WO2016184239A1 - 下行控制信道的传输方法、配置方法及终端、基站 - Google Patents
下行控制信道的传输方法、配置方法及终端、基站 Download PDFInfo
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- WO2016184239A1 WO2016184239A1 PCT/CN2016/076516 CN2016076516W WO2016184239A1 WO 2016184239 A1 WO2016184239 A1 WO 2016184239A1 CN 2016076516 W CN2016076516 W CN 2016076516W WO 2016184239 A1 WO2016184239 A1 WO 2016184239A1
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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
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1806—Go-back-N protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
Definitions
- the present invention relates to a downlink control channel technology in the field of wireless communications, and in particular to a method, a configuration method, and a terminal, a base station, and a computer storage medium for transmitting a downlink control channel in a wireless communication system.
- Machine Type Communication (MTC) User Equipment User Equipment or Terminal
- M2M Machine to Machine
- MTC Machine Type Communication
- LTE Long-Term Evolution
- LTE-Advance Long-Term Evolution Advance
- MTC multi-class data services based on LTE/LTE-A will also be more attractive.
- the existing LTE/LTE-A system is transmitted based on dynamic scheduling of each subframe, that is, each subframe can transmit different control channels.
- a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) and an Enhanced Physical Downlink Control Channel (EPDCCH) are defined in LTE/LTE-A.
- the information carried by the Physical Control Format Indicator Channel (PCFICH) is used to indicate the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols for transmitting the PDCCH in one subframe.
- a Physical Hybrid-Review (ARQ) indicator channel (Physical Hybrid-ARQ Indicator Channel, abbreviated as PHICH) is used to carry acknowledgement/negative acknowledgement (ACK/NACK) feedback information of uplink transmission data.
- the downlink control channel adopts blind detection, and the terminal attempts to demodulate the downlink control channel with different aggregation levels and candidate sets in a certain search space.
- the existing UE-specific search space is as shown in Table 1 and Table 2.
- the search space is composed of candidate sets corresponding to different aggregation levels.
- the EPDCCH search space (One Distributed EPDCCH-PRB-set–Case 3) is shown in Table 2:
- the PDCCH/EPDCCH is used to carry downlink control information (Downlink Control Information, DCI for short), and includes: uplink and downlink scheduling information, and uplink power control information.
- Downlink Control Information Downlink Control Information
- uplink and downlink scheduling information includes: uplink and downlink scheduling information, and uplink power control information.
- the MTC terminal can obtain the DCI by demodulating the PDCCH/EPDCCH channel in each subframe, so as to implement demodulation of the Physical Downlink Share Channel (PDSCH) and Physical Uplink Share Channel (Physical Uplink Share Channel). Scheduling indication information for PUSCH).
- PDSCH Physical Downlink Share Channel
- Physical Uplink Share Channel Physical Uplink Share Channel
- MTC application terminal there is a type of terminal that has a limited radio frequency receiving bandwidth and limited location or its own characteristics, so that signals and channels that cannot receive full bandwidth transmission and channel performance are significantly degraded.
- smart meter reading MTC terminals are mostly installed in a low coverage performance environment such as a basement. They mainly send packet data, have low data rate requirements, and can tolerate large data transmission delays. Since such terminals have low data rate requirements, for the data channel, the correct transmission of the packet data can be ensured by a lower modulation and coding rate and multiple repeated transmissions in the time domain.
- the present invention provides a downlink control channel transmission method, a configuration method, and a terminal, a base station, and a computer storage medium, which can implement correct transmission of the downlink control channel by the base station side and detection and reception of the downlink control channel by the terminal side.
- an embodiment of the present invention provides a method for transmitting a downlink control channel, where the method includes:
- the terminal blindly detects the downlink control channel according to the maximum number of candidate sets N_total in one repeated transmission;
- the maximum number of candidate sets N_total satisfies one of the following conditions:
- the maximum number of candidate sets N_total is not greater than the number of total candidate sets of the legacy UE single subframe of the Long Term Evolution (LTE) system transmission terminal N_legacy;
- the maximum number of candidate sets N_total is the product of the number of legacy UE single-subframe total candidate sets N_legacy and the maximum value Y of the types of repetitions of blind detection of the downlink control channel, N_legacy ⁇ Y;
- the maximum number of candidate sets N_total is a value in a set of values with N_legacy and N_legacy ⁇ Y as a limit value.
- an embodiment of the present invention provides a method for configuring a downlink control channel, where the method includes:
- the base station configures a detection parameter set set(A, B) of the downlink control channel by using high layer signaling;
- the A configuration indicates the aggregation level or the number of physical resource block sets PRB, and the B configuration indicates the number of repetitions, the repetition level, or the coverage level;
- A is configured to configure the same number of aggregation levels for each coverage condition, and supports partial aggregation levels, or A configured to PRB numbers implicitly obtain corresponding aggregation levels;
- B is configured as an absolute value or a relative value, and the absolute value is a determined number of repetitions, and the relative value is a coverage level, a reference repetition number corresponding to the repetition level multiplied by the adjustment amount, or the coverage level and the repetition level are corresponding to The number of benchmark repetitions is increased or decreased by the number of steps.
- an embodiment of the present invention provides a terminal, where the terminal includes:
- a first determining unit configured to determine a maximum number of downlink control channel candidate sets N_total in one repetition transmission
- the detecting unit is configured to blindly detect the downlink control channel according to the maximum number of candidate sets N_total in one repeated transmission;
- the maximum number of candidate sets N_total satisfies one of the following conditions:
- the maximum number of candidate sets N_total is not greater than the maximum number of blind detections of the legacy UE single subframe of the Long Term Evolution (LTE) system transmission terminal N_legacy;
- the maximum number of candidate sets N_total is the maximum number N_legacy of the LTE system transmission terminal legacy UE single subframe total blind detection number N_legacy and the number of repetitions of blind detection of the downlink control channel N_legacy ⁇ Y;
- the maximum number of candidate sets N_total is a value in a set of values with N_legacy and N_legacy ⁇ Y as a limit value.
- an embodiment of the present invention provides a base station, where the base station includes:
- a second determining unit configured to determine a detection parameter set set(A, B) of the downlink control channel
- a configuration unit configured to configure a detection parameter set set(A, B) of the downlink control channel by using high layer signaling
- the A configuration indicates an aggregation level or a number of physical resource block sets PRB, and the B configuration indicates a repetition number, a repetition level, or an coverage level;
- A is configured to configure the same number of aggregation levels for each coverage condition, and supports partial aggregation levels. Same, or A is configured as the number of PRBs to implicitly obtain the corresponding aggregation level;
- B is configured as an absolute value or a relative value, and the absolute value is a determined number of repetitions, and the relative value is a coverage level, a reference repetition number corresponding to the repetition level multiplied by the adjustment amount, or the coverage level and the repetition level are corresponding to The number of benchmark repetitions is increased or decreased by the number of steps.
- an embodiment of the present invention provides a computer storage medium, where the computer storage medium stores executable instructions, where the executable instructions are used to perform a downlink control channel transmission method and downlink control provided by an embodiment of the present invention. The method of configuring the channel.
- the MTC terminal with limited receiving bandwidth can ensure that the aggregation level and the number of repetitions are received during the repeated transmission, and the normal and effective communication of the MTC terminal is ensured, and the downlink control provided by the embodiment of the present invention is used.
- the channel configuration method, the base station, and the detection parameter set of the downlink control channel configured by the high-layer signaling can ensure the correct transmission of the downlink control channel by the base station, and the use of multiple aggregation levels for the downlink physical control channel in the bandwidth-limited scenario and the coverage enhancement scenario. And a variety of repetitions/levels of transmission and detection issues.
- FIG. 1 is a schematic flowchart of an implementation process of a downlink control channel transmission method according to an embodiment of the present invention
- FIG. 2 is a schematic diagram 1 of a candidate set corresponding to a repetition number according to an embodiment of the present invention
- FIG. 3 is a second schematic diagram of a candidate set corresponding to the number of repetitions in the embodiment of the present invention.
- FIG. 4 is a schematic flowchart of an implementation process of a downlink control channel configuration method according to an embodiment of the present invention
- FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
- FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- the maximum number of blind detections When receiving the control information of repeated transmission, the maximum number of blind detections will be indexed with the number of repeated subframes. Sex increases, so it is necessary to limit the blind detection path. At the same time, the PDCCH is unavailable due to bandwidth limitation.
- a common method of limiting blind detection paths uses the same aggregation level and the same candidate set for each subframe. Since the number of repeated transmissions is not necessarily a fixed value, for example, the coverage performance changes due to channel conditions or terminal location changes, and the number of times of using repeated transmissions also changes, so that the terminal not only detects different aggregation levels when receiving detection control information. There is also the problem of detecting the number of repetitions. Therefore, it is necessary to comprehensively consider the design of the blind channel detection scheme for repeated transmission.
- the downlink control channel transmission method includes the following steps:
- step 101 the terminal determines the maximum number of candidate downlink control channels in a repeated transmission.
- Step 102 The terminal blindly detects the downlink control channel based on the maximum number of candidate sets in one repetition transmission.
- the maximum number of downlink control channel candidate sets N_total in a repeated transmission of the terminal is not greater than the maximum blind detection number N_legacy of the LTE system transmission terminal legacy UE single subframe, or the maximum number of candidate sets N_total is the total blind detection of the LTE system transmission terminal legacy UE single subframe.
- the maximum number of blind detections is the maximum number of only the user-specific search space (USS, UE-specific Search Space), and the maximum number of blind detections corresponding to the user search space (CSS, Common Search Space), or Corresponds to the maximum number of USS and CSS.
- the aggregation level of the downlink control channel (also referred to as detection in the embodiment of the present invention) is at most X, X is an integer greater than or equal to 1, and X is preferably 1, 2, and 4;
- the type of blind detection of the number of repetitions of the downlink control channel is at most Y, Y is an integer greater than or equal to 1, and Y is preferably 1, 2, and 4;
- the manner in which the terminal determines the number of repetitions of the downlink control channel and the aggregation level includes at least one of the following: the terminal is determined by a predefined definition; and the terminal passes the System Information Block (SIB).
- SIB System Information Block
- the configuration is determined, the terminal is determined by a random access response (RAR) configuration, and the terminal is determined by a radio resource control (RRC) signaling configuration.
- RAR random access response
- RRC radio resource control
- the Z value is 16 when detecting two downlink control information formats, and the Z value is 32 when detecting a downlink control information format.
- the Z value is 6 when detecting two downlink control information formats, and the Z value is 12 when detecting a downlink control information format.
- the specific possible set (A, B) combination is one of the following:
- the number of candidate sets corresponding to each aggregation level may be the same as the number of candidate sets of the existing search space, or less than the existing search space. The number of candidate sets.
- a repetition level/coverage level corresponds to only one repetition number, it is the same as 1; if multiple repetition times corresponding to the repetition level, the correspondence table may be defined in the protocol, and the number of aggregation level candidate sets is required at this time. Reduce accordingly.
- the specific possible set (A, B) combination is one of the following:
- a repetition level/coverage level corresponds to only one repetition number, it is the same as 1; if multiple repetition times corresponding to the repetition level, the correspondence table may be defined in the protocol, and the number of aggregation level candidate sets is required at this time. Reduce accordingly.
- the principle that the base station allocates the number of candidate sets for the X aggregation levels includes at least one of the following:
- the number of candidate sets of the large aggregation level can occupy the PRB set of the physical resource block set; in this case, the number of candidate sets of the maximum aggregation level that can be supported is configured first, and the configured PRB set is occupied. , the number of candidate sets of the next largest aggregation level that can be supported by the second configuration, and the configured by the full size PRB set until the maximum of the sum of the number of candidate sets is reached.
- the detected X aggregation levels have at least one candidate set; at this time, Y aggregation levels are allocated, and it is necessary to ensure that each aggregation level has at least one candidate set.
- the number of candidate sets allocated by the small aggregation level is not less than the number of candidate sets allocated by the large aggregation level.
- One method that can be adopted is to configure the number of candidate sets of the minimum aggregation level that can be supported first, and to fill the configured PRB set, and the number of candidate sets of the sub-small aggregation level that can be supported by the second configuration is full. The configured PRB set until the maximum of the sum of the number of candidate sets is reached.
- the mapping is configured by pre-defined or higher layer signaling when the 6 PRB set is occupied. Include one of the following: using two sub-packets in the 6PRB set to perform ECCE mapping separately; using three sub-packets in the 6PRB set to perform ECCE mapping separately; performing ECCE mapping directly in the 6PRB set; in the 8PRB set ECCE mapping is performed using only 6RPBs; wherein the high layer signaling indicates one of the above four cases using 2 bit bits, or 1 bit is used to indicate one of any two of the above four cases.
- ECCE Enhanced Control Channel Element
- the two sub-packets are 2PRB and 4PRB respectively, and the group with the smallest sequence PRB is 2PRB, first numbered 0-7ECCE in 2PRB, and then in 4PRB No. 8-23ECCE; when the group with the smallest sequence number PRB is 4PRB, first numbered 0-15ECCE in the 4PRB, and then numbers 16-23ECCE in the 2PRB; the 2 sub-packets 2PRB and 4PRB included in the 6PRB set, The number of the 2PRB in the frequency domain is lower than the number of the 4PRB in the frequency domain;
- the three sub-packets are 3 PRBs, 2 PRBs, and 2 PRBs, respectively. Based on the ascending order of the PRB numbers, they are numbered 0-7ECCE, 8-15ECCE, and 16-23ECCE in 3 2PRBs.
- the rules of distributed mapping are not modified, 8ECCE and 16ECCE can be respectively occupied according to the 2PRB area and the 4PRB area, which is equivalent to occupying 24ECCE. That is, the set is still one at this time, but it is equivalent to the grouping in the ECCE number, first numbered 0-7ECCE in the 2PRB (LeCCE or DeCCE), and then numbered 8-23ECCE (LeCCE or DeCCE) in the 4PRB.
- the advantage of this is the DeCCE mapping.
- the formula does not need to be modified, and the search space is still 24ECCE (6PRB), and after this allocation, it can also be multiplexed with the PRB set of the legacy EPDCCH.
- the search space L does not change and remains:
- Subpacket Group1 EPDCCH set X m in subframe i, ECCEs number available for EPDCCH transmission from 0 to And the ECCE number n corresponds to:
- Subpacket Group2 EPDCCH set X m in subframe i, ECCEs number available for EPDCCH transmission from To N ECCE, m, i -1 and ECCE number n corresponds to:
- the principle that the base station allocates the number of candidate sets for the Y types of repetitions includes at least one of the following:
- the candidate set of the maximum number of repetitions is 1;
- the number of candidate sets of the first (small) repetition number is not less than the number of candidate sets of the second (large) repetition number, and the first repetition number is smaller than the second repetition number.
- Each of the detected Y types of repetitions corresponds to at least one candidate set.
