WO2015109845A1 - 重复信息发送、接收方法及基站和用户设备 - Google Patents
重复信息发送、接收方法及基站和用户设备 Download PDFInfo
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- WO2015109845A1 WO2015109845A1 PCT/CN2014/085161 CN2014085161W WO2015109845A1 WO 2015109845 A1 WO2015109845 A1 WO 2015109845A1 CN 2014085161 W CN2014085161 W CN 2014085161W WO 2015109845 A1 WO2015109845 A1 WO 2015109845A1
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- layer signaling
- repetition level
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- H—ELECTRICITY
- 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
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- 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
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/189—Transmission or retransmission of more than one copy of a message
Definitions
- the present invention relates to the field of communications, and in particular to a method for transmitting repeated information, receiving repeated information, and a base station and a user equipment.
- MTC Machine Type Communication
- UE User Equipment
- M2M Machine to Machine
- the MTC application terminal there is a type of terminal that has a significant drop in coverage performance due to its location or its own characteristics.
- smart meter reading MTC terminals are mostly installed in a low coverage performance environment such as a basement. They mainly send packet data, have low data rate requirements, and can tolerate large data transmission delays.
- the physical downlink traffic channel Physical Downlink Share Channel, also referred to as PDSCH, also referred to as physical downlink shared channel
- physical uplink traffic channel Physical Uplink Share Channel, PUSCH for short
- the physical uplink service channel, the physical downlink control channel (PDCCH), and the physical uplink control channel (PDCCH) can improve the coverage performance by repeatedly transmitting the same information.
- FIG. 1 is a schematic diagram showing a time-frequency domain structure of a control channel in one subframe of an LTE system in the related art, and FIG. 1 shows locations of a physical downlink control channel and a physical downlink traffic channel in a subframe.
- the embodiment of the invention provides a method for transmitting repeated information, repeating information, and a base station and a user equipment, so as to at least solve the problem of insufficient resource waste or insufficient repetition caused by transmitting a corresponding channel by using a fixed number of repeated transmissions in the related art.
- a method for transmitting a repeated information includes: transmitting, by a base station, physical layer signaling or higher layer signaling indicating repeated information to a user equipment, where the repeated information is used to adjust channel transmission
- the repetition information includes at least one of the following: a repetition level, a repetition number, and an coverage level.
- the user equipment comprises: a machine type communication device.
- the channel includes at least one of the following: a downlink control channel, an uplink control channel, a downlink traffic channel, and an uplink traffic channel.
- the physical layer signaling includes one of the following: a bit field in the enhanced downlink control information, and a newly added downlink control.
- the bit field in the information, the signaling that is multiplexed and transmitted by the multiplex transmission technology and the downlink control information is included in the base station.
- the starting subframe for sending the physical layer signaling includes one of the following: a predetermined subframe, and a child corresponding to the current repetition level.
- the base station sends the physical layer signaling or the high layer signaling by sending or sending multiple groups of repeated transmissions within a predetermined time window.
- the base station sends the physical layer signaling or the high layer signaling multiple times, the base station sends the physical layer signaling or the high layer signaling in a predetermined sending period.
- the method further includes: the base station receiving, by the user equipment, the physical layer signaling or Feedback of the high layer signaling.
- one of the physical layer signaling or the high layer signaling is used to adjust a number of transmissions of one channel or a group of channels in the channel, where the set of channels includes at least two of the channels.
- the combination of channels is used to adjust a number of transmissions of one channel or a group of channels in the channel, where the set of channels includes at least two of the channels.
- the repetition information is effective after the base station sends the physical layer signaling or the high layer signaling, or the repeated information is sent by the physical layer signaling or the high layer signaling.
- the repeated information is valid from the next transmission period in which the physical layer signaling or the high layer signaling is sent, or the base station receives the physical layer information from the user equipment.
- the feedback information of the high-level signaling or the high-level signaling is effective.
- the repetition information is further configured to: adjust all or a part of the subframe set if the number of transmissions of the downlink control channel is kept unchanged.
- the base station sends the repeated information to the user equipment only when the current repetition level is adjusted to a smaller repetition level, where the smaller repetition level corresponds to the number of transmissions being smaller than the The number of transmissions corresponding to the current repeat level.
- adjusting the number of transmissions of the channel comprises: adjusting the number of transmissions of the channel on a partial subframe set for transmitting the channel.
- adjusting the number of transmissions of the channel further includes determining, by using at least one of the following, a partial subframe set The channel transmission is stable: receiving data through the channel on the partial subframe set, receiving acknowledgement information indicating that the terminal response is stable, and adjusting the channel on the partial subframe set. Resetting the number of transmissions after the number of transmissions; adjusting the number of transmissions of the channel on all or part of other subframe sets, wherein the other subframes include: not adjusting the all subframe sets of the transmission channel The set of subframes for the number of transmissions.
- the method further includes: determining, by the base station And sending, by the base station, a repetition level used by the physical layer signaling or the high layer signaling, where the base station sends the physical layer signaling or the high layer signaling to the user equipment by using a determined repetition level.
- the base station determines that the repetition level used by the physical layer signaling or the high layer signaling includes at least one of: the base station determines that a current repetition level is to send the physical layer signaling or a repetition level used by the higher layer signaling; the base station determines a maximum repetition level as a repetition level used to transmit the physical layer signaling or the higher layer signaling; adjusting the current repetition level to a smaller repetition level in the case of, Determining, by the base station, that the current repetition level is a repetition level used by the physical layer signaling or the high layer signaling; and in a case of adjusting the current repetition level to a larger repetition level, the base station Determining that the maximum repetition level is a repetition level used for transmitting the physical layer signaling or the high layer signaling; wherein the maximum repetition level is determined according to a configured maximum coverage level; the smaller repetition level The number of transmissions corresponding to the current repetition level, the larger repetition level, and the maximum repetition level respectively increases in a trend.
- a method for receiving repeated information including: receiving, by a user equipment, physical layer signaling or higher layer signaling indicating repeated information, where the repeated information is used to adjust transmission of a channel
- the number of times, the repetition information includes at least one of the following: a repetition level, a repetition number, and an coverage level.
- a base station including: a transceiver station, configured to send physical layer signaling or higher layer signaling indicating repeated information to a user equipment, where the repeated information is used for Adjusting the number of transmissions of the channel, the repeated information includes at least one of the following: a repetition level, a repetition number, and an coverage level.
- a user equipment including: a receiver, configured to receive physical layer signaling or higher layer signaling indicating repeated information, where the repeated information is used to adjust a channel
- the number of transmissions, the repeated information includes at least one of the following: a repetition level, a repetition number, and an coverage level.
- the base station sends physical layer signaling or high layer signaling indicating the repeated information to the user equipment, where the repeated information is used to adjust the number of transmissions of the channel, and the repeated information includes at least one of the following: repetition level, repetition The number of times and the coverage level solve the problem of waste of resources or insufficient number of repetitions caused by the transmission of the corresponding channel by a fixed number of repeated transmissions, thereby avoiding waste of resources and improving the coverage performance of the user equipment.
- FIG. 1 is a schematic diagram showing a time-frequency domain structure of a control channel in one subframe of an LTE system in the related art
- FIG. 2a is a first schematic flowchart 1 of a method for transmitting repeated information according to an embodiment of the present invention
- 2b is a second schematic flowchart of a method for transmitting a repeated information according to an embodiment of the present invention
- FIG. 3 is a schematic flow chart of a method for receiving repeated information according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of a preferred structure of a base station according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a preferred structure of a user equipment according to an embodiment of the present invention.
- FIG. 6 is a flow chart showing a method of adjusting a repetition level according to the preferred embodiment
- FIG. 7 is a schematic flowchart diagram of a method for adjusting repetition information of a downlink control channel according to the preferred embodiment.
- This embodiment provides a method for sending repeated information, and the process includes the following steps:
- step S202 the base station sends physical layer signaling or high layer signaling indicating the repeated information to the user equipment, where the repeated information is used to adjust the number of transmissions of the channel, and the repeated information includes at least one of the following: repetition level, repetition number, coverage grade.
- the base station sends the repeated information to the user equipment by using the physical layer signaling or the high layer signaling, so that the user equipment and the base station can adjust the transmission times of the channel according to the repetition level, the repetition number, and the coverage level included in the repeated information, thereby
- the problem of waste of resources or insufficient repetition caused by transmitting the corresponding channel by using a fixed number of repeated transmissions can be solved, thereby avoiding waste of resources and improving coverage performance of the user equipment.
- the foregoing repeated information is determined by the base station according to the coverage performance of the user equipment, where the coverage level is used to indicate the coverage performance of the base station.
- different repetition levels and/or repetition times and/or coverage levels have a corresponding correspondence with the number of transmissions, so that the user equipment can be based on the repetition level, the number of repetitions, and the coverage level in the repeated information.
- At least one information determines the number of transmissions of the corresponding channel.
- the user equipment comprises: a machine type communication device or other user equipment that can support channel repeat transmission.
- the channel that can be adjusted includes at least one of the following: a downlink control channel, an uplink control channel, a downlink traffic channel, and an uplink traffic channel.
- the channel that can be adjusted between the base station and the user equipment is a downlink control channel and an uplink control channel, and is sent by the base station to the user equipment.
- the repetition information including the repetition level and/or the repetition number and/or the coverage level, thereby adjusting the number of transmissions of the downlink control channel and the uplink control channel; or, in physical layer signaling or higher layer signaling, carrying the channel to be adjusted
- the physical layer signaling or the high-layer signaling may further carry identifiers of multiple channels and repetition levels and/or repetition times and/or coverage levels corresponding to each identifier, so as to perform different transmission times on multiple channels respectively. Adjustment.
- one physical layer signaling or higher layer signaling may adjust the number of transmissions of one channel or a group of channels, for example, one physical layer signaling or higher layer signaling adjusts a downlink control channel, an uplink control channel, and a downlink traffic channel.
