CN110913368A - Resource scheduling method and device in rail transit communication system - Google Patents
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Abstract
The application discloses a resource scheduling method and device in a rail transit communication system, which are used for reducing mutual interference between adjacent cells in the rail transit communication system. On a network side, a resource scheduling method in a rail transit communication system provided by the embodiment of the application includes: determining available air interface resources; and dividing available air interface resources in a time domain, wherein two adjacent cells respectively use different time domain resources.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a resource scheduling method and apparatus in a rail transit communication system.
Background
In a rail transit communication system, communication signals are generally leaked cable coverage, and the model is shown in fig. 1, between two points x _2 and x _3, and between two cells Cell a and Cell B, both cells have signal coverage, and the purpose is to serve as a switching zone between the two cells. In this interval, since both cell signals exist, there is relatively large interference of the neighboring cell. Specifically, if two terminals exist in a switching band and belong to Cell a and Cell B respectively, downlink data sent by Cell a to the terminals interfere with the terminals in Cell B, and Cell B also interferes with Cell a in the same manner; if a terminal is located in the handover zone and belongs to Cell a, the uplink signal transmitted by the terminal can be received by Cell B, that is, the uplink traffic of Cell B is interfered. In a rail transit communication system, the requirements on the reliability and the time delay performance of signals are high, and if excessive retransmission is caused due to an empty port, the train communication system is adversely affected.
Disclosure of Invention
The embodiment of the application provides a resource scheduling method and device in a rail transit communication system, which are used for reducing mutual interference between adjacent areas in the rail transit communication system.
On a network side, a resource scheduling method in a rail transit communication system provided by the embodiment of the application includes:
determining available air interface resources;
and dividing available air interface resources in a time domain, wherein two adjacent cells respectively use different time domain resources.
By the resource scheduling method in the rail transit communication system, the available air interface resources are determined and divided in the time domain, wherein two adjacent cells respectively use different time domain resources, so that the mutual interference between adjacent cells in the rail transit communication system can be reduced.
Correspondingly, on the terminal side, the data transmission method in the rail transit communication system provided by the embodiment of the application comprises the following steps:
determining available time domain resources of the cell; wherein, the local cell and the adjacent cell respectively use different time domain resources;
and carrying out data transmission on the available time domain resources of the cell.
On the network side, a resource scheduling apparatus in a rail transit communication system provided in an embodiment of the present application includes:
a first unit, configured to determine available air interface resources;
a second unit, configured to divide available air interface resources in a time domain, where two adjacent cells respectively use different time domain resources.
On a terminal side, a data transmission device in a rail transit communication system provided by an embodiment of the present application includes:
a determining unit, configured to determine available time domain resources of a local cell; wherein, the local cell and the adjacent cell respectively use different time domain resources;
and the transmission unit is used for transmitting data in the available time domain resources of the cell.
Another embodiment of the present application provides a computing device, which includes a memory and a processor, wherein the memory is used for storing program instructions, and the processor is used for calling the program instructions stored in the memory and executing any one of the above methods according to the obtained program.
Another embodiment of the present application provides a computer storage medium having stored thereon computer-executable instructions for causing a computer to perform any one of the methods described above.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a rail transit communication system in the prior art;
fig. 2 is a schematic flow diagram illustrating a process of transmitting a PDCCH for scheduling a PDSCH in a corresponding time domain resource according to an embodiment of the present application;
fig. 3 is a schematic flowchart of a process of scheduling PUSCH data to be transmitted in divided uplink time domain resources according to an embodiment of the present application;
fig. 4 is a flowchart illustrating a resource scheduling method in a rail transit communication system according to an embodiment of the present application;
fig. 5 is a schematic flowchart of a data transmission method in a rail transit communication system according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a resource scheduling apparatus in a rail transit communication system according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a data transmission device in a rail transit communication system according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a resource scheduling apparatus in another rail transit communication system according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of another data transmission device in a rail transit communication system according to an embodiment of the present application.
Detailed Description
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 only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a resource scheduling method and device in a rail transit communication system, which are used for reducing mutual interference between adjacent areas in the rail transit communication system.
