WO2015018096A1 - 信息发送方法、检测方法及其装置、通信系统 - Google Patents
信息发送方法、检测方法及其装置、通信系统 Download PDFInfo
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- WO2015018096A1 WO2015018096A1 PCT/CN2013/081245 CN2013081245W WO2015018096A1 WO 2015018096 A1 WO2015018096 A1 WO 2015018096A1 CN 2013081245 W CN2013081245 W CN 2013081245W WO 2015018096 A1 WO2015018096 A1 WO 2015018096A1
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- 238000000034 method Methods 0.000 title claims abstract description 81
- 238000004891 communication Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 68
- 230000002776 aggregation Effects 0.000 claims description 51
- 238000004220 aggregation Methods 0.000 claims description 51
- 230000005540 biological transmission Effects 0.000 claims description 25
- 230000011664 signaling Effects 0.000 claims description 23
- 238000013507 mapping Methods 0.000 claims description 8
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- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 101710173823 Short transient receptor potential channel 4 Proteins 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to the field of communications, and in particular, to a method for transmitting information, a method for detecting the same, a device thereof, and a communication system. Background technique
- M2M communication also known as Machine-type Communication (MTC) refers to data communication between machines without human intervention.
- a device type device may be a wireless user device (User Equipment, UE) for collecting measurement information and reporting this information to a server at a specific time.
- MTC UEs can be used in a variety of applications, such as remote sensing, smart measurements, and speed tracking.
- the physical channel may include a Primary Synchronization Signal (PSS) / a Secondary Synchronization Signal (Secondary Synchronization Signal).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- PBCH Physical Broadcast Channel
- PRACH Physical Random Access Channel
- E Enhanced Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- PUSCH physical uplink shared channel
- PUCCH physical uplink control channel
- the repetition technique can be used as a candidate technology for enhancing coverage performance of most physical channels and physical signals, such as PBCH, PRACH (E) PDCCH, PDSCH/PUSCH, PUCCH.
- E PDCCH
- PDSCH/PUSCH PUCCH.
- DCI Downlink Control Information
- the repetition in the time domain means that one DCI can be repeatedly transmitted on multiple subframes to enhance the transmission quality and improve the downlink coverage.
- the (E)PDCCH carrying DCI signaling is transmitted only in one subframe and is transmitted only once. Regardless of whether it is a traditional or enhanced PDCCH, for a UE, there is a fixed search space to search for the possible transmission location of its DCI.
- the search space includes a user-specific search space and a cell-specific search space.
- the user-specific search space refers to the Control Channel Element (CCE) resource occupied by all possible (E)PDCCH candidates carrying DCI signaling.
- CCE Control Channel Element
- Table 1 shows the number of PDCCH candidates (candidates) under the corresponding Aggregation Level (AL), and the size of the search space.
- the search space is represented as the CCE occupied by all PDCCH candidates.
- the CCEs occupied by the PDCCH with the PDCCH candidate number (m) in the search space with the degree of aggregation L can be calculated by the following formula:
- k V n 2 ⁇
- W is the number of PDCCH candidates to be detected in a given search space
- m is the PDCCH candidate label
- W RNTI 3 ⁇ 4 shows wireless Network temporary identification.
- N ecE k represents the number of CCEs available for the downlink physical control channel of the current subframe k
- L represents the degree of aggregation.
- the UE detects the PDCCH candidates by blind detection, so as to determine whether the subframe has DCI signaling sent to itself.
- each UE only needs to blindly search for (E)PDCCH on the limited CCEs, and the loop is redundant.
- the Cyclic Redundancy Check (CC) check determines whether the subframe has DCI signaling sent to itself.
- FIG. 1 is a schematic diagram of a PDCCH search space. As shown in FIG. 1, the PDCCH search space includes a user-specific search space and a cell-specific search space, indicating where all PDCCHs may appear:
- Table 1 defines the number of PDCCH candidates monitored for each degree of aggregation.
- Figure 2 is a schematic diagram of CCEs occupied by each PDCCH candidate at each degree of aggregation. That is, a schematic diagram of the search space under each degree of aggregation.
- the (E)PDCCH carrying the same DCI signaling will be repeatedly transmitted in multiple subframes.
- the detection is performed according to the current method, on the one hand, the user equipment does not know the (E)PDCCH candidate number (Candidate Number) carrying the DCI copy on each subframe, and on the other hand, the user equipment does not know the different subframes.
- the embodiments of the present invention provide an information sending method, an information detecting method, a device thereof, and a communication system, which can greatly reduce the number of blind detections of user equipment.
- a method for transmitting information includes: when repeatedly transmitting control information on multiple subframes, using a downlink control channel carrying enhanced control information or enhanced in different subframes
- One of the candidate paths into which the downlink control channel (PDCCH or EPDCCH) candidate is combined transmits the PDCCH or EPDCCH.
- an information detection method includes: determining a candidate path of a PDCCH or an EPDCCH carrying control information, where a PDCCH or an EPDCCH carrying control information on different subframes Candidates are combined into the candidate path;
- the detection is performed according to the path corresponding to the candidate path.
- an information transmitting apparatus includes: an information sending unit, configured to repeatedly transmit control information in multiple subframes, where different subframes are utilized And transmitting, by the PDCCH or the EPDCCH, one of the candidate paths into which the PDCCH or the EPDCCH candidate that carries the control information is combined.
- an information detecting apparatus includes: a search space determining unit, where the search space determining unit is configured to determine a candidate path of a PDCCH or an EPDCCH carrying control information, where Combining PDCCH or EPDCCH candidates carrying control information on different subframes into the candidate path;
- a detecting unit configured to perform detection according to a path corresponding to the candidate path.
- a base station comprising the apparatus described in the third party of the embodiment.
- a user equipment comprising the apparatus of the fourth aspect of the embodiment.
- a communication system comprising the base station according to the fifth aspect of the present embodiment and the user equipment according to the sixth aspect.
- an information configuration method includes: A mapping relationship between the degree of aggregation and the number of candidate paths is configured; where PDCCH or EPDCCH candidates carrying control information are combined into the candidate path by different subframes.
- an information configuration apparatus includes: an information configuration unit, where the information configuration unit is configured to configure a mapping relationship between a degree of aggregation and a number of candidate paths; The PDCCH or EPDCCH candidate carrying the control information on different subframes is combined into the candidate path.
- a base station comprising the apparatus of the ninth aspect of the present embodiment.
- a communication system including the base station according to the tenth aspect of the present embodiment.
- a computer readable program is provided, wherein when the program is executed in an information transmitting apparatus or a base station, the program causes a computer to execute in the information transmitting apparatus or a base station.
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the first aspect of the embodiment in an information transmitting apparatus or a base station The method of sending information.
- a fourteenth aspect of the embodiments of the present invention there is provided a computer readable program, wherein when the program is executed in an information detecting device or a user device, the program causes a computer to be at the information detecting device or user device.
- the information detecting method described in the second aspect of the embodiment is performed.
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the second aspect of the embodiment in an information detecting device or a user equipment The information detection method described.
- a computer readable program is provided, wherein when the program is executed in an information configuring apparatus or a base station, the program causes a computer to execute in the information configuring apparatus or a base station.
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the eighth aspect of the embodiment in an information configuration apparatus or a base station Information configuration method.
- the beneficial effects of the embodiments of the present invention are: the control information is transmitted through one of the predetermined candidate paths, and the control information is detected from a predetermined number of candidate paths, thereby reducing the number of blind detections.
- FIG. 1 is a schematic diagram of a PDCCH search space of an existing mechanism
- Figure 2 is the search space under each degree of polymerization
- FIG. 3 is a schematic diagram of an (E)PDCCH candidate path for repeatedly transmitting a DCI
- FIG. 4 is a schematic diagram of an (E)PDCCH candidate path for repeatedly transmitting a DCI
- FIG. 5 is a schematic diagram of a relationship between (E) PDCCH candidates according to Embodiment 1 of the present invention.
- FIG. 6 is a schematic diagram of a relationship between (E) PDCCH candidates according to Embodiment 1 of the present invention.
- FIG. 7 is a flowchart of a method for transmitting information according to Embodiment 2 of the present invention.
- Figure 9 is a block diagram showing the structure of an information transmitting apparatus according to a fourth embodiment of the present invention.
- Figure 10 is a block diagram showing the configuration of an information detecting apparatus according to a fifth embodiment of the present invention.
- Figure 11 is a block diagram showing the structure of a base station according to Embodiment 6 of the present invention.
- Figure 12 is a schematic diagram showing the structure of a user equipment according to Embodiment 7 of the present invention.
- FIG. 13 is a block diagram showing the configuration of a communication system in accordance with an eighth embodiment of the present invention. detailed description
- a DCI is repeatedly transmitted once in one subframe and N subframes are used, and a total of N times of DCIs are transmitted in the time domain;
- the network side such as the total base station 1 ⁇ ⁇ "candidate path (candidate path) to repeatedly transmit a copy of the DCI; user equipment, such as poor MTC UE needs to search ⁇ 1 ⁇ " times it is possible to find the degree of polymerization
- the path of N times is repeated over N subframes for the correct (E) PDCCH of L. It can be seen that the complexity of the blind detection will increase exponentially and the complexity is very large.
- the N subframes are given a certain degree of aggregation L, and the number of PDCCH candidates defined in Table 1 is concatenated, and relabeled as j ⁇ l Wx M ⁇ ), indicating the number of available PDCCH candidates.
- the following is described in conjunction with the situation in Table 1.
- FIG. 3 is a schematic diagram of an (E)PDCCH candidate path in which DCI is repeatedly transmitted.
- different combinations of the 2N PDCCH candidates may constitute a set of candidate paths. Since the path is indicated by a PDCCH candidate label, the candidate path may be referred to as a candidate number path.
- a PDCCH path carrying a DCI copy is illustrated in FIG.
- the MTC UE needs at most a poor search.
- Path the search space of each (E) PDCCH candidate in each subframe, that is, the occupied CCEs can be determined according to existing standards, and the complexity of blind detection is large.
- N subframes are available;
- FIG. 4 is a schematic diagram of an (E)PDCCH candidate path in which DCI is repeatedly transmitted.
- the (E)PDCCH candidate of the DCI replica belongs to the permutation and combination problem.
- the MTC UE needs to exhaustively search ⁇ times to find a path in which the correct (E) PDCCH with a degree of aggregation L is repeatedly transmitted on one subframe.
- the search space of each (E)PDCCH candidate (candidate) that is, the CCEs occupied, can be determined according to existing standards.
- the complexity of this blind detection is also very large.
- An embodiment of the present invention provides an information sending method, an information detecting method, an apparatus, and a communications system.
