WO2014176935A1 - 随机接入信道资源配置方法和系统 - Google Patents
随机接入信道资源配置方法和系统 Download PDFInfo
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- 238000013468 resource allocation Methods 0.000 title abstract description 7
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- 230000005540 biological transmission Effects 0.000 claims description 43
- 238000013507 mapping Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 description 45
- 238000010586 diagram Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 12
- 230000006870 function Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- 238000004590 computer program Methods 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
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Classifications
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- 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
- 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
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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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
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
Definitions
- the present invention relates to the field of communications, and in particular, to a method and system for configuring a random access channel resource. Background technique
- MTC User Terminal MTC User Equipment, MTC UE
- M2M user communication equipment also known as Machine to Machine (M2M) user communication equipment
- GSM Global System of Mobile communication
- LTE Long Term Evolution
- LTE-A LTE-based evolution
- M2M multi-class data services based on LTE/LTE-A will also be more attractive. Only when the cost of the LTE-M2M device can be lower than the MTC terminal of the GSM system can the M2M service actually switch from GSM to LTE system.
- the current main options for reducing the cost of MTC user terminals include: reducing the number of antennas received by the terminal, reducing the baseband processing bandwidth, reducing the peak rate supported by the terminal, using the half-duplex mode, and so on.
- the cost reduction means that the performance is degraded, and the demand for the LTE/LTE-A system cell coverage cannot be reduced. Therefore, the MTC terminal configured with low cost needs to take some measures to meet the coverage performance requirement of the existing LTE terminal. .
- the MTC terminal may be located in the underground room, corner, etc., and the scene is worse than the ordinary LTE UE. In order to compensate for the drop in coverage caused by the penetration loss, some MTC UEs need higher performance improvement.
- the location information of the time-frequency resource occupied by the random access response message (RAR) in the LTE/LTE-A system is included in the downlink control information (Downlink)
- the Control Information (referred to as DCI) is transmitted through the Physical Downlink Control Channel (PDCCH).
- the DCI information further includes a 16-bit Cyclic Redundancy Check (CRC), and the CRC further uses a 16-bit random access radio network temporary identifier (Random Access Radio Network Temporary Identity).
- RA-RNTI for the purpose of force 4, especially for the port 4:
- the present invention provides a method and system for configuring a random access channel resource, which solves the problem of MTC UE access in an LTE/LTE-A system.
- a method for configuring a random access channel resource includes:
- the first node sends random access channel resource configuration information to the second node, and the random access channel resource configuration information is indicated by one or more random access channel configuration information.
- the random access channel configuration information includes at least configuration information of the first resource, and the first resource is one of the following:
- a starting resource allocated for the second node to send random access signaling is allocated.
- the first resource occupies one or more first time domain metric units in the time domain, and occupies one or more first frequency domain metric units in the frequency domain.
- the first time domain metric unit is one of the following: Frame, Subframe, Half Frame, Time Slot, OFDM Symbol, Physical Resource Block (PRB), Physical Resource Block Group.
- PRB Physical Resource Block
- the first frequency domain measurement unit is one of the following:
- Subcarrier physical resource block (PRB), physical resource block group.
- PRB physical resource block
- the configuration information of the first resource includes at least one of the following:
- the configuration index information of the first resource indicates any one or any of the following information: a time domain location occupied by the first resource in the predefined time domain period in a predefined time domain period Distribution information, the predefined time domain period is described by the first time domain metric unit, and configured by the system or sent by the first node;
- the quantity information of the first resource is described by the first time domain metric unit, and configured by the system or sent by the first node.
- the frequency hopping pattern information of the first resource is not limited to the frequency hopping pattern information of the first resource.
- the system configuration refers to a standard configuration or a network configuration or a network high layer configuration.
- the location information of the first resource in the frequency domain is determined by frequency domain offset information of the first resource.
- the location information of the first resource in the frequency domain is at least one of the following:
- the first resource starts information of a resource location in a frequency domain
- the information of the initial resource location, the information of the ending resource location, and the information of the occupied resource location are measured by a first frequency domain metric.
- the frequency domain location distribution information of the first resource is offset by a frequency domain of the first resource.
- Information and configuration index information of the first resource are determined.
- the first resource has multiple locations in the frequency domain.
- the plurality of the first resources at the same time domain location are different in location in the frequency domain.
- the random access channel configuration information further includes:
- the frequency domain location distribution interval information of the first resource is the frequency domain location distribution interval information of the first resource.
- the frequency domain location distribution information of the first resource is determined by frequency domain offset information of the first resource, frequency domain location distribution interval information of the first resource, and configuration index information of the first resource.
- the configuration information of the first resource included in each random access channel configuration information is different.
- the random access channel resource is divided into one or more sets of random access channel resources, and the random access channel resource subsets are time division multiplexed and/or frequency division multiplexed and/or Or multiplexing the random access channel resources in a code division multiplexing manner.
- the random access channel resources are multiplexed in a time division multiplexing manner between the random access channel resource subsets:
- the first resource in the first resource in which the time domain location is within a predefined time domain set is allocated to a random access channel resource subset;
- the first resource in the first resource in a predefined time domain set and having the same frequency domain location is allocated to a random access channel resource subset;
- the first resource in the first resource is in a predefined time domain set and the first resource in the predefined frequency domain location is allocated to a random access channel resource subset.
- the predefined time domain set includes one or more time domain time points, and the time domain time point is measured by the first time domain measurement unit, and the one or more time domain time points Continuous or discrete distribution over the time domain.
- the predefined frequency domain location needs to meet the following conditions:
- the frequency domain locations of the first resources at two adjacent time domain time points are different; and/or, There are N different frequency domain locations in the predefined frequency domain location, and the predefined time domain set is divided into N subsets, and the frequency domain location of the first resource in each subset corresponds to the predefined One of the frequency domain positions, N is an integer greater than or equal to 1.
- the random access channel resource is multiplexed between the random access channel resource subsets by frequency division multiplexing:
- the first resource in the first resource with a frequency domain location in a predefined frequency domain set is allocated to a random access channel resource subset;
- the first resource has a frequency domain location within a predefined set of frequency domains and the first resource at a predefined time domain location is allocated to a subset of random access channel resources.
- the predefined frequency domain set includes one or more frequency domain points, and the frequency domain points are measured by the first frequency domain metric unit, and the one or more frequency domain points are in a frequency domain. Continuous or discrete distribution.
- the predefined time domain location includes one or more time domain time points, and the time domain time point is measured by the first time domain measurement unit, and the one or more time domain time points are Continuous or discrete distribution over time.
- the first resource allocation in a predefined set Go to a subset of random access channel resources.
- the elements in the predefined set are one or more sorted first resources.
- the ordering rule of the first resource is configured by a system.
- the random access channel resources are multiplexed by the code division multiplexing between the random access channel resource subsets:
- a subset of random access channel resources is constructed from at least one predefined set of random access sequences.
- the predefined set of random access sequences includes one or more random access sequences.
- the random access channel resource subset supports one type or multiple types of the second node to send a random access sequence.
- the second node is classified according to one of the following principles:
- the coverage enhancement level that the second node needs to support is the coverage enhancement level that the second node needs to support.
- PBCH physical broadcast channel
- the number of repetitions of the message When the second node successfully decodes the main information block ( ⁇ ) message, the number of repetitions of the message, the number of repetitions of the SIB message when the second node successfully decodes the system information block (SIB) message, and the MIB message when the second node successfully decodes the PBCH The number of repetitions.
- the second node is one or more terminals, or one or more terminal groups.
