CN111615206A - Method and system for solving conflict between downlink control channel and synchronous signal block in NR - Google Patents
Method and system for solving conflict between downlink control channel and synchronous signal block in NR Download PDFInfo
- Publication number
- CN111615206A CN111615206A CN202010295385.4A CN202010295385A CN111615206A CN 111615206 A CN111615206 A CN 111615206A CN 202010295385 A CN202010295385 A CN 202010295385A CN 111615206 A CN111615206 A CN 111615206A
- Authority
- CN
- China
- Prior art keywords
- resource set
- terminal
- occupied
- control resource
- signal block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1221—Wireless traffic scheduling based on age of data to be sent
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and a system for solving conflict between a downlink control channel and a synchronous signal block in NR, belonging to the technical field of mobile communication and comprising the steps of accessing a plurality of terminals into a 5G base station; configuring an initial control resource set for each terminal; judging whether the control resource set needs to be reconfigured; when the resources occupied by the control resource set and the frequency bands occupied by the synchronous signal blocks do not have an overlapping area, the control resource set does not need to be reconfigured; when the frequency band overlapping area occupied by the resource set of the terminal and the synchronous signal block is larger than a first overlapping threshold value, the resource set of the terminal needs to be reconfigured; and in the process of reconfiguring the control resource set, carrying out optimization processing on the control resource set which cannot be reconfigured by scheduling the physical downlink control channel. The invention can effectively reduce the probability of resource conflict by reconfiguring the control resource set.
Description
Technical Field
The present invention relates to the field of mobile communication technologies, and in particular, to a method and a system for solving a collision between a downlink control channel and a synchronization signal block in NR.
Background
With the commercial use of fourth Generation mobile communication technology and the continuous increase of mobile services, research work on fifth Generation mobile communication technology (5th-Generation, 5G) has been started worldwide. 5G is a multi-technology converged communication, and meets the requirements of wide data and connection services through technology alternation and innovation. In RAN #71 conference, the third Generation Partnership Project (3rd Generation Partnership Project, 3GPP) has established a Study Item (SI) on 5G new air interface study, and 3GPP mainly studies 5G new air interface (NR) technology from three aspects of enhanced wireless broadband (eMBB), low-latency high-reliability communications (URLLC) and large-scale machine type communications (mtc) according to the division of vertical traffic by 5G.
At present, a research on the standards of the eMBB scenario has been basically completed, wherein, compared to LTE (Long term evolution), on the one hand, a concept of a synchronization signal block (SS block) is introduced into NR, a primary synchronization signal and a secondary synchronization signal are bundled together for transmission, and a transmission pattern of the synchronization signal block under different frequency bands is defined. On the other hand, 5G supports a larger carrier bandwidth, and in order to reduce the amount of PDCCH (Physical Downlink Control Channel) blind detection processing of the terminal, the 5G NR redefines the structure of the PDCCH, defines a Control Resource Set (CORESET), and defines that the terminal only needs to blind detect the PDCCH in the Control Resource Set configured in a higher layer.
According to the latest protocol definition, in the scheduling based on the time slot, the control resource set can occupy the first 1-3 OFDM (orthogonal Frequency Division multiplexing) symbols of each time slot, and the synchronization signal block can occupy the third OFDM symbol under some configurations, so that the situation that the physical downlink control channel of the user collides with the synchronization signal block can occur in an actual system.
Based on the above, there is a preliminary discussion in RAN #71 conference, and it is proposed to rate-match the physical downlink control channel, for the physical downlink control channel which conflicts with the synchronous signal block, the method of the downlink control channel is adopted, that is, the data at the corresponding position is punctured, and the terminal adopts the same processing mode, in many cases, it can be allowed to still transmit control information when part of the resources of the physical downlink control channel collide with the synchronization signal block, but puncturing may promote decoding errors of the control resources by the terminal, in a low-delay and high-reliability communication scenario, decoding errors of a terminal on control resources can greatly affect transmission reliability, if the method of reducing the code rate is adopted to avoid the problems, the physical downlink control channel resource overhead is increased, therefore, rate matching will reduce the receiving performance of the terminal, and a more complete solution is needed to be considered.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for solving the collision between a downlink control channel and a synchronization signal block in NR, wherein the probability of resource collision can be effectively reduced by reconfiguring a control resource set.
The invention provides a method for solving conflict between a downlink control channel and a synchronous signal block in NR, which comprises the following steps:
a plurality of terminals are accessed to a 5G base station;
configuring an initial control resource set for each terminal through a high-level signaling, wherein the control resource set comprises a plurality of parameters;
judging whether the control resource set reconfiguration needs to be carried out on the terminal or not based on the resources occupied by the initial control resource set and the frequency domain position occupied by the synchronous signal block;
when the resources occupied by the control resource set of the terminal and the frequency band occupied by the synchronous signal block have no overlapping region; or when the frequency band overlapping area occupied by the resource occupied by the control resource set of the terminal and the synchronous signal block is smaller than the first overlapping threshold, the control resource set of the terminal does not need to be reconfigured;
when the frequency band overlapping area occupied by the resource set of the terminal and the synchronous signal block is larger than a first overlapping threshold value, the resource set of the terminal needs to be reconfigured, and the next step is executed;
in the process of reconfiguring the control resource set of the terminal, when the frequency band overlapping area occupied by the user BWP and the synchronous signal block is greater than a second overlapping threshold value, judging the control resource set which cannot be reconfigured, and performing optimization processing on the control resource set which cannot be reconfigured by scheduling a physical downlink control channel; and when the frequency band overlapping area occupied by the user BWP and the synchronous signal block is less than a second threshold value, judging the control resource set to be reconfigurable, and continuously reconfiguring the control resource set of the terminal.