- an (E) PDCCH When an (E) PDCCH is repeatedly transmitted in multiple subframes, the PDCCH may be sent and detected through a subset of the candidate path set. ) PDCCH, which reduces the complexity of blind detection.
- a set of (E) PDCCH candidate paths of bearer control information (such as DCI signaling) may be determined first.
- each candidate path may be a combination of (E) PDCCH candidate labels, that is, The relationship between candidate labels.
- the base station may select one of the candidate paths, and select corresponding ones on different TTIs according to the relationship between each (E)PDCCH candidate label of the candidate path.
- the relationship between the E) PDCCH candidate number (Candidate Number) of the bearer control information (such as DCI signaling) may be a determined relationship.
- the network side may transmit the (E) PDCCH carrying the control information according to the determined relationship.
- the control signaling may be DCI.
- the user-specific search space is the above-mentioned candidate path, that is, the combination of (E) PDCCH candidates carrying control information in different subframes.
- candidate path which can be a subset of the set of all candidate paths.
- the number of candidate paths that each UE needs to monitor can also be predetermined.
- the relationship between the (E)PDCCH candidate labels may be a determined relationship, such as notifying the UE by the network side or the established relationship between the two parties or calculating the relationship according to a predetermined relationship (such as the formula flmction).
- the (E)PDCCH candidate labels of different TTIs in the path, and then the CCEs resources occupied by each (E)PDCCH candidate label are calculated according to existing standards. In this way, the user equipment can detect according to the search space dedicated by the user, which can reduce the number of blind detections.
- Embodiment 1 of the present invention provides a method for transmitting information.
- the method includes:
- the PDCCH is transmitted by using one of the candidate paths of the downlink control channel carrying the control information or the candidate of the enhanced downlink control channel (PDCCH or EPDCCH) in different subframes.
- PDCCH enhanced downlink control channel
- the base station may select a candidate path, and select corresponding (E)PDCCH candidates on different subframes (TTIs) to transmit bearer control according to the relationship between each (E)PDCCH candidate label of the candidate path.
- TTIs subframes
- the number of the candidate paths may be less than or equal to the number of all the paths of the candidate combination of the PDCCH or the EPDCCH.
- the candidate paths of the PDCCH or EPDCCH candidate carrying the control information in different subframes are similar to those shown in FIG. 3 and FIG. 4, and in order to further reduce the blind detection complexity of the user equipment, the number of the candidate paths may be smaller than the combined The number of all paths, that is, the candidate path constitutes a subset of the set for all candidate paths.
- each candidate path is a combination of (E) PDCCH candidate labels (each candidate label corresponds to a subframe) , that is, the relationship between candidate labels.
- determining the candidate path is to determine the relationship between the candidate labels.
- the network side for example, the base station selects one candidate path in the candidate path set, and selects different subframes according to the relationship between each (E)PDCCH candidate label of the candidate path (ie, The corresponding (E)PDCCH candidate on the TTI) transmits the bearer control information.
- the relationship between the (E)PDCCH candidate numbers (Can) of the bearer control information (such as DCI signaling), that is, the candidate path may be a determined relationship.
- the network side may transmit the (E) PDCCH carrying the control information according to the determined relationship.
- the control signaling may be DCI. For example, send it according to the path shown by the arrow in Figure 3.
- the candidate path that is, the relationship between the candidate labels
- the candidate path may be configured by high-level signaling (such as RRC signaling) and notified to the user equipment; or, according to a predetermined relationship (such as a predetermined formula), the relationship is calculated.
- the formula may be known to the base station and the user equipment; or, it may be determined in accordance with a relationship known to the base station and the user equipment.
- the relationship between the (E) PDCCH candidate labels of the bearer control information may constitute a set of candidate paths, and the (E) PDCCH is transmitted through the relationship, that is, the candidate path.
- the network side may indicate a relationship between the (E) PDCCH candidate labels by using a bitmap, that is, indicate a path for transmitting the (E) PDCCH; or may calculate the path by using a predetermined relationship; or The path used is agreed on the base station side and the user equipment side.
- the candidate path may be represented as that the control information transmitted on different subframes is a logical (E) PDCCH candidate having the same or different label. Hosted.
- the relationship between the (E) PDCCH candidates is: On subframes 1 to N, that is, the first to N transmission time intervals (TTI, Transmission Time Interval), the control information sent is The logical PDCCH candidate bearers of the same label (such as #1, #2), that is, the labels of the (E) PDCCH candidates of the first candidate path are all #1, and the labels of the (E) PDCCH candidates of the second candidate path are all #2.
- TTI Transmission Time Interval
- the PDCCH candidate number carrying the actual DCI transmission in the first subframe (1st subframe) is #1, and the PDCCH candidate number of the subsequent N-1 subframes transmitting the DCI is also #1; in the first subframe (1st)
- the logical PDCCH candidate number (candidate number) carrying the actual DCI transmission is #2, followed by N-1 children.
- the logical PDCCH candidate number of the frame transmission DCI is also #2.
- the logical PDCCH candidate numbers carrying the actual DCI transmissions on the N subframes are the same. Therefore, in this case, it is assumed that at a certain degree of aggregation, the number of (re)ition candidate paths of the (E) PDCCH candidate path is the same as the number of PDCCH candidates defined under the starting subframe.
- the transmitted control information may also be carried by logical (E) PDCCH candidates having different labels.
- N is greater than 1; and the number of candidate paths is determined for the 2, i.e., candidate path is a subset of all paths.
- the relationship between the PDCCH candidate labels of the bearer control information is determined in advance, that is, the candidate path, when the UE blindly detects N DCIs, a certain degree of aggregation AL is detected by multiple blind detection. times, and in accordance with the existing mechanism, to be detected C ⁇ ) 7V times, y3 ⁇ 4) is less than C W w, can be seen by the embodiment of the present invention can greatly reduce the number of blind detections.
- Fig. 7 is a flow chart showing the method of transmitting information in the second embodiment of the present invention. Based on Embodiment 1, the difference from Embodiment 1 is that the number of candidate paths can be predetermined, as the number of candidate paths that are most likely to be monitored under each degree of aggregation can be determined by a known relationship table.
- the method includes:
- Step 701 Determine a number of candidate paths to be monitored
- the candidate path is synthesized by a candidate group of a PDCCH or an EPDCCH carrying control information
- the number of candidate paths may be determined in advance, for example, the number may be configured by the network side, such as a base station, or determined according to a predetermined relationship; the number may be less than the number of all possible paths;
- the number of candidate paths at each degree of aggregation may be predetermined, as shown in Table 2 and Table 3, and the number is determined by looking up the table, which is described below.
- Step 702 Select one candidate path to transmit bearer control information PDCCH or EPDCCH in the predetermined number of candidate paths.
- the sending process is similar to that in Embodiment 1, and details are not described herein again.
- step 701 Table 2 is defined, and (E)PDCCH candidate path that the UE needs to monitor under a predetermined coverage target (or repeated N TTIs) is given. quantity.
- the table 2 can be used to determine that the number of repetitions is M1 under different degrees of aggregation, and the network side (such as a base station) selects one of the candidate paths defined in Table 2 to repeatedly send when repeatedly transmitting (E) PDCCH ( E) PDCCH 0
- Table 2 also determines the number of (E)PDCCH candidate paths that the UE needs to monitor.
- the number of candidate paths is A (1) ; when the degree of aggregation is 2, the number of candidate paths is A (2) ; when the degree of aggregation is 4, the candidate paths are The number is A (4) ; when the degree of aggregation is 8, the number of candidate paths is A (8) .
- Table 2 Number of candidate paths that the UE needs to monitor when repeatedly transmitting (E)PDCCH in the time domain
- the relationship between each (E)PDCCH candidate number (E) PDCCH candidate number of each candidate path may be determined, or may be calculated by a predetermined relationship (fimction).
- a table 3 is defined for determining that the number of repetitions on the N cells at different degrees of aggregation is M2, and the network side (such as a base station)
- the network side such as a base station
- Table 3 determines the number of (E)PDCCH candidate paths that the UE needs to monitor.
- each candidate path is each (E)
- the relationship between the PDCCH candidate numbers ((E) PDCCH candidate numbers) may be determined, or may be calculated by a predetermined relationship (flmction).
- the number of repetitions M1 and M2 may be any integer, such as 10 times, 20 times, etc.
- Fig. 8 is a flow chart showing the method of detecting information in the second embodiment of the present invention. As shown in FIG. 8 , the method includes: Step 801: Determine a candidate path of a PDCCH or an EPDCCH that carries control information, where a PDCCH or an EPDCCH candidate that carries control information in different subframes is combined into the candidate path;
- the candidate path may also be referred to as a user-specific search space, and the user equipment may detect each candidate path in the user-specific search space;
- determining the candidate path that is, determining the relationship between the (E) PDCCH candidate labels
- the user equipment may receive the (E) PDCCH candidate of the bearer control information for each path candidate configured by the network side.
- Step 802 Perform detection according to the candidate path, that is, perform detection according to the determined search space dedicated to the user;
- the CCEs occupied by the number of (E) PDCCH candidates on different subframes corresponding to each candidate path may be calculated by using an existing standard, as in the formula (1) in the background art. (2), will not repeat them here.
- the (E)PDCCH candidate path carrying the control information is a subset of all possible candidates. For example, transmitting on N subframes and transmitting (E) PDCCH once on each subframe
- the number of all candidate paths is, when N subframes are transmitted and K times (E) PDCCH is transmitted on each subframe, the number of all concatenations is C (3 ⁇ 4r) , so that the number of path candidates in the search space is A subset of the set, where N and K are positive integers.
- the size of the subset can be known by defining a new table 2 or table 3. That is, the number of candidate paths formed by the (E) PDCCH candidates under different repetition times of different aggregation degrees AL can be determined by defining a new table 2 or table 3.
- the method may further include: determining, according to the predetermined relationship table, the candidate path of the (E) PDCCH candidate combination under different repetition times under different aggregation degrees AL according to Table 2 or Table 3. Number.
- the user equipment performs detection on a determined number of candidate paths.
- one candidate path is selected, and corresponding (E)PDCCH candidates on different TTIs are selected according to the relationship between each (E)PDCCH candidate label on the candidate path.
- the relationship between the (E)PDCCH candidates (Candidate Number) carrying control information (such as DCI signaling) may be a determined relationship.
- the network side can transmit the (E) PDCCH carrying the control information according to the relationship.
- the control signaling may be a DCI.
- the user-specific search space refers to a candidate path that carries the combined (E) PDCCH candidate on different subframes, and the candidate path may be all A subset of the path collection.
