CN107666368B - TTI dynamic adjustment method, base station, user terminal, equipment and system - Google Patents
TTI dynamic adjustment method, base station, user terminal, equipment and system Download PDFInfo
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- CN107666368B CN107666368B CN201610615064.1A CN201610615064A CN107666368B CN 107666368 B CN107666368 B CN 107666368B CN 201610615064 A CN201610615064 A CN 201610615064A CN 107666368 B CN107666368 B CN 107666368B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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Abstract
The invention discloses a dynamic adjustment method of a transmission time interval, a base station, a user terminal, equipment and a system. The method comprises the following steps: acquiring a service demand parameter sent by a user terminal; inquiring a corresponding relation table of the service demand parameters and Transmission Time Intervals (TTI) according to the service demand parameters, and determining the TTI corresponding to the service demand parameters, wherein the TTI is a first TTI less than 1ms or a second TTI equal to 1 ms; transmitting configuration information including TTI configuration information to a user terminal; and sending the scheduling information corresponding to the configuration information to the user terminal so that the user terminal can adjust the TTI length and receive the scheduling information. Aiming at an LTE system, the invention designs a TTI with smaller granularity to meet the scheduling requirement of new services on short delay; the length of TTI can be dynamically adjusted according to the service bearing type, so that the TTI can more flexibly adapt to different requirements of different service types on time delay.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method, a base station, a user equipment, a device, and a system for dynamically adjusting a transmission time interval.
Background
A Transmission Time Interval (TTI) is a minimum measure of physical layer Transmission resources of an LTE (Long Term Evolution of the universal mobile telecommunications technology) system, that is, in an LTE system standard, a minimum scheduling Time is 1 TTI, which is 1 ms.
With the realization of new wireless services such as car networking, remote fine control and the like on 4G, new requirements are put forward on network delay, the conventional TTI size of 1ms limits the development requirements of short-delay services, and a 5G new air interface still needs to wait for years, so that a TTI design with smaller granularity based on an LTE system is urgently needed and is flexible and configurable to meet the development requirements of new services.
Disclosure of Invention
In view of the above technical problems, the present invention provides a method, a base station, a user terminal, a device and a system for dynamically adjusting a transmission time interval, and a TTI with smaller granularity is designed to meet the scheduling requirement of a new service for a short delay.
According to an aspect of the invention, a long term evolution, LTE, device is provided, the LTE device supporting a first transmission time interval, TTI, wherein the first TTI is less than 1 ms.
In one embodiment of the invention, the LTE device further supports a second TTI, wherein the second TTI is equal to 1 ms.
In one embodiment of the present invention, the first TTI is equal to N times the orthogonal frequency division multiplexing, OFDM, symbol, where N is an integer greater than 0 and less than 14.
In one embodiment of the present invention, the LTE device supports a plurality of first TTIs with different durations.
According to another aspect of the present invention, there is provided a base station, including a service parameter obtaining module, a transmission interval obtaining module, a configuration information sending module, and a scheduling information sending module, wherein:
the service parameter acquisition module is used for acquiring service requirement parameters sent by the user terminal;
a transmission interval acquisition module, configured to query a correspondence table between a service requirement parameter and a transmission time interval TTI according to the service requirement parameter, and determine a TTI corresponding to the service requirement parameter, where the TTI is a first TTI smaller than 1ms or a second TTI equal to 1 ms;
a configuration information sending module, configured to send configuration information to a user equipment, where the configuration information includes TTI configuration information;
and the scheduling information sending module is used for sending the scheduling information corresponding to the configuration information to the user terminal so that the user terminal can adjust the TTI length and receive the scheduling information.
In an embodiment of the present invention, the base station further includes a terminal capability obtaining module and a terminal capability identifying module, wherein:
the terminal capacity acquisition module is used for acquiring the capacity information of the user terminal;
the terminal capability identification module is used for judging whether the user terminal supports the first TTI or not according to the capability information of the user terminal; if the user terminal does not support the first TTI, indicating a configuration information sending module to execute the operation of sending the configuration information to the user terminal, wherein the TTI configuration information is second TTI configuration information; and if the user terminal supports the first TTI, indicating the service parameter acquisition module to execute the operation of acquiring the service requirement parameters sent by the user terminal.
