CN112217587A - Channel switching method, base station, user equipment and system - Google Patents
Channel switching method, base station, user equipment and system Download PDFInfo
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- CN112217587A CN112217587A CN201910629952.2A CN201910629952A CN112217587A CN 112217587 A CN112217587 A CN 112217587A CN 201910629952 A CN201910629952 A CN 201910629952A CN 112217587 A CN112217587 A CN 112217587A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
Abstract
The application relates to a channel switching method, a base station, user equipment and a system. The method comprises the following steps: receiving information indicating that it has a full duplex communication function from a user equipment; sending a control signaling informing the user equipment of activating the full duplex communication function to the user equipment; and after the user equipment completes initialization of the self-interference module, scheduling full-duplex transmission for the user equipment, wherein the base station also configures a full-duplex mode timer and notifies the user equipment of the configuration of the full-duplex mode timer.
Description
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a channel switching method, a base station, a user equipment, and a system.
Background
With the rapid development of mobile communication technology, mobile data services are increasing after the commercialization of 4 th generation (4G) communication systems, and especially, the rapid growth of high definition video and ultra high definition video services puts higher demands on the transmission rate of wireless communication.
To meet the ever-increasing mobile traffic demands, new techniques are needed to further increase the throughput of wireless communication systems. Unlike the traditional half-duplex system which adopts time domain (time division duplex, TDD) or frequency domain (frequency division duplex, FDD) orthogonal division in uplink and downlink, the full-duplex system allows uplink and downlink of users to transmit simultaneously on the same time frequency resource, so the transmission rate of the full-duplex system can theoretically reach twice that of the half-duplex system. For the above reasons, the full-duplex technology can further improve the utilization rate of the frequency spectrum on the existing system.
The application of full duplex technology needs to overcome two main problems: firstly, self-interference, namely interference of transmission of equipment to reception; and secondly, co-channel interference among different user equipment in the same cell, namely the interference of uplink user equipment to downlink user equipment using the same time-frequency resource.
For self-interference, some techniques are now available to achieve better self-interference cancellation performance, for example, the method proposed in the document "Full duplex radios, d.bharadia, e.mcmilin, s.katti, 2013" can reduce the self-interference by more than 110dB, which basically reduces the self-interference below the noise. For co-channel interference between different ues in a cell, a main method adopted at present is to reduce interference of uplink-transmitted ues to downlink-received ues through scheduling. In order to perform efficient scheduling of the ue, the base station needs to acquire information about interference strength between different ues.
A simple way to obtain the information about the interference strength between ues is to estimate the interference strength between users by obtaining the location information of the users, for example, the interference strength between different ues that are far away from each other is small, and the interference strength between different ues that are close to each other is large, so that when the base station schedules the ues on the same time-frequency resource, a pair of ues that are far away from each other can be selected to schedule uplink and downlink transmissions respectively. The scheduling method based on the location information of the ue may reduce co-channel interference between different ues to some extent, but if the location information of the ue is not accurately estimated (e.g., the accuracy of the current positioning method based on Reference Signal Time Difference (RSTD) is about ten meters, and the accuracy of the positioning method based on GPS is several meters), the corresponding scheduling performance may be greatly affected.
If user equipment with full-duplex communication function exists in the system, the base station needs to ensure that the self-interference elimination module of the user equipment works normally when the base station schedules the full-duplex communication for the user equipment. To ensure this, some special signaling needs to be designed.
In addition, if the system bandwidth is relatively wide and the ue supports transmission over a relatively small bandwidth, the base station may switch the ue to a different channel in order to equalize the ues on the channels, where the channel switching includes switching of frequency points or bandwidth changes, as shown in fig. 1. When a ue with full duplex communication function is switched to another channel, the parameter configuration of the self-interference cancellation module may be applicable or not applicable on a new channel, so that it is necessary to make some stipulations on the step of channel switching and the state of the ue on the new channel to enable the base station to accurately schedule the ue on the channel after switching.