The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a universal microwave Access (WiMAX) system, a 5G NR system, and the like. These various systems include terminal devices and network devices.
The terminal device referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. The names of the terminal devices may also be different in different systems, for example, in a 5G system, the terminal devices may be referred to as User Equipments (UEs). Wireless terminal devices, which may be mobile terminal devices such as mobile telephones (or "cellular" telephones) and computers with mobile terminal devices, e.g., mobile devices that may be portable, pocket, hand-held, computer-included, or vehicle-mounted, communicate with one or more core networks via the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment.
The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to interconvert received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) or a Code Division Multiple Access (CDMA), may also be a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may also be an evolved network device (eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station in a 5G network architecture (next generation system), or may also be a home evolved node B (HeNB), a relay node (HeNB), a home base station (femto), a pico base station (pico), and the like, which are not limited in the embodiments of the present application.
Various embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the display sequence of the embodiment of the present application only represents the sequence of the embodiment, and does not represent the merits of the technical solutions provided by the embodiments.
Because in the rail transit system, signal coverage is carried out through leaking the cable, whole communication system is linear with subway line and is covered. There will be only two neighbouring cells per cell and these two neighbouring cells are located in the two directions in which the leaky cable extends, respectively. The embodiment of the application provides a time division scheduling strategy, for example, different time domain resources are respectively used for any two adjacent cells Cell a and Cell B to reduce signal interference between any two adjacent cells in a switching zone, so that time delay of train communication signals in the switching zone can be reduced, and meanwhile, the switching success rate can be improved. The specific scheme is introduced as follows:
and dividing available air interface resources in a time domain, wherein two adjacent cells respectively use different time domain resources. For the same cell, uplink and downlink time domain resources can be divided separately.
The division of time domain resources can configure each cell independently. If the planning of the Physical Cell Identity (PCI) is increased according to the sequence of each cell, the time domain resources can be automatically divided according to the parity of the PCI. In LTE networks, typically when planning a cell network, the PCI may follow certain rules, e.g. all LTE cells of a subway line, when their PCIs increase in order, e.g.: 1. 2, 3, 4, 5 … …, the PCIs of two adjacent cells are odd one and even one. Then, the time domain resource partitioning may be performed according to parity property of PCI.
Alternatively, the time domain resources may be divided in units of subframes, half radio frames, or other time units.
Optionally, for any Cell, besides the downlink signals defined by the protocol, such as Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), Physical Broadcast Channel (PBCH), System Information Block (SIB), Cell-specific reference signal (CRS), and the like, fixed timings, all data carried on the Physical Downlink Shared Channel (PDSCH) are transmitted in the Cell time domain resource, and the Physical Downlink Control Channel (PDCCH) scheduling the PDSCH is also transmitted in the corresponding time domain resource, as shown in fig. 2.
Referring to fig. 3, the scheduling for PUSCH data is also transmitted entirely within the divided uplink time domain resources.
The time domain position of a Physical Uplink Control Channel (PUCCH) format (format)1 is controlled by a parameter scheduling request configuration index (sr-ConfigIndex), and by setting this parameter, the time domain resource of the PUCCH format 1 is limited to the time domain resource position occupied by a Physical Uplink Shared Channel (PUSCH). In the LTE system, sr-ConfigIndex is one of many parameters that a base station higher layer configures to a UE higher layer, and the following parameters are the same.
The periodic Channel Quality Indication (CQI) time domain transmission carried by the PUCCH format 2x is configured by the parameter CQI-pmi-ConfigIndex, and by adjusting the parameter configuration, the PUCCH format 2 can be transmitted on the PUSCH time domain resource. Here, PUCCH format 2x may refer to PUCCH format 2, PUCCH format 2a, and PUCCH format 2 b.
The PRACH (Physical Random Access Channel) transmission time domain resource location is determined by the parameter PRACH-ConfigIndex, and the PRACHPreamble can be transmitted on the PUSCH time domain resource by adjusting the parameter configuration.
The SRS transmission time domain resource position is determined by the parameter SRS-subframe configuration, and by adjusting the parameter configuration, the SRS (Sounding Reference Signal) can be transmitted on the PUSCH time domain resource.