In an embodiment of the present invention, the base station is an LTE device described in any of the above embodiments.
According to another aspect of the present invention, there is provided a user equipment, including a service parameter sending module, a configuration information receiving module, a transmission interval adjusting module, and a scheduling information receiving module, wherein:
a service parameter sending module, configured to send a service requirement parameter to a base station, so that the base station queries, according to the service requirement parameter, a correspondence table between the service requirement parameter and a transmission time interval TTI, and determines a TTI corresponding to the service requirement parameter, where the TTI is a first TTI smaller than 1ms or a second TTI equal to 1 ms;
a configuration information receiving module, configured to receive configuration information sent by a base station, where the configuration information includes TTI configuration information;
a transmission interval adjusting module, configured to adjust the TTI length according to the configuration information;
and the scheduling information receiving module is used for receiving the scheduling information which is sent by the base station and corresponds to the configuration information.
In an embodiment of the present invention, the user terminal further includes a terminal capability sending module, wherein:
and the terminal capability sending module is used for sending the capability information of the user terminal to the base station so that the base station can judge whether the user terminal supports the first TTI according to the capability information of the user terminal, and the service requirement parameter sent by the service parameter sending module is obtained under the condition that the user terminal supports the first TTI.
In an embodiment of the present invention, the ue is an LTE device described in any of the above embodiments.
According to another aspect of the present invention, there is provided a long term evolution LTE system, comprising a user terminal and a base station as described in any of the above embodiments.
In an embodiment of the present invention, the ue is the ue described in any of the above embodiments.
According to another aspect of the present invention, there is provided a transmission time interval dynamic adjustment method, including:
acquiring a service demand parameter sent by a user terminal;
inquiring a corresponding relation table of the service demand parameters and Transmission Time Intervals (TTI) according to the service demand parameters, and determining the TTI corresponding to the service demand parameters, wherein the TTI is a first TTI less than 1ms or a second TTI equal to 1 ms;
sending configuration information to a user terminal, wherein the configuration information comprises TTI configuration information;
and sending the scheduling information corresponding to the configuration information to the user terminal so that the user terminal can adjust the TTI length and receive the scheduling information.
In one embodiment of the invention, the method further comprises:
acquiring capability information of a user terminal;
judging whether the user terminal supports the first TTI or not according to the capability information of the user terminal;
if the user terminal does not support the first TTI, executing the step of sending the configuration information to the user terminal, wherein the TTI configuration information is second TTI configuration information;
and if the user terminal supports the first TTI, executing the step of acquiring the service requirement parameters sent by the user terminal.
According to another aspect of the present invention, there is provided a transmission time interval dynamic adjustment method, including:
sending a service demand parameter to a base station so that the base station can query a corresponding relation table of the service demand parameter and a Transmission Time Interval (TTI) according to the service demand parameter and determine the TTI corresponding to the service demand parameter, wherein the TTI is a first TTI smaller than 1ms or a second TTI equal to 1 ms;
receiving configuration information sent by a base station, wherein the configuration information comprises TTI configuration information;
adjusting the TTI length according to the configuration information;
and receiving scheduling information which is sent by the base station and corresponds to the configuration information.
In one embodiment of the invention, the method further comprises:
and sending the capability information of the user terminal to the base station so that the base station can judge whether the user terminal supports the first TTI according to the capability information of the user terminal, and acquiring the service requirement parameters sent by the user terminal under the condition that the user terminal supports the first TTI.
Aiming at an LTE system, the invention designs a TTI with smaller granularity to meet the scheduling requirement of new services on short time delay.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a diagram illustrating a conventional transmission time interval.
Fig. 2 is a diagram illustrating a first transmission time interval according to an embodiment of the invention.
FIG. 3 is a diagram illustrating coexistence of TTIs of different types according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating a time division coexistence of TTIs of different types according to an embodiment of the present invention.
FIG. 5 is a diagram illustrating frequency division coexistence of TTIs of different types according to an embodiment of the present invention.
Fig. 6 is a diagram illustrating a base station according to a first embodiment of the present invention.
Fig. 7 is a diagram illustrating a base station according to a second embodiment of the present invention.
Fig. 8 is a diagram illustrating a dynamic adjustment method of a tti according to a first embodiment of the present invention.
