CN111163526B - Downlink resource mapping method, device, computer equipment and storage medium - Google Patents
Downlink resource mapping method, device, computer equipment and storage medium Download PDFInfo
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- CN111163526B CN111163526B CN201911379889.8A CN201911379889A CN111163526B CN 111163526 B CN111163526 B CN 111163526B CN 201911379889 A CN201911379889 A CN 201911379889A CN 111163526 B CN111163526 B CN 111163526B
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Abstract
The application relates to a downlink resource mapping method, a device, a computer device and a storage medium, wherein downlink wireless resources of a cell are divided into a plurality of resource pools in advance, and each resource pool is responsible for resource allocation and mapping of a corresponding type of channel/signal, so that after a base station collects the channels/signals with scheduling requirements, the scheduling time sequence of each channel/signal is combined, and the resources are allocated to each channel/signal from the type of each channel/signal to the corresponding resource pool, so as to complete mapping. Therefore, the resource pool is reasonably divided, the conflict of the wireless time-frequency resource mapping positions is effectively avoided, the flexible scheduling of resources among different channels/signals is adapted, and the utilization efficiency of wireless resources is greatly improved.
Description
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a downlink resource mapping method and apparatus, a computer device, and a storage medium.
Background
Generally, after a base station establishes a cell, a physical resource mapping position of a downlink physical shared channel depends on a resource scheduling indication position, for example, in an LTE system, a downlink overall physical resource mapping pattern is substantially fixed in each scheduled downlink time slot/subframe.
In order to simplify the processing of the base station, the conventional technology generally implements resource mapping of the system based on the fixed mapping pattern. However, with the continuous increase of the demand for traffic by mobile internet, a New Radio (NR) system is in operation, and in the NR system, except that a Radio resource mapping pattern of a broadcast synchronization block may be determined when a base station establishes a cell, physical resource mapping patterns of other downlink channels are determined based on user configuration, however, the user capabilities and the demand are different, and thus, the downlink resource mapping pattern is varied, which results in that a resource mapping method based on a fixed pattern cannot meet the highly flexible resource mapping demand of the NR system.
Therefore, the NR system has a problem that the resource mapping efficiency is low.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a downlink resource mapping method, apparatus, computer device and storage medium for solving the above technical problems.
In a first aspect, an embodiment of the present application provides a downlink resource mapping method, where the method includes:
acquiring channels/signals with scheduling requirements in a cell downlink time slot and scheduling time sequences of the channels/signals; the scheduling time sequence represents the resource scheduling time of each channel/signal;
determining a resource pool corresponding to each channel/signal according to the type of each channel/signal; the resource pool is a plurality of resource pools which divide the downlink wireless resources of the cell in advance according to the basic configuration of the cell, and each resource pool is used for resource allocation and mapping of the corresponding type of channel/signal;
according to the scheduling time sequence and the scheduling requirement of each channel/signal, allocating available time-frequency resources for each channel/signal in a corresponding resource pool;
and mapping the data carried by each channel/signal on the time frequency resource of the corresponding resource pool according to the available time frequency resource allocated to each channel/signal and the scheduling time sequence of each channel/signal.
In one embodiment, the resource pool includes a first resource pool and a second resource pool; the first resource pool is used for controlling resource allocation and mapping of the class channel; the second resource pool is used for resource allocation and mapping of other types of channels than control type channels.
In one embodiment, the determining the resource pool corresponding to each channel/signal according to the type of each channel/signal includes:
if the channel/signal is a first type of channel/signal, determining the corresponding resource pool as a first resource pool; the first type of channel/signal comprises a channel/signal for transmitting control information;
if the channel/signal is a second type of channel/signal, determining the corresponding resource pool as a second resource pool; the second type of channel comprises a synchronization block SSB, a reference signal CSI-RS and a data channel PDSCH;
wherein, the first kind of channel/signal and the second kind of channel/signal are divided according to the frequency domain granularity of channel/signal scheduling or the purpose of the channel/signal.
In one embodiment, the allocating available time-frequency resources for each channel/signal in a corresponding resource pool according to the scheduling timing and the scheduling requirement of each channel/signal includes:
and acquiring the available time-frequency resources of the first type of channels/signals from the first resource pool according to the scheduling time sequence and the scheduling requirement of the first type of channels/signals, and acquiring the available time-frequency resources of the second type of channels/signals from the second resource pool according to the scheduling time sequence and the scheduling requirement of the second type of channels/signals.
In one embodiment, the obtaining available time-frequency resources of the second type of channels/signals from the second resource pool according to the scheduling timing and scheduling requirement of the second type of channels/signals includes:
according to the scheduling time sequence of the second type of channels/signals, scheduling priority ordering is carried out on target channels/signals in the second type of channels/signals; the target channel/signal is a channel/signal with a coupling relation in resource mapping;
according to the scheduling priority sequence, sequentially advancing the target channel/signal scheduling configuration by N time slots in the order of the priority from high to low to obtain the differential scheduling time sequence of the target channel/signal; n is a positive integer;
and allocating available time-frequency resources for the target channel/signal in the second resource pool according to the differential scheduling time sequence and scheduling requirements of the target channel/signal.