The above information is provided merely as background information to aid in understanding the present disclosure. No determination is made as to whether any of the above would be applicable as prior art with respect to the present disclosure, nor is an assertion made.
Disclosure of Invention
The object of the present application is to solve at least one of the above technical drawbacks. By the channel switching method, the base station, the user equipment and the system, the full-duplex communication can be effectively scheduled for the user equipment, so that the utilization rate of a frequency spectrum is improved.
According to an aspect of the present application, there is provided a method of activating full duplex communication of a user equipment by a base station in a communication system, the method comprising: receiving information indicating that it has a full duplex communication function from a user equipment; sending a control signaling informing the user equipment of activating the full duplex communication function to the user equipment; after the user equipment completes initialization of the self-interference module, full duplex transmission is scheduled for the user equipment; the base station also configures a full duplex mode timer and informs the user equipment of the configuration of the full duplex mode timer.
According to another aspect of the present application, the base station allocates uplink resources to the user equipment, which causes the user equipment to perform initialization on the self-interference module.
According to another aspect of the application, a base station schedules a half-duplex transmission to the user equipment within a time T of sending control signaling, where T depends on a time required for the user equipment to perform initialization for a self-interference module.
According to another aspect of the application, the base station schedules full duplex transmission for the user equipment after T time for the base station to send the control signaling until the full duplex mode timer times out.
According to another aspect of the application, the base station allocates uplink resources to the user equipment to update coefficients of its self-interference cancellation module.
According to another aspect of the present application, a base station switches channels to the user equipment while maintaining full duplex communication of the user equipment.
According to another aspect of the present application, a base station allocates a number of uplink resources to the user equipment to perform initialization of a self-interference cancellation module while switching channels to the user equipment.
According to another aspect of the present application, the base station schedules half-duplex transmission to the user equipment after switching channels thereto, and reactivates a full-duplex communication function of the user equipment and schedules full-duplex transmission thereto.
According to another aspect of the application, the base station informs the user equipment to use the same full duplex timer as before the handover or to start a new full duplex timer.
According to another aspect of the present application, before and after channel switching, the distance between two frequency points is smaller than the first frequency point threshold Δ f1And have the same channel bandwidth, or have the same frequency point and the difference between the two channel bandwidths is less than the first bandwidth threshold delta B1。
According to another aspect of the present application, before and after channel switching, the distance between two frequency points is greater than the first frequency point threshold Δ f1But less than the second bin threshold deltaf2And have the same channel bandwidth, or have the same frequency point and the difference between the two channel bandwidths is greater than the first bandwidth threshold delta B1But less than a second bandwidth threshold deltab2。
According to another aspect of the present application, before and after channel switching, the distance between two frequency points is greater than the second frequency point threshold Δ f2And has the same channel bandwidth, or has the same frequency point and the difference between the two channel bandwidths is larger than a second bandwidth threshold delta B2。
According to another aspect of the present application, the user equipment initializes the self-interference cancellation module by using uplink resources previously allocated by the base station.
According to another aspect of the present application, the base station receives information about interference strength between user equipments measured by the user equipments and residual self-interference strength thereof from the user equipments, and updates a user pairing situation table and a user interference strength information table based on the information, and the base station schedules transmission of users based on the user pairing situation table or the user interference strength information table.
According to another aspect of the present application, the base station uses corresponding levels to quantize the interference strength between the ue and the residual self-interference strength of the ue in the ue interference strength information table.
According to another aspect of the application, the base station performs channel switching on the user equipment, and determines whether to update the user pairing situation table and the user interference strength information table based on a difference between channels before and after switching.
According to another aspect of the present application, there is provided a method of activating full duplex communication at a user equipment in a communication system, the method comprising: sending information indicating that the user equipment has a full-duplex communication function to a base station; receiving control signaling from the base station informing the user equipment of activating a full duplex communication function; and after completing initialization of a self-interference module, receiving scheduling of the base station for full duplex transmission; wherein the user equipment further receives a notification from the base station regarding a configuration of a full duplex mode timer.