Fig. 9 is a schematic diagram of an embodiment of a ue of the present invention.
Fig. 10 is a diagram illustrating a dynamic adjustment method of a tti according to a second embodiment of the present invention.
Fig. 11 is a diagram of an LTE system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The invention redesigns the formats of PDCCH (Physical Downlink Control Channel) and PDSCH (Physical Downlink Shared Channel) to meet the realization of different TTI lengths. As shown in fig. 1, in the LTE system, a conventional scheduling minimum unit is 1ms, and one TTI is divided into 14 OFDM (Orthogonal Frequency Division Multiplexing) symbols (symbols), where the PDCCH occupies the first 1-3 OFDM symbols and the rest is occupied by the PDSCH.
According to an aspect of the invention, an LTE device is provided, which supports a first transmission time interval, TTI, wherein the first TTI is less than 1 ms.
In one embodiment of the invention, the first TTI is equal to N times the OFDM symbol, where N is an integer greater than 0 and less than 14.
The above embodiments of the present invention adjust the TTI length to be equal to various number combinations of OFDM symbols by redesigning PDCCH and PDSCH channel formats. Specifically, the above embodiments of the present invention redefine the TTI length to be N times the OFDM symbol, i.e. N times 1/14ms, such as 5/7ms, 2/7ms, 1/14ms, etc. For example: in the embodiment of fig. 2, the TTI is 1/2ms, which is 7 OFDM symbols.
In one TTI, part of the OFDM symbols are used for PDCCH channels and the rest are used for PDSCH channels. The PDCCH and PDSCH channels need to be redesigned.
In one embodiment of the invention, the LTE device may support both a first TTI (short TTI) and a second TTI (legacy TTI), wherein the second TTI is equal to 1 ms.
In one embodiment of the present invention, the LTE device may support a plurality of first TTIs with different durations.
In the above embodiment of the present invention, as shown in fig. 3, a new short TTI is used in the network, and the new short TTI can coexist with a conventional TTI with a length of 1ms, and the short TTI is only scheduled for the new terminal, is transparent to the conventional terminal, and supports backward compatibility.
In a specific using process, the network notifies the terminal of configuration information such as TTI through RRC layer signaling, and sends related scheduling information to the terminal through a PDCCH channel. And the terminal adjusts the TTI length to receive the scheduling information. The network establishes a bearer corresponding to a QoS (Quality of Service) level according to a Service type initiated by the terminal, where the bearer includes a requirement for delay, and a Service such as a Channel Quality Indicator (CQI) of 3 corresponds to a real-time game, and the requirement for delay is within 50ms, and the network schedules resources according to the requirement and a corresponding TTI, such as TTI 1/2, to meet the requirement for delay of the real-time Service. In a 5G network, a QoS class with a lower delay requirement is used for real-time services, such as an anti-collision car networking service, a remote control service, and the like, and at present, the air interface delay of 1ms is about 17ms, which cannot meet the requirements of the air interface delay of the services even reaching a millisecond level, so that a novel short TTI is designed.
In the above embodiments of the present invention, the LTE device may be a base station, a user terminal, an LTE system, or an LTE enhanced system.
Based on the LTE equipment provided by the embodiment of the invention, the novel TTI design aiming at the minimum scheduling time length of the existing LTE system is provided, the limitation of the original scheduling time delay of 1ms is broken through, the shorter scheduling period which is integral multiple of OFDM symbols is realized by redesigning the PDCCH and the PDSCH, and the TTI with smaller granularity can meet the scheduling requirement of new services on short time delay.
The embodiment of the invention can redesign the requirement of the new service with more rigorous time delay requirement aiming at all LTE systems and LTE enhancement systems, and can realize 4G of the 5G new service.
However, if the network uses the same short TTI in order to meet the low delay requirement of a service, the network will waste network resources greatly, and it is not always possible to meet the requirements of other long delay services.
Therefore, the present invention also provides a flexible and dynamic TTI adjustment and use method according to the service type, where TTIs of different types can be used in the same network, as shown in fig. 3. In the preferred embodiment of the present invention, it is recommended to use Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM) to distinguish different services, as shown in fig. 4 and fig. 5, that is, different services are processed in blocks from the time domain or the frequency domain, TTIs with different lengths are collectively scheduled in blocks, which is convenient for the realization of network scheduling function and centralized management.