Optionally, the parameter of the control resource set includes a time domain symbol length occupied by the control resource set, a frequency domain bitmap, and an interleaving parameter.
Optionally, the second overlap threshold is 30%.
Optionally, the resources occupied by the initial control resource set and the frequency domain positions occupied by the synchronization signal blocks are both obtained by the base station.
Optionally, before performing optimization processing on a physical downlink control channel scheduling on a control resource set that cannot be reconfigured, the method includes:
when the control resource set of the terminal is reconfigured, if the resource occupied by the control resource set is less than the requirement of the preset CCE aggregation level, the base station gives up reconfiguring the terminal;
when the control resource set of the terminal is reconfigured, if the resource occupied by the control resource set is greater than the requirement of the preset CCE aggregation level, the base station reconfigures the terminal;
the CCE is a basic unit of resource allocation of the physical downlink control channel.
Optionally, for a control resource set that cannot be reconfigured, performing optimization processing on the physical downlink control channel scheduling, specifically:
when the resources occupied by the control resource assembly meet the requirements of CCE aggregation levels, the terminal performs blind detection on the physical downlink control channels under different CCE aggregation levels and simultaneously performs resource overlapping judgment;
if the CCE occupied by the corresponding physical downlink control channel candidate is overlapped with the frequency band occupied by the synchronous signal block, the terminal does not receive the corresponding physical downlink control channel candidate;
and if the CCE occupied by the corresponding physical downlink control channel candidate is not overlapped with the frequency band occupied by the synchronous signal block, the terminal receives the corresponding physical downlink control channel candidate.
Optionally, CCE aggregation levels include, but are not limited to, 1, 2, 4, 8, and 16.
Optionally, the control resource set indicates the number of symbols occupied by the physical downlink control channel.
The present invention also provides a system for resolving a collision between a downlink control channel and a synchronization signal block in NR, the system comprising:
the access module is used for accessing a plurality of terminals into the 5G base station;
an initial configuration module, configured to configure an initial control resource set for each terminal through a high-level signaling, where the control resource set includes a plurality of parameters;
the judging module is used for judging whether the control resource set reconfiguration needs to be carried out on the terminal or not based on the resources occupied by the initial control resource set and the frequency domain position occupied by the synchronous signal block;
the selection module I is used for controlling the frequency band occupied by the resource set and the synchronous signal block to have no overlapping area when the resource occupied by the resource set of the terminal and the frequency band occupied by the synchronous signal block have no overlapping area; or when the frequency band overlapping area occupied by the resource occupied by the control resource set of the terminal and the synchronous signal block is smaller than the first overlapping threshold, the control resource set of the terminal does not need to be reconfigured;
a second selecting module, configured to reconfigure the control resource set of the terminal when a frequency band overlapping area occupied by the resource occupied by the control resource set of the terminal and the synchronization signal block is greater than a first overlapping threshold, and execute the next step;
a third selecting module, configured to determine, in a process of reconfiguring a control resource set of a terminal, a control resource set that cannot be reconfigured when a frequency band overlapping area occupied by a user BWP and a synchronization signal block is greater than a second overlapping threshold, and perform optimization processing on the control resource set that cannot be reconfigured by a base station by scheduling a physical downlink control channel; and when the frequency band overlapping area occupied by the user BWP and the synchronous signal block is larger than a second threshold value, judging the control resource set to be reconfigurable, and continuously reconfiguring the control resource set of the terminal.