According to another aspect of the present application, there is provided a method of communicating at a user equipment in a communication system, the method comprising: sending information indicating that the user equipment has a full-duplex communication function to a base station; transmitting the measured interference strength information to the base station; and receiving scheduling of the base station for communication based on the interference strength information.
According to another aspect of the present application, there is provided a base station in a communication system, the base station being adapted to perform the method as described above.
According to another aspect of the present application, there is provided a communication system comprising a base station as described above.
Drawings
Fig. 1 is a diagram illustrating changes in frequency points and bandwidths when a base station performs channel switching for a user equipment according to an embodiment of the present disclosure;
fig. 2 is a diagram illustrating a method of scheduling full duplex communication of a user equipment by a base station according to an embodiment of the present disclosure; and
fig. 3 is a diagram illustrating a method of scheduling full duplex communication of a user equipment by a base station according to another embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical means and advantages of the present application more apparent, the inventive concepts of the present application will be further described with reference to the accompanying drawings.
Fig. 2 shows a first embodiment of the present application. The figure is merely an example and is not intended to limit the scope of the claimed invention.
As shown in fig. 2, in a first embodiment, a base station performs a scheduling procedure for full duplex communication of a user equipment by the following method steps.
In step S210, if the ue has the full duplex communication function, the base station receives information reporting the full duplex communication function from the ue after the ue accesses the wireless system. The base station can acquire the performance of the user equipment in the coverage area of the user equipment at the first time by actively reporting the capability information of the user equipment to the base station when the user equipment is accessed to a wireless system, so that the scheduling efficiency is improved.
In step S220, the base station transmits control signaling for activating the full duplex communication function to the user equipment.
After receiving the information that the user equipment has the full-duplex communication function, the base station sends a control signaling to the user equipment to inform the user equipment to activate the full-duplex communication function of the user equipment before scheduling the full-duplex communication to the user equipment, and simultaneously allocates some uplink resources to the user equipment to be used for the user equipment to initialize the self-interference module. The uplink resources may be reference signal resources dedicated to initializing a self-interference cancellation module of the user equipment, or may also be uplink transmission resources for scheduling uplink transmission of the user equipment. By allocating the resource for initializing the self-interference module to the user equipment, the user equipment can eliminate the self-interference thereof, thereby improving the communication efficiency when performing full-duplex communication.
In addition, the base station configures a full duplex mode timer for the user equipment while sending the activation signaling, and notifies the user equipment of the configuration of the timer through the control signaling. The initial value of the timer may be determined according to a duration of a full duplex communication service of the user equipment. The user equipment may maintain the full duplex mode of operation until the duration of the timer expires.
In step S230, the base station schedules full duplex transmission for the user equipment after the user equipment completes initialization of its self-interference module.
The user equipment initializes the self-interference cancellation module by using uplink resources allocated by the base station after receiving signaling for activating the full-duplex communication function sent from the base station, for example, the user equipment may initialize coefficients of the self-interference cancellation module. Further, the user equipment starts a timer according to the configuration of the full duplex mode timer notified by the base station.
It should be noted that the user equipment can perform full duplex transmission only after a period of time T after the user equipment receives signaling for controlling its activation of the full duplex communication function, which is transmitted from the base station. Wherein T is the time required for the user equipment to initialize the self-interference cancellation module, and the value is configured by the system. For example, T may be equal to 1ms, 5ms, 10ms, or 20ms, etc. Within the time T when the user equipment receives the signaling, because the initialization of the self-interference elimination module by the user equipment is not completed, the base station can only schedule half-duplex transmission for the user equipment; after time T until the full duplex timer expires, the ue has completed initializing the self-interference cancellation module, and the base station may schedule full duplex transmission for the ue.