- the relationship between the repetition times is preferably that the larger number of repetitions is a multiple of the smaller number of repetitions, and the number of candidate sets of the maximum number of repetitions is 1, and the candidate of the smaller number of repetitions is The number of sets is a multiple of the number of candidate sets with a larger number of repetitions.
- the number of repetitions 40 has one candidate set, the number of repetitions 20 corresponds to two candidate sets, and the number of repetitions 10 corresponds to four candidate sets;
- the number of candidate sets corresponding to the X aggregation levels configured at the time is not more than 2 or 4 at the maximum of the single subframe blind detection.
- the detected Y species has at least one candidate set each, for example, the number of repetitions 40 has 1 candidate set, the number of repetitions 20 has 2 candidate sets, the number of repetitions 10 has 2 candidate sets; or the number of repetitions 40 has 1 candidate set
- the number of repetitions 20 has 1 candidate set, and the number of repetitions 10 has 1 candidate set.
- the number of candidate sets corresponding to the X aggregation levels configured at this time is not more than 5 or 10 at the maximum of the single subframe blind detection.
- the set of detection parameters of the downlink control channel is set (A, B) for the base station to be configured by high layer signaling, where A represents the configured aggregation level or the number of PRBs, and B represents the configured repetition number or repetition level or coverage level.
- A can be configured with the same number of aggregation levels for each coverage condition but allows partial aggregation levels to be different, or the number of configured PRBs implicitly obtains the corresponding aggregation level.
- B can be configured as an absolute value or a relative value, the absolute value is the determined number of repetitions, and the relative value is the number of reference repetition times corresponding to the coverage level or the repetition level multiplied by the adjustment amount, or the reference repetition corresponding to the coverage level or the repetition level. Times plus Reduce the length of the step.
- the configured set is set(A, B) where A represents the configured aggregation level and B represents the configured number of repetitions.
- B can be configured as an absolute value or a relative value, and the absolute value is the determined number of repetitions, and the relative value is the number of reference repetition times corresponding to the coverage level multiplied by the adjustment amount or the addition and subtraction step size.
- the configured parameter examples are as follows:
- Aggregation grade AL 1, 2, 4, 8, 16, 24 ECCE
- Repeat level/cover level, RL1, 2, 3 (corresponding coverage is increased by 5, 10, 15dB or 6, 12, 18dB), where RL1, 2, 3 can correspond to specific times, such as 10, 20, 80 times, optional
- the signaling indicates that the step size N can be performed on the basis of the number of times, N can be 2, 4, 8, or 10; or only the intermediate variable is not represented, and does not correspond to a specific number of times, and each RL includes a specific number of times, such as RL1 is ⁇ 1, 2, 4, 8, 10, 12, 16 ⁇ , RL2 is ⁇ 10, 12, 14, 16, 16, 18, 40, 60, 80, 100 ⁇ , and RL3 is ⁇ 80, 100, 120, 140, 160, 180, 200, 250, 300 ⁇ .
- Number of repetitions specific values such as 1, 2, 4, 8, 10, 12, 16, 20, 40, 80, 100, 120, 140, 160, 180, 200, 300, and the like.
- B is an absolute value of the number of repetitions.
- the following tables can be configured individually or in a mixture of tables.
- High-level signaling configuration Aggregation level repeat times Set(0) 4 species ⁇ 1M, 2M, 4M, 8M ⁇ Set(1) 4 species ⁇ 10K, 20K, 40K, 80K ⁇ Set(2) 4 species ⁇ 100L, 150L, 200L, 300L ⁇
- the aggregation levels and candidate sets corresponding to Table 1 are shown in Table 1-1 or 1-2.
- High-level signaling configuration Aggregation level repeat times Set(0) 4 species ⁇ 1M, 5M ⁇ Set(1) 4 species ⁇ 4K, 20K ⁇ Set(2) 4 species ⁇ 16L, 80L ⁇
- the aggregation levels and candidate sets corresponding to Table 2 are shown in Table 2-1 or 2-2.
- the aggregation levels and candidate sets corresponding to Table 3 are shown in Table 3-1 or 3-2.
- the aggregation level is detected at the same time.
- the sum of the candidate sets of the aggregation levels is 4 (the upper limit). Therefore, the priority set ensures that the candidate set of the large aggregation level can occupy the PRB set.
- the principle allocation is as shown in Table 4-1 below:
- High-level signaling configuration Aggregation level repeat times Set(0) 2 types Table 5-2 configuration ⁇ 1M, 5M ⁇ Set(1) 2 kinds Table 5-1 configuration ⁇ 10K, 20K ⁇ Set(2) 2 kinds Table 5-1 configuration ⁇ 100L, 200L ⁇
- the aggregation levels and candidate sets corresponding to Table 5 are shown in 5-1 or 5-2.
- High-level signaling configuration Aggregation level repeat times Set(0) 2 types Table 6-2 configuration 1M Set(1) 2 kinds of Table 6-1 configuration 8K Set(2) 2 kinds of Table 6-1 configuration 64L
- the aggregation levels and candidate sets corresponding to Table 6 are shown in Table 6-1 or 6-2.
- High-level signaling configuration Aggregation level repeat times Set(0) 1 type Table 7-3 Configuration ⁇ 1M, 2M, 4M, 8M ⁇ Set(1) 1 type Table 7-2 configuration ⁇ 10K, 20K, 40K, 80K ⁇ Set(2) 1 type Table 7-1 configuration ⁇ 100L, 150L, 200L, 300L ⁇
- the aggregation levels and candidate sets corresponding to Table 7 are shown in Table 7-1 or 7-2 or 7-3.
- High-level signaling configuration Aggregation level repeat times Set(0) 1 type Table 7-3 Configuration ⁇ 1M, 5M ⁇ Set(1) 1 type Table 7-2 configuration ⁇ 10K, 20K ⁇ Set(2) 1 type Table 7-1 configuration ⁇ 100L, 200L ⁇
- the aggregation levels and candidate sets corresponding to Table 8 are shown in Table 7-1 or 7-2 or 7-3.
- the aggregation levels and candidate sets corresponding to Table 9 are shown in Table 7-1 or 7-2 or 7-3.
- Example 10 The above examples 1-9 are separately configured, and the tables may be mixed and configured. As shown in Example 10.
- High-level signaling configuration Aggregation level repeat times Set(0) 2 types Table 4-2 configuration ⁇ 1M, 2M, 4M, 8M ⁇ Set(1) 2 types Table 4-1 configuration ⁇ 10K, 20K, 40K, 80K ⁇ Set(2) 2 types Table 4-1 configuration ⁇ 100L, 150L, 200L, 300L ⁇ Set(3) 2 types Table 5-2 configuration ⁇ 1M, 5M ⁇ Set(4) 2 kinds Table 5-1 configuration ⁇ 10K, 20K ⁇ Set(5) 2 kinds Table 5-1 configuration ⁇ 100L, 200L ⁇ Set(6) 2 kinds of Table 6-1 configuration 10K Set(7) 2 kinds of Table 6-1 configuration 100L
- the aggregation levels and candidate sets corresponding to Table 10 are shown in Table 4-1 or 4-2 or 5-1 or 5-2 or 6-1.
- Example 11 the relative value is configured for B, the reference value is added or subtracted, or the reference value is multiplied by the adjustment factor, and the correspondence table of the specific coverage level/repetition level and the reference repetition number is shown in Table 11.
- the absolute value of the same coverage level is ⁇ 80, 90, 110, 120 ⁇ , and the relative values are ⁇ N3-20, N3-10, N3+10, N3+20 ⁇ , ⁇ 80% N3, 90% N3, 110% N3, 120% N3 ⁇ or ⁇ N3/8, N3/4, N3/2, N3 ⁇ ;
- the absolute values of different coverage levels are configured as ⁇ 10, 40, 200 ⁇ relative values ⁇ 2N1, 2N2, 2N3 ⁇ .
- Example 12 the relative value is configured for B, and the coverage level/repetition level is used in a manner corresponding to the set of repetition times, without adding or subtracting the adjustment step size or multiplying the adjustment factor.
- the correspondence table of the specific coverage level/repetition level and the repetition number set is shown in Table 12.
- the set of detection parameters set(A, B) of the configured downlink control channel may implicitly obtain the other of A and B by configuring one of A and B.
- the implicitly obtained method includes, but is not limited to, a one-to-one correspondence between A and B; the product of A and B is less than Z in quantity, and there is a one-to-one correspondence between the categories.
- a and B there is a one-to-one correspondence between A and B.
- a small aggregation level corresponds to a small repetition number and a large aggregation level corresponds to a large repetition number
- a small aggregation level corresponds to a large repetition number and a large aggregation level corresponds to a small repetition number.
- the product of A and B is N1 or the sum is N2, and there is a one-to-one correspondence between the types.
- the RRC connection establishes a detection parameter set for configuring the downlink control channel by using different high layer signaling, or whether different types of search spaces are configured according to whether the RRC establishes.
- the high layer signaling includes SIB, RRC, and RAR.
- Search space types include USS and CSS.
- the CSS is configured using the SIB, where the SIB refers to the SIBx with no control transmission, preferably SIB1.
- SIB refers to the SIBx with no control transmission
- SIB1 SIB1.
- the USS is configured by using RRC signaling, where the RRC configuration can be combined with the EPDCCH configuration, that is, the relevant parameters can be added to the existing EPDCCH configuration. If the location and number of PRBs are configured, you can add the configuration ⁇ aggregation level, number of repetitions ⁇ . Configure a different set of ⁇ aggregation levels, repetitions ⁇ depending on the coverage factor.
- the number of PRBs corresponds to the aggregation level set one by one.
- the relationship between the number of PRBs and the aggregation level is different in different coverage levels (the set of repetition times is different for different coverage levels).
- the number of PRBs corresponds to the aggregation level set one by one, and there is a certain one-to-one correspondence between the repetition number sets included in the repetition level.
- the relationship between the number of PRBs and the aggregation level is different in different repetition levels (the number of repetitions is different for different repetition levels).
- Indication ⁇ PRB number/aggregation level, repetition level, step size/adjustment factor ⁇ - the specific number of repetitions at this time is the number of reference repetitions corresponding to the repetition level ⁇ -2 times step size, -1 times step size , +1 times step size, +2 times step size ⁇ or ⁇ 1/2 reference value, 3/4 reference value, 5/4 reference value, 3/2 reference value ⁇ .
- the step size is different for different coverage levels.
- set(A, B) is configured according to the coverage level/message type/search space type.
- the indication of A is one of an indication of an aggregation level, a number of PRBs, or a joint indication.
- the number of different PRBs is one-to-one corresponding to the set of aggregation level numbers used correspondingly.
- the one-to-one correspondence is different when different coverage levels are different, that is, the number of aggregation levels corresponding to the same number of PRBs may be the same or different at different coverage levels, or the number of aggregation levels corresponding to the same PRB number is the same.
- the specific aggregation level types may be the same, partially different, or completely different at different coverage levels.
- the indication of B indicates that the number of repetitions, the repetition level, and the coverage level are indicated therein.
- One or a joint indication wherein when indicating the coverage level or the repetition level, it is also necessary to display an indication or implicitly determine the corresponding number of reference repetition times multiplied by the adjustment amount or the addition and subtraction step size.
- the number of reference repetitions corresponding to different repetition levels or coverage levels is one-to-one correspondence, or the number of repetition times corresponding to different repetition levels or coverage levels is one-to-one correspondence. More preferably, the elements in the set of repetition times corresponding to different repetition levels or coverage levels allow portions to be identical.
- the configuration set (A, B) only configures the detection quantity, and the specific detection aggregation level and the repetition number are implicitly obtained.
- the implicit policy includes, but is not limited to, obtaining a specific detected repetition number or repetition number set and an aggregation level category according to the configured quantity simultaneously combining the same coverage level or the correspondence relationship between the repetition level and the specific value; The quantity is combined with different coverage levels or the correspondence between the repetition level and the specific value to obtain a specific detection repetition number or repetition number set and an aggregation level type;
- the search space where the downlink control channel is located is two PRB sets.
- the first (RPB) set is configured based on a fixed aggregation level, and the second set is configured based on a fixed number of repetitions.
- the frequency domain can overlap completely.
- it is equivalent to configuring the first set to use one type of aggregation level for four repetitions, and the second set to use four types of aggregation levels for one repetition number.
- the terminal implicitly obtains the aggregation level and the number of repetitions to be detected by at least one of the following parameters.
- Coverage level repetition level, PRB set of downlink control channel, and number of PRBs in the set.
- the implicit obtaining method includes, but is not limited to, one or a combination of the following manners: determining the number of repetitions of detection according to the coverage level or the repetition level; and determining, by the terminal, the set of the number of repetitions detected according to the coverage level or the repetition level; Determining the number and type of the detected aggregation levels according to the coverage level or the repetition level; determining the number and type of the detected aggregation levels according to the configured PRB set and the number of PRBs in the set; determining the number of detected aggregation levels according to the detected repetition number or the number of repetition times And a category; determining a set of repetitions or repetitions of detection based on the number and type of aggregation levels detected;
- the MTC terminal with limited reception bandwidth blindly detects the aggregation level and the number of repetitions during repeated transmission, and ensures normal and effective communication of the MTC terminal.
- This embodiment describes the downlink control channel transmission in detail by using the method provided by the present invention.
- the base station passes the set (A, B) of the predefined CSS, where the configured A and B are the aggregation level and the number of repetitions represented by the absolute value.
- the set (A, B) is two kinds of aggregation levels and four kinds of repetition times.
- the base station considers the coverage level 3 when the coverage of the worst terminal is 2 ⁇ 2 kinds of AL, (80, 100, 160, 200) ⁇ .
- the terminal When the terminal detects the downlink control channel blindly, the terminal detects the four types of repetitions 80, 100, 160, and 200, and blindly checks the two aggregation levels for each repetition number. For example, when the PRB set is set to 6, AL16 and 24 are detected. The control information before the establishment of the RRC connection is received through the CSS.
- the set (A, B) of the USS is configured through RRC signaling, where the configured A and B are the aggregation level and the number of repetitions represented by the absolute value.
- the set (A, B) is one polymerization level and three repetition times.
- the number of repetitions configured at this time is one candidate set for the number of repetitions 40, two candidate sets for the number of repetitions 20, and four candidate sets for the number of repetitions 10; the aggregation level configured at this time is AL24 in the 6 PRB set.
- the number of candidate sets is 1.
- the control information after the establishment of the RRC connection is received by the USS.
- the MTC terminal with limited receiving bandwidth blindly detects the aggregation level and the repetition number of different configurations before and after the RRC connection is established, ensuring that the MTC terminal receiving the bandwidth is limited.
- the MTC terminal communicates normally and efficiently.
- This embodiment describes the downlink control channel transmission in detail by using the method provided by the present invention.
- the base station configures the set (A, B) of the CSS through the system information block SIB1, where the configured A and B are the aggregation level and the number of repetitions represented by the absolute value.
- the aggregation level is detected at the same time.
- the sum of the candidate sets of the aggregation levels is 4 (the upper limit). Therefore, the priority set ensures that the candidate set of the large aggregation level can occupy the PRB set.