In one embodiment, the mapping data carried by each channel/signal onto the time-frequency resource of the corresponding resource pool according to the available time-frequency resource allocated to each channel/signal and the scheduling timing of each channel/signal includes:
generating resource mapping indication information according to the available time-frequency resources allocated to each channel/signal and the scheduling time sequence of each channel/signal; the resource mapping indication information at least comprises an empty sending time slot, time domain information, frequency domain information, a channel type and a resource pool number;
and mapping the data carried by each channel/signal on the time-frequency resource of the corresponding resource pool according to the resource mapping indication information.
In one embodiment, the resource pool includes a resource mapping identifier table; the resource mapping identification table is used for recording the resource occupation condition in the resource pool;
after mapping the data carried by each channel/signal on the time-frequency resource of the corresponding resource pool, the method further includes: and resetting the occupied zone bit record of the time-frequency resource in each time slot in the resource mapping identification table of each resource pool.
In one embodiment, the resource mapping identifier table includes a correspondence relationship between a slot number in a frame, a number of symbols included in a single slot, and subcarrier data included in a resource pool bandwidth.
In a second aspect, an embodiment of the present application provides a downlink resource mapping apparatus, where the apparatus includes:
the system comprises a demand collection module, a scheduling module and a scheduling module, wherein the demand collection module is used for acquiring channels/signals with scheduling demands in a cell downlink time slot and scheduling time sequences of the channels/signals; the scheduling time sequence represents the resource scheduling time of each channel/signal;
the scheduling and classifying module is used for determining a resource pool corresponding to each channel/signal according to the type of each channel/signal; the resource pool is a plurality of resource pools which divide the downlink wireless resources of the cell in advance according to the basic configuration of the cell, and each resource pool is used for resource allocation and mapping of the corresponding type of channel/signal;
the resource scheduling module is used for allocating available time-frequency resources for each channel/signal in the corresponding resource pool according to the scheduling time sequence and the scheduling requirement of each channel/signal;
and the resource mapping module is used for mapping the data carried by each channel/signal on the time frequency resource of the corresponding resource pool according to the available time frequency resource allocated to each channel/signal and the scheduling time sequence of each channel/signal.
In a third aspect, an embodiment of the present application provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the steps of any one of the methods provided in the embodiments of the first aspect when executing the computer program.
In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of any one of the methods provided in the embodiments of the first aspect.
According to the downlink resource mapping method, the downlink resource mapping device, the computer equipment and the storage medium provided by the embodiment of the application, downlink wireless resources of a cell are divided into a plurality of resource pools in advance, and each resource pool is responsible for resource allocation and mapping of a corresponding type of channel/signal, so that after a base station collects channels/signals with scheduling requirements, the scheduling time sequence of each channel/signal is combined, and resources are allocated to each channel/signal from the type of each channel/signal to the corresponding resource pool, so that mapping is completed. Therefore, the resource pool is reasonably divided, the conflict of the wireless time-frequency resource mapping positions is effectively avoided, the flexible scheduling of resources among different channels/signals is adapted, and the utilization efficiency of wireless resources is greatly improved.
Drawings
Fig. 1 is an application environment diagram of downlink resource mapping according to an embodiment;
fig. 1a is a schematic diagram of a radio frame structure according to an embodiment;
fig. 2 is a flowchart illustrating a downlink resource mapping method according to an embodiment;
FIG. 3 is a timing diagram illustrating a scheduling mapping according to an embodiment;
fig. 4 is a flowchart illustrating a downlink resource mapping method according to another embodiment;
fig. 5 is a flowchart illustrating a downlink resource mapping method according to another embodiment;
fig. 6 is a block diagram of a functional module inside a base station according to an embodiment;
fig. 7 is an internal structural diagram of a downlink resource scheduling management module according to an embodiment;
fig. 8 is an internal structure diagram of a downlink resource mapping module according to an embodiment;
fig. 9 is a schematic diagram illustrating a functional module executing a downlink resource mapping method according to an embodiment;
fig. 10 is a block diagram of a downlink resource pool planning according to an embodiment;
fig. 11 is a block diagram of a downlink resource mapping apparatus according to an embodiment;
FIG. 12 is an internal block diagram of a computer device provided in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The downlink resource mapping method provided by the application can be applied to an application environment shown in fig. 1, where the base station can be a base station of any standard, such as a 5G base station, a 4G base station, and the like, and the terminal is not limited to a mobile phone, a tablet computer, a smart watch, and the like, where the base station and the terminal can communicate with each other.
The embodiment of the application provides a downlink resource mapping method, a downlink resource mapping device, computer equipment and a storage medium, and aims to solve the technical problem of low resource mapping efficiency in an NR system. The following describes in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems by embodiments and with reference to the drawings. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. It should be noted that in the downlink resource mapping method provided in the present application, the execution main body of fig. 2 to fig. 5 is a base station, where the execution main body may also be a downlink resource mapping apparatus, where the apparatus may be implemented as part or all of the base station by software, hardware, or a combination of software and hardware.