Further, before the full-duplex timer expires, in order to ensure that the self-interference cancellation module of the ue can continuously track the change of the self-interference channel, the base station needs to allocate uplink resources for updating the coefficients of the self-interference cancellation module to the ue. The allocation of the uplink resource may be performed periodically, for example, the time interval between two adjacent allocated resources may be smaller than the correlation time of the self-interference channel; the allocation of the uplink resource may also be driven by an event, for example, if the ue detects that the residual self-interference strength is higher than a certain threshold, a resource request is sent to the base station, and the base station receives the resource request of the ue and allocates a certain uplink resource to the ue. By allocating the resource for updating the self-interference module to the user equipment in the process of full-duplex communication, the user equipment can eliminate the self-interference in the communication process, so that the communication efficiency when the full-duplex communication is executed is improved.
In addition, the base station may notify the user through control signaling to restart or close the timer before the full duplex timer expires. After receiving a command for restarting the timer, the user can restart the timer or close the timer according to the command.
After the full duplex timer is closed, the base station can only schedule half duplex transmission to the user equipment. If the ue needs to restart the full duplex transmission function, the base station may perform the above method steps again based on the stored information about the ue, and configure the ue to perform full duplex transmission again.
Fig. 3 shows a second embodiment of the present application. The figure is merely an example and is not intended to limit the scope of the claimed invention.
In the application scenario of the second embodiment, the system has a wider bandwidth, and the user equipment with full-duplex communication function can only communicate on a smaller channel bandwidth, and the base station schedules the user equipment to cause the communication channel of the user equipment to be switched. When performing channel switching, different signaling designs are required depending on the operating mode (full duplex mode or half duplex mode) in which the user equipment is located. If the ue is currently in the half-duplex operating mode, when the base station switches the ue to a new channel, the workflow of the first embodiment as shown in fig. 2 is adopted to schedule full-duplex transmission to the user; if the ue is currently in the full duplex mode, the following work flows may be respectively adopted according to different situations before and after channel switching from the interference channel:
scheme 1: if the self-interference channel is not changed basically compared with the channel before the switching after the channel switching, the user equipment still has better self-interference elimination capability on a new channel after the switching, at this time, the base station can schedule full-duplex transmission on the new channel for the user equipment, and the user equipment uses the same full-duplex timer as the channel before the switching or can start a new full-duplex timer;
and (2) a flow scheme: if the self-interference channel changes to a certain extent after channel switching compared with the self-interference channel before switching, the self-interference cancellation capability of the user equipment is reduced to a certain extent, and at this time, the base station allocates a plurality of uplink resources to the user equipment so that the user equipment updates its self-interference cancellation module while scheduling the user equipment to switch channels, so that the self-interference degree of the user equipment is maintained at a lower level. Wherein the amount of the allocated uplink resources is less than the resources required for the user equipment to initialize the self-interference cancellation module, and the user equipment can use the same full-duplex timer as the channel before the handover or start a new full-duplex timer. During the process, the user equipment updates the self-interference elimination module of the user equipment by using the allocated uplink resources, and then maintains the full-duplex working mode;
and (3) a flow path: if there is a large change in the self-interference channel after the channel switching compared to the channel before the switching, the self-interference cancellation capability of the user equipment is not enough to reduce the self-interference to a sufficiently low level after the switching, at this time, the base station first performs half-duplex transmission scheduling on the user equipment, and when the full-duplex communication function is turned on the channel after the switching, the full-duplex communication is scheduled on the user equipment by using the method steps of the first embodiment as shown in fig. 2, and the user equipment turns off the full-duplex timer of the channel before the switching.
As can be seen from the above description, the scheduling manner of the user equipment by the base station depends on the degree of variation of the self-interference channel of the user equipment.