Compared with the prior art, the method and the system for solving the conflict between the downlink control channel and the synchronous signal block in the NR provided by the invention at least realize the following beneficial effects:
1. according to the method and the system for solving the conflict between the downlink control channel and the synchronous signal block in NR, an initial control resource set is configured for each terminal, and when the resource occupied by the control resource set conflicts with the frequency domain occupied by the synchronous signal block, the probability of resource conflict can be effectively reduced by reconfiguring the control resource set;
2. according to the method and the system for solving the conflict between the downlink control channel and the synchronous signal block in NR provided by the invention, when the control resource set of the terminal is reconfigured, the terminal does not receive the corresponding physical downlink control channel candidate through the scheduling response mechanism of the base station in the face of the control resource set which cannot be reconfigured, and the influence of the conflict on the physical downlink control channel can be effectively reduced.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 illustrates a transmission pattern of a synchronization signal block provided in an embodiment of the present application;
fig. 2 shows another transmission pattern of a synchronization signal block provided in an embodiment of the present application;
fig. 3 is a flowchart illustrating a method for resolving collision between a downlink control channel and a synchronization signal block in NR according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a resource configuration provided by an embodiment of the present application;
fig. 5 shows a schematic diagram of avoiding a physical downlink control channel according to an embodiment of the present application;
fig. 6 is a flowchart illustrating another method for resolving collision between a downlink control channel and a synchronization signal block in NR according to an embodiment of the present application;
FIG. 7 is a schematic diagram illustrating an initial resource configuration of a user 1 provided in an embodiment of the present application;
FIG. 8 is a schematic diagram of another resource allocation provided by an embodiment of the present application;
fig. 9 is a flowchart illustrating another method for resolving collision between a downlink control channel and a synchronization signal block in NR according to an embodiment of the present application;
fig. 10 is a schematic structural diagram illustrating a system for resolving collision between a downlink control channel and a synchronization signal block in NR according to an embodiment of the present application.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The method and the system for solving the conflict between the downlink control channel and the synchronous signal block in NR provided by the invention are applied to 5GNR, under the URLLC scene, a terminal introduces the synchronous signal block 1 into NR under the condition that a corresponding control resource set is configured in BWP by a user, the synchronous signal block 1 in NR consists of a time domain and a frequency domain, the time domain position and the frequency domain position of the synchronous signal block 1 are not fixed any more, and the synchronous signal block 1 is not fixed in the middle of a frequency band on the frequency domain; in the time domain, the positions and the number of the transmissions of the synchronization signal block 1 may vary, the synchronization signal block 1 binds the primary and secondary synchronization signals with the broadcast channel for transmission, and defines the transmission patterns of the synchronization signal block 1 under different frequency bands, such as two patterns of transmission at 30KHz subcarrier intervals below 6GHz as shown in fig. 1 and fig. 2.
The following detailed description is to be read in connection with the drawings and the detailed description.
Example one
Fig. 3 is a flowchart of a method for resolving a collision between a downlink control channel and a synchronization signal block in an NR according to an embodiment of the present invention, and as shown in fig. 3, the method for resolving a collision between a downlink control channel and a synchronization signal block in an NR according to the present invention includes:
step S101, a plurality of terminals are accessed into a 5G base station.
Step S102, configuring an initial control resource set for each terminal through high-level signaling, wherein the control resource set comprises a plurality of parameters.
Step S103, fig. 4 is a schematic resource allocation diagram provided in the embodiment of the present application, and as shown in fig. 4, the CORESET0, CORESET1, CORESET2 of the resource set and the synchronization signal block 1 occupy the position relationship of the resource. And judging whether the reconfiguration of the control resource set is needed to be carried out on the terminal or not based on the resources occupied by the initial control resource set and the frequency domain position occupied by the synchronous signal block.
Step S104, when the resource occupied by the control resource set of the terminal and the frequency band occupied by the synchronous signal block have no overlapping area; or when the frequency band overlapping area occupied by the resource set of the terminal and the synchronous signal block is smaller than the first overlapping threshold, the resource set of the terminal does not need to be reconfigured.
Step S105, fig. 5 is a schematic diagram of avoiding physical downlink control channel provided in the embodiment of the present application, and as shown in fig. 5, a PDCCH0 and a PDCCH1 of the physical downlink control channel collide with a resource occupied by a synchronization signal block 1, that is, conflict areas 8. When the frequency band overlapping area occupied by the resource set of the terminal and the synchronization signal block is greater than the first overlapping threshold, the resource set of the terminal needs to be reconfigured, and step S106 is executed.
Step S106, in the process of reconfiguring the control resource set of the terminal, when the frequency band overlapping area occupied by the user BWP and the synchronous signal block is greater than a second overlapping threshold, the control resource set which cannot be reconfigured is judged, and the base station performs optimization processing on the control resource set which cannot be reconfigured by scheduling the physical downlink control channel; and when the frequency band overlapping area occupied by the user BWP and the synchronous signal block is less than a second threshold value, judging the control resource set to be reconfigurable, and continuously reconfiguring the control resource set of the terminal.
Specifically, in the NR system, because the bandwidth of the system is large, if the physical downlink control channel occupies the entire bandwidth, not only resources are wasted, but also the blind detection complexity is large, in addition, in order to increase the flexibility of the system, the initial position of the physical downlink control channel in the time domain is also configurable, that is, in the NR system, the UE needs to know the position of the physical downlink control channel in the frequency domain and the position in the time domain to successfully decode the physical downlink control channel, so a control resource set is introduced, and for convenience, the NR system encapsulates information such as the number of OFDM symbols occupied by the physical downlink control channel in the frequency domain and the time domain in the control resource set; and encapsulating information such as the initial OFDM symbol number of the physical downlink control channel, the monitoring period of the physical downlink control channel and the like in the Search Space.
It should be noted that, an initial control resource set is configured for each terminal, where one control resource set includes a plurality of search spaces (search spaces), and the search spaces have a plurality of candidate positions that can be used for transmitting a physical downlink control channel. The duration of the current set of support control resources may be 1, 2 or 3 time-domain consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols.