Before describing the embodiments of the downlink resource mapping method, a part of basic knowledge related to the present application is described.
In a mobile communication system, a base station refers to a device for providing services for a terminal, and is responsible for scheduling and controlling radio resources of users in a wireless communication system; the base station needs to provide resource scheduling indication information of downlink (base station to terminal) and uplink (terminal to base station) for the accessed users. The resource scheduling information indication includes information such as resource position and transmission method used in data transmission, and the base station maps data information bits to corresponding time-frequency resources according to the resource scheduling information, which is called resource mapping.
The following embodiments will be explained based on an NR system using a frame structure and a resource structure based on OFDMA technology as an example. In the OFDMA Frame structure, the radio resource is divided into different levels of units in the time domain, for example, into frames (frames), slots (slots), and symbols (Symbo 1), the basic unit of time domain scheduling is an OFDM symbol, the scheduling granularity is a Slot (Slot), for example, as shown in fig. 1a, M frames are divided in time, each Frame includes N slots, and each Slot is composed of S basic OFDM) symbols.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.
In an embodiment, fig. 2 provides a downlink resource mapping method, where this embodiment relates to a specific process in which a base station allocates available time-frequency resources for channels/signals from a resource pool corresponding to each channel/signal for channels/signals with scheduling requirements in a cell downlink timeslot, and performs resource mapping, and as shown in fig. 2, the method includes:
s101, acquiring channels/signals with scheduling requirements in a cell downlink time slot and scheduling time sequences of the channels/signals; the scheduling timing indicates a resource scheduling time of each channel/signal.
Wherein, the channel/signal is a channel or a reference signal, the base station collects the scheduling requirements of each channel or reference signal in the downlink time slot, and collects the channels/signals with the scheduling requirements. Wherein the collected channels/signals are not of a type, including based on a periodic scheduling mechanism or based on an event scheduling mechanism. Exemplarily, taking the NR system as an example, the channels based on the periodic scheduling mechanism include a synchronization block (SS/PBCH block, SSB), an SSB (formed by a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSs), and a Physical Broadcast Channel (PBCH)), a Channel state information reference signal (CSI-RS), and the like, and the channels based on the event scheduling mechanism include a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Channel (PDSCH), and the like, and in a scenario in which a slot is used as a basic scheduling unit, it is necessary to collect one or more channels or reference signals in a Downlink slot.
The scheduling timing refers to a resource scheduling time of a control channel/signal, that is, which specific time slot of the radio resource each channel/signal needs to be scheduled on, and for example, the base station may allocate a time slot for each channel/signal, for example, the scheduling timing is set according to an actual priority and a requirement of each channel/signal.
S102, determining a resource pool corresponding to each channel/signal according to the type of each channel/signal; the resource pool is a plurality of resource pools which divide downlink wireless resources of the cell in advance according to the basic configuration of the cell, and each resource pool is used for resource allocation and mapping of the corresponding type of channel/signal.
And based on the channels/signals with the scheduling requirements, the base station determines a resource pool corresponding to each channel/signal.
The resource pool is a plurality of resource pools into which downlink radio resources of a cell are divided in advance according to a cell basic configuration, where the cell basic configuration represents a bandwidth, the number of UEs that can be supported by the cell, and the like, and in practice, the cell basic configuration is determined according to a cell service capability, which is not limited in this embodiment.
The divided resource pools are respectively responsible for resource allocation and mapping of different types of channels/signals, and time-frequency positions contained in the resource pools are completely independent and do not overlap. Therefore, the resource pool is divided into channels/signals corresponding to different types, and the resources of each channel/signal can be allocated and mapped in a targeted and completely independent manner, so that the utilization rate of downlink wireless resources is improved.
Specifically, in this step, since each resource pool is divided in advance according to the basic configuration of the cell, after the base station collects the channels/signals having the scheduling requirement in the cell, it is determined which resource pool each channel/signal corresponds to according to the type of each channel/signal.
And S103, distributing available time-frequency resources for each channel/signal in a corresponding resource pool according to the scheduling time sequence and the scheduling requirement of each channel/signal.
And based on the determined resource pool corresponding to each channel/signal, the base station allocates available time-frequency resources for each channel/signal in the corresponding resource pool according to the scheduling time sequence and the scheduling requirement of each channel/signal. Illustratively, the base station determines the scheduling time of each channel/signal according to the scheduling timing sequence, and then allocates the time-frequency resource corresponding to the scheduling requirement of each channel/signal from the corresponding resource pool.
And S104, mapping the data carried by each channel/signal on the time frequency resource of the corresponding resource pool according to the available time frequency resource allocated to each channel/signal and the scheduling time sequence of each channel/signal.
In this step, the base station performs resource mapping on the time-frequency resources allocated to each channel/signal in the corresponding resource pool, where the resource mapping is to map the data bits carried by the channel/signal to the corresponding time-frequency resources.