- the first node is at least one of the following:
- Macrocell Microcell, Picocell, Femtocell, LPN, Relay, Small Cell.
- the method further includes:
- the second node determines, according to the random access channel configuration information, a corresponding random access channel resource, and uses the random access channel resource to send random access signaling to the first node.
- the second node determines, according to the random access channel configuration information, a corresponding random access channel resource, and uses the random access channel resource to send random access signaling to the first node. , Also includes:
- the first node sends random access response signaling to the second node in response to the random access signaling sent by the second node.
- the random access response signaling carries random access response information of one or more of the second nodes.
- the one or more second nodes are configured by the system or configured by the first node.
- the one or more second nodes have any one or any of the following attributes: the one or more of the second nodes belong to the same type.
- the one or more of the second nodes need to support the same coverage enhancement level, and the one or more second nodes need to support the random access sequence to send the same number of repetitions.
- the one or more of the second nodes calculate the same RA-RNTI.
- the type of the one or more of the second nodes is configured by a system
- the coverage enhancement level that the one or more of the second nodes needs to support is configured by the system; the number of repetitions of the random access sequence transmission that the one or more of the second nodes need to support is configured by the system.
- the number of times the random access response signaling is repeatedly sent is indicated by the first node.
- the first node indicates the number of times the random access response signaling is repeatedly sent in a manner of at least one of the following:
- the maximum number of repetitions supported by the MIB information sent by the first node is in a mapping relationship with the number of times the random access response signaling is repeatedly sent.
- the maximum number of repetitions supported by the SIB information sent by the first node is in a mapping relationship with the number of times the random access response signaling is repeatedly sent.
- the information about the number of repetitions supported by the MIB is in a mapping relationship with the number of times the random access response signaling is repeatedly sent;
- the number information of the random access response signaling repeated transmission is indicated by the type of the second node or the coverage enhancement level or the number of repetitions of the supported random access sequence.
- the present invention also provides a random access channel resource configuration system, including a first node and a second node;
- the first node is configured to: send random access channel resource configuration information to the second node, where the random access channel resource configuration information includes one or more random access channel configuration information indications.
- the second node is one or more terminals, or one or more terminal groups.
- the first node is at least one of the following:
- the second node is configured to: determine, according to the random access channel configuration information, a corresponding random access channel resource, and send the random access message to the first node by using the random access channel resource. Order
- the first node is further configured to: send random access response signaling to the second node, to respond to the random access signaling sent by the second node.
- An embodiment of the present invention provides a method and system for configuring a random access channel resource, where a first node sends random access channel resource configuration information to a second node, where the random access channel resource configuration information includes one or more random access channels.
- the configuration information indicates that the second node sends the random access channel resource of the random access signaling, and implements the random access channel resource configuration for the MTC UE in the LTE/LTE-A system, and solves the LTE/LTE-A system.
- FIG. 1 is a schematic diagram of random access channel resource configuration information in a random access channel resource configuration method according to Embodiment 1 of the present invention
- FIG. 2 is a schematic diagram of a PRACH starting resource sequencing principle according to Embodiment 1 of the present invention
- FIG. 3 is a schematic diagram of PRACH resources occupied by each subset in Embodiment 2 of the present invention
- FIG. 4 is a different type of Embodiment 3 of the present invention.
- 5 is a schematic diagram of random access channel resource configuration information in a random access channel resource configuration method according to Embodiment 5 of the present invention
- FIG. 6 is a schematic diagram of random access channel resource configuration information in a random access channel resource configuration method according to Embodiment 6 of the present invention.
- FIG. 7 is a schematic diagram of random access channel resource configuration information in a random access channel resource configuration method according to Embodiment 7 of the present invention.
- FIG. 8 is a schematic diagram showing a distribution of initial resources of a PRACH in one frame according to Embodiment 8 of the present invention.
- FIG. 9 is a schematic diagram of random access channel resource configuration information in a random access channel resource configuration method according to Embodiment 10 of the present invention.
- FIG. 10 is a schematic diagram of PRACH initial resource allocation allocated in multiple frames in Embodiment 11 of the present invention.
- FIG. 11 is a schematic diagram of random access channel resource configuration information in a random access channel resource configuration method according to Embodiment 12 of the present invention.
- FIG. 12 is a schematic diagram of PRACH resource configuration in Frame 0 according to Embodiment 12 of the present invention
- FIG. 13 is a schematic diagram of PRACH resource configuration in each Frame according to Embodiment 13 of the present invention
- FIG. 14 is a thirteenth embodiment of the present invention. Schematic diagram of PRACH resource configuration in Frame 0.
- An embodiment of the present invention provides a method for configuring a random access channel resource, where a first node sends random access channel resource configuration information to a second node, and the random access channel resource configuration information is configured by one or more random access channels. Information indication.
- the random access channel configuration information includes at least configuration information of the first resource, where the first resource is one of the following:
- a resource allocated to the second node for transmitting random access signaling A starting resource allocated for the second node to send random access signaling.
- the first resource is a PRACH resource or a PRACH starting resource is taken as an example for description.
- Embodiment 1 of the present invention is a diagrammatic representation of Embodiment 1 of the present invention.
- An embodiment of the present invention provides a method for configuring a random access channel resource, including:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least a prach-Confi g Index.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. . In the embodiment of the present invention, it is assumed that the predefined time domain length is 1 frame, and the second node obtains the time domain occupied subframe in which the PRACH starting resource is within one frame by decoding the prach-ConfigInfo information sent by the first node. 0, 2, 4, 6, 8, and a total of 5 PRACH starting resources, as shown in Figure 1;
- the second node may be one or more terminals or one or more terminal groups; where prach-FreqOffset is used to indicate frequency domain offset information of the PRACH starting resource described by prach-Configlndex in the frequency domain.
- the PRACH starting resources allocated in multiple frames are sorted.
- the PRACH starting resource index in Frame k is RA (0) ⁇ RA (4), and in Frame k+1.
- the PRACH starting resource index is RA (5) ⁇ RA (9), and so on, and constitutes a PRACH starting resource set PRACHSet.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- each subset may support one or more types of second nodes to send random access sequences
- the second node may be classified according to one of the following principles:
- the number of repetitions of the PBCH channel used when the second node successfully decodes the PBCH is allocated according to the number of repetitions of the random access sequence that the second node needs to support.
- the second node is divided into two types (Type-1 and Type-2) according to different coverage enhancement levels that need to be supported, and the PRACHSet is divided into two sets of subsets (subset 1 and subset). 2), the PRACH starting resource index occupied by each set of subsets is configured by the system or sent by the first node.
- Each set of subsets supports a class of said second node to transmit a random access sequence, for example, a second node of Type-1 transmits a random access sequence on subset 1, and a second node of Type-2 transmits a random number on subset 2 Access sequence.
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the interval of the time domain location of the PRACH starting resource in the subset i; b s is the PRACH starting resource index offset in the subset i;
- Subset _i is the PRACH starting resource index of the thousand set i.
- the index of the occupied initial resource may be obtained as follows:
- Type_ _ rt is the starting resource index occupied when the second access node ( Type — ) of the i-th class transmits a random access sequence.
- the first type of second node (Type-1) PRACH starting resource index is RA (0), RA (2), RA (4), ..., and assumes that the random access is sent.
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity.
- the different values of the prach-Configlndex have a mapping relationship with the location information of the PRACH starting resource within the predefined time domain length and the number of the PRACH starting resources within the predefined time domain length, as shown in Table 1.