- the relationship between the (E)PDCCH candidate labels of each path may be a determined relationship, such as notifying the UE through the network side or the established relationship between the two parties or calculating the different parameters in the path according to the flmction expression (E)
- the PDCCH candidate label, and then the CCEs resources occupied by each (E)PDCCH candidate label are calculated according to existing standards. In this way, the user equipment can detect according to the search space dedicated by the user, which can reduce the number of blind detections.
- the relationship between the PDCCH candidates carrying the control information, that is, the path candidate, is determined in advance, and the UE detects the N DCIs blindly, and the aggregation degree AL is down to multiple blind detection times.
- A, ⁇ C N and according to the current mechanism, it is necessary to detect 3 ⁇ 4 times, and it can be seen that the number of blind detections can be greatly reduced by the embodiment of the present invention.
- the following describes the detection process by taking the formula of the (E)PDCCH candidate label used by different TTIs on each candidate path by using a formula.
- Figure 9 is a block diagram showing the structure of an information transmitting apparatus according to a fourth embodiment of the present invention.
- the apparatus 900 includes: an information sending unit 901, configured to repeatedly transmit control information in multiple subframes, where candidates that are combined with PDCCH or EPDCCH candidates that carry control information in different subframes are used. One of the paths transmits the PDCCH or EPDCCH.
- the number of candidate paths is less than or equal to the number of all paths in which the PDCCH or EPDCCH candidates are combined. And transmitting the (E) PDCCH is similar to the embodiments 1 and 2, and details are not described herein again.
- the candidate path may be represented by a relationship between (E) PDCCH candidate labels of bearer control information.
- the (E) PDCCH is transmitted through the determined candidate path, so that the user equipment can greatly reduce the number of blind detections when blindly detecting the DCI.
- the apparatus 900 may further include a first path determining unit 902, where the first path determining unit 902 is configured to configure the candidate path by using high layer signaling; or calculate the candidate path according to a predetermined relationship; or, according to pre-existence The path information determines the candidate path.
- the apparatus 900 may further include an information notification unit (not shown) for notifying the configured candidate path to the user equipment.
- a storage unit (not shown) may be further included, and the storage unit may be used to store the candidate path.
- the apparatus 400 further includes a first path quantity determining unit (not shown), where the first path quantity determining unit is configured to pre-configure the number of the candidate paths; or, according to the pre-stored path quantity information, The number of candidate paths.
- the device 900 is a network side device and may be a base station.
- FIG. 10 is a block diagram showing the configuration of an information detecting apparatus according to a fifth embodiment of the present invention.
- the apparatus 1000 includes: a search space determining unit 1001 and a detecting unit 1002.
- the search space determining unit 1001 is configured to determine a candidate path of a PDCCH or an EPDCCH carrying control information, where the bearer is carried by different subframes.
- the PDCCH or EPDCCH candidate of the control information is combined into the candidate path; the detecting unit 1002 is configured to perform detection according to the path corresponding to the candidate path.
- the apparatus 1000 may further include a receiving unit (not shown) for receiving the candidate path configured by the network side; or, the apparatus 1000 may further include a calculating unit (not shown), the calculating The unit is configured to calculate the candidate path described above according to a predetermined relationship.
- the apparatus 1000 may further include a storage unit (not shown) for storing the obtained candidate path or storing a relationship for calculating the candidate path.
- a storage unit (not shown) for storing the obtained candidate path or storing a relationship for calculating the candidate path.
- the detection process of the device 1000 is as described in Embodiment 2, and details are not described herein again.
- the apparatus 1000 further includes a second path quantity determining unit (not shown), where the second path quantity determining unit is configured to receive the number of the candidate paths pre-configured by the network side; or, according to the number of pre-stored paths Information to determine the number of candidate paths.
- device 1000 can be a user equipment.
- the embodiment of the present invention provides a base station, and the base station includes the information transmitting apparatus according to the third embodiment, and the specific structure is as described in Embodiment 4, and details are not described herein again.
- FIG. 11 is a block diagram showing the structure of a base station according to a sixth embodiment of the present invention.
- the base station 1100 includes: an information sending unit 1103, which is configured and functions as shown in Embodiment 4.
- a main control circuit 1101, a memory 1102, a transceiver 1104, and an antenna 1105 are included; wherein the memory 1102 can store a program for transmitting information, and execute the program under the control of the main controller 1101, and the program is executed. As described in Embodiment 1, it will not be described here. The functions of other components are similar to those of the prior art and will not be described here. Further, the information transmitting unit 1103 can be used in combination with the main control circuit 1101, and the memory 1102 can store the relationship between the candidates carrying the (E) PDCCH.
- the embodiment of the present invention provides a user equipment, and the user equipment includes the information detecting apparatus described in Embodiment 5, and the specific configuration is as described in Embodiment 5, and details are not described herein again.
- FIG. 12 is a block diagram showing the structure of a user equipment according to Embodiment 7 of the present invention.
- the user equipment 1200 includes an information detecting unit 1203, and its configuration and functions are as described in Embodiment 5, and details are not described herein again.
- the user device is a mobile phone, and the figure is merely exemplary; the mobile phone 1200 may also have other types of circuit components to supplement or replace the operational circuitry to implement communication functions or other functions. It is obvious that the mobile phone 1200 does not have to include all of the components shown in FIG.
- the mobile phone 1200 includes a main control circuit 1201, a transceiver 1206, and an input unit.
- Main control circuit 1201 may include a microprocessor or other processor device and/or logic device that receives input and controls the operation of various components of mobile telephone 1200.
- the memory 1202 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device.
- the above information detection procedure can be performed on the storage.
- the main controller circuit 1201 can execute the program stored by the memory 1202 to implement information detection.
- the functions of other components are similar to those of the existing ones and will not be described here.
- mobile telephone 1200 may be implemented in dedicated hardware, firmware, software or a combination thereof without departing from the scope of the invention.
- FIG. 13 is a block diagram showing the configuration of a communication system in accordance with an eighth embodiment of the present invention.
- the communication system includes a base station and a user equipment, where the base station is the base station according to Embodiment 6, and the user equipment is the user equipment described in Embodiment 7, wherein the method for transmitting information by the base station is implemented.
- the process of detecting the information by the user equipment is as described in Embodiment 3, and details are not described herein again.
- the (E)PDCCH is transmitted through the determined candidate path, and the number of blind detections by the user equipment can be reduced.
- the secondary path, and the search space of each (E) PDCCH candidate on each subframe, that is, the occupied CCEs can be determined according to existing standards.
- the base station side If the above method of the embodiment of the present invention is adopted, the base station side:
- the relationship between the (E) PDCCH candidate labels of the bearer control information is configured by the high layer signaling (configuration candidate path), as configured according to FIG. 5, and the configured candidate path is notified to the user equipment, and the candidate path is configured according to the configuration.
- the (E)PDCCH is transmitted.
- each (E) PDCCH candidate on each subframe that is, the occupied CCEs can be determined according to existing standards.
- the base station side If the above method of the embodiment of the present invention is adopted, the base station side:
- the relationship between the (E) PDCCH candidate labels of the bearer control information is configured by the high layer signaling, that is, the candidate path is configured according to FIG. 5, and the configured candidate path is notified to the user equipment, and a candidate path is selected and sent (E) ) PDCCH.
- the network side may indicate the above path by a bit map, and may also calculate the path by a predetermined relationship or indicate the path by a number of bits.
- the relationship between the PDCCH candidates carrying the control information is determined in advance, that is, the path candidate, when the UE blindly detects N DCIs, a certain degree of aggregation AL is detected by multiple blind detection/ ( ) times, N , M (3 ⁇ 4r) According to the current mechanism, it is necessary to detect M (3 ⁇ 4r times, it can be seen that the number of blind detections can be greatly reduced by the embodiment of the invention.
- one candidate path is selected, and corresponding (E)PDCCH candidates on different TTIs are selected according to the relationship between each (E)PDCCH candidate label on the candidate path.
- the transmission of information may be a determined relationship.
- the network side can transmit the (E) PDCCH carrying the control information according to the relationship.
- the control signaling may be DCI.
- a new user-specific search space refers to a path candidate that is combined by carrying the (E) PDCCH candidate on different subframes, and the path candidate may be all A subset of the path collection.
- the relationship between the (E)PDCCH candidate labels of each path may be a determined relationship, such as notifying the UE through the network side or the established relationship between the two parties or calculating the different parameters in the path according to the flmction expression (E) The PDCCH candidate label, and then the CCEs resources occupied by each (E)PDCCH candidate label are calculated according to existing standards. In this way, the user equipment can perform detection according to the search space dedicated by the user, which can reduce the number of blind detections.
- the ninth embodiment of the present invention further provides an information configuration method, where the method includes: configuring a mapping relationship between the degree of aggregation and the number of candidate paths; wherein the PDCCH or EPDCCH candidate carrying the control information in different subframes is combined into the candidate path.
- mapping relationship may be indicated by a table, such as the relationship shown in Table 2 or Table 3.
- the number of the configured candidate paths is less than or equal to the number of all paths synthesized by the PDCCH or EPDCCH candidate group.
- Embodiment 10 of the present invention further provides an information configuration apparatus.
- the device includes: an information configuration unit, configured to configure a mapping relationship between the degree of aggregation and the number of candidate paths; wherein the candidate path is combined by a PDCCH or an EPDCCH candidate carrying control information on different subframes.
- the mapping relationship of the specific configuration is shown in Table 2 or Table 3, and is not mentioned here.
- Embodiment 11 of the present invention further provides a base station, which may include the apparatus described in Embodiment 10.
- Embodiment 12 of the present invention further provides a communication system, which may include the base station described in Embodiment 11.
- the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in an information transmitting apparatus or a base station, the program causes a computer to execute the embodiments 1 and 2 in the information transmitting apparatus or the base station The method of sending information.
- the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the information transmitting method described in Embodiments 1 and 2 in an information transmitting device or a base station.
- the embodiment of the present invention further provides a computer readable program, wherein the program causes a computer to execute an embodiment in the information detecting device or user equipment when the program is executed in an information transmitting device or a user device
- the information detection method described in 3. further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the information detecting method described in Embodiment 3 in the information detecting device or the user equipment.
- Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in an information configuration device or a base station, the program causes a computer to execute the information described in Embodiment 9 in the information configuration device or base station Configuration method.
- the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the information configuration method described in Embodiment 9 in an information configuration device or a base station.