The LTE protocol specifies different Downlink (DL)/Uplink (UL) hybrid automatic repeat request (HARQ) timing and PUSCH scheduling timing for different frame structures. By restricting the uplink and downlink time domain resource allocation rule, the PDCCH/PHICH for scheduling PUSCH of each cell can fall in the downlink time domain resource of the cell as much as possible in the time domain, and the PUCCH for carrying HARQ falls in the uplink time domain resource of the cell as much as possible in the time domain.
Optionally, in consideration of service transmission delay, the time domain resource division period for any two neighboring cells may be 10ms and 20 ms; the time domain resource division period refers to that two adjacent cells respectively occupy a part of time frequency resources in one period. And repeating the resource division rule of the previous period in the next time period.
Optionally, according to the service load conditions of two adjacent cells, the time domain resource occupation ratio of any two adjacent cells may be determined through different configurations.
Taking two adjacent LTE cells as a cell a and a cell B, respectively, and their respective physical resources are an uplink time domain resource a, a downlink time domain resource a, and an uplink time domain resource B, a downlink time domain resource B, as an example, the specific description is as follows:
for the FDD frame structure, the time lengths of the downlink time domain resource A and the uplink time domain resource A are kept consistent, and the starting time of the uplink time domain resource A is 4ms later than the starting time of the downlink time domain resource A; the division mode of the time domain resource B is similar;
for the TDD frame structure, the subframe ratio 0 (an uplink and downlink subframe configuration of an LTE TDD system, the same applies below) is as follows:
TABLE 1 TDD subframe proportioning 010 ms period division strategy
D _ A, U _ A, S _ a represents downlink, uplink, and special subframes of time domain resource a (time domain resource of cell a), respectively, and D _ B, U _ B, S _ B represents downlink, uplink, and special subframes of time domain resource B (time domain resource of cell B), respectively.
TABLE 2 TDD subframe ratio 020 ms period division strategy
The TDD frame structure has the following subframe ratio 1:
TABLE 3 TDD subframe proportioning 110 ms period partition strategy
TABLE 4 TDD subframe proportioning 120 ms period partition strategy
The TDD frame structure has the following subframe ratio 2:
TABLE 5 TDD subframe proportioning 210 ms period partition strategy
TABLE 6 TDD subframe ratio 220 ms period partition strategy
In summary, referring to fig. 4, a resource scheduling method in a rail transit communication system provided in an embodiment of the present application includes:
s101, determining available air interface resources;
and S102, dividing available air interface resources in a time domain, wherein two adjacent cells respectively use different time domain resources.
Optionally, uplink and downlink time domain resources of the same cell are different.
Optionally, the available air interface resources are divided into cells in the time domain according to the physical cell identifier PCI of the cell.
Optionally, for each cell, the data carried on the PDSCH and the PDCCH scheduling the PDSCH are sent in the time domain resources partitioned to the cell.
Optionally, for each cell, the scheduling for the physical uplink shared channel, PUSCH, data is sent within uplink time domain resources partitioned to that cell.
Optionally, by setting a parameter sr-ConfigIndex, the time domain resource of the physical uplink control channel PUCCH format 1 is limited to the time domain resource position occupied by the PUSCH.
Optionally, by setting a parameter cqi-pmi-ConfigIndex, a time domain resource of a physical uplink control channel PUCCH format 2x is limited to a time domain resource position occupied by the PUSCH.
Optionally, by setting a parameter PRACH-ConfigIndex, a time domain resource of a physical random access channel PRACH is limited to a time domain resource position occupied by the PUSCH.
Optionally, the time domain resource of the sounding reference signal SRS is limited to the time domain resource position occupied by the PUSCH by setting a parameter SRS-subframe config.
Optionally, the time domain resource division period of any two adjacent cells is 10ms or 20 ms.
Optionally, the time domain resource occupation ratio of the two adjacent cells is determined according to the service load conditions of the two cells.
Optionally, for the FDD frame structure, the time lengths of the downlink time domain resource and the uplink time domain resource of the same cell are kept consistent, and the starting time of the uplink time domain resource is 4ms later than the starting time of the downlink time domain resource.