- "PreambleFormat” indicates the random access sequence format
- System frame number indicates the system frame number (Even indicates an even frame, Any indicates all frames)
- “Subframe number” indicates a subframe number.
- prach-ConfigIndex 12
- System frame number: "Any” indicates the start PRACH resources present in any frame
- there are five PRACH starting resources in a frame as shown in FIG. 1 .
- the second node may be one or more terminals or one or more terminal groups.
- the prach-FreqOffset is used to indicate the frequency domain offset information of the PRACH starting resource described by prach-Configlndex in the frequency domain.
- the PRACH starting resources allocated in multiple frames are sorted.
- the PRACH starting resource index in Frame k is RA (0) ⁇ RA (4), and in Frame k+1.
- the PRACH starting resource index is RA (5) ⁇ RA (9), and so on, and constitutes a PRACH starting resource set PRACHSet.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- each subset may support one or more types of second nodes to send random access sequences
- the second node may be classified according to one of the following principles:
- the second node sends the weight according to the random access sequence that needs to be supported.
- the number of complex times is divided into two categories (Type-1 and Type-2), and the PRACHSet is divided into two sets of subsets (subset 1 and subset 2), and the PRACH starting resource index occupied by each set of subsets is configured by the system. Or sent by the first node.
- Each set of subsets supports a class of said second node to transmit a random access sequence, for example, a second node of Type-1 transmits a random access sequence on subset 1, and a second node of Type-2 transmits a random number on subset 2 Access sequence.
- the random access sequence sent by the second node of Type-1 occupies 2 subframes, and the random access sequence sent by the second node of Type-2 occupies 4 subframes;
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the PRACH starting resource index occupied by the subset 1 is RA (0) ⁇ RA (3), RA (10) ⁇ RA (13), RA (20) ⁇ RA (23), ...
- the PRACH starting resource index occupied by the subset 2 is RA (4) ⁇ RA (9), RA (14) ⁇ RA (19), RA (24) - RA (29), ..., as shown in Fig. 3. Show.
- the index of the occupied initial resource may be obtained as follows:
- the second node of Type-1 sends the PRACH starting resource index occupied by the random access sequence on the subset 1 from RA (0) ⁇ RA (3), RA (10) ⁇ RA (13 ) , RA ( 20 ) ⁇ RA ( 23 ) , ... select; the second node of Type_2 sends random on subset 2
- RA 14), RA (16), RA (18), RA (24), RA (26), RA (28), ... are selected.
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries a random connection of one or more of the second nodes.
- Incoming response information the type of the second node that can carry the random access response information in the same random access response signaling is configured by the system or sent by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the type of the foregoing second node may be changed according to the environment in which the UE is located, and is not fixed after the setting.
- the concept of the type in the embodiment of the present invention is a concept similar to the set, when the corresponding division is satisfied.
- the second node belongs to the corresponding type.
- the embodiment of the present invention provides a method for configuring a random access channel resource, and the process for completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. .
- the predefined time domain length is 1 frame
- the prach-Configlndex information is configured by default, for example, the time domain of the PRACH starting resource in one frame is occupied by subframe 0, 2 4, 6, 8, and a total of 5 PRACH starting resources, as shown in FIG. 1; further, the second node may be one or more terminals or one or more terminal groups.
- the prach-FreqOffset is used to indicate the frequency domain offset information of the PRACH starting resource in the frequency domain described by the prach-Configlndex.
- prach-FreqOffset 7, that is, the first PRB index that describes the PRACH starting resource occupied in the frequency domain of one frame is PRB Index7, as shown in FIG.
- the PRACH starting resources allocated in multiple frames are sorted. As shown in FIG. 2, the PRACH starting resource index in Frame k is RA (0) ⁇ RA (4), and in Frame k+1. The PRACH starting resource index is RA ( 5 ) ⁇ RA ( 9 ), and so on.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- the Two nodes can be classified according to one of the following principles:
- the classification is performed according to different coverage enhancement levels that the second node needs to support; the allocation is performed according to the number of repetitions of the random access sequence that the second node needs to support; and the number of repetitions of the used PBCH channel is accumulated when the second node successfully decodes the PBCH.
- the second node when the PBCH is successfully decoded by the second node, the number of repetitions of the accumulated PBCH channel is different, and the second node is divided into four types (Type-1, Type-2, Type-3, Type 4), and dividing the random access channel resource into 2 sets of subsets (subset 1 and subset 2), and the PRACH starting resource index occupied by each set of subsets is configured by the system or sent by the first node.
- Each subset of the subset supports two types of the second node to send a random access sequence, for example, the second node of Type-1, Type-2 sends a random access sequence on the subset 1, and the second type of Type-3, Type-4 The node sends a random access sequence on subset 2.
- the random access sequence sent by the second node of Type-1 occupies 2 subframes, and the random access sequence sent by the second node of Type-2 occupies 6 subframes; the second node of Type-3 sends The random access sequence occupies 4 subframes, and the random access sequence sent by the second node of Type-4 occupies 8 subframes.
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the PRACH starting resource index occupied by the subset 1 is RA ( 0 ) ⁇ RA
- the PRACH starting resource index occupied by subset 2 is RA (4) ⁇ RA (9), RA (14) ⁇ RA (19), RA (24) ⁇ RA (29), as shown in Figure 3.
- the index of the occupied initial resource may be obtained as follows:
- the second node of Type-1 selects the PRACH starting resource index occupied by the random access sequence on the subset 1 as RA (0), RA (10), RA (20), ...;
- the second node of Type-2 sends the PRACH starting resource index occupied by the random access sequence on the subset 1 and can be selected from RA (1), RA (11), RA (21), ...; the second node of Type_3
- RA 14
- RA 24
- ... the second node of Type_4 is selected in the transmission of the subset 2, as shown in Fig. 4.
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node;
- the random access response signaling carries a random connection of one or more of the second nodes.
- Incoming response information the type of the second node that can carry the random access response information in the same random access response signaling is configured by the system or sent by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. . In the embodiment of the present invention, it is assumed that the predefined time domain length is 1 frame, and the second node obtains the time domain occupied subframe in which the PRACH starting resource is within one frame by decoding the prach-ConfigInfo information sent by the first node. 0, 2, 4, 6, 8, and a total of 5 PRACH starting resources, as shown in Figure 1.
- the second node may be one or more terminals or one or more terminal groups.
- the prach-FreqOffset is used to indicate the frequency domain offset information of the PRACH starting resource in the frequency domain described by the prach-Configlndex.
- prach-Freq0ffset 7, that is, description
- the first PRB index occupied by the PRACH starting resource in the frequency domain of one frame is PRB Index7, as shown in FIG.
- the PRACH starting resources allocated in multiple frames are sorted. As shown in FIG. 2, the PRACH starting resource index in Frame k is RA (0) ⁇ RA (4), and in Frame k+1. The PRACH starting resource index is RA ( 5 ) ⁇ RA ( 9 ), and so on.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- each set of subsets may support one or more types of second nodes to send a random access sequence
- the second node may be classified according to one of the following principles:
- the second node When the second node successfully decodes the message of the main information block (MIB), the number of repetitions of the MIB message is different;
- SIB System Information Block
- the second node classifies the number of repetitions of the MIB message according to the success of decoding the message of the main information block (MIB), for example, classifying into four types (Type-1, Type-2) , Type-3, Type-4), and dividing the random access channel resource into two sets of subsets (subset 1 and subset 2), and the PRACH starting resource index occupied by each set of subsets is configured by the system or by the first The node sends.
- Each set of subsets supports two types of said second nodes to send random access sequences, for example, the second node of Type-1, Type-2 sends random access on subset 1.