- the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
- the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
- Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
- the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
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Abstract
一种信息发送方法,信息检测方法及其装置、通信系统。该信息发送方法包括:在多个子帧上重复发送控制信息时,利用不同子帧上、承载控制信息的下行控制信道或增强的下行控制信道(PDCCH或EPDCCH)候选组合成的候选路径中的一条路径发送所述PDCCH或EPDCCH。在本实施例中,该候选路径可为所有路径集合的子集,这样在用户设备进行盲检测时,可降低盲检测的复杂度。
Description
信息发送方法、 检测方法及其装置、 通信系统 技术领域
本发明涉及通信领域, 特别涉及一种信息发送方法、检测方法及其装置、通信系 统。 背景技术
机器与机器(Machine to Machine, M2M)通信也称为机器类型通信(Machine-type Communication, MTC) , 是指无需人工参与的机器之间的数据通信。 例如, 机器类 型的装置(本申请文件中统一称 MTC UE)可以是用于收集测量信息并且在某特定时 间将此信息上报给服务器的无线用户装置(User Equipment, UE) 。 MTC UE可以用 于各种应用场景, 如遥感监控, 智能测量, 以及车速跟踪等。
目前, 3GPP已完成了关于低成本 MTC ( low-cost MTC) 的研究, 主要包括低 成本技术以及覆盖增强技术的研究。 最终 TR36.888总结了这些结果的分析。 之所以 研究覆盖性能的增强, 是由于目前研究的 MTC UE (如仪器仪表之类的设备), 大多 假设处在居民楼里的地下室, 存在非常大的穿透损耗。
在 TR36.888中, 给出了各物理信道以及物理信号的覆盖性能增强的所有可能的 技术, 其中, 该物理信道可包括主同步信号(Primary Synchronization Signal, PSS ) / 辅同步信号 (Secondary Synchronization Signal, SSS ) , 物理广播信道 (Physical Broadcast Channel , PBCH) 、 随机接入信道 (Physical Random Access Channel, PRACH) 、 (增强的) 物理下行控制信道 (Enhanced Physical Downlink Control Channel, (E) PDCCH) 、 物理下行共享信道(Physical Downlink Shared Channel , PDSCH) /物理上行共享信道 (Physical Uplink Shared Channel , PUSCH) 、 物理上 行控制信道 (Physical Uplink Control Channel, PUCCH) 等。
在研究阶段 (Study Item, SI) 的讨论过程中, 重复 (Repetition) 技术是一种直 观且热门的用于增强覆盖性能的方法。并且该重复技术可以作为大部分物理信道及物 理信号的增强覆盖性能的候选技术,如 PBCH、 PRACH (E)PDCCH、 PDSCH/PUSCH、 PUCCH。 现有 (E)PDCCH传输的方法, 一个下行控制信息 ( Downlink Control
Information, DCI) 只在一个子帧 (Subframe) 上传输。 对于 MTCUE来说, 时间域 上的重复意味着一个 DCI可在多个子帧上重复传输, 以增强传输质量提高下行覆盖。
现有标准中, 承载 DCI信令的 (E)PDCCH只在一个子帧上发送, 且只发送一次。 不管是传统的还是增强的 PDCCH, 对于某个 UE来讲, 均有固定的搜索空间来搜索 其 DCI可能的发送位置。 搜索空间包括用户专用的搜索空间和小区专用的搜索空间。 用户专用的搜索空间是指承载 DCI信令的所有可能的 (E)PDCCH候选(candidate)所 占的控制信道元素 (Control Channel Element, CCE) 资源。
例如,表 1给出了相应聚合度(Aggregation Level, AL)下 PDCCH候选(candidate) 数量, 以及搜索空间的大小。
表 1 UE监测的 PDCCH候选 (candidate)
聚合度为 L的搜索空间中 PDCCH候选标号(candidate number)为 m的 PDCCH 所占用的 CCEs可由下述公式计算得出:
A-Y^jmodD
其中, i =WRNTI≠0, = 39827, = 65537, k = Vn 2\, 是无线帧中 的时隙标号。 0,…, - 1, m' = m + M ".nci, m = 0,···, (Ζ) -1 o W是给定搜 索空间中要检测的 PDCCH candidate数, m表示 PDCCH候选标号, "c 表示载波指 示, 如果 UE配置了载波指示, 贝 ljw' = w + M( )'"C/, 否则 = 。 WRNTI ¾示无线
网络临时标识。 NecE,k表示当前子帧 k下行物理控制信道可用的 CCE个数, L表示 聚合度。
UE通过盲检测这些定义的 PDCCH候选, 从而确定该子帧是否有发送给自己的 DCI信令; 通过定义搜索空间, 每个 UE只需要在限定的 CCEs上盲搜索 (E)PDCCH, 通过循环冗余校验码 (Cyclic Redundancy Check, C C) 校验确定该子帧是否有发 送给自己的 DCI信令。
图 1是 PDCCH搜索空间的示意图。 如图 1所示, PDCCH搜索空间包含了用户 专用的搜索空间和小区专用的搜索空间, 表示所有 PDCCH可能出现的位置:
表 1定义了每个聚合度下监测的 PDCCH candidate数量, 通过公式(1 ) 〜 (2), 每个 UE可以计算出每个聚合度下每个 PDCCH候选所占的 CCEs。 如 AL=2的情况 下, UE通过公式计算出 PDCCH candidate 1所占的 CCEs为 CCE0~CCE1, PDCCH candidat 所占的 CCEs为 CCE2~CCE3, 依此类推计算, 从而计算出所有聚合度下所 有 PDCCH candidate所占的 CCEs, 针对每种情况进行盲检测。
图 2是各个聚合度下每个 PDCCH candidate所占的 CCEs的示意图。 即各个聚合 度下搜索空间示意图。
应该注意, 上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、 完整的说明, 并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发 明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。 发明内容
但是, 对处于覆盖性能较差的用户设备, 如 MTC UE等类似的 UE, 为了改善下 行控制信道的覆盖性能,承载相同 DCI信令的 (E)PDCCH会在多个子帧上进行重复发 送。此时, 如果按照目前的方法进行检测, 一方面由于用户设备不知道每个子帧上承 载该 DCI副本的 (E)PDCCH候选标号 (Candidate Number), 另一方面, 用户设备也 不知道不同子帧(subframe)之间承载该 DCI副本的 (E)PDCCH候选标号(candidate number) 之间具有什么关系, 当用户设备, 如 MTC UE确定 (E)PDCCH repetition的 起始子帧以及重复(repetition)发送所跨越的子帧之后, 如 TTI#n~TTI#n+N, 该用户 设备需要尝试这 N个子帧之间所有 (E)PDCCH候选标号( candidate number)的组合,
从而找到正确的沿着不同子帧重复发送 DCI的(E) PDCCH候选标号路径(candidate number path), 从而使得盲检测复杂度会大大增加。
本发明实施例提供一种信息发送方法、信息检测方法及其装置、通信系统, 可大 大减少用户设备盲检测的次数。
根据本发明实施例的第一方面, 提供了一种信息发送方法, 所述方法包括: 在多个子帧上重复发送控制信息时,利用不同子帧上、承载控制信息的下行控制 信道或增强的下行控制信道(PDCCH或 EPDCCH)候选组合成的候选路径中的一条 路径发送所述 PDCCH或 EPDCCH。
根据本发明实施例的第二方面, 提供了一种信息检测方法, 所述方法包括: 确定承载控制信息的 PDCCH或 EPDCCH的候选路径, 其中, 由不同子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成所述候选路径;
根据所述候选路径对应的路径进行检测。
根据本发明实施例的第三方面, 提供了一种信息发送装置, 所述装置包括: 信息发送单元,所述信息发送单元用于在多个子帧上重复发送控制信息,其中利 用不同子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成的候选路径中的一 条路径发送所述 PDCCH或 EPDCCH。
根据本发明实施例的第四方面, 提供了一种信息检测装置, 所述装置包括: 搜索空间确定单元,所述搜索空间确定单元用于确定承载控制信息的 PDCCH或 EPDCCH的候选路径, 其中, 由不同子帧上、 承载控制信息的 PDCCH或 EPDCCH 候选组合成所述候选路径;
检测单元, 所述检测单元用于根据所述候选路径对应的路径进行检测。
根据本发明实施例的第五方面,提供了一种基站,所述基站包括本实施例第三方 面所述的装置。
根据本发明实施例的第六方面,提供了一种用户设备,所述用户设备包括本实施 例第四方面所述的装置。
根据本发明实施例的第七方面,提供了一种通信系统,所述通信系统包括本实施 例第五方面所述的基站和第六方面所述的用户设备。
根据本发明实施例的第八方面, 提供了一种信息配置方法, 所述方法包括:
配置聚合度与候选路径的数量之间的映射关系; 其中由不同子帧上、承载控制信 息的 PDCCH或 EPDCCH候选组合成所述候选路径。
根据本发明实施例的第九方面, 提供了一种信息配置装置, 所述装置包括: 信息配置单元,所述信息配置单元用于配置聚合度与候选路径的数量之间的映射 关系; 其中由不同子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成所述候 选路径。
根据本发明实施例的第十方面,提供了一种基站,包括本实施例第九方面所述的 装置。
根据本发明实施例的第十一方面,提供了一种通信系统,包括本实施例第十方面 所述的基站。
