CN106550465B - Method and device for sending and receiving resource allocation information of short transmission time interval communication - Google Patents

Method and device for sending and receiving resource allocation information of short transmission time interval communication Download PDF

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CN106550465B
CN106550465B CN201510609498.6A CN201510609498A CN106550465B CN 106550465 B CN106550465 B CN 106550465B CN 201510609498 A CN201510609498 A CN 201510609498A CN 106550465 B CN106550465 B CN 106550465B
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short tti
tti communication
information
communication
format
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CN106550465A (en
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邹伟
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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Abstract

The invention provides a method and a device for sending and receiving resource allocation information of short transmission time interval communication. The sending method comprises the following steps: a base station physical downlink control channel PDCCH informs resource allocation information for short TTI communication; wherein the resource allocation information comprises: indication information of short TTI communication and/or indication information of a short TTI communication format, and/or indication information of uplink resource of short TTI communication, and/or indication information of downlink resource of short TTI communication. The receiving method comprises the following steps: the user equipment receives resource allocation information for carrying out short TTI communication from a Physical Downlink Control Channel (PDCCH); and the user equipment carries out short TTI communication by utilizing the resource allocation information for carrying out the short TTI communication.

Description

Method and device for sending and receiving resource allocation information of short transmission time interval communication
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method and an apparatus for transmitting and receiving resource allocation information for short tti communications.
Background
The rapid development of mobile internet, internet of things, and other business applications has become a major driving force for the development of the fifth Generation mobile communication technology (5G, 5th Generation). They have an urgent need for 5G with access rates comparable to that of optical fibers, connectivity capabilities of billions of devices, a perfect real-time experience, and wireless broadband access capabilities anywhere and anytime. In addition, important indexes such as energy consumption efficiency, spectral efficiency and peak rate also need to be comprehensively considered in the design of the 5G system. China established the IMT-2020 push group in 2013 to drive the development of 5G technology. It is expected that a 5G vision, critical capacity requirements and spectrum planning will develop in 2015, according to the international global situation, after which 5G standardization work will be initiated and start to be commercially available after 2020. In terms of international standards, the technical standard of LTE-Advanced evolution of LTE (long Term evolution) is mainly formulated by the 3GPP international organization for standardization. It was initially believed that 5G-oriented standard research work will be initiated at the 3GPP R14 stage.
In future mobile networks, the traffic demand will increase continuously, and the number and types of terminals will increase explosively. As one of the important scenarios and technical means of 5G, Machine Type Communication (MTC) is receiving increasing attention. In general, there are four main requirements for machine-to-machine communication: huge number of connections, low energy consumption, low time delay, and high reliability. In terms of the number of connections, the user capacity required to be supported by a future 5G system can reach 30-300 ten thousand user equipment in each cell, and 99.99% of the area can be covered; in the aspect of energy consumption, the battery service time of the user equipment needs to be prolonged by 10 times in the 5G system compared with the current service time, and the service time is 5-10 years; in terms of delay, a 5G system needs to reduce the end-to-end delay by 5 times, which can be as small as 5ms, wherein the air interface delay can be as small as 1 ms; in terms of reliability, the reliability requirement of security-related messages is as high as 99.999%. In practical application, different applications may have different combinations of requirements according to specific situations, and the combinations may be one of the above four requirements, or different combinations of the above four requirements, or even all four requirements.
The short Transmission Time Interval access technology is to reduce the Transmission Time Interval (TTI) of the LTE system, and sufficiently shorten the processing delay and the backhaul delay to support the ultra-low delay requirement of some services. At present, there are two methods for reducing TTI, one is to reduce the duration of a single OFDM symbol by expanding the subcarrier spacing of an Orthogonal Frequency Division Multiplexing (OFDM) system; the method is discussed in both 5G high frequency communication systems and ultra dense networks. Another approach is to reduce the TTI length by reducing the number of OFDM symbols in a single TTI, as currently discussed by 3 GPP; the method has the advantages of being completely compatible with the existing LTE system and being capable of directly carrying out communication of short TTI in the traditional LTE system.
When performing communication of a short TTI, configuration information required for performing communication of the short TTI is necessary for performing communication of the short TTI, and how to transmit the configuration information required for performing communication of the short TTI is an urgent problem to be solved.
Disclosure of Invention
The invention provides a method and a device for sending and receiving resource allocation information of short transmission time interval communication, which aim to solve the technical problem of how to transmit configuration information required by short TTI communication.
In order to solve the technical problems, the invention provides the following technical scheme:
a method of transmitting resource allocation information for short transmission time interval communications, the method comprising:
and the base station informs the resource allocation information for short TTI communication by using a physical downlink control channel PDCCH.