- the number of transmissions of one channel in the uplink traffic channel may respectively combine the combination of at least two channels of the downlink control channel, the uplink control channel, the downlink traffic channel, and the uplink traffic channel Adjusting, wherein the combination of at least two channels comprises: a downlink control channel and an uplink control channel; a downlink control channel and an uplink traffic channel; a downlink control channel and a downlink traffic channel; an uplink control channel and a downlink traffic channel; an uplink control channel and an uplink service Channel; downlink traffic channel and uplink traffic channel; uplink control channel, downlink traffic channel and uplink traffic channel; downlink control channel, downlink traffic channel and uplink traffic channel; downlink control channel, uplink control channel and uplink traffic channel; downlink control channel, Uplink control Channel and a downlink traffic channel; downlink channel, an uplink control channel, downlink traffic channel and uplink traffic channel.
- the physical layer signaling may be one of the following: a bit field in the enhanced downlink control information, a bit field in the newly added downlink control information, and a multiplexing control information and a downlink control information.
- the bit field in the enhanced downlink control information includes a bit field in the format of the Downlink Cotrol Information (DCI) format, and the bit field in the newly added downlink control information includes the new DCI format.
- DCI Downlink Cotrol Information
- the bit field in the existing DCI format includes at least one of the following: adding a new bit field and reinterpreting the existing bit field.
- the starting subframe for transmitting the physical layer signaling includes: a predefined value, a subframe determined according to a current repetition level, and determined according to different repetition levels.
- the subframe, that is, the starting subframe for transmitting the physical layer signaling includes one of the following: a predetermined subframe, a subframe corresponding to the current repetition level, and a subframe corresponding to the repetition level to be adjusted.
- the subframe corresponding to the current repetition level includes: the same starting subframe as the control channel of the current repetition level.
- the subframe corresponding to the repetition level to be adjusted includes: the same starting subframe as the control channel of the repetition level to be adjusted.
- the sending times of the physical layer signaling or the high layer signaling by the base station by using the physical layer signaling include: sending once, or multiple sets of repeated transmissions within a predetermined time window, for example, including k in the time window M N repeated transmissions, where M, k, and N are positive integers.
- the base station sends the physical layer signaling or the high layer signaling to the user equipment multiple times, the base station sends multiple physical layer signaling or high layer signaling in a predetermined sending period.
- FIG. 2 is a first schematic flowchart of a method for transmitting a repeated information according to an embodiment of the present invention. As shown in FIG. 2a, optionally, in the case that ACK/NACK feedback is performed after the user equipment receives the physical layer signaling, After S202, the process further includes:
- Step S204 The base station receives feedback from the user equipment on physical layer signaling or higher layer signaling, such as ACK/NACK feedback.
- the repeated information may be effective immediately after the base station sends the physical layer signaling or the high layer signaling, or the repeated information is sent by the physical layer signaling or the high layer signaling and passes through a predetermined time window (for example, the time window M described above).
- a predetermined time window for example, the time window M described above.
- the base station receives feedback from the user equipment on physical layer signaling or higher layer signaling.
- the information (such as the ACK/NACK feedback described above) comes into effect.
- the base station and the user equipment respectively adjust the corresponding transmission times of the corresponding channels indicated in the repeated information.
- the repeated information used to adjust the downlink control channel may further carry information related to aggregation level, and the repeated information may also be used to: maintain downlink control Adjusting the aggregation level of the downlink control channel on all or part of the subframe set when the number of transmissions of the channel is unchanged; or adjusting the number of transmissions of the downlink control channel of a specific aggregation level on all or part of the subframe set, where The aggregation level includes one or more aggregation levels.
- the base station sends the repeated information to the user equipment only when the current repetition level is adjusted to a smaller repetition level, where the smaller repetition level corresponds to the number of transmissions corresponding to the number of transmissions corresponding to the current repetition level.
- adjusting the number of transmissions of the channel includes: adjusting a number of transmissions of the channel on the partial subframe set for the transmission channel.
- the unadjusted subframe set may be adjusted to be adjusted to a repetition level adjusted with the partial subframe set. For example, after adjusting the number of transmissions of the channel on the partial subframe set, determining channel transmission stability on the partial subframe set by at least one of the following: receiving data through the channel on the partial subframe set, and receiving the peer response Representing the transmission stability confirmation information, after adjusting the number of transmissions of the channel on the partial subframe set, reaching a predetermined interval time; adjusting the number of transmissions of the channel on all or part of other subframe sets, wherein the other subframes include: all of the transmission channels A collection of subframes in the subframe set that have not been adjusted for the number of transmissions.
- FIG. 2b is a second schematic flowchart of a method for transmitting a repeated information according to an embodiment of the present invention.
- the process further includes the following steps. :
- step S200 the base station determines a repetition level used for transmitting physical layer signaling or higher layer signaling.
- step S202 the base station sends physical layer signaling or higher layer signaling to the user equipment by using the determined repetition level.
- adjusting the repetition level used in signaling transmission may include at least one of: transmitting adjustment signaling at a current repetition level, and transmitting adjustment signaling at a maximum repetition level; wherein, from a large repetition level to a small repetition level In the adjustment, it is preferred to transmit the adjustment signaling at the current repetition level, and to transmit the adjustment signaling at the maximum repetition level when the small repetition level is adjusted to a large repetition level.
- the maximum repetition level may be the maximum coverage level configured by the base station, or the maximum coverage level configured by the system by default.
- the base station determines that the repetition level used for transmitting physical layer signaling or higher layer signaling includes at least one of the following: the base station determines that the currently used repetition level is a repetition used for transmitting physical layer signaling or higher layer signaling. Level; the base station determines that the maximum repetition level is a repetition level used for transmitting physical layer signaling or higher layer signaling; in the case of adjusting the currently used repetition level to a smaller repetition level, the base station determines that the currently used repetition level is a transmission.
- the repetition level is determined according to the configured maximum coverage level; the number of transmissions corresponding to the smaller repetition level, the current repetition level, the larger repetition level, and the maximum repetition level respectively increases.
- the embodiment further provides a method for receiving the repeated information.
- the process of the method for receiving the repeated information includes: receiving, by the user equipment, physical layer signaling or high layer signaling indicating repeated information, where the repeated information is used to adjust the number of transmissions of the channel,
- the repeated information includes at least one of the following: a repetition level, a repetition number, and an coverage level.
- the user equipment is a machine type communication device.
- the channel includes at least one of the following: a downlink control channel, an uplink control channel, a downlink traffic channel, and an uplink traffic channel.
- the physical layer signaling includes one of the following: a bit field in the enhanced downlink control information, a bit field in the added downlink control information, and signaling that is multiplexed and transmitted by using the multiplexing transmission technology and the downlink control information.
- the user equipment receives physical layer signaling by blind detection.
- FIG. 3 is a schematic flowchart of a method for receiving a repeated information according to an embodiment of the present invention.
- the process includes the following steps:
- Step S302 The user equipment receives the physical layer signaling or the high layer signaling indicating the repeated information, where the repeated information is used to adjust the number of transmissions of the channel, and the repeated information includes at least one of the following: a repetition level, a repetition number, and an coverage level;
- Step S304 the user equipment sends feedback to the base station for physical layer signaling or higher layer signaling.
- one physical layer signaling or higher layer signaling is used to adjust the number of transmissions of one channel or a group of channels in the channel, where the group of channels includes a combination of at least two channels in the channel.
- the repeated information takes effect after the base station sends the physical layer signaling or the high layer signaling, or the repeated information takes effect after the physical layer signaling or the high layer signaling is sent and passes the predetermined time window, or the repeated information is sent from the physical The next transmission period of the layer signaling or the high layer signaling takes effect, or the base station comes into effect after receiving the feedback information of the user equipment to the physical layer signaling or the high layer signaling.
- the repeated information is further used to: adjust the downlink control on all or part of the subframe set while maintaining the number of transmission times of the downlink control channel unchanged.
- adjusting the number of transmissions of the channel includes: adjusting a number of transmissions of the channel on the partial subframe set used for the transmission channel.
- adjusting the number of transmissions of the channel further includes determining, by using at least one of the following, channel transmission stability on the partial subframe set: by using the partial subframe set
- the channel receives the data, receives the acknowledgment information indicating that the transmission is stable, and reaches a predetermined interval after adjusting the number of transmissions of the channel on the partial subframe set; and adjusts the channel on all or part of other subframe sets.
- the number of transmissions, wherein the other subframes include: a set of subframes of the total number of transmissions in the entire subframe set of the transport channel.
- the embodiment further provides a base station, and the base station is configured to implement the foregoing method for transmitting the repeated information.
- the specific implementation process of the device in the embodiment of the device has been described in detail in the method embodiment, and details are not described herein again.
- the base station includes: a transceiver station, configured to send physical layer signaling or high layer signaling indicating repeated information to the user equipment, where the repeated information is used to adjust the number of transmissions of the channel, and the repeated information includes at least one of the following: a repetition level, Number of repetitions, coverage level.
- the transceiver station is further configured to receive feedback from the user equipment on physical layer signaling or higher layer signaling.
- FIG. 4 is a schematic diagram of a preferred structure of a base station according to an embodiment of the present invention.
- the base station further includes a processor 44 coupled to the transceiver station 42 and configured to determine to send physical layer signaling or a higher layer. The level of repetition used by the signaling.
- the embodiment further provides a user equipment, and the base station is used to implement the method for receiving the repeated information.
- the specific implementation process of the device in the device embodiment has been described in detail in the method embodiment, and details are not described herein.
- the user equipment includes: a receiver configured to receive physical layer signaling or higher layer signaling indicating repeated information, where the repeated information is used to adjust the number of transmissions of the channel, and the repeated information includes at least one of the following: a repetition level, a repetition number, Coverage level.
- FIG. 5 is a schematic diagram of a preferred structure of a user equipment according to an embodiment of the present invention.
- the user equipment further includes: a transmitter 54 coupled to the receiver 52, configured to send signaling to the physical layer. Or feedback of higher layer signaling to the base station.
- the preferred embodiment provides a method for adjusting the repetition level, which can be applied to an LTE/LTE-A system.
- FIG. 6 is a schematic flowchart of a method for adjusting a repetition level according to the preferred embodiment.
