink SUL carrier;
the UE receives a switching request sent by the base station, wherein the switching request is used for requesting the UE to switch from the SUL carrier to a Frequency Division Duplex (FDD) carrier;
the UE switches the SUL carrier to an FDD carrier according to the switching request;
the UE starts a timer, and the UE is not allowed to switch from the FDD carrier to the SUL carrier until the timer expires.
Optionally, before the UE receives the handover request sent by the base station, the method further includes:
the UE receives an A2 measurement control message sent by a base station;
the UE performs measurement according to the A2 measurement control message;
the UE sends an A2 measurement report to the base station, wherein the A2 measurement report comprises the CRS power of a cell reference signal and the receiving power of a downlink reference signal.
A third aspect of the present invention provides an apparatus for switching an uplink carrier, including:
a determining module, configured to determine that the quality of an uplink of a user equipment UE does not meet a preset condition;
a calculating module, configured to calculate an uplink loss of the UE;
an obtaining module, configured to obtain a downlink path loss of the UE;
and the sending module is used for sending a switching request to the UE when the difference value between the uplink path loss and the downlink path loss of the UE is smaller than a preset first difference value, wherein the switching request is used for requesting the UE to switch from the supplementary uplink SUL carrier to the frequency division duplex FDD carrier.
Optionally, the obtaining module is specifically configured to:
sending an A2 measurement control message to the UE;
receiving an A2 measurement report sent by the UE, wherein the A2 measurement report comprises Cell Reference Signal (CRS) power and downlink reference signal (DL) received power;
and calculating the downlink path loss of the UE according to the A2 measurement report.
Optionally, the system further comprises a judging module and a detecting module;
the calculation module is further configured to calculate a difference between an uplink path loss and a downlink path loss of the UE;
the judging module is configured to judge whether a difference between an uplink path loss and a downlink path loss of the UE is smaller than the first difference;
the sending module is specifically configured to send a handover request to the UE when a difference between an uplink path loss and a downlink path loss of the UE is not smaller than the first difference;
the detection module is configured to detect whether the quality of an uplink is good or not when a difference between the downlink path loss and the uplink path loss of the UE is smaller than the first difference;
the sending module is further configured to issue an a2 measurement stop message to the UE when the quality of the uplink becomes good.
Optionally, the determining module is specifically configured to:
acquiring a modulation and coding strategy MCS and an initial block error rate of an uplink data packet of the UE;
and determining that the quality of the uplink does not meet a preset condition according to the MCS and the initial block error rate.
Optionally, the calculation module is specifically configured to:
updating the number of Resource Blocks (RBs) allocated to the UE according to the power headroom report;
calculating the uplink path loss by the following formula:
PL_ul＝Pmax-PC(i)-RSRP_ul；
wherein PL _ ul is the uplink path loss, Pmax is the maximum transmit power of the UE, pc (i) is the number of RBs of the UE, and RSRP _ ul is the received power of an RB-level uplink reference signal.
Optionally, the calculating the downlink path loss of the UE according to the measurement report specifically includes:
calculating the downlink path loss by the following formula:
PL_dl＝CSR-p-RSRP_dl；
wherein PL _ dl is the downlink path loss, CSR-P is the CRS power, and RSRP _ dl is the received power of the downlink reference signal.
A fourth aspect of the present invention provides an apparatus for switching an uplink carrier, including:
the access module is used for accessing the supplementary uplink SUL carrier wave by the user equipment UE;
a receiving module, configured to receive a handover request sent by the base station, where the handover request is used to request the UE to switch from the SUL carrier to a frequency division duplex, FDD, carrier;
a switching module, configured to switch from the SUL carrier to an FDD carrier according to the switching request;
a starting module, configured to start a timer, and before the timer expires, not allow the UE to switch from the FDD carrier to the SUL carrier.
Optionally, the system further comprises a measuring module and a sending module;
the receiving module is further configured to receive an a2 measurement control message sent by the base station;
the measurement module is used for carrying out measurement according to the A2 measurement control message;
the sending module is configured to send an a2 measurement report to the base station, where the a2 measurement report includes a CRS power of a cell reference signal and a received power of a downlink reference signal.
A fifth aspect of the present invention provides a base station comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the base station to perform the method according to the first aspect of the present invention.