Wherein the resource allocation information includes at least one of the following information: indication information of short TTI communication, indication information of a short TTI communication format, indication information of uplink resource of short TTI communication, and indication information of downlink resource of short TTI communication.
And the indication information of each short TTI communication format is the format number of the short TTI communication format.
The short TTI communication format is preset, wherein each format corresponds to a group of configuration information for carrying out short TTI communication.
Wherein the method further comprises:
the base station transmits parameter information included in the short TTI communication format to one or more user equipments using the short TTI communication format.
Wherein the parameter information included in the short TTI communication format is transmitted through a system broadcast message or a preset message; alternatively, the parameter information included in the short TTI communication format is agreed by a standard protocol.
Wherein the configuration information for performing short TTI communication includes at least one of:
the length of the short TTI, the length of the dedicated control channel within each short TTI, the type of the dedicated control channel within each short TTI, the location of the resources occupied by each dedicated control channel, and the modulation coding information used by each dedicated control channel for TTI communications.
Wherein the dedicated control channel comprises at least one of a downlink physical control channel PDCCH dedicated to a short TTI, a dedicated physical hybrid automatic repeat indicator channel PHICH dedicated to a short TTI, and an uplink physical control channel PUCCH dedicated to a short TTI.
The base station utilizes a Physical Downlink Control Channel (PDCCH) to inform resource allocation information for short Transmission Time Interval (TTI) communication, and the resource allocation information comprises the following components:
and the base station transmits the indication information of the short TTI communication and/or the indication information of the short TTI communication format by using the reserved option of the MCS field in the DCI information unit in the PDCCH.
The base station utilizes a Physical Downlink Control Channel (PDCCH) to inform resource allocation information for short Transmission Time Interval (TTI) communication, and the resource allocation information comprises the following components:
and the base station transmits the resource allocation information for carrying out the short TTI communication by utilizing a special downlink control information DCI unit format in a physical downlink control channel PDCCH.
Wherein the resource allocation information transmitted through the dedicated DCI unit format further includes:
indication information indicating whether the resource allocation information continues in a subsequent subframe; and/or time information for which the resource allocation information lasts.
The resource allocation information sent by the dedicated DCI unit format includes indication information of uplink resources of short TTI communication and indication information of downlink resources of short TTI communication.
Wherein the method further comprises:
and the base station carries out short TTI communication according to the resource allocation information for carrying out the short TTI communication.
A method of receiving resource allocation information for short transmission time interval communications, the method comprising:
the user equipment receives resource allocation information for carrying out short TTI communication from the PDCCH;
and the user equipment carries out short TTI communication by utilizing the resource allocation information for carrying out the short TTI communication.
The method for receiving the resource allocation information for short TTI communication from the PDCCH by the user equipment comprises the following steps:
and the user equipment acquires the resource information for carrying out short TTI communication from the special DCI unit format in the PDCCH.
The method for acquiring, by the ue, resource allocation information for performing short TTI communication from a DCI unit format dedicated to the PDCCH includes:
and the user equipment acquires the indication information of the short TTI communication and/or the indication information of the short TTI communication format in the resource information for carrying out the short TTI communication, and triggers the operation for carrying out the short TTI communication after the indication information of the short TTI communication and/or the indication information of the short TTI communication format are acquired.
Wherein, the user equipment performs short TTI communication by using the resource allocation information for performing short TTI communication, comprising:
the user equipment determines the short TTI communication format according to the indication information of the short TTI communication format in the resource allocation information for carrying out the short TTI communication;
the user equipment acquires configuration information corresponding to the short TTI communication format;
the user equipment carries out the configuration of the short TTI communication by utilizing the configuration information corresponding to the short TTI communication format;
wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message; alternatively, the parameter information included in the short TTI communication format is agreed by a standard protocol.
An apparatus for transmitting resource allocation information for short transmission time interval communications, the apparatus comprising:
and the first sending module is used for notifying the resource allocation information for short TTI communication by using a physical downlink control channel PDCCH.
Wherein the resource allocation information includes at least one of the following information: indication information of short TTI communication, indication information of a short TTI communication format, indication information of uplink resource of short TTI communication, and indication information of downlink resource of short TTI communication.
And the indication information of each short TTI communication format is the format number of the short TTI communication format.
The short TTI communication format is preset, wherein each format corresponds to a group of configuration information for carrying out short TTI communication.
Wherein the apparatus further comprises:
a second transmitting module for transmitting parameter information included in the short TTI communication format to one or more user equipments using the short TTI communication format.
Wherein the parameter information included in the short TTI communication format is transmitted through a system broadcast message or a preset message; alternatively, the parameter information included in the short TTI communication format is agreed by a standard protocol.