根据本发明实施例的第十二方面,提供了一种计算机可读程序,其中当在信息发 送装置或基站中执行所述程序时,所述程序使得计算机在所述信息发送装置或基站中 执行本实施例第一方面所述的信息发送方法。
根据本发明实施例的第十三方面, 提供了一种存储有计算机可读程序的存储介 质,其中所述计算机可读程序使得计算机在信息发送装置或基站中执行本实施例第一 方面所述的信息发送方法。
根据本发明实施例的第十四方面,提供了一种计算机可读程序,其中当在信息检 测装置或用户设备中执行所述程序时,所述程序使得计算机在所述信息检测装置或用 户设备中执行本实施例第二方面所述的信息检测方法。
根据本发明实施例的第十五方面, 提供了一种存储有计算机可读程序的存储介 质,其中所述计算机可读程序使得计算机在信息检测装置或用户设备中执行本实施例 第二方面所述的信息检测方法。
根据本发明实施例的第十六方面,提供了一种计算机可读程序,其中当在信息配 置装置或基站中执行所述程序时,所述程序使得计算机在所述信息配置装置或基站中 执行本实施例第八方面所述的信息配置方法。
根据本发明实施例的第十七方面, 提供了一种存储有计算机可读程序的存储介 质,其中所述计算机可读程序使得计算机在信息配置装置或基站中执行本实施例第八 方面所述的信息配置方法。
本发明实施例的有益效果在于: 通过预先确定的候选路径之一发送控制信息, 且 从预定数量的候选路径中检测该控制信息, 可减少盲检测的次数。
参照后文的说明和附图,详细公开了本发明的特定实施方式,指明了本发明的原 理可以被采用的方式。应该理解, 本发明的实施方式在范围上并不因而受到限制。在 所附权利要求的精神和条款的范围内,本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用, 与其它实施方式中的特征相组合, 或替代其它实施方式中的 特征。
应该强调, 术语"包括 /包含"在本文使用时指特征、 整件、 步骤或组件的存在, 但并不排除一个或更多个其它特征、 整件、 步骤或组件的存在或附加。 附图说明
所包括的附图用来提供对本发明实施例的进一步的理解,其构成了说明书的一部 分, 用于例示本发明的实施方式, 并与文字描述一起来阐释本发明的原理。 显而易见 地, 下面描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。 在附图中: 图 1 是现有机制的 PDCCH搜索空间示意图;
图 2是各个聚合度下的搜索空间;
图 3是重复发送 DCI的 (E)PDCCH候选路径的示意图;
图 4是重复发送 DCI的 (E)PDCCH候选路径的示意图;
图 5是本发明实施例 1的 (E) PDCCH候选之间的关系示意图;
图 6是本发明实施例 1的 (E) PDCCH候选之间的关系示意图;
图 7是本发明实施例 2的信息发送方法流程图;
图 8是本发明实施例 3的信息检测方法流程图;
图 9是本发明实施例 4的信息发送装置构成示意图;
图 10是本发明实施例 5的信息检测装置构成示意图。
图 11是本发明实施例 6的基站构成示意图;
图 12是本发明实施例 7的用户设备构成示意图;
图 13是本发明实施例 8的通信系统构成示意图。
具体实施方式
以下结合附图对本发明的各种实施方式进行说明。 这些实施方式只是示例性的, 不是对本发明的限制。
首先以下面两种在时间域上重复发送 (E)PDCCH ((E)PDCCH repetition over multiple subframes) 的情况为例, 来说明现有的检测方法存在的检测复杂度高的问 题。
第一种, 一个 DCI在一个子帧上重复传输一次且使用了 N个子帧, 在时域上共 传输 N次 DCI;
对于这种在时域上 (E)PDCCH的重复传输的情况, 由于终端设备并不知道每个 子帧上传输该 DCI副本的 (E)PDCCH候选标号 (candidate number) 是多少, 假定聚 合度 L, N个子帧上 N次重复(repetition) 的 (E)PDCCH候选数的组合共有(M(" )W 种可能。
因此, 在这种情况下, 网络侧如基站共有^ 1^" 种候选路径 (candidate path) 来重复发送该 DCI副本; 用户设备, 如 MTC UE需要穷搜索^ 1^" 次才可能找到 聚合度为 L的正确的 (E)PDCCH在 N个子帧上重复传输 N次的路径。 由此可知, 该 盲检测的复杂度将呈指数分布增长, 复杂度很大。
例如, 将 N个子帧上给定某个聚合度 L下、 根据表 1所定义的 PDCCH候选个 数进行级联, 重新标号为 j^l Wx M^) , 表示可用的 PDCCH候选个数。 以下结合表 1中的情况来说明。
图 3是重复发送 DCI的 (E)PDCCH候选路径的示意图。 如图 3所示, AL=4时, 由表 1可知, PDCCH候选数为 2,沿着 N个子帧(TTI#i~TTI#i+N-l ),可用的 PDCCH 候选个数为 2N, 其中, 将沿着 N个子帧的 2N个可用的 PDCCH候选级联并且顺序 标号, 标号依次为 j=#l~#2N (指逻辑标号)。 这样, 该 2N个 PDCCH候选的不同组 合可构成候选路径的集合, 由于上述路径使用 PDCCH候选标号来指示, 因此, 该候 选路径可称为候选标号路径( candidate number path)。 图 3中示意出一条承载 DCI副 本的 PDCCH路径。
在这种情况下, 网络侧, 如基站 (eNB)共有( (4)^ = 2^种?0〔〔11候选标号 路径 (candidate number path) 来重复发送该 DCI副本。 MTC UE至多需要穷搜索 (M(4) = 2W次才可能找到 AL=4的正确的 PDCCH在 N个子帧上重复传输 N次的路
径, 每个子帧上每个 (E)PDCCH candidate的搜索空间即所占的 CCEs可以根据现有标 准确定, 盲检测的复杂度很大。
第二种, 在一个子帧上重复传输多次 DCI, 可用 N个子帧;
在这种情况下, 假定聚合度 L, 在 N个子帧上共完成 K次 (E)PDCCH的重复传 输。 由于终端设备并不知道每个子帧上传输了几次该 DCI副本, 且每个子帧上传输 该 DCI副本的 (E)PDCCH候选标号是多少。 在 N个子帧上, 给定聚合度 L, 所有
(E)PDCCH候选个数为 Wx M^) 。
图 4是重复发送 DCI的 (E)PDCCH候选路径的示意图。
如图 4所示, N个子帧上给定聚合度 L时,所有 (E)PDCCH候选个数为 Νχ Μ、", 及 i^f号衰示为 #i〜# Nx MW 。 这样, 相当于在这样的集合里需要找到 κ个承载该
CK
DCI副本的 (E)PDCCH候选, 属于排列组合问题。 共有 w(i ^个 (E)PDCCH重复路
cK
径的可能。 因此, MTC UE需要穷尽搜索 Μ Ν次才可能找到聚合度为 L的正确的 (E)PDCCH在 Ν个子帧上重复传输 Κ次的路径。 在每个子帧上, 每个 (E)PDCCH候 选 (candidate) 的搜索空间即所占的 CCEs可以根据现有标准确定。 这个盲检测的复 杂度同样很大。
基于上述列举的两种情况, 尽管时域上重复发送 (E)PDCCH 的方法能够改善 MTC UE接收下行控制信令的质量, 但是该盲检测的复杂度也会相应的增加。 因此, 有必要设计一种有效的 (E)PDCCH重复发送的方法, 在提高覆盖性能的同时, 也保证 一个合理的终端盲检测的复杂度。
本发明实施例提供一种信息发送方法、信息检测方法及其装置、通信系统, 在多 个子帧上重复发送 (E) PDCCH时, 其中可通过上述候选路径集合的子集来发送和 检测 (E) PDCCH, 从而可减少盲检测的复杂度。
在网络侧 (如基站), 可先确定承载控制信息 (如 DCI信令) 的 (E)PDCCH候选 路径的集合, 如上所述, 每个候选路径可为 (E)PDCCH候选标号的组合, 即候选标号 之间的关系。 这样, 在重复发送 (E)PDCCH时, 该基站可选取其中一种候选路径, 根 据该候选路径的各个 (E)PDCCH候选标号之间的关系选取不同 TTI上相应的
(E)PDCCH候选来发送承载的控制信息。 其中, 承载控制信息 (如 DCI信令) 的 E)PDCCH候选标号 (Candidate Number) 之间的关系可以是确定的关系。 这样, 在
重复发送 (E)PDCCH时, 网络侧可按照该确定的关系来发送承载控制信息的 (E) PDCCH。 其中, 控制信令可为 DCI。
在用户设备侧, 定义了一种新的用户专用的搜索空间, 该用户专用的搜索空间即 为上述的候选路径, 即指在不同子帧上、 承载控制信息的 (E) PDCCH候选组合而 成的候选路径, 该候选路径可为所有候选路径所构成的集合的子集。
此外, 还可预定每个 UE所需要监测的候选路径的个数。 在每条路径上, 各个 (E)PDCCH候选标号之间的关系可以是确定的关系, 如通过网络侧通知 UE或者是双 方既定的关系或者是按照预定的关系式 (如公式 flmction) 计算出该路径下不同 TTI 的 (E)PDCCH候选标号, 继而按照现有标准计算出每个 (E)PDCCH候选标号所占的 CCEs资源。 这样, 该用户设备可根据该用户专用的搜索空间进行检测, 可减少盲检 测的次数。
以下结合附图对本发明实施例进行说明。
实施例 1
本发明实施例 1提供一种信息发送方法。 该方法包括:
在多个子帧上重复发送控制信息时,利用不同子帧上、承载控制信息的下行控制 信道或增强的下行控制信道(PDCCH或 EPDCCH) 的候选组合成的候选路径中的一 条路径发送该 PDCCH或 EPDCCH。
在本实施例中, 该基站可选取一个候选路径, 根据该候选路径的各个 (E)PDCCH 候选标号之间的关系选取不同子帧 (TTI) 上相应的 (E)PDCCH候选来发送承载的控 制信息;
其中, 该候选路径的数量可小于等于该 PDCCH或 EPDCCH的候选组合成的所 有路径的数量。 不同子帧上、 承载控制信息的 PDCCH或 EPDCCH的候选组合成的 候选路径与图 3、 4所示的类似, 并且为了进一步减少用户设备盲检测复杂度, 可使 该候选路径的数量小于组合成的所有路径的数量,即候选路径为所有候选路径构成集 合的子集。
在本实施例中,在承载控制信息(如 DCI信令)的 (E)PDCCH候选路径的集合中, 每个候选路径为 (E)PDCCH候选标号的组合 (每个候选标号与子帧对应), 即候选标 号之间的关系。 这样, 确定候选路径也就是要确定候选标号之间的关系。
这样, 在重复发送 (E)PDCCH时, 网络侧, 如基站选取该候选路径集合中的一种 候选路径, 根据该候选路径的各个 (E)PDCCH候选标号之间的关系选取不同子帧(即 TTI)上相应的 (E)PDCCH候选来发送承载的控制信息。也就是说,承载控制信息(如 DCI信令) 的 (E)PDCCH候选标号 (Candidate Number) 之间的关系, 即候选路径可 以是确定的关系。 这样, 在重复发送 (E)PDCCH时, 网络侧可按照该确定的关系来发 送承载控制信息的 (E) PDCCH。 其中, 控制信令可为 DCI。 例如, 按照图 3中箭头 所示的路径来发送。
由上述实施例可知, 通过确定的候选路径发送该(E) PDCCH, 可减少用户设备 盲检测的次数。