A sixth aspect of the present invention provides a UE comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the UE to perform the method according to the second aspect of the present invention.
A seventh aspect of the present invention provides a computer readable storage medium having stored thereon instructions which, when executed, cause a computer to perform the method according to the first aspect of the present invention.
An eighth aspect of the present invention provides a computer readable storage medium having stored thereon instructions which, when executed, cause a computer to perform the method according to the second aspect of the present invention.
The method and the device for switching the uplink carrier waves comprise the following steps: the base station determines that the quality of an uplink of the UE does not meet a preset condition, calculates the uplink loss of the UE, acquires the downlink loss of the UE, and sends a switching request to the UE when the difference value between the uplink loss and the downlink loss of the UE is smaller than a preset first difference value, wherein the switching request is used for requesting the UE to be switched from the SUL carrier to the FDD carrier. In the method, the base station determines to switch the SUL carrier and the FDD carrier according to the parameters of the uplink, thereby improving the uplink coverage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a network architecture to which the present invention is applicable;
fig. 2 is a flowchart illustrating a method for switching an uplink carrier according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for switching an uplink carrier according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a device for switching an uplink carrier according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a device for switching an uplink carrier according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a base station according to a fifth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a UE according to a sixth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic diagram of a network architecture suitable for use in the embodiment of the present invention, as shown in fig. 1, the network architecture includes a base station and at least one terminal device, and it should be clear that the base station in the present invention may be a base station (e.g., a gNB or a Transmission Point (TRP)) in a 5G system.
A UE referred to in this disclosure may be an access terminal, UE unit, UE station, mobile station, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, or UE device, etc. But may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal in a future 5G Network or a terminal in a future evolved Public Land Mobile Network (PLMN), etc.
Fig. 2 is a flowchart illustrating a method for switching an uplink carrier according to an embodiment of the present invention, as shown in fig. 2, the method according to this embodiment may include:
s101, the base station determines that the quality of the uplink of the UE does not meet a preset condition.
Illustratively, the base station obtains a Modulation and Coding Scheme (MCS) and an Initial Block Error Rate (IBLER) of an uplink data packet of the UE, and determines that the quality of the uplink does not satisfy the preset condition according to the MCS and the Initial Block Error Rate of the uplink data packet.
Specifically, when the base station detects that the MCS of N1 consecutive uplink data packets are all smaller than a preset first threshold, the IBLER statistics is started. The value of N1 may be preconfigured by the higher-level device, and the value of N1 is, for example, 10.
The statistical Period of IBLER (IBLER _ Period) may also be configured in advance by the higher-layer device, and the statistical Period of IBLER is, for example, 500ms, 200ms, or 100ms, which is not limited in this embodiment.
When the statistic period of the IBLER is over, if the number of uplink statistic blocks of the UE in the statistic period reaches a total statistic block number threshold (for example, 15), calculating the IBLER in the statistic period. Assuming that 100 data blocks of the UE are received in the statistical period, wherein 10 data blocks in the initial transmission are erroneous, the IBLER is 10%.
After calculating the IBLER of the uplink data packet of the UE, if the IBLER is greater than or equal to the IBLER threshold, it indicates that the uplink is unstable, and the base station determines that the quality of the uplink of the UE does not meet the preset condition. If the IBLER is smaller than the IBLER threshold value, the uplink is stable, and the quality of the uplink meets the preset condition.
And when the base station detects that the MCS of the continuous N2 uplink data packets is greater than the first threshold value, stopping counting the IBLER, and determining that the quality of the uplink of the UE meets the preset condition.
Step S102, the base station calculates the uplink loss of the UE.
Illustratively, the base station updates the number of RBs allocated to the UE according to a received Power Headroom Report (PHR) sent by the UE, and calculates the uplink loss according to the following formula:
PL_ul＝Pmax-PC(i)-RSRP_ul；
wherein PL _ ul is uplink path loss, Pmax is maximum transmit Power of the UE, pc (i) is the number of RBs of the UE, and RSRP _ ul is Reference Signal Receiving Power (RSRP) of an RB-level uplink Reference Signal.