- the principle allocation is as shown in Table 4-1 below:
- the terminal detects the downlink control channel blindly, if the receiving configuration is set(1), the PRB set is 6PRB, and the detection is performed by 4 repetition times 10, 20, 40, 80, and 2 types of blind detection for each repetition number. Aggregation grades AL16 and 24. The control information before the establishment of the RRC connection is received through the CSS.
- the set (A, B) of the USS is configured through RRC signaling, where the configured B is the number of repetitions represented by the relative value.
- the set (A, B) is 4 kinds of polymerization levels and 4 repetition times.
- the aggregation levels and candidate sets corresponding to Table 13 are shown in Table 1-1 or 1-2.
- the terminal detects the downlink control channel blindly, if the receiving configuration is set(2), the PRB set is 6PRB, and the detection is performed by 4 repetition times 80, 90, 110, 120, and 4 types of blind detection for each repetition number. Aggregation levels AL4, 8, 16 and 24.
- the control information after the establishment of the RRC connection is received by the USS.
- the number of repetitions configured at this time is one candidate set for the number of repetitions 40, two candidate sets for the number of repetitions 20, and four candidate sets for the number of repetitions 10; the aggregation level configured at this time is AL24 in the 6 PRB set.
- the number of candidate sets is 1.
- the control information after the establishment of the RRC connection is received by the USS.
- the terminal may further correspond to the number of repetitions of the downlink control channel that is actually detected, and the number of repetitions of the downlink control channel and the number of repetitions of other channels.
- the relationship implicitly determines the number of repetitions corresponding to other channels, and the other channels include at least one of: a downlink traffic channel (PDSCH), an uplink traffic channel (PUSCH), and an uplink control channel (PUCCH).
- PDSCH downlink traffic channel
- PUSCH uplink traffic channel
- PUCCH uplink control channel
- the number of repetitions of the downlink control channel is configured in multiple ways, but the terminal actually detects only one type, and the number of repetitions of the detected EPDCCH (the only one determined) is further implicitly obtained according to the correspondence table of repetition times.
- the number of repetitions of the PDSCH is configured in multiple ways, but the terminal actually detects only one type, and the number of repetitions of the detected EPDCCH (the only one determined) is further implicitly obtained according to the correspondence table of repetition times.
- the number of repetitions of the PDSCH is configured in multiple ways, but the terminal actually detects only one type, and the number of repetitions of the detected EPDCCH (the only one determined) is further implicitly obtained according to the correspondence table of repetition times.
- the embodiment of the present invention further describes a method for configuring a downlink control channel, which is applied to a base station side, as shown in FIG. 4, and includes the following steps:
- the base station determines a set of detection parameters set (A, B) of the downlink control channel.
- Step 202 Configure a detection parameter set set(A, B) of the downlink control channel by using high layer signaling.
- the A configuration indicates an aggregation level or a physical resource block set PRB number
- the B configuration indicates a repetition number, a repetition level, or an coverage level.
- A is configured to configure the same number of aggregation levels for each coverage condition, and supports partial aggregation levels, or A configured to PRB numbers implicitly obtain corresponding aggregation levels;
- B is configured as an absolute value or a relative value, and the absolute value is a determined number of repetitions, and the relative value is a coverage level, a reference repetition number corresponding to the repetition level multiplied by the adjustment amount, or the coverage level and the repetition level are corresponding to The number of benchmark repetitions is increased or decreased by the number of steps.
- the base station configures the detection parameter set set(A, B) of the downlink control channel by using high layer signaling, including:
- the base station configures a detection parameter set of the downlink control channel by using different high-layer signaling according to whether the RRC connection establishes, according to whether the RRC establishes a different type of search space for configuring the downlink control channel, where the high-layer signaling includes SIB, RRC, and RAR, the search space types include USS and CSS.
- the base station configures the detection parameter set set(A, B) of the downlink control channel by using high layer signaling, including:
- the base station uses the high layer signaling configuration, according to the coverage level, the message type, and the search space type At least one of the settings is configured for the set (A, B).
- the base station configures the detection parameter set set(A, B) of the downlink control channel by using high layer signaling, including:
- the indication of the base station to the A is in the following manner: one of the aggregation level and the number of the PRBs is used to indicate one of them or a joint indication, where the number of different PRBs corresponds to the set of aggregation level numbers used in a one-to-one correspondence.
- the base station configures the detection parameter set set(A, B) of the downlink control channel by using high layer signaling, including:
- the one-to-one correspondence between the number of different PRBs and the corresponding aggregation level quantity set is different; wherein the number of aggregation levels corresponding to the same PRB quantity is at different coverage levels.
- the times are the same or different, or the number of aggregation levels corresponding to the same number of PRBs is the same, and the specific aggregation level types are the same, partially different, or completely different at different coverage levels.
- the base station configures the detection parameter set set(A, B) of the downlink control channel by using high layer signaling, including:
- the base station adopts the following indication mode for B: one of the repetition number, the repetition level, the coverage level, the adjustment amount, and the step size is to be indicated.
- the base station configures the detection parameter set set(A, B) of the downlink control channel by using high layer signaling, including:
- the base station indicates that there is a one-to-one correspondence between different repetition levels or coverage levels and the number of reference repetitions; different repetition levels or coverage levels are in one-to-one correspondence with the repetition number sets; different repetition levels or coverage levels have a one-to-one correspondence with the repetition times.
- the embodiment of the present invention further describes a terminal, as shown in FIG. 5, including:
- the first determining unit 10 is configured to determine a downlink control channel maximum candidate set number N_total in one repetition transmission;
- the detecting unit 20 is configured to perform according to the maximum number of candidate sets N_total in one repetition transmission Detecting a downlink control channel;
- the maximum number of candidate sets N_total satisfies one of the following conditions:
- the maximum number of candidate sets N_total is not greater than the maximum number of blind detections of the legacy UE single subframe N_legacy;
- the maximum number of candidate sets N_total is the maximum number of times of the total number of blinds of the legacy UE single subframe N_legacy and the number of repetitions of blind detection of the downlink control channel, N_legacy ⁇ Y;
- the maximum number of candidate sets N_total is a value in a set of values corresponding to N_legacy and N_legacy ⁇ Y.
- the maximum number of blind detections is a maximum number of blind detections corresponding only to the USS, a maximum number of blind detections corresponding only to the CSS, or a maximum number of blind detections corresponding to the USS and the CSS.
- the aggregation level used for detecting the downlink control channel is at most X, X is an integer greater than or equal to 1, and Y is an integer greater than or equal to 1.
- X and Y satisfy: X ⁇ Y ⁇ Z, and Z takes a value of (N_total)/2 or N_total.
- the maximum value of the sum of the number of candidate sets corresponding to each aggregation level of the downlink control channel is Z/Y; and the maximum value of the sum of the number of candidate sets corresponding to each repetition number of the downlink control channel is Z /X.
- the determining the number of repetitions and the aggregation level used for detecting the downlink control channel includes at least one of the following: predefined; SIB configuration; RAR configuration; RRC signaling configuration.
- the principle of allocating the number of candidate sets for the X kinds of aggregation levels adopts at least one of the following:
- the number of candidate sets of the high aggregation level is preferentially guaranteed to occupy the physical resource block set PRB set;
- the number of candidate sets allocated by the first aggregation level is not less than the number of candidate sets allocated by the second aggregation level; wherein the detected X types of aggregation levels have at least one candidate set, and the first aggregation level occupies The resource is smaller than the resource occupied by the second aggregation level.
- the base station separately performs ECCE mapping for 2 or 3 sub-packets by a predefined configuration. Or performing ECCE mapping for two or three sub-packets by high-level signaling configuration;
- the two sub-packets are 2PRB and 4PRB respectively. Based on the ascending order of the PRB sequence number, the sub-packets with the smallest PRB are preferentially selected for ECCE mapping.
- the principle that the base station allocates the number of candidate sets for the Y types of repetitions includes at least one of the following:
- the candidate set of the maximum number of repetitions is 1;
- the number of candidate sets of the first repetition number is not less than the number of candidate sets of the second repetition number, and the first repetition number is smaller than the second repetition number; wherein each of the detected Y repetition times There are at least one candidate set for the number of repetitions.
- the set of detection parameters of the downlink control channel is set (A, B) for the base station to be configured by high layer signaling; where A is the configured aggregation level or the number of PRBs, and B is the configured repetition number, repetition level, or coverage. grade;
- A is configured to configure the same number of aggregation levels for each coverage condition, and supports partial aggregation levels, or A configured to PRB numbers implicitly obtain corresponding aggregation levels;
- B is configured as an absolute value or a relative value, and the absolute value is a determined number of repetitions, and the relative value is a coverage level, a reference repetition number corresponding to the repetition level multiplied by the adjustment amount, or the coverage level and the repetition level are corresponding to The number of benchmark repetitions is increased or decreased by the number of steps.
- the detecting unit 20 is further configured to implicitly obtain the other of A and B by configuring one of A and B by an implicit relationship between A and B.
- the implicit relationship between A and B includes: a one-to-one correspondence between A and B; a product of A and B is N1 or a sum of N2, and A and B have a one-to-one correspondence.
- the detection parameter set of the downlink control channel is configured by the base station according to whether the RRC connection is established or not, and the different types of the search space are configured by the base station according to whether the RRC establishes the uplink, and the high layer signaling includes the SIB.
- the search space types include USS and CSS.
- the set (A, B) is configured according to at least one of a coverage level, a message type, and a search space type when the base station uses the high layer signaling configuration.
- the first determining unit 10 is further configured to acquire an indication of the base station for A, and the base station pairs A.
- the indication is that one of the aggregation level and the number of PRBs is indicated or a joint indication, and there is a one-to-one correspondence between the number of aggregation level numbers used by the different PRB numbers.
- the one-to-one correspondence between the number of different PRBs and the corresponding aggregation level quantity set is different;
- the number of aggregation levels corresponding to the same number of PRBs is the same or different at different coverage levels; or, the number of aggregation levels corresponding to the same number of PRBs is the same, and the specific aggregation level types are the same, partially different, or completely different at different coverage levels.
- the first determining unit 10 is further configured to acquire an indication of the base station to the B, and the indication of the base station to the B is one of the repetition number, the repetition level, the coverage level, the adjustment amount, and the step size indication or a joint indication; among them,
- the first determining unit 10 is further configured to acquire the number of repetitions explicitly indicated by the base station; or determine the terminal by using an implicit relationship by using the coverage level, the repetition level adjustment amount, and the step size of the base station joint indication And the number of reference repetitions corresponding to the indicated repetition level and/or the coverage level, and the number of repetitions is obtained by multiplying the reference repetition number by the adjustment amount, or adding or subtracting the step size by using the reference repetition number The number of repetitions is obtained.
- the implicit relationship comprises:
- the first determining unit 10 is further configured to, when the base station configures set (A, B) and configure only the detected quantity, obtain the detected aggregation level and the number of repetitions based on the implicit policy.
- the first determining unit 10 obtains the detected aggregation level and the number of repetitions based on the implicit policy, including adopting at least one of the following implicit policies:
- the specific detection repetition number set and the aggregation level type are obtained;
- the terminal obtains the number of repetitions of the specific detection and the type of the aggregation level according to the number of configurations and the correspondence between the specific coverage values of the different coverage levels and the number of repetitions;
- the specific number of repetitions and the aggregation level are obtained.
- the search space where the downlink control channel is located is two PRB sets, wherein the first PRBset is configured based on a fixed aggregation level, and the second PRB set is configured based on a fixed number of repetitions.
- the detecting unit 20 is further configured to obtain the aggregation level and the number of repetitions to be detected by at least one of the following parameters: an coverage level, a repetition level, a PRB set of the downlink control channel, and a number of PRBs in the set.
- the detecting unit 20 is further configured to obtain the aggregation level and the number of repetitions to be detected in at least one of the following manners:
- the number of repetitions of the detection is determined according to the coverage level or the repetition level;
- a set of the number of repetitions or repetitions of detection is determined based on the number and type of aggregation levels detected.
- the detecting unit 20 is further configured to implicitly determine the channel corresponding to the number of repetitions of the downlink control channel and the number of repetitions of the downlink control channel and the number of repetitions of other channels.
- the number of repetitions, the other channels include at least one of: a downlink traffic channel, an uplink traffic channel, and an uplink control channel.
- Each unit in the terminal can be implemented by a processor, a microprocessor (MCU), a logic programmable gate array (FPGA), or an application specific integrated circuit (ASIC).
- MCU microprocessor
- FPGA logic programmable gate array
- ASIC application specific integrated circuit
- the embodiment of the present invention further describes a base station, as shown in FIG. 6, including:
- the second determining unit 30 is configured to determine a detection parameter set set (A, B) of the downlink control channel;
- the configuration unit 40 is configured to configure a detection parameter set of the downlink control channel by using high layer signaling. (A, B);
- the A configuration indicates an aggregation level or a number of physical resource block sets PRB, and the B configuration indicates a repetition number, a repetition level, or an coverage level;
- A is configured to configure the same number of aggregation levels for each coverage condition, and supports partial aggregation levels, or A configured to PRB numbers implicitly obtain corresponding aggregation levels;
- B is configured as an absolute value or a relative value, and the absolute value is a determined number of repetitions, and the relative value is a coverage level, a reference repetition number corresponding to the repetition level multiplied by the adjustment amount, or the coverage level and the repetition level are corresponding to The number of benchmark repetitions is increased or decreased by the number of steps.
- the configuration unit 40 is further configured to configure, according to whether the RRC connection establishes a detection parameter set of the downlink control channel, using different high-layer signaling, according to whether the RRC establishes a different type of search space for configuring the downlink control channel,
- the high layer signaling includes SIB, RRC, and RAR, and the search space types include USS and CSS.
- the configuration unit 40 is further configured to configure the set (A, B) according to at least one of a coverage level, a message type, and a search space type when using a high layer signaling configuration.
- the configuration unit 40 is further configured to adopt the following manner: the aggregation level, the number of PRBs, or the joint indication, where the number of different PRBs is different from the corresponding aggregation level quantity set. Correspondence relationship.
- the one-to-one correspondence between the number of different PRBs and the corresponding aggregation level quantity set is different; wherein, the number of aggregation levels corresponding to the same PRB quantity
- the same or different at different coverage levels, or the same number of aggregation levels corresponding to the same number of PRBs, and the specific aggregation level types are the same, partially different, or completely different at different coverage levels.
- the configuration unit 40 is further configured to adopt the following indication manner for B: one of the repetition number, the repetition level, the coverage level, the adjustment amount, and the step size indication or a joint indication.
- different repetition levels or coverage levels are in one-to-one correspondence with the number of reference repetitions; different repetition levels or coverage levels are in one-to-one correspondence with the set of repetition times; the number of repetitions corresponding to different repetition levels or coverage levels.
- Each unit in the base station can be implemented by a processor, a microprocessor (MCU), a logic programmable gate array (FPGA), or an application specific integrated circuit (ASIC).