Generally, in the OFDM (orthogonal frequency Division Multiplexing) technology, a basic unit of minimum Resource mapping is called a Resource Element (RE) which is composed of one Orthogonal Frequency Division Multiplexing (OFDM) symbol in a time domain and one subcarrier in a frequency domain, and a basic unit of Resource scheduling is a Resource Block (RB) which is composed of 1 OFDM symbol in the time domain and 12 subcarriers. Based on this, in the step of resource mapping, data carried by the channel/signal is mapped on resource elements of the corresponding resource pool.
In the downlink resource mapping method provided in this embodiment, downlink wireless resources of a cell are divided into a plurality of resource pools in advance, and each resource pool is responsible for resource allocation and mapping of a corresponding type of channel/signal, so that after a base station collects channels/signals with scheduling requirements, a scheduling timing sequence of each channel/signal is combined to allocate resources for each channel/signal in the corresponding resource pool according to the type of each channel/signal, thereby completing mapping. Therefore, the resource pool is reasonably divided, the conflict of the mapping positions of the wireless time-frequency resources is effectively avoided, the flexible scheduling of resources among different channels/signals is adapted, and the utilization efficiency of the wireless resources is greatly improved.
On the basis of the above embodiment, in a scenario, the radio resources of the cell are divided into two resource pools, and based on the scenario, the process in the above embodiment of fig. 2 is described in detail below.
In one embodiment, if the resource pool includes a first resource pool and a second resource pool, the first resource pool is used for resource allocation and mapping of the control class channel; the second resource pool is used for resource allocation and mapping of other types of channels besides control type channels.
The base station divides downlink wireless resources into two types of resource pools according to the basic configuration of a cell, and the two types of resource pools are respectively used for a control channel and other types of channels/reference signals. Taking the NR system as an example, the first resource pool is used for resource allocation and mapping of a control channel, such as a Physical Downlink Control Channel (PDCCH), and the second resource pool is used for resource allocation and mapping of other types of channels except the control channel, such as a Physical Downlink Shared Channel (PDSCH), a broadcast synchronization block (SSB), various types of Reference Signals (RS), and the like.
Based on the first resource pool and the second resource pool, determining the resource pool corresponding to each channel/signal according to the type of each channel/signal in the step S102 includes: if the channel/signal is a first type of channel/signal, determining the corresponding resource pool as a first resource pool; the first type of channel/signal comprises a channel/signal for transmitting control information; if the channel/signal is a second type of channel/signal, determining the corresponding resource pool as a second resource pool; the second type of channel comprises SSB, CSI _ RS and PDSCH; wherein, the first kind of channel/signal and the second kind of channel/signal are divided according to the frequency domain granularity of channel/signal scheduling or the purpose of the channel/signal.
Specifically, the base station may classify channels or reference signals having scheduling requests according to different scheduling mechanisms. For NR system, the base station may be classified according to different channels and partial characteristics of the reference signal, such as frequency domain granularity of channel scheduling, channel usage, etc. Dividing channels or reference signals with scheduling requests into two major categories, namely a first category of channels/signals and a second category of channels/signals, wherein the first category of channels/signals comprise channels/signals for transmitting control information, such as PDCCH; the second category of channels/signals includes those used for data transmission, radio environment measurement, system synchronization, etc., such as SSB, CSI _ RS, PDSCH, etc. In this embodiment, each channel/signal is divided into two categories of channels/signals, which correspond to the resource pools divided in the front, so that resource allocation and mapping can be completed for each channel/signal from the respective corresponding resource pools without affecting each other, thereby improving resource mapping efficiency.
Also based on the first resource pool and the second resource pool, the first type of channel/signal, and the second type of channel/signal, the allocating available time-frequency resources in the step S103 includes: and acquiring the available time-frequency resources of the first type of channels/signals from the first resource pool according to the scheduling time sequence and the scheduling requirement of the first type of channels/signals, and acquiring the available time-frequency resources of the second type of channels/signals from the second resource pool according to the scheduling time sequence and the scheduling requirement of the second type of channels/signals.
In this embodiment, the base station allocates available time-frequency resources from the first resource pool for the first type of channel/signal, for example, as shown in fig. 3, assuming that the first type of channel/signal needs to be transmitted in time slot N, the base station needs to complete resource scheduling in time slot N-1, and then complete resource mapping for the first type of channel/signal in N-N, where the value of N may be determined according to actual system requirements.
As can be known from the foregoing description, the second type of channels/signals mainly include different subtypes such as SSB, CSI _ RS, PDSCH, and the like, but since these channels have different resource allocation and mapping priorities in the wireless system, the second type of channels/signals have a common characteristic that the minimum unit of scheduling is RB, and the channel with the lowest priority needs to avoid RE positions occupied by other channels in a rate matching manner to achieve efficient utilization of wireless resources, so as to implement parallelization of resource mapping for removing precedence dependency of the second type of channel resource mapping, an embodiment is provided for the scheduling scheme of the second type of channels/signals, as shown in fig. 4, and the embodiment includes:
s201, according to the scheduling time sequence of the second type of channels/signals, scheduling priority ordering is carried out on target channels/signals in the second type of channels/signals; the target channel/signal is a channel/signal with coupling relation in the resource mapping.
