WO2010015150A1 - 一种指示发送和发送前导序列的方法、系统及装置 - Google Patents
一种指示发送和发送前导序列的方法、系统及装置 Download PDFInfo
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- WO2010015150A1 WO2010015150A1 PCT/CN2009/000903 CN2009000903W WO2010015150A1 WO 2010015150 A1 WO2010015150 A1 WO 2010015150A1 CN 2009000903 W CN2009000903 W CN 2009000903W WO 2010015150 A1 WO2010015150 A1 WO 2010015150A1
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- random access
- physical random
- channel
- identifier
- access channel
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000005540 biological transmission Effects 0.000 title description 5
- 230000011664 signaling Effects 0.000 claims description 17
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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
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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
- H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to wireless communication technologies, and more particularly to a method, system and apparatus for indicating transmission and transmission of a preamble sequence. Background technique
- Random access technology is an important function of modern cellular mobile communication systems. In many scenarios, random access must be performed first to continue subsequent operations.
- LTE Long Term Evolution
- an evolved base station selects a dedicated preamble for a user terminal (UE). After obtaining the dedicated preamble, the UE selects a physical random access channel (PRACH). ) Send the dedicated preamble.
- eNodeB evolved base station
- PRACH physical random access channel
- the eNodeB can control the dedicated preamble to be used only by the UE, the collision is avoided, the probability of random access success of the UE is improved, and the access delay is effectively reduced.
- the UE selects the PRACH resource to send the dedicated preamble allocated by the eNodeB, thereby reducing resource utilization efficiency.
- the embodiments of the present invention provide a method, a system, and a device for indicating a sending and transmitting a preamble sequence, which are used to solve the problem in the prior art that the user terminal selects by itself in the current random access.
- the physical random access channel transmits a preamble sequence to the evolved base station, thereby reducing the problem of resource utilization efficiency.
- the determined channel identifier is sent to the terminal side, and the terminal side is instructed to send the preamble sequence by using the physical random access channel corresponding to the channel identifier.
- An evolved base station configured to determine a channel identifier corresponding to a physical random access channel allocated to the user terminal, and send the determined channel identifier to the user terminal;
- the user terminal is configured to determine, according to the received channel identifier, a corresponding physical random access channel, and send the preamble sequence by using the determined physical random access channel.
- a channel identifier determining module configured to determine a channel identifier corresponding to the physical random access channel allocated to the user terminal
- a channel identifier sending module configured to send the determined channel identifier to the user terminal, and instruct the user terminal to send a preamble sequence by using a physical random access channel corresponding to the channel identifier.
- An access channel determining module configured to determine, according to the received channel identifier from the evolved base station, a corresponding physical random access channel
- a preamble sequence sending module configured to send a preamble sequence by using the determined physical random access channel.
- the embodiment of the present invention determines a channel identifier corresponding to the physical random access channel allocated to the terminal side, and sends the determined channel identifier to the terminal side, where the terminal side is instructed to send by using the physical random access channel corresponding to the channel identifier.
- Lead sequence Since the physical random access channel can be specified, A dedicated preamble sequence is associated with multiple physical random access channels, and the user terminal transmits the preamble sequence through the designated physical random access channel, thereby improving resource utilization efficiency and system flexibility.
- FIG. 1 is a schematic diagram of a non-contention random access procedure in an LTE system in the prior art
- FIG. 2 is a schematic structural diagram of a system for transmitting a preamble sequence according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of an evolved base station according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of a user terminal according to an embodiment of the present invention.
- FIG. 5 is a schematic flowchart of a method for instructing a terminal to send a preamble sequence according to an embodiment of the present invention
- FIG. 6 is a schematic flowchart of a method for transmitting a preamble sequence according to an embodiment of the present invention
- FIG. 7 is a schematic diagram of physical random access channel parameters sorted by time-frequency domain in an LTE FDD according to an embodiment of the present invention.
- FIG. 8 is a schematic diagram of physical random access channel parameters sorted by time-frequency domain in LTE TDD according to an embodiment of the present invention. detailed description
- the network side allocates a physical random access channel to the terminal side, and sends the channel identifier corresponding to the physical random access channel to the terminal side, where the terminal side sends the preamble sequence by using the physical random access channel corresponding to the received channel identifier. Since the physical random access channel can be specified, the resource utilization efficiency and the flexibility of the system are improved.
- the system for transmitting a preamble sequence in the embodiment of the present invention includes: an evolved base station 10 and a user terminal 20.
- the evolved base station 10 is configured to determine a channel identifier corresponding to the physical random access channel allocated to the user terminal 20, and send the determined channel identifier to the user terminal 20.
- the user terminal 20 is configured to determine, according to the received channel identifier from the evolved base station 10, a corresponding The physical random access channel transmits a preamble sequence through the determined physical random access channel.
- the evolved base station in this embodiment of the present invention includes: a channel identifier determining module 100 and a channel identifier sending module 110.
- the channel identifier determining module 100 is configured to determine a channel identifier corresponding to the physical random access channel allocated to the user terminal.