- MCU microprocessor
- FPGA logic programmable gate array
- ASIC application specific integrated circuit
- the MTC terminal with limited reception bandwidth can blindly detect the aggregation level of different configurations before and after the RRC connection is established. The number of repetitions is received to ensure normal and efficient communication of the MTC terminal.
- the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores executable instructions, where the executable instructions are used to execute the transmission method of the downlink control channel shown in FIG. 1, or perform the method shown in FIG. The configuration method of the downlink control channel.
- the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
- the foregoing storage medium includes: a mobile storage device, a random access memory (RAM), a read-only memory (ROM), a magnetic disk, or an optical disk.
- RAM random access memory
- ROM read-only memory
- magnetic disk or an optical disk.
- optical disk A medium that can store program code.
- the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product.
- the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for making
- a computer device which may be a personal computer, server, or network device, etc.
- the foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a RAM, a ROM, a magnetic disk, or an optical disk.
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Abstract
本发明公开一种下行控制信道传输方法、配置方法及终端、基站、计算机存储介质;下行控制信道的传输方法包括:终端根据一次重复传输的最大候选集数量N_total盲检测下行控制信道;其中,最大候选集数量N_total满足以下条件之一:最大候选集数量N_total不大于长期演进(LTE)系统传输终端(legacy UE)单子帧总候选集数量N_legacy;最大候选集数量N_total为LTE系统传输终端单子帧总候选集数量N_legacy与对所述下行控制信道进行盲检测的重复次数的种类的最大值Y的乘积N_legacy×Y;最大候选集数量N_total为以N_legacy与N_legacy×Y为极限值对应的取值集合中的值。
Description
本发明涉及无线通信领域的下行控制信道技术,具体涉及一种无线通讯系统中下行控制信道的传输方法、配置方法及终端、基站及计算机存储介质。
机器类型通信(Machine Type Communication,简称为MTC)用户终端(User Equipment,简称用户设备或终端),又称为机器到机器(Machine to Machine,简称M2M)用户通信设备,是目前物联网的主要应用形式。近年来,由于长期演进(Long-Term Evolution,简称为LTE)/高级长期演进系统(Long-Term Evolution Advance,简称为LTE-Advance或LTE-A)的频谱效率高,越来越多的移动运营商选择LTE/LTE-A作为宽带无线通信系统的演进方向。基于LTE/LTE-A的MTC多种类数据业务也将更具吸引力。
现有的LTE/LTE-A系统是基于每个子帧动态调度进行传输的,即每个子帧均可以传输不同的控制信道。
LTE/LTE-A中定义了物理下行控制信道(Physical Downlink Control Channel,简称为PDCCH)和增强物理下行控制信道(Enhanced Physical Downlink Control Channel,简称为EPDCCH)。物理控制格式指示信道(Physical Control Format Indicator Channel,简称为PCFICH)承载的信息用于指示在一个子帧里传输PDCCH的正交频分复用(Orthogonal Frequency Division Multiplexing,简称为OFDM)符号的数目。物理混合自动重传请求(Automatic Repeat-reQuest,简称为ARQ)指示信道(Physical Hybrid-ARQ Indicator Channel,简称为PHICH)用于承载上行传输数据的肯定应答/否定应答(ACK/NACK)反馈信息。下行控制信道采用盲检测,终端在一定的搜索空间中尝试以不同的聚合等级和候选集解调下行控制信道。
现有UE专有搜索空间如表1和表2所示,搜索空间由不同聚合等级所对应的候选集组成,终端解调控制信道时需要尝试解调各个候选集直至解调正确,否则认为没有接收到属于自己的控制信道。
表1
EPDCCH搜索空间(One Distributed EPDCCH-PRB-set–Case 3)如表2:
表2
PDCCH/EPDCCH用于承载下行控制信息(Downlink Control Information,简称为DCI),包括:上、下行调度信息,以及上行功率控制信息。
通常MTC终端可以通过在每个子帧解调PDCCH/EPDCCH信道获得DCI,以便实现对物理下行共享信道(Physical Downlink Share Channel,简称为PDSCH)的解调和物理上行共享信道(Physical Uplink Share Channel,简称为PUSCH)的调度指示信息。
在MTC应用终端中,有一类终端由于射频接收带宽受限和所处位置或自身特性受限从而导致不能接收全带宽发送的信号和信道以及覆盖性能显著下降。例如智能抄表类MTC终端大多固定安装在地下室等低覆盖性能环境下,其主要发送小包数据,对数据速率的要求低,能够容忍较大的数据传输时延。由于此类终端对数据速率要求低,对于数据信道而言,可以通过更低的调制编码速率以及时域上的多次重复发送等方式来保证小包数据的正确传输。
针对相关技术中在不同重复次数传输的情况下的覆盖增强的MTC终端接收检测控制信道的问题,目前尚无有效地解决方案。
发明内容
本发明提供一种下行控制信道的传输方法、配置方法及终端、基站、计算机存储介质,能够实现基站侧对下行控制信道正确的发送以及终端侧对下行控制信道的检测接收。
本发明实施例的技术方案是这样实现的:
第一方面,本发明实施例提供一种下行控制信道的传输方法,方法包括:
终端根据一次重复传输中的最大候选集数量N_total盲检测下行控制信道;
其中,最大候选集数量N_total满足以下条件之一:
最大候选集数量N_total不大于长期演进(LTE)系统传输终端legacy UE单子帧总候选集数量N_legacy;
最大候选集数量N_total为legacy UE单子帧总候选集数量N_legacy与对所述下行控制信道进行盲检测的重复次数的种类的最大值Y的乘积N_legacy×Y;
最大候选集数量N_total为以N_legacy与N_legacy×Y为极限值的取值集合中的值。
第二方面,本发明实施例提供一种下行控制信道的配置方法,所述方法包括:
基站通过高层信令配置下行控制信道的检测参数集合set(A,B);其中,
A配置表示聚合等级或物理资源块集合PRB数量,B配置表示重复次数、重复等级或覆盖等级;
A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不同,或者A配置为PRB数量隐含得到相应的聚合等级;
B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
第三方面,本发明实施例提供一种终端,所述终端包括:
第一确定单元,配置为确定一次重复传输中的下行控制信道最大候选集数量N_total;
检测单元,配置为根据一次重复传输中的最大候选集数量N_total盲检测下行控制信道;
其中,最大候选集数量N_total满足以下条件之一:
最大候选集数量N_total不大于长期演进(LTE)系统传输终端legacy UE单子帧最大盲检次数N_legacy;
最大候选集数量N_total为LTE系统传输终端legacy UE单子帧总盲检次数N_legacy与对所述下行控制信道进行盲检测的重复次数的种类的最大值N_legacy×Y;
最大候选集数量N_total为以N_legacy与N_legacy×Y为极限值的取值集合中的值。
第四方面,本发明实施例提供一种基站,所述基站包括:
第二确定单元,配置为确定下行控制信道的检测参数集合set(A,B);
配置单元,配置为通过高层信令配置下行控制信道的检测参数集合set(A,B);
其中,A配置表示聚合等级或物理资源块集合PRB数量,B配置表示重复次数、重复等级或覆盖等级;
A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不
同,或者A配置为PRB数量隐含得到相应的聚合等级;
B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
第五方面,本发明实施例提供一种计算机存储介质,所述计算机存储介质中存储有可执行指令,所述可执行指令用于执行本发明实施例提供的下行控制信道的传输方法以及下行控制信道的配置方法。
本发明实施例中,可以保证接收带宽受限的MTC终端在重复传输时盲检测聚合等级和重复次数的接收问题,保证MTC终端正常且有效的通信,通过使用本发明实施例所提供的下行控制信道配置方法、基站、通过高层信令配置下行控制信道的检测参数集合,可以保证基站对下行控制信道的正确发送,解决带宽受限场景和覆盖增强场景中下物理下行控制信道使用多种聚合等级和多种重复次数/等级的传输和检测问题。
图1为本发明实施例中下行控制信道传输方法的实现流程示意图;
图2为本发明实施例中重复次数所对应的候选集示意图一;
图3为本发明实施例中重复次数所对应的候选集示意图二;
图4为本发明实施例中下行控制信道配置方法的实现流程示意图;
图5为本发明实施例中终端的结构示意图;
图6为本发明实施例中基站的结构示意图。
为使本发明的技术方案更加清楚明白,下面结合附图和具体实施例对本发明优选地详细阐述。需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的各种方式可以相互组合。
在接收重复传输的控制信息时,最大盲检次数会随着重复子帧数量呈指数
性增加,因此有必要对盲检路径进行限制。同时由于带宽受限使得PDCCH不可用。常见的限制盲检路径方法为各子帧使用相同的聚合等级以及相同的候选集。由于重复传输次数并不一定是固定值,例如根据信道状况或者终端位置变化导致覆盖性能变化,进而使用重复传输的次数也随之变化,这样终端在接收检测控制信息时,除了检测不同聚合等级,还面临着检测重复次数的问题。因此需要综合考虑重复传输时控制信道盲检测方案设计。
如图1所示,本发明实施例记载的下行控制信道传输方法包括以下步骤:
步骤101,终端确定一次重复传输中的下行控制信道最大候选集数量。
步骤102,终端基于一次重复传输中的最大候选集数量盲检测下行控制信道。
终端对一次重复传输中的下行控制信道最大候选集数量N_total不大于LTE系统传输终端legacy UE单子帧最大盲检次数N_legacy,或者,最大候选集数量N_total为LTE系统传输终端legacy UE单子帧总盲检次数乘以需要检测的重复次数的种类N_total=N_legacy×Y;或者,最大候选集数量N_total为N_legacy≤N_total≤N_legacy×Y。所述最大盲检次数为仅对应用户终端专有搜索空间(USS,UE-specific Search Space)的最大数量、仅对应用户终端公有搜索空间(CSS,Common Search Space)进行盲检测的最大数量、或对应USS和CSS的最大数量。
其中,对所述下行控制信道进行盲检测(本发明实施例中也称为检测)的聚合等级最多为X种,X为大于等于1的整数,X优选1、2、4;
其中,对所述下行控制信道的重复次数进行盲检测的种类最多为Y种,Y为大于等于1的整数,Y优选1、2、4;
其中,X×Y≤Z,Z=(N_total)/2或N_total。下行控制信道的各聚合等级所对应的候选集数量之和的最大值为Z/Y;下行控制信道的各重复次数所对应的候选集数量之和的最大值为Z/X;
终端确定下行控制信道的重复次数和聚合等级的方式包括以下至少之一:终端通过预定义确定;终端通过系统信息块(SIB,System Information Block)
配置确定、终端通过随机接入响应(RAR,Random Access Response)配置确定、终端通过无线资源控制(RRC,Radio Resource Control)信令配置确定。
例如,对于专有搜索空间,在检测两种下行控制信息格式时,Z取值为16,在检测一种下行控制信息格式时,Z取值为32。对于公有搜索空间,在检测两种下行控制信息格式时,Z取值为6,在检测一种下行控制信息格式时,Z取值为12。
所述使用预定义方式确定所述下行控制信道的重复次数和聚合等级时,使用固定的检测参数集合。对于公有消息使用预定义方式,即预定义CSS,具体可能的set(A,B)组合为以下之一:
1).{多个聚合等级、单一重复次数}:
如可能的例子:覆盖等级1时{(AL4\8)、(次数1)}、覆盖等级2时{(AL8\16)、(次数2)}、覆盖等级3时{(AL16\24)、(次数3)};此时由于只有一种重复次数,考虑到6PRB set的特殊性,各聚合等级对应的候选集数量可以与现有搜索空间的候选集数量一致,或少于现有搜索空间的候选集数量。
2).{多个聚合等级、单一重复等级/覆盖等级}:
此时,若一个重复等级/覆盖等级仅对应一个重复次数,则与1相同;如重复等级对应的多个重复次数,则可以在协议中定义好对应表,此时各聚合等级候选集数量需要相应减少。
3).{多个聚合等级、多个重复次数}:
如可能的例子:覆盖等级1时{(AL4\8)、(1、2、4、8)}、覆盖等级2时{(AL8\16)、(10、20、40、80)}、覆盖等级3时{(AL16\24)、(80、100、160、200)}。此时考虑到盲检复杂度不能高于legacy UE,因此在需要盲检多种重复次数的情况下相应减少各聚合等级所对应的候选集。如需要检测4种重复次数时,各聚合等级所对应的候选集之和相应要减少4倍。
4).{1个聚合等级、多个重复次数}如可能的例子:覆盖等级1时{AL8、(1、2、4、8)}、覆盖等级2时{AL16、(10、20、40、80)}、覆盖等级3时{AL24、(80、100、160、200)}。
对于单播消息使用预定义配置,即预定义USS。区别在于CSS所使用的聚合等级集合和重复次数集合通常为USS所使用的聚合等级集合和重复次数集合的子集。使用固定的检测参数集合。具体可能的set(A,B)组合为以下之一:
1).{多个聚合等级、单一重复次数}:
如可能的例子:覆盖等级1时{(AL1\2\4\8)、(次数1)}、覆盖等级2时{(AL2\4\8\16)、(次数2)}、覆盖等级3时{(AL4\8\16\24)、(次数3)};此时由于只有一种重复次数,各聚合等级对应的候选集数量可以与现有搜索空间的候选集数量相当或稍微减少,如考虑到6PRB set的特殊性。
2).{多个聚合等级、单一重复等级/覆盖等级}:
此时,若一个重复等级/覆盖等级仅对应一个重复次数,则与1相同;如重复等级对应的多个重复次数,则可以在协议中定义好对应表,此时各聚合等级候选集数量需要相应减少。
3).{多个聚合等级、多个重复次数}:
如可能的例子:覆盖等级1时{(AL1\2\4\8)、(1、2、4、8)}、覆盖等级2时{(AL2\4\8\16)、(10、20、40、80)}、覆盖等级3时{(AL4\8\16\24)、(80、100、160、200)}。此时考虑到盲检复杂度不能高于legacy UE,因此在需要盲检多种重复次数的情况下需要相应减少各聚合等级所对应的候选集。如需要检测4种重复次数时,各聚合等级所对应的候选集之和相应要减少4倍。考虑到不同覆盖等级的差异,还可以在覆盖等级2、3时减少配置的聚合等级或重复等级数量,即大覆盖等级时减少灵活性,而小覆盖等级时保持灵活性。
4).{1个聚合等级、多个重复次数}:
如可能的例子:覆盖等级1时{AL4、(1、2、4、8)}、覆盖等级2时{AL8、(10、20、40、80)}、覆盖等级3时{AL24、(80、100、160、200)}。
优选地,基站为X种聚合等级分配候选集数量的原则包括以下至少之一:
当X>1时,优先保证大聚合等级的候选集数量可以占满所在物理资源块集合PRB set;此时先配置所能支持的最大聚合等级的候选集数量,且占满所配置的PRB set,其次配置所能支持的次大聚合等级的候选集数量,且占满所配置的
PRB set,直至达到候选集数量之和的最大值。
所检测的X种聚合等级至少有1个候选集;此时分配了Y种聚合等级,需要保证各个聚合等级至少有1个候选集。
当X>1时,小聚合等级分配的候选集数量不小于大聚合等级分配的候选集数量。此时可以采取的一种方式为先配置所能支持的最小聚合等级的候选集数量,且占满所配置的PRB set,其次配置所能支持的次小聚合等级的候选集数量,且占满所配置的PRB set,直至达到候选集数量之和的最大值。
优选地,当所述X=1且聚合等级使用最大聚合等级AL=24增强型控制信道单元(ECCE,Enhanced Control Channel Element)时,占满6PRB set时通过预定义或高层信令配置映射的方式包括以下之一:在所述6PRB set中使用2个子分组分别进行ECCE映射;在所述6PRB set中使用3个子分组分别进行ECCE映射;在所述6PRB set中直接进行ECCE映射;在8PRB set中仅使用6RPB进行ECCE映射;其中所述高层信令使用2比特bit指示上述四种情况之一,或使用1bit指示上述四种情况中任意两种情况之一。
所述6PRB set中使用2个子分组分别进行ECCE映射、且所述2个子分组分别为2PRB和4PRB时,以及所述6PRB set中使用3个子分组分别进行ECCE映射、且所述2个子分组分别为2PRB、2PRB和2PRB时,基于PRB序号的升序,优先选取最小序号PRB所在的子分组进行ECCE映射;
例如,
所述6PRB set中使用2个子分组分别进行ECCE映射、且所述2个子分组分别为2PRB和4PRB时,且最小序号PRB所在分组为2PRB时,先在2PRB中编号0-7ECCE,再在4PRB中编号8-23ECCE;最小序号PRB所在分组为4PRB时,先在4PRB中编号0-15ECCE,再在2PRB中编号16-23ECCE;所述6PRB set包括的所述2个子分组2PRB和4PRB中,所述2PRB在频域的编号低于所述4PRB在频域的编号;
3个子分组分别为2PRB、2PRB和2PRB共3个2PRB,基于PRB序号的升序,依次对应在3个2PRB中编号0-7ECCE、8-15ECCE和16-23ECCE。
例如,在1个set中使用AL=24,在不修改分布式映射的规则时,可以分别按照2PRB的区域和4PRB的区域分别去占满8ECCE和16ECCE,这样也相当于占满24ECCE。即此时set还是一个,但是在ECCE编号时相当于分组,先在2PRB中编号0-7ECCE(LeCCE or DeCCE),再在4PRB中编号8-23ECCE(LeCCE or DeCCE),这样的好处就是DeCCE映射公式不需修改,搜索空间还是24ECCE(6PRB),并且这样分配后还可以与legacy EPDCCH的PRB set复用。
ECCE映射时:对集中式无影响,对分布式分别描述组1和组2内的ECCE映射。
优选地,基站为Y种重复次数分配候选集数量的原则包括以下至少之一:
当Y>1时,最大重复次数的候选集为1;
当Y>1时,第一(小)重复次数的候选集数量不小于第二(大)重复次数的候选集数量,第一重复次数小于所述第二重复次数。
所检测的Y种重复次数中的每种重复次数至少对应有1个候选集。
例如,对于重复次数的候选集而言,各重复次数之间的关系优选为较大重复次数是较小重复次数的倍数,此时最大重复次数的候选集数量为1,较小重复次数的候选集数量是较大重复次数的候选集数量的倍数,如图2所示,重复次数40有1个候选集,重复次数20对应有2个候选集,重复次数10对应有4个候选集;此时所配置的X种聚合等级所对应的候选集数量在不大于单子帧盲检最大此时最多为2或4。
另外,由于盲检重复次数本身增加了盲检的复杂度,需要相应减少聚合等级数量或候选集数量,因此重复次数的候选集数量也需要进行控制,如图3所示,所检测的Y种重复次数至少每个都具有1个候选集,例如,重复次数40有1个候选集,重复次数20有2个候选集,重复次数10有2个候选集;或者重复次数40有1个候选集,重复次数20有1个候选集,重复次数10有1个候选集。此时所配置的X种聚合等级所对应的候选集数量在不大于单子帧盲检最大此时最多为5或10。
优选地下行控制信道的检测参数集合为set(A,B)为基站通过高层信令配置,其中A表示配置的聚合等级或PRB数量,B表示配置的重复次数或重复等级或覆盖等级。
其中A可以为各覆盖条件均配置相同数量的聚合等级但允许部分聚合等级不同,或者配置PRB数量隐含得到相应的聚合等级。其中B可以配置为绝对值或相对值,绝对值为确定的重复次数,相对值为覆盖等级或重复等级所对应的基准重复次数乘以调整量,或为覆盖等级或重复等级所对应的基准重复次数加
减步长量。
例如,配置的集合为set(A,B)其中A表示配置的聚合等级,B表示配置的重复次数。其中B可以配置为绝对值或相对值,绝对值为确定的重复次数,相对值为覆盖等级所对应的基准重复次数乘以调整量或加减步长量。
所配置的参数实例如下:
PRB数量:2、4、6;
聚合等级AL:1、2、4、8、16、24ECCE;
重复等级/覆盖等级,RL1、2、3(对应覆盖提升5、10、15dB或6、12、18dB),这里RL1、2、3可以对应具体的次数,如10、20、80次,可选优选地信令指示可以以该次数为基准进行加减步长N,N可以为2、4、8、10;或者仅表示中间变量,不对应具体次数,每一个RL包含具体次数的集合,如RL1为{1、2、4、8、10、12、16},RL2为{10、12、14、、16、18、20、40、60、80、100},RL3为{80、100、120、140、160、180、200、250、300}。
重复次数:具体的数值,如1、2、4、8、10、12、16、20、40、80、100、、120、140、160、180、200、300等。
下述以B为重复次数绝对值为例进行叙述。下述各表可以各表单独配置,也可以各表混合配置。
例1,配置set(A、B)为4种聚合等级和4种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
4种聚合等级与4种重复次数如表1所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 4种 | {1M、2M、4M、8M} |
| set(1) | 4种 | {10K、20K、40K、80K} |
| set(2) | 4种 | {100L、150L、200L、300L} |
表1
表1所对应的聚合等级和候选集如表1-1或1-2所示。
表1-1
表1-2
例2,配置set(A、B)为4种聚合等级和2种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
4种聚合等级与2种重复次数如表2所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 4种 | {1M、5M} |
| set(1) | 4种 | {4K、20K} |
| set(2) | 4种 | {16L、80L} |
表2
表2所对应的聚合等级和候选集如表2-1或2-2所示。
当重复次数检测2种时,同时聚合等级检测4种,此时各聚合等级的候选集之和为8(上限),因此以“优先保证大聚合等级的候选集可以占满所在PRB set”的原则分配如下表所示:
表2-1
表2-2
例3,配置set(A、B)为4种聚合等级和1种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
4种聚合等级与单重复次数如表3所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 4种 | 1M |
| set(1) | 4种 | 10K |
| set(2) | 4种 | 100L |
表3
表3所对应的聚合等级和候选集如表3-1或3-2所示。
当重复次数检测1种时,同时聚合等级检测4种,此时各聚合等级的候选集之和为16(上限),因此以“优先保证大聚合等级的候选集可以占满所在PRB set”的原则分配如下表所示:
表3-1
表3-2
例4,配置set(A、B)为2种聚合等级和4种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
2种聚合等级与4种重复次数表4所示:
表4
表4所对应的聚合等级和候选集如表4-1或4-2所示。
当重复次数检测4种时,同时聚合等级检测2种,此时各聚合等级的候选集之和为4(上限),因此以“优先保证大聚合等级的候选集可以占满所在PRB set”的原则分配如下表4-1所示:
表4-1
在小覆盖条件时不使用能承载的最大聚合等级,如表4-2所示:
表4-2
例5,配置set(A、B)为2种聚合等级和2种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
2种聚合等级与2种重复次数如表5所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 2种 表5-2配置 | {1M、5M} |
| set(1) | 2种 表5-1配置 | {10K、20K} |
| set(2) | 2种 表5-1配置 | {100L、200L} |
表5
表5所对应的聚合等级和候选集如5-1或5-2所示。
当重复次数检测2种时,同时聚合等级检测2种,此时各聚合等级的候选集之和为8(上限),因此以“优先保证大聚合等级的候选集可以占满所在PRB set”的原则分配如下表5-1所示:
表5-1
或如图表5-2所示,在小覆盖条件时不使用能承载的最大聚合等级;
表5-2
例6,配置set(A、B)为2种聚合等级和1种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
2种聚合等级与1种重复次数如表6所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 2种 表6-2配置 | 1M |
| set(1) | 2种 表6-1配置 | 8K |
| set(2) | 2种 表6-1配置 | 64L |
表6
表6所对应的聚合等级和候选集如表6-1或6-2所示。
当重复次数检测1种时,同时聚合等级检测2种,此时各聚合等级的候选集之和为16(上限),因此以“优先保证大聚合等级的候选集可以占满所在PRB set”的原则分配如下表6-1所示:
表6-1
或如表6-2所示,在小覆盖条件时不使用能承载的最大聚合等级:
表6-2
例7,配置set(A、B)为1种聚合等级和4种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
1种聚合等级与4种重复次数如表7所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 1种 表7-3配置 | {1M、2M、4M、8M} |
| set(1) | 1种 表7-2配置 | {10K、20K、40K、80K} |
| set(2) | 1种 表7-1配置 | {100L、150L、200L、300L} |
表7
表7所对应的聚合等级和候选集如表7-1或7-2或7-3所示。
当重复次数检测4种时,同时聚合等级检测1种,此时各聚合等级的候选集之和为4(上限),因此以“优先使大聚合等级的候选集可以占满所在PRB set”的原则分配如下表所示:
表7-1
在小覆盖条件时使用能承载的较大聚合等级如表7-2所示:
表7-2
或,在小覆盖条件时使用能承载的较小聚合等级如表7-3所示:
表7-3
例8,配置set(A、B)为1种聚合等级和2种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
1种聚合等级与2种重复次数如表8所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 1种 表7-3配置 | {1M、5M} |
| set(1) | 1种 表7-2配置 | {10K、20K} |
| set(2) | 1种 表7-1配置 | {100L、200L} |
表8
表8所对应的聚合等级和候选集如表7-1或7-2或7-3所示。
例9,配置set(A、B)为1种聚合等级和1种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
1种聚合等级与1种重复次数如表9所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 1种 表7-3配置 | 1M |
| set(1) | 1种 表7-2配置 | 10K |
| set(2) | 1种 表7-1配置 | 100L |
表9
表9所对应的聚合等级和候选集如表7-1或7-2或7-3所示。
上述例1-9为单独配置,也可以各表混合配置。如例10所示。
例10,配置set(A、B)为2种聚合等级和1、2、4种重复次数,其中配置的重复次数中优选M=K=L=1,或者M、K、L为不为0整数或分数。
2种聚合等级与1、2、4种重复次数如表10所示:
| 高层信令配置 | 聚合等级 | 重复次数 |
| set(0) | 2种 表4-2配置 | {1M、2M、4M、8M} |
| set(1) | 2种 表4-1配置 | {10K、20K、40K、80K} |
| set(2) | 2种 表4-1配置 | {100L、150L、200L、300L} |
| set(3) | 2种 表5-2配置 | {1M、5M} |
| set(4) | 2种 表5-1配置 | {10K、20K} |
| set(5) | 2种 表5-1配置 | {100L、200L} |
| set(6) | 2种 表6-1配置 | 10K |
| set(7) | 2种 表6-1配置 | 100L |
表10
表10所对应的聚合等级和候选集如表4-1或4-2或5-1或5-2或6-1所示。
例11,对B配置相对值,使用基准值加减步长,或者基准值乘以调整因子,具体覆盖等级/重复等级与基准重复次数的对应表如表11所示。
覆盖等级/重复等级对应的重复次数基准值如表11所示:
| 重复次数 | |
| 覆盖等级/重复等级3 | N3=100 |
| 覆盖等级/重复等级2 | N2=20 |
| 覆盖等级/重复等级1 | N1=5 |
表11