In this embodiment, scheduling priority ranking is performed on channels/signals with coupling relationship in resource mapping in the second type of channels/signals, where the ranking is based on the channel scheduling priority, for example, priority ss B > priority csi _ RS > priority pdsch. Here, the channel/signal with coupling relation in resource mapping means the channel/signal with precedence dependency relation in resource mapping.
S202, according to scheduling priority sequencing, sequentially advancing target channel/signal scheduling configuration by N time slots in the sequence from high priority to low priority to obtain a differential scheduling time sequence of the target channel/signal; n is a positive integer.
Based on the scheduling priority, determining a differential scheduling timing sequence of the target channel/signal, for example, please refer to fig. 3, assuming that each channel/signal in the second type of channel/signal needs to be transmitted in the time slot N, different scheduling timing sequences are set for channels/signals with resource mapping having a sequential dependency relationship, assuming that a certain downlink time slot s lot N transmits the channels/signals a, B, and C, and the resource priorities of the channels/signals are a > B > C, and the scheduling configuration lead of the base station is set to N, the base station needs to complete time-frequency resource allocation of a, B, and C on N-3, N-2, N-1, respectively, wherein the value of N may be determined according to the actual system capability, which is not limited in this embodiment.
And S203, distributing available time-frequency resources for the target channel/signal in the second resource pool according to the differential scheduling time sequence and scheduling requirement of the target channel/signal.
After determining the differential scheduling timing and scheduling requirements of the target channel/signal, the base station allocates available time-frequency resources for the target channel/signal in the second resource pool. It can be understood that, the above method for allocating resources for channels/signals with coupling relationship in resource mapping is used, for channels/signals without a precedence dependency relationship, as with the first type of channels/signals, time-frequency resources may be performed according to a predetermined scheduling timing sequence as needed, and details of this embodiment are not repeated.
In this embodiment, a differentiated scheduling timing sequence is set for the channels/signals with dependency relationship in resource mapping, and the precedence dependency relationship of the second type of channel resource mapping is removed, so that parallel processing of different types of channel resource mapping is realized, and the mapping efficiency of wireless resources is improved.
In an embodiment, the present application further provides an embodiment of the step S104, as shown in fig. 5, where the step S104 includes:
s301, according to the available time frequency resources distributed to each channel/signal and the scheduling time sequence of each channel/signal, generating resource mapping indication information; the resource mapping indication information at least comprises an air interface sending time slot, time domain information, frequency domain information, a channel type and a resource pool number.
The resource mapping indication information is mapping information generated according to available time-frequency resources allocated to each channel/signal by the base station and a scheduling time sequence of each channel/signal, and the mapping information includes an air interface sending time slot (slot n), time domain information, frequency domain information, a channel type and a resource pool number, wherein the time domain information includes an O FDM symbol starting position lstart and a symbol number lsymbol, and the frequency domain information includes an RB starting position RBs tart and an RB number rbnum.
And S302, mapping the data carried by each channel/signal on the time-frequency resource of the corresponding resource pool according to the resource mapping indication information.
And based on each air interface sending time slot, time domain information, frequency domain information, channel type and resource pool number in the resource mapping indication information, the base station maps the data carried by each channel/signal on the time frequency resource of the corresponding resource pool. Alternatively, in practical applications, the base station may put together channels/signals belonging to the same scheduling characteristics for processing, where the same scheduling characteristics indicate that the scheduling characteristics refer to characteristics of having the same scheduling timing and the same resource pool.
In the embodiment, the resource mapping indication information is generated by the time-frequency resources and the scheduling time sequence which are available for each channel/signal, and the basic information required by mapping is clearly and completely indicated, so that the base station can accurately and quickly complete mapping.
In addition, in one embodiment, a resource mapping identification table is set for the resource pool; the resource mapping identification table is used for recording the resource occupation condition in the resource pool; after mapping the data carried by each channel/signal to the time-frequency resource of the corresponding resource pool, the base station clears the flag bit record occupied by the time-frequency resource in each time slot in the resource mapping identification table of each resource pool. Optionally, the resource mapping identifier table includes a corresponding relationship between a slot number in a frame, a symbol number included in a single slot, and subcarrier data included in a resource pool bandwidth.
The resource mapping identifier tables are maintained and updated in the whole implementation process of the scheme, for example, the resource mapping identifier tables of the first resource pool and the second resource pool are respectively marked as Mark1 (i, M, n) and Mark2 (i, M, n), taking an NR system as an example, assuming that SCS =30kHz and a bandwidth 100M, and each wireless frame includes 20 time slots, i in the resource mapping identifier tables represents a time slot number (0.