- the second node of the sequence, Type-3, Type-4 transmits a random access sequence on the subset 2.
- the two types of second nodes allocating the same subset use different random access sequence indexes;
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low power nodes (LPNs), relays, and small cells.
- LPNs low power nodes
- Subset _ i ⁇ RAIdx
- mod (RAIdx, Merval Suhset , ) b SuhsetJ , 0 ⁇ ubset ⁇ ⁇ Interval Subset i - ⁇ )
- RAIdx is the PRACH starting resource index, and the values are RA ( 0 ) , RA ( 1 ) ,
- Interval is the interval of the time domain location of the PRACH starting resource in the subset i;
- Subset _i is the PRACH starting resource index of the subset i;
- the index of the occupied initial resource may be obtained as follows:
- RAIdx is the index after reordering the PRACH starting resource index of each subset, and the value is RA' ( 0 ) , RA' ( 1 ) , ...;
- RACHI e pTim e / the number of PRACH starting resources included in the resources occupied by the random access signaling sent by the second node ( Typej ) of the jth class;
- Type j _3 ⁇ 4 ⁇ city te is the starting resource index occupied when the random access sequence is sent by the second node ( Typej ) of the jth class.
- the PRACH starting resource indexes of the Type-1 and Type-2 second nodes are RA (0), RA (2), RA (4), ..., and assume that the Type-1 transmission is random.
- the access sequence time domain is 2 subframes.
- the random resource access sequence index is RA' (0), RA' ( 2) , RA' (4), ie index RA (0) , RA
- the PRACH starting resource indexes of the Type-3 and Type-4 second nodes are RA (1), RA(3), RA(5), ..., and assume that the Type-3 sends random
- the access sequence has a time domain length of 2 subframes.
- the index of the starting resource when entering the sequence is RA' (0), RA' (1), RA' (2), ie index RA (1), RA (3), RA (5), ...;
- Type_4 sent random
- the index of the starting resource when accessing the sequence is RA' (0), RA' (2), RA' (4), ..., ie index RA (1) , RA
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. . In the embodiment of the present invention, it is assumed that the predefined time domain length is 1 frame, and the second node obtains the time domain occupied subframe in which the PRACH starting resource is within one frame by decoding the prach-ConfigInfo information sent by the first node. 2, 4, and a total of 4 PRACH starting resources, as shown in Figure 5.
- the prach-FreqOffset is used to indicate the first PRB index occupied by the PRACH starting resource described by prach-Configlndex in the frequency domain.
- the second node may be one or more terminals or one or more terminal groups.
- the starting resource of each PRACH is obtained by calculating the minimum PRB index ⁇ 7 TM in the frequency domain according to the following formula:
- the schematic diagram of the initial resource distribution of PRACH in subframe2 and subframe4 is shown in FIG. 5.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- each set of subsets may support one or more types of second nodes to send a random access sequence
- the second node may be classified according to one of the following principles:
- the second node When the second node successfully decodes the information information of the main information block (MIB), the number of repetitions of the MIB message is different;
- SIB System Information Block
- the number of repetitions of the MIB message is classified.
- the second node classifies according to the number of repetitions of the SIB message when the system information block (SIB) message is successfully decoded. For example, it is divided into two categories (Type-1 and Type-2), and the random access channel resource is divided into two sets of subsets (subset 1 and subset 2), and the PRACH starting resource index occupied by each set of subsets is Configured by the system or sent by the first node.
- Each set of subsets supports a class of said second node to transmit a random access sequence, for example, a second node of Type-1 transmits a random access sequence on subset 1, and a second node of Type-2 transmits a random number on subset 2 Access sequence.
- the first node shown is one of the following
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the index of the occupied initial resource may be obtained as follows:
- the PRACH starting resource indexes assigned by each type of second node are reordered, and then determined according to the following formula:
- RAIdx is the index after reordering the PRACH starting resource index in each subset, and the value is RA' (0) RA' ( 1 ) , ...;
- Number - (i Type) resources of the random access signaling comprises occupancy of the initial PRACH resource class RACHKepTime ⁇ 1 second node;
- Type_ _ rt is the starting resource index occupied when the second access node ( Type — ) of the i-th class transmits a random access sequence.
- the second node sends random access signaling on the allocated random access resources; (5) after the first node receives the random access signaling sent by the second node, the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. . In the embodiment of the present invention, it is assumed that the predefined time domain length is 1 frame, and the second node obtains the information of the prach-Configlndex sent by the first node, and learns that the PRACH starting resource is within one frame or occupied. Subframe 0, 2, 4, 6, 8, as shown in Figure 6; The prach-FreqOffset is used to indicate the first PRB index occupied by the PRACH starting resource described by the prach-Configlndex in the frequency domain;
- the second node may be one or more terminals or one or more terminal groups.
- the initial resource of each PRACH is calculated in the frequency domain by the minimum PRB index ⁇ 7 TM according to the following formula: obtain:
- the random access channel configuration information may be configured in at least one of the following: a System Information Block (SIB);
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- each set of subsets may support one or more types of second nodes to send a random access sequence
- the second node may be classified according to one of the following principles:
- the second node When the second node successfully decodes the message of the main information block (MIB), the number of repetitions of the MIB message is different;
- the system information block (SIB) is successfully decoded.
- SIB system information block
- the number of repetitions of the MIB message is classified.
- the second node classifies the number of repetitions of the MIB message according to the number of repetitions of the MIB message when the PBCH is successfully decoded. For example, it is divided into two categories (Type-1 and Type-2), and the random access channel resource is divided into two sets of subsets (subset 1 and subset 2), and the index occupied by each subset is configured by the system or Sent by the first node.
- Each set of subsets supports a class of said second node to send a random access sequence, for example, a second node of Type-1 transmits a random access sequence on subset 1, and a second node of Type-2 transmits a random number on subset 2. Access sequence.
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the index of the occupied initial resource may be obtained as follows:
- the PRACH starting resources allocated by each type of second node are reordered and then determined according to the following formula:
- RAIdx is the index of the PRACH starting resource reordered by the second node of Type_i, and the value is RA. , ( 0 ) , RA' ( 1 ) , RA' ( 2 ) ,
- Number - (i Type) resources of the random access signaling comprises occupancy of the initial PRACH resource class RACHKepTime ⁇ 1 second node;
- Type_ _ rt is the starting resource index occupied when the second access node ( Type — ) of the i-th class transmits a random access sequence.
- the first type of second node (Type-1) PRACH starting resource index is RA' (0), RA' (1), RA' (2), ..., and 4
- the index of the starting resource is RA, (0), RA' (2), RA' (4), ....
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by a random access channel configuration information
- the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. .
- the predefined time domain length is 1 frame
- the second node obtains the time domain occupied subframe in which the PRACH starting resource is within one frame by decoding the prach-ConfigInfo information sent by the first node. 2, 4, and each subframe has two PRACH starting resource starting positions, as shown in Figure 7.
- the prach-FreqOffset is used to indicate the first PRB index occupied by the PRACH starting resource described by prach-Configlndex in the frequency domain.
- the second node may be one or more terminals or one or more terminal groups.
- the starting resource of each PRACH is obtained by calculating the minimum PRB index ⁇ 7 TM in the frequency domain according to the following formula:
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- the number of repetitions of the PBCH channel used when the second node successfully decodes the PBCH is allocated according to the number of repetitions of the random access sequence that the second node needs to support.