Optionally, for a subframe ratio 0 of the TDD frame structure, when a time domain resource division period of 10ms is adopted, time domain resource division of the adjacent cell a and cell B is as shown in the following table:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
Optionally, for a subframe ratio 0 of the TDD frame structure, when a time domain resource division period of 20ms is adopted, the time domain resource division of the adjacent cell a and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
Optionally, for the subframe ratio 1 of the TDD frame structure, when a time domain resource division period of 10ms is adopted, the time domain resource division of the adjacent cell a and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
Optionally, for the subframe ratio 1 of the TDD frame structure, when a time domain resource division period of 20ms is adopted, the time domain resource division of the adjacent cell a and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
Optionally, for the subframe ratio 2 of the TDD frame structure, when a time domain resource division period of 10ms is adopted, the time domain resource division of the adjacent cell a and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
Optionally, for subframe ratio 2 of the TDD frame structure, when a time domain resource division period of 20ms is adopted, the time domain resource division of the adjacent cell a and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
Correspondingly, referring to fig. 5, an embodiment of the present application provides a data transmission method in a rail transit communication system, including:
s201, determining available time domain resources of the cell; wherein, the local cell and the adjacent cell respectively use different time domain resources;
s202, data transmission is carried out on the available time domain resources of the cell.
Optionally, uplink and downlink time domain resources of the cell are different.
Correspondingly, referring to fig. 6, an embodiment of the present application provides a resource scheduling apparatus in a rail transit communication system, including:
a first unit 11, configured to determine available air interface resources;
a second unit 12, configured to divide available air interface resources in a time domain, where two adjacent cells respectively use different time domain resources.
Accordingly, on the terminal side, referring to fig. 7, an embodiment of the present application provides a data transmission device in a rail transit communication system, including:
a determining unit 21, configured to determine a time domain resource available in the cell; wherein, the local cell and the adjacent cell respectively use different time domain resources;
a transmission unit 22, configured to perform data transmission on the time domain resources available in the cell.
It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiment of the present application provides a computing device, which may specifically be a desktop computer, a portable computer, a smart phone, a tablet computer, a Personal Digital Assistant (PDA), and the like. The computing device may include a Central Processing Unit (CPU), memory, input/output devices, etc., the input devices may include a keyboard, mouse, touch screen, etc., and the output devices may include a Display device, such as a Liquid Crystal Display (LCD), a Cathode Ray Tube (CRT), etc.
The memory may include Read Only Memory (ROM) and Random Access Memory (RAM), and provides the processor with program instructions and data stored in the memory. In the embodiments of the present application, the memory may be used for storing a program of any one of the methods provided by the embodiments of the present application.
The processor is used for executing any one of the methods provided by the embodiment of the application according to the obtained program instructions by calling the program instructions stored in the memory.
Embodiments of the present application provide a computer storage medium for storing computer program instructions for an apparatus provided in the embodiments of the present application, which includes a program for executing any one of the methods provided in the embodiments of the present application.
The computer storage media may be any available media or data storage device that can be accessed by a computer, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.
The method provided by the embodiment of the application can be applied to network equipment.
A network device may be a base station (e.g., access point) that refers to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a base Station (NodeB) in WCDMA, an evolved Node B (NodeB or eNB or e-NodeB) in LTE, or a gNB in 5G system. The embodiments of the present application are not limited.
Referring to fig. 8, a network side device provided in an embodiment of the present application includes:
the processor 500, which is used to read the program in the memory 520, executes the following processes:
determining available air interface resources;
and dividing available air interface resources in a time domain, wherein two adjacent cells respectively use different time domain resources.
Optionally, uplink and downlink time domain resources of the same cell are different.
Optionally, the processor 500 may divide the available air interface resources into the cells in the time domain according to the physical cell identifier PCI of the cell.
Alternatively, for each cell, the processor 500 transmits data carried on the PDSCH, which is a physical downlink shared channel, and the PDCCH on which the PDSCH is scheduled to the terminal through the transceiver 510 within the time domain resources partitioned for the cell.