The method for solving the conflict between the downlink control channel and the synchronous signal block in NR provided by the invention comprises the steps that an initial control resource set is configured for each terminal through the step S102, when the resource occupied by the control resource set conflicts with the frequency domain occupied by the synchronous signal block, the probability of resource conflict can be effectively reduced by reconfiguring the control resource set, in addition, in the face of the control resource set which cannot be reconfigured, the terminal does not receive the corresponding physical downlink control channel candidate through the scheduling response mechanism of the base station, and the influence of the conflict on the physical downlink control channel can be effectively reduced.
Optionally, the parameters of the control resource set configured in step S102 include a time domain symbol length occupied by the control resource set, a frequency domain bitmap, and an interleaving parameter.
Specifically, the parameters of the control resource set include, but are not limited to, the time domain symbol length occupied by the control resource set, the frequency domain bitmap, and the interleaving parameter, and the parameters of the control resource set related to and used in the present invention are mentioned above.
Alternatively, the second overlap threshold mentioned in the above step S106 is 30%.
Specifically, the second overlap threshold is set artificially according to the size of the frequency band overlap region occupied by the user BWP and the synchronization signal block.
It should be noted that BWP is defined as a combination of a plurality of consecutive Resource Blocks (RBs) in one carrier, that is, a carrier of one bandwidth is divided into several BWPs, each BWP contains a segment of consecutive physical Resource blocks, and a PRB can be understood as a locally numbered Resource Block, which only numbers Resource blocks in the BWP.
Optionally, the resources occupied by the initial control resource set in step S103 and the frequency domain position occupied by the synchronization signal block are both obtained by the base station.
Specifically, when the base station configures an initial control resource set, the base station determines the resources occupied by the control resource set by configuring the time domain and the frequency domain of the control resource signal, and the synchronization signal block 1 is the same as the control resource set, and also determines the resources occupied by the synchronization signal block 1 by the base station.
Optionally, before the step S106, that is, before the base station performs optimization processing on the physical downlink control channel scheduling for the control resource set that cannot be reconfigured, the method includes:
when the control resource set of the terminal is reconfigured, if the resource occupied by the control resource set is less than the requirement of the preset CCE aggregation level, the base station gives up reconfiguring the terminal;
when the control resource set of the terminal is reconfigured, if the resource occupied by the control resource set is greater than the requirement of the preset CCE aggregation level, the base station reconfigures the terminal;
the CCE is a basic unit of a physical downlink control channel.
Specifically, when the control resource set of the terminal is reconfigured, it needs to be determined whether the control resource set meets the CCE aggregation level requirement, where the CCE aggregation level requirement includes a plurality of CCE aggregation levels, and the CCE aggregation level requirement may be reconfigured as long as any CCE aggregation level requirement is met.
It should be noted that CCE (control Channel elements) is a basic constituent unit of the physical downlink control Channel, and each CCE is composed of 9 REGs.
Optionally, for the control resource set that cannot be reconfigured in step S106, the base station performs optimization processing on the physical downlink control channel scheduling, specifically:
when the resources occupied by the control resource assembly meet the requirements of CCE aggregation levels, the terminal performs blind detection on the physical downlink control channels under different CCE aggregation levels and simultaneously performs resource overlapping judgment;
if the CCE occupied by the corresponding physical downlink control channel candidate is overlapped with the frequency band occupied by the synchronous signal block, the terminal does not receive the corresponding physical downlink control channel candidate;
and if the CCE occupied by the corresponding physical downlink control channel candidate is not overlapped with the frequency band occupied by the synchronous signal block, the terminal receives the corresponding physical downlink control channel candidate.
Specifically, when the frequency domain occupied by the control resource set reaches the requirement of the CCE aggregation level, the terminal performs blind detection on the physical downlink control channels under different CCE aggregation levels, performs resource overlapping judgment at the same time, and enables the terminal not to receive corresponding physical downlink control channel candidates through a scheduling response mechanism of the base station, thereby effectively reducing the influence of collision on the physical downlink control channels.
Optionally, CCE aggregation levels include, but are not limited to, 1, 2, 4, 8, and 16.
In particular, CCE aggregation levels are agreed upon by the agreement.
Optionally, the control resource set indicates the number of symbols occupied by the physical downlink control channel.
Specifically, information such as the number of frequency bands occupied by the physical downlink control channel in the frequency domain and the number of OFDM symbols occupied by the physical downlink control channel in the time domain is encapsulated in the control resource set, and therefore the control resource set indicates the number of symbols occupied by the physical downlink control channel.
The present invention will be further described with reference to specific examples.
Example two
Fig. 6 is a flowchart of another method for resolving a collision between a downlink control channel and a synchronization signal block in NR according to an embodiment of the present application, and as shown in fig. 6, the specific method in this case includes:
step S201, fig. 7 is a schematic diagram of initial resource allocation of a user provided in this embodiment of the present application, and as shown in fig. 7, a plurality of terminals are accessed to a 5G base station, for an NR cell, a bandwidth is 100MHz, a subcarrier interval is 30KHz, a full bandwidth is 273PRB, a timeslot ratio is DDDSU, in each downlink timeslot and a special timeslot, a time domain of a physical downlink control channel 2 of a user 1 occupies the first three OFDM symbols, and a frequency domain of a synchronization signal block 1 occupies the middle 20PRB (240 subcarriers) of the full bandwidth.