在本实施例中, 该候选路径, 即候选标号之间的关系可由高层信令 (如 RRC信 令)配置并通知用户设备; 或者, 按照预定的关系式 (如预定的公式)计算, 该关系 式可为基站和用户设备公知; 或者, 按照基站和用户设备公知的关系来确定该。
在本实施例中, 上述承载控制信息的 (E) PDCCH候选标号之间的关系可构成 候选路径 (candidate path) 的集合, 通过该关系, 即候选路径来发送 (E) PDCCH。 其中, 网络侧可通过比特位图(bitmap)来指示该(E) PDCCH候选标号之间的关系, 即指示发送该 (E) PDCCH的路径; 或者可通过预定的关系式来计算该路径; 或者 在基站侧和用户设备侧约定所使用的路径。
例如, 对于上述第一种在多个子帧上重复发送 (E) PDCCH的情况, 该候选路 径可以表示为在不同子帧上发送的控制信息是由具有相同或不同标号的逻辑 (E) PDCCH候选承载的。
图 5和图 6以聚合度 AL=8的 DCI传输, (E) PDCCH的候选数为 2个为例进行 说明。
如图 5所示, (E) PDCCH候选之间的关系为: 在子帧 1至 N上, 即第 1至 N 个发射时间间隔 (TTI, Transmission Time Interval) 上, 发送的控制信息是由具有相 同标号 (如 #1、 #2) 的逻辑 PDCCH候选承载, 即第一个候选路径的 (E) PDCCH候 选的标号均为 #1, 第二个候选路径的 (E) PDCCH候选的标号均为 #2。 即在第 1个 子帧( 1st subframe)承载实际 DCI传输的 PDCCH候选号 (candidate number)是 #1, 后续 N-1个子帧发送 DCI的 PDCCH候选号也是 #1; 在第一个子帧 ( 1st subframe) 承载实际 DCI传输的逻辑 PDCCH候选号 (candidate number) 是 #2, 后续 N-1个子
帧发送 DCI的逻辑 PDCCH候选号也是 #2。通过该方法,在 N个子帧上承载实际 DCI 传输的逻辑 PDCCH候选号是相同的。从而,在该情况下,假定在某个聚合度时, (E) PDCCH候选路径的 (repetition candidate path) 个数与起始子帧下所定义的 PDCCH 候选个数相同。
此外,如图 6所示,发送的控制信息还可以是由具有不同标号的逻辑(E) PDCCH 候选承载。
由上述可知, 在聚合度 AL=8、 (E) PDCCH的候选数为 2的情况下, 在 N个子 帧上重复发送(E) PDCCH时, 所有路径的数量为 (M(i) , 即(M(8))w = 2W, 其中,
N大于 1,; 而确定的候选路径的数量为 2, 即候选路径为所有路径的子集。
由上述实施例可知, UE在盲检测 N个 DCI时,某个聚合度 AL下至多盲检测 M {L) 次, 而按照目前的机制, 需检测 (Μ(" 次, 可见, 通过本发明实施例可大大减少盲 检测的次数。
对于上述第二种情况, 与第一种情况类似, 预先确定承载控制信息的 PDCCH候 选标号之间的关系, 即候选路径, UE在盲检测 N个 DCI时, 某个聚合度 AL下至多 盲检测 次, 而按照目前的机制, 需检测 C^ )7V次, y¾)小于 C Ww, 可见, 通过本发明实施例可大大减少盲检测的次数。
实施例 2
图 7是本发明实施例 2的信息发送方法流程图。 基于实施例 1, 与实施例 1的不 同之处在于, 该候选路径的数量可预先确定,如可通过预知的关系表来确定每个聚合 度下最多可能监测的候选路径个数。
如图 7所示, 该方法包括:
步骤 701, 确定监测的候选路径的数量;
在本实施例中, 该候选路径是由承载控制信息的 PDCCH或 EPDCCH的候选组 合成的;
为了减少用户盲检测次数, 可预先确定候选路径的数量, 例如, 可由网络侧, 如 基站配置该数量、或者按照预定的关系来确定该数量; 该数量可小于所有可能的路径 的数量;
例如, 可预先确定每个聚合度下的候选路径个数, 如表 2和表 3所示, 通过查表 来确定该数量, 在下面介绍。
步骤 702, 在该预定数量的候选路径中选取一条候选路径发送承载控制信息 PDCCH或 EPDCCH;
其中, 发送过程与实施例 1类似, 此处不再赘述。
在本实施例中, 对应第一种情况, 例如, 在步骤 701中, 定义表 2, 给出在预定 覆盖目标下 (或者重复的 N个 TTI下), UE需要监测的 (E)PDCCH候选路径的数量。 该表 2可用于确定不同聚合度下重复 (repetition) 次数为 Ml, 网络侧 (如基站) 在 重复发送 (E)PDCCH时, 从表 2所定义的候选路径中选取其中一种来重复发送 (E)PDCCH0此外, 表 2也确定了 UE需要监测的 (E)PDCCH候选路径的个数。如表 2 所示, 在聚合度为 1时, 候选路径的数量为 A(1) ; 在聚合度为 2时, 候选路径的数量 为 A(2) ; 在聚合度为 4时, 候选路径的数量为 A(4) ; 在聚合度为 8时, 候选路径的数 量为 A(8)。
表 2: 在时域上重复发送 (E)PDCCH时, UE需要监测的候选路径个数
在表 2中, Α(Ι^Ι^=1,2,4,8)的取值大小可小于完备集合的大小 , 该数值大 小可以等于相应的聚合度下每个 TTI的 PDCCH候选个数即 M L、。 其中每条候选路 径各个 (E)PDCCH候选标号( E)PDCCH candidate number)之间的关系可以确定的关 系, 或者是通过预定的关系式 (fimction) 计算出来。
在本实施例中, 对应第二种情况, 例如, 在步骤 701中, 定义表 3, 用于确定不 同聚合度下在 N个 ΤΉ上重复 (repetition) 次数为 M2, 网络侧 (如基站) 在重复发 送 (E)PDCCH时, 从表 3所定义的候选路径中选取其中一种来重复发送 (E)PDCCH。 此外, 表 3也确定了 UE需要监测的 (E)PDCCH候选路径的个数。 如表 3所示, 在聚 合度为 1时, 候选路径的数量为 B(1) ; 在聚合度为 2时, 候选路径的数量为 B(2) ; 在 聚合度为 4时, 候选路径的数量为 B(4) ; 在聚合度为 8时, 候选路径的数量为 B(8)。
表 3: 重复发送 (E)PDCCH时, UE需要监测的候选路径个数
同理,在表 3中, B(I^L=1,2,4,8)的取值大小 /(( ^可小于完备集合的大小 CMW]V。 其中每条候选路径各个 (E)PDCCH候选标号((E)PDCCH candidate number)之间 的关系可以确定的关系, 或者是通过预定的关系式 (flmction) 计算出来。
在表 2和表 3中, 重复次数 Ml和 M2可为任意整数, 如 10次、 20次等, Aw (L=l,2,4,8) Β(Ι^ =1,2,4,8)的取值可根据实际情况来定。
实施例 3
图 8是本发明实施例 2的信息检测方法流程图。 如图 8所示, 该方法包括: 步骤 801, 确定承载控制信息的 PDCCH或 EPDCCH的候选路径, 其中, 由不同 子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成该候选路径;
在本实施例中, 该候选路径也可称为该用户专用的搜索空间, 该用户设备可在该 用户专用的搜索空间中针对每个候选路径进行检测;
在本实施例中, 确定该候选路径也就是确定该 (E) PDCCH候选标号之间的关 系, 例如, 用户设备可接收网络侧配置的每条路径候选上该承载控制信息的 (E) PDCCH候选标号之间的关系, 从而根据该关系确定用户专用的搜索空间; 此外, 该 用户设备还可根据预定的计算式来计算获得; 或者基站和用户设备预先预定这种关 系。
步骤 802, 根据该候选路径进行检测, 即根据确定的该用户专用的搜索空间进行 检测;
在本实施例中, 在确定候选路径后, 对于每个候选路径对应的不同子帧上 (E) PDCCH候选数所占 CCEs可采用现有标准来计算, 如背景技术中的公式 (1 ) - (2), 此处不再赘述。
在本实施例中, 承载该控制信息的 (E) PDCCH候选路径是所有可能的候选所 构成集合的子集。 例如, 在 N个子帧上发送且在每个子帧上发送一次 (E) PDCCH
时,所有候选路径的数量为 ,在 N个子帧上发送且在每个子帧上发送 K次 (E) PDCCH时, 所有级联的数量为 C (¾r, 这样该搜索空间的路径候选的数量为该集合 的子集, 其中, N、 K均为正整数。
在本实施例中, 该子集的大小可通过定义新表 2或表 3获知。 即, 可通过定义新 表 2或表 3确定不同聚合度 AL下不同重复(repetition)次数下的 (E) PDCCH候选 构成的候选路径个数。
因此, 在本实施例中, 该方法还可包括: 根据预定的关系表, 如表 2或表 3确定 不同聚合度 AL下不同重复(repetition)次数下的 (E) PDCCH候选组合成的候选路 径个数。 这样, 在步骤 801中, 该用户设备在确定数量的候选路径上进行检测。
由上述实施例可知, 在网络侧 (如基站), 选取其中一种候选路径, 根据候选路 径上各个 (E)PDCCH候选标号之间的关系选取不同 TTI上相应的 (E)PDCCH候选来承 载控制信息的发送。其中承载控制信息(如 DCI信令)的 (E)PDCCH候选(Candidate Number) 之间的关系可以是确定的关系。 这样, 在重复发送 (E)PDCCH时, 网络侧 可按照该关系来发送承载控制信息的 (E) PDCCH。 其中, 控制信令可为 DCI。
在用户设备侧, 定义了一种新的用户专用的搜索空间, 该用户专用的搜索空间是 指在不同子帧上承载该 (E) PDCCH候选的组合成的候选路径, 该候选路径可为所 有路径集合的子集。 如上述所示, 定义每个 UE所需要监测的候选路径的个数。 每条 路径各个 (E)PDCCH候选标号之间的关系可以是确定的关系, 如通过网络侧通知 UE 或者是双方既定的关系或者是按照 flmction表达式用户计算出该路径下不同 ΤΉ的 (E)PDCCH候选标号,继而按照现有标准计算出每个 (E)PDCCH候选标号所占的 CCEs 资源。这样, 该用户设备可根据该用户专用的搜索空间进行检测, 可减少盲检测的次 数。
由上述实施例可知, UE在盲检测 N个 DCI时,某个聚合度 AL下至多盲检测 M " 次, 而按照目前的机制, 需检测 次, 可见, 通过本发明实施例可大大减少盲 检测的次数。
对于上述第二种情况, 与第一种情况类似, 预先确定承载控制信息的 PDCCH候 选之间的关系, 即路径候选, UE在盲检测 N个 DCI时, 某个聚合度 AL下至多盲检 测 次, A 、 < C N, 而按照目前的机制, 需检测 ¾次, 可见, 通过本发明 实施例可大大减少盲检测的次数。
以下以每条候选路径上不同 TTI采用的 (E)PDCCH候选标号通过公式计算得出为 例对该检测过程进行说明。