- the second node is divided into two types (Type-1 and Type-2) according to different coverage enhancement levels that need to be supported, and the random access channel resources are divided into two sets of subsets.
- Set 1 and subset 2 each set of subsets supports a class of said second node to send a random access sequence, for example, a second node of Type-1 transmits a random access sequence on subset 1, and a second node of Type-2 A random access sequence is transmitted on subset 2.
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the index of the occupied initial resource may be obtained as follows:
- RAIdx is the index after the PRACH starting resource is reordered, and the value is RA' ( 0 ), RA' ( 1 ), RA' ( 2 ) , ...;
- Number - (i Type) resources of the random access signaling comprises occupancy of the initial PRACH resource class RACHKepTime ⁇ 1 second node;
- Type_ _ rt is the starting resource index occupied when the second access node ( Type — ) of the i-th class transmits a random access sequence.
- the first type of second node (Type-1) PRACH starting resource index is RA' (0), RA' (1), RA' (2), ..., and 4
- the index of the resource is RA, (0), RA' (1), RA' (2), ....
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but need to be pre-processed by the system. Defining a type of a second node that can send random access response information in the same random access response signaling, and UE1 and UE2 belong to the type.
- the minimum PRB index of the starting resource of each PRACH in the frequency domain can also be calculated according to the following formula:
- ⁇ RB offiet is described by prach-FreqOffset, for example.
- ⁇ ? 3 ⁇ 4 ⁇ offiet is the interval of the starting resources of different PRACHs in the frequency domain position, and is signaled by the random access channel configuration signaling.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by multiple sets of random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the random access channel resource configuration information is indicated by two sets of random access channel configuration information.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. .
- the prach-FreqOffset is used to indicate the frequency domain offset information of the PRACH starting resource described by prach-Configlndex in the frequency domain.
- the predefined time domain length is 1 Frame;
- the prach-Configlndex1 information indicates that the PRACH starting resource is within one frame or occupyes subframe 2 and subframe 4, and prach-FreqOffset1 describes that the PRACH starting resource is occupied in a frequency domain of one frame.
- the first PRB index is PRB Index7;
- the second set of PRACH configuration information indicates that the prach-ConfigIndex2 information indicates that the PRACH starting resource is within one frame or that the subframe 2 and the subframe 4 are occupied, and the prach-FreqOffset2 describes that the PRACH starting resource is occupied in the frequency domain of one frame.
- the first PRB index is PRB Index37.
- the schematic diagram of the initial resource distribution of the PRACH in one frame is shown in FIG. 8.
- the initial resources RA (0) and RA (1) of the PRACH are indicated by prach-Configlndexl and prach-FreqOffsetl;
- the initial resource RA of the PRACH (2) And RA ( 3 ) are indicated by prach-ConfigIndex2 and prach-FreqOffset2;
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- each set of subsets may support one or more types of second nodes to send a random access sequence
- the second node may be classified according to one of the following principles:
- the classification is performed according to the number of repetitions of the random access sequence that the second node needs to support; when the second node successfully decodes the PBCH (Physical Broadcast Channel), The number of repetitions of the PBCH channel used.
- the second node is divided into two types (Type-1 and Type-2) according to different coverage enhancement levels that need to be supported, and the random access channel resources are divided into two sets of subsets. Set 1 and subset 2), .
- Each set of subsets supports a class of said second node transmitting a random access sequence J
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the index of the starting resource of the PRACH in the subset 1 is RA(0) and RA(1) in each frame; the index of the starting resource of the PRACH in the subset 2 is each frame.
- RA (2) and RA (3) are each frame.
- the index of the occupied initial resource may be obtained as follows:
- the PRACH starting resource indexes assigned by each type of second node are reordered, and then determined according to the following formula:
- RAIdx is the index of the PRACH starting resource reordered for each type of second node, and the value is RA' ( 0 ) , RA' ( 1 ) ,
- Number - (i Type) resources of the random access signaling comprises occupancy of the initial PRACH resource class RACHKe pTime ⁇ 1 second node;
- Type _ _ rt is the starting resource index occupied by the second node ( Type —) of the i-th class when transmitting the random access sequence.
- the second node sends random access signaling on the allocated random access resources; (5) after the first node receives the random access signaling sent by the second node, the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by multiple sets of random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the random access channel resource configuration information is indicated by two sets of random access channel configuration information.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. . In the embodiment of the present invention, it is assumed that the predefined time domain length is 1 Frame.
- the prach-Configlndex1 information indicates that the PRACH starting resource is within one frame or occupyes subframe 2 and subframe 4, and prach-FreqOffset1 describes that the PRACH starting resource is occupied in a frequency domain of one frame.
- the first PRB index is PRB Index7;
- the second set of PRACH configuration information indicates that the prach-Confi g Index 2 information indicates that the PRACH starting resource is within one frame or occupyes subframe 2 and subframe 4, and prach-FreqOffset2 describes that the PRACH starting resource is within one frame frequency domain.
- the first PRB index occupied is PRB Index37.
- the schematic diagram of the initial resource distribution of the PRACH in one frame is shown in FIG. 8.
- the initial resources RA (0) and RA (1) of the PRACH are indicated by prach-Configlndexl and prach-FreqOffsetl; the initial resource RA of the PRACH (2) ) and RA ( 3 ) are indicated by prach-ConfigIndex2 and prach-FreqOffset2.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- each set of subsets may support one or more types of second nodes to send a random access sequence
- the second node may be classified according to one of the following principles:
- the number of repetitions of the PBCH channel used when the second node successfully decodes the PBCH is allocated according to the number of repetitions of the random access sequence that the second node needs to support.
- the second node is divided into two types (Type-1 and Type-2) according to different coverage enhancement levels that need to be supported, and the random access channel resources are divided into two sets of subsets.
- Set 1 and subset 2 the starting resource index of the PRACH occupied by each set of subsets is configured by the system or sent by the first node.
- Each set of subsets supports a class of said second node to send a random access sequence, for example, a second node of Type-1 transmits a random access sequence on subset 1, and a second node of Type-2 A random access sequence is transmitted on subset 2.
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the index of the starting resource of the PRACH in the subset 1 is RA(0) and RA(3) in each frame; the index of the starting resource of the PRACH in the subset 2 is each frame.
- RA (2) and RA (1) are each frame.
- the index of the occupied initial resource may be obtained as follows:
- the PRACH starting resource indexes assigned by each type of second node are reordered, and then determined according to the following formula:
- RAIdx is the index of the PRACH starting resource reordered for each type of second node, and the value is RA' ( 0 ) , RA' ( 1 ) ,
- Number - (i Type) resources of the random access signaling comprises occupancy of the initial PRACH resource class RACHKepTime ⁇ 1 second node;
- Type_ _ rt is the starting resource index occupied when the second access node ( Type — ) of the i-th class transmits a random access sequence.
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, For example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type, that is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same. Or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the invention provides a random access channel resource configuration, and uses the method to complete the MTC.
- the process of UE access is as follows, including:
- the uplink and downlink subframe configuration type selected by the TDD-LTE system is 4, that is, the frame structure of the system is as shown in FIG. It is shown that subframeO, subframe4 ⁇ frame9 are descendants, subframel is a special subframe, and subframe2 and subframe3 are uplink subframes.
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least rach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. .
- the subframe 2 and the subframe 3 are uplink subframes, and the predefined time domain length is 1 frame, and the second node learns the PRACH starting resource by decoding the prach-ConfigInfo information sent by the first node.
- the time domain in one frame occupies the subframes 2, 3, and has a total of 4 PRACH starting resources, as shown in FIG.