Step S202, configuring an initial control resource set for each terminal through a high-level signaling, and for user 1, configuring a corresponding control resource set for user 1 in BWP by the high-level signaling, illustratively, the control resource set occupies 3 OFDM symbols in time domain, and the control resource set occupies 80 PRBs in the middle of the full bandwidth in frequency domain.
Specifically, the size of the bandwidth occupied by the frequency domain of the control resource set is determined by the base station according to the resource and the number of users.
Step S203, determining whether a control resource set reconfiguration needs to be performed on the terminal, and according to the time for configuring the initial control resource set, acquiring resources occupied by the initial resource set, that is, a time domain and a frequency domain occupied by the control resource set and a frequency domain position occupied by the synchronization signal block 1, and determining whether the frequency domain occupied by the control resource set and the resources occupied by the synchronization signal block 1 have an overlapping region.
Step S204, when the frequency band overlapping area occupied by the resource set of the terminal and the frequency band occupied by the synchronization signal block 1 is greater than the first overlapping threshold, the resource set of the terminal needs to be reconfigured.
Specifically, in a 5ms period of the synchronization signal block 1, when there is a conflict between the control resource set and the synchronization signal block 1, that is, when the number of REGs overlapping the resource occupied by the control resource set and the frequency band occupied by the synchronization signal block 1 is large, the base station needs to reconfigure the control resource set of the user 1.
The period of transmission of the synchronization signal block 1 is in the range of 5ms to 160 ms.
Step S205 determines whether the control resource set cannot be reconfigured, and if the control resource set can be reconfigured, the control resource set of the terminal is continuously reconfigured.
It should be noted that, in the NR downlink synchronization process, the UE needs to first blindly detect the synchronization signal block 1, then find the initial position of the corresponding control resource set according to the synchronization signal block 1, and then blindly detect the physical downlink control channel in the control resource set.
Specifically, fig. 8 is another schematic resource configuration diagram provided in the embodiment of the present application, as shown in fig. 8, a relationship that a physical downlink control channel 2 of a user 1 and a synchronization signal block 1 occupy resources, for a control resource set that can be reconfigured, after a terminal receives a reconfiguration instruction, the control resource set is adjusted to be configured, and a blind test is performed in the reconfigured control resource set, and a result of the configuration is that the control resource set only occupies the first two OFDM symbols, so as to avoid collision with a synchronization signal, where the blind test is to detect all possible physical downlink control channels by the terminal, and if one of the detection succeeds, it is indicated that the physical downlink control channel is detected.
EXAMPLE III
Fig. 9 is a flowchart of another method for resolving a collision between a downlink control channel and a synchronization signal block in NR according to an embodiment of the present application, where as shown in fig. 9, the specific method in this case includes:
step S301, a plurality of terminals are accessed into a 5G base station, for an NR cell, the bandwidth is 100MHz, the subcarrier interval is 30KHz, the full bandwidth is 273PRB, the time slot ratio is DDDSU, in each downlink time slot and special time slot, a physical downlink control channel occupies the first three OFDM symbols, and the frequency domain of a synchronization signal block 1 occupies the middle 20PRB (240 subcarriers) of the full bandwidth.
Step S302, configuring an initial control resource set for each terminal through a high-level signaling, configuring a corresponding control resource set for the user 2 in BWP for the high-level signaling for the user 2, wherein the control resource set occupies 3 OFDM symbols in time domain, and the control resource set occupies 30 PRBs in the middle of full bandwidth in frequency domain.
Step S303, determining whether a control resource set reconfiguration needs to be performed on the terminal, and according to the time for configuring the initial control resource set, acquiring resources occupied by the initial resource set, that is, a time domain and a frequency domain occupied by the control resource set and a frequency domain position occupied by the synchronization signal block 1, and determining whether the frequency domain occupied by the control resource set and the resources occupied by the synchronization signal block 1 have an overlapping region.
Step S304, when the frequency band overlapping area occupied by the resource set of the terminal and the frequency band occupied by the synchronization signal block 1 is greater than the first overlapping threshold, the resource set of the terminal needs to be reconfigured.
Specifically, within the 5ms period of the transmission of the synchronization signal block 1, if there is a collision between the control resource set and the synchronization signal block 1, step S305 is executed.
Step S305, when the control resource set of the terminal is reconfigured, if the resource occupied by the control resource set is less than the requirement of the preset CCE aggregation level, the base station abandons the reconfiguration of the terminal; when the control resource set of the terminal is reconfigured, if the resource occupied by the control resource set is greater than the requirement of the preset CCE aggregation level, the base station reconfigures the terminal.