UE在盲检测重复发送 (E)PDCCH (即 (E)PDCCH repetition)时, 首先需要确定每 次 (E)PDCCH repetition的起始子帧 (subframe) 以及重复所使用的 TTI个数 N。 然后 确定每条候选路径上 N个子帧上 (E)PDCCH候选标号。
例如, 当 UE确定某次 (E)PDCCH repetition的起始 subframe #k以及后续 subframe #k+l~#k+N-l共 N个 TTI ( i=0,l,2,...,Ν-l)用于重复发送该 (E)PDCCH时, 每条候选 路径上不同 TTI采用的 (E)PDCCH候选标号可以通过公式计算得出;
其中, 该公式与用户的无线网络标识 (R TI)、 该次 (E)PDCCH repetition的起始 subframe #k、 该次 (E)PDCCH repetition的第 i个 TTI (i=0,l,2,...,N-l)以及候选路径标 号#& (a=l,2,...,A 有关。
下述给出一种计算聚合度 AL=L时, 候选路径标号 #a的在 N个 TTI上所采用的 (E)PDCCH候选标号的表达式:
m = ix M(L) + (Ek+i + a) mod M(L) (3)
其中, "^0,1,…^", ^ 1,…'^"^表示聚合度 AL=L时, N个 TTI上所有 PDCCH候选级联而成的逻辑标号。 " ,1,…,八^表示用户监测的聚合度 AL=L时候 选路径的标号;
=04· —)modD,类似于公式 (1), ΕΛ=η ^ = 39827, = 65537, k衰 示该 (E)PDCCH重复传输的起始子帧标号,
通过上述公式,计算出了 AL=L时,候选路径标号 #a的在该次 (E)PDCCH repetition 的第 i个 TTI的 (E)PDCCH候选标号。
上述表达式 (3) 仅为本发明实施例, 但不限于上述表达式。
实施例 4
图 9是本发明实施例 4的信息发送装置构成示意图。如图 9所示,装置 900包括: 信息发送单元 901, 信息发送单元 901用于在多个子帧上重复发送控制信息, 其中利 用不同子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成的候选路径中的一 条路径发送该 PDCCH或 EPDCCH。
在本实施例中, 该候选路径的数量小于等于该 PDCCH或 EPDCCH候选组合成 的所有路径的数量。 且发送该 (E) PDCCH与实施例 1和 2类似, 可此不再赘述。
在本实施例中, 该候选路径可按照承载控制信息的 (E) PDCCH候选标号之间 的关系来表示。
由上述实施例可知, 通过确定的候选路径来发送该 (E) PDCCH, 这样, 用户设 备在盲检测 DCI时, 可大大减少盲检测的次数。
如图 9所示, 装置 900还可包括第一路径确定单元 902, 第一路径确定单元 902 用于通过高层信令配置该候选路径; 或者按照预定的关系式计算该候选路径; 或者, 按照预存的路径信息确定该候选路径。
在本实施例中, 装置 900还可包括信息通知单元 (图中未示出), 该信息通知单 元用于将配置的上述候选路径通知该用户设备。
此外, 还可包括存储单元(图中未示出), 该存储单元可用于储存上述候选路径。 在本实施例中, 装置 400还包括第一路径数量确定单元 (图中未示出), 该第一 路径数量确定单元用于预先配置该候选路径的数量; 或者,根据预先存储路径数量信 息确定该候选路径的数量。
与实施例 2类似, 如根据表 2或表 3来确定, 此处不再赘述。
在本实施例中, 装置 900为网络侧设备, 可为基站。
实施例 5
图 10是本发明实施例 5的信息检测装置构成示意图。 如图 10所示, 装置 1000 包括: 搜索空间确定单元 1001和检测单元 1002; 其中, 搜索空间确定单元 1001用 于确定承载控制信息的 PDCCH或 EPDCCH的候选路径, 其中, 由不同子帧上、 承 载控制信息的 PDCCH或 EPDCCH候选组合成该候选路径; 检测单元 1002用于根据 该候选路径对应的路径进行检测。
其中, 具体的确定搜索空间和检测的方法如实施例 3所述, 此处不再赘述。 在本实施例中, 装置 1000还可包括接收单元(未示出), 该接收单元用于接收网 络侧配置的上述候选路径; 或者, 装置 1000还可包括计算单元(未示出), 该计算单 元用于根据预定的关系式计算上述候选路径。
此外, 装置 1000还可包括存储单元 (未示出), 用于储存获得的上述候选路径、 或者储存用于计算上述候选路径的关系式。
在本实施例中, 装置 1000的检测过程如实施例 2所述, 此处不再赘述。
在本实施例中, 装置 1000还包括第二路径数量确定单元(未示出), 该第二路径 数量确定单元用于接收网络侧预先配置的该候选路径的数量; 或者,根据预先存储路 径数量信息来确定该候选路径的数量。
在本实施例中, 装置 1000可为用户设备。
由上述实施例可知, 通过本发明实施例, UE在盲检测 N个 DCI时, 可大大减少 盲检测的次数。
实施例 6
本发明实施例 6提供一种基站, 该基站包括实施例 3所述的信息发送装置,其具 体结构如实施例 4所述, 此处不再赘述。
图 11是本发明实施例 6的基站构成示意图。 如图 11所示, 基站 1100包括: 信 息发送单元 1103, 其构成和作用如实施例 4所示。
此外, 还包括主控制电路 1101、 存储器 1102、 收发机 1104和天线 1105 ; 其中, 该存储器 1102可存储进行信息发送的程序,并且在主控制器 1101的控制下执行该程 序, 该程序执行的过程如实施例 1所述, 此处不再赘述。其他部件的功能与现有技术 类似, 此处不再赘述。 此外, 信息发送单元 1103可与主控制电路 1101合并在一起使 用, 存储器 1102可存储承载 (E) PDCCH的候选之间的关系。
实施例 7
本发明实施例 7提供一种用户设备,该用户设备包括实施例 5所述的信息检测装 置, 具体构成如实施例 5所述, 此处不再赘述。
图 12是本发明实施例 7的用户设备构成示意图。 如图 12所示, 用户设备 1200 包括信息检测单元 1203, 其构成和作用如实施例 5所述, 此处不再赘述。
例如该用户设备为移动电话, 该图仅仅是示例性的; 移动电话 1200还可以具有 其他类型的电路部件, 来补充或代替该操作电路, 以实现通信功能或其他功能。 显然 移动电话 1200也并不是必须要包括图 12中所示的所有部件。
如图 12所示, 该移动电话 1200包括主控制电路 1201、 收发机 1206、 输入单元
1204、音频处理单元 1207、存储器 1202、 显示器 1209、 电源 1210。 主控制电路 1201 有时也称为控制器或操作控件, 可以包括微处理器或其他处理器装置和 /或逻辑装置, 该主控制电路 1201接收输入并控制移动电话 1200的各个部件的操作。
其中, 存储器 1202, 例如可以是缓存器、 闪存、 硬驱、 可移动介质、 易失性存 储器、非易失性存储器或其它合适装置中的一种或更多种。可储存上执行上述信息检 测程序。并且主控制器电路 1201可执行该存储器 1202存储的该程序, 以实现信息检 测。 其他部件的功能与现有类似, 此处不再赘述。
移动电话 1200的各部件可以通过专用硬件、 固件、 软件或其结合来实现, 而不 偏离本发明的范围。
实施例 8
图 13是本发明实施例 8的通信系统构成示意图。如图 13所示, 该通信系统包括 基站和用户设备,其中该基站可为实施例 6所述的基站, 该用户设备为实施例 7所述 的用户设备, 其中, 基站发送信息的方法如实施例 1、 2所述, 该用户设备检测信息 的过程如实施例 3所述, 此处不再赘述。
由上述实施例可知,由上述实施例可知,通过确定的候选路径发送该(E)PDCCH, 可减少用户设备盲检测的次数;
以下结合具体的实例对本发明实施例的有益效果进行说明。
例 1, 对于第一种情况, 如聚合度 AL=8, 候选数 (£) =2, N=3 (子帧数量)。 如果按照现有基站, 用户设备在进行盲检测时, 需要穷搜(Mw)w =23=8次才可 能找到聚合度为 8的正确的 (E) PDCCH在 3个子帧上重复传输 N次的路径, 而每 个子帧上每个 (E) PDCCH候选的搜索空间即所占 CCEs可以根据现有标准确定。
如果采用本发明实施例的上述方法, 基站侧:
通过高层信令配置承载控制信息的 (E) PDCCH候选标号之间的关系 (配置候 选路径), 如按照图 5进行配置, 并将配置的该候选路径通知用户设备, 并按照配置 的上述候选路径发送 (E)PDCCH。
用户设备侧:
用户设备确定用户专用的搜索空间, 由于对应的(Mw)w =8种可能的路径, 但 该用户专用的搜索空间为该 8种可能的路径中的子集, 即少于 8种, 如图 5所示, 可 能的路径为 2种。 如按照图 1所示的路径进行检测, 只需要盲检测 (£) =2次, 不需 要盲检测 8次, 由此可知, 盲检测次数大大降低。
如图 6所示的候选路径也为 2种, 也不需要用户设备盲检测 8次。
例 2, 对于第二种情况, 如聚合度 AL=8, 候选数 Mw =2, N=3 (子帧数量), K=5 (—共重复发送的次数, 即 repetition次数)。
如果按照现有基站, 用户设备在进行盲检测时, 需要穷搜 C^ )jv =6次才可能找 到聚合度为 8的正确的 (E) PDCCH在 3个子帧上重复传输的路径, 而每个子帧上 每个 (E) PDCCH候选的搜索空间即所占 CCEs可以根据现有标准确定。
如果采用本发明实施例的上述方法, 基站侧:
通过高层信令配置承载控制信息的 (E) PDCCH候选标号之间的关系, 即候选 路径, 如按照图 5进行配置, 并将配置的该候选路径通知用户设备, 并选取一条候选 路径发送 (E)PDCCH。
用户设备侧: 用户设备根据预定的上述关系确定用户专用的搜索空间, 由于对应的 M(i)JV =6 种可能的路径, 但该用户专用的搜索空间为该 6种可能的路径中的子集, 即少于 6 种。
在上述实施例中, 网络侧可通过比特位图 (bitmap)来指示上述路径, 此外, 还 可通过预定的关系式来计算该路径, 或者通过若干个比特来指示上述路径。
由上述实施例可知, UE在盲检测 N个 DCI时, 某个聚合度 AL下至多盲检测 M 次, 而按照目前的机制, 需检测(Μ(")Λί次, 可见, 通过本发明实施例可大大 减少盲检测的次数。
对于上述第二种情况, 与第一种情况类似, 预先确定承载控制信息的 PDCCH候 选之间的关系, 即路径候选, UE在盲检测 N个 DCI时, 某个聚合度 AL下至多盲检 测/ ( )次, N、 M(¾r而按照目前的机制, 需检测 M(¾r次, 可见, 通过本发明 实施例可大大减少盲检测的次数。
由上述实施例可知, 在网络侧 (如基站), 选取其中一种候选路径, 根据候选路 径上各个 (E)PDCCH候选标号之间的关系选取不同 TTI上相应的 (E)PDCCH候选来承 载控制信息的发送。 承载控制信息 (如 DCI信令) 的 (E)PDCCH候选 (Candidate Number) 之间的关系可以是确定的关系。 这样, 在重复发送 (E)PDCCH时, 网络侧 可按照该关系来发送承载控制信息的 (E) PDCCH。 其中, 控制信令可为 DCI。