The PHR includes a power headroom PH of the UE, where the PH refers to a difference between a maximum uplink transmission power allocated by the UE to the base station on a certain carrier and an estimated uplink transmission power used by the UE for uplink transmission.
S103, the base station acquires the downlink path loss of the UE.
Illustratively, the base station transmits an a2 measurement control message to the UE, the a2 measurement control message is used to measure the serving cell signal, and the UE measures the signal of the serving cell according to the a2 measurement control message and transmits to the UE through a measurement report. The base station receives an A2 measurement report sent by the UE, the A2 measurement report includes Cell Reference Signal (CRS) power and downlink Reference Signal received power, and the base station calculates the downlink path loss of the UE according to the A2 measurement report.
The base station calculates the downlink path loss of the UE according to the measurement report, specifically: the base station calculates the downlink path loss by the following formula:
PL_dl＝CSR-p-RSRP_dl；
wherein PL _ dl is downlink path loss, CSR-P is CRS power, and RSRP _ dl is the received power of downlink reference signals.
Step S104, when the difference value between the uplink path loss and the downlink path loss of the UE is smaller than a preset first difference value, the base station sends a switching request to the UE, wherein the switching request is used for requesting the UE to switch from the SUL carrier to the FDD carrier.
Optionally, before step S104, the base station calculates a difference between the uplink path loss and the downlink path loss of the UE, and determines whether the difference between the uplink path loss and the downlink path loss of the UE is smaller than a first difference; when the difference between the uplink path loss and the downlink path loss of the UE is not less than (i.e., greater than or equal to) the first difference, the base station sends the handover request to the UE. And if the difference value between the uplink path loss and the downlink path loss of the UE is larger than or equal to the first difference value, which indicates that the uplink quality is poor, the base station triggers the switching from the SUL carrier to the FDD carrier.
When the difference value between the downlink path loss and the uplink path loss of the UE is smaller than the first difference value, the base station detects whether the quality of the uplink is good, if the quality of the uplink is good, the base station issues an A2 measurement stop message to the UE, and the UE stops measurement after receiving the A2 measurement stop message.
Optionally, when the base station detects that the MCS of N2 consecutive uplink packets are all greater than the first threshold, it is determined that the quality of the uplink becomes better. If the quality of the uplink is not good, the UE continues to make measurements and the upper base station sends an A2 measurement report.
Optionally, after the base station sends the handover request, if a handover response sent by the UE is received within a preset time, it is determined that the UE is successfully handed over, and if a handover response sent by the UE is not received within a preset time, it is determined that the UE is failed to handover.
Optionally, the UE sends a handover response to the base station regardless of whether the handover is successful, where the handover response is used to notify the base station: the UE handover is successful or the handover fails.
In this embodiment, the base station determines that the quality of an uplink of the UE does not satisfy a preset condition, calculates an uplink loss of the UE, and obtains a downlink loss of the UE, and when a difference between the uplink loss and the downlink loss of the UE is smaller than a preset first difference, the base station sends a handover request to the UE, where the handover request is used to request the UE to switch from the SUL carrier to the FDD carrier. The base station determines to switch the SUL carrier and the FDD carrier according to the parameters of the uplink, and the uplink coverage is improved.
Fig. 3 is a flowchart of a method for switching an uplink carrier according to a second embodiment of the present invention, where the first embodiment describes the method from the perspective of a base station, and the present embodiment describes the method from the perspective of a UE, as shown in fig. 3, the method provided in the present embodiment includes the following steps:
step S201, the UE accesses the SUL carrier.
In this embodiment, the SUL carrier is introduced into the cell, and the SUL carrier generally does not have a corresponding downlink carrier. Generally, the SUL carrier will be a low band carrier, the new null ((NR) carrier is a high band carrier, and the supplemental uplink carrier will not become a cell alone for uplink coverage enhancement, but will be paired with a downlink carrier belonging to the cell corresponding to the downlink carrier.
The UE may access the SUL carrier when the UE initially accesses the SUL carrier, or may access the SUL carrier after switching from another cell to the cell, or the UE switches from an FDD carrier of the serving cell to the SUL carrier. The UE may access the SUL carrier in a random access manner, referring to the existing access procedure, which is not described herein again.
Step S202, the UE receives a handover request sent by the base station, where the handover request is used to request the UE to switch from the SUL carrier to the FDD carrier.