Wherein the configuration information for performing short TTI communication includes at least one of:
the length of the short TTI, the length of the dedicated control channel within each short TTI, the type of the dedicated control channel within each short TTI, the location of the resources occupied by each dedicated control channel, and the modulation coding information used by each dedicated control channel for TTI communications.
Wherein the dedicated control channel comprises at least one of a downlink physical control channel PDCCH dedicated to a short TTI, a physical hybrid automatic repeat indicator channel PHICH dedicated to the short TTI, and an uplink physical control channel PUCCH dedicated to the short TTI.
Wherein the first sending module is specifically configured to: and transmitting the indication information of the short TTI communication and/or the indication information of the short TTI communication format by utilizing the reserved option of the MCS field in the DCI information unit in the PDCCH.
Wherein the first sending module is specifically configured to: and transmitting the resource allocation information for short TTI communication by using a special downlink control information DCI unit format in a physical downlink control channel PDCCH.
Wherein the resource allocation information transmitted through the dedicated DCI unit format further includes:
indication information indicating whether the resource allocation information continues in a subsequent subframe; and/or time information for which the resource allocation information lasts.
The resource allocation information sent by the DCI includes indication information of uplink resources of short TTI communication and indication information of downlink resources of short TTI communication.
Wherein the apparatus further comprises:
and the first communication module is used for carrying out short TTI communication according to the resource allocation information for carrying out the short TTI communication.
An apparatus for receiving resource allocation information for short transmission time interval communications, the apparatus comprising:
a receiving module, configured to receive resource allocation information for performing short TTI communication from a PDCCH;
and the second communication module is used for carrying out short TTI communication by utilizing the resource allocation information for carrying out the short TTI communication.
Wherein the receiving module is specifically configured to:
resource information for performing short TTI communication is acquired from a DCI unit format dedicated to the PDCCH.
Wherein the receiving module is specifically configured to:
and acquiring the indication information of the short TTI communication and/or the indication information of the short TTI communication format in the resource information for carrying out the short TTI communication, and triggering the operation for carrying out the short TTI communication after the indication information of the short TTI communication and/or the indication information of the short TTI communication format are acquired.
Wherein the second communication module comprises:
a determining unit, configured to determine a short TTI communication format according to indication information of the short TTI communication format in the resource allocation information for performing short TTI communication;
an obtaining unit, configured to obtain configuration information corresponding to the short TTI communication format;
a configuration unit, configured to perform configuration of short TTI communication using configuration information corresponding to the short TTI communication format;
wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message; alternatively, the parameter information included in the short TTI communication format is agreed by a standard protocol.
According to the embodiment provided by the invention, the PDCCH informs the configuration information of the short TTI communication, so that the purpose of transmitting the resource allocation information required by the short TTI communication is realized, and a configuration basis is provided for the subsequent short TTI communication.
Drawings
FIG. 1 is a flowchart of a method for receiving resource allocation information of a short TTI provided in the present invention;
fig. 2 is a schematic diagram of a frame structure for performing short TTI communication in an LTE system according to the present invention;
fig. 3 is an interaction diagram of a format for communication using a new DCI format to indicate a short TTI provided in the present invention;
FIG. 4 is a schematic diagram illustrating an interaction of a new DCI format indicating short TTI communication according to the present invention;
FIG. 5 is an exemplary interaction diagram of indicating the format of the short TTI communication by using the reserved field of the MCS according to the present invention;
fig. 6 is an interaction diagram of indicating the format of short TTI communication by using the reserved field of MCS in PUSCH according to the present invention;
fig. 7 is an interaction diagram of indicating the format of short TTI communication by using the reserved field of MCS in PDSCH according to the present invention;
fig. 8 is a block diagram of an apparatus for receiving resource allocation information for short tti communications according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The current 3GPP discussion of short TTI access also stays in the initial technical evaluation phase, i.e. the final effect of evaluating short TTI on latency reduction is analyzed. How to introduce the short TTI technology into the existing LTE system is a considerable subject to be studied. First, in order to fully utilize the short TTI technology to reduce the access delay, the radio resources to which the short TTI technology is applied must be time-contiguous, i.e., there is a radio subchannel to which the short TTI technology is applied within each LTE subframe. Only in this way, the waiting time after the data packet arrives can be effectively reduced. Secondly, the LTE system must support a variety of services, including conventional voice services, data services, and future low-latency services. Although a fixed bandwidth may be allocated to the low latency service in the frequency domain, the amount of service data of the low latency service varies with time, and the varying channel conditions may also have a great influence on the wireless resources required by the service, so the allocation method of the fixed bandwidth may cause resource waste. Finally, the conventional LTE system makes full use of the frequency selective channel of each user using frequency selective scheduling, so that the radio resource to which the short TTI technology is applied cannot use a fixed frequency location. In summary, the radio resources for future applications of short TTI technology must be dynamically allocated.