The above embodiment of the present invention may also dynamically adjust the TTI length according to the service bearer type, so that it can more flexibly adapt to different requirements of different service types on the time delay.
The following describes a method, a base station, a user terminal and a system for dynamically adjusting TTI according to the present invention by using specific examples:
fig. 6 is a diagram illustrating a base station according to a first embodiment of the present invention. The base station may be configured to dynamically adjust the TTI. As shown in fig. 6, the base station may include a service parameter obtaining module 61, a transmission interval obtaining module 62, a configuration information sending module 63, and a scheduling information sending module 64, where:
a service parameter obtaining module 61, configured to obtain a service requirement parameter sent by the user terminal.
A transmission interval obtaining module 62, configured to query a correspondence table between the service requirement parameter and a transmission time interval TTI according to the service requirement parameter, and determine a TTI corresponding to the service requirement parameter, where the TTI is a first TTI smaller than 1ms or a second TTI equal to 1 ms.
In an embodiment of the present invention, the service requirement parameter may be a parameter such as CQI, and the service requirement parameter may represent a QoS level.
The network side establishes a bearer corresponding to the QoS class according to the service type initiated by the terminal, where the requirement for delay is included, for example, a service with CQI of 3 corresponds to a real-time game, and the requirement for delay is within 50ms, and the network schedules resources according to the requirement and a corresponding TTI, for example, TTI of 1/2 can be used, so as to meet the requirement of the real-time service for delay.
In an embodiment of the present invention, the base station may pre-establish a corresponding relationship among the delay requirement, the service requirement parameter, the service type, and the TTI. Therefore, the invention can determine the corresponding TTI according to any one of the service type, the time delay requirement and the service requirement parameter of the user terminal to perform dynamic adjustment.
A configuration information sending module 63, configured to send configuration information to the ue through a Radio Resource Control (RRC) layer signaling, where the configuration information includes TTI configuration information.
A scheduling information sending module 64, configured to send scheduling information corresponding to the configuration information to the ue through the PDCCH channel, so that the ue adjusts the TTI length and receives the scheduling information.
In an embodiment of the present invention, the base station is an LTE device described in any of the above embodiments.
In an embodiment of the present invention, as shown in fig. 4 or fig. 5, a base station may perform block processing on different services from a time domain or a frequency domain, and TTIs with different lengths collectively schedule blocks, so as to facilitate realization of a network scheduling function and centralized management.
Based on the base station provided by the above embodiment of the present invention, the bearer corresponding to the QoS class may be established for the user equipment according to the service requirement parameters, such as CQI, sent by the user equipment, where the bearer includes a requirement for time delay, and the network schedules resources according to the requirement and the corresponding TTI. The embodiment of the invention can adjust the TTI length suitable for the service to the time delay requirement according to the QoS grade of different services, and simultaneously informs the user of the TTI length information so as to meet different requirements of different services to the time delay.
Fig. 7 is a diagram illustrating a base station according to a second embodiment of the present invention. Compared with the embodiment shown in fig. 7, in the embodiment shown in fig. 6, the base station may further include a terminal capability obtaining module 65 and a terminal capability identifying module 66, where:
a terminal capability obtaining module 65, configured to obtain capability information of the user terminal.
A terminal capability identifying module 66, configured to determine whether the ue supports the first TTI according to capability information of the ue; if the user terminal does not support the first TTI, it is determined that the user terminal is a terminal that only supports the conventional TTI, and the configuration information sending module 63 is instructed to execute an operation of sending configuration information to the user terminal, where the TTI configuration information is second TTI configuration information; if the user terminal supports the first TTI, it is determined that the user terminal is a novel terminal capable of supporting a short TTI, and the service parameter obtaining module 61 is instructed to perform an operation of obtaining a service requirement parameter sent by the user terminal.
In order to support different time delays by the network, the embodiments of the present invention may allow terminals of a short TTI and a conventional TTI to coexist in the same cell (as shown in any one of fig. 3 to 5), and the terminal is scheduled by the base station as a whole, and the short TTI is only scheduled for a novel terminal, is transparent to the conventional terminal, and supports backward compatibility.