当配置B检测4种重复次数时,同一覆盖等级配置绝对值为{80、90、110、120},配置相对值为{N3-20、N3-10、N3+10、N3+20}、{80%N3、90%N3、110%N3、120%N3}或者{N3/8、N3/4、N3/2、N3};
当配置B检测3种重复次数时,不同覆盖等级配置绝对值为{10、40、200}配置相对值{2N1、2N2、2N3}。
例12,对B配置相对值,使用覆盖等级/重复等级对应重复次数集合的方式,无需加减调整步长或乘以调整因子。具体覆盖等级/重复等级与重复次数集合的对应表如表12所示。
覆盖等级/重复等级与重复次数集合的对应表如表12所示:
| 重复次数 | |
| 覆盖等级/重复等级3 | N3={80、100、120、140} |
| 覆盖等级/重复等级2 | N2={10、20、40、80} |
| 覆盖等级/重复等级1 | N1={2、5、8、10} |
表12
优选地,所述配置的下行控制信道的检测参数集合set(A,B)可以通过配置A和B其中之一,隐含得到A和B中的另一个。
更优选地,所述隐含得到的方法包括但不限于:A与B存在一一对应关系;A与B在数量上乘积小于Z,种类存在一一对应关系。
例如,A与B存在一一对应关系,如小聚合等级对应小重复次数而大聚合等级对应大重复次数,或者小聚合等级对应大重复次数而大聚合等级对应小重复次数。A与B在数量上乘积为N1或之和为N2,种类存在一一对应关系,如配置2种聚合等级,N1=8,则对应4种重复次数,具体2种聚合等级和4种重复次数有一一对应关系;如配置2种聚合等级,N2=4,则对应2种重复次数,具体2种聚合等级和2种重复次数有一一对应关系。
优选地,根据RRC连接是否建立使用不同高层信令配置下行控制信道的检测参数集合,或者根据RRC是否建立配置不同类型的搜索空间。其中高层信令包括SIB、RRC、RAR。搜索空间类型包括USS、CSS。
例如,RRC连接建立前,使用SIB配置CSS,这里的SIB是指无控制传输的SIBx,优选SIB1。配置其他SIBx、RAR、Paging消息的EPDCCH所在的CSS。对于USS,可以使用RAR进行配置。
RRC连接建立后,使用RRC信令配置USS,这里RRC配置,可以与EPDCCH配置合并,即在现有的EPDCCH configuration中添加相关参数即可。如原有配置PRB位置和数量,可以再添加配置{聚合等级、重复次数}。配置时考虑覆盖等级因素配置不同的一组{聚合等级、重复次数}。
1).指示{PRB个数、重复次数}——此时PRB数量与聚合等级集合一一对应。不同覆盖等级时PRB数量与聚合等级一一对应的关系不同(不同覆盖等级时重复次数集合不同)。
2).指示{PRB个数、重复等级}——此时PRB数量与聚合等级集合一一对应,重复等级内所含重复次数集合存在确定的一一对应关系。不同重复等级时PRB数量与聚合等级一一对应的关系不同(不同重复等级时重复次数集合不同)。
3).指示{PRB个数/聚合等级、重复等级、步长/调整因子}——此时具体的重复次数通过重复等级对应的基准重复次数分别{-2倍步长、-1倍步长、+1倍步长、+2倍步长}或者{1/2基准值、3/4基准值、5/4基准值、3/2基准值}确定。不同覆盖等级时步长不同。
优选地,使用高层信令配置时,根据覆盖等级/消息类型/搜索空间类型配置set(A,B)。
优选地,所述对A的指示为对聚合等级、PRB数量指示其中之一或联合指示。其中不同PRB数量与对应使用的聚合等级数量集合是一一对应的。优选地的,在不同覆盖等级时,所述一一对应关系不同,即同一种PRB数量对应的聚合等级数量在不同覆盖等级时可以相同或不同,或者,同一种PRB数量对应的聚合等级数量相同但具体聚合等级种类在不同覆盖等级时可以相同、部分不同或完全不同。
优选地,所述对B的指示为对于重复次数、重复等级、覆盖等级指示其中
之一或联合指示,其中在指示覆盖等级或重复等级时还需要显示指示或隐含确定所对应的基准重复次数乘以调整量或加减步长量。优选地,不同重复等级或覆盖等级对应的基准重复次数是一一对应的,或者不同重复等级或覆盖等级对应的重复次数集合是一一对应的。更优选地,不同重复等级或覆盖等级对应的重复次数集合中的元素允许部分相同。
优选地,所述配置set(A,B)仅配置检测数量,具体检测的聚合等级和重复次数隐含得到。
更优选地,所述隐含策略包括但不限于:根据配置的数量同时结合同一覆盖等级或重复等级与具体数值的对应关系得到具体检测的重复次数或重复次数集合以及聚合等级种类;根据配置的数量同时结合不同覆盖等级或重复等级与具体数值的对应关系得到具体检测的重复次数或重复次数集合以及聚合等级种类;
优选地,所述下行控制信道所在搜索空间为两个PRB set。其中第一个(RPB)set基于固定的一种聚合等级进行配置,第二个set基于固定的一种重复次数进行配置。
例如,频域上可以完全重叠。例如相当于配置第一个set使用1种聚合等级4种重复次数,第二个set使用4种聚合等级1种重复次数。
Set1:1种聚合等级和4种重复次数,例如配置6PRB set,AL=24,重复次数{10、20、40、80},此时重复次数对应的候选集为:
| 重复10次 | 重复20次 | 重复40次 | 重复80次 | |
| 候选集数量 | 1 | 1 | 1 | 1 |
或为:
| 重复10次 | 重复20次 | 重复40次 | 重复80次 | |
| 候选集数量 | 8 | 4 | 2 | 1 |
Set2:4种聚合等级和1种重复次数,例如配置6PRBset,AL=4、8、16、24,重复次数为20次,此时聚合等级对应的候选集为:
| AL4 | AL8 | AL16 | AL24 | |
| 候选集数量 | 1 | 1 | 1 | 1 |
或为:
| AL4 | AL8 | AL16 | AL24 | |
| 候选集数量 | 6 | 3 | 1 | 1 |
优选地,终端通过以下参数至少之一,隐含获得所要检测的聚合等级和重复次数。
覆盖等级、重复等级、下行控制信道的PRB集合和集合内的PRB数量。
更优选地,所述隐含获得方法包括但不限于以下方式之一或其组合:根据覆盖等级或重复等级确定检测的重复次数;所述终端根据覆盖等级或重复等级确定检测的重复次数集合;根据覆盖等级或重复等级确定检测的聚合等级数量和种类;根据配置的PRB集合和集合内的PRB数量确定检测的聚合等级数量和种类;根据检测的重复次数或重复次数集合确定检测的聚合等级数量和种类;根据检测的聚合等级数量和种类确定检测的重复次数或重复次数的集合;
通过使用本发明所提出的下行控制信道传输方法,可以保证接收带宽受限的MTC终端在重复传输时盲检测聚合等级和重复次数的接收问题,保证MTC终端正常且有效的通信。
以下通过具体示例进一步说明。
具体示例1
本实施例对下行控制信道传输采用本发明所提供的方法进行详细描述说明。
在RRC连接尚未建立时,基站通过预定义CSS的set(A,B),其中配置的A、B为绝对值表示的聚合等级和重复次数。
所述set(A,B)为2种聚合等级和4种重复次数,此时基站以小区覆盖最差终端考虑配置覆盖等级3时{2种AL、(80、100、160、200)}。
当重复次数检测4种时,同时聚合等级检测2种,此时各聚合等级的候选
集之和为4(上限),因此以“优先保证大聚合等级的候选集可以占满所在PRB set”的原则分配如下表所示:
表1
终端在盲检测接收下行控制信道时,以4种重复次数80、100、160、200进行检测,并且每种重复次数盲检2种聚合等级,如在配置PRB set为6时检测AL16和24。通过CSS接收RRC连接建立前的控制信息。
在建立RRC连接后,通过RRC信令配置USS的set(A、B),其中配置的A、B为绝对值表示的聚合等级和重复次数。所述set(A,B)为1种聚合等级和3种重复次数。
此时配置的重复次数为重复次数40有1个候选集,重复次数20有2个候选集,重复次数10有4个候选集;此时所配置的1种聚合等级在6PRB set时为AL24、候选集数量为1。通过USS接收RRC连接建立后的控制信息。
通过使用本发明所提出的下行控制信道传输方法,可以保证接收带宽受限的MTC终端在重复传输时分别在RRC连接建立前和建立后盲检测不同配置的聚合等级和重复次数的接收问题,保证MTC终端正常且有效的通信。
具体示例2
本实施例对下行控制信道传输采用本发明所提供的方法进行详细描述说明。
在RRC连接尚未建立时,基站通过系统信息块SIB1配置CSS的set(A,B),其中配置的A、B为绝对值表示的聚合等级和重复次数。
所述set(A,B)为2种聚合等级和4种重复次数,如例4所示,其中
M=K=L=1。
2种聚合等级与4种重复次数如表4所示:
表4
表4所对应的聚合等级和候选集如表4-1或4-2所示。
当重复次数检测4种时,同时聚合等级检测2种,此时各聚合等级的候选集之和为4(上限),因此以“优先保证大聚合等级的候选集可以占满所在PRB set”的原则分配如下表4-1所示:
表4-1
或,在小覆盖条件时不使用能承载的最大聚合等级如表4-2所示:
表4-2
终端在盲检测接收下行控制信道时,如接收配置为set(1),此时PRB set为6PRB,以4种重复次数10、20、40、80进行检测,并且每种重复次数盲检2种聚合等级AL16和24。通过CSS接收RRC连接建立前的控制信息。
在建立RRC连接后,通过RRC信令配置USS的set(A、B),其中配置的B为相对值表示的重复次数。所述set(A,B)为4种聚合等级和4种重复次数。
对B配置相对值,使用基准值加减步长,具体覆盖等级/重复等级与基准重复次数的对应表如表11所示:
| 重复次数 | |
| 覆盖等级/重复等级3 | N3=100 |
| 覆盖等级/重复等级2 | N2=20 |
| 覆盖等级/重复等级1 | N1=5 |
表11
当配置B检测4种重复次数时,配置相对值如表13所示,其中配置的调整步长优选M=1,K=5,L=10。
4种聚合等级与4种重复次数如表13所示:
表13
表13所对应的聚合等级和候选集如表1-1或1-2所示。
表1-1
表1-2
终端在盲检测接收下行控制信道时,如接收配置为set(2),此时PRB set为6PRB,以4种重复次数80、90、110、120进行检测,并且每种重复次数盲检4种聚合等级AL4、8、16和24。通过USS接收RRC连接建立后的控制信息。
此时配置的重复次数为重复次数40有1个候选集,重复次数20有2个候选集,重复次数10有4个候选集;此时所配置的1种聚合等级在6PRB set时为AL24、候选集数量为1。通过USS接收RRC连接建立后的控制信息。
优选地,在终端检测出的下行控制信道的重复次数之后,所述终端还可以根据实际检测出的下行控制信道的重复次数、以及所述下行控制信道的重复次数与其他信道的重复次数的对应关系,隐含确定其他信道对应的重复次数,所述其他信道包括以下至少之一:下行业务信道(PDSCH)、上行业务信道(PUSCH)和上行控制信道(PUCCH)。
说明书中添加以下内容,根据不同信道间重复次数的对应关系如表14所示
| 对应关系 | EPDCCH | PDSCH | PUSCH | PUCCH |
| 重复次数 | N1 | N2 | N3 | N4 |
| 例1 | 100 | 300 | 200 | 20 |
| 例2 | 10 | 20 | 20 | 2 |
表14
例如,其中下行控制信道的重复次数配置了多种,但终端实际只检测出确定的一种,根据检测出的EPDCCH的重复次数(唯一确定的一种)进一步根据重复次数对应关系表隐含得到PDSCH的重复次数。
与上述的应用于终端侧的下行控制信道发送方法对应地,本发明实施例还记载一种下行控制信道的配置方法,应用于基站侧,如图4所示,包括以下步骤:
步骤201,基站确定下行控制信道的检测参数集合set(A,B)。
步骤202,通过高层信令配置下行控制信道的检测参数集合set(A,B)。
其中,A配置表示聚合等级或物理资源块集合PRB数量,B配置表示重复次数、重复等级或覆盖等级。
A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不同,或者A配置为PRB数量隐含得到相应的聚合等级;
B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
优选地,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:
所述基站根据RRC连接是否建立使用不同高层信令配置所述下行控制信道的检测参数集合,所述基站根据RRC是否建立配置所述下行控制信道的不同类型的搜索空间,所述高层信令包括SIB、RRC和RAR,所述搜索空间类型包括USS和CSS。
优选地,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:
所述基站使用高层信令配置时根据覆盖等级、消息类型和搜索空间类型中
的至少一个进行配置所述set(A,B)。
优选地,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:
所述基站对A的指示采用以下方式:采用聚合等级、PRB数量指示其中之一或联合指示,其中不同PRB数量对应使用的聚合等级数量集合存在一一对应关系。
优选地,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:
在所述基站对A的指示为不同覆盖等级时,所述不同PRB数量与对应使用的聚合等级数量集合存在的一一对应关系不同;其中,同一种PRB数量对应的聚合等级数量在不同覆盖等级时相同或不同,或者同一种PRB数量对应的聚合等级数量相同,且具体聚合等级种类在不同覆盖等级时相同、部分不同或完全不同。
优选地,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:
所述基站对B采用以下指示方式:将采用重复次数、重复等级、覆盖等级、调整量和步长量指示其中之一或联合指示。
优选地,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:
所述基站指示不同重复等级或覆盖等级与基准重复次数存在一一对应关系;不同重复等级或覆盖等级与重复次数集合一一对应;不同重复等级或覆盖等级与重复次数存在一一对应关系。
与上述的应用于终端侧的下行控制信道发送方法对应地,本发明实施例还记载一种终端,如图5所示,包括:
第一确定单元10,配置为确定一次重复传输中的下行控制信道最大候选集数量N_total;
检测单元20,配置为根据一次重复传输中的最大候选集数量N_total进行
检测下行控制信道;
其中,最大候选集数量N_total满足以下条件之一:
最大候选集数量N_total不大于legacy UE单子帧最大盲检次数N_legacy;
最大候选集数量N_total为legacy UE单子帧总盲检次数N_legacy与对所述下行控制信道进行盲检测的重复次数的种类的最大值N_legacy×Y;
最大候选集数量N_total为N_legacy与N_legacy×Y对应的取值集合中的值。
优选地,所述最大盲检次数为仅对应USS进行盲检测的最大数量、仅对应CSS进行盲检测的最大数量、或对应USS和CSS进行盲检测的最大数量。
优选地,对所述下行控制信道进行检测使用的聚合等级最多为X种,X为大于等于1的整数;Y为大于等于1的整数。
优选地,X与Y满足:X×Y≤Z,Z取值为(N_total)/2或N_total。
优选地,所述下行控制信道的各聚合等级所对应的候选集数量之和的最大值为Z/Y;所述下行控制信道的各重复次数所对应的候选集数量之和的最大值为Z/X。
优选地,对所述下行控制信道进行检测使用的重复次数和聚合等级的确定方式包括以下至少之一:预定义;SIB配置;RAR配置;RRC信令配置。
优选地,为所述X种聚合等级分配候选集数量的原则采用以下至少之一:
当X>1时,优先保证高聚合等级的候选集数量占满所在物理资源块集合PRB set;
当X>1时,第一聚合等级分配的候选集数量不小于第二聚合等级分配的候选集数量;其中,所检测的X种聚合等级至少有1个候选集,第一聚合等级所占用的资源小于第二聚合等级所占用的资源。
优选地,当所述X为1、聚合等级使用最大聚合等级AL为24ECCE增强型控制信道单元、且搜索空间占满6PRB set时,基站通过预定义配置为2个或3个子分组分别进行ECCE映射,或者通过高层信令配置为2个或3个子分组分别进行ECCE映射;