Before receiving the handover request sent by the base station, the UE also receives an a2 measurement control message sent by the base station, performs measurement according to the a2 measurement control message, and sends an a2 measurement report to the base station, where the a2 measurement report includes CRS power and received power of downlink reference signals. So that the base station can determine whether to perform uplink carrier switching according to the a2 measurement report.
Step S203, the UE switches from the SUL carrier to the FDD carrier according to the switching request.
Illustratively, the UE accesses the FDD carrier according to the handover request, and completes the handover from the SUL carrier to the FDD carrier.
Step S204, the UE starts a timer, and before the timer expires, the UE is not allowed to switch from the FDD carrier to the SUL carrier.
The timer can be called a penalty timer, and the timing time of the timer can be arbitrarily set according to needs. By starting the timer, the UE is prevented from frequently switching between two uplink carriers.
Optionally, if the UE reestablishes the FDD carrier after the failure of the handover from the FDD carrier to the SUL carrier, a timer may also be set, and before the timer expires, the UE is not allowed to handover from the FDD carrier to the SUL carrier.
In this embodiment, the UE accesses the SUL carrier, the UE receives a handover request sent by the base station, the handover request is used to request the UE to switch from the SUL carrier to the FDD carrier, the UE switches from the SUL carrier to the FDD carrier according to the handover request, the UE starts a timer after accessing the SUL carrier, and the UE is not allowed to switch from the FDD carrier to the SUL carrier before the timer expires. The base station determines to switch the SUL carrier and the FDD carrier according to the parameters of the uplink, and the uplink coverage is improved.
Fig. 4 is a schematic structural diagram of a device for switching an uplink carrier according to a third embodiment of the present invention, where the device may be integrated in a base station, as shown in fig. 4, the device includes:
a determining module 11, configured to determine that the quality of an uplink of a user equipment UE does not meet a preset condition;
a calculating module 12, configured to calculate an uplink loss of the UE;
an obtaining module 13, configured to obtain a downlink path loss of the UE;
a sending module 14, configured to send a switching request to the UE when a difference between an uplink path loss and a downlink path loss of the UE is smaller than a preset first difference, where the switching request is used to request the UE to switch from a supplemental uplink SUL carrier to a frequency division duplex FDD carrier.
Optionally, the obtaining module 13 is specifically configured to:
sending an A2 measurement control message to the UE;
receiving an A2 measurement report sent by the UE, wherein the A2 measurement report comprises Cell Reference Signal (CRS) power and downlink reference signal (DL) received power;
and calculating the downlink path loss of the UE according to the A2 measurement report.
Optionally, the system further comprises a judging module and a detecting module;
the calculating module 12 is further configured to calculate a difference between an uplink path loss and a downlink path loss of the UE;
the judging module is configured to judge whether a difference between an uplink path loss and a downlink path loss of the UE is smaller than the first difference;
the sending module 14 is specifically configured to send a handover request to the UE when a difference between an uplink path loss and a downlink path loss of the UE is not smaller than the first difference;
the detection module is configured to detect whether the quality of an uplink is good or not when a difference between the downlink path loss and the uplink path loss of the UE is smaller than the first difference;
the sending module 14 is further configured to issue an a2 measurement stop message to the UE when the quality of the uplink becomes better.
Optionally, the determining module 11 is specifically configured to:
acquiring a modulation and coding strategy MCS and an initial block error rate of an uplink data packet of the UE;
and determining that the quality of the uplink does not meet a preset condition according to the MCS and the initial block error rate.
Optionally, the calculating module 12 is specifically configured to:
updating the number of Resource Blocks (RBs) allocated to the UE according to the power headroom report;
calculating the uplink path loss by the following formula:
PL_ul＝Pmax-PC(i)-RSRP_ul；
wherein PL _ ul is the uplink path loss, Pmax is the maximum transmit power of the UE, pc (i) is the number of RBs of the UE, and RSRP _ ul is the received power of an RB-level uplink reference signal.
Optionally, the calculating the downlink path loss of the UE according to the measurement report specifically includes:
calculating the downlink path loss by the following formula:
PL_dl＝CSR-p-RSRP_dl；
wherein PL _ dl is the downlink path loss, CSR-P is the CRS power, and RSRP _ dl is the received power of the downlink reference signal.