Fig. 8 is a diagram illustrating a dynamic adjustment method of a tti according to a first embodiment of the present invention. Preferably, this embodiment can be performed by the base station of any embodiment of the present invention. As shown in fig. 8, the method may include:
And 82, inquiring a corresponding relation table of the service requirement parameters and the Transmission Time Interval (TTI) according to the service requirement parameters, and determining the TTI corresponding to the service requirement parameters, wherein the TTI is a first TTI less than 1ms or a second TTI equal to 1 ms.
And step 83, sending configuration information to the user terminal through RRC layer signaling, wherein the configuration information includes TTI configuration information.
In an embodiment of the present invention, before step 81, the method may further include: acquiring capability information of a user terminal; judging whether the user terminal supports the first TTI or not according to the capability information of the user terminal; if the ue does not support the first TTI, it is determined that the ue is a terminal supporting the conventional TTI, and then step 83 of the embodiment of fig. 8 is executed, where the TTI configuration information is the second TTI configuration information; if the ue supports the first TTI, it is determined that the ue does not support the new terminal of the short TTI, and then step 81 of the embodiment of fig. 8 is executed.
Based on the base station provided by the above embodiment of the present invention, TTIs with different durations can be dynamically scheduled according to the bearer type of the service initiated by the user, so as to meet different requirements of different services on time delay. In addition, in order to implement the support of the network for different delays, the above-described embodiment of the present invention may allow terminals of a short TTI and a conventional TTI to coexist in the same cell (as shown in any one of fig. 3 to 5), and the terminal is scheduled by the base station as a whole, and the short TTI is only scheduled for a novel terminal, is transparent to the conventional terminal, and supports backward compatibility.
Fig. 9 is a schematic diagram of an embodiment of a ue of the present invention. The user terminal can be used for dynamically adjusting TTI and receiving TTI scheduling information sent by the base station. As shown in fig. 9, the ue includes a service parameter sending module 91, a configuration information receiving module 92, a transmission interval adjusting module 93, and a scheduling information receiving module 94, where:
a service parameter sending module 91, configured to send a service requirement parameter to a base station, so that the base station queries, according to the service requirement parameter, a correspondence table between the service requirement parameter and a transmission time interval TTI, and determines a TTI corresponding to the service requirement parameter, where the TTI is a first TTI smaller than 1ms or a second TTI equal to 1 ms.
A configuration information receiving module 92, configured to receive configuration information sent by the base station, where the configuration information includes TTI configuration information.
A transmission interval adjusting module 93, configured to adjust the TTI length according to the configuration information.
A scheduling information receiving module 94, configured to receive scheduling information corresponding to the configuration information sent by the base station.
In an embodiment of the present invention, the ue is an LTE device described in any of the above embodiments.
In an embodiment of the present invention, as shown in fig. 9, the user terminal may further include a terminal capability sending module 95, where:
a terminal capability sending module 95, configured to send capability information of the ue to the base station, so that the base station determines whether the ue supports the first TTI according to the capability information of the ue, and obtains the service requirement parameter sent by the service parameter sending module 91 when the ue supports the first TTI.
Based on the user terminal provided by the above embodiment of the present invention, the service requirement parameters can be sent to the base station according to different service types, so that the base station determines the bearer corresponding to the QoS class, and dynamically schedules TTIs with different durations according to different delay requirements, so as to meet different requirements of different services on delay.
Fig. 10 is a diagram illustrating a dynamic adjustment method of a tti according to a second embodiment of the present invention. Preferably, this embodiment may be executed by a user equipment capable of dynamically adjusting the TTI in any embodiment of the present invention. As shown in fig. 10, the method may include:
And 104, receiving scheduling information corresponding to the configuration information and sent by the base station.
In an embodiment of the present invention, before step 101, the method may further include: and sending the capability information of the user terminal to the base station so that the base station can judge whether the user terminal supports the first TTI according to the capability information of the user terminal, and acquiring the service requirement parameters sent by the user terminal under the condition that the user terminal supports the first TTI.
Based on the method for dynamically adjusting the transmission time interval provided by the above embodiment of the present invention, the service requirement parameters can be sent to the base station according to different service types, so that the base station determines the bearer corresponding to the QoS class, and dynamically schedules TTIs with different durations according to different delay requirements, so as to meet different requirements of different services on delay.