其中2个子分组分别为2PRB和4PRB,基于PRB序号的升序,优先选取PRB最小的子分组进行ECCE映射。
优选地,基站为所述Y种重复次数分配候选集数量的原则包括以下至少之一:
当Y>1时,最大重复次数的候选集为1;
当Y>1时,第一重复次数的候选集数量不小于第二重复次数的候选集数量,所述第一重复次数小于所述第二重复次数;其中,所检测的Y种重复次数的每种重复次数至少有1个候选集。
优选地,所述下行控制信道的检测参数集合为set(A,B)为基站通过高层信令配置;其中,A表示配置的聚合等级或PRB数量,B表示配置的重复次数、重复等级或覆盖等级;
A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不同,或者A配置为PRB数量隐含得到相应的聚合等级;
B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
优选地,所述检测单元20还配置为通过A与B的隐含关系,通过配置A和B中的一个,隐含得到A和B中的另一个。
优选地,所述A与B的隐含关系包括:A与B存在一一对应关系;A与B在数量上乘积为N1或之和为N2,A与B种类存在一一对应关系。
优选地,所述下行控制信道的检测参数集合由基站根据RRC连接是否建立使用不同高层信令配置,不同类型的所述搜索空间由所述基站根据RRC是否建立配置,所述高层信令包括SIB、RRC和RAR,所述搜索空间类型包括USS和CSS。
优选地,所述set(A,B)由所述基站使用高层信令配置时根据覆盖等级、消息类型和搜索空间类型中的至少一个进行配置。
优选地,所述第一确定单元10还配置为获取基站对A的指示,基站对A
的指示为对聚合等级、PRB数量指示其中之一或联合指示,其中不同PRB数量对应使用的聚合等级数量集合存在一一对应关系。
优选地,在所述基站对A的指示为不同覆盖等级时,所述不同PRB数量与对应使用的聚合等级数量集合存在的一一对应关系不同;其中,
同一种PRB数量对应的聚合等级数量在不同覆盖等级时相同或不同;或者,同一种PRB数量对应的聚合等级数量相同,且,具体聚合等级种类在不同覆盖等级时相同、部分不同或完全不同。
优选地,所述第一确定单元10还配置为获取基站对B的指示,基站对B的指示为对于重复次数、重复等级、覆盖等级、调整量和步长量指示其中之一或联合指示;其中,
所述第一确定单元10还配置为获取所述基站显式指示的重复次数;或者,利用所述基站联合指示的覆盖等级、重复等级调整量和步长量,利用隐含关系确定所述终端指示的重复等级和/或覆盖等级所对应的基准重复次数,并利用所述基准重复次数乘以所述调整量得到所述重复次数,或利用所述基准重复次数加减所述步长量的得到所述重复次数。
优选地,所述隐含关系包括:
不同重复等级或覆盖等级与基准重复次数存在一一对应关系;不同重复等级或覆盖等级与重复次数集合存在一一对应关系;不同重复等级或覆盖等级对应的重复次数集合中的元素部分相同。
优选地,所述第一确定单元10还配置为当基站配置set(A,B)且仅配置检测数量时,基于隐含策略得到检测的聚合等级和重复次数。
优选地,所述第一确定单元10基于隐含策略得到检测的聚合等级和重复次数,包括采用以下隐含策略至少之一:
根据配置的数量并结合同一重复等级与重复次数的具体数值的对应关系得到具体检测的重复次数集合和聚合等级种类;
所述终端根据配置的数量、并结合不同覆盖等级与重复次数的具体数值的对应关系得到具体检测的重复次数以及聚合等级种类;
根据配置的数量、并结合不同覆盖等级或重复等级与具体数值的对应关系得到具体检测的重复次数集合以及聚合等级种类。
优选地,所述下行控制信道所在搜索空间为两个PRB set,其中第一个PRBset基于固定的一种聚合等级进行配置,第二个PRB set基于固定的一种重复次数进行配置。
优选地,所述检测单元20还配置为通过以下参数至少之一,获得所要检测的聚合等级和重复次数:覆盖等级、重复等级、下行控制信道的PRB集合和集合内的PRB数量。
优选地,所述检测单元20还配置为采用以下方式至少之一获得所要检测的聚合等级和重复次数:
根据覆盖等级或重复等级确定检测的重复次数;
根据覆盖等级或重复等级确定检测的重复次数集合;
根据覆盖等级或重复等级确定检测的聚合等级数量和种类;
根据配置的PRB集合和集合内的PRB数量确定检测的聚合等级数量和种类;
根据检测的重复次数或重复次数集合确定检测的聚合等级数量和种类;
根据检测的聚合等级数量和种类确定检测的重复次数或重复次数的集合。
作为一个实施方式,所述检测单元20还配置为根据实际检测出的下行控制信道的重复次数、以及所述下行控制信道的重复次数与其他信道的重复次数的对应关系,隐含确定信道对应的重复次数,所述其他信道包括以下至少之一:下行业务信道、上行业务信道和上行控制信道。
终端中的各单元可由处理器、微处理器(MCU)、逻辑可编程门阵列(FPGA)或专用集成电路(ASIC)实现。
与上述的应用于基站侧的下行控制信道的配置方法对应地,本发明实施例还记载一种基站,如图6所示,包括:
第二确定单元30,配置为确定下行控制信道的检测参数集合set(A,B);
配置单元40,配置为通过高层信令配置下行控制信道的检测参数集合set
(A,B);
其中,A配置表示聚合等级或物理资源块集合PRB数量,B配置表示重复次数、重复等级或覆盖等级;
A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不同,或者A配置为PRB数量隐含得到相应的聚合等级;
B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
优选地,所述配置单元40还配置为根据RRC连接是否建立使用不同高层信令配置所述下行控制信道的检测参数集合,根据RRC是否建立配置所述下行控制信道的不同类型的搜索空间,所述高层信令包括SIB、RRC和RAR,所述搜索空间类型包括USS和CSS。
优选地,所述配置单元40还配置为使用高层信令配置时根据覆盖等级、消息类型和搜索空间类型中的至少一个进行配置所述set(A,B)。
优选地,所述配置单元40还配置为对A的指示采用以下方式:采用聚合等级、PRB数量指示其中之一或联合指示,其中不同PRB数量与对应使用的聚合等级数量集合之间存在一一对应关系。
优选地,在所述基站对A的指示为不不同覆盖等级时,所述不同PRB数量与对应使用的聚合等级数量集合存在的一一对应关系不同;其中,同一种PRB数量对应的聚合等级数量在不同覆盖等级时相同或不同,或者同一种PRB数量对应的聚合等级数量相同,且具体聚合等级种类在不同覆盖等级时相同、部分不同或完全不同。
优选地,所述配置单元40还配置为对B采用以下指示方式:将重复次数、重复等级、覆盖等级、调整量和步长量指示其中之一或联合指示。
优选地,不同重复等级或覆盖等级与基准重复次数一一对应;不同重复等级或覆盖等级与重复次数集合一一对应;不同重复等级或覆盖等级对应的重复次数。
基站中的各单元可由处理器、微处理器(MCU)、逻辑可编程门阵列(FPGA)或专用集成电路(ASIC)实现。
通过使用本发明所提出的下行控制信道传输方法、配置方法及终端、基站,可以保证接收带宽受限的MTC终端在重复传输时分别在RRC连接建立前和建立后盲检测不同配置的聚合等级和重复次数的接收问题,保证MTC终端正常且有效的通信。
本发明实施例还提供一种计算机存储介质,所述计算机存储介质中存储有可执行指令,所述可执行指令用于执行图1所示的下行控制信道的传输方法,或执行图4所示的下行控制信道的配置方法。
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:移动存储设备、随机存取存储器(RAM,Random Access Memory)、只读存储器(ROM,Read-Only Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
或者,本发明上述集成的单元如果以软件功能模块的形式实现并作为独立的产品销售或使用时,也可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明实施例的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括:移动存储设备、RAM、ROM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (66)
- 一种下行控制信道的传输方法,所述方法包括:终端根据一次重复传输中的最大候选集数量N_total盲检测下行控制信道;其中,所述最大候选集数量N_total满足以下条件之一:所述最大候选集数量N_total不大于长期演进LTE系统传输终端legacy UE单子帧总候选集数量N_legacy;所述最大候选集数量N_total为legacy UE单子帧总候选集数量N_legacy与对所述下行控制信道进行盲检测的重复次数的种类的最大值Y的乘积N_legacy×Y;所述最大候选集数量N_total为以N_legacy与N_legacy×Y为极限值的取值集合中的值。
- 根据权利要求1所述的方法,其中,所述最大候选集数量为仅对应用户终端专有搜索空间USS中的最大数量、仅对应公有搜索空间CSS中的最大数量、或对应USS和CSS的最大数量。
- 根据权利要求1所述的方法,其中,对所述下行控制信道进行检测使用的聚合等级最多为X种,X为大于等于1的整数;Y为大于等于1的整数;X与Y满足:X×Y≤Z,Z取值为(N_total)/k,其中k为大于等于1的整数。
- 根据权利要求3所述的方法,其中,所述下行控制信道的各聚合等级所对应的候选集数量之和的最大值为Z/Y;所述下行控制信道的各重复次数所对应的候选集数量之和的最大值为Z/X。
- 根据权利要求1所述的方法,其中,对所述下行控制信道进行检测使用的重复次数和聚合等级的确定方式包括以下至少之一:预定义;系统信息块SIB配置;随机接入响应RAR配置;无 线资源控制RRC信令配置。
- 根据权利要求3所述的方法,其中,所述X种聚合等级被分配候选集数量的原则包括以下至少之一:当X>1时,优先使高聚合等级的候选集数量占满所在物理资源块集合PRB set;当X>1时,第一聚合等级分配的候选集数量不小于第二聚合等级分配的候选集数量,其中第一聚合等级所占用的资源小于第二聚合等级所占用的资源;所检测的X种聚合等级中的每种聚合等级至少对应1个候选集。
- 根据权利要求3所述的方法,其中,当所述X为1、聚合等级使用最大聚合等级AL为24ECCE增强型控制信道单元、且搜索空间占满6PRB set时,所述6PRB set为通过预定义或高层信令配置映射,且配置映射的方式包括以下之一:在所述6PRB set中使用2个子分组分别进行ECCE映射;在所述6PRB set中使用3个子分组分别进行ECCE映射;在所述6PRB set中直接进行ECCE映射;在8PRB set中仅使用6RPB进行ECCE映射;其中所述高层信令使用2比特bit指示上述四种情况之一,或使用1bit指示上述四种情况中任意两种情况之一。
- 根据权利要求7所述的方法,其中,所述6PRB set中使用2个子分组分别进行ECCE映射、且所述2个子分组分别为2PRB和4PRB时,以及所述6PRB set中使用3个子分组分别进行ECCE映射且所述3个子分组分别为2PRB、2PRB和2PRB时,基于PRB序号的升序,优先选取最小序号PRB所在的子分组进行ECCE映射;所述基于PRB序号的升序,优先选取最小序号PRB所在的子分组进行ECCE映射,包括:所述6PRB set中使用2个子分组分别进行ECCE映射、所述2个子分组分别为2PRB和4PRB,且所述最小序号PRB所在的子分组为2PRB时,在所述 2PRB中编号0-7ECCE,在所述4PRB中编号8-23ECCE:所述6PRB set包括的所述2个子分组2PRB和4PRB中,所述2PRB在频域的编号低于所述4PRB在频域的编号。
- 根据权利要求1所述的方法,其中,为所述Y种重复次数分配候选集数量的原则包括以下至少之一:当Y>1时,最大重复次数的候选集为1;当Y>1时,第一重复次数的候选集数量不小于第二重复次数的候选集数量,所述第一重复次数小于所述第二重复次数;所检测的Y种重复次数中的每种重复次数至少对应有1个候选集。
- 根据权利要求3所述的方法,其中,所述下行控制信道的检测参数集合set(A,B)为基站通过高层信令配置;其中,多种不同的所述set(A,B)对应具有不同的编号,所述高层信令通过指示一个所述编号配置与所述编号对应的set(A,B);所述A表示配置的聚合等级或PRB数量,所述B表示配置的重复次数、重复等级或覆盖等级。
- 根据权利要求10所述的方法,其中,所述A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不同,或者A配置为PRB数量隐含得到相应的聚合等级;所述B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
- 根据权利要求10所述的方法,其中,所述方法还包括:所述终端通过所述A与所述B的隐含关系,通过配置所述A和所述B中的一个,隐含得到所述A和所述B中的另一个。
- 根据权利要求12所述的方法,其中,所述A与B的隐含关系包括:A与B存在一一对应关系;A与B在数量上乘积为N1或之和为N2;A与B种类存在一一对应关系。
- 根据权利要求10所述的方法,其中,所述下行控制信道的检测参数集合set(A,B)由所述基站根据RRC连接是否建立使用不同高层信令配置,不同类型的所述搜索空间由所述基站根据RRC是否建立配置,所述高层信令包括SIB、RRC和RAR,所述搜索空间类型包括USS和CSS。
- 根据权利要求10所述的方法,其中,所述下行控制信道的检测参数集合set(A,B)由所述基站使用高层信令配置时根据覆盖等级、消息类型和搜索空间类型中的至少一个进行配置。
- 根据权利要求10所述的方法,其中,所述方法还包括:获取所述基站对A的指示,所述基站对A的指示为对聚合等级、PRB数量指示其中之一或联合指示,其中不同PRB数量与对应使用的聚合等级数量集合存在一一对应关系。
- 根据权利要求16所述的方法,其中,所述覆盖等级不同时,所述不同PRB数量与对应使用的聚合等级数量集合存在的所述一一对应关系不同;其中,同一种PRB数量对应的聚合等级数量在不同覆盖等级时相同或不同;或者,同一种PRB数量对应的聚合等级数量相同,且,所述聚合等级种类在不同覆盖等级时相同、部分不同或完全不同。
- 根据权利要求10所述的方法,其中,所述方法还包括:获取所述基站对B的指示,所述基站对B的指示为对于重复次数、重复等级、覆盖等级、调整量和步长量指示其中之一或联合指示;所述终端获取所述基站显式指示的重复次数;或者,所述终端利用所述基站联合指示的重复等级、覆盖等级、调整量和步长量,利用隐含关系确定所述终端指示的重复等级和/或覆盖等级所对应的基准重复次数,并利用所述基准重复次数乘以所述调整量得到所述重复次数,或利用所述基准重复次数加减所述步长量的得到所述重复次数。
- 根据权利要求18所述的方法,其中,所述隐含关系包括以下之一:不同重复等级或覆盖等级与基准重复次数存在一一对应关系;不同重复等级或覆盖等级与重复次数集合存在一一对应关系;不同重复等级或覆盖等级对应的重复次数集合中的元素部分相同。
- 根据权利要求10所述的方法,其中,所述方法还包括:当所述基站配置set(A,B)且仅配置检测聚合等级的数量和重复次数的数量时,所述终端基于隐含策略得到检测的聚合等级和重复次数。
- 根据权利要求20所述的方法,其中,所述终端基于隐含策略得到检测的聚合等级和重复次数,包括采用以下隐含策略至少之一:根据配置的数量并结合同一覆盖等级与重复次数的数值的对应关系得到检测的重复次数和聚合等级种类;根据配置的数量并结合同一重复等级与重复次数的数值的对应关系得到检测的重复次数集合和聚合等级种类;根据配置的数量并结合不同覆盖等级与重复次数的数值的对应关系得到检测的重复次数以及聚合等级种类;根据配置的数量并结合不同覆盖等级或重复等级与数值的对应关系得到检测的重复次数集合以及聚合等级种类。
- 根据权利要求1所述的方法,其中,所述下行控制信道所在搜索空间为两个PRB set,其中第一个PRB set基于固定的一种聚合等级进行配置,第二个PRB set基于固定的一种重复次数进行配置。
- 根据权利要求1所述的方法,其中,所述终端通过以下参数至少之一,获得所要检测的聚合等级和重复次数:覆盖等级、重复等级、下行控制信道的PRB集合和所述PRB集合内的PRB数量。