- the prach-FreqOffset is used to indicate the first PRB index occupied by the PRACH starting resource described by the prach-Configlndex in the frequency domain.
- the second node may be one or more terminals or one or more terminal groups.
- the minimum PRB index of the starting resource of each PRACH in the frequency domain is calculated according to the following formula:
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- the Two nodes can be classified according to one of the following principles:
- the number of repetitions of the PBCH channel used when the second node successfully decodes the PBCH is allocated according to the number of repetitions of the random access sequence that the second node needs to support.
- the second node is divided into two types (Type-1 and Type-2) according to different coverage enhancement levels that need to be supported, and the random access channel resources are divided into two sets of subsets.
- Set 1 and subset 2 the PRACH start resource index occupied by each set of subsets is configured by the system or sent by the first node.
- Each set of subsets supports a class of said second node to transmit a random access sequence, for example, a second node of Type-1 transmits a random access sequence on subset 1, and a second node of Type-2 transmits a random number on subset 2 Access sequence.
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the index of the occupied initial resource may be obtained as follows:
- the PRACH starting resource indexes assigned by each type of second node are reordered, and then determined according to the following formula:
- RAIdx is the index after reordering the PRACH starting resource index in each subset, and the value is RA' ( 0 ) RA' (1), ...
- R ⁇ H ⁇ PTime ⁇ is the number of PRACH starting resources included in the resources occupied by the random access signaling sent by the second node (Type-1) of the i-th class;
- Type_ _ rt is the starting resource index occupied when the second access node ( Type — ) of the i-th class transmits a random access sequence.
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. Different values of prach-Configlndex The location information of the PRACH starting resource within the predefined time domain length and the number of the starting resources of the PRACH within the predefined time domain length have a mapping relationship, which is configured by the system. In the embodiment of the present invention, it is assumed that the predefined time domain length is 1 frame, and the second node obtains the time domain occupied subframe in which the PRACH starting resource is within one frame by decoding the prach-ConfigInfo information sent by the first node. O, 2, 4, 6, 8, and a total of 5 PRACH starting resources, as shown in Figure 1.
- the second node may be one or more terminals or one or more terminal groups.
- the prach-FreqOffset is used to indicate the frequency domain offset information of the PRACH starting resource described by prach-Configlndex in the frequency domain.
- prach-Freq0ffset 7, that is, description
- the first PRB index occupied by the RA PRACH starting resource in the frequency domain of Frame k is determined according to the following formula: ,
- ⁇ RB offiet is described by prach-FreqOffset, for example.
- k is the Frame index number.
- FIG. 10 a schematic diagram of a PRACH starting resource allocation allocated in multiple frames is shown in FIG. 10, and the PRACH starting resources allocated in multiple frames are reordered, and the PRACH starting resource index in the frame k is RA. (0) ⁇ RA (4), the PRACH starting resource index in Frame k+1 is RA (5) ⁇ RA (9), and so on.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a physical broadcast channel (Physical Broadcast Channel, PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- the Two nodes can be classified according to one of the following principles:
- the number of repetitions of the PBCH channel used when the second node successfully decodes the PBCH is allocated according to the number of repetitions of the random access sequence that the second node needs to support.
- the second node is divided into two types (Type-1, Type-2) according to different coverage enhancement levels that need to be supported, and the random access channel resources are divided into two sets of subsets (sub-subsets).
- Set 1 and subset 2) the PRACH start resource index occupied by each set of subsets is configured by the system or sent by the first node.
- Each set of subsets supports a class of said second node to transmit a random access sequence, for example, a second node of Type-1 transmits a random access sequence on subset 1, and a second node of Type-2 transmits a random number on subset 2 Access sequence.
- the random access sequence sent by the second node of Type-1 occupies 8 subframes, and the random access sequence sent by the second node of Type-2 occupies 12 subframes; wherein, the first node is One of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- the PRACH starting resource indexes occupied by the subset 1 are RA ( 0 ) ⁇ RA ( 1 ) , RA ( 5 ) ⁇ RA ( 6 ) , RA ( 10 ) ⁇ RA ( 11 ) , RA ( 15 ) ⁇ RA ( 16 ) , ...
- the PRACH starting resource index occupied by subset 2 is RA ( 2 ) ⁇ RA ( 4 ) , RA ( 7 ) ⁇ RA ( 9 ) , RA ( 12 ) - RA ( 14 ) ), RA (17) ⁇ RA (19) ⁇ is shown in Figure 10.
- the index of the occupied initial resource may be obtained in the following manner:
- the second node of Type-1 is sent on the subset 1.
- the PRACH starting resource index occupied by the random access sequence is selected from RA (0), RA (10), RA (20), ...;
- the PRACH starting resource index occupied by the second node of Type-2 transmitting the random access sequence on the subset 1 may be selected from RA (1), RA (11), RA (21), ....
- the second node sends random access signaling on the allocated random access resources
- the first node sends a random access response signaling to the second node, in response to the The random access signaling sent by the second node.
- the random access response signaling carries one or more random access response information of the second node; the type of the second node that can carry the random access response information in the same random access response signaling Distributed by the system or by the first node to the second node.
- the random access response signaling carries two second nodes, for example, UE1 (User Equipment 1) and UE2 (User Equipment 2), and UE1 and UE2 belong to the same type. That is, the coverage enhancement level of UE1 and UE2 is the same or the number of repetitions of the random access sequence that UE1 and UE2 need to support is the same or the RA-RNTI calculated by UE1 and UE2 is the same.
- UE1 and UE2 may also belong to different types, but the type of the second node that can transmit random access response information in the same random access response signaling needs to be predefined by the system, and UE1 and UE2 belongs to the type.
- the embodiment of the invention provides a random access channel resource configuration, and uses the method to complete the MTC.
- the process of UE access is as follows, including:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The different values of prach-Configlndex and the location information of the starting resource of the PRACH within the predefined time domain length and the PRACH There is a mapping relationship between the number of resources in the predefined time domain length, which is configured by the system.
- prach-Configlndex is equivalent to the "PRACH Configuration Index" in Table 2, as shown in Table 2, according to the value of the PRACH Configuration Index, "PreambleFormat", "System frame number” and “Subframe number” can be known.
- PreambleFormat indicates a random access sequence format
- System frame number indicates a system frame number (Even indicates an even frame, Any indicates all frames)
- Subframe number indicates a subframe number.
- the PRACH starting resource is configured in the subframes of the present invention, which is the PRACH resource in the embodiment of the present invention.
- the minimum PRB index that the PRACH resource occupies in the frequency domain is PRB7. If the PRACH resource occupies 6 RPBs in the frequency domain, the PRB7 PRB12 in each Subframe is configured as a PRACH resource. , as shown in Figure 11.
- the LTE UE and the MTC UE are both present in the FDD-LTE system, and the PRACH resources used by the LTE UE and the MTC UE are not the same, and the PRACH resource in FIG. 11 is allocated to the MTC UE.
- the MTC UE is divided into an MTC UE (ie, a Normal MTC UE) that does not require coverage enhancement, and a Cover Improvement Improvement (TCC UE) that requires coverage enhancement.
- the Coverage Improvement MTC UE is further divided into multiple levels, which are divided into three levels in the embodiment of the present invention, namely Coverage Improvement Level 1, Coverage Improvement Level 2, and Coverage Improvement Level 3, and the principle of Go' J is At least one of the following:
- the number of repetitions sent according to the random access sequence that the Coverage Improvement MTC UE needs to support is divided into multiple levels;
- the Covered Improvement MTC UE When the Covered Improvement MTC UE successfully decodes the PBCH (Physical Broadcast Channel), the number of repetitions of the PBCH channel used is divided into multiple levels.