Fig. 11 is a diagram of an LTE system according to an embodiment of the present invention. As shown in fig. 11, the LTE system may include a user terminal 9 and a base station 6, wherein:
the base station 6 is the base station described in any of the above embodiments (for example, the embodiments of fig. 6 or fig. 7).
The base station 6 can dynamically schedule TTIs with different durations according to the bearer type of the service initiated by the user terminal 9, so as to meet different requirements of different services on time delay.
The user terminal 9 may be a user terminal as described in any of the above embodiments (for example, the embodiment of fig. 9) that can send the service requirement parameter to the base station 6 according to different service types.
The ue 9 may also be a legacy terminal that does not support the first TTI and only supports a legacy TTI.
In an embodiment of the present invention, the LTE system may be the LTE device described in any of the above embodiments.
Based on the LTE system provided by the embodiment of the invention, the TTI with smaller granularity is provided to meet the scheduling requirement of new service on short delay, the limitation of the original scheduling delay of 1ms is broken through, and the shorter scheduling period which is integral multiple of OFDM symbols is realized by redesigning the PDCCH and the PDSCH.
The embodiment of the invention can be redesigned aiming at the new service requirement with more rigorous time delay requirement, and can realize 4G of 5G new service.
The embodiment of the invention can dynamically adjust the length of the TTI according to the service bearing type, so that the TTI can be more flexibly adapted to different requirements of different service types on time delay.
In order to realize the support of the network to different time delays, the embodiment of the invention can enable the terminals of short TTI and traditional TTI to coexist in the same cell, and the terminals are scheduled by the base station in a coordinated way, and the short TTI is only scheduled to a novel terminal, is transparent to the traditional terminal and supports backward compatibility.
The functional units of the service parameter obtaining module 61, the transmission interval obtaining module 62, the configuration information sending module 63, the scheduling information sending module 64, the terminal capability obtaining module 65, the terminal capability identifying module 66, the service parameter sending module 91, the configuration information receiving module 92, the transmission interval adjusting module 93, the scheduling information receiving module 94, the terminal capability sending module 95, etc. described above may be implemented as a general processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any suitable combination thereof, for performing the functions described herein.
Thus far, the present invention has been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (6)
1. A base station is characterized by comprising a service parameter acquisition module, a transmission interval acquisition module, a configuration information sending module and a scheduling information sending module, wherein:
the service parameter acquisition module is used for acquiring at least one item of time delay requirements, service requirement parameters and service types sent by the user terminal;
a transmission interval obtaining module, configured to query a correspondence table of at least one of the delay requirement, the service requirement parameter, the service type, and a transmission time interval TTI according to at least one of the delay requirement, the service requirement parameter, and the service type, and determine a TTI corresponding to at least one of the delay requirement, the service requirement parameter, and the service type, where the TTI is a first TTI less than 1ms or a second TTI equal to 1ms, the first TTI is equal to N times of an OFDM symbol, where N is an integer greater than 0 and less than 14, and the TTI in the correspondence table includes the second TTI and a plurality of first TTIs with different durations;
a configuration information sending module, configured to send configuration information to a user equipment, where the configuration information includes TTI configuration information;
a scheduling information sending module, configured to send scheduling information corresponding to the configuration information to a user terminal, so that the user terminal adjusts the TTI length and receives the scheduling information;
wherein, the base station also comprises a terminal capability acquisition module and a terminal capability identification module, wherein:
the terminal capacity acquisition module is used for acquiring the capacity information of the user terminal;
the terminal capability identification module is used for judging whether the user terminal supports the first TTI or not according to the capability information of the user terminal; if the user terminal does not support the first TTI, indicating a configuration information sending module to execute the operation of sending the configuration information to the user terminal, wherein the TTI configuration information is second TTI configuration information; and if the user terminal supports the first TTI, indicating the service parameter acquisition module to execute the operation of acquiring at least one item of the time delay requirement, the service requirement parameter and the service type sent by the user terminal.