The base station may adopt the following method to determine the degree of change of the self-interference channel:
1) if the frequency points of the channel before switching and the channel after switching are different and the bandwidth is the same, but the distance between the two frequency points is less than the first frequency point threshold value delta f1Or the frequency points of the channel before switching and the channel after switching are the same and the bandwidths are different, but the difference between the bandwidths of the two channels is smaller than the first bandwidth threshold delta B1If so, the base station considers that the user equipment still works in the full duplex mode after switching the channel, and processes according to the flow 1;
2) if the frequency points of the channel before switching and the channel after switching are different and the bandwidth is the same, but the distance between the two frequency points is larger than the first frequency point threshold value delta f1But less than the second bin threshold deltaf2Or the original channel and the switching channel have the same frequency point and different bandwidths, but the difference between the bandwidths of the two channels is larger than the first bandwidth threshold delta B1But less than a second bandwidth threshold deltab2If the user needs a certain uplink resource, the base station determines that the user needs a certain uplink resource to update the coefficient of the self-interference cancellation module, and processes the user according to the process 2;
3) if the frequency points of the channel before switching and the channel after switching are different and the bandwidth is the same, but the distance between the two frequency points is larger than the second frequency point threshold value delta f2Or the frequency point of the channel before switching is the same as that of the channel after switching, the bandwidths of the channels are different, and the difference between the bandwidths of the two channels is larger than the second bandwidth threshold delta B2Then, the base station considers that the user still operates in the full duplex mode after switching the channel, and processes according to the above-mentioned flow 3.
In the above method for determining the degree of change of the self-interference channel, the threshold Δ f1、Δf2、ΔB1And Δ B2Is a threshold value that the system sets based on actual measurements.
The base station may default to any of the above-described schemes 1 to 3 without determining the change of the self-interference channel.
In the first and second embodiments described above, the base station configures the full duplex communication function of the user equipment through signaling. In contrast, in the third embodiment, the ue reports its own operating mode according to the residual self-interference strength information measured by itself.
First, after accessing a wireless communication system, a user equipment reports its function of supporting full duplex communication to a base station. In this embodiment, the base station does not allocate additional uplink resources to the ue for initializing the self-interference cancellation module of the ue. Alternatively, the ue self-initializes its self-interference cancellation module during transmission by using the previously allocated uplink resource. The working mode is reported by the user equipment and the base station does not need to additionally allocate uplink resources of a self-interference elimination module for initializing the user equipment, so that the working load of the base station is reduced and the utilization efficiency of the resources is improved.
In the measurement, the ue measures the residual self-interference strength by using the uplink resource sent by the ue, and measures the interference strength between the ue and other ues by using the uplink resources sent by other ues. The specific method for measuring the interference intensity can be referred to the relevant description in the patents "an interference measuring method and procedure, zhangmao, etc." and "an information transmission method and system, chen, etc.
As with the method described in the above patent, the base station maintains a table describing the user pairing situation, as shown in table 1 below.
TABLE 1 user pairing situation Table
In table 1, the value (i, j) of the element in the ith row and the jth column indicates the pairing situation between the user equipment i and the user equipment j, for example, if the value is 1, it indicates that the uplink transmission of the user equipment i and the downlink transmission of the user equipment j are scheduled at the same time and in the same frequency; if the value is 0, this indicates that this procedure may not be performed; if the value is "-", it indicates that there is no measurement currently. In addition, a value (i, i) of an ith row and an ith column indicates whether the user equipment i can perform full duplex communication, and if the value is 1, it indicates ok; if the value is 0, it means not; when the value is "-", it means that there is no measurement result at present.
The user equipment measures the measured residual self-interference intensity or the interference intensity between the user equipment and a threshold value I of the interference intensity preset by the systemthComparing if the residual self-interference strength or the interference strength between the user equipments is less than the threshold IthAnd feeding back 1 to the base station, otherwise feeding back 0.