In combination with the above resource mapping table, an embodiment is provided for the mapping process of the channel/signal with the sequential dependency relationship to the resource mapping: supposing that there are channels/signals a, B, and C on the Slot 10 of the air interface Slot that need to be sent, the resource mapping priorities of a, B, and C are sequentially decreased, C needs to use the remaining resources after mapping a and B, and it is set that the scheduling configuration advance N =2, and the used resource pool is the second resource pool, which can continue referring to fig. 3, according to the scheduling timings of a, B, and C, the base station completes resource scheduling of channels a, B, and C at Slot5, slot6, and Slot7, respectively, and performs resource mapping of each channel at Slot6, slot7, and Slot8, and maintains the resource identifier record table Mark2 (10, m, N) together, as can be seen from the processing flow, when performing resource mapping of a corresponding channel, the channel with a high priority has completed resource mapping by 1 Slot in advance, and updates the corresponding flag bit of the resource identifier table, and each channel only needs to map the data carried by itself to the remaining REs within the scheduling RB range.
In the embodiment, the scheduling time sequences of different channel types are reasonably designed, so that the parallel processing of the resource mapping of different types of channels is realized, and the complexity of the resource mapping is reduced.
It should be understood that although the various steps in the flow diagrams of fig. 2-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternatingly with other steps or at least some of the sub-steps or stages of other steps.
In addition, based on the above method embodiment, the functional modules of the content of the base station are divided, as shown in fig. 6, the base station includes a downlink resource planning module, a downlink resource scheduling management module, and a downlink resource mapping module. Further, as shown in fig. 7, the downlink resource scheduling management module includes a downlink scheduling requirement collection sub-module, a downlink scheduling type classification sub-module, a first resource scheduling sub-module and a second resource scheduling sub-module; as shown in fig. 8, the downlink resource mapping module includes a wireless resource pool management sub-module, a resource mapping indication information distribution sub-module, and a plurality of resource mapping sub-modules;
based on the functional modules divided in the base station, as shown in fig. 9, an embodiment is provided in which each functional module implements the downlink resource mapping apparatus:
s1, a downlink resource planning module is responsible for dividing downlink radio resources into two major resource pools, namely a first resource pool and a second resource pool, according to a cell basic configuration, as shown in fig. 10;
s2, the downlink scheduling requirement collecting submodule is responsible for collecting scheduling requirements of each channel/signal in the downlink time slot;
s3, the downlink scheduling type classification sub-module classifies the channels/signals with scheduling requests according to different scheduling mechanisms, and the channels/signals are respectively a first type channel and a second type channel;
s4, the first resource scheduling submodule is responsible for controlling scheduling time sequence of the first type of channel and distributing available time-frequency resources for the first type of channel, wherein the time-frequency resources of the first type of channel are obtained in the first resource pool, and resource mapping indication information is generated according to distribution results and sent to the resource mapping management module;
s5, the second resource scheduling submodule is responsible for scheduling priority ordering of second different channels/signals, controlling scheduling time sequence of the second channels/signals and distributing available time-frequency resources for the second channels/signals, wherein the second channels/signals are acquired in a second resource pool according to resource requirements, and resource mapping indication information is generated according to distribution results and sent to the resource mapping management module;
s6, the resource mapping indication information distribution submodule is responsible for sending the channels belonging to the same scheduling characteristics to the corresponding resource mapping submodule;
s7, each resource mapping submodule maps data on Resource Elements (RE) of a corresponding resource pool based on a specific rule according to the resource mapping indication information;
and S8, the wireless resource pool management submodule is responsible for the allocation and maintenance of the wireless resource pool resource identification table, namely after the data transmission of the air interface time slot is finished, the wireless resource management submodule needs to clear the time-frequency resource occupation flag bit recording table in the corresponding time slot.
In the above embodiments, each step is only used for dividing the step that is executed when each functional module implements the downlink resource mapping method, and for the detailed process involved in each step, reference may be made to the description of the foregoing downlink resource mapping method embodiment, and this embodiment is not described again here.
In addition, based on the foregoing embodiment of the downlink resource mapping method, the present application further provides another virtual apparatus for downlink resource mapping, and in an embodiment, as shown in fig. 11, there is provided a downlink resource mapping apparatus, including: a demand collection module 10, a scheduling classification module 11, a resource scheduling module 12 and a resource mapping module 13, wherein,
a demand collection module 10, configured to obtain channels/signals with scheduling demands in a cell downlink timeslot and a scheduling timing sequence of each channel/signal; the scheduling timing indicates a resource scheduling time of each channel/signal;
a scheduling classification module 11, configured to determine, according to the type of each channel/signal, a resource pool corresponding to each channel/signal; the resource pool is a plurality of resource pools which divide the downlink wireless resources of the cell in advance according to the basic configuration of the cell, and each resource pool is used for resource allocation and mapping of the corresponding type of channel/signal;
a resource scheduling module 12, configured to allocate available time-frequency resources to each channel/signal in a corresponding resource pool according to a scheduling timing sequence and a scheduling requirement of each channel/signal;
and a resource mapping module 13, configured to map data carried by each channel/signal on the time-frequency resource of the corresponding resource pool according to the available time-frequency resource allocated to each channel/signal and the scheduling timing sequence of each channel/signal.
In one embodiment, the resource pool includes a first resource pool and a second resource pool; the first resource pool is used for controlling resource allocation and mapping of the class channel; the second resource pool is used for resource allocation and mapping of other types of channels besides control type channels.