Furthermore, since the short TTI technique reduces the granularity of allocation of resources, the resource allocation overhead must increase, and the increase in overhead and the reduction in TTI can be considered to be proportional. That is, the shorter the TTI, the smaller the latency, but the greater the additional signaling overhead due to resource allocation and related control. Therefore, under the condition of meeting the service requirement, the length of the adopted short TTI is larger and better. As the delay requirements for short TTI services vary, the system may be required to employ different short TTI lengths at different times.
When performing communication of a short TTI, configuration information required for performing communication of the short TTI is necessary for performing communication of the short TTI, and therefore, an embodiment of the present invention proposes a solution for transmitting resource allocation information required for performing communication of the short TTI, which is specifically described as follows:
the invention provides a method for sending resource allocation information of short transmission time interval communication, which comprises the following steps:
and the base station informs the resource allocation information for short TTI communication by using a physical downlink control channel PDCCH.
The method embodiment provided by the invention informs the configuration information for carrying out the short TTI communication through the PDCCH, realizes the purpose of transmitting the resource allocation information required by carrying out the short TTI communication, and provides a configuration basis for the subsequent short TTI communication.
Wherein the resource allocation information includes at least one of the following information: indication information of short TTI communication, indication information of a short TTI communication format, indication information of uplink resource of short TTI communication, and indication information of downlink resource of short TTI communication.
The indication information of the short TTI communication is used for indicating that the subsequent information is information aiming at the short TTI communication so as to effectively distinguish other types of communication;
the indication information of the short TTI communication format can be a format number corresponding to the communication format; for example, when there are at least two short TTI communication formats, a corresponding format number may be configured for each short TTI communication format, and the format number and parameter information in the communication format corresponding to the format number are broadcast.
Wherein, the short TTI communication format is preset, each format corresponds to a group of configuration information for carrying out short TTI communication
The base station transmits parameter information included in the short TTI communication format to one or more user equipments using the short TTI communication format.
Wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message; alternatively, the first and second electrodes may be,
the parameter information included in the short TTI communication format is agreed upon by a standard protocol.
When the short TTI communication format is used for sending the configuration information, the parameter information included in the short TTI communication format is sent, so that the user equipment can conveniently acquire the corresponding relation between the parameter information and the numerical value in the short TTI communication format, and the method is simple and convenient to implement.
As described in the above example, when the short TTI communication format includes the parameter a, the parameter B, and the parameter C, the communication format needs to be notified to include the parameter a, the parameter B, and the parameter C in sequence, that is, the parameter content and the parameter arrangement order, so as to facilitate the ue to determine the corresponding relationship between the parameters and the values.
Wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message.
Wherein the parameter information may be transmitted using an unused field in the system broadcast message or in a newly added field in the system broadcast message.
Wherein the configuration information for performing short TTI communication includes at least one of:
the length of the short TTI, the length of the dedicated control channel in each short TTI, the type of the dedicated control channel in each short TTI, the location of the resources occupied by each dedicated control channel, and the modulation coding information used by each dedicated control channel for TTI communication.
The dedicated Control Channel includes at least one of a Physical Downlink Control Channel (PDCCH) for a short TTI, a Physical Hybrid ARQ Indicator Channel (PHICH) for a short TTI, and a Physical Uplink Control Channel (PUCCH) for a short TTI.
The base station utilizes a Physical Downlink Control Channel (PDCCH) to inform resource allocation information for short Transmission Time Interval (TTI) communication, and the resource allocation information comprises the following components:
and the base station transmits the indication information of the short TTI communication and/or the indication information of the short TTI communication format by using the reserved option of the MCS field in the DCI information unit in the PDCCH.
And the information is transmitted by using the unused field in the existing protocol, so that the transmission resource is fully utilized, and the compatibility with the existing protocol is ensured.
The base station utilizes a Physical Downlink Control Channel (PDCCH) to inform resource allocation information for short Transmission Time Interval (TTI) communication, and the resource allocation information comprises the following steps:
and the base station transmits the resource allocation information for carrying out the short TTI communication by utilizing a special downlink control information DCI unit format in a physical downlink control channel PDCCH.
Wherein the resource allocation information transmitted through the dedicated DCI unit format further includes:
indication information indicating whether the resource allocation information continues in a subsequent subframe; and/or time information for which the resource allocation information lasts.
Wherein the time information may be represented by a time length or a number of subframes.
The resource allocation information sent by the dedicated DCI unit format includes indication information of uplink resources of short TTI communication and indication information of downlink resources of short TTI communication.
Wherein the method further comprises:
and the base station carries out short TTI communication according to the resource allocation information for carrying out the short TTI communication.