在用户设备侧, 定义了一种新的用户专用的搜索空间, 该用户专用的搜索空间是 指在不同子帧上承载该 (E) PDCCH候选所组合成的路径候选, 该路径候选可为所 有路径集合的子集。 如上述所示, 定义每个 UE所需要监测的候选路径的个数。 每条 路径各个 (E)PDCCH候选标号之间的关系可以是确定的关系, 如通过网络侧通知 UE 或者是双方既定的关系或者是按照 flmction表达式用户计算出该路径下不同 ΤΉ的 (E)PDCCH候选标号,继而按照现有标准计算出每个 (E)PDCCH候选标号所占的 CCEs 资源。这样, 该用户设备可根据该用户专用的搜索空间进行检测, 可减少盲检测的次 数。
实施例 9
本发明实施例 9还提供一种信息配置方法, 该方法包括: 配置聚合度与候选路径 的数量之间的映射关系; 其中由不同子帧上、 承载控制信息的 PDCCH或 EPDCCH 候选组合成该候选路径。
其中, 该映射关系可通过表来指示, 如表 2或表 3所示的关系。
在本实施例中, 配置的该候选路径的数量小于等于该 PDCCH或 EPDCCH候选 组合成的所有路径的数量。
实施例 10
本发明实施例 10还提供一种信息配置装置。 该装置包括: 信息配置单元, 该信 息配置单元用于配置聚合度与候选路径的数量之间的映射关系; 其中由不同子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成该候选路径。 具体配置的映射关系 如表 2或表 3所示, 此处不再赘述。
实施例 11
本发明实施例 11还提供一种基站, 该基站可包括实施例 10所述的装置。
实施例 12
本发明实施例 12还提供一种通信系统,该通信系统可包括实施例 11所述的基站。 本发明实施例还提供一种计算机可读程序,其中当在信息发送装置或基站中执行 所述程序时, 所述程序使得计算机在所述信息发送装置或基站中执行实施例 1、 2所 述的信息发送方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质,其中所述计算机可 读程序使得计算机在信息发送装置或基站中执行实施例 1、 2所述的信息发送方法。
本发明实施例还提供一种计算机可读程序,其中当在信息发送装置或用户设备中 执行所述程序时,所述程序使得计算机在所述信息检测装置或用户设备中执行实施例
3所述的信息检测方法。 本发明实施例还提供一种存储有计算机可读程序的存储介 质, 其中所述计算机可读程序使得计算机在信息检测装置或用户设备中执行实施例 3 所述的信息检测方法。
本发明实施例还提供一种计算机可读程序,其中当在信息配置装置或基站中执行 所述程序时,所述程序使得计算机在所述信息配置装置或基站中执行实施例 9所述的 信息配置方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质,其中所述计算机可 读程序使得计算机在信息配置装置或基站中执行实施例 9所述的信息配置方法。
本发明以上的装置和方法可以由硬件实现, 也可以由硬件结合软件实现。本发明 涉及这样的计算机可读程序, 当该程序被逻辑部件所执行时, 能够使该逻辑部件实现 上文所述的装置或构成部件, 或使该逻辑部件实现上文所述的各种方法或步骤。逻辑 部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本发明还涉及 用于存储以上程序的存储介质, 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚,这 些描述都是示例性的, 并不是对本发明保护范围的限制。本领域技术人员可以根据本 发明的精神和原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围 内。
Claims
1、 一种信息发送方法, 所述方法包括:
在多个子帧上重复发送控制信息时,利用不同子帧上、承载控制信息的下行控制 信道或增强的下行控制信道(PDCCH或 EPDCCH)候选组合成的候选路径中的一条 路径发送所述 PDCCH或 EPDCCH。
2、根据权利要求 1所述的方法,其中,所述候选路径的数量小于等于所述 PDCCH 或 EPDCCH候选组合成的所有路径的数量。
3、 根据权利要求 1所述的方法, 其中, 所述方法还包括:
由高层信令配置所述候选路径; 或者,
按照预定的关系式计算所述候选路径; 或者,
按照预存的路径信息确定所述候选路径。
4、 根据权利要求 1所述的方法, 其中, 所述方法还包括:
预先配置所述候选路径的数量; 或者,
预先存储所述候选路径的数量。
5、 一种信息检测方法, 所述方法包括:
确定承载控制信息的 PDCCH或 EPDCCH的候选路径, 其中, 由不同子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成所述候选路径;
根据所述候选路径对应的路径进行检测。
6、 根据权利要求 5所述的方法, 其中, 所述方法还包括:
接收网络侧配置的承载控制信息的 PDCCH或 EPDCCH的候选路径; 或者, 按照预定的关系式计算所述候选路径; 或者,
按照预存的路径信息确定所述候选路径。
7、根据权利要求 5所述的方法,其中,所述候选路径的数量小于等于所述 PDCCH 或 EPDCCH候选组合成的所有路径的数量。
8、 根据权利要求 7所述的方法, 其中, 所述方法还包括:
接收网络侧预先配置的所述候选路径的数量; 或者,
预先存储所述候选路径的数量。
9、 根据权利要求 1或 5所述的方法, 其中, 在 N个子帧上发送且在每个子帧上 发送一次 PDCCH或 EPDCCH时,不同子帧上、承载控制信息的 PDCCH或 EPDCCH 候选组合成的所有路径的数量为 M(L N;
在 N个子帧上发送且在每个子帧上发送 K次 PDCCH或 EPDCCH时, 不同子帧 上、 承载控制信息的 PDCCH或 EPDCCH候选组合成的所有路径的数量为。^ , 其中, N、 K均为正整数。
10、 根据权利要求 3或 6所述的方法, 其中, 按照关系式计算候选路径时, 所述 关系式与用户设备的无线网络标识、 当前次重复发送 PDCCH或 EPDCCH的起始帧 号、 当前次重复发送 PDCCH或 EPDCCH的第 i个传输时间间隔(TTI)、 以及候选路 径标号 #a有关; 其中, i=0,l,2,...,N-l ; a=l,2,..., A(Ij) 。
11、 一种信息发送装置, 所述装置包括:
信息发送单元,所述信息发送单元用于在多个子帧上重复发送控制信息,其中利 用不同子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成的候选路径中的一 条路径发送所述 PDCCH或 EPDCCH。
12、 根据权利要求 11所述的装置, 其中, 所述候选路径的数量小于等于所述
PDCCH或 EPDCCH候选组合成的所有路径的数量。
13、 根据权利要求 11所述的装置, 其中, 所述装置还包括第一路径确定单元, 所述第一路径确定单元用于通过高层信令配置所述候选路径; 或者, 按照预定的关系 式计算所述候选路径; 或者, 按照预存的路径信息确定所述候选路径。
14、 根据权利要求 11所述的装置, 其中, 所述装置还包括第一路径数量确定单 元, 所述第一路径数量确定单元用于预先配置所述候选路径的数量; 或者, 根据预先 存储路径数量信息确定所述候选路径的数量。
15、 一种信息检测装置, 所述装置包括:
搜索空间确定单元,所述搜索空间确定单元用于确定承载控制信息的 PDCCH或 EPDCCH的候选路径, 其中, 由不同子帧上、 承载控制信息的 PDCCH或 EPDCCH 候选组合成所述候选路径;
检测单元, 所述检测单元用于根据所述候选路径对应的路径进行检测。
16、 根据权利要求 15所述的装置, 其中, 所述装置还包括第二路径确定单元, 所述第二路径确定单元用于接收网络侧配置的承载控制信息的 PDCCH或 EPDCCH
的候选路径; 或者, 按照预定的关系式计算所述候选路径; 或者, 按照预存的路径信 息确定所述候选路径。
17、 根据权利要求 15所述的装置, 其中, 所述候选路径的数量小于等于所述 PDCCH或 EPDCCH候选组合成的所有路径的数量。
18、 根据权利要求 17所述的装置, 其中, 所述装置还包括第二路径数量确定单 元,所述第二路径数量确定单元用于接收网络侧预先配置的所述候选路径的数量; 或 者, 根据预先存储路径数量信息来确定所述候选路径的数量。
19、 一种基站, 所述基站包括权利要求 11所述的装置。
20、 一种用户设备, 所述用户设备包括权利要求 15所述的装置。
21、 一种通信系统, 所述通信系统包括权利要求 19所述的基站和权利要求 20 所述的用户设备。
22、 一种信息配置方法, 所述方法包括:
配置聚合度与候选路径的数量之间的映射关系; 其中由不同子帧上、承载控制信 息的 PDCCH或 EPDCCH候选组合成所述候选路径。
23、 根据权利要求 22所述的方法, 其中, 所述候选路径的数量小于等于所述
PDCCH或 EPDCCH候选组合成的所有路径的数量。
24、 一种信息配置装置, 所述装置包括:
信息配置单元,所述信息配置单元用于配置聚合度与候选路径的数量之间的映射 关系; 其中由不同子帧上、 承载控制信息的 PDCCH或 EPDCCH候选组合成所述候 选路径。
25、 一种基站, 包括权利要求 24所述的装置。
26、 一种通信系统, 包括权利要求 25所述的基站。
27、 一种计算机可读程序, 其中当在信息发送装置或基站中执行所述程序时, 所 述程序使得计算机在所述信息发送装置或基站中执行权利要求 1至 4、 10的任一项权 利要求所述的信息发送方法。
28、一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算 机在信息发送装置或基站中执行权利要求 1至 4、 10的任一项权利要求所述的信息发 送方法。
29、一种计算机可读程序,其中当在信息检测装置或用户设备中执行所述程序时, 所述程序使得计算机在所述信息检测装置或用户设备中执行权利要求 5至 10的任一 项权利要求所述的信息检测方法。
30、一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算 机在信息检测装置或用户设备中执行权利要求 5至 10的任一项权利要求所述的信息 检测方法。
31、 一种计算机可读程序, 其中当在信息配置装置或基站中执行所述程序时, 所 述程序使得计算机在所述信息配置装置或基站中执行权利要求 22或 23所述的信息配 置方法。
32、一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算 机在信息配置装置或基站中执行权利要求 22或 23所述的信息配置方法。
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