In an embodiment, the scheduling classification module 11 is configured to determine, if the channel/signal is a first type of channel/signal, that a corresponding resource pool is a first resource pool; the first type of channel/signal comprises a channel/signal for transmitting control information; if the channel/signal is a second type of channel/signal, determining that the corresponding resource pool is a second resource pool; the second type of channels comprise a synchronization block SSB, a reference signal CSI _ RS and a data channel PDSCH, wherein the first type of channels/signals and the second type of channels/signals are divided according to the frequency domain granularity of channel/signal scheduling or the purpose of the channels/signals.
In an embodiment, the resource scheduling module 12 is configured to obtain the available time-frequency resources of the first type of channels/signals from the first resource pool according to the scheduling timing and the scheduling requirement of the first type of channels/signals, and obtain the available time-frequency resources of the second type of channels/signals from the second resource pool according to the scheduling timing and the scheduling requirement of the second type of channels/signals.
In an embodiment, the resource scheduling module 12 is further specifically configured to perform scheduling priority ordering on target channels/signals in the second type of channels/signals according to a scheduling timing sequence of the second type of channels/signals; the target channel/signal is a channel/signal with a coupling relation in resource mapping; according to the scheduling priority sequence, sequentially advancing the target channel/signal scheduling configuration by N time slots in the order of the priority from high to low to obtain the differential scheduling time sequence of the target channel/signal; n is a positive integer; and allocating available time-frequency resources for the target channel/signal in the second resource pool according to the differential scheduling time sequence and scheduling requirements of the target channel/signal.
In an embodiment, the resource mapping module 13 is configured to generate resource mapping indication information according to available time-frequency resources allocated to each channel/signal and a scheduling timing sequence of each channel/signal; the resource mapping indication information at least comprises an air interface sending time slot, time domain information, frequency domain information, a channel type and a resource pool number; and mapping the data carried by each channel/signal on the time-frequency resource of the corresponding resource pool according to the resource mapping indication information.
In one embodiment, the resource pool includes a resource mapping identifier table; the resource mapping identification table is used for recording the resource occupation condition in the resource pool; the device also comprises a management module used for clearing the recording of the occupied zone bit of the time-frequency resource in each time slot in the resource mapping identification table of each resource pool.
In one embodiment, the resource mapping identifier table includes a correspondence relationship between a slot number in a frame, a number of symbols included in a single slot, and subcarrier data included in a resource pool bandwidth.
The implementation principle and technical effect of all downlink resource mapping apparatuses provided in the foregoing embodiments are similar to those of the foregoing downlink resource mapping method embodiments, and are not described herein again.
For specific limitations of the downlink resource mapping apparatus, reference may be made to the above limitations of the downlink resource mapping method, which is not described herein again. All or part of the modules in the downlink resource mapping device can be implemented by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 12. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a downlink resource mapping method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the configuration shown in fig. 12 is a block diagram of only a portion of the configuration associated with the present application, and is not intended to limit the computing device to which the present application may be applied, and that a particular computing device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring channels/signals with scheduling requirements in a cell downlink time slot and scheduling time sequences of the channels/signals; the scheduling timing indicates a resource scheduling time of each channel/signal;
determining a resource pool corresponding to each channel/signal according to the type of each channel/signal; the resource pool is a plurality of resource pools which divide the downlink wireless resources of the cell in advance according to the basic configuration of the cell, and each resource pool is used for resource allocation and mapping of the corresponding type of channel/signal;
according to the scheduling time sequence and the scheduling requirement of each channel/signal, allocating available time-frequency resources for each channel/signal in a corresponding resource pool;
and mapping the data carried by each channel/signal on the time frequency resource of the corresponding resource pool according to the available time frequency resource allocated to each channel/signal and the scheduling time sequence of each channel/signal.
The implementation principle and technical effect of the computer device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, performs the steps of:
acquiring channels/signals with scheduling requirements in a cell downlink time slot and scheduling time sequences of the channels/signals; the scheduling timing indicates a resource scheduling time of each channel/signal;
determining a resource pool corresponding to each channel/signal according to the type of each channel/signal; the resource pool is a plurality of resource pools which divide the downlink wireless resources of the cell in advance according to the basic configuration of the cell, and each resource pool is used for resource allocation and mapping of the corresponding type of channel/signal;
according to the scheduling time sequence and the scheduling requirement of each channel/signal, allocating available time-frequency resources for each channel/signal in a corresponding resource pool;
and mapping the data carried by each channel/signal on the time frequency resource of the corresponding resource pool according to the available time frequency resource allocated to each channel/signal and the scheduling time sequence of each channel/signal.