- PBCH Physical Broadcast Channel
- the PRACH resources RA ( 0 ) ⁇ RA ( 4 ) in Frame 0 are allocated to the Normal MTC UE; the RA ( 5 ) is assigned to the MTC UE of the Coverage Improvement Level 1; and the RA ( 6 ) ⁇ RA ( 7 ) is allocated.
- the MTC UE of the Coverage Improvement Level 2; RA (8) ⁇ RA (9) is assigned to the MTC UE of the Coverage Improvement Level 3, as shown in FIG. Frame 1, Frame 2, ... Frame k... allocate PRACH resources in the same way.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- Enhanced Physical Downlink Control Channel Enhanced Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- the index of the occupied initial resource can be obtained as follows:
- Each type of MTC UE (Normal MTC UE or Coverage Improvement Level 1)
- the PRACH starting resource index assigned by the MTC UE or the Coverage Improvement Level 2 MTC UE or the Coverage Improvement Level 3 MTC UE is reordered, and then determined according to the following formula:
- St rt is the PRACH starting resource index occupied when the random access sequence is sent by the i-type MTC UE.
- the MTC UE sends random access signaling on the allocated random access resource; (4) after the first node receives the random access signaling sent by the MTC UE, the first The node sends random access response signaling to the MTC UE, and is used to respond to the random access signaling sent by the MTC UE.
- the random access response signaling carries the random access response information of one or more of the MTC UEs; the type of the MTC UE that can carry the random access response information in the same random access response signaling by the system
- the configuration is sent by the first node to the MTC UE.
- the random access response signaling carries random access response information of two MTC UEs, for example, UE1 and UE2, and UE1 and UE2 belong to Coverage Improvement Level 2, and Coverage Improvement Level 2
- the number of repetitions of the corresponding random access response signaling is A, and the corresponding relationship is configured by the system. Then, when the first node sends the random access response signaling, the first node sends a repeated A transmission.
- the random access response signaling carries random access response information of two MTC UEs, for example, UE1 and UE2, and UE1 and UE2 belong to Coverage Improvement Level 2, and the random access
- the repetition number information of the incoming response signaling is directly indicated by the downlink control information, and is sent to the UE1 and the UE2 through the PDCCH or the ePDCCH;
- the random access response signaling carries random access response information of two MTC UEs, for example, UE1 and UE2, and the number of repeated transmissions of random access sequences supported by UE1 and UE2 is the same, for example
- the number of repetitions of the random access response signaling corresponding to C times of the random access sequence is C, and the corresponding relationship is configured by the system; except for the implementation of the present invention, UE1 and UE2 may also belong to For example, the UE1 belongs to the Coverage Improvement Level 2, and the UE2 belongs to the Coverage Improvement Level 3, and the number of repetitions of the random access response signaling corresponding to the Coverage Improvement Level 2 is A, and the Coverage Improvement Level 3 corresponds to the The number of repetitions of the random access response signaling is B, for example, B>A, and the random access response signaling is repeatedly transmitted B times;
- the number of repeated transmissions of the random access sequence supported by the UE1 and the UE2 is different.
- the number of repeated transmissions of the random access sequence supported by the UE1 is D
- the number of repeated transmissions of the random access sequence supported by the UE2 is F. Times.
- the number of repetitions of the random access response signaling corresponding to the random access sequence when the number of repeated transmissions is D is A
- the number of repetitions of the random access response signaling corresponding to the number of repeated transmissions of the random access sequence is F B, for example, B>A, the random access response signaling is repeated B times;
- the system configures the PBCH maximum number of repeated transmissions to G times, and
- the number of repetitions of the random access response signaling corresponding to the number of times of the maximum number of repeated transmissions of the PBCH is A, and the random access response signaling carries the random access response information of the two MTC UEs, for example, UE1 And UE2, the random access response signaling is repeated by A times;
- the system configures several repeated transmission times of the PBCH, for example, G1, G2, G3, and G4, respectively, and the number of repeated transmissions of the PBCH and the repeated transmission times of the random access response signaling exists one.
- Corresponding relationships, for example, G1, G2, G3, and G4 respectively correspond to the random access response signaling, and the number of repeated transmissions is Al, A2, A3, and A4.
- the random access response signaling carries the random access response information of the two MTC UEs, for example, UE1 and UE2, and when the UE1 and the UE2 decode the PBCH, the accumulated PBCH repetition times are respectively closest to G1 and G2;
- the random access response signaling is repeated by A2 times;
- the system configures several repeated transmission times of the PBCH, for example, G1, G2, G3, and G4, respectively, and the number of repeated transmissions of the PBCH and the repeated transmission times of the random access response signaling exists one.
- Corresponding relationships, for example, G1, G2, G3, and G4 respectively correspond to the random access response signaling, and the number of repeated transmissions is Al, A2, A3, and A4.
- the random access response signaling carries the random access response information of the two MTC UEs, for example, UE1 and UE2, and when the UE1 and the UE2 decode the PBCH, the accumulated PBCH repetition times are closest to G2;
- the random access response signaling is repeated by A2 times;
- the system configures the maximum number of repeated transmissions of the MIB to be G times, and the number of repetitions of the random access response signaling corresponding to the number of times of the maximum number of repeated transmissions of the MIB is G, assuming the random access response.
- the signaling carries the random access response information of the two MTC UEs, for example, UE1 and UE2, and the random access response signaling is repeatedly sent A times;
- the system configures the number of repeated transmissions of the MIB, for example, G1, G2, G3, and G4, respectively, and the number of repeated transmissions of the MIB and the number of repeated transmissions of the random access response signaling exists one.
- Corresponding relationships, for example, G1, G2, G3, and G4 respectively correspond to the random access response signaling, and the number of repeated transmissions is Al, A2, A3, and A4.
- the random access response signaling carries the random access response information of the two MTC UEs, for example, UE1 and UE2, and when the UE1 and the UE2 decode the MIB, the accumulated MIB repetition times are respectively closest to G1 and G2;
- the random access response signaling is repeated by A2 times;
- the system configures several repeated transmission times of the MIB, for example, respectively Gl, G2, G3, and G4, and there is a corresponding relationship between the number of repeated transmissions of the MIB and the number of repeated transmissions of the random access response signaling, for example, G1, G2, G3, and G4 respectively correspond to the random access response signal.
- the number of repeated transmissions is Al, A2, A3, and A4.
- the random access response signaling carries the random access response information of the two MTC UEs, for example, UE1 and UE2, and when the UE1 and the UE2 decode the MIB, the accumulated MIB repetition times are closest to G2;
- the random access response signaling is repeated by A2 times;
- the system configures the maximum number of repeated transmissions of the SIB to be G times, and the number of repetitions of the random access response signaling corresponding to the number of times of the maximum number of repeated transmissions of the SIB is A, assuming the random access response
- the signaling carries the random access response information of the two MTC UEs, for example, UE1 and UE2, and the random access response signaling is repeatedly sent A times;
- the system configures several repeated transmission times of the SIB, for example, G1, G2, G3, and G4, respectively, and the number of repeated transmissions of the foregoing SIB and the repeated transmission times of the random access response signaling exist one.
- Corresponding relationships, for example, G1, G2, G3, and G4 respectively correspond to the random access response signaling, and the number of repeated transmissions is Al, A2, A3, and A4.