Fig. 1 is a flowchart of a method for receiving resource allocation information for short tti communications according to the present invention. The method shown in fig. 1 comprises:
step 101, the user equipment receives resource allocation information for short TTI communication from the PDCCH;
and 102, the user equipment carries out short TTI communication by utilizing the resource allocation information for carrying out the short TTI communication.
The embodiment of the method provided by the invention receives the configuration information for carrying out the short TTI communication through the PDCCH, realizes the purpose of transmitting the resource allocation information required by carrying out the short TTI communication, and provides a configuration basis for the subsequent short TTI communication.
Wherein the UE receives resource allocation information for short TTI communication from a system broadcast message, comprising:
and the user equipment acquires the resource information for carrying out short TTI communication from the special DCI unit format in the PDCCH.
The method for acquiring, by the ue, resource allocation information for performing short TTI communication from a DCI unit format dedicated to the PDCCH includes:
and the user equipment acquires the indication information of the short TTI communication and/or the indication information of the short TTI communication format in the resource information for carrying out the short TTI communication, and triggers the operation for carrying out the short TTI communication after the indication information of the short TTI communication and/or the indication information of the short TTI communication format are acquired.
Wherein, the user equipment performs short TTI communication by using the resource allocation information for performing short TTI communication, comprising:
the user equipment determines the short TTI communication format according to the indication information of the short TTI communication format in the resource allocation information for carrying out the short TTI communication;
the user equipment acquires configuration information corresponding to the short TTI communication format;
the user equipment carries out the configuration of the short TTI communication by utilizing the configuration information corresponding to the short TTI communication format;
wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message; alternatively, the parameter information included in the short TTI communication format is agreed by a standard protocol.
Fig. 2 is a schematic diagram of a frame structure for performing short TTI communication in an LTE system according to the present invention. As shown in fig. 1, the resources for short TTI communication in the uplink direction and the resources for short TTI communication in the Downlink direction are dynamically indicated by a dedicated Downlink Control information DCI unit format in a PDCCH (Physical Downlink Control Channel). A station (e.g., a base station or a network side device) can flexibly adjust the size and position of a resource block for performing short TTI communication in each subframe according to factors such as service requirements, channel conditions, and frequency selectivity of a channel in which other UEs are located. And the user terminal performs short TTI communication with the base station in a specified resource block according to the information in the DCI unit format specially used by the base station in the PDCCH.
In order to further reduce the signaling overhead of short TTI communication, a station first needs to select a suitable short TTI format according to the service requirements of all or part of or a single low-latency user in a cell, and then notifies the users of the format and radio resources used for short TTI communication. Finally, in the indicated resources, the station and the user terminal perform short TTI communication according to the indicated short TTI communication format.
Optionally, the UE (User Equipment) acquires specific parameters for performing short TTI access from DCI (downlink control information), where the parameters include the length of a short TTI, the length and configuration of a control channel in each short TTI, and the like. Optionally, in order to reduce signaling overhead, the present invention proposes to define some standard short TTI communication formats, each format corresponding to a fixed short TTI access parameter. In this way, the user terminal can determine various parameters for performing short TTI communication based on the indicated format information (e.g., format number) of the simple short TTI communication.
Alternatively, when the system supports only a single default short TTI format, the short TTI format in the DCI may be replaced by a single bit of short TTI indication information. Optionally, the short TTI format may include each control channel and a corresponding data channel within the short TTI. Optionally, the short TTI format may only include each control channel within the short TTI, and the data channel for performing short TTI communication may be further indicated by information in each control channel within the short TTI.
Fig. 3 is an interaction diagram of a format for indicating short TTI communication by using a new DCI format according to the present invention. As shown in fig. 3, the communication procedure provided in the present invention for indicating a short TTI format by using a newly defined DCI format is implemented as follows:
and step 1, the base station indicates the resources for short TTI communication by using the new DCI format.
And 2, after receiving the resource allocation indication of the new DCI format, the user terminal carries out short TTI communication according to the obtained information of the short TTI format.
Wherein the base station can indicate the format and resources of the short TTI communication using the newly defined DCI format. The DCI format may include short TTI indication information and/or short TTI format indication information; of course, the new DCI format may also include uplink resources and/or downlink resources for short TTI communication. In addition, the new DCI format may also include the defined short TTI format and the duration of the resource.
Fig. 4 is a schematic diagram of a new DCI format for indicating short TTI communication according to the present invention. As shown in fig. 4, the format contains 3 regions: short TTI format serial number, uplink resource allocation and downlink resource allocation. In the embodiment shown in fig. 4, the format number of the short TTI communication is only 2 bits, and 4 different short TTI formats may be indicated. The region may occupy a greater number of bits to indicate a greater variety of formats for short TTI communications. The new DCI format may further include the defined short TTI format and the duration of the resource. For example, when the duration is 10ms, one DCI indication is needed every 10 legacy TTIs, thereby minimizing signaling overhead.