- 根据权利要求23所述的方法,其中,所述终端通过以下参数至少之一,获得所要检测的聚合等级和重复次数:覆盖等级、重复等级、下行控制信道的PRB集合和集合内的PRB数量,包括采用以下方式至少之一:所述终端根据覆盖等级或重复等级确定检测的重复次数;所述终端根据覆盖等级或重复等级确定检测的重复次数集合;所述终端根据覆盖等级或重复等级确定检测的聚合等级数量和种类;所述终端根据配置的PRB集合和集合内的PRB数量确定检测的聚合等级数量和种类;所述终端根据检测的重复次数或重复次数集合确定检测的聚合等级数量和种类;所述终端根据检测的聚合等级数量和种类确定检测的重复次数或重复次数的集合。
- 根据权利要求1至24任一项所述的方法,其中,所述方法还包括:所述终端根据实际检测出的下行控制信道的重复次数、以及所述下行控制信道的重复次数与其他信道的重复次数的对应关系,隐含确定其他信道对应的重复次数,所述其他信道包括以下至少之一:下行业务信道、上行业务信道和上行控制信道。
- 一种下行控制信道的配置方法,所述方法包括:基站通过高层信令配置下行控制信道的检测参数集合set(A,B);其中,A配置表示聚合等级或物理资源块集合PRB数量,B配置表示重复次数、重复等级或覆盖等级;A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不同,或者A配置为PRB数量隐含得到相应的聚合等级;B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
- 根据权利要求26所述的方法,其中,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:所述基站根据无线资源控制协议RRC连接是否建立使用不同高层信令配置所述下行控制信道的检测参数集合,所述基站根据RRC是否建立配置所述下行控制信道的不同类型的搜索空间,所述高层信令包括SIB、RRC和随机接入响应RAR,所述搜索空间类型包括用户终端专有搜索空间USS和公有搜索空间CSS。
- 根据权利要求26所述的方法,其中,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:所述基站使用高层信令配置时根据覆盖等级、消息类型和搜索空间类型中的至少一个进行配置所述set(A,B)。
- 根据权利要求26所述的方法,其中,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:所述基站对A的指示采用以下方式:采用聚合等级、PRB数量指示其中之一或联合指示,其中不同PRB数量对应使用的聚合等级数量集合存在一一对应关系。
- 根据权利要求29所述的方法,其中,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:在所述基站对A的指示为不同覆盖等级时,所述不同PRB数量与对应使用的聚合等级数量集合存在的一一对应关系不同;同一种PRB数量对应的聚合等级数量在不同覆盖等级时相同或不同;或者,同一种PRB数量对应的聚合等级数量相同,且,聚合等级种类在不同覆盖等级时相同、部分不同或完全不同。
- 根据权利要求26所述的方法,其中,所述基站通过高层信令配置所述下行控制信道的检测参数集合set(A,B),包括:所述基站对B采用以下指示方式:将重复次数、重复等级、覆盖等级、调整量和步长量指示其中之一或联合指示。
- 根据权利要求26至31任一项所述的方法,其中,所述重复等级或覆盖等级满足以下隐含关系之一:不同重复等级或覆盖等级与基准重复次数存在一一对应关系;不同重复等级或覆盖等级与重复次数集合存在一一对应关系;不同重复等级或覆盖等级与重复次数存在一一对应关系。
- 一种终端,所述终端包括:第一确定单元,配置为确定一次重复传输中的下行控制信道最大候选集数 量N_total;检测单元,配置为根据一次重复传输中的最大候选集数量N_total盲检测下行控制信道;其中,最大候选集数量N_total满足以下条件之一:最大候选集数量N_total不大于长期演进LTE系统传输终端legacy UE单子帧最大盲检次数N_legacy;最大候选集数量N_total为LTE系统传输终端legacy UE单子帧总盲检次数N_legacy与对所述下行控制信道进行盲检测的重复次数的种类的最大值N_legacy×Y;最大候选集数量N_total为以N_legacy与N_legacy×Y为极限值的取值集合中的值。
- 根据权利要求33所述的终端,其中,所述最大候选集数量为仅对应用户终端专有搜索空间USS中的最大数量、仅对应公有搜索空间CSS中的最大数量、或对应USS和CSS的最大数量。
- 根据权利要求33所述的终端,其中,所述检测单元对所述下行控制信道的进行检测使用的聚合等级最多X种,X为大于等于1的整数;Y为大于等于1的整数;X与Y满足:X×Y≤Z,Z取值为(N_total)/2或N_total。
- 根据权利要求35所述的终端,其中,所述下行控制信道的各聚合等级所对应的候选集数量之和的最大值为Z/Y;所述下行控制信道的各重复次数所对应的候选集数量之和的最大值为Z/X。
- 根据权利要求33所述的终端,其中,所述第一确定单元还配置采用以下方式至少之一确定对所述下行控制信道进行检测的重复次数和聚合等级:预定义;系统信息块SIB配置;随机接入响应RAR配置;无线资源控制RRC信令配置。
- 根据权利要求35所述的终端,其中,所述X种聚合等级被分配候选 集数量的原则采用以下至少之一:当X>1时,优先使高聚合等级的候选集数量占满所在物理资源块集合PRB set;当X>1时,第一聚合等级分配的候选集数量不小于第二聚合等级分配的候选集数量;其中,所检测的X种聚合等级至少有1个候选集,其中第一聚合等级所占用的资源小于第二聚合等级所占用的资源。
- 根据权利要求35所述的终端,其中,当所述X为1、所述检测单元对所述下行控制信道的进行检测使用的聚合等级采用最大聚合等级AL为24ECCE增强型控制信道单元、且搜索空间占满6PRB set时,所述6PRB set为通过预定义或高层信令配置映射,且配置映射的方式包括以下之一:在所述6PRB set中使用2个子分组分别进行ECCE映射;在所述6PRB set中使用3个子分组分别进行ECCE映射;在所述6PRB set中直接进行ECCE映射;在8PRB set中仅使用6RPB进行ECCE映射;其中所述高层信令使用2比特bit指示上述四种情况之一,或使用1bit指示上述四种情况中任意两种情况之一。
- 根据权利要求39所述的终端,其中,所述6PRB set中使用2个子分组分别进行ECCE映射、且所述2个子分组分别为2PRB和4PRB时,所述6PRB set中使用3个子分组分别进行ECCE映射、且所述2个子分组分别为2PRB、2PRB和2PRB时,基于PRB序号的升序,优先选取最小序号PRB所在的子分组进行ECCE映射;所述6PRB set中使用2个子分组分别进行ECCE映射、所述2个子分组分别为2PRB和4PRB,且所述最小序号PRB所在的子分组为2PRB时,在所述2PRB中编号0-7ECCE,在所述4PRB中编号8-23ECCE:所述6PRB set包括的所述2个子分组2PRB和4PRB中,所述2PRB在频域的编号低于所述4PRB在频域的编号。
- 根据权利要求33所述的终端,其中,为所述Y种重复次数分配候选集数量的原则包括以下至少之一:当Y>1时,最大重复次数的候选集为1;当Y>1时,第一重复次数的候选集数量不小于第二重复次数的候选集数量,所述第一重复次数小于所述第二重复次数;其中,所检测的Y种重复次数中至少对应有1个候选集。
- 根据权利要求35所述的终端,其中,所述下行控制信道的检测参数集合set(A,B)为基站通过高层信令配置;其中,多种不同的所述set(A,B)对应具有不同的编号,所述高层信令通过指示一个所述编号配置与所述编号对应的set(A,B);所述A表示配置的聚合等级或PRB数量,所述B表示配置的重复次数、重复等级或覆盖等级。
- 根据权利要求42所述的终端,其中,所述A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不同,或者A配置为PRB数量隐含得到相应的聚合等级;所述B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
- 根据权利要求42所述的终端,其中,所述检测单元还配置为通过所述A与所述B的隐含关系,通过配置所述A和所述B中的一个,隐含得到所述A和所述B中的另一个。
- 根据权利要求43所述的终端,其中,所述A与所述B的隐含关系包括:所述A与所述B存在一一对应关系;所述A与所述B在数量上乘积为N1或之和为N2;所述A与所述B种类存在一一对应关系。
- 根据权利要求42所述的终端,其中,所述下行控制信道的检测参数集合set(A,B)由所述基站根据RRC连接是否建立使用不同高层信令配置,不同类型的所述搜索空间由所述所述基站根 据RRC是否建立配置,所述高层信令包括SIB、RRC和RAR,所述搜索空间类型包括USS和CSS。
- 根据权利要求42所述的终端,其中,所述下行控制信道的检测参数集合set(A,B)由所述基站使用高层信令配置时根据覆盖等级、消息类型和搜索空间类型中的至少一个进行配置。
- 根据权利要求42所述的终端,其中,所述第一确定单元还配置为获取所述基站对A的指示,所述基站对A的指示为对聚合等级、PRB数量指示其中之一或联合指示,其中不同PRB数量与对应使用的聚合等级数量集合存在一一对应关系。
- 根据权利要求47所述的终端,其中,所述覆盖等级不同时,所述不同PRB数量与对应使用的聚合等级数量集合存在的所述一一对应关系不同;其中,同一种PRB数量对应的聚合等级数量在不同覆盖等级时相同或不同;或者,同一种PRB数量对应的聚合等级数量相同,且,所述聚合等级种类在不同覆盖等级时相同、部分不同或完全不同。
- 根据权利要求42所述的终端,其中,所述第一确定单元还配置为获取所述基站对B的指示,所述基站对B的指示为对于重复次数、重复等级、覆盖等级、调整量和步长量指示其中之一或联合指示;其中,所述第一确定单元配置为获取所述基站显式指示的重复次数;或者,利用所述基站联合指示覆盖等级、重复等级调整量和步长量,利用隐含关系确定所述终端指示的重复等级和/或覆盖等级所对应的基准重复次数,并利用所述基准重复次数乘以所述调整量得到所述重复次数,或利用所述基准重复次数加减所述步长量的得到所述重复次数。
- 根据权利要求50所述的终端,其中,所述隐含关系包括:不同重复等级或覆盖等级与基准重复次数存在一一对应关系;不同重复等级或覆盖等级与重复次数集合存在一一对应关系;不同重复等级或覆盖等级对应的重复次数集合中的元素部分相同。
- 根据权利要求42所述的终端,其中,所述第一确定单元还配置为当所 述基站配置set(A,B)且仅配置检测聚合等级的数量和重复次数的数量时,基于隐含策略得到检测的聚合等级和重复次数。
- 根据权利要求52所述的终端,其中,所述第一确定单元还用于基于隐含策略得到检测的聚合等级和重复次数时,采用以下隐含策略至少之一:根据配置的数量、并结合同一覆盖等级与重复次数的数值的对应关系得到检测的重复次数和聚合等级种类;根据配置的数量并结合同一重复等级与重复次数的数值的对应关系得到具体检测的重复次数集合和聚合等级种类;根据配置的数量、并结合不同覆盖等级与重复次数的数值的对应关系得到具体检测的重复次数以及聚合等级种类;根据配置的数量、并结合不同覆盖等级或重复等级与数值的对应关系得到检测的重复次数集合以及聚合等级种类。
- 根据权利要求33所述的终端,其中,所述下行控制信道所在搜索空间为两个PRB set,其中第一PRB set基于固定的一种聚合等级进行配置,第二PRB set基于固定的一种重复次数进行配置。
- 根据权利要求33所述的终端,其中,所述检测单元还配置为通过以下参数至少之一,获得所要检测的聚合等级和重复次数:覆盖等级、重复等级、下行控制信道的PRB集合和所述PRB集合内的PRB数量。
- 根据权利要求55所述的终端,其中,所述检测单元还配置为采用以下方式至少之一获得所要检测的聚合等级和重复次数:根据覆盖等级或重复等级确定检测的重复次数;根据覆盖等级或重复等级确定检测的重复次数集合;根据覆盖等级或重复等级确定检测的聚合等级数量和种类;根据配置的PRB集合和集合内的PRB数量确定检测的聚合等级数量和种类;根据检测的重复次数或重复次数集合确定检测的聚合等级数量和种类;根据检测的聚合等级数量和种类确定检测的重复次数或重复次数的集合。
- 根据权利要求33至56任一项所述的终端,其中,所述检测单元还配置为根据实际检测出的下行控制信道的重复次数、以及所述下行控制信道的重复次数与其他信道的重复次数的对应关系,隐含确定信道对应的重复次数,所述其他信道包括以下至少之一:下行业务信道、上行业务信道和上行控制信道。
- 一种基站,所述基站包括:第二确定单元,配置为确定下行控制信道的检测参数集合set(A,B);配置单元,配置为通过高层信令配置下行控制信道的检测参数集合set(A,B);其中,A配置表示聚合等级或物理资源块集合PRB数量,B配置表示重复次数、重复等级或覆盖等级;A配置为各覆盖条件均配置相同数量的聚合等级,且支持部分聚合等级不同,或者A配置为PRB数量隐含得到相应的聚合等级;B配置为绝对值或相对值,所述绝对值为确定的重复次数,所述相对值为覆盖等级、重复等级所对应的基准重复次数乘以调整量,或所述覆盖等级、重复等级所对应的基准重复次数加减步长量。
- 根据权利要求58所述的基站,其中,所述配置单元还配置为根据无线资源控制协议RRC连接是否建立使用不同高层信令配置所述下行控制信道的检测参数集合,根据RRC是否建立配置所述下行控制信道的不同类型的搜索空间,所述高层信令包括SIB、RRC和随机接入响应RAR,所述搜索空间类型包括用户终端专有搜索空间USS和公有搜索空间CSS。
- 根据权利要求58所述的基站,其中,所述配置单元还配置为使用高层信令配置时根据覆盖等级、消息类型和搜索空间类型中的至少一个进行配置所述set(A,B)。
- 根据权利要求58所述的基站,其中,所述配置单元还配置为对A的指示采用以下方式:采用聚合等级、PRB数量指示其中之一或联合指示,其中不同PRB数量与对应使用的聚合等级数量集合之间存在一一对应关系。
- 根据权利要求61所述的基站,其中,在所述基站对A的指示为不同覆盖等级时,所述不同PRB数量与对应使用的聚合等级数量集合存在的一一对应关系不同;其中,同一种PRB数量对应的聚合等级数量在不同覆盖等级时相同或不同;或者,同一种PRB数量对应的聚合等级数量相同,且,聚合等级种类在不同覆盖等级时相同、部分不同或完全不同。
- 根据权利要求58所述的基站,其中,所述配置单元还配置为对B采用以下指示方式:将用重复次数、重复等级、覆盖等级、调整量和步长量指示其中之一或联合指示。
- 根据权利要求58至63任一项所述的基站,其中,所述重复等级或覆盖等级满意以下隐含关系之一:不同重复等级或覆盖等级与基准重复次数存在一一对应关系;不同重复等级或覆盖等级与重复次数集合存在一一对应关系;不同重复等级或覆盖等级与重复次数存在一一对应关系。
- 一种计算机存储介质,所述计算机存储介质中存储有可执行指令,所述可执行指令用于执行权利要求1至25任一项所述的下行控制信道的传输方法。
- 一种计算机存储介质,所述计算机存储介质中存储有可执行指令,所述可执行指令用于执行权利要求26至32任一项所述的下行控制信道的配置方法。
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| CN106301671B (zh) | 2021-01-22 |
| EP3297194A4 (en) | 2019-01-16 |
| EP3297194B1 (en) | 2021-07-21 |
| US10615935B2 (en) | 2020-04-07 |
| CN106301671A (zh) | 2017-01-04 |
| EP3297194A1 (en) | 2018-03-21 |
| US20180139024A1 (en) | 2018-05-17 |
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