Step S306, in the process of reconfiguring the control resource set of the terminal, when the frequency band overlapping area occupied by the user BWP and the synchronization signal block 1 is greater than the second overlapping threshold, it is determined as a control resource set that cannot be reconfigured, and for the control resource set that cannot be reconfigured, the terminal performs blind detection on the physical downlink control channels at different CCE aggregation levels and performs resource overlapping determination at the same time.
Specifically, when the terminal performs blind detection on the physical downlink control channels under different CCE aggregation levels, firstly the base station schedules a user 2, judges whether the CCE of the scheduled physical downlink control channel is overlapped with a synchronization signal block 1 after being interleaved, and if the CCE is overlapped, abandons scheduling; if no overlap occurs, the terminal sends time slots in the synchronizing signal block 1, performs blind detection under each aggregation level, and simultaneously performs resource conflict judgment, if CCEs occupied by physical downlink control channel candidates under certain aggregation levels conflict with the synchronizing signal block 1, the terminal does not receive corresponding physical downlink control channel candidates; and if the CCE occupied by the physical downlink control channel candidate under certain aggregation levels does not conflict with the synchronizing signal block 1, the terminal receives the corresponding physical downlink control channel candidate.
Example four
Fig. 10 is a schematic structural diagram of a system for resolving collision between a downlink control channel and a synchronization signal block in NR according to an embodiment of the present invention, and as shown in fig. 10, the present invention further provides a system for resolving collision between a downlink control channel and a synchronization signal block in NR, where the system includes:
an access module 401, configured to access a plurality of terminals to a 5G base station;
an initial configuration module 402, configured to configure an initial control resource set for each terminal through a high-level signaling, where the control resource set includes a plurality of parameters;
a determining module 403, configured to determine whether to perform control resource set reconfiguration on the terminal based on the resource occupied by the initial control resource set and the frequency domain position occupied by the synchronization signal block 1;
a first selecting module 404, configured to determine that there is no overlapping area between resources occupied by a control resource set of the terminal and a frequency band occupied by a synchronization signal block 1; or when the frequency band overlapping area occupied by the resource set of the terminal and the frequency band overlapping area occupied by the synchronous signal block 1 are smaller than the first overlapping threshold value, the resource set of the terminal does not need to be reconfigured;
a second selecting module 405, configured to reconfigure the control resource set of the terminal when a frequency band overlapping area occupied by the resource set of the terminal and the synchronization signal block 1 is greater than a first overlapping threshold;
a third selecting module 406, configured to determine, in the process of reconfiguring the control resource set of the terminal, that a control resource set that cannot be reconfigured is determined when a frequency band overlapping area occupied by the user BWP and the synchronization signal block 1 is greater than a second overlapping threshold, and perform optimization processing on the control resource set that cannot be reconfigured by scheduling a physical downlink control channel; and when the frequency band overlapping area occupied by the user BWP and the synchronous signal block 1 is larger than a second threshold, judging the control resource set to be reconfigurable, and continuously reconfiguring the control resource set of the terminal.
Specifically, a plurality of terminals are accessed to a 5G base station through an access module 401, an initial control resource set is configured for each terminal through a high-level signaling through an initial configuration module 402, a judgment module 403 judges whether the control resource set needs to be reconfigured for the terminal, if the reconfiguration is needed, the control resource set is reconfigured for the terminal, and if the reconfiguration is not needed, no measure is taken, wherein in the reconfiguration process, a control resource set which cannot be reconfigured exists, a module three 406 needs to be selected, and the terminal does not receive corresponding physical downlink control channel candidates by performing optimization processing on physical downlink control channel scheduling.
According to the system for solving the conflict between the downlink control channel and the synchronous signal block in NR provided by the invention, the initial configuration module 402 is used for configuring the initial control resource set for each terminal, when the resource occupied by the control resource set conflicts with the frequency domain occupied by the synchronous signal block, the probability of resource conflict can be effectively reduced by reconfiguring the control resource set, in addition, in the face of the control resource set which cannot be reconfigured, the terminal does not receive the corresponding physical downlink control channel candidate through the scheduling response mechanism of the base station, and the influence of the conflict on the physical downlink control channel can be effectively reduced.