The apparatus of this embodiment is configured to execute the method of the first embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 5 is a schematic structural diagram of an uplink carrier switching apparatus according to a fourth embodiment of the present invention, where the apparatus may be integrated in a UE, as shown in fig. 5, the apparatus includes:
an access module 21, configured to access, by a user equipment UE, an augmented uplink SUL carrier;
a receiving module 22, configured to receive a handover request sent by the base station, where the handover request is used to request the UE to switch from the SUL carrier to a frequency division duplex, FDD, carrier;
a switching module 23, configured to switch from the SUL carrier to an FDD carrier according to the switching request;
an initiating module 24, configured to initiate a timer, and before the timer expires, not allow the UE to switch from the FDD carrier to the SUL carrier.
Optionally, the system further comprises a measuring module and a sending module;
the receiving module 22 is further configured to receive an a2 measurement control message sent by the base station;
the measurement module is used for carrying out measurement according to the A2 measurement control message;
the sending module is configured to send an a2 measurement report to the base station, where the a2 measurement report includes a CRS power of a cell reference signal and a received power of a downlink reference signal.
The apparatus of this embodiment is configured to execute the method of the second embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 6 is a schematic structural diagram of a base station according to a fifth embodiment of the present invention, and as shown in fig. 6, the base station according to the present embodiment includes: a processor 31, a memory 32, and a transceiver 33, where the memory 32 is configured to store instructions, the transceiver 33 is configured to communicate with other devices, and the processor 31 is configured to execute the instructions stored in the memory 32, so that the base station executes the method according to the first embodiment, and the specific implementation manner and the technical effect are similar, and are not described herein again.
Fig. 7 is a schematic structural diagram of a UE according to a sixth embodiment of the present invention, and as shown in fig. 7, the UE according to this embodiment includes: a processor 41, a memory 42, and a transceiver 43, where the memory 42 is configured to store instructions, the transceiver 43 is configured to communicate with other devices, and the processor 41 is configured to execute the instructions stored in the memory 42, so that the UE executes the method according to embodiment two, and the specific implementation manner and the technical effect are similar, and are not described herein again.
Seventh embodiment of the present invention provides a computer-readable storage medium, which stores instructions that, when executed, cause a computer to perform the method according to the first embodiment of the present invention.
Eighth embodiment of the present invention provides a computer-readable storage medium, which stores instructions that, when executed, cause a computer to execute the method according to second embodiment of the present invention.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. A method for switching an uplink carrier, comprising:
the base station determines that the quality of an uplink of User Equipment (UE) does not meet a preset condition;
the base station calculates the uplink path loss of the UE;
the base station acquires downlink path loss of the UE;
and when the difference value between the uplink path loss and the downlink path loss of the UE is smaller than a preset first difference value, the base station sends a switching request to the UE, wherein the switching request is used for requesting the UE to switch from the supplementary uplink SUL carrier to the frequency division duplex FDD carrier.
2. The method of claim 1, wherein the obtaining, by the base station, the downlink path loss of the UE comprises:
the base station sends an A2 measurement control message to the UE;
the base station receives an A2 measurement report sent by the UE, wherein the A2 measurement report comprises cell reference signal CRS power and downlink reference signal received power;
and the base station calculates the downlink path loss of the UE according to the A2 measurement report.
3. The method of claim 2, wherein before the base station sends the handover request to the UE when a difference between an uplink loss and a downlink loss of the UE is smaller than a preset first difference, the method further comprises:
the base station calculates the difference value of the uplink path loss and the downlink path loss of the UE;
the base station judges whether the difference value of the uplink path loss and the downlink path loss of the UE is smaller than the first difference value;
when the difference value between the uplink path loss and the downlink path loss of the UE is not less than the first difference value, the base station sends a switching request to the UE;
when the difference between the downlink path loss and the uplink path loss of the UE is smaller than the first difference, the base station detects whether the quality of an uplink is good;
and if the quality of the uplink is good, the base station issues an A2 measurement stop message to the UE.