Optionally, for each cell, the scheduling for the physical uplink shared channel, PUSCH, data is sent within uplink time domain resources partitioned to that cell.
Optionally, the processor 500 limits the time domain resource of the PUCCH format 1 of the physical uplink control channel to the time domain resource position occupied by the PUSCH by setting the parameter sr-ConfigIndex.
Optionally, the processor 500 limits the time domain resource of the PUCCH format 2x of the physical uplink control channel to the time domain resource position occupied by the PUSCH by setting the parameter cqi-pmi-ConfigIndex.
Optionally, the processor 500 limits the time domain resource of the PRACH to the time domain resource position occupied by the PUSCH by setting a parameter PRACH-ConfigIndex.
Optionally, the processor 500 limits the time domain resource of the sounding reference signal SRS to the time domain resource position occupied by the PUSCH by setting a parameter SRS-subframe config.
Optionally, the time domain resource division period of any two adjacent cells is 10ms or 20 ms.
Optionally, the processor 500 determines the time domain resource occupation ratio of two adjacent cells according to the traffic load conditions of the two cells.
Optionally, for the FDD frame structure, the time lengths of the downlink time domain resource and the uplink time domain resource of the same cell are kept consistent, and the starting time of the uplink time domain resource is 4ms later than the starting time of the downlink time domain resource.
Optionally, for the subframe configurations 0, 1, and 2 of the TDD frame structure, the processor 500 configures time domain resources according to the above list.
A transceiver 510 for receiving and transmitting data under the control of the processor 500.
Where in fig. 8, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 500 and memory represented by memory 520. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.
The processor 500 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD).
Referring to fig. 9, a terminal device provided in an embodiment of the present application includes:
the processor 600, which is used to read the program in the memory 620, executes the following processes:
determining available time domain resources of the cell; wherein, the local cell and the adjacent cell respectively use different time domain resources;
data transmission is performed on the time domain resources available in the cell via the transceiver 610.
A transceiver 610 for receiving and transmitting data under the control of the processor 600.
Where in fig. 9, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 630 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.
Alternatively, the processor 600 may be a CPU (central processing unit), an ASIC (Application specific integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).
To sum up, the embodiment of the present application provides a method for reducing mutual interference between neighboring cells through time domain resource allocation in an LTE track traffic system, so as to avoid interference of PDCCH and pucchh arq between neighboring cells as much as possible; mutual interference of PUCCH format 1/PUCCH format 2x/SRS/PRACH channels between adjacent regions can be completely avoided; time domain resource division can be automatically carried out according to the cell PCI; in addition, the embodiment of the application provides a specific time domain resource division method of FDD and TDD matching (config)0/1/2, and provides two adjacent time domain resource division suggestions of 10ms and 20 ms. In a word, the embodiment of the application solves the problem of mutual interference between adjacent areas of the LTE wireless communication system in the rail transit switching zone. Compared with the current frequency ICIC technology, the method can avoid the mutual interference of the traffic channels between adjacent regions, and can also avoid the mutual interference between PUCCH format 1/PUCCH format 2 x/SRS/PRACH. And aiming at the coverage area of the adjacent cell and the specific application condition of the service model, the time domain resources of the adjacent cell can be flexibly configured. Uplink and downlink time domain resources are configured independently, and mutual interference of a basic PDCCH/PHICH/PUCCH HARQ channel between adjacent cells can be solved or solved. The time domain resources of the cell may be automatically configured according to the PCI of the LTE cell.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (21)
1. A resource scheduling method in a rail transit communication system is characterized by comprising the following steps:
determining available air interface resources;
dividing available air interface resources in a time domain, wherein two adjacent cells respectively use different time domain resources; the uplink and downlink time domain resources of the same cell are different; dividing available air interface resources on a time domain, wherein the dividing comprises the following steps: and dividing available air interface resources to the cells on the time domain according to the Physical Cell Identifiers (PCIs) of the cells.
2. The method of claim 1, wherein for each cell, data carried on a Physical Downlink Shared Channel (PDSCH) and a Physical Downlink Control Channel (PDCCH) scheduling the PDSCH are transmitted in time domain resources partitioned to the cell.