2. A user terminal is characterized by comprising a service parameter sending module, a configuration information receiving module, a transmission interval adjusting module and a scheduling information receiving module, wherein:
a service parameter sending module, configured to send at least one of a delay requirement, a service requirement parameter, and a service type to a base station, so that the base station queries a correspondence table of the delay requirement, the service requirement parameter, the service type, and a transmission time interval TTI according to the at least one of the delay requirement, the service requirement parameter, and the service type, and determines a TTI corresponding to the at least one of the delay requirement, the service requirement parameter, and the service type, where the TTI is a first TTI smaller than 1ms or a second TTI equal to 1ms, the first TTI is equal to N times of an orthogonal frequency division multiplexing OFDM symbol, where N is an integer greater than 0 and smaller than 14, and the TTI in the correspondence table includes the second TTI and a plurality of first TTIs with different durations;
a configuration information receiving module, configured to receive configuration information sent by a base station, where the configuration information includes TTI configuration information;
a transmission interval adjusting module, configured to adjust the TTI length according to the configuration information;
the scheduling information receiving module is used for receiving scheduling information which is sent by a base station and corresponds to the configuration information;
wherein, the user terminal further comprises a terminal capability sending module, wherein:
and the terminal capability sending module is used for sending the capability information of the user terminal to the base station so that the base station can judge whether the user terminal supports the first TTI according to the capability information of the user terminal, and the service requirement parameter sent by the service parameter sending module is obtained under the condition that the user terminal supports the first TTI.
3. A long term evolution, LTE, system comprising a user terminal and a base station according to claim 1.
4. The system according to claim 3, wherein the user terminal is the user terminal according to claim 2.
5. A method for dynamically adjusting a transmission time interval, comprising:
a base station acquires at least one of a time delay requirement, a service requirement parameter and a service type sent by a user terminal;
the base station inquires a corresponding relation table of the delay requirement, the service requirement parameter, the service type and a Transmission Time Interval (TTI) according to at least one of the delay requirement, the service requirement parameter and the service type, and determines the TTI corresponding to at least one of the delay requirement, the service requirement parameter and the service type, wherein the TTI is a first TTI less than 1ms or a second TTI equal to 1ms, the first TTI is equal to N times of an Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein N is an integer greater than 0 and less than 14, and the TTI in the corresponding relation table comprises the second TTI and a plurality of first TTIs with different durations;
a base station sends configuration information to a user terminal, wherein the configuration information comprises TTI configuration information;
the base station sends the scheduling information corresponding to the configuration information to the user terminal so that the user terminal can adjust the TTI length and receive the scheduling information;
the method for dynamically adjusting the transmission time interval further comprises the following steps:
a base station acquires the capability information of a user terminal;
the base station judges whether the user terminal supports the first TTI or not according to the capability information of the user terminal;
if the user terminal does not support the first TTI, the base station executes the step of sending the configuration information to the user terminal, wherein the TTI configuration information is second TTI configuration information;
and if the user terminal supports the first TTI, the base station executes the step of acquiring at least one of the time delay requirement, the service requirement parameter and the service type sent by the user terminal.
6. A method for dynamically adjusting a transmission time interval, comprising:
the user terminal sends the capability information of the user terminal to the base station, so that the base station judges whether the user terminal supports the first TTI according to the capability information of the user terminal, and obtains the service requirement parameter sent by the service parameter sending module under the condition that the user terminal supports the first TTI;
the method comprises the steps that a user terminal sends at least one of a delay requirement, a service requirement parameter and a service type to a base station, so that the base station inquires a corresponding relation table of the delay requirement, the service requirement parameter and the service type and a Transmission Time Interval (TTI) according to the at least one of the delay requirement, the service requirement parameter and the service type, and determines the TTI corresponding to the at least one of the delay requirement, the service requirement parameter and the service type, wherein the TTI is a first TTI less than 1ms or a second TTI equal to 1ms, the first TTI is equal to N times of an Orthogonal Frequency Division Multiplexing (OFDM) symbol, N is an integer greater than 0 and less than 14, and the TTI in the corresponding relation table comprises the second TTI and a plurality of first TTIs with different durations;
a user terminal receives configuration information sent by a base station, wherein the configuration information comprises TTI configuration information;
the user terminal adjusts the TTI length according to the configuration information;
and the user terminal receives scheduling information which is sent by the base station and corresponds to the configuration information.
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