4. The method according to any of claims 1-3, wherein the base station determines that the quality of the uplink of the UE does not satisfy a preset condition, comprising:
the base station acquires a modulation and coding strategy MCS and an initial block error rate of an uplink data packet of the UE;
and the base station determines that the quality of the uplink does not meet a preset condition according to the MCS and the initial block error rate.
5. The method of claim 4, wherein the base station calculates the uplink loss of the UE, and comprises:
the base station updates the number of Resource Blocks (RBs) allocated to the UE according to the power headroom report;
the base station calculates the uplink path loss by the following formula:
PL_ul＝Pmax-PC(i)-RSRP_ul；
wherein PL _ ul is the uplink path loss, Pmax is the maximum transmit power of the UE, pc (i) is the number of RBs of the UE, and RSRP _ ul is the received power of an RB-level uplink reference signal.
6. The method of claim 2, wherein the base station calculates the downlink path loss of the UE according to the measurement report, and comprises:
the base station calculates the downlink path loss by the following formula:
PL_dl＝CSR-p-RSRP_dl；
wherein PL _ dl is the downlink path loss, CSR-P is the CRS power, and RSRP _ dl is the received power of the downlink reference signal.
7. A method for switching an uplink carrier, comprising:
user Equipment (UE) accesses an additional uplink SUL carrier;
the UE receives a switching request sent by a base station when the difference value of the uplink path loss and the downlink path loss of the UE is smaller than a preset first difference value, wherein the switching request is used for requesting the UE to switch from the SUL carrier to a Frequency Division Duplex (FDD) carrier; the difference value of the uplink path loss and the downlink path loss of the UE is determined by the base station;
the UE switches the SUL carrier to an FDD carrier according to the switching request;
the UE starts a timer, and the UE is not allowed to switch from the FDD carrier to the SUL carrier until the timer expires.
8. The method of claim 7, wherein before the UE receives the handover request sent by the base station, the method further comprises:
the UE receives an A2 measurement control message sent by a base station;
the UE performs measurement according to the A2 measurement control message;
the UE sends an A2 measurement report to the base station, wherein the A2 measurement report comprises the CRS power of a cell reference signal and the receiving power of a downlink reference signal.
9. An apparatus for switching an uplink carrier, comprising:
a determining module, configured to determine that the quality of an uplink of a user equipment UE does not meet a preset condition;
a calculating module, configured to calculate an uplink loss of the UE;
an obtaining module, configured to obtain a downlink path loss of the UE;
and the sending module is used for sending a switching request to the UE when the difference value between the uplink path loss and the downlink path loss of the UE is smaller than a preset first difference value, wherein the switching request is used for requesting the UE to switch from the supplementary uplink SUL carrier to the frequency division duplex FDD carrier.
10. An apparatus for switching an uplink carrier, comprising:
the access module is used for accessing the supplementary uplink SUL carrier wave by the user equipment UE;
a receiving module, configured to receive a switching request sent by a base station when a difference between an uplink path loss and a downlink path loss of the UE is smaller than a preset first difference, where the switching request is used to request the UE to switch from the SUL carrier to a frequency division duplex FDD carrier; the difference value of the uplink path loss and the downlink path loss of the UE is determined by the base station;
a switching module, configured to switch from the SUL carrier to an FDD carrier according to the switching request;
a starting module, configured to start a timer, and before the timer expires, not allow the UE to switch from the FDD carrier to the SUL carrier.
11. A base station comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the base station to perform the method of any one of claims 1-6.
12. A user equipment, UE, comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the UE to perform the method of claim 7 or 8.
13. A computer-readable storage medium having instructions stored thereon that, when executed, cause a computer to perform the method of any of claims 1-6.
14. A computer-readable storage medium having stored thereon instructions that, when executed, cause a computer to perform the method of claim 7 or 8.
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| CN113972971B (en) * | 2020-07-23 | 2024-03-15 | 中国移动通信集团吉林有限公司 | Method for adjusting carrier switching threshold and network equipment |
| CN114143866B (en) * | 2020-09-04 | 2023-08-15 | 成都鼎桥通信技术有限公司 | Method, device and storage medium for preventing saturation of receiver uplink |
| MX2023004451A (en) * | 2020-10-23 | 2023-04-28 | Panasonic Ip Corp America | Enhancing uplink transmission with multiple beams. |
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