And after receiving the feedback from the user equipment, the base station updates the pairing condition table of the user equipment according to the feedback, and schedules the user equipment according to the updated pairing condition table. For example, when scheduling the user equipment i, if the value (i, i) in the pairing situation table is 1, indicating that the user equipment i can perform full-duplex communication, the base station may schedule the full-duplex communication for the user equipment i; otherwise the base station cannot schedule full duplex communication for user equipment i.
In order to enable the base station to perform scheduling more accurately, the base station may maintain a user interference strength information table, which is specifically shown in table 2 below.
TABLE 2 user interference Strength information Table
In table 2, the value (i, j) of the element of the ith row and jth column indicates the interference strength between the user equipment i and the user equipment j, and the value (i, i) of the ith row and ith column represents the residual self-interference strength of the user equipment i. The method for sending the result of the measurement to the base station by the ue may refer to the methods in the patents "an interference measurement method and procedure, zhang tong, etc." and "an information transmission method and system, chen shi, etc.
In addition, in the third embodiment, the ue may quantize the measured interference strength and residual self-interference strength between ues with corresponding levels. For example, an 8-bit field may be used to quantize the interference strength between user equipments, and a 1-bit field may be used to quantize the self-interference strength. If the residual self-interference strength of the user equipment is quantized by adopting a 1-bit field, feeding back 0 when the residual self-interference strength is greater than a preset threshold value, and otherwise feeding back 1. Similarly, for the interference strength between the user equipments quantized with 8-bit field, the interference strength is divided into 256 levels, so a total of 255 thresholds are preset; the measured interference intensity is compared with the preset threshold values, the interval where the interference intensity is located is judged, and the corresponding 8-bit field is returned to represent the interval. At this time, in the interference strength information table between the user equipments maintained at the base station, the quantization level on the diagonal line (representing the residual self-interference strength of the user equipments) is smaller than the quantization level on the off-diagonal line (representing the interference strength between the user equipments). Of course, the above-described manner is only an example, the user equipment may also use bit fields with other lengths to quantize the measured interference strength and residual self-interference strength between the user equipments, and the interference strength and residual self-interference strength between the user equipments may also use the same quantization level, that is, use bit fields with the same length to quantize.
Through the above interference strength information table, when the base station performs scheduled full duplex communication on the user equipment, if transmission of a certain user equipment in one direction (uplink or downlink direction) is selected, when a user equipment in the other direction (downlink or uplink direction) is selected, according to the result of querying the interference strength information table, if the same user equipment meets the scheduling requirement (has a service in the other direction, and the user equipment supports full duplex communication), the base station may preferentially select the user equipment.
By the method in the third embodiment, the user equipment with full duplex communication function updates the coefficients of its self-interference cancellation module when performing uplink transmission, and whether the user equipment adopts the full duplex communication mode depends on the scheduling of the base station. If the base station distributes uplink and downlink resources to the user equipment simultaneously and at the same frequency based on the user pairing condition table or the user interference intensity information table, the user equipment executes full duplex communication; otherwise it will perform half duplex communication. In the third embodiment, there is no need to involve additional activation signaling or set a timer, thereby reducing the workload of the base station and improving the efficiency of scheduling.
Similar to the second embodiment, if the system bandwidth is large and the bandwidth supported by the user equipment is smaller than the system bandwidth, the base station may perform channel switching on the user equipment according to the load condition or the channel state. The result of the interference strength or residual self-interference strength between the user equipments measured on the channel before handover may or may not be applicable on the channel after handover due to the difference between the channels before and after handover. If the channel is still applicable, the base station schedules the full-duplex communication of the user equipment based on a user pairing condition table or a user interference intensity information table on the channel before switching; if the measurement result is not applicable any more, the user equipment needs to measure the interference strength and the residual self-interference strength between the user equipment on the switched channel again and report the measurement result to the base station, the base station updates the user pairing condition table or the user interference strength information table based on the measurement result, and schedules the full-duplex communication of the user equipment based on the updated result.
When determining whether the result measured on the channel before the handover is suitable for the channel after the handover, the method of determining based on the difference of the channels, for example, by using the threshold of the frequency point or the bandwidth in the second embodiment, may be adopted. Another method is that the base station may adopt one of the methods by default, for example, if the user equipment performs channel switching, when the base station schedules full duplex communication for the user equipment on a channel after the switching, the user equipment needs to re-measure on the channel after the switching and report a measurement result to the base station, and the base station schedules the user equipment based on the measurement result; or, on the channel after the handover, the base station still uses the user pairing situation table or the user interference strength information table on the channel before the handover, but updates the measurement result when the full duplex communication is scheduled for the user equipment.
Those skilled in the art will appreciate that the present invention includes apparatus directed to performing one or more of the operations described in the present application. These devices may be specially designed and manufactured for the required purposes, or they may comprise known devices in general-purpose computers. These devices have stored therein computer programs that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., computer) readable medium, including, but not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magnetic-optical disks, ROMs (Read-Only memories), RAMs (Random Access memories), EPROMs (Erasable Programmable Read-Only memories), EEPROMs (Electrically Erasable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards, or any type of media suitable for storing electronic instructions, and each coupled to a bus. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).
It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions may be implemented by a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the features specified in the block or blocks of the block diagrams and/or flowchart illustrations of the present disclosure.
Those of skill in the art will appreciate that various operations, methods, steps in the processes, acts, or solutions discussed in the present application may be alternated, modified, combined, or deleted. Further, various operations, methods, steps in the flows, which have been discussed in the present application, may be interchanged, modified, rearranged, decomposed, combined, or eliminated. Further, steps, measures, schemes in the various operations, methods, procedures disclosed in the prior art and the present invention can also be alternated, changed, rearranged, decomposed, combined, or deleted.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (20)
1. A method of activating full duplex communication of a user equipment by a base station in a communication system, the method comprising:
receiving information indicating that it has a full duplex communication function from a user equipment;
sending a control signaling informing the user equipment of activating the full duplex communication function to the user equipment; and
after the user equipment completes initialization of the self-interference module, full duplex transmission is scheduled for the user equipment,
the base station also configures a full duplex mode timer and informs the user equipment of the configuration of the full duplex mode timer.
2. The method of claim 1, wherein uplink resources are allocated to the user equipment that cause it to perform initialization for a self-interference module.
3. The method according to claim 1 or 2,
and scheduling half-duplex transmission for the user equipment within T time for sending the control signaling, wherein T depends on time required by the user equipment to initialize a self-interference module.
4. The method of claim 3, wherein the base station schedules full duplex transmission to the user equipment after T time for the base station to transmit the control signaling before the full duplex mode timer expires.
5. The method of claim 4, further comprising:
and the base station allocates uplink resources to the user equipment to update the coefficients of the self-interference elimination module of the user equipment.
6. The method of claim 1 or 2, wherein a base station switches channels to the user equipment while maintaining full duplex communication for the user equipment.
7. The method of claim 1 or 2, wherein a base station allocates a number of uplink resources to the user equipment to perform initialization of a self-interference cancellation module while switching channels for the user equipment.
8. The method of claim 1 or 2, wherein a base station schedules half-duplex transmission for the user equipment after switching channels for the user equipment, and reactivates a full-duplex communication function of the user equipment and schedules full-duplex transmission for the user equipment.
9. The method of claim 6 or 7, wherein a base station informs the user equipment to use the same full duplex timer as before handover or to start a new full duplex timer.