Compared with the prior art, the method and the system for solving the conflict between the downlink control channel and the synchronous signal block in the NR provided by the invention at least realize the following beneficial effects:
1. according to the method and the system for solving the conflict between the downlink control channel and the synchronous signal block in NR, an initial control resource set is configured for each terminal, and when the resource occupied by the control resource set conflicts with the frequency domain occupied by the synchronous signal block, the probability of resource conflict can be effectively reduced by reconfiguring the control resource set;
2. according to the method and the system for solving the conflict between the downlink control channel and the synchronous signal block in NR provided by the invention, when the control resource set of the terminal is reconfigured, the terminal does not receive the corresponding physical downlink control channel candidate through the scheduling response mechanism of the base station in the face of the control resource set which cannot be reconfigured, and the influence of the conflict on the physical downlink control channel can be effectively reduced.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (9)
1. A method for resolving downlink control channel and synchronization signal block collision in NR, the method comprising:
a plurality of terminals are accessed to a 5G base station;
configuring an initial control resource set for each terminal through a high-level signaling, wherein the control resource set comprises a plurality of parameters;
judging whether the control resource set reconfiguration needs to be carried out on the terminal or not based on the resources occupied by the initial control resource set and the frequency domain position occupied by the synchronous signal block;
when the resources occupied by the control resource set of the terminal and the frequency band occupied by the synchronous signal block have no overlapping region; or when the frequency band overlapping area occupied by the resource occupied by the control resource set of the terminal and the synchronous signal block is smaller than the first overlapping threshold, the control resource set of the terminal does not need to be reconfigured;
when the frequency band overlapping area occupied by the resource set of the terminal and the synchronous signal block is larger than a first overlapping threshold value, the resource set of the terminal needs to be reconfigured, and the next step is executed;
in the process of reconfiguring the control resource set of the terminal, when the frequency band overlapping area occupied by the user BWP and the synchronous signal block is greater than a second overlapping threshold value, judging the control resource set which cannot be reconfigured, and performing optimization processing on the control resource set which cannot be reconfigured by scheduling a physical downlink control channel; and when the frequency band overlapping area occupied by the user BWP and the synchronous signal block is less than a second threshold value, judging the control resource set to be reconfigurable, and continuously reconfiguring the control resource set of the terminal.
2. The method of claim 1, wherein the parameters of the control resource set comprise a time domain symbol length occupied by the control resource set, a frequency domain bitmap, and interleaving parameters.
3. The method of resolving collision of downlink control channels and synchronization signal blocks in NR of claim 1, wherein the second overlap threshold is 30%.
4. The method of claim 1, wherein the resources occupied by the initial set of control resources and the frequency domain locations occupied by the synchronization signal blocks are obtained by a base station.
5. The method of claim 1, wherein before optimizing the scheduling of the physical downlink control channel for the set of control resources that cannot be reconfigured, the method for resolving the collision of the downlink control channel and the synchronization signal block in the NR comprises:
when the control resource set of the terminal is reconfigured, if the resource occupied by the control resource set is less than the requirement of the preset CCE aggregation level, the base station gives up reconfiguring the terminal;
when the control resource set of the terminal is reconfigured, if the resource occupied by the control resource set is greater than the requirement of the preset CCE aggregation level, the base station reconfigures the terminal;
wherein the CCE is a basic unit for physical downlink control channel resource allocation.
6. The method according to claim 5, wherein the control resource set that cannot be reconfigured is optimized by scheduling a physical downlink control channel, and specifically includes:
when the resources occupied by the control resource assembly meet the requirements of CCE aggregation levels, the terminal performs blind detection on the physical downlink control channels under different CCE aggregation levels and simultaneously performs resource overlapping judgment;
if the CCE occupied by the corresponding physical downlink control channel candidate is overlapped with the frequency band occupied by the synchronous signal block, the terminal does not receive the corresponding physical downlink control channel candidate;
and if the CCE occupied by the corresponding physical downlink control channel candidate is not overlapped with the frequency band occupied by the synchronous signal block, the terminal receives the corresponding physical downlink control channel candidate.
7. The method of resolving collision of downlink control channels with synchronization signal blocks in NR of claim 6, wherein the CCE aggregation levels include but are not limited to 1, 2, 4, 8 and 16.
8. The method of resolving downlink control channel and synchronization signal block collision in NR of claim 1, wherein the control resource set indicates the number of symbols occupied by a physical downlink control channel.
9. A system for resolving downlink control channel and synchronization signal block collision in NR, the system comprising:
the access module is used for accessing a plurality of terminals into the 5G base station;
an initial configuration module, configured to configure an initial control resource set for each terminal through a high-level signaling, where the control resource set includes a plurality of parameters;
the judging module is used for judging whether the control resource set reconfiguration needs to be carried out on the terminal or not based on the resources occupied by the initial control resource set and the frequency domain position occupied by the synchronous signal block;