- the method for adjusting a repetition level according to the preferred embodiment includes: in a coverage enhancement scenario, a base station passes physical layer signaling or The high layer signaling adjusts the repetition information of the channel, where the channel includes at least one of the following: a downlink control channel, an uplink control channel, a downlink traffic channel, and an uplink traffic channel.
- the repeated information includes at least one of the following: a repetition level, a repetition number, and an coverage level.
- the number of repetitions can be adjusted in a real-time manner in a coverage enhancement scenario.
- the physical layer signaling includes: multiplexing the bit field in the existing DCI format or using the bit field in the new DCI format or multiplexing with the DCI; the bit field in the existing DCI format includes the following: At least one: add a new bit field and reinterpret the existing bit field.
- the channel adjusted by the base station may be a single channel, and the repetition level of the control channel is as follows: or multiple channels may be adjusted together, such as a control channel and an uplink control channel.
- the dedicated format is adjusted, that is, the signaling for indicating the repeated information includes an indication field of at least one of the following: an coverage level indication field, a repetition level indication field, and a repetition number indication field.
- the foregoing physical layer signaling multiplexing the transmission with the DCI includes at least: transmitting the adjustment signaling together with the existing DCI by using a layered modulation technique.
- 2 bits can indicate up to 4 repetition levels, as shown in Table 1 and Table 2; 3bit can indicate a maximum of 8 repetition levels, as shown in Table 3; 4bit Indicates the coverage level and the number of repetitions, indicating signaling high and status indications, as shown in Table 4.
- Table 1 2bit indicates 3 coverage levels/repetition levels/number of times
- the value of a certain coverage level in the table may indicate the maximum supported value of the repetition level corresponding to the index.
- the index 0 corresponds to the coverage level range (0, 5 dB)
- the index 1 corresponds to the coverage level range.
- index 2 corresponds to the coverage level range (10dB, 15dB).
- Table 2 2bit indicates 4 coverage levels/repetition levels/number of times
- Table 3 3bit indication coverage level / repetition level / number of times
- Table 4 The high and low bits of the 4bit signaling indicate the coverage level and the number of repetitions, respectively.
- the coverage level may be in decibels (dB) as a unit, and the repetition level has a certain correspondence with the number of repetitions. For example, the higher the repetition level (or coverage level), the corresponding repetition number may be unchanged or higher; or the same A coverage level can correspond to different repetition times depending on the level of repetition.
- dB decibels
- the “index” may be used to identify different coverage levels, or different repetition levels, or different repetition times; optionally, an index is used to identify the coverage level and the repetition level. And a set of correspondences formed by at least two of the repetition times.
- FIG. 7 is a schematic flowchart of a method for adjusting repetition information of a downlink control channel according to the preferred embodiment.
- adjusting the number of repeated transmissions includes: adjusting The aggregation level used when repeating the transmission, the number of repetitions of adjusting the partial aggregation level, the number of repetitions of the aggregation level or the aggregation level on the partial subframe set.
- adjusting the repetition level of the downlink control channel further includes:
- Adjust the aggregation level used in the repeated transmission that is, change the aggregation level used while changing the number of repetitions, such as the aggregation level (AL) 4 becomes AL8 and the number of repetitions is unchanged;
- Adjusting the number of repetitions of a partial aggregation level where part refers to k aggregation levels, and k belongs to one or more of the sets ⁇ 1, 2, 4, 8, 16, 32 ⁇ , such as only adjusting the number of repetitions of AL8;
- Adjusting the number of repetitions of the aggregation level or partial aggregation level on a partial subframe set that is, adjusting the subframe set using repeated transmission, where part refers to m subframe sets, and m belongs to the set ⁇ 1, 2, 3, 4, .
- One or more of .., M ⁇ , M is a positive integer greater than zero. For example, for a subframe corresponding to an SFN value of 10-20, that is, a subframe set 1, the aggregation level of the subframe set or the number of repetitions of the partial aggregation level is adjusted.
- adjusting the repetition level of the channel further includes: adjusting the number of repetitions of the channel on the partial subframe set; where the partial subframe set is the same as the above.
- the unadjusted subframe set is stabilized and adjusted to a repetition level adjusted with the partial subframe set.
- stabilization refers to receiving data, or receiving confirmation information, or an interval of X milliseconds, where X is a positive integer, and its value can be flexibly set according to the needs of the system.
- the number of repetitions of the channel on the partial subframe set is adjusted, such as the first subframe set, and the remaining subframe sets are still repeatedly transmitted according to the current repetition level.
- the number of repetitions of the channel on the partial subframe set is adjusted, such as the first subframe set, and the remaining subframe sets are still repeatedly transmitted according to the current repetition level.
- the remaining subframe sets are also adjusted to the same repetition level as the first subframe set.
- adjusting the repetition level used in signaling transmission includes at least one of: transmitting adjustment signaling at a current repetition level, and transmitting adjustment signaling at a maximum repetition level.
- priority is given to transmitting adjustment signaling at a current repetition level, and from a small repetition level to a large repetition level adjustment, priority is given to transmitting adjustment signaling at a maximum repetition level;
- the maximum repetition level may be the maximum coverage level configured by the base station, or the maximum coverage level configured by default;
- the adjustment signaling is only supported from a larger repetition level to a smaller repetition level adjustment.
- the sending start subframe of the physical layer signaling includes: a predefined value, determined according to a current repetition level, and determined according to different repetition levels.
- the physical layer signaling that sends the adjusted repetition level uses the same starting subframe as the control channel of the current coverage level.
- the initial subframe is determined to correspond to the repetition level to be adjusted.
- the number of times the physical layer signaling is sent includes: sending only once, and including k times of repeated transmissions in the time window M.
- the window length M in the k pieces of N repeated transmissions in the time window M is a value greater than or equal to k ⁇ M.
- the physical layer signaling is sent in a period C, where C is a positive integer, and the value can be flexibly set according to the requirements of the system.
- the terminal receives ACK/NACK feedback after the physical layer signaling.
- the effective time of the physical layer signaling includes: immediately after the completion of the signaling, the time window M takes effect, the next cycle C takes effect, and the feedback takes effect after receiving the feedback.
- the signaling when the adjustment signaling is sent only once, the signaling is effective immediately after the completion of the signaling, including the next subframe or the next radio frame; for the adjustment, the window length M (including k times of N repeated transmissions)
- the window length M when the adjustment is made, it can be valid in the next time window M; for the adjustment in the period C, it can be effective in the next period; when there is feedback information, it can be effective after receiving the feedback information.
- adjusting the repetition level of the channel includes: adjusting one channel by using one physical layer signaling or higher layer signaling, adjusting a combination of channels by using one physical layer signaling or higher layer signaling, where the combination manner includes but is not limited to at least one of the following Ways: ⁇ downlink control channel and uplink control channel ⁇ , ⁇ downlink traffic channel and uplink traffic channel ⁇ , ⁇ downlink control channel and downlink traffic channel and uplink traffic channel ⁇ , ⁇ downlink control channel and uplink control channel and downlink traffic channel and A combination of at least two channels, such as an uplink traffic channel ⁇ .
- the terminal determines, according to the measurement, whether the repetition level needs to be adjusted, and if the adjustment is needed, triggers the access process.
- the terminal when the terminal detects the downlink control channel carrying the adjustment signaling, one is detected by the repetition level, and the other is detected by the current repetition level and the maximum repetition level.
- the base station adjusts the repetition level/number of times or the coverage level of the downlink control channel through physical layer signaling.
- the physical layer signaling adds a new bit field to the existing DCI format to implement indication adjustment; the new bit field includes a repetition level indication field or a repetition number indication field.
- the new bit field includes a repetition level indication field or a repetition number indication field.
- two repetition levels can be indicated by 2 bits, as shown in Table 5.
- Table 5 2bit indicates 3 coverage levels/repetition levels/number of times
- the transmission start subframe of the physical layer signaling is determined according to the current repetition level.
- the physical layer signaling that transmits the adjusted repetition level uses the same starting subframe as the control channel of the current coverage level.
- the physical layer signaling is sent using the current repeat level and is sent only once.
- the effective time of the physical layer signaling is effective immediately after the signaling is completed.
- the base station adjusts the downlink traffic channel by using high-layer signaling, such as Radio Resource Control (RRC) signaling (including System Information Block (SIB) message). Repeat level/number or coverage level.
- RRC Radio Resource Control
- SIB System Information Block
- the bit field used by the RRC signaling includes a repetition level indication field or a repetition number indication field.
- 2 repetition levels can be indicated by 2 bits, as shown in Table 6.
- Table 6 2bit indicates 4 coverage levels/repetition levels/number of times
- the RRC signaling is sent using the current repetition level and sent only once.
- the effective time of the RRC signaling is valid after receiving the feedback information and being correct.
- the repeatedly transmitted traffic channel can be adjusted in time and the correctness of the adjustment is ensured when the coverage requirement changes.
- the base station adjusts the repetition level/number of times or the coverage level of the uplink control channel through physical layer signaling.
- the physical layer signaling adds a new bit field to the existing DCI format to implement indication adjustment; the new bit field includes a repetition level indication field or a repetition number indication field.
- the new bit field includes a repetition level indication field or a repetition number indication field.
- two repetition levels can be indicated by 2 bits, as shown in Table 7.
- Table 7 2bit indicates 3 coverage levels/repetition levels/number of times
- the transmission start subframe of the physical layer signaling is determined according to a predefined value.
- the effective time of the physical layer signaling is valid in the next time window M when the window length M (containing k times of repeated transmissions) is adjusted.
- the repeatedly transmitted control channel can be adjusted in time when the coverage requirement changes and the correctness of the adjustment is ensured by multiple transmissions.
- the base station adjusts the repetition level/number of times or the coverage level of the downlink control channel through physical layer signaling.
- the physical layer signaling adds a new bit field to the existing DCI format to implement indication adjustment; the new bit field includes a repetition level indication field or a repetition number indication field.
- the high-level and low-order bits of the 4-bit signaling may be used to indicate the coverage level and the number of repetitions, respectively, as shown in Table 8, where the upper 2 bits of the index indicate the coverage level, and the lower 2 bits indicate the number of repetitions.
- Table 8 The high and low bits of the 4bit signaling indicate the coverage level and the number of repetitions, respectively.
- the transmission start subframe of the physical layer signaling is determined according to a predefined value.
- the physical layer signaling is transmitted in cycle C while transmitting at the maximum repetition level.
- the effective time of the physical layer signaling is valid for the next cycle when the cycle C is adjusted.
- the repeatedly transmitted control channel can be adjusted in time when the coverage requirement changes and can be calibrated through each cycle.
- the base station adjusts the repetition level/number of times or the coverage level of the downlink control channel through physical layer signaling.
- the physical layer signaling is implicitly transmitted together with the DCI to implement the indication adjustment, for example, using the layered modulation technique to transmit the adjustment signaling together with the existing DCI.
- the physical layer signaling includes a repetition level indication field or a repetition number indication field. In physical layer signaling, two repetition levels can be indicated by 2 bits, as shown in Table 9.
- Table 9 2bit indicates 3 coverage levels/repetition levels/number of times
- the transmission start subframe of the physical layer signaling is determined according to different repetition levels.
- the physical layer signaling that transmits the adjustment repetition level uses the same starting subframe as the control channel to which the repetition level is to be adjusted. For example, corresponding to the repetition level to be adjusted, a possible correspondence is: assuming that the repetition number of the downlink control channel is N i when the repetition level L i is repeated, the start of the physical layer signaling for adjusting the repetition level is sent.
- the physical layer signaling is sent using the repetition level to be adjusted and is sent only once.
- the effective time of the physical layer signaling is valid after the signaling is received and the feedback is received.
- the repeatedly transmitted control channel can be adjusted in time when the coverage requirement changes, and the terminal obtains the adjustment signaling by blindly checking the starting positions of the respective levels.
- the base station adjusts the repetition level/number of times or the coverage level of the downlink control channel through physical layer signaling.
- the physical layer signaling adds a new bit field to the existing DCI format to implement the indication adjustment; the new bit field includes an aggregation level indication field.
- 1 bit can be used to indicate two aggregation levels, as shown in Table 10.
- Table 10 1bit indicates 2 aggregation levels
- the transmission start subframe of the physical layer signaling is determined according to the current repetition level.
- the physical layer signaling that transmits the adjusted repetition level uses the same starting subframe as the control channel of the current coverage level.
- the physical layer signaling is sent using the current repeat level and is sent only once.
- the effective time of the physical layer signaling is effective immediately after the signaling is completed.
- the repeatedly transmitted control channel can be adjusted in time when the coverage requirement changes, and only the aggregation level is adjusted without changing the number of repetitions, which is suitable for the case where the coverage requirement is changed little.
- the base station adjusts the repetition level/number of times or the coverage level of the downlink control channel and the downlink traffic channel through physical layer signaling.
- the physical layer signaling adds a new bit field to the existing DCI format to implement indication adjustment; the new bit field includes a repetition level indication field or a repetition number indication field.
- the new bit field includes a repetition level indication field or a repetition number indication field.
- two repetition levels can be indicated by using 2 bits, as shown in Table 11, wherein the downlink control channel and the downlink traffic channel use the same repetition level but each uses a different repetition number.
- Table 11 2bit indicates 4 repetition levels
- the physical layer signaling is adjusted from the current repetition level 2 to the repetition level 1.
- the transmission start subframe of the physical layer signaling is determined according to the current repetition level. Transmitting the physical layer signaling of the adjustment repetition level with the current coverage level
- the control channel uses the same starting subframe.
- the physical layer signaling is sent using the current repeat level and is sent only once.
- the effective time of the physical layer signaling is effective immediately after the signaling is completed.
- the repeatedly transmitted control channel and traffic channel can be quickly and simultaneously adjusted when the coverage requirement changes.
- the base station sends physical layer signaling or high layer signaling indicating the repeated information to the user equipment, where the repeated information is used to adjust the number of transmissions of the channel, and the repeated information includes at least one of the following: repetition level, repetition The number of times and the coverage level solve the problem of waste of resources or insufficient number of repetitions caused by the transmission of the corresponding channel by a fixed number of repeated transmissions, thereby avoiding waste of resources and improving the coverage performance of the user equipment.
- modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in a storage device by a computing device, or they may be fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
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Abstract
本发明公开了一种重复信息发送、接收方法及基站和用户设备。其中,重复信息发送方法包括:基站发送指示重复信息的物理层信令或高层信令至用户设备,其中,该重复信息用于调整信道的传输次数,该重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。通过本发明,解决了采用固定的重复传输次数传输相应信道所导致的资源浪费或重复次数不足的问题,避免了资源浪费,提升了用户设备的覆盖性能。
Description
本发明涉及通信领域,具体而言,涉及一种重复信息发送、重复信息接收方法及基站和用户设备。
机器类型通信(Machine Type Communication,简称为MTC)用户终端(User Equipment,简称为UE,又称为用户设备或终端),又称为机器到机器(Machine to Machine,简称为M2M)用户通信设备,是目前物联网的主要应用形式。近年来,由于长期演进(Long-Term Evolution,简称为LTE)/高级长期演进***(Long-Term Evolution Advance,简称为LTE-Advance或LTE-A)的频谱效率高,越来越多的移动运营商选择LTE/LTE-A作为宽带无线通信***的演进方向;基于LTE/LTE-A的MTC多种类数据业务也将更具吸引力。
在MTC应用终端中,有一类终端由于所处位置或自身特性受限从而导致了覆盖性能显著下降。例如:智能抄表类MTC终端大多固定安装在地下室等低覆盖性能环境下,其主要发送小包数据,对数据速率的要求低,能够容忍较大的数据传输时延。由于此类终端对数据速率要求低,对于物理下行业务信道(Physical Downlink Share Channel,简称为PDSCH,又称为物理下行共享信道)、物理上行业务信道(Physical Uplink Share Channel,简称为PUSCH,又称为物理上行业务信道)、物理下行控制信道(Physical Downlink Control Channel,简称为PDCCH)、物理上行控制信道(Physical Uplink Control Channel,简称为PDCCH)等可以通过重复传输相同信息提升覆盖性能。图1是相关技术中LTE***的一个子帧中控制信道的时频域结构示意图,图1中示出了物理下行控制信道和物理下行业务信道在子帧中的位置。
相关技术中采用了固定的重复传输次数来传输相应的信道,以提升覆盖性能。然而,发明人在研究过程中发现:由于重复传输会带占用大量的资源,并且不同覆盖提升需求所对应的重复次数也是不同的,如果一直按照一种重复次数进行传输,在信道条件变化时,则会出现重复资源浪费或者重复次数不够的情况。
针对相关技术中采用固定的重复传输次数传输相应信道所导致的资源浪费或重复次数不足的问题,目前尚未提出有效的解决方案。
发明内容
本发明实施例提供了一种重复信息发送、重复信息接收方法及基站和用户设备,以至少解决相关技术中采用固定的重复传输次数传输相应信道所导致的资源浪费或重复次数不足的问题。
根据本发明实施例的一个方面,提供了一种重复信息发送方法,包括:基站发送指示重复信息的物理层信令或者高层信令至用户设备,其中,所述重复信息用于调整信道的传输次数,所述重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
可选地,所述用户设备包括:机器类型通信设备。
可选地,所述信道包括以下至少之一:下行控制信道、上行控制信道、下行业务信道、上行业务信道。
可选地,在所述基站通过所述物理层信令发送所述重复信息的情况下,所述物理层信令包括以下之一:增强的下行控制信息中的bit域、新增的下行控制信息中的bit域、通过复用传输技术与下行控制信息复用传输的信令。
可选地,在所述基站通过物理层信令发送所述重复信息的情况下,发送所述物理层信令的起始子帧包括以下之一:预定子帧、与当前重复等级对应的子帧、与将要调整到的重复等级对应的子帧。
可选地,所述预定子帧包括:无线帧的子帧0,或者,满足(k+10×SFN)mod C=0的子帧;其中,k=1,2,3…;SFN表示无线帧的***帧号;mod为取模运算;C为正整数,表示预定周期;所述与当前重复等级对应的子帧包括:与所述当前重复等级的控制信道相同的起始子帧;所述与将要调整到的重复等级对应的子帧包括:与所述将要调整到的重复等级的控制信道相同的起始子帧。
可选地,所述基站通过一次发送或者在预定时间窗内的多组重复发送的方式,发送所述物理层信令或者所述高层信令。
可选地,在所述基站多次发送所述物理层信令或者所述高层信令的情况下,所述基站以预定的发送周期发送所述物理层信令或者所述高层信令。
可选地,在所述基站发送所述物理层信令或者所述高层信令至所述用户设备之后,所述方法还包括:所述基站接收所述用户设备对所述物理层信令或者所述高层信令的反馈。
可选地,一个所述物理层信令或者所述高层信令用于调整所述信道中的一个信道或者一组信道的传输次数,其中,所述一组信道包括所述信道中至少两个信道的组合。
可选地,所述重复信息在所述基站发送完所述物理层信令或者所述高层信令之后开始生效,或者所述重复信息在发送所述物理层信令或者所述高层信令并经过预定时间窗后生效,或者所述重复信息从发送所述物理层信令或者所述高层信令的下一个发送周期开始生效,或者所述基站收到所述用户设备对所述物理层信令或者所述高层信令的反馈信息后开始生效。
可选地,在所述信道包括下行控制信道的情况下,所述重复信息还用于:在保持所述下行控制信道的传输次数不变的情况下,调整全部或部分子帧集合上的所述下行控制信道的聚合等级;或者,调整所述全部或部分子帧集合上特定聚合等级的所述下行控制信道的传输次数,其中,所述特定聚合等级包括一个或者多个聚合等级。
可选地,所述基站仅在将当前重复等级往较小的重复等级调整的情况下发送所述重复信息至所述用户设备,其中,所述较小的重复等级对应的传输次数小于所述当前重复等级对应的传输次数。
可选地,调整所述信道的所述传输次数包括:调整用于传输所述信道的部分子帧集合上所述信道的所述传输次数。
可选地,在调整所述部分子帧集合上所述信道的所述传输次数之后,调整所述信道的所述传输次数还包括:通过以下至少之一的方式确定所述部分子帧集合上的所述信道传输稳定:通过所述部分子帧集合上的所述信道接收到数据、收到对端响应的表示传输稳定的确认信息、在调整所述部分子帧集合上所述信道的所述传输次数之后达到预定间隔时间;调整全部或部分其他子帧集合上所述信道的所述传输次数,其中,所述其他子帧包括:传输所述信道的全部子帧集合中未调整所述传输次数的子帧集合。
可选地,在所述重复信息为重复等级的情况下,在所述基站发送所述物理层信令或者所述高层信令至所述用户设备之前,所述方法还包括:所述基站确定发送所述物理层信令或者所述高层信令所使用的重复等级,其中,所述基站通过确定的重复等级发送所述物理层信令或者所述高层信令至所述用户设备。
可选地,所述基站确定发送所述物理层信令或者所述高层信令所使用的重复等级包括以下至少之一:所述基站确定当前重复等级为发送所述物理层信令或者所述高层信令所使用的重复等级;所述基站确定最大重复等级为发送所述物理层信令或者所述高层信令所使用的重复等级;在将所述当前重复等级往较小的重复等级调整的情况下,
所述基站确定所述当前重复等级为发送所述物理层信令或者所述高层信令所使用的重复等级;在将所述当前重复等级往较大的重复等级调整的情况下,所述基站确定所述最大重复等级为发送所述物理层信令或者所述高层信令所使用的重复等级;其中,所述最大重复等级是根据配置的最大覆盖等级确定的;所述较小的重复等级、所述当前重复等级、所述较大的重复等级、所述最大重复等级分别对应的所述传输次数呈依次增大的趋势。
根据本发明实施例的另一个方面,还提供了一种重复信息接收方法,包括:用户设备接收指示重复信息的物理层信令或高层信令,其中,所述重复信息用于调整信道的传输次数,所述重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
根据本发明实施例的另一个方面,还提供了一种基站,包括:收发信台,设置为发送指示重复信息的物理层信令或高层信令至用户设备,其中,所述重复信息用于调整信道的传输次数,所述重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
根据本发明实施例的另一个方面,还提供了一种用户设备,包括:接收器,设置为接收指示重复信息的物理层信令或高层信令,其中,所述重复信息用于调整信道的传输次数,所述重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
通过本发明实施例,基站发送指示重复信息的物理层信令或者高层信令至用户设备,其中,该重复信息用于调整信道的传输次数,该重复信息包括以下至少之一:重复等级、重复次数、覆盖等级,解决了采用固定的重复传输次数传输相应信道所导致的资源浪费或重复次数不足的问题,避免了资源浪费,提升了用户设备的覆盖性能。
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1是相关技术中LTE***的一个子帧中控制信道的时频域结构示意图;
图2a是根据本发明实施例的重复信息发送方法的优选流程示意图一;
图2b是根据本发明实施例的重复信息发送方法的优选流程示意图二;
图3是根据本发明实施例的重复信息接收方法的优选流程示意图;
图4是根据本发明实施例的基站的优选结构示意图;
图5是根据本发明实施例的用户设备的优选结构示意图;
图6是根据本优选实施例的重复等级的调整方法的流程示意图;
图7是根据本优选实施例的下行控制信道的重复信息的调整方法的流程示意图。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机***中执行,并且,虽然在流程图中示出了逻辑顺序,但是在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤。
本实施例提供了一种重复信息发送方法,该流程包括如下步骤:
步骤S202,基站发送指示重复信息的物理层信令或者高层信令至用户设备,其中,该重复信息用于调整信道的传输次数,该重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
通过上述步骤,基站通过物理层信令或者高层信令将重复信息发送给用户设备,使得用户设备和基站可以根据重复信息中至少包括的重复等级、重复次数、覆盖等级调整信道的传输次数,从而可以解决采用固定的重复传输次数传输相应信道所导致的资源浪费或重复次数不够的问题,避免了资源浪费,提升了用户设备的覆盖性能。
可选地,上述的重复信息是基站根据用户设备的覆盖性能确定的,其中,覆盖等级用于表示基站的覆盖性能。在一些实施例中,不同的重复等级和/或重复次数和/或覆盖等级与传输次数之间具有相应的对应关系,从而使得用户设备可以根据重复信息中的重复等级、重复次数、覆盖等级的至少一个信息确定相应信道的传输次数。
可选地,用户设备包括:机器类型通信设备或其他可以支持信道重复传输的用户设备。
可选地,在上述步骤S202中,可以进行调整的信道包括以下至少之一:下行控制信道、上行控制信道、下行业务信道、上行业务信道。例如,可以在基站和用户设备之间约定进行调整的信道为下行控制信道和上行控制信道,通过基站向用户设备发送
的包括重复等级和/或重复次数和/或覆盖等级的重复信息,从而调整下行控制信道和上行控制信道的传输次数;或者,在物理层信令或者高层信令中还携带有需要调整的信道的标识,从而实现相应标识的信道的传输次数的调整。其中,在物理层信令或者高层信令还中可以携带多个信道的标识以及每个标识对应的重复等级和/或重复次数和/或覆盖等级,从而分别对多个信道进行不同传输次数的调整。
可选地,一个物理层信令或者高层信令可以对一个信道或者一组信道的传输次数进行调整,例如,一个物理层信令或者高层信令调整下行控制信道、上行控制信道、下行业务信道、上行业务信道中的一个信道的传输次数;又例如,一个物理层信令或者高层信令可以对下行控制信道、上行控制信道、下行业务信道、上行业务信道中的至少两个信道的组合分别进行调整,其中至少两个信道的组合包括:下行控制信道和上行控制信道;下行控制信道和上行业务信道;下行控制信道和下行业务信道;上行控制信道和下行业务信道;上行控制信道和上行业务信道;下行业务信道和上行业务信道;上行控制信道、下行业务信道和上行业务信道;下行控制信道、下行业务信道和上行业务信道;下行控制信道、上行控制信道和上行业务信道;下行控制信道、上行控制信道和下行业务信道;下行控制信道、上行控制信道、下行业务信道和上行业务信道。
可选地,上述的物理层信令可以是以下之一的信令:增强的下行控制信息中的bit域、新增的下行控制信息中的bit域、通过复用传输技术与下行控制信息复用传输的信令。其中,增强的下行控制信息中的bit域包括现有下行控制信息(Downlink Cotrol Information,简称为DCI)格式(format)中的bit域,新增的下行控制信息中的bit域包括新的DCI format中的bit域。其中,现有DCI format中的bit域包括以下至少之一:添加新的bit域、对现有bit域的重新解释。
可选地,在基站通过物理层信令发送重复信息的情况下,发送物理层信令的起始子帧包括:预定义值、按照当前重复等级确定的子帧、按照不同的重复等级确定的子帧,即,发送物理层信令的起始子帧包括以下之一:预定子帧、与当前重复等级对应的子帧、与将要调整到的重复等级对应的子帧。
可选地,上述的预定子帧包括:无线帧的子帧0,或者,满足(k+10×SFN)mod C=0的子帧;其中,k=1,2,3…;SFN表示无线帧的***帧号(System Frame Number,简称为SFN);mod为取模运算;C为正整数,表示预定周期。
可选地,与当前重复等级对应的子帧包括:与当前重复等级的控制信道相同的起始子帧。
可选地,与将要调整到的重复等级对应的子帧包括:与将要调整到的重复等级的控制信道相同的起始子帧。
可选地,基站通过物理层信令发送物理层信令或者高层信令的发送次数包括:一次发送,或者,在预定时间窗内的多组重复发送,例如,在时间窗M内包含k个N次重复传输,其中M、k、N均为正整数。
可选地,在基站多次发送物理层信令或者高层信令至用户设备的情况下,基站以预定的发送周期发送多个物理层信令或者高层信令。
图2a是根据本发明实施例的重复信息发送方法的优选流程示意图一,如图2a所示,可选地,在用户设备接收到物理层信令之后进行ACK/NACK反馈的情况下,在步骤S202之后,该流程还包括:
步骤S204,基站接收用户设备对物理层信令或者高层信令的反馈,例如ACK/NACK反馈。
可选地,重复信息可以在基站发送完物理层信令或者高层信令之后立即开始生效,或者重复信息在发送物理层信令或者高层信令并经过预定时间窗(例如上述的时间窗M)后生效,或者重复信息从发送物理层信令或者高层信令的下一个发送周期(例如上述的预定的发送周期)开始生效,或者基站收到用户设备对物理层信令或者高层信令的反馈信息(例如上述的ACK/NACK反馈)后开始生效。重复信息生效后,基站和用户设备分别对重复信息中指示的相应信道进行相应的传输次数的调整。
可选地,在待调整的信道包括下行控制信道的情况下,用于调整该下行控制信道的重复信息中还可以携带有聚合等级相关的信息,该重复信息还可以用于:在保持下行控制信道的传输次数不变的情况下,调整全部或部分子帧集合上的下行控制信道的聚合等级;或者,调整全部或部分子帧集合上特定聚合等级的下行控制信道的传输次数,其中,特定聚合等级包括一个或者多个聚合等级。
可选地,基站仅在将当前重复等级往较小的重复等级调整的情况下发送重复信息至用户设备,其中,较小的重复等级对应的传输次数小于当前重复等级对应的传输次数。
可选地,调整信道的传输次数包括:调整用于传输信道的部分子帧集合上的信道的传输次数。
可选地,在调整部分子帧集合上信道的重复次数后,还可以把未调整的子帧集在稳定后调整为与部分子帧集合调整后的重复等级。例如,在调整部分子帧集合上信道的传输次数之后,通过以下至少之一的方式确定部分子帧集合上的信道传输稳定:通过部分子帧集合上的信道接收到数据、收到对端响应的表示传输稳定的确认信息、在调整部分子帧集合上信道的传输次数之后达到预定间隔时间;调整全部或部分其他子帧集合上信道的传输次数,其中,其他子帧包括:传输信道的全部子帧集合中未调整传输次数的子帧集合。
图2b是根据本发明实施例的重复信息发送方法的优选流程示意图二,如图2b所示,可选地,在重复信息为重复等级的情况下,在步骤S202之前,该流程还包括如下步骤:
步骤S200,基站确定发送物理层信令或者高层信令所使用的重复等级。
其中,在步骤S202中,基站通过确定的重复等级发送物理层信令或者高层信令至用户设备。
可选地,调整信令发送时使用的重复等级可以包括以下至少之一:以当前重复等级发送调整信令、以最大重复等级发送调整信令;其中,从大的重复等级往小的重复等级调整时优先考虑以当前重复等级发送调整信令、从小的重复等级往大的重复等级调整时优先考虑以最大重复等级发送调整信令。其中,最大重复等级可以是基站配置的最大覆盖等级,或者,***默认配置的最大覆盖等级。
例如,在步骤S200中,基站确定发送物理层信令或者高层信令所使用的重复等级包括以下至少之一:基站确定当前使用的重复等级为发送物理层信令或者高层信令所使用的重复等级;基站确定最大重复等级为发送物理层信令或者高层信令所使用的重复等级;在将当前使用的重复等级往较小的重复等级调整的情况下,基站确定当前使用的重复等级为发送物理层信令或者高层信令所使用的重复等级;在将当前使用的重复等级往较大的重复等级调整的情况下,基站确定最大重复等级为发送物理层信令或者高层信令所使用的重复等级;其中,最大重复等级是根据配置的最大覆盖等级确定的;较小的重复等级、当前重复等级、较大的重复等级、最大重复等级分别对应的传输次数呈依次增大的趋势。
本实施例还提供了一种重复信息接收方法,该重复信息接收方法的流程包括:用户设备接收指示重复信息的物理层信令或高层信令,其中,重复信息用于调整信道的传输次数,重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
可选地,用户设备为机器类型通信设备。
可选地,信道包括以下至少之一:下行控制信道、上行控制信道、下行业务信道、上行业务信道。
可选地,物理层信令包括以下之一:增强的下行控制信息中的bit域、新增的下行控制信息中的bit域、通过复用传输技术与下行控制信息复用传输的信令。
可选地,用户设备通过盲检测接收物理层信令。
图3是根据本发明实施例的重复信息接收方法的优选流程示意图,可选地,该流程包括如下步骤:
步骤S302,用户设备接收指示重复信息的物理层信令或高层信令,其中,重复信息用于调整信道的传输次数,重复信息包括以下至少之一:重复等级、重复次数、覆盖等级;
步骤S304,用户设备向基站发送对物理层信令或者高层信令的反馈。
可选地,一个物理层信令或者高层信令用于调整信道中的一个信道或者一组信道的传输次数,其中,一组信道包括信道中至少两个信道的组合。
可选地,重复信息在基站发送完物理层信令或者高层信令之后开始生效,或者重复信息在发送完物理层信令或者高层信令并经过预定时间窗后生效,或者重复信息从发送物理层信令或者高层信令的下一个发送周期开始生效,或者基站收到用户设备对物理层信令或者高层信令的反馈信息后开始生效。
可选地,在待调整传输次数的信道包括下行控制信道的情况下,重复信息还用于:在保持下行控制信道的传输次数不变的情况下,调整全部或部分子帧集合上的下行控制信道的聚合等级;或者,调整全部或部分子帧集合上特定聚合等级的下行控制信道的传输次数,其中,特定聚合等级包括一个或者多个聚合等级。
可选地,调整信道的传输次数包括:调整用于传输信道的部分子帧集合上信道的传输次数。
可选地,在调整部分子帧集合上信道的传输次数之后,调整信道的传输次数还包括:通过以下至少之一的方式确定部分子帧集合上的信道传输稳定:通过部分子帧集合上的信道接收到数据、收到对端响应的表示传输稳定的确认信息、在调整部分子帧集合上信道的传输次数之后达到预定间隔时间;调整全部或部分其他子帧集合上信道
的传输次数,其中,其他子帧包括:传输信道的全部子帧集合中未调整传输次数的子帧集合。
本实施例还提供了一种基站,该基站设置为实现上述重复信息发送方法,装置实施例中描述的装置具体的实现过程在方法实施例中已经进行过详细说明,在此不再赘述。
该基站包括:收发信台,用于发送指示重复信息的物理层信令或高层信令至用户设备,其中,重复信息用于调整信道的传输次数,重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
可选地,该收发信台还设置为接收用户设备对物理层信令或者高层信令的反馈。
图4是根据本发明实施例的基站的优选结构示意图,如图4所示,可选地,该基站还包括处理器44,耦合至收发信台42,设置为确定发送物理层信令或者高层信令所使用的重复等级。
本实施例还提供了一种用户设备,该基站用于实现上述重复信息接收方法,装置实施例中描述的装置具体的实现过程在方法实施例中已经进行过详细说明,在此不再赘述。
该用户设备包括:接收器,设置为接收指示重复信息的物理层信令或高层信令,其中,重复信息用于调整信道的传输次数,重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
图5是根据本发明实施例的用户设备的优选结构示意图,如图5所示,可选地,该用户设备还包括:发送器54,耦合至接收器52,设置为发送对物理层信令或者高层信令的反馈至基站。
下面结合优选实施例进行描述和说明。
本优选实施例提供了一种重复等级的调整方法,可以应用于LTE/LTE-A***。
图6是根据本优选实施例的重复等级的调整方法的流程示意图,如图6所示,本优选实施例提供的重复等级的调整方法包括:在覆盖增强场景下,基站通过物理层信令或高层信令调整信道的重复信息,其中,该信道包括以下至少之一:下行控制信道、上行控制信道、下行业务信道、上行业务信道。其中,该重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
通过本优选实施例提供的调整方法,能够在有覆盖增强场景下合理实时地调整重复次数。
在上述优选实施例中,物理层信令包括:在现有DCI format中的bit域或者使用新的DCI format中的bit域或者与DCI一起复用传输;现有DCI format中的bit域包括以下至少之一:添加新的bit域、对现有bit域的重新解释。
可选地,基站通过信令调整的信道可以是单独的一个信道,如下行控制信道的重复等级;还可以是多个信道一起调整,如下行控制信道和上行控制信道等。
可选地,调整专用Format,即用于指示重复信息的信令包括以下至少之一的指示域:覆盖等级指示域、重复等级指示域、重复次数指示域。
可选地,上述的物理层信令与DCI一起复用传输至少包括:使用分层调制技术将调整信令与现有DCI一起进行传输。
可选地,物理层信令中,如2比特位(bit)可以指示最多4种重复等级,如表1和表2所示;3bit可以指示最多8中重复等级,如表3所示;4bit指示覆盖等级和重复次数,指示信令高位和地位分别指示,如表4所示。
表1 2bit指示3个覆盖等级/重复等级/次数
索引 | 等级/次数 |
0 | 5dB/4次 |
1 | 10dB/20次 |
2 | 15dB/80次 |
其中,表格中某一个覆盖等级的数值可以表示该索引对应的重复等级最大支持的数值,例如,在表1中,索引0对应覆盖等级范围为(0,5dB],索引1对应覆盖等级范围为(5dB,10dB],索引2对应覆盖等级范围为(10dB,15dB]。以下几个表格相同。
表2 2bit指示4个覆盖等级/重复等级/次数
索引 | 等级/次数 |
0 | 0dB/不重复 |
1 | 5dB/4次 |
2 | 10dB/20次 |
3 | 15dB/80次 |
表3 3bit指示覆盖等级/重复等级/次数
索引 | 等级 |
0 | 0dB |
1 | 3dB |
2 | 6dB |
3 | 9dB |
4 | 12dB |
5 | 15dB |
表4 4bit信令高位和低位分别指示覆盖等级和重复次数
索引 | 等级 | 重复次数 |
0000 | 0dB | 无 |
0001 | 0dB | 无 |
0010 | 0dB | 无 |
0011 | 0dB | 无 |
0100 | 5dB | 2 |
0101 | 5dB | 3 |
0110 | 5dB | 4 |
0111 | 5dB | 6 |
1000 | 10dB | 10 |
1001 | 10dB | 20 |
1010 | 10dB | 30 |
1011 | 10dB | 40 |
1100 | 15dB | 60 |
1101 | 15dB | 80 |
1110 | 15dB | 100 |
1111 | 15dB | 120 |
其中,覆盖等级可选地采用分贝(dB)作为单位,重复等级与重复次数呈一定对应关系,例如,重复等级(或覆盖等级)越高,对应的重复次数可以不变或者越高;或者同一个覆盖等级根据不同的重复等级,可以对应于不同的重复次数。
其中,在本发明实施例的表格中,“索引”可以用于标识不同的覆盖等级、或者不同的重复等级、或者不同的重复次数;可选地,一个索引用于标识由覆盖等级、重复等级、重复次数中的至少两个构成的一组对应关系。
图7是根据本优选实施例的下行控制信道的重复信息的调整方法的流程示意图,如图7所示,可选地,信道为下行控制信道时,调整其重复传输的次数还包括:调整其重复传输时使用的聚合等级、调整部分聚合等级的重复次数、调整部分子帧集合上的聚合等级或聚合等级的重复次数。
可选地,调整下行控制信道的重复等级还包括:
调整其重复传输时使用的聚合等级,即重复次数不变的同时改变使用的聚合等级,如聚合等级(AL)4变为AL8同时重复次数不变;
调整部分聚合等级的重复次数,这里部分指k个聚合等级,k属于集合{1、2、4、8、16、32}中的一个或多个,如仅调整AL8的重复次数;
调整部分子帧集合上的聚合等级或部分聚合等级的重复次数,即对使用重复传输的子帧集合进行调整,这里部分指m个子帧集合,m属于集合{1、2、3、4、...、M}中的一个或多个,M为大于0的正整数。如对SFN值为10-20所对应的子帧,即子帧集合1,调整该子帧集合的聚合等级或部分聚合等级的重复次数。
可选地,调整信道的重复等级还包括:调整部分子帧集合上信道的重复次数;这里部分子帧集合与上述相同。
可选地,在调整部分子帧集合上信道的重复次数后,把未调整的子帧集合在稳定后调整为与部分子帧集合调整后的重复等级。稳定后指收到数据、或收到确认信息、或间隔时间X毫秒,其中X为正整数,其值可以根据***的需求灵活设置。
可选地,调整部分子帧集合上信道的重复次数,如第1个子帧集合,此时其余子帧集合仍然按照当前重复等级进行重复传输。
可选地,调整部分子帧集合上信道的重复次数,如第1个子帧集合,此时其余子帧集合仍然按照当前重复等级进行重复传输。在第1个子帧集合调整后并且稳定后,其余子帧集也调整为与第1个子帧集相同的重复等级。
可选地,调整信令发送时使用的重复等级包括以下至少之一:以当前重复等级发送调整信令、以最大重复等级发送调整信令。
可选地,从大的重复等级往小的重复等级调整时优先考虑以当前重复等级发送调整信令、从小的重复等级往大的重复等级调整时优先考虑以最大重复等级发送调整信令;其中,最大重复等级可以是基站配置的最大覆盖等级,或者,默认配置的最大覆盖等级;
可选地,调整信令发送时仅支持从较大的重复等级往较小的重复等级调整。
可选地,从大的重复等级往小的重复等级调整时优先考虑以当前重复等级发送调整信令,如当有0、1、2、3四个重复等级,从重复等级2向重复等级1进行调整时,使用重复等级2对应的20次重复进行发送调整信令;从小的重复等级往大的重复等级
调整时优先考虑以最大重复等级发送调整信令,如当有0、1、2、3四个重复等级,从重复等级1向重复等级2进行调整时,使用重复等级3对应的80次重复进行发送调整信令;
可选地,物理层信令的发送起始子帧包括:预定义值、按照当前重复等级确定、按照不同的重复等级确定。
其中,预定义值包括无线帧子帧0或者满足(k+10×SFN)mod C=0的子帧,C为预定义的周期值。
其中,按照当前重复等级确定为与当前重复等级的控制信道使用相同的起始子帧。可选地,发送调整重复等级的物理层信令与当前覆盖等级的控制信道使用相同的起始子帧。例如当前覆盖等级的控制信道使用的起始子帧为满足(k+10×SFN)mod N=0的子帧,其中N为重复次数,则发送调整重复等级的物理层信令所在的起始子帧也满足(k+10×SFN)mod N=0。
其中,按照不同的重复等级确定为起始子帧与要调整到的重复等级成对应关系。可选地,一种可能的对应关系为:假设重复等级Li时下行控制信道的重复次数为Ni,则发送调整重复等级的物理层信令所在的起始子帧满足(k+10×SFN)mod Ni=0。
可选地,物理层信令的发送次数包括:仅发送一次、在时间窗M内包含k个N次重复传输。其中,在时间窗M内包含k个N次重复传输中的窗长M为大于等于k×M的值。
可选地,物理层信令的以周期C进行发送,其中C为正整数,其值可以根据***的需求灵活设置。
可选地,终端接收在到物理层信令之后进行ACK/NACK反馈。
可选地,物理层信令的生效时间包括:发送完成该信令后立即生效、时间窗M后生效、下一周期C生效、收到反馈后生效。
可选地,仅发送一次调整信令时,发送完成该信令后立即生效,包括下一子帧或下一无线帧;对于调整时,以窗长M(内含k个N次重复传输)进行调整时,可以在下一个时间窗M生效;对于以周期C进行调整时可以在下一周期生效;对于有反馈信息时,可以以收到反馈信息后生效。
可选地,调整信道的重复等级包括:使用一个物理层信令或高层信令调整一个信道、使用一个物理层信令或高层信令调整信道的组合,组合方式包括但不限于以下至少之一的方式:{下行控制信道和上行控制信道}、{下行业务信道和上行业务信道}、{下行控制信道和下行业务信道和上行业务信道}、{下行控制信道和上行控制信道和下行业务信道和上行业务信道}等至少两种信道的组合。
可选地,终端根据测量决定是否需要调整重复等级,若需要调整则触发接入过程。
可选地,终端检测承载调整信令的下行控制信道时,一种是以当重复等级进行检测,一种是同时以当前重复等级和最大重复等级进行检测。
实施例1
在覆盖增强场景下,基站通过物理层信令调整下行控制信道的重复等级/次数或覆盖等级。
其中,物理层信令是在现有DCI format中添加新的bit域来实现指示调整的;该新的bit域包含重复等级指示域或重复次数指示域。物理层信令中,可以采用2bit指示3种重复等级,例如表5所示。
表5 2bit指示3个覆盖等级/重复等级/次数
索引 | 等级/次数 |
0 | 5dB/4次 |
1 | 10dB/20次 |
2 | 15dB/80次 |
该物理层信令的发送起始子帧按照当前重复等级确定。发送该调整重复等级的物理层信令与当前覆盖等级的控制信道使用相同的起始子帧。当前覆盖等级的控制信道使用的起始子帧为满足(k+10×SFN)mod N=0的子帧,其中k为起始子帧,N为重复次数,则发送调整重复等级的物理层信令所在的起始子帧也满足(k+10×SFN)mod N=0。该物理层信令使用当前重复等级进行发送,且仅发送一次。
该物理层信令的生效时间为发送完成该信令后立即生效。
通过本实例的实施,可以使得在覆盖增强场景下,重复传输的控制信道在覆盖需求改变时能够快速的调整。
实施例2
在覆盖增强场景下,基站通过高层信令,例如无线资源控制协议(Radio Resource Control,简称为RRC)信令(包含***信息块(System Information Block,简称为SIB)消息),调整下行业务信道的重复等级/次数或覆盖等级。
其中,RRC信令使用的bit域包含重复等级指示域或重复次数指示域。RRC信令中,可以采用2bit指示4种重复等级,如表6所示。
表6 2bit指示4个覆盖等级/重复等级/次数
索引 | 等级/次数 |
0 | 0dB/不重复 |
1 | 5dB/4次 |
2 | 10dB/30次 |
3 | 15dB/150次 |
承载该RRC信令的PDSCH发送起始子帧按照与相应的PDCCH定时关系确定,即重复发送的PDCCH结束后k个子帧起始,如k=1。该RRC信令使用当前重复等级进行发送,且仅发送一次。
该RRC信令的生效时间为收到反馈信息且正确后生效。
通过本实例的实施,可以使得在覆盖增强场景下,重复传输的业务信道在覆盖需求改变时能够及时调整并且保证调整的正确性。
实施例3
在覆盖增强场景下,基站通过物理层信令调整上行控制信道的重复等级/次数或覆盖等级。
其中,物理层信令是在现有DCI format中添加新的bit域来实现指示调整的;该新的bit域包含重复等级指示域或重复次数指示域。物理层信令中,可以采用2bit指示3种重复等级,如表7所示。
表7 2bit指示3个覆盖等级/重复等级/次数
索引 | 等级/次数 |
0 | 5dB/无 |
1 | 10dB/2次 |
2 | 15dB/10次 |
该物理层信令的发送起始子帧按照预定义值确定。发送该调整重复等级的物理层信令使用无线帧子帧0作为起始子帧并且使用当前重复等级确定的重复次数N,同时该物理层信令的发送在时间窗M内包含k个N次重复传输,如k=2,M≥2N。
该物理层信令的生效时间为以窗长M(内含k个N次重复传输)进行调整时在下一个时间窗M生效。
通过本实例的实施,可以使得在覆盖增强场景下,重复传输的控制信道在覆盖需求改变时能够及时的调整且通过多次传输保证调整的正确性。
实施例4
在覆盖增强场景下,基站通过物理层信令调整下行控制信道的重复等级/次数或覆盖等级。
其中,物理层信令是在现有DCI format中添加新的bit域来实现指示调整的;该新的bit域包含重复等级指示域或重复次数指示域。物理层信令中,可以采用4bit信令高位和低位分别指示覆盖等级和重复次数,如表8中所示,其中索引的高2bit指示覆盖等级,低2bit指示重复次数。
表8 4bit信令高位和低位分别指示覆盖等级和重复次数
索引 | 等级 | 重复次数 |
0000 | 0dB | 无 |
0001 | 0dB | 无 |
0010 | 0dB | 无 |
0011 | 0dB | 无 |
0100 | 5dB | 2 |
0101 | 5dB | 3 |
0110 | 5dB | 4 |
0111 | 5dB | 6 |
1000 | 10dB | 10 |
1001 | 10dB | 20 |
1010 | 10dB | 30 |
1011 | 10dB | 40 |
1100 | 15dB | 60 |
1101 | 15dB | 80 |
1110 | 15dB | 100 |
1111 | 15dB | 120 |
该物理层信令的发送起始子帧按照预定义值确定。发送该调整重复等级的物理层信令使用满足(k+10×SFN)mod C=0的子帧作为起始子帧,C为预定义的周期值,
如200毫秒(ms)。该物理层信令的以周期C进行发送,同时以最大重复等级进行发送。
该物理层信令的生效时间为对于以周期C进行调整时下一周期生效。
通过本实例的实施,可以使得在覆盖增强场景下,重复传输的控制信道在覆盖需求改变时能够及时的调整并且可以通过各个周期进行校准。
实施例5
在覆盖增强场景下,基站通过物理层信令调整下行控制信道的重复等级/次数或覆盖等级。
其中,物理层信令是与DCI一起隐式传输来实现指示调整的,例如使用分层调制技术将调整信令与现有DCI一起进行传输。该物理层信令包含重复等级指示域或重复次数指示域。物理层信令中,可以采用2bit指示3种重复等级,如表9所示。
表9 2bit指示3个覆盖等级/重复等级/次数
索引 | 等级/次数 |
0 | 5dB/4次 |
1 | 10dB/20次 |
2 | 15dB/80次 |
该物理层信令的发送起始子帧按照不同的重复等级确定。发送该调整重复等级的物理层信令与要调整到的重复等级的控制信道使用相同的起始子帧。例如与要调整到的重复等级成对应关系,一种可能的对应关系为:假设重复等级Li时下行控制信道的重复次数为Ni,则发送调整重复等级的物理层信令所在的起始子帧满足(k+10×SFN)mod Ni=0。该物理层信令使用将要调整到的重复等级进行发送,且仅发送一次。
该物理层信令的生效时间为发送完成该信令收到反馈信息且正确后生效。
通过本实例的实施,可以使得在覆盖增强场景下,重复传输的控制信道在覆盖需求改变时能够及时调整且终端通过盲检各个等级的起始位置获得调整信令。
实施例6
在覆盖增强场景下,基站通过物理层信令调整下行控制信道的重复等级/次数或覆盖等级。
其中,物理层信令是在现有DCI format中添加新的bit域来实现指示调整的;该新的bit域包含聚合等级指示域。物理层信令中,可以采用1bit指示2种聚合等级,如表10所示。
表10 1bit指示2个聚合等级
索引 | 聚合等级 |
0 | AL4 |
1 | AL8 |
该物理层信令的发送起始子帧按照当前重复等级确定。发送该调整重复等级的物理层信令与当前覆盖等级的控制信道使用相同的起始子帧。当前覆盖等级的控制信道使用的起始子帧为满足(k+10×SFN)mod N=0的子帧,其中k为起始子帧,N为重复次数,则发送调整重复等级的物理层信令所在的起始子帧也满足(k+10×SFN)mod N=0。该物理层信令使用当前重复等级进行发送,且仅发送一次。
该物理层信令的生效时间为发送完成该信令后立即生效。
通过本实例的实施,可以使得在覆盖增强场景下,重复传输的控制信道在覆盖需求改变时能够及时的调整且仅调整聚合等级不改变重复次数,适合覆盖需求有较小改变的情况。
实施例7
在覆盖增强场景下,基站通过物理层信令调整下行控制信道和下行业务信道的重复等级/次数或覆盖等级。
其中,物理层信令是在现有DCI format中添加新的bit域来实现指示调整的;该新的bit域包含重复等级指示域或重复次数指示域。物理层信令中,可以采用2bit指示4种重复等级,如表11所示,其中,在表11中示出了下行控制信道和下行业务信道使用相同的重复等级但各自使用不同的重复次数。
表11 2bit指示4种重复等级
索引 | 等级 | 下行控制信道重复次数 | 下行业务信道重复次数 |
0 | 0dB | 不重复 | 不重复 |
1 | 5dB | 4 | 4 |
2 | 10dB | 20 | 30 |
3 | 15dB | 80 | 150 |
该物理层信令从当前重复等级2往重复等级1进行调整,该物理层信令的发送起始子帧按照当前重复等级确定。发送该调整重复等级的物理层信令与当前覆盖等级的
控制信道使用相同的起始子帧。当前覆盖等级的控制信道使用的起始子帧为满足(k+10×SFN)mod N=0的子帧,其中k为起始子帧,N为重复次数,则发送调整重复等级的物理层信令所在的起始子帧也满足(k+10×SFN)mod N=0。该物理层信令使用当前重复等级进行发送,且仅发送一次。
该物理层信令的生效时间为发送完成该信令后立即生效。
通过本实例的实施,可以使得在覆盖增强场景下,重复传输的控制信道和业务信道在覆盖需求改变时能够同时快速的调整。
通过本发明实施例,基站发送指示重复信息的物理层信令或者高层信令至用户设备,其中,该重复信息用于调整信道的传输次数,该重复信息包括以下至少之一:重复等级、重复次数、覆盖等级,解决了采用固定的重复传输次数传输相应信道所导致的资源浪费或重复次数不足的问题,避免了资源浪费,提升了用户设备的覆盖性能。
显然,本领域的技术人员应该明白,上述的本发明的各模块或各步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上,可选地,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在存储装置中由计算装置来执行,或者将它们分别制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样,本发明不限制于任何特定的硬件和软件结合。
以上上述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (20)
- 一种重复信息发送方法,包括:基站发送指示重复信息的物理层信令或者高层信令至用户设备,其中,所述重复信息用于调整信道的传输次数,所述重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
- 根据权利要求1所述的方法,其中,所述用户设备包括:机器类型通信设备。
- 根据权利要求1所述的方法,其中,所述信道包括以下至少之一:下行控制信道、上行控制信道、下行业务信道、上行业务信道。
- 根据权利要求1所述的方法,其中,在所述基站通过所述物理层信令发送所述重复信息的情况下,所述物理层信令包括以下之一:增强的下行控制信息中的bit域、新增的下行控制信息中的bit域、通过复用传输技术与下行控制信息复用传输的信令。
- 根据权利要求1所述的方法,其中,在所述基站通过物理层信令发送所述重复信息的情况下,发送所述物理层信令的起始子帧包括以下之一:预定子帧、与当前重复等级对应的子帧、与将要调整到的重复等级对应的子帧。
- 根据权利要求5所述的方法,其中,所述预定子帧包括:无线帧的子帧0,或者,满足(k+10×SFN)mod C=0的子帧;其中,k=1,2,3…;SFN表示无线帧的***帧号;mod为取模运算;C为正整数,表示预定周期;所述与当前重复等级对应的子帧包括:与所述当前重复等级的控制信道相同的起始子帧;所述与将要调整到的重复等级对应的子帧包括:与所述将要调整到的重复等级的控制信道相同的起始子帧。
- 根据权利要求1所述的方法,其中,所述基站通过一次发送或者在预定时间窗内的多组重复发送的方式,发送所述物理层信令或者所述高层信令。
- 根据权利要求1所述的方法,其中,在所述基站多次发送所述物理层信令或者所述高层信令的情况下,所述基站以预定的发送周期发送所述物理层信令或者所述高层信令。
- 根据权利要求1所述的方法,其中,在所述基站发送所述物理层信令或者所述高层信令至所述用户设备之后,所述方法还包括:所述基站接收所述用户设备对所述物理层信令或者所述高层信令的反馈。
- 根据权利要求3所述的方法,其中,一个所述物理层信令或者所述高层信令用于调整所述信道中的一个信道或者一组信道的传输次数,其中,所述一组信道包括所述信道中至少两个信道的组合。
- 根据权利要求1所述的方法,其中,所述重复信息在所述基站发送完所述物理层信令或者所述高层信令之后开始生效,或者所述重复信息在发送所述物理层信令或者所述高层信令并经过预定时间窗后生效,或者所述重复信息从发送所述物理层信令或者所述高层信令的下一个发送周期开始生效,或者所述基站收到所述用户设备对所述物理层信令或者所述高层信令的反馈信息后开始生效。
- 根据权利要求3所述的方法,其中,在所述信道包括下行控制信道的情况下,所述重复信息还用于:在保持所述下行控制信道的传输次数不变的情况下,调整全部或部分子帧集合上的所述下行控制信道的聚合等级;或者,调整所述全部或部分子帧集合上特定聚合等级的所述下行控制信道的传输次数,其中,所述特定聚合等级包括一个或者多个聚合等级。
- 根据权利要求1至12中任一项所述的方法,其中,所述基站仅在将当前重复等级往较小的重复等级调整的情况下发送所述重复信息至所述用户设备,其中,所述较小的重复等级对应的传输次数小于所述当前重复等级对应的传输次数。
- 根据权利要求1至12中任一项所述的方法,其中,调整所述信道的所述传输次数包括:调整用于传输所述信道的部分子帧集合上所述信道的所述传输次数。
- 根据权利要求14所述的方法,其中,在调整所述部分子帧集合上所述信道的所述传输次数之后,调整所述信道的所述传输次数还包括:通过以下至少之一的方式确定所述部分子帧集合上的所述信道传输稳定:通过所述部分子帧集合上的所述信道接收到数据、收到对端响应的表示传输稳 定的确认信息、在调整所述部分子帧集合上所述信道的所述传输次数之后达到预定间隔时间;调整全部或部分其他子帧集合上所述信道的所述传输次数,其中,所述其他子帧包括:传输所述信道的全部子帧集合中未调整所述传输次数的子帧集合。
- 根据权利要求1至12中任一项所述的方法,其中,在所述重复信息为重复等级的情况下,在所述基站发送所述物理层信令或者所述高层信令至所述用户设备之前,所述方法还包括:所述基站确定发送所述物理层信令或者所述高层信令所使用的重复等级,其中,所述基站通过确定的重复等级发送所述物理层信令或者所述高层信令至所述用户设备。
- 根据权利要求16所述的方法,其中,所述基站确定发送所述物理层信令或者所述高层信令所使用的重复等级包括以下至少之一:所述基站确定当前重复等级为发送所述物理层信令或者所述高层信令所使用的重复等级;所述基站确定最大重复等级为发送所述物理层信令或者所述高层信令所使用的重复等级;在将所述当前重复等级往较小的重复等级调整的情况下,所述基站确定所述当前重复等级为发送所述物理层信令或者所述高层信令所使用的重复等级;在将所述当前重复等级往较大的重复等级调整的情况下,所述基站确定所述最大重复等级为发送所述物理层信令或者所述高层信令所使用的重复等级;其中,所述最大重复等级是根据配置的最大覆盖等级确定的;所述较小的重复等级、所述当前重复等级、所述较大的重复等级、所述最大重复等级分别对应的所述传输次数呈依次增大的趋势。
- 一种重复信息接收方法,包括:用户设备接收指示重复信息的物理层信令或高层信令,其中,所述重复信息用于调整信道的传输次数,所述重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
- 一种基站,包括:收发信台,用于发送指示重复信息的物理层信令或高层信令至用户设备,其中,所述重复信息用于调整信道的传输次数,所述重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
- 一种用户设备,包括:接收器,设置为接收指示重复信息的物理层信令或高层信令,其中,所述重复信息用于调整信道的传输次数,所述重复信息包括以下至少之一:重复等级、重复次数、覆盖等级。
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