10. The method of claim 6, wherein:
before and after the user equipment switches channels, the distance between two frequency points is less than a first frequency point threshold value delta f1And have the same channel bandwidth, or have the same frequency point and the difference between the two channel bandwidths is less than the first bandwidth threshold delta B1。
11. The method of claim 7, wherein:
before and after the user equipment switches channels, the distance between two frequency points is greater than a first frequency point threshold value delta f1But less than the second bin threshold deltaf2And have the same channel bandwidth, or have the same frequency point and the difference between the two channel bandwidths is greater than the first bandwidth threshold delta B1But less than a second bandwidth threshold deltab2。
12. The method of claim 8, wherein:
before and after the user equipment switches channels, the distance between two frequency points is greater than a second frequency point threshold value delta f2And has the same channel bandwidth, or has the same frequency point and the difference between the two channel bandwidths is larger than a second bandwidth threshold delta B2。
13. The method of claim 1, wherein:
and the user equipment initializes the self-interference elimination module by utilizing the uplink resources allocated before.
14. The method of claim 13, wherein:
the base station receives information about the interference intensity between the user equipment measured by the user equipment and the residual self-interference intensity of the user equipment from the user equipment, and updates a user pairing situation table and a user interference intensity information table based on the information; and
and the base station schedules the transmission of the users based on the user pairing condition table or the user interference intensity information table.
15. The method of claim 13, wherein the interference strength between the user equipments and the residual self-interference strength of the user equipments are quantized with corresponding levels in the user interference strength information table.
16. The method of claim 13, wherein:
and the base station switches the channels of the user equipment and determines whether to update the user pairing condition table and the user interference intensity information table based on the difference between the channels before and after switching.
17. A method of activating full duplex communication at a user equipment in a communication system, the method comprising:
sending information indicating that the user equipment has a full-duplex communication function to a base station;
receiving control signaling from the base station informing the user equipment of activating a full duplex communication function; and
receiving a schedule of the base station for full duplex transmission after initialization of a self-interference module is completed;
wherein the user equipment further receives a notification from the base station regarding a configuration of a full duplex mode timer.
18. A method of communicating at a user equipment in a communication system, the method comprising:
sending information indicating that the user equipment has a full-duplex communication function to a base station;
transmitting the measured interference strength information to the base station; and
receiving scheduling of the base station for communication based on the interference strength information.
19. A base station in a communication system, the base station being adapted to perform the method of any of claims 1-17.
20. A communication system comprising a base station as claimed in claim 19.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910629952.2A CN112217587A (en) | 2019-07-12 | 2019-07-12 | Channel switching method, base station, user equipment and system |
| EP20790608.2A EP3931989A4 (en) | 2019-04-18 | 2020-04-20 | Method and apparatus for measuring interference, feeding back demodulation related information and scheduling terminals, channel switching, and interference processing |
| US17/604,234 US20220216976A1 (en) | 2019-04-18 | 2020-04-20 | Method and apparatus for measuring interference, feeding back demodulation related information and scheduling terminals, channel switching, and interference processing |
| PCT/KR2020/005220 WO2020214007A1 (en) | 2019-04-18 | 2020-04-20 | Method and apparatus for measuring interference, feeding back demodulation related information and scheduling terminals, channel switching, and interference processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910629952.2A CN112217587A (en) | 2019-07-12 | 2019-07-12 | Channel switching method, base station, user equipment and system |
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| CN112217587A true CN112217587A (en) | 2021-01-12 |
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| CN201910629952.2A Pending CN112217587A (en) | 2019-04-18 | 2019-07-12 | Channel switching method, base station, user equipment and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011106A1 (en) * | 2021-08-05 | 2023-02-09 | 华为技术有限公司 | Communication method and apparatus |
| CN116112933A (en) * | 2023-04-12 | 2023-05-12 | 荣耀终端有限公司 | Communication method and electronic equipment |
-
2019
- 2019-07-12 CN CN201910629952.2A patent/CN112217587A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011106A1 (en) * | 2021-08-05 | 2023-02-09 | 华为技术有限公司 | Communication method and apparatus |
| CN116112933A (en) * | 2023-04-12 | 2023-05-12 | 荣耀终端有限公司 | Communication method and electronic equipment |
| CN116112933B (en) * | 2023-04-12 | 2023-08-29 | 荣耀终端有限公司 | Communication method and electronic equipment |
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