the selection module I is used for controlling the frequency band occupied by the resource set and the synchronous signal block to have no overlapping area when the resource occupied by the resource set of the terminal and the frequency band occupied by the synchronous signal block have no overlapping area; or when the frequency band overlapping area occupied by the resource occupied by the control resource set of the terminal and the synchronous signal block is smaller than the first overlapping threshold, the control resource set of the terminal does not need to be reconfigured;
a second selecting module, configured to reconfigure the control resource set of the terminal when a frequency band overlapping area occupied by the resource occupied by the control resource set of the terminal and the synchronization signal block is greater than a first overlapping threshold, and execute the next step;
a third selecting module, configured to determine, in a process of reconfiguring a control resource set of a terminal, a control resource set that cannot be reconfigured when a frequency band overlapping area occupied by a user BWP and a synchronization signal block is greater than a second overlapping threshold, and perform optimization processing on the control resource set that cannot be reconfigured by a base station by scheduling a physical downlink control channel; and when the frequency band overlapping area occupied by the user BWP and the synchronous signal block is larger than a second threshold value, judging the control resource set to be reconfigurable, and continuously reconfiguring the control resource set of the terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010295385.4A CN111615206B (en) | 2020-04-15 | 2020-04-15 | Method and system for solving conflict between downlink control channel and synchronous signal block in NR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010295385.4A CN111615206B (en) | 2020-04-15 | 2020-04-15 | Method and system for solving conflict between downlink control channel and synchronous signal block in NR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111615206A true CN111615206A (en) | 2020-09-01 |
| CN111615206B CN111615206B (en) | 2022-06-17 |
Family
ID=72203664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010295385.4A Active CN111615206B (en) | 2020-04-15 | 2020-04-15 | Method and system for solving conflict between downlink control channel and synchronous signal block in NR |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111615206B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115835397A (en) * | 2023-02-22 | 2023-03-21 | 广东移远通信技术有限公司 | Method and apparatus for wireless communication |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196685A (en) * | 2011-05-12 | 2017-09-22 | Lg 电子株式会社 | Use the method and its transmitting end equipment of multiple antenna port transmission signals |
| WO2019098748A1 (en) * | 2017-11-16 | 2019-05-23 | 엘지전자 주식회사 | Method and device for receiving signal in wireless communication system |
| CN110034881A (en) * | 2018-01-12 | 2019-07-19 | 展讯通信（上海）有限公司 | PDCCH and the collision solution and device of synchronization signal block, storage medium, base station, user equipment |
| CN110535583A (en) * | 2018-08-10 | 2019-12-03 | 中兴通讯股份有限公司 | It transmits and determines method, apparatus, base station, terminal and computer readable storage medium |
-
2020
- 2020-04-15 CN CN202010295385.4A patent/CN111615206B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196685A (en) * | 2011-05-12 | 2017-09-22 | Lg 电子株式会社 | Use the method and its transmitting end equipment of multiple antenna port transmission signals |
| WO2019098748A1 (en) * | 2017-11-16 | 2019-05-23 | 엘지전자 주식회사 | Method and device for receiving signal in wireless communication system |
| CN110034881A (en) * | 2018-01-12 | 2019-07-19 | 展讯通信（上海）有限公司 | PDCCH and the collision solution and device of synchronization signal block, storage medium, base station, user equipment |
| CN110535583A (en) * | 2018-08-10 | 2019-12-03 | 中兴通讯股份有限公司 | It transmits and determines method, apparatus, base station, terminal and computer readable storage medium |
Non-Patent Citations (2)
| Title |
|---|
| MEDIATEK INC.: "3GPP TSG RAN WG1 Meeting #92 R1-1801645", 《3GPP》 * |
| SPREADTRUM COMMUNICATIONS: "GPP TSG RAN WG1 Meeting AH 1801 R1-1800285", 《3GPP》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115835397A (en) * | 2023-02-22 | 2023-03-21 | 广东移远通信技术有限公司 | Method and apparatus for wireless communication |
| CN115835397B (en) * | 2023-02-22 | 2023-05-16 | 广东移远通信技术有限公司 | Method and apparatus for wireless communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111615206B (en) | 2022-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3666011B1 (en) | User equipment, base station, and method for enabling reliable and low latency communication | |
| RU2582334C2 (en) | Inserting virtual carrier in conventional ofdm host carrier in communication system | |
| RU2595271C2 (en) | Virtual carrier inserting into conventional ofdm host carrier in communication system | |
| US20210014842A1 (en) | Information sending and receiving methods and devices | |
| CN105357162B (en) | Signal processing method, base station and terminal | |
| US10477557B2 (en) | Transmission of control information to reduced bandwidth terminals | |
| RU2586319C2 (en) | Telecommunication method and system | |
| CN108605327B (en) | Terminal, wireless communication method, base station and system | |
| RU2763454C1 (en) | Broadband operation in an unlicensed spectrum with multiple separate frequency bands | |
| KR102047577B1 (en) | Mobile communications system, network element and method for resource allocation on a virtual carrier for machine-type communications with a narrow band epdcch | |
| RU2595269C2 (en) | Telecommunication method and system | |
| RU2627028C2 (en) | Communication device and method | |
| JP7280405B2 (en) | Base station, transmission method and integrated circuit | |
| US20170142703A1 (en) | Ue discovery method and system in d2d network | |
| JP4910531B2 (en) | Ad hoc communication method and communication system between terminals | |
| JP2018507659A (en) | Wireless interface technology, apparatus, and method for using communication system | |
| CN106357579B (en) | Method for using frequency spectrum resource of orthogonal frequency division multiplexing system and corresponding base station | |
| CN110740516A (en) | Method and apparatus for transmitting uplink channel in unlicensed band | |
| CN111865479B (en) | Communication method and device | |
| TW202231107A (en) | Wireless communication system and operating method of base station | |
| KR102229854B1 (en) | Mobile communication base station and method for selecting a virtual carrier for machine-type communications based on measurements of channel conditions | |
| EP3777381B1 (en) | Method and apparatus for uplink preemption indication management | |
| WO2018028692A1 (en) | Methods and apparatus for cell access via anchor carrier | |
| CN114080851A (en) | Method and apparatus for transceiving data in unlicensed frequency band | |
| CN107734661B (en) | Method for scheduling terminal resources, method and equipment for determining resource scheduling granularity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |