WO2014111038A1 - Tdd上下行子帧比例的双周期动态配置方法、基站、系统和通信设备 - Google Patents
Tdd上下行子帧比例的双周期动态配置方法、基站、系统和通信设备 Download PDFInfo
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- WO2014111038A1 WO2014111038A1 PCT/CN2014/070783 CN2014070783W WO2014111038A1 WO 2014111038 A1 WO2014111038 A1 WO 2014111038A1 CN 2014070783 W CN2014070783 W CN 2014070783W WO 2014111038 A1 WO2014111038 A1 WO 2014111038A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a dual-cycle dynamic configuration method, a base station, a system, and a communication device for TDD uplink-downlink subframe ratio. Background technique
- the new generation of wireless communication technology has developed rapidly. Compared with the third generation of wireless communication technology, the new generation of mobile communication technology has many advantages such as simple network architecture, small signal delay, high communication quality and fast speed.
- the new generation of mobile communication technologies can be divided into TDD (Time Division Duplex) system and FDD (Frequency Division Duplex) system.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the TDD system is more efficient in utilizing system resources.
- the base station can use different radio frame structures of different uplink and downlink subframe ratios between base stations according to different uplink and downlink traffic.
- the existing TDD technology limits the flexible deployment of the downlink subframe ratio configuration on the TDD system.
- the base station 1 serves the terminal 1
- the base station 2 serves the terminal 2
- the base station 1 currently uses the downlink subframe 102 and the base station 2 currently uses the uplink subframe 104, except for the base station 1 and the terminal 1, the base station 2
- the normal signal 2 between the terminal 2 and the terminal 2 also has an interference signal 1 caused by different uplink and downlink configurations between the terminal 1 and the terminal 2, and between the base station 1 and the base station 2, that is, cross interference.
- the International Organization for Standardization (3GPP) launched the eMTA project (Further enhancements to LTE Time Division Duplex (TDD) for Downlink-Uplink Interference Management and Traffic Adaptation) in May 2010 to study the new version of UE (User Equipment, user). Equipment) How to implement service adaptation and interference management of the TDD system under the condition of hybrid networking with the old version of the UE, where the new version of the UE refers to the user terminal supporting the R12 (version 12 protocol) and subsequent protocol versions of the 3GPP, and the old version The UE refers to a user terminal supporting a version protocol (such as R10, R1 1, etc.) before R12 of 3GPP.
- a version protocol such as R10, R1 1, etc.
- elMTA needs normal behavior for certain UEs, such as downlink measurement, SRS (uplink pilot) transmission, HARQ (Hybrid Automatic Repeat Request) retransmission, etc. Make some restrictions. These restrictions may degrade the system performance of older versions of UEs.
- the system determines the proportion of the TDD uplink and downlink subframes to be used in the next reconfiguration period according to the current traffic load, that is, the calculation is within the dynamic adjustment range (such as within a cell), and all UEs
- the TDD uplink-downlink subframe ratio finds the configuration closest to it, and use this configuration as the TDD uplink-downlink subframe ratio configuration that is expected to be used in the next matching week. Specifically, as shown in FIG. 2, the number of the special subframe 202, the uplink subframe 204, and the downlink subframe 206 included in the LTE (A) radio frame corresponding to the different TDD uplink and downlink subframe ratios is different.
- the old version of UE does not support a short reconfiguration period. Therefore, for the existing reconfiguration algorithm, either use the short reconfiguration period (starting the elMTA function) and sacrifice the performance of the old version UE; or use the long reconfiguration period (turning off the elMTA function) to sacrifice the performance of the new version of UE. As a result, the performance of the old version of the UE and the new version of the UE cannot be balanced, dynamic configuration The gain on the overall performance of the system is not fully reflected.
- the present invention is based on the above problems, and proposes a new technical solution.
- different configuration parameters can be adopted for different communication devices, and the performance of some communication devices is avoided when a single parameter is adopted. decline.
- the present invention provides a dual-cycle dynamic configuration method for TDD uplink-downlink subframe ratio, which is used for time division duplexing of a first type of communication device supporting the elMTA function and a second type communication device not supporting the elMTA function.
- the configuration of the uplink and downlink subframes, the dynamic configuration method includes: determining a first configuration parameter that needs to be applied to a time division duplex uplink and downlink subframe ratio of the first type of communication device; Determining a corresponding second configuration parameter by one or more historical first configuration parameters; applying the first configuration parameter to the first type of communication device in a first reconfiguration period, and placing the second configuration parameter in A second reconfiguration period is applied to the second type of communication device.
- the first type of communication device is a new version of the UE (that is, the UE has and has the elMTA function enabled), and the second type of communication device may be the old version of the UE (ie, the UE does not have the elMTA function), or For the new version of the UE (that is, the UE has but not enabled the elMTA function).
- dynamic configuration of time-division duplex uplink-downlink subframe ratios is implemented by using different configuration parameters, which avoids sacrificing the performance of the old version UE when using the short re-matching period, or sacrificing the new version when using the long re-matching period.
- UE performance through the dual-cycle application, enables the performance of both types of UEs to be balanced, fully demonstrating the gain of dynamic configuration on the overall performance of the system.
- the configuration parameter refers to a certain uplink and downlink subframe ratio selected therefrom.
- the "history first configuration parameter” refers to a configuration parameter applied to the first type of communication device in the current reconfiguration period and the previous reconfiguration period. Of course, it may be set to include the currently acquired first configuration parameter.
- the determining the corresponding second configuration parameter comprises: using, as the second configuration parameter, a configuration parameter that is used most frequently by the first type of communication device in a specified time window; Or using, as the second configuration parameter, a configuration parameter that uses the least number of uplink or downlink subframes in the configuration parameter used by the first type of communication device in the specified time window; or the first type of communication device is a configuration parameter that has the largest number of uplink or downlink subframes in the configuration parameter used in the specified time window as the second configuration parameter; or a configuration parameter used by the first type of communication device in a most recent reconfiguration period As the second configuration parameter; or a configuration parameter used by the first type of communication device in a current reconfiguration period as the second configuration parameter.
- the first configuration parameter required by the first type of communication device can be obtained by using a related technology, for example, the total amount of uplink data to be sent of all the first type of communication devices and the to-be-sent data to be sent by the base station.
- the ratio of the total amount, and according to the ratio of the to-be-sent data find the configuration closest to the seven TDD uplink and downlink subframe ratio configurations specified in the 3GPP protocol, and use this configuration as the TDD uplink and downlink to be used in the next matching period.
- Subframe ratio configuration For the second configuration parameter, it can be selected in different ways according to actual needs or actual conditions. Of course, it should be understood by those skilled in the art that, besides the various modes already mentioned in the above scheme, it is obvious that the first configuration parameter or the first selection for the next reconfiguration period can be selected in other unmentioned manners.
- the method before the step of determining the corresponding second configuration parameter, the method further includes: presetting at least one associated configuration parameter for each protocol definition configuration parameter; and corresponding to the second in the determining After the step of configuring the parameter, the method further includes: acquiring the associated configuration parameter corresponding to the second configuration parameter, and replacing the second configuration parameter by the associated configuration parameter, to apply the associated configuration parameter to the The second type of communication device.
- the protocol definition configuration parameter refers to seven different uplink and downlink subframe proportional configurations that have been specified in 3GPP.
- the second configuration parameter determined according to the historical first configuration parameter can be directly applied to the second type of communication device
- it is sometimes necessary to use an associated configuration parameter corresponding to the second configuration parameter by setting an association relationship between a plurality of configuration parameters in advance) to be applied to the second type of communication device.
- the association relationship may not be set in advance.
- the associated configuration parameter that is actually needed to be applied to the second type of communication device may be directly calculated by the second configuration parameter obtained in real time through a specific algorithm.
- the step of applying the first configuration parameter to the first type of communication device comprises: sending reconfiguration signaling to the first type of communication device, to notify the first The class communication device applies the first configuration parameter in a next reconfiguration period.
- the first type of communication device can know the configuration parameters that need to be applied by itself.
- each of the uplink and downlink subframe ratios corresponds to different parameters, and the parameter may be indicated in the reconfiguration signaling to represent the corresponding uplink and downlink subframe ratio.
- the reconfiguration signaling here may be the newly proposed signaling that is not in the R10/1 1 or other current version of the protocol, or may add new information in the existing signaling.
- the corresponding second type of configuration parameter can be notified by a system message (such as SIB 1 ).
- the reconfiguration signaling includes: physical downlink control channel signaling, medium access control signaling, or radio resource control protocol signaling.
- the first configuration indication field is added to the control information of the physical downlink control channel signaling, where the first configuration indication is added, when the reconfiguration signaling is the physical downlink control channel signaling.
- the domain includes the information of the first configuration parameter; when the reconfiguration signaling is the medium access control signaling, adding a control element to the medium access control signaling, where the control element includes the first configuration.
- the second configuration indication field or the new RRC layer signaling includes information about the first configuration parameter.
- a domain may be added to the control information (DCI, Downlink Control Information) carried by the downlink control channel (PDCCH) to indicate the matching configuration used in the next reconfiguration period.
- DCI Downlink Control Information
- it can be a 3-bit "TDD Config Indicator” field
- MAC medium access control
- CE MAC layer control element
- RRC Radio Resource Control
- the "addition" here refers to the current R10/1 1 (or other versions of the protocol prior to R12), including the use of reserved bits/domains currently in PDCCH, MAC or RRC. Either a new bit/field is added so that it can be used for information containing the first configuration parameters proposed in the present invention.
- the method further includes: obtaining an actual transmission direction of each subframe of the second type of communication device; if the actual transmission direction of the subframe is specified, and the TDD uplink and downlink in the system message (ie, SIB1) If the nominal transmission direction of the frame ratio configuration parameter (ie, the second configuration parameter) is inconsistent, the operation function corresponding to the nominal transmission direction on the designated subframe is restricted.
- the uplink/downlink subframe corresponding to the TDD uplink-downlink subframe proportion configuration parameter originally in the system message may actually become the downlink when applied to the second type communication device.
- / Uplink subframe resulting in a backward compatibility issue for the second type of communication device. Therefore, in the case where the above problem occurs, by restricting the operation functions of the subframes originally corresponding to the uplink/downlink, the erroneous data transmission or reception due to the change of the subframe transmission direction is avoided, and the second type of communication device is enhanced. Backward compatibility.
- the step of limiting the data transmission behavior includes: when an actual transmission direction of the specified uplink subframe of the second type communication device is a downlink direction And prohibiting, by the specified uplink subframe, calling uplink data of the second type of communication device; and when designating the second type of communication device When the actual transmission direction of the downlink subframe is the uplink direction, the downlink data of the second type of communication device is prohibited from being invoked by the specified downlink subframe.
- the step of limiting the measurement behavior comprises: uploading a measurement result of an actual transmission direction to a downlink subframe in an uplink direction, and the actual transmission direction is The result of the combination of the last measurement result of the downlink subframe in the downlink direction or the result of the combination of the most recent measurement results as the current measurement result; and/or limiting the second type of communication device only in the sequence number 0, 1, 5, Performing downlink measurement at a subframe of 6; and/or setting a downlink subframe whose actual transmission direction is an uplink direction to a subframe having no measurement behavior; and/or transmitting a disable measurement signaling to prohibit the second type of communication device The downlink measurement at the downlink subframe in which the actual transmission direction is the uplink direction.
- the "merging processing result" of multiple measurement results can be understood as processing multiple measurement results according to a preset algorithm, such as calculating an average value of multiple measurement results, or multiplying different measurement results by different After the weights are summed and so on.
- the subframes with the sequence numbers 0, 1, 5, and 6 are the specified downlink subframes, and will not change to the uplink subframes in the uplink and downlink subframe configuration, so that the backward compatibility problem is not caused.
- MBSFN subframes Multicast/Broadcast over Single Frequency Network
- ABS subframes Almost Blank Subframe
- the frame will not continue to perform downstream measurements and will not cause backward compatibility issues.
- the method of prohibiting measurement signaling may limit the downlink measurement by using Time Domain Measurement resource restriction (LTE) defined by LTE.
- LTE Time Domain Measurement resource restriction
- the step of limiting the signaling or channel transmission or reception behavior comprises: when the second type communication device When the actual transmission direction of the specified uplink subframe is the downlink direction, the specified uplink subframe is prohibited from transmitting signaling/channel uplink; and/or the second type of communication device is restricted to be specified only in the subframe with sequence number 2 Uplinking of signaling/channel; and/or limiting the second type of communication device to perform downlink reception of a specified signaling/channel only at subframes of sequence numbers 0, 1, 5, 6.
- the subframes with sequence number 2 are all uplink subframes, and the subframes with sequence numbers 0, 1, 5, and 6 are all downlink subframes. Therefore, by specifying only subframes 2 Performing the uplink operation and performing the downlink operation only in the subframes 0, 1, 5, and 6 can effectively avoid errors caused by the change of the subframe transmission direction.
- the method further includes: acquiring feature information of the first type of communication device or the second type of communication device; and when the value of the feature information is greater than or equal to a preset threshold, The elMTA function is described, otherwise the elMTA function is turned off.
- the elMTA function can be automatically switched according to the actual situation, thereby avoiding performance loss and inconvenience caused by the manual switch.
- the feature information includes at least one of the following or a combination thereof: the total number of the first type of communication device or the second type of communication device, the first type of communication device or The number of communication devices in an active state in the second type of communication device, the amount of data to be sent corresponding to the first type of communication device or the second type of communication device, and all communication devices in which the total number is within a specified range
- the proportion of the quantity, the proportion of the number of active devices in the specified range, the total number of communication devices in the specified range, and all the pending data within the specified range The proportion of the quantity.
- the method further includes: when the TDD uplink and downlink subframe proportion configuration parameter (ie, the second configuration parameter) in the system message (such as SIB 1 ) and the second type of communication device are currently heavy
- the configuration parameters of the periodic application are different, it is prohibited to notify the first type of communication device of the TDD uplink-downlink subframe ratio in the system message (ie, SIB 1 ) Example configuration parameters.
- the new version of the UE can be prevented from receiving multiple configuration parameters at the same time, so that the TDD can be correctly implemented. Configuration of the line subframe proportion configuration parameter.
- the step of limiting the data transmission behavior includes: when an actual transmission direction of the specified uplink subframe of the second type communication device is a downlink direction
- the specified uplink subframe is prohibited from invoking uplink data of the second type of communication device, or when the actual transmission direction of the specified downlink subframe of the second type communication device is an uplink direction, the designated downlink is prohibited.
- the frame invokes downlink data of the second type of communication device.
- a base station serving a first type of communication device supporting an elMTA function and a second type of communication device not supporting an eMTTA function
- the base station comprising: a parameter determining unit, a first configuration parameter used to determine a time division duplex uplink and downlink subframe ratio that needs to be applied to the first type of communication device, and determining corresponding according to one or more historical first configuration parameters used by the first type of communication device a second configuration parameter; a parameter application unit, configured to apply the first configuration parameter to the first type of communication device in a first reconfiguration period, and apply the second configuration parameter in a second reconfiguration period In the second type of communication device.
- the first type of communication device is a new version of the UE (that is, the UE has and has the elMTA function enabled), and the second type of communication device may be the old version of the UE (ie, the UE does not have the elMTA function), or For the new version of the UE (that is, the UE has but not enabled the elMTA function).
- dynamic configuration of time-division duplex uplink-downlink subframe ratios is implemented by using different configuration parameters, which avoids sacrificing the performance of the old version UE when using the short re-matching period, or sacrificing the new version when using the long re-matching period.
- UE performance through the dual-cycle application, enables the performance of both types of UEs to be balanced, fully demonstrating the gain of dynamic configuration on the overall performance of the system.
- the configuration parameter refers to a certain uplink and downlink subframe ratio selected therefrom.
- the "history first configuration parameter” refers to a configuration parameter applied to the first type of communication device in the current reconfiguration period and the previous reconfiguration period. Of course, it may be set to include the currently acquired first configuration parameter.
- the parameter determining unit uses the configuration parameter that is used most frequently by the first type of communication device in a specified time window, and the first type of communication device is used in the specified time window.
- the first configuration parameter required by the first type of communication device can be obtained by using a related technology, for example, the total amount of uplink data to be sent of all the first type of communication devices and the to-be-sent data to be sent by the base station.
- the ratio of the total amount, and according to the ratio of the to-be-sent data find the configuration closest to the seven TDD uplink and downlink subframe ratio configurations specified in the 3GPP protocol, and use this configuration as the TDD uplink and downlink to be used in the next matching period.
- Subframe ratio configuration For the second configuration parameter, it can be selected in different ways according to actual needs or actual conditions. Of course, it should be understood by those skilled in the art that, besides the various modes already mentioned in the above scheme, it is obvious that the first configuration parameter or the first selection for the next reconfiguration period can be selected in other unmentioned manners.
- the method further includes: an association setting unit, configured to preset at least one associated configuration parameter for each protocol definition configuration parameter; wherein the parameter determination unit further acquires the second configuration parameter Said The configuration parameters are associated, and the second configuration parameter is replaced by the associated configuration parameter to apply the associated configuration parameter to the second type of communication device.
- the protocol definition configuration parameter refers to seven different uplink and downlink subframe proportional configurations that have been specified in 3GPP.
- the second configuration parameter determined according to the historical first configuration parameter can be directly applied to the second type communication device, for some practical needs, it is sometimes necessary to use the associated configuration parameter corresponding to the second configuration parameter (by setting multiple presets)
- the association between configuration parameters) is applied to the second type of communication device.
- the association relationship may not be set in advance.
- the second configuration parameter obtained in real time may be directly calculated by a specific algorithm to obtain an associated configuration parameter that needs to be applied to the second type of communication device.
- the parameter application unit includes: a signaling transmission subunit, configured to send reconfiguration signaling to the first type of communication device, to notify the first type of communication device in a next reconfiguration period. Applying the first configuration parameter.
- the first type of communication device can know the configuration parameters that need to be applied by itself.
- each of the uplink and downlink subframe ratios corresponds to different parameters, and the parameter may be indicated in the reconfiguration signaling to represent the corresponding uplink and downlink subframe ratio.
- the reconfiguration signaling here may be the newly proposed signaling that is not in the R10/1 1 or other current version of the protocol, or may add new information in the existing signaling.
- the corresponding second type of configuration parameter can be notified by a system message (such as SIB 1 ).
- the signaling transmission subunit transmits the reconfiguration signaling by physical downlink control channel signaling, medium access control signaling, or radio resource control protocol signaling.
- the parameter application unit further includes a signaling generation subunit, configured to: when the reconfiguration signaling is physical downlink control channel signaling, in the physical downlink control channel signaling Adding a first configuration indication field to the control information, where the first configuration indication field includes information of the first configuration parameter; when the reconfiguration signaling is medium access control signaling, the medium access control signaling Adding a control element, where the control element includes information of the first configuration parameter; when the reconfiguration signaling is RRC signaling, adding a second configuration indication to the RRC signaling The domain or the new radio resource control protocol layer signaling is added, and the second configuration indication field or the new radio resource control protocol layer signaling includes the information of the first configuration parameter.
- a signaling generation subunit configured to: when the reconfiguration signaling is physical downlink control channel signaling, in the physical downlink control channel signaling Adding a first configuration indication field to the control information, where the first configuration indication field includes information of the first configuration parameter; when the reconfiguration signaling is medium access control signaling, the medium access control signaling Adding
- a domain may be added to the control information (DCI, Downlink Control Information) carried by the downlink control channel (PDCCH) to indicate the matching configuration used in the next reconfiguration period.
- DCI Downlink Control Information
- it can be a 3-bit "TDD Config Indicator” field
- MAC medium access control
- CE MAC layer control element
- RRC Radio Resource Control
- the "addition" here refers to the current R10/1 1 (or other versions of the protocol prior to R12), including the use of reserved bits/domains currently in PDCCH, MAC or RRC. Either a new bit/field is added so that it can be used for information containing the first configuration parameters proposed in the present invention.
- the method further includes: a direction determining unit, configured to: after applying the second configuration parameter to the second type of communication device (ie, the second type of communication device application system message (such as SIB 1 After the TDD uplink and downlink subframe ratio configuration parameter), obtaining an actual transmission direction of each subframe of the second type of communication device; and a behavior limiting unit, configured to: in the actual transmission direction of the specified subframe In a case where the nominal transmission direction corresponding to the TDD uplink and downlink subframe proportion configuration parameter (ie, the second configuration parameter) in the system message (ie, SIB1) is inconsistent, the specified subframe is restricted to correspond to the nominal transmission direction. Operational function.
- the uplink/downlink subframe corresponding to the TDD uplink-downlink subframe proportion configuration parameter originally in the system message may actually become the downlink when applied to the second type communication device.
- / Uplink subframe resulting in a backward compatibility issue for the second type of communication device. Therefore, in the case of the above problem, by limiting These subframes originally correspond to the uplink/downlink operation functions, avoiding erroneous data transmission or reception due to changes in the subframe transmission direction, and enhancing backward compatibility for the second type of communication device.
- the behavior limiting unit restricting the data transmission behavior includes: when an actual transmission direction of a specified uplink subframe of the second type communication device When in the downlink direction, the behavior limiting unit prohibits the specified uplink subframe from invoking uplink data of the second type of communication device; and/or when the actual transmission direction of the specified downlink subframe of the second type of communication device is In the uplink direction, the behavior limiting unit prohibits the specified downlink subframe from invoking downlink data of the second type of communication device.
- the behavior limiting unit limiting the measurement behavior includes: ignoring the measurement result of the downlink subframe upload in which the actual transmission direction is the uplink direction, and The transmission direction is the latest measurement result of the downlink subframe in the downlink direction or the result of the combination of the most recent measurement results as the current measurement result; and/or the second type of communication device is limited only to the sequence number 0, 1 Performing downlink measurement at subframes of 5, 6; and/or setting a downlink subframe whose actual transmission direction is an uplink direction to a subframe without measurement behavior; and/or transmitting a disable measurement signaling to prohibit the second The downlink communication of the class communication device at the downlink subframe in the uplink direction is actually measured.
- the "merging processing result" of multiple measurement results can be understood as processing multiple measurement results according to a preset algorithm, such as calculating an average value of multiple measurement results, or multiplying different measurement results by different After the weights are summed and so on.
- the subframes with the sequence numbers 0, 1, 5, and 6 are the specified downlink subframes, and will not change to the uplink subframes in the uplink and downlink subframe configuration, so that the backward compatibility problem is not caused.
- MBSFN subframes Multicast/Broadcast over Single Frequency Network
- ABS subframes Almost Blank Subframe
- the frame will not continue to perform downstream measurements and will not cause backward compatibility issues.
- the method of prohibiting measurement signaling may limit the downlink measurement by using Time Domain Measurement resource restriction (LTE) defined by LTE.
- LTE Time Domain Measurement resource restriction
- the step of limiting the transmission/reception behavior of the signaling/channel by the behavior limiting unit comprises: When the actual transmission direction of the designated uplink subframe of the second type of communication device is the downlink direction, the specified uplink subframe is prohibited from transmitting signaling/channel uplink; and/or the second type of communication device is restricted only to the sequence number 2 Performing uplink transmission of the specified signaling/channel at the subframe; and/or limiting the second type of communication device to perform downlink reception of the specified signaling/channel only at subframes of sequence numbers 0, 1, 5, 6.
- the subframes with sequence number 2 are all uplink subframes, and the subframes with sequence numbers 0, 1, 5, and 6 are all downlink subframes. Therefore, by specifying only subframes 2 Performing the uplink operation and performing the downlink operation only in the subframes 0, 1, 5, and 6 can effectively avoid errors caused by the change of the subframe transmission direction.
- the method further includes: an information acquiring unit, configured to acquire feature information of the first type of communication device or the second type of communication device; and a function switching unit, configured to be used in the feature information
- the elMTA function is enabled if the value is greater than or equal to the preset value, otherwise the elMTA function is disabled.
- the elMTA function can be automatically switched according to the actual situation, thereby avoiding performance loss and inconvenience caused by the manual switch.
- the feature information includes at least one of the following or a combination thereof: the total number of the first type of communication device or the second type of communication device, the first type of communication device or The number of communication devices in an active state in the second type of communication device, the to-be-sent data corresponding to the first type of communication device or the second type of communication device.
- the method further includes: a message management unit, configured to: when the system message (such as SIB1), the TDD uplink and downlink subframe proportion configuration parameter (that is, the second configuration parameter) and the second class When the configuration parameters of the current reconfiguration period are different, the communication device is prohibited from notifying the first type of communication device of the TDD uplink and downlink subframe proportion configuration parameter in the system message (ie, SIB 1 ).
- SIB1 system message
- SIB 1 the TDD uplink and downlink subframe proportion configuration parameter
- the new version of the UE can be prevented from receiving multiple configuration parameters at the same time, so that the uplink and downlink can be correctly implemented.
- the configuration of the sub-frame ratio is not limited to:
- the behavior limiting unit restricting the data transmission behavior includes: when an actual transmission direction of a specified uplink subframe of the second type communication device When the downlink direction is the downlink direction, the behavior limiting unit prohibits the specified uplink subframe from invoking uplink data of the second type of communication device; or when the actual transmission direction of the specified downlink subframe of the second type communication device is an uplink direction And the behavior limiting unit prohibits the specified downlink subframe from invoking downlink data of the second type of communication device.
- a system including a first type of communication device supporting elMTA function and
- the first type of communication device is a new version of the UE (that is, the UE has and has the elMTA function enabled), and the second type of communication device may be the old version of the UE (ie, the UE does not have the elMTA function), or For the new version of the UE (that is, the UE has but not enabled the elMTA function).
- dynamic configuration of time-division duplex uplink-downlink subframe ratios is implemented by using different configuration parameters, which avoids sacrificing the performance of the old version UE when using the short re-matching period, or sacrificing the new version when using the long re-matching period.
- UE performance through the dual-cycle application, enables the performance of both types of UEs to be balanced, fully demonstrating the gain of dynamic configuration on the overall performance of the system.
- the configuration parameter refers to a certain uplink and downlink subframe ratio selected therefrom.
- a communication device supports an elMTA function
- the communication device includes: a data interaction unit, configured to receive a first configuration for configuring a time division duplex uplink and downlink subframe ratio a data processing unit, configured to apply the first configuration parameter in a first reconfiguration period; a message ignoring unit, configured to ignore the second configuration parameter when the data interaction unit receives the second configuration parameter, The second configuration parameter is used to prevent the data processing unit from applying the second configuration parameter; wherein the second configuration parameter is used to configure a time division duplex uplink and downlink subframe ratio of the communication device that does not support the eMTTA function, so that the elMTA is not supported by the
- the functional communication device applies the second configuration parameter during a second reconfiguration period.
- the parameter of the system information such as SIB1
- SIB1 such as the downlink subframe proportion configuration parameter
- all the UEs need to be notified by using paging (paging message).
- the UE applies the received changed parameters, so when the TDD uplink and downlink subframe proportion configuration parameters in the system message change, it will be sent to all UEs, so that the new version of the UE receives both the first configuration parameter and receives
- the TDD uplink and downlink subframe ratio configuration parameters in the updated system message cause it to be processed incorrectly. Therefore, the new version UE actively ignores the TDD uplink-downlink subframe proportion configuration parameter in the received system message, thereby avoiding receiving multiple configuration parameters at the same time, so that the uplink and downlink subframes can be correctly implemented. Proportional configuration.
- FIG. 1 is a schematic structural view of a TDD system in the related art
- FIG. 2 is a schematic structural diagram of seven radio frames in a TDD system defined in the related art
- FIG. 3 is a flowchart showing a two-cycle dynamic configuration method of TDD uplink and downlink subframe proportion configuration parameters according to an embodiment of the present invention
- FIG. 4 shows a block diagram of a base station in accordance with an embodiment of the present invention
- Figure 5 shows a block diagram of a system in accordance with an embodiment of the present invention
- Figure 6 shows a block diagram of a communication device in accordance with an embodiment of the present invention
- FIG. 7 shows a flow chart for obtaining reconfiguration configuration parameters for different types of communication devices by statistical algorithms, in accordance with an embodiment of the present invention
- FIG. 8 is a schematic structural diagram of a radio frame configured by time-division duplex uplink-downlink subframe ratio in the related art
- FIG. 9 is a diagram showing data transmission and/or strategy for an old version UE according to an embodiment of the present invention. Flow chart of behavioral restrictions;
- Figure 10 shows a flow chart of the automatic switch elMTA function in accordance with an embodiment of the present invention. detailed description
- FIG. 3 is a flow chart showing a two-cycle dynamic configuration method for TDD uplink and downlink subframe ratios according to an embodiment of the present invention.
- a dual-cycle dynamic configuration method for TDD uplink-downlink subframe ratio is used for a first type communication device supporting an elMTA function and a second type communication device not supporting an elMTA function.
- the configuration of the time division duplex uplink-downlink subframe ratio includes: Step 302: Determine a first configuration parameter that needs to be applied to a time division duplex uplink and downlink subframe ratio of the first type of communication device; Step 304, Determining a corresponding second configuration parameter by using one or more historical first configuration parameters used by the first type of communication device; Step 306, applying the first configuration parameter to the first class in a first reconfiguration period a communication device, and applying the second configuration parameter to the second type of communication device in a second reconfiguration period.
- the first type of communication device is a new version of the UE (that is, the UE has and has the elMTA function enabled), and the second type of communication device may be the old version of the UE (ie, the UE does not have the elMTA function), or For the new version of the UE (that is, the UE has but not enabled the elMTA function).
- the "reconfiguration period" is a predefined period. In each reconfiguration period, the system selects one of the above seven radio frame structures for the ratio of the uplink and downlink subframes, so that in the next reconfiguration period, the system will The uplink and downlink subframe ratios are applied to the corresponding UEs.
- the scheme implements the dynamic configuration of the time-division duplex uplink-downlink subframe ratio by adopting different configuration parameters for different types of communication devices, and avoids sacrificing the performance of the old version UE when using the short reconfiguration period, or when using the long reconfiguration period. Sacrificing the performance of the new version of the UE, the performance of the two types of UE can be balanced through the application of the dual-cycle, which fully reflects the gain of the dynamic configuration on the overall performance of the system.
- the configuration parameter refers to a certain uplink and downlink subframe ratio selected therefrom.
- the "historical first configuration parameter” refers to a configuration parameter applied to the first type of communication device in the current reconfiguration period and the previous reconfiguration period. Of course, it may also be set to include the current acquisition. Take the first configuration parameter.
- the determining the corresponding second configuration parameter comprises: using, as the second configuration parameter, a configuration parameter that is used most frequently by the first type of communication device in a specified time window; Or using, as the second configuration parameter, a configuration parameter that uses the least number of uplink or downlink subframes in the configuration parameter used by the first type of communication device in the specified time window; or the first type of communication device is a configuration parameter that has the largest number of uplink or downlink subframes in the configuration parameter used in the specified time window as the second configuration parameter; or a configuration parameter used by the first type of communication device in a most recent reconfiguration period As the second configuration parameter; or a configuration parameter used by the first type of communication device in a current reconfiguration period as the second configuration parameter.
- the first configuration parameter required by the first type of communication device can be obtained by using a related technology, for example, the total amount of uplink data to be sent of all the first type of communication devices and the to-be-sent data to be sent by the base station.
- the ratio of the total amount, and according to the ratio of the to-be-sent data find the configuration closest to the seven TDD uplink and downlink subframe ratio configurations specified in the 3GPP protocol, and use this configuration as the TDD uplink and downlink to be used in the next matching period.
- Subframe ratio configuration For the second configuration parameter, it can be selected in different ways according to actual needs or actual conditions. Of course, it should be understood by those skilled in the art that, besides the various modes already mentioned in the above scheme, it is obvious that the first configuration parameter or the first selection for the next reconfiguration period can be selected in other unmentioned manners.
- the method before the step of determining the corresponding second configuration parameter, the method further includes: presetting at least one associated configuration parameter for each protocol definition configuration parameter; and corresponding to the second in the determining After the step of configuring the parameter, the method further includes: acquiring the associated configuration parameter corresponding to the second configuration parameter, and replacing the second configuration parameter by the associated configuration parameter, to apply the associated configuration parameter to the The second type of communication device.
- the protocol definition configuration parameter refers to seven different uplink and downlink subframe proportional configurations that have been specified in 3GPP.
- the second configuration parameter determined according to the historical first configuration parameter can be directly applied to the second type communication device, for some practical needs, it is sometimes necessary to use the associated configuration parameter corresponding to the second configuration parameter (by setting multiple presets)
- the association between configuration parameters) is applied to the second type of communication device.
- the association relationship may not be set in advance.
- the second configuration parameter obtained in real time may be directly calculated by a specific algorithm to obtain an associated configuration parameter that needs to be applied to the second type of communication device.
- the step of applying the first configuration parameter to the first type of communication device comprises: sending reconfiguration signaling to the first type of communication device, to notify the first The class communication device applies the first configuration parameter in a next reconfiguration period.
- the first type of communication device can know the configuration parameters that need to be applied by itself.
- each of the uplink and downlink subframe ratios corresponds to different parameters, and the parameter may be indicated in the reconfiguration signaling to represent the corresponding uplink and downlink subframe ratio.
- the reconfiguration signaling here may be the newly proposed signaling that is not in the R10/1 1 or other current version of the protocol, or may add new information in the existing signaling.
- the corresponding second type of configuration parameter can be notified by a system message (such as SIB 1 ).
- the reconfiguration signaling includes: physical downlink control channel signaling, medium access control signaling, or radio resource control protocol signaling.
- the first configuration indication field is added to the control information of the physical downlink control channel signaling, where the first configuration indication is added, when the reconfiguration signaling is the physical downlink control channel signaling.
- the domain includes the information of the first configuration parameter; when the reconfiguration signaling is the medium access control signaling, adding a control element to the medium access control signaling, where the control element includes the first configuration.
- the second configuration indication field or the new RRC layer signaling includes information about the first configuration parameter.
- a field may be added in the control information (DCI, Downlink Control Information) carried by the downlink control channel (PDCCH) to indicate the matching used in the next reconfiguration period.
- DCI Downlink Control Information
- the configuration may be a 3-bit "TDD Config Indicator”field; for medium access control (MAC) signaling, a special MAC layer control element (CE) may be added; for radio resources Control Protocol (RRC, Radio Resource Control) signaling, which can add a new information field in the relevant signaling of the RRC layer (such as "RRC Connection Reconfiguration” signaling) (such as calling this information field "TDD Config Indicator” Or add a new RRC layer signaling.
- RRC Radio Resource Control
- the "addition" here refers to the current R10/1 1 (or other versions of the protocol prior to R12), including the use of reserved bits/domains currently in PDCCH, MAC or RRC. Either a new bit/field is added so that it can be used for information containing the first configuration parameters proposed in the present invention.
- the method further includes: obtaining an actual transmission direction of each subframe of the second type of communication device; if the actual transmission direction of the subframe is specified, and the TDD uplink and downlink in the system message (ie, SIB1) If the nominal transmission direction of the frame ratio configuration parameter (ie, the second configuration parameter) is inconsistent, the operation function corresponding to the nominal transmission direction on the designated subframe is restricted.
- the uplink/downlink subframe corresponding to the TDD uplink-downlink subframe proportion configuration parameter originally in the system message may actually become the downlink when applied to the second type communication device.
- / Uplink subframe resulting in a backward compatibility issue for the second type of communication device. Therefore, in the case where the above problem occurs, by restricting the operation functions of the subframes originally corresponding to the uplink/downlink, the erroneous data transmission or reception due to the change of the subframe transmission direction is avoided, and the second type of communication device is enhanced. Backward compatibility.
- the step of limiting the data transmission behavior includes: when an actual transmission direction of the specified uplink subframe of the second type communication device is a downlink direction
- the specified uplink subframe is prohibited from invoking uplink data of the second type of communication device; and/or when the actual transmission direction of the specified downlink subframe of the second type communication device is an uplink direction, the designation is prohibited.
- the downlink subframe invokes downlink data of the second type of communication device.
- the step of limiting the measurement behavior comprises: uploading a measurement result of an actual transmission direction to a downlink subframe in an uplink direction, and the actual transmission direction is The result of the combination of the last measurement result of the downlink subframe in the downlink direction or the result of the combination of the most recent measurement results as the current measurement result; and/or limiting the second type of communication device only in the sequence number 0, 1, 5, Performing downlink measurement at a subframe of 6; and/or setting a downlink subframe whose actual transmission direction is an uplink direction to a subframe having no measurement behavior; and/or transmitting a disable measurement signaling to prohibit the second type of communication device The downlink measurement at the downlink subframe in which the actual transmission direction is the uplink direction.
- the "merging processing result" of multiple measurement results can be understood as processing multiple measurement results according to a preset algorithm, such as calculating an average value of multiple measurement results, or multiplying different measurement results by different After the weights are summed and so on.
- the subframes with the sequence numbers 0, 1, 5, and 6 are the specified downlink subframes, and will not change to the uplink subframes in the uplink and downlink subframe configuration, so that the backward compatibility problem is not caused.
- MBSFN subframes Multicast/Broadcast over Single Frequency Network
- ABS subframes Almost Blank Subframe
- the frame will not continue to perform downstream measurements and will not cause backward compatibility issues.
- the method of prohibiting measurement signaling may limit the downlink measurement by using Time Domain Measurement resource restriction (LTE) defined by LTE.
- LTE Time Domain Measurement resource restriction
- the step of limiting the signaling or channel transmission or reception behavior comprises: when the second type communication device When the actual transmission direction of the specified uplink subframe is the downlink direction, the specified uplink subframe is prohibited from transmitting signaling/channel uplink; and/or the second type of communication device is restricted to be specified only in the subframe with sequence number 2 Uplinking of signaling/channel; and/or limiting the second type of communication
- the downlink reception of the specified signaling/channel is performed only at the subframes with sequence numbers 0, 1, 5, and 6.
- the subframes with sequence number 2 are all uplink subframes, and the subframes with sequence numbers 0, 1, 5, and 6 are all downlink subframes. Therefore, by specifying only subframes 2 Performing the uplink operation and performing the downlink operation only in the subframes 0, 1, 5, and 6 can effectively avoid errors caused by the change of the subframe transmission direction.
- the method further includes: acquiring feature information of the first type of communication device or the second type of communication device; and when the value of the feature information is greater than or equal to a preset threshold, The elMTA function is described, otherwise the elMTA function is turned off.
- the elMTA function can be automatically switched according to the actual situation, thereby avoiding performance loss and inconvenience caused by the manual switch.
- the feature information includes at least one of the following or a combination thereof: the total number of the first type of communication device or the second type of communication device, the first type of communication device or The number of communication devices in an active state in the second type of communication device, the amount of data to be sent corresponding to the first type of communication device or the second type of communication device, and all communication devices in which the total number is within a specified range
- the proportion of the quantity, the proportion of the number of active devices in the specified range, the total number of communication devices in the specified range, and all the pending data within the specified range The proportion of the quantity.
- the method further includes: when the TDD uplink and downlink subframe proportion configuration parameter (ie, the second configuration parameter) in the system message (such as SIB 1 ) and the second type of communication device are currently heavy
- the TDD uplink and downlink subframe proportion configuration parameter in the system message ie, SIB 1
- SIB 1 the TDD uplink and downlink subframe proportion configuration parameter in the system message
- the new version of the UE can be prevented from receiving multiple configuration parameters at the same time, so that the TDD can be correctly implemented. Configuration of the line subframe proportion configuration parameter.
- the step of limiting the data transmission behavior includes: when an actual transmission direction of the specified uplink subframe of the second type communication device is a downlink direction
- the specified uplink subframe is prohibited from invoking uplink data of the second type of communication device, or when the actual transmission direction of the specified downlink subframe of the second type communication device is an uplink direction, the designated downlink is prohibited.
- the frame invokes downlink data of the second type of communication device.
- Figure 4 shows a block diagram of a base station in accordance with an embodiment of the present invention.
- the base station 400 serves a first type of communication device supporting an elMTA function and a second type communication device not supporting an elMTA function
- the base station 400 includes: a determining unit 402, configured to determine a first configuration parameter that needs to be applied to a time division duplex uplink and downlink subframe ratio of the first type of communication device, and according to one or more historical first configurations used by the first type of communication device a parameter, the corresponding second configuration parameter is determined
- the parameter application unit 404 is configured to apply the first configuration parameter to the first type of communication device in a first reconfiguration period, and the second configuration parameter is in a A double reconfiguration period is applied to the second type of communication device.
- the first type of communication device is a new version of the UE (that is, the UE has and has the elMTA function enabled), and the second type of communication device may be the old version of the UE (ie, the UE does not have the elMTA function), or For the new version of the UE (that is, the UE has but not enabled the elMTA function).
- the "redistribution cycle" is a predefined cycle, at each weight In the matching period, the system selects one uplink and downlink subframe ratio among the above seven radio frame structures, so that the system applies the uplink and downlink subframe ratio to the corresponding UE in the next reconfiguration period.
- the scheme implements the dynamic configuration of the time-division duplex uplink-downlink subframe ratio by adopting different configuration parameters for different types of communication devices, and avoids sacrificing the performance of the old version UE when using the short reconfiguration period, or when using the long reconfiguration period. Sacrificing the performance of the new version of the UE, the performance of the two types of UE can be balanced through the application of the dual-cycle, which fully reflects the gain of the dynamic configuration on the overall performance of the system.
- the configuration parameter refers to a certain uplink and downlink subframe ratio selected therefrom.
- the "historical first configuration parameter" refers to the configuration parameter applied to the first type of communication device in the current reconfiguration period and the previous reconfiguration period. Of course, it may also be set to include the currently acquired first configuration parameter.
- the parameter determining unit 402 uses the configuration parameter that is used most frequently by the first type of communication device in a specified time window, and the first type of communication device is within the specified time window. a configuration parameter having the smallest number of uplink or downlink subframes in the used configuration parameter, a configuration parameter in which the number of uplink or downlink subframes is the largest among the configuration parameters used by the first type of communication device in the specified time window, The configuration parameters used by the first type of communication device during the most recent reconfiguration period or the configuration parameters used by the first type of communication device during the current reconfiguration period are used as the second configuration parameter.
- the first configuration parameter required by the first type of communication device can be obtained by using a related technology, for example, the total amount of uplink data to be sent of all the first type of communication devices and the to-be-sent data to be sent by the base station.
- the ratio of the total amount, and according to the ratio of the to-be-sent data find the configuration closest to the seven TDD uplink and downlink subframe ratio configurations specified in the 3GPP protocol, and use this configuration as the TDD uplink and downlink to be used in the next matching period.
- Subframe ratio configuration For the second configuration parameter, it can be selected in different ways according to actual needs or actual conditions. Of course, it should be understood by those skilled in the art that, besides the various modes already mentioned in the above scheme, it is obvious that the first configuration parameter or the first selection for the next reconfiguration period can be selected in other unmentioned manners.
- the method further includes: an association setting unit 406, configured to preset at least one associated configuration parameter for each protocol definition configuration parameter; wherein the parameter determination unit 402 further acquires the second Configuring the associated configuration parameter of the parameter, and replacing the second configuration parameter with the associated configuration parameter to apply the associated configuration parameter to the second type of communication device.
- the protocol definition configuration parameter refers to seven different uplink and downlink subframe proportional configurations that have been specified in 3GPP.
- the second configuration parameter determined according to the historical first configuration parameter can be directly applied to the second type communication device, for some practical needs, it is sometimes necessary to use the associated configuration parameter corresponding to the second configuration parameter (by setting multiple presets)
- the association between configuration parameters) is applied to the second type of communication device.
- the association relationship may not be set in advance.
- the second configuration parameter obtained in real time may be directly calculated by a specific algorithm to obtain an associated configuration parameter that needs to be applied to the second type of communication device.
- the parameter application unit 404 includes: a signaling transmission subunit 4042, configured to send reconfiguration signaling to the first type of communication device, to notify the first type of communication device that the next The first configuration parameter is applied in a matching period.
- the first type of communication device can know the configuration parameters that need to be applied by itself.
- each of the uplink and downlink subframe ratios corresponds to different parameters, and the parameter may be indicated in the reconfiguration signaling to represent the corresponding uplink and downlink subframe ratio.
- the reconfiguration signaling here may be the newly proposed signaling that is not in the R10/1 1 or other current version of the protocol, or may add new information in the existing signaling.
- the corresponding second type of configuration parameter can be notified by a system message (such as SIB 1 ).
- the signaling transmission subunit 4042 transmits the reconfiguration signaling by using physical downlink control channel signaling, media access control signaling, or radio resource control protocol signaling.
- the parameter application unit 404 further includes a signaling generation subunit 4044, configured to: when the reconfiguration signaling is physical downlink control channel signaling, in the physical downlink control channel signal Control information Adding a first configuration indication field, where the first configuration indication field includes information of the first configuration parameter; when the reconfiguration signaling is medium access control signaling, adding in the medium access control signaling a control element, the control element includes information of the first configuration parameter; when the reconfiguration signaling is radio resource control protocol signaling, adding a second configuration indication field to the radio resource control protocol signaling or A new radio resource control protocol layer signaling is added, where the second configuration indication field or the new radio resource control protocol layer signaling includes information of the first configuration parameter.
- a signaling generation subunit 4044 configured to: when the reconfiguration signaling is physical downlink control channel signaling, in the physical downlink control channel signal Control information Adding a first configuration indication field, where the first configuration indication field includes information of the first configuration parameter; when the reconfiguration signaling is medium access control signaling, adding in the medium access control signal
- a domain may be added to the control information (DCI, Downlink Control Information) carried by the downlink control channel (PDCCH) to indicate the matching configuration used in the next reconfiguration period.
- DCI Downlink Control Information
- it can be a 3-bit "TDD Config Indicator” field
- MAC medium access control
- CE MAC layer control element
- RRC Radio Resource Control
- the "addition" here refers to the current R10/1 1 (or other versions of the protocol prior to R12), including the use of reserved bits/domains currently in PDCCH, MAC or RRC. Either a new bit/field is added so that it can be used for information containing the first configuration parameters proposed in the present invention.
- the method further includes: a direction determining unit 408, configured to: after applying the second configuration parameter to the second type of communication device (ie, the second type of communication device application system message (such as SIB) After the TDD uplink and downlink subframe ratio configuration parameter is used, the actual transmission direction of each subframe of the second type of communication device is obtained; the behavior limiting unit 410 is configured to use the actual transmission direction of the specified subframe.
- the nominal transmission direction corresponding to the TDD uplink and downlink subframe proportion configuration parameter (ie, the second configuration parameter) in the system message (ie, SIB 1 ) is inconsistent, the specified subframe is restricted to correspond to the nominal Operational function of the transmission direction.
- the uplink/downlink subframe corresponding to the TDD uplink-downlink subframe proportion configuration parameter originally in the system message may actually become the downlink when applied to the second type communication device.
- / Uplink subframe resulting in a backward compatibility issue for the second type of communication device. Therefore, in the case where the above problem occurs, by restricting the operation functions of the subframes originally corresponding to the uplink/downlink, the erroneous data transmission or reception due to the change of the subframe transmission direction is avoided, and the second type of communication device is enhanced. Backward compatibility.
- the behavior limiting unit 410 limits the data transmission behavior to include: when the actual transmission of the specified uplink subframe of the second type communication device When the direction is the downlink direction, the behavior limiting unit prohibits the uplink data of the second type of communication device from being invoked by the specified uplink subframe; and/or the actual transmission direction of the specified downlink subframe of the second type of communication device When the uplink direction is in the uplink direction, the behavior limiting unit prohibits the specified downlink subframe from invoking downlink data of the second type of communication device.
- the behavior limiting unit 410 limits the measurement behavior to: ignoring the measurement result of the downlink subframe upload in which the actual transmission direction is the uplink direction, and The actual transmission direction is the latest measurement result of the downlink subframe in the downlink direction or the result of the combination of the most recent measurement results as the current measurement result; and/or the second type of communication device is limited to only the sequence number is 0.
- the second type of communication device performs downlink measurement at the downlink subframe in the uplink direction in the actual transmission direction.
- the "merging processing result" of multiple measurement results can be understood as processing multiple measurement results according to a preset algorithm, such as calculating an average value of multiple measurement results, or multiplying different measurement results by different After the weights are summed and so on.
- the subframes with the sequence numbers 0, 1, 5, and 6 are the specified downlink subframes, and will not change to the uplink in the uplink and downlink subframe configuration. Subframes, which do not cause backward compatibility issues. By setting some subframes to subframes without measurement behavior, such as MBSFN subframes (Multicast/Broadcast over Single Frequency Network) or ABS subframes (Almost Blank Subframe), these sub-frames The frame will not continue to perform downstream measurements and will not cause backward compatibility issues.
- the method of prohibiting measurement signaling may limit the downlink measurement by using the time domain measurement resource restriction (LTE) defined by the LTE.
- LTE time domain measurement resource restriction
- the step of limiting the transmission/reception behavior of the signaling/channel by the behavior limiting unit comprises: When the actual transmission direction of the designated uplink subframe of the second type of communication device is the downlink direction, the specified uplink subframe is prohibited from transmitting signaling/channel uplink; and/or the second type of communication device is restricted only to the sequence number 2 Performing uplink transmission of the specified signaling/channel at the subframe; and/or limiting the second type of communication device to perform downlink reception of the specified signaling/channel only at subframes of sequence numbers 0, 1, 5, 6.
- the subframes with sequence number 2 are all uplink subframes, and the subframes with sequence numbers 0, 1, 5, and 6 are all downlink subframes. Therefore, by specifying only subframes 2 Performing the uplink operation and performing the downlink operation only in the subframes 0, 1, 5, and 6 can effectively avoid errors caused by the change of the subframe transmission direction.
- the method further includes: an information acquiring unit 412, configured to acquire feature information of the first type of communication device or the second type of communication device; and a function switching unit 414, configured to: The elMTA function is turned on if the value of the information is greater than or equal to the preset threshold, otherwise the elMTA function is turned off.
- the elMTA function can be automatically switched according to the actual situation, thereby avoiding performance loss and inconvenience caused by the manual switch.
- the feature information includes at least one of the following or a combination thereof: the total number of the first type of communication device or the second type of communication device, the first type of communication device or The number of communication devices in an active state in the second type of communication device, the amount of data to be sent corresponding to the first type of communication device or the second type of communication device, and all communication devices in which the total number is within a specified range
- the proportion of the quantity, the proportion of the number of active devices in the specified range, the total number of communication devices in the specified range, and all the pending data within the specified range The proportion of the quantity.
- the method further includes: a message management unit 416, configured to: when the TDD uplink and downlink subframe proportion configuration parameter (ie, the second configuration parameter) in the system message (such as SIB 1 ) When the configuration parameters of the current reconfiguration period are different, the parameter application unit 404 is prohibited from notifying the first type of communication device of the TDD uplink and downlink subframe proportion configuration in the system message (ie, SIB 1 ). parameter.
- a message management unit 416 configured to: when the TDD uplink and downlink subframe proportion configuration parameter (ie, the second configuration parameter) in the system message (such as SIB 1 )
- SIB 1 system message
- the new version of the UE can be prevented from receiving multiple configuration parameters at the same time, so that the uplink and downlink can be correctly implemented.
- the configuration of the sub-frame ratio is not limited to:
- the behavior limiting unit 410 limits the data transmission behavior to include: when the actual transmission of the specified uplink subframe of the second type communication device When the direction is the downlink direction, the behavior limiting unit 410 prohibits the specified uplink subframe from invoking uplink data of the second type of communication device; or when the actual transmission direction of the specified downlink subframe of the second type communication device is In the uplink direction, the behavior limiting unit 410 prohibits the specified downlink subframe from invoking downlink data of the second type of communication device.
- FIG. 5 shows a block diagram of a system in accordance with an embodiment of the present invention.
- a system 500 according to an embodiment of the present invention includes a terminal 502 and a base station 400 as shown in FIG. 4, wherein the terminal 502 includes a first type of communication device supporting the elMTA function and/or does not support the elMTA function.
- the second type of communication device is not limited to a system 500 according to an embodiment of the present invention.
- the first type of communication device is a new version of the UE (that is, the UE has and has the elMTA function enabled), and the second type of communication device may be the old version of the UE (ie, the UE does not have the elMTA function), or For the new version of the UE (that is, the UE has but not enabled the elMTA function).
- dynamic configuration of time-division duplex uplink-downlink subframe ratios is implemented by using different configuration parameters, which avoids sacrificing the performance of the old version UE when using the short re-matching period, or sacrificing the new version when using the long re-matching period.
- UE performance through the dual-cycle application, enables the performance of both types of UEs to be balanced, fully demonstrating the gain of dynamic configuration on the overall performance of the system.
- the configuration parameter refers to a certain uplink and downlink subframe ratio selected therefrom.
- Figure 6 shows a block diagram of a communication device in accordance with an embodiment of the present invention.
- a communication device 600 supports an elMTA function
- the communication device 600 includes: a data interaction unit 602, configured to configure a time division duplex uplink and downlink subframe ratio a first configuration parameter; the data processing unit 604 is configured to apply the first configuration parameter in a first reconfiguration period; the message ignoring unit 606 is configured to: when the data interaction unit 602 receives the second configuration parameter, ignore The second configuration parameter is used to prohibit the data processing unit 604 from applying the second configuration parameter; wherein the second configuration parameter is used to configure a time division duplex uplink and downlink subframe ratio of a communication device that does not support the eMTTA function. And applying the second configuration parameter in a second reconfiguration period by the communication device not supporting the elMTA function.
- the parameter of the system information such as SIB1
- SIB1 such as the downlink subframe proportion configuration parameter
- all the UEs need to be notified by using paging (paging message).
- the UE applies the received changed parameters, so when the TDD uplink and downlink subframe proportion configuration parameters in the system message change, it will be sent to all UEs, so that the new version of the UE receives both the first configuration parameter and receives
- the TDD uplink and downlink subframe ratio configuration parameters in the updated system message cause it to be processed incorrectly. Therefore, the new version UE actively ignores the TDD uplink-downlink subframe proportion configuration parameter in the received system message, thereby avoiding receiving multiple configuration parameters at the same time, so that the uplink and downlink subframes can be correctly implemented. Proportional configuration.
- the new version of the UE with the elMTA function enabled is called “advanced UE”, and the old version UE and the new version UE without the elMTA function are called “Legacy UE”.
- “Advanced UE” and “Legacy UE” are applicable to reconfiguration periods of different lengths: “Advanced UE” can dynamically reconfigure the proportion of TDD uplink and downlink subframes according to the newly defined reconfiguration signaling. (The reconfiguration period can be less than 10ms); “Legacy UE” can only achieve the dynamic reconfiguration of the TDD uplink and downlink subframe ratio by updating the "system information" with a long period.
- the "statistical algorithm" can be proposed by the present invention to implement reconfiguration periods of different lengths for different user groups, wherein FIG. 7 shows that different types of communication are obtained by statistical algorithms according to an embodiment of the present invention. Flowchart of the reconfiguration configuration parameters of the device.
- the specific implementation process of the "statistical algorithm” includes:
- Step 702 triggering a user grouping. That is, according to the protocol version of the user terminal, the user terminal is divided into “advanced UE group” and “Legacy UE group”, wherein “advanced UE group” includes all “advanced UEs” (refer to user terminal protocol support Rel-12 definition) ElMTA function, which can quickly and dynamically reconfigure TDD uplink and downlink subframe ratio configuration); “Legacy The UE group includes all the "Legacy UEs”.
- the user terminal protocol does not support the elMTA function defined by the Rel-12, and cannot dynamically reconfigure the TDD uplink and downlink subframe ratio configuration.
- the triggering of the user grouping can be triggered periodically. Can be an event trigger.
- Step 704 Obtain a matching configuration ii applied to the "advanced UE group", for example, in a range in which the base station performs dynamic adjustment (for example, in a cell), calculate the total amount of uplink data to be sent of all advanced UEs, and the base station to be delivered.
- the ratio of the total amount of data to be sent, and according to the ratio of the to-be-sent data find the configuration closest to the seven TDD uplink and downlink subframe ratios specified in the 3GPP protocol (as shown in FIG. 2), and use this configuration as the lower The ratio of the TDD uplink and downlink subframes to be used in a matching period.
- Step 706 applying configuration ii to the "advanced UE group", and returning to step 704 in each reconfiguration cycle to continuously acquire a new configuration ii.
- the base station may notify the terminal in the “advanced UE group” by reconfiguring the reconfiguration command.
- the reconfiguration signaling may be:
- Added PDCCH Physical Downlink Control Channel
- DCI control information
- Added MAC control signaling Add special MAC (Media Access Control) layer control element (CE);
- Step 708 after each acquisition configuration ii to be applied to the "advanced UE group" (obviously also at the same time or before it), by "advanced UE group” in history (current reconfiguration period and previous reconfiguration) Cycle)
- the used configuration is used for statistical operations to obtain configuration ii, and the matching configuration iii corresponding to configuration ii is found to be applied to the "Legacy UE Group".
- the method for obtaining configuration ii' includes:
- the matching configuration ii n with the most occurrences in a certain time window is used as the matching configuration ii' of "Legacy UE Group";
- Algorithm 2 within a certain time window, appeared uplink / downlink subframe ratio matched minimum (or maximum) disposed as matching ii ii n-Configuration "Legacy UE group",;
- the matching configuration ii n used in the most recent reconfiguration period of the "Advanced UE Group” is used as the matching configuration ii' of the "Legacy UE Group”.
- the configuration ii is pre-established with the configuration iii, so that the corresponding configuration iii can be directly found through the obtained configuration ii to be applied to the "Legacy UE group".
- Step 710 obtaining a matching configuration of "Legacy UE Group” iii.
- Step 712 applying configuration iii to the "Legacy UE Group", and returning to step 710 in each reconfiguration cycle to continuously acquire a new configuration iii.
- the performance of the Legacy UE is greatly improved. Since the matching configuration of the "Legacy UE Group” is obtained by the “advanced UE group” matching configuration statistics, the "Legacy UE Group” matching configuration iii according to the statistical algorithm is statistically consistent with the traffic load in the future period. Subframe ratio requirements. Therefore, the legacy UE is backward compatible due to changes in the transmission direction of the subframe (such as downlink (or uplink) subframes for Legacy UEs and actually uplink (or downlink) subframes). Sexual problems.
- each radio frame includes a special subframe 802, an uplink subframe 804, and a downlink subframe 806.
- the radio frame 2 is obtained after reconfiguration from the radio frame 1.
- the result corresponding to the matching configuration iii should be the structure shown in the upper part of FIG.
- the subframes of sequence numbers 3, 4, 8, and 9 are all downlink subframes 806, but the actual subframe structure is the structure shown in the lower half of FIG.
- the present invention proposes the solution shown in FIG. As shown in Figure 9, the solution includes:
- Step 902 applying configuration iii to the Legacy UE group.
- Step 904 Determine whether the actual transmission direction of each subframe is consistent with the ideal transmission direction corresponding to configuration iii. If they are consistent, no processing is performed, otherwise step 906 is entered.
- Step 906 Limit the sending or receiving behavior of the UE in the Legacy UE group, including:
- the uplink (and/or downlink) data is used by the scheduler at the base station side.
- the scheduling is restricted, and the uplink (and/or downlink) data of the legacy UE is scheduled to be scheduled in subframe #n.
- the base station ignores the measurement report result in the subframe #nn, and uses the most recent true before the subframe #nn
- the downlink subframe UE measurement result is used as the measurement result of the current measurement; or the combined prediction is performed using the latest real downlink subframe UE measurement results (for example, calculating an average value of multiple measurement results or weighting and summing), and The predicted result is the result of this UE measurement.
- the subframe #n is set as an MBSFN subframe (Multicast/Broadcast over Single Frequency Network) subframe or an ABS subframe (Almost Blank Subframe).
- MBSFN subframe Multicast/Broadcast over Single Frequency Network
- ABS subframe Almost Blank Subframe
- the UE-inhibited UE measurement signaling defined by the LTE to prohibit the downlink measurement of the UE at the subframe #n.
- the UE measurement is restricted by using the Time Domain Measurement resource restriction signaling defined by LTE.
- the uplink subframe If the actual transmission direction of the uplink subframe is the downlink direction, it restricts transmission/reception of some signaling (channel) that needs to be transmitted in the uplink or uplink, such as SRS (uplink channel sounding pilot), PRACH (physical random connection) Into the channel) and so on.
- SRS uplink channel sounding pilot
- PRACH physical random connection
- the signaling (channel) is only for the downlink subframe (or always for the uplink subframe).
- the frame is transmitted at the frame.
- the subframe #2 is an uplink subframe
- the subframes #0, 1, 5, and 6 are downlink subframes. Therefore, the signaling (channel) that needs to be received in the uplink or uplink may be configured to be uplinked or uplink received only in the subframe #2, and the signaling (channel) that needs to be transmitted in the downlink or downlink is configured only in the sub-frame.
- Frame #0, 1, 5, 6 is downlink or downlink.
- the present invention can also automatically determine and process whether to enable the elMTA function, as shown in FIG. 10, the processing flow includes:
- Step 1002 Collect user group information.
- the so-called “user group information” refers to the characteristic information that a "user group” has in common, for example:
- the proportion of the total amount of data to be sent in the user group to be sent within the TDD dynamic adjustment range (such as within a cell);
- the "user group” herein may refer to “advanced UE group” or “Legacy UE group”.
- Step 1004 it is assumed that the value of the collected feature information of the "user group” is A, and the preset threshold is B. If A is greater than or equal to B, then the process proceeds to step 1006, otherwise, the process proceeds to step 1008. Specifically, if the criterion A is the number of "advanced UE group" users (or the number of active users) or the proportion of the total number of users (or the total number of active users) or the amount of data, the preset threshold B is greater than 0. Decimal less than or equal to 1; If the criterion A is the number of users or the number of active users or the absolute value of the traffic to be sent, the preset threshold B should also be the corresponding absolute value.
- step 1006 the elMTA function is enabled.
- step 1008 the elMTA function is turned off.
- the present invention proposes dynamic configuration of the time division duplex uplink and downlink subframe ratio.
- the method, the base station, the system, and the communication device may adopt different configuration parameters for different communication devices when the communication devices of different versions are mixed, avoiding the performance degradation of some communication devices when a single parameter is adopted.
- embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
- computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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WO2015027389A1 (en) * | 2013-08-27 | 2015-03-05 | Qualcomm Incorporated | Backhaul signaling for interference mitigation and traffic adaptation |
CN109547171B (zh) * | 2013-09-26 | 2021-06-22 | 高通股份有限公司 | 用于针对LTE中的eIMTA有效使用DAI比特的方法和装置 |
CN104519575B (zh) * | 2013-09-27 | 2018-06-01 | 上海诺基亚贝尔股份有限公司 | TDD eIMTA系统中进行DL/UL TDD动态配置的方法 |
WO2015103733A1 (en) * | 2014-01-07 | 2015-07-16 | Qualcomm Incorporated | TWO SUBFRAME SET CSI FEEDBACK FOR eIMTA IN LTE |
WO2015117275A1 (en) | 2014-02-10 | 2015-08-13 | Qualcomm Incorporated | Handover into dynamic tdd ul/dl configuration enabled cells and/or comp cells |
CN105025576B (zh) * | 2014-04-19 | 2019-07-12 | 上海朗帛通信技术有限公司 | 一种d2d通信中的资源分配方法和装置 |
US10602538B2 (en) | 2014-09-27 | 2020-03-24 | Lg Electronics Inc. | Method for transmitting and receiving signal in wireless communication system and device for performing same |
WO2017024570A1 (zh) * | 2015-08-12 | 2017-02-16 | 华为技术有限公司 | 一种确定小区簇子帧配置的方法及装置 |
CN110167158B (zh) * | 2018-02-13 | 2023-04-07 | 中国移动通信有限公司研究院 | 传输资源确定方法及装置、通信设备及存储介质 |
WO2021072644A1 (zh) * | 2019-10-15 | 2021-04-22 | 深圳市大疆创新科技有限公司 | 通信方法、设备及移动终端 |
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