Fig. 5 is an interaction diagram of indicating the format of short TTI communication by using the reserved field of MCS according to the present invention. As shown in fig. 5, the communication procedure using the reserved field of MCS to indicate the format of short TTI provided in the present invention is implemented as follows:
step 1, the base station indicates the resource for carrying out the short TTI communication in the PDCCH, the base station indicates the format for carrying out the short TTI communication by using the reserved field of the MCS region contained in the indication, and the resource allocation indication can be completely the same as the existing resource allocation indication;
and step 2, after receiving the resource allocation indication, the user terminal obtains the information of the short TTI format from the MCS region contained in the indication, and then carries out short TTI communication according to the short TTI format.
Fig. 6 is an interaction diagram of indicating a format of short TTI communication by using a reserved field of MCS in PUSCH according to the present invention. As shown in FIG. 6, the reserved MCS indexes 29-31 are used to indicate that the short TTI formats 1-3 are used in the uplink resource.
Fig. 7 is an embodiment of indicating a short TTI format by using a reserved field of MCS in PDSCH according to the present invention. As shown in FIG. 7, the reserved MCS indexes 29-31 are used to indicate that the short TTI formats 1-3 are used in the downlink resource.
The invention provides a device for sending resource allocation information of short transmission time interval communication, which comprises:
an apparatus for transmitting resource allocation information for short transmission time interval communications, comprising:
and the first sending module is used for notifying the resource allocation information for short TTI communication by using a physical downlink control channel PDCCH.
Wherein the resource allocation information includes at least one of the following information: indication information of short TTI communication, indication information of a short TTI communication format, indication information of uplink resource of short TTI communication, and indication information of downlink resource of short TTI communication.
And the indication information of each short TTI communication format is the format number of the short TTI communication format.
The short TTI communication format is preset, wherein each format corresponds to a group of configuration information for carrying out short TTI communication.
Wherein the apparatus further comprises:
a second transmitting module for transmitting parameter information included in the short TTI communication format to one or more user equipments using the short TTI communication format.
Wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message; alternatively, the first and second electrodes may be,
the parameter information included in the short TTI communication format is agreed upon by a standard protocol.
Wherein the configuration information for performing short TTI communication includes at least one of:
the length of the short TTI, the length of the dedicated control channel within each short TTI, the type of the dedicated control channel within each short TTI, the location of the resources occupied by each dedicated control channel, and the modulation coding information used by each dedicated control channel for TTI communications.
Wherein the dedicated control channel comprises at least one of a downlink physical control channel PDCCH dedicated to a short TTI, a physical hybrid automatic repeat indicator channel PHICH dedicated to the short TTI, and an uplink physical control channel PUCCH dedicated to the short TTI.
The first sending module is specifically configured to: and transmitting the indication information of the short TTI communication and/or the indication information of the short TTI communication format by utilizing the reserved option of the MCS field in the DCI information unit in the PDCCH.
Wherein the first sending module is specifically configured to: and transmitting the resource allocation information for short TTI communication by using a special downlink control information DCI unit format in a physical downlink control channel PDCCH.
Wherein the resource allocation information transmitted through the dedicated DCI unit format further includes:
indication information indicating whether the resource allocation information continues in a subsequent subframe; and/or time information for which the resource allocation information lasts.
The resource allocation information sent by the dedicated DCI unit format DCI includes indication information of uplink resources of short TTI communication and indication information of downlink resources of short TTI communication.
Wherein the apparatus further comprises:
and the first communication module is used for carrying out short TTI communication according to the resource allocation information for carrying out the short TTI communication.
The device embodiment provided by the invention can realize the purpose of transmitting the resource allocation information required by the short TTI communication by informing the configuration information for the short TTI communication through the PDCCH, and provides a configuration basis for the subsequent short TTI communication.
Fig. 8 is a block diagram of an apparatus for receiving resource allocation information for short tti communications according to the present invention. The apparatus of fig. 8, comprising:
a receiving module 801, configured to receive resource allocation information for performing short TTI communication from a PDCCH;
a second communication module 802, configured to perform short TTI communication by using the resource allocation information for performing short TTI communication.
The receiving module 801 is specifically configured to:
resource information for performing short TTI communication is acquired from a DCI unit format dedicated to the PDCCH.
The receiving module 801 is specifically configured to:
and acquiring the indication information of the short TTI communication and/or the indication information of the short TTI communication format in the resource information for carrying out the short TTI communication, and triggering the operation for carrying out the short TTI communication after the indication information of the short TTI communication and/or the indication information of the short TTI communication format are acquired.