3. The method of claim 1, wherein for each cell, the scheduling for physical uplink shared channel, PUSCH, data is sent in uplink time domain resources partitioned to that cell.
4. The method according to claim 3, wherein the time domain resources of a Physical Uplink Control Channel (PUCCH) format 1 are limited to the time domain resource position occupied by the PUSCH by setting a parameter sr-ConfigIndex.
5. The method according to claim 3, wherein the time domain resources of physical uplink control channel PUCCH format 2x are restricted to the time domain resource position occupied by the PUSCH by setting a parameter cqi-pmi-ConfigIndex.
6. The method according to claim 3, wherein the time domain resource of PRACH is restricted to the time domain resource position occupied by the PUSCH by setting parameter PRACH-ConfigIndex.
7. The method according to claim 3, wherein the time domain resources of Sounding Reference Signal (SRS) are limited to the time domain resource position occupied by the PUSCH by setting a parameter SRS-subframe config.
8. The method of claim 1, wherein the time domain resource partition period of any two adjacent cells is 10ms or 20 ms.
9. The method of claim 1, wherein the time domain resource ratio of two adjacent cells is determined according to traffic load conditions of the two cells.
10. The method of claim 1, wherein for a frequency division duplex, FDD, frame structure, the time lengths of the downlink time domain resource and the uplink time domain resource of the same cell are kept the same, and the starting time of the uplink time domain resource is 4ms later than the starting time of the downlink time domain resource.
11. The method of claim 1, wherein for subframe ratio 0 of the TDD frame structure, when a time domain resource partition period of 10ms is adopted, the time domain resource partition of the neighboring cell A and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
12. The method of claim 1, wherein for subframe ratio 0 of the TDD frame structure, when a time domain resource partition period of 20ms is adopted, the time domain resource partition of the neighboring cell A and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
13. The method of claim 1, wherein for subframe ratio 1 of the TDD frame structure, when a time domain resource partition period of 10ms is adopted, the time domain resource partitions of the neighboring cells a and B are as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
14. The method of claim 1, wherein for subframe ratio 1 of the TDD frame structure, when a time domain resource partition period of 20ms is adopted, the time domain resource partition of the neighboring cell A and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
15. The method of claim 1, wherein for subframe ratio 2 of the TDD frame structure, when a time domain resource partition period of 10ms is adopted, the time domain resource partition of the neighboring cell A and cell B is as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
16. The method of claim 1, wherein for subframe ratio 2 of the TDD frame structure, when a time domain resource partition period of 20ms is adopted, the time domain resource partitions of the adjacent cell A and cell B are as follows:
wherein, D _ A, U _ A, S _ a represents downlink, uplink and special sub-frame of time domain resource of cell a, respectively, and D _ B, U _ B, S _ B represents downlink, uplink and special sub-frame of time domain resource of cell B, respectively.
17. A data transmission method in a rail transit communication system, the method comprising:
determining available time domain resources of the cell; wherein, the local cell and the adjacent cell respectively use different time domain resources, and the uplink and downlink time domain resources of the local cell are different;
and carrying out data transmission on the available time domain resources of the cell.
18. A resource scheduling apparatus in a rail transit communication system, the apparatus comprising:
a first unit, configured to determine available air interface resources;
a second unit, configured to divide available air interface resources in a time domain, where two adjacent cells respectively use different time domain resources; the uplink and downlink time domain resources of the same cell are different; dividing available air interface resources on a time domain, wherein the dividing comprises the following steps: and dividing available air interface resources to the cells on the time domain according to the Physical Cell Identifiers (PCIs) of the cells.
19. A data transmission apparatus in a rail transit communication system, the apparatus comprising:
a determining unit, configured to determine available time domain resources of a local cell; wherein, the local cell and the adjacent cell respectively use different time domain resources; the uplink and downlink time domain resources of the same cell are different;
and the transmission unit is used for transmitting data in the available time domain resources of the cell.
20. A computing device, comprising:
a memory for storing program instructions;
a processor for calling program instructions stored in said memory to perform the method of any of claims 1 to 17 in accordance with the obtained program.
21. A computer storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any one of claims 1 to 17.
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