- the random access response signaling carries the random access response information of the two MTC UEs, for example, UE1 and UE2, and when the UE1 and the UE2 decode the SIB, the accumulated SIB repetition times are respectively closest to G1 and G2;
- the random access response signaling is repeated by A2 times;
- the system configures several repeated transmission times of the SIB, for example, G1, G2, G3, and G4, respectively, and the number of repeated transmissions of the foregoing SIB and the repeated transmission times of the random access response signaling exist one.
- Corresponding relationships, for example, G1, G2, G3, and G4 respectively correspond to the random access response signaling, and the number of repeated transmissions is Al, A2, A3, and A4.
- the random access response signaling carries the random access response information of the two MTC UEs, for example, UE1 and UE2, and when the UE1 and the UE2 decode the SIB, the cumulative number of SIB repetitions is closest to G2;
- the random access response signaling is repeated by A2 times;
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- Embodiment 13 of the present invention is also called home base stations, low-power nodes (LPNs), relays, and small cells.
- the embodiment of the present invention provides a random access channel resource configuration, and the process of completing the MTC UE access by using the method is as follows:
- the random access channel resource configuration information is indicated by a random access channel configuration information, and the random access channel configuration information includes at least prach-Configlndex and prach-FreqOffset.
- the prach-Configlndex is used to describe the time domain location information of the PRACH starting resource (the time domain length is a subframe) allocated within a predefined time domain length and the starting resource of the PRACH within the predefined time domain length. Quantity. The difference between the value of the prach-Configlndex and the location information of the starting resource of the PRACH in the predefined time domain length and the number of the starting resource of the PRACH in the predefined time domain length are configured by the system. .
- prach-Configlndex is equivalent to the "PRACH Configuration Index" in Table 2. As shown in Table 2, “PreambleFormat” "System frame number” and “Subframe number” can be known according to the value of the PRACH Configuration Index. Among them, “PreambleFormat” indicates the random access sequence format; “System frame number” indicates the system frame number (Even indicates an even frame, Any indicates all frames); “Subframe number” indicates a subframe number.
- PreambleFormat 0 (The PRACH resource occupies only one Subframe in this format.)
- the PRACH start resource is configured in the Subframes 0 ⁇ 9 of each frame, which is also the PRACH resource in the embodiment of the present invention.
- RA PRB "PRB can be calculated from prach-FreqOffset
- k is the Frame index number
- the PRACH resource configuration in each frame is as shown in Figure 13.
- Frame0, Frame2, Frame4, ... occupy the frequency domain resources PRB7 ⁇ PRB 12; occupy the frequency domain resources PRB37 ⁇ PRB42 in Frame 1, Frame3, Frame5, ... .
- the LTE UE and the MTC UE are both present in the FDD-LTE system, and the PRACH resources used by the LTE UE and the MTC UE are not the same, and the PRACH resource in FIG. 13 is allocated to the MTC UE.
- the MTC UE is divided into an MTC UE (ie, a Normal MTC UE) that does not require coverage enhancement, and a Cover Improvement MTC UE that requires coverage enhancement.
- the Coverage Improvement MTC UE is further divided into multiple levels, which are divided into three levels in the embodiment of the present invention, namely Coverage Improvement Level 1, Coverage Improvement Level 2, and Coverage Improvement Level 3, and the principle of Go' J is At least one of the following:
- the number of repetitions sent according to the random access sequence that the Coverage Improvement MTC UE needs to support is divided into multiple levels;
- the Covered Improvement MTC UE When the Covered Improvement MTC UE successfully decodes the PBCH (Physical Broadcast Channel), the number of repetitions of the PBCH channel used is divided into multiple levels.
- PBCH Physical Broadcast Channel
- the PRACH resources RA ( 0 ) ⁇ RA ( 4 ) in Frame 0 are allocated to the Normal MTC UE; the RA ( 5 ) is assigned to the MTC UE of the Coverage Improvement Level 1; and the RA ( 6 ) ⁇ RA ( 7 ) is allocated.
- RA (8) ⁇ RA (9) is given to the MTC UE of Coverage Improvement Level 3, as shown in Figure 14.
- Frame 1, Frame 2, ... Frame k allocate PRACH resources in the same way.
- the random access channel configuration information may be configured in at least one of the following:
- SIB System Information Block
- MIB Master Information Block
- DCI Downlink Control Information
- the random access channel configuration information may be sent in at least one of the following: a Physical Broadcast Channel (PBCH);
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- the index of the occupied initial resource can be obtained as follows:
- the PRACH starting resource indexes assigned by each type of MTC UE are reordered, and then determined according to the following formula:
- RAGH RepTime the number of PRACH starting resources included in the resources occupied by the random access signaling sent by the i-th class MTC UE ;
- St rt is the PRACH starting resource index occupied when the random access sequence is sent by the i-type MTC UE.
- the MTC UE sends random access signaling on the allocated random access resources
- the first node After the first node receives the random access signaling sent by the MTC UE, the first node sends a random access response signaling to the MTC UE, and is configured to send in response to the MTC UE.
- the random access signaling After the first node receives the random access signaling sent by the MTC UE, the first node sends a random access response signaling to the MTC UE, and is configured to send in response to the MTC UE.
- the random access signaling After the first node receives the random access signaling sent by the MTC UE, the first node sends a random access response signaling to the MTC UE, and is configured to send in response to the MTC UE. The random access signaling.
- the random access response signaling carries a random connection of one or more of the MTC UEs.
- Incoming response information the type of the MTC UE that can carry the random access response information in the same random access response signaling is configured by the system or sent by the first node to the MTC UE.
- the random access response signaling carries random access response information of two MTC UEs, for example, UE1 and UE2, and UE1 and UE2 belong to Coverage Improvement Level 2.
- UE1 and UE2 may also belong to different Coverage Improvement Levels, but need to be predefined by the system.
- the first node shown is one of the following:
- Macrocells, Microcells, Picocells, Femtocells are also called home base stations, low-power nodes (LPNs), relays, and small cells.
- LPNs low-power nodes
- a random access channel resource configuration system includes a first node and a second node in the embodiment of the present invention
- the first node is configured to send random access channel resource configuration information to the second node, where the random access channel resource configuration information includes one or more random access channel configuration information indications.
- the second node is one or more terminals, or one or more terminal groups.
- the first node is at least one of the following:
- the second node is configured to determine a corresponding random access channel resource according to the random access channel configuration information, and send random access to the first node by using the random access channel resource.
- the first node is further configured to send random access response signaling to the second node, to respond to the random access signaling sent by the second node.
- the random access channel resource configuration system provided by the embodiment of the present invention can be combined with a random access channel resource configuration method provided by an embodiment of the present invention to complete the LTE/A-LTE system. Access to the MTC UE.
- all or part of the steps of the foregoing embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
- the invention is not limited to any particular combination of hardware and software.
- the various devices/function modules/functional units in the above embodiments may be implemented using a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
- Each device/function module/functional unit in the above embodiments can be stored in a computer readable storage medium when implemented in the form of a software function module and sold or used as a standalone product.
- the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
- the embodiment of the present invention provides a method and system for configuring a random access channel resource, where a first node sends random access channel resource configuration information to a second node, where the random access channel resource configuration information includes one or more random
- the access channel configuration information indicates that the second node sends the random access channel resource of the random access signaling, and implements the random access channel resource configuration for the MTC UE in the LTE/LTE-A system, and solves the LTE/LTE - The problem of MTC UE access in the -A system.
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JP2016532199A JP6198950B2 (ja) | 2013-08-09 | 2014-05-26 | ランダムアクセスチャネルリソース設定方法及びシステム |
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