Wherein the second communication module 802 comprises:
a determining unit, configured to determine a short TTI communication format according to indication information of the short TTI communication format in the resource allocation information for performing short TTI communication;
an obtaining unit, configured to obtain configuration information corresponding to the short TTI communication format;
a configuration unit, configured to perform configuration of short TTI communication using configuration information corresponding to the short TTI communication format;
wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message; alternatively, the parameter information included in the short TTI communication format is agreed by a standard protocol.
The device embodiment provided by the invention acquires the configuration information for carrying out the short TTI communication through the PDCCH, realizes the purpose of transmitting the resource allocation information required by the short TTI communication, and provides a configuration basis for carrying out the short TTI communication.
It will be understood by those of ordinary skill in the art that all or part of the steps of the above embodiments may be implemented using a computer program flow, which may be stored in a computer readable storage medium and executed on a corresponding hardware platform (e.g., system, apparatus, device, etc.), and when executed, includes one or a combination of the steps of the method embodiments.
Alternatively, all or part of the steps of the above embodiments may be implemented by using an integrated circuit, and the steps may be respectively manufactured as an integrated circuit module, or a plurality of the blocks or steps may be manufactured as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The devices/functional modules/functional units in the above embodiments may be implemented by general-purpose computing devices, and they may be centralized on a single computing device or distributed on a network formed by a plurality of computing devices.
Each device/function module/function unit in the above embodiments may be implemented in the form of a software function module and may be stored in a computer-readable storage medium when being sold or used as a separate product. The computer readable storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (24)

1. A method for transmitting resource allocation information for short transmission time interval communications, the method comprising:
a base station informs resource allocation information for short TTI communication by using a physical downlink control channel PDCCH;
the base station utilizes a Physical Downlink Control Channel (PDCCH) to inform resource allocation information for short Transmission Time Interval (TTI) communication, and the resource allocation information comprises the following steps:
the base station transmits the resource allocation information for short TTI communication by using a special downlink control information DCI unit format in a physical downlink control channel PDCCH;
the resource allocation information transmitted through the dedicated DCI unit format further includes:
indication information indicating whether the resource allocation information continues in a subsequent subframe; and/or time information for which the resource allocation information lasts;
the resource allocation information sent by the dedicated DCI unit format includes indication information of uplink resources of short TTI communication and indication information of downlink resources of short TTI communication.
2. The method of claim 1, wherein the resource allocation information comprises at least one of the following information: indication information of short TTI communication, indication information of a short TTI communication format, indication information of uplink resource of short TTI communication, and indication information of downlink resource of short TTI communication.
3. The method of claim 2, wherein the indication information of each of the short TTI communication formats is a format number of the short TTI communication format.
4. The method of claim 3, wherein the short TTI communication formats are pre-configured, and wherein each format corresponds to a set of configuration information for short TTI communication.
5. The method of claim 4, further comprising:
the base station transmits parameter information included in the short TTI communication format to one or more user equipments using the short TTI communication format.
6. The method of claim 5,
the parameter information included in the short TTI communication format is sent through a system broadcast message or a preset message; alternatively, the first and second electrodes may be,
the parameter information included in the short TTI communication format is agreed upon by a standard protocol.
7. The method of claim 4, wherein the configuration information for short TTI communication comprises at least one of:
the length of the short TTI, the length of the dedicated control channel within each short TTI, the type of the dedicated control channel within each short TTI, the location of the resources occupied by each dedicated control channel, and the modulation coding information used by each dedicated control channel for TTI communications.
8. The method of claim 7, wherein the dedicated control channel comprises at least one of a downlink physical control channel (PDCCH) dedicated to a short TTI, a dedicated physical hybrid automatic repeat indicator channel (PHICH) for the short TTI, and an uplink physical control channel (PUCCH) dedicated to the short TTI.
9. The method of claim 1, wherein the base station uses a Physical Downlink Control Channel (PDCCH) to notify resource allocation information for short TTI communication, and the method comprises:
and the base station transmits the indication information of the short TTI communication and/or the indication information of the short TTI communication format by using the reserved option of the MCS field in the DCI information unit in the PDCCH.
10. The method of claim 1, further comprising:
and the base station carries out short TTI communication according to the resource allocation information for carrying out the short TTI communication.
11. A method of receiving resource allocation information for short transmission time interval communications, the method comprising:
the user equipment receives resource allocation information for carrying out short TTI communication from the PDCCH;
the method for receiving the resource allocation information for short TTI communication from the PDCCH by the user equipment comprises the following steps:
the user equipment acquires resource information for carrying out short TTI communication from a special DCI unit format in a PDCCH;
the user equipment acquires resource allocation information for short TTI communication from a dedicated DCI unit format in a PDCCH, and the resource allocation information comprises the following components:
the user equipment acquires the indication information of the short TTI communication and/or the indication information of the short TTI communication format in the resource information for carrying out the short TTI communication, and triggers the operation for carrying out the short TTI communication after the indication information of the short TTI communication and/or the indication information of the short TTI communication format are acquired;
and the user equipment carries out short TTI communication by utilizing the resource allocation information for carrying out the short TTI communication.