The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (10)
1. A downlink resource mapping method is characterized in that the method comprises the following steps:
acquiring channels/signals with scheduling requirements in a cell downlink time slot and scheduling time sequences of the channels/signals; the scheduling time sequence represents the resource scheduling time of each channel/signal;
determining a resource pool corresponding to each channel/signal according to the type of each channel/signal; the resource pool is a plurality of resource pools which divide downlink wireless resources of the cell in advance according to the basic configuration of the cell, and each resource pool is used for resource allocation and mapping of channels/signals of corresponding types;
according to the scheduling time sequence and the scheduling requirement of each channel/signal, allocating available time-frequency resources for each channel/signal in a corresponding resource pool;
mapping data carried by each channel/signal on time frequency resources of a corresponding resource pool according to the available time frequency resources distributed to each channel/signal and the scheduling time sequence of each channel/signal;
the resource pools comprise a first resource pool and a second resource pool; the first resource pool is used for controlling resource allocation and mapping of the class channel; the second resource pool is used for resource allocation and mapping of other types of channels except the control type channel.
2. The downlink resource mapping method according to claim 1, wherein determining the resource pool corresponding to each channel/signal according to the type of each channel/signal includes:
if the channel/signal is a first type of channel/signal, determining that the corresponding resource pool is the first resource pool; the first type of channel/signal comprises a channel/signal for transmitting control information;
if the channel/signal is a second type channel/signal, determining that the corresponding resource pool is the second resource pool; the second type of channel/signal comprises a synchronization block SSB, a reference signal CSI-RS and a data channel PDSCH;
wherein the first type of channel/signal and the second type of channel/signal are divided according to the frequency domain granularity of channel/signal scheduling or the purpose of the channel/signal.
3. The method according to claim 2, wherein the allocating available time-frequency resources in a corresponding resource pool for each of the channels/signals according to the scheduling timing and the scheduling requirement of each of the channels/signals comprises:
and acquiring the available time-frequency resources of the first type of channels/signals from the first resource pool according to the scheduling time sequence and the scheduling requirement of the first type of channels/signals, and acquiring the available time-frequency resources of the second type of channels/signals from the second resource pool according to the scheduling time sequence and the scheduling requirement of the second type of channels/signals.
4. The method according to claim 3, wherein the obtaining available time-frequency resources of the second type of channels/signals from the second resource pool according to the scheduling timing and scheduling requirements of the second type of channels/signals comprises:
according to the scheduling time sequence of the second type of channels/signals, performing scheduling priority ordering on target channels/signals in the second type of channels/signals; the target channel/signal is a channel/signal with a coupling relation in resource mapping;
according to the scheduling priority sequence, the target channel/signal scheduling configuration is advanced by N time slots in sequence from high priority to low priority, and a differential scheduling time sequence of the target channel/signal is obtained; n is a positive integer;
and allocating available time-frequency resources for the target channel/signal in the second resource pool according to the differential scheduling time sequence and scheduling requirements of the target channel/signal.
5. The method according to any one of claims 1 to 4, wherein the mapping data carried by each of the channels/signals onto the time-frequency resources of the corresponding resource pool according to the available time-frequency resources allocated to each of the channels/signals and the scheduling timing of each of the channels/signals comprises:
generating resource mapping indication information according to the available time frequency resources distributed to the channels/signals and the scheduling time sequence of the channels/signals; the resource mapping indication information at least comprises an empty sending time slot, time domain information, frequency domain information, a channel type and a resource pool number;
and mapping the data carried by each channel/signal on the time-frequency resource of the corresponding resource pool according to the resource mapping indication information.
6. A downlink resource mapping method according to any one of claims 1-4, wherein the resource pool includes a resource mapping identification table; the resource mapping identification table is used for recording the resource occupation condition in the resource pool;
after mapping the data carried by each channel/signal on the time-frequency resource of the corresponding resource pool, the method further includes: and resetting the occupied zone bit record of the time-frequency resource in each time slot in the resource mapping identification table of each resource pool.
7. The downlink resource mapping method according to claim 6, wherein the resource mapping identification table includes a correspondence between an intra-frame slot number, a number of symbols included in a single slot, and subcarrier data included in a resource pool bandwidth.
8. A downlink resource mapping apparatus, the apparatus comprising:
the system comprises a demand collection module, a scheduling module and a scheduling module, wherein the demand collection module is used for acquiring channels/signals with scheduling demands in a cell downlink time slot and scheduling time sequences of the channels/signals; the scheduling time sequence represents the resource scheduling time of each channel/signal;
a scheduling classification module, configured to determine, according to a type of each channel/signal, a resource pool corresponding to each channel/signal; the resource pool is a plurality of resource pools which divide downlink wireless resources of the cell in advance according to the basic configuration of the cell, and each resource pool is used for resource allocation and mapping of channels/signals of corresponding types;
a resource scheduling module, configured to allocate, according to a scheduling timing sequence and a scheduling requirement of each of the channels/signals, an available time-frequency resource to each of the channels/signals in a corresponding resource pool;
a resource mapping module, configured to map data carried by each of the channels/signals on time-frequency resources of a corresponding resource pool according to the available time-frequency resources allocated to each of the channels/signals and a scheduling timing sequence of each of the channels/signals;
the resource pools comprise a first resource pool and a second resource pool; the first resource pool is used for controlling resource allocation and mapping of the class channel; the second resource pool is used for resource allocation and mapping of other types of channels except the control type channel.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program implements the steps of the downlink resource mapping method according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the downlink resource mapping method according to any one of claims 1 to 7.
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