12. The method of claim 11, wherein the utilizing, by the UE, the resource allocation information for the short TTI communication comprises:
the user equipment determines the short TTI communication format according to the indication information of the short TTI communication format in the resource allocation information for carrying out the short TTI communication;
the user equipment acquires configuration information corresponding to the short TTI communication format;
the user equipment carries out the configuration of the short TTI communication by utilizing the configuration information corresponding to the short TTI communication format;
wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message; alternatively, the parameter information included in the short TTI communication format is agreed by a standard protocol.
13. An apparatus for transmitting resource allocation information for short transmission time interval communications, the apparatus comprising:
a first sending module, configured to notify resource allocation information for short TTI communication using a physical downlink control channel PDCCH;
the first sending module is specifically configured to: transmitting resource allocation information for short TTI communication by using a special downlink control information DCI unit format in a physical downlink control channel PDCCH;
the resource allocation information transmitted through the dedicated DCI unit format further includes:
indication information indicating whether the resource allocation information continues in a subsequent subframe; and/or time information for which the resource allocation information lasts;
the resource allocation information sent through the DCI simultaneously comprises indication information of uplink resources of short TTI communication and indication information of downlink resources of short TTI communication.
14. The apparatus of claim 13, wherein the resource allocation information comprises at least one of: indication information of short TTI communication, indication information of a short TTI communication format, indication information of uplink resource of short TTI communication, and indication information of downlink resource of short TTI communication.
15. The apparatus of claim 14, wherein the indication information of each of the short TTI communication formats is a format number of the short TTI communication format.
16. The apparatus of claim 15, wherein the short TTI communication formats are pre-configured, and wherein each format corresponds to a set of configuration information for short TTI communication.
17. The apparatus of claim 16, further comprising:
a second transmitting module for transmitting parameter information included in the short TTI communication format to one or more user equipments using the short TTI communication format.
18. The apparatus of claim 17,
the parameter information included in the short TTI communication format is sent through a system broadcast message or a preset message; alternatively, the first and second electrodes may be,
the parameter information included in the short TTI communication format is agreed upon by a standard protocol.
19. The apparatus of claim 16, wherein the configuration information for conducting short TTI communications comprises at least one of:
the length of the short TTI, the length of the dedicated control channel within each short TTI, the type of the dedicated control channel within each short TTI, the location of the resources occupied by each dedicated control channel, and the modulation coding information used by each dedicated control channel for TTI communications.
20. The apparatus of claim 19, wherein the dedicated control channel comprises at least one of a downlink physical control channel (PDCCH) dedicated to a short TTI, a physical hybrid automatic repeat indicator channel (PHICH) dedicated to a short TTI, and an uplink physical control channel (PUCCH) dedicated to a short TTI.
21. The apparatus of claim 13, wherein the first sending module is specifically configured to: and transmitting the indication information of the short TTI communication and/or the indication information of the short TTI communication format by utilizing the reserved option of the MCS field in the DCI information unit in the PDCCH.
22. The apparatus of claim 13, further comprising:
and the first communication module is used for carrying out short TTI communication according to the resource allocation information for carrying out the short TTI communication.
23. An apparatus for receiving resource allocation information for short transmission time interval communications, the apparatus comprising:
a receiving module, configured to receive resource allocation information for performing short TTI communication from a PDCCH;
the second communication module is used for carrying out short TTI communication by utilizing the resource allocation information for carrying out the short TTI communication;
the receiving module is specifically configured to:
acquiring resource information for carrying out short TTI communication from a special DCI unit format in a PDCCH;
the receiving module is specifically configured to:
and acquiring the indication information of the short TTI communication and/or the indication information of the short TTI communication format in the resource information for carrying out the short TTI communication, and triggering the operation for carrying out the short TTI communication after the indication information of the short TTI communication and/or the indication information of the short TTI communication format are acquired.
24. The apparatus of claim 23, wherein the second communication module comprises:
a determining unit, configured to determine a short TTI communication format according to indication information of the short TTI communication format in the resource allocation information for performing short TTI communication;
an obtaining unit, configured to obtain configuration information corresponding to the short TTI communication format;
a configuration unit, configured to perform configuration of short TTI communication using configuration information corresponding to the short TTI communication format;
wherein, the parameter information included in the short TTI communication format is sent by a system broadcast message or a preset message; alternatively, the parameter information included in the short TTI communication format is agreed by a standard protocol.
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