- the channel identifier determining module 100 may further include: a first identifier determining module 1000.
- the first identifier determining module 1000 is configured to determine, according to a preset correspondence between the physical random access channel and the channel identifier, a channel identifier corresponding to the physical random access channel allocated to the user terminal.
- the correspondence between the physical random access channel and the channel identifier may be stored in a database or a file or other form, and may be stored in the evolved base station in this embodiment, or may be stored in other entities for implementation.
- the channel identifier determining module 100 may further include: a first storage module 1010, a first configuration identifier determining module 1020, a selecting module 1030, and a second identifier determining module. 1040.
- the first storage module 1010 is configured to save a physical random access channel configuration table.
- the physical random access channel configuration table is a physical random access channel configuration table specified by the technical specification (Ts) 36.211 physical channel and modulation (Physical Channels and Modulation), and is classified into LTE frequency division duplex (FDD). Physical random access channel configuration table and physical random access channel configuration table in LTE Time Division Duplex (TDD).
- Ts technical specification
- TDD Time Division Duplex
- the first storage module 1010 can simultaneously save the physical random access channel configuration table of the LTE FDD and the LTE TDD, and can also save one of the physical random access channel configuration tables according to the application environment.
- the first configuration identifier determining module 1020 is configured to determine a current physical random access channel configuration identifier.
- the manner of determining the current physical random access channel configuration identifier includes, but is not limited to, one of the following methods:
- the LTE FDD is also an LTE TDD
- the current physical random access channel configuration identifier is determined according to the corresponding physical random access channel configuration table.
- the selecting module 1030 is configured to search for a physical random access channel parameter corresponding to the determined current physical random access channel configuration identifier from the saved physical random access channel configuration table, and select a physical random access channel parameter therefrom.
- the different physical random access channel configuration identifiers may correspond to one or more physical random access channel parameters, and the selecting module 1030 needs to select one of the physical random access channel parameters corresponding to the current physical random access channel configuration identifier.
- the LTE FDD is used as an example. If the current physical random access channel configuration identifier is 12, the content of the current physical random access channel configuration identifier 12 in the physical random access channel configuration table is shown in Table 1.
- the subframe label can be used as a physical random access channel parameter, that is, in the LTE FDD, the physical random access channel configuration identifier 12 corresponds to a physical random There are a total of five access channel parameters.
- the selection module 1030 needs to select one of the five physical random access channel parameters.
- each subframe may have multiple physical random access channels. It can be seen from Table 2 that in the LTE TDD, the physical random access channel configuration identifier 18 corresponds to the physical random access channel parameters. 42.
- the selection module 1030 selects one of the 42 physical random access channel parameters according to the uplink and downlink configuration. For example: If the current uplink and downlink configuration is 4, then (0,0,0,1), (0,0,0,0), (1,0,0,1), (1,0,0,0 ), select one of (2,0,0,1) and (2,0,0,0).
- the second identifier determining module 1040 is configured to determine a location identifier of the selected physical random access channel parameter according to a preset channel parameter order, and use the location identifier as a channel identifier corresponding to the physical random access channel.
- the channel parameter arrangement order can be set as needed.
- the order of channel parameters can be determined according to the time domain of the first frequency domain.
- the position identifiers corresponding to the subframe labels 0, 2, 4, 6, 8 are 0, 1, 2, 3, 4, respectively.
- the order of the channel parameters can also be determined in the manner of the time domain after the frequency domain.
- the position identifiers corresponding to the subframe labels 0, 2, 4, 6, 8 are 0, 1, 2, 3, 4, respectively. See Figure 7, which can be seen from Figure 7 for the LTE FDD, the first frequency domain and the time domain mode.
- the channel parameters in the first-time domain and the rear-frequency domain are arranged in the same order.
- the position identifiers corresponding to (2, 0, 0, 0) are 1, 0, 3, 2, 5, 4, respectively, see Figure 8.
- the location identifier can also be represented by two values, that is, one row value and one column value. Take Table 2 as an example: For example: The two values in the location identifier are the first row and the last column.
- the order of the channel parameters is as follows: for all uplink and downlink configurations, first left and right, first up and then down, then (0,0,0,1 ), (0,0,0,0), (1,0,0,1), (1,0,0,0), (2,0,0,1) and (2,0,0,0).
- the corresponding location identifiers can be:
- the position identifiers corresponding to , 0,0), (2,0,0,1) and (2,0,0,0) can be: (1, 5), (2, 5), (3, 5) , (4, 5), (5, 5), (6, 5).
- the location identifier is two values, that is, one row value and one column value. There are many other ways to assign location identifiers:
- the two values in the position identifier are first and last.
- the order of the channel parameters is first left and right, first down, then up, according to (0,0,0,1) shown in Figure 8. (0,0,0,0) (1,0,0,1). (1,0,0,0), (2,0,0,1) and (2,0,0,0) positions, Since (0,0,0,0), (1,0,0,0) and (2,0,0,0) are in the third sub-frame, the corresponding column can be 3, (0,0,0) , 1).
- the corresponding column can be 4, then (0,0,0,1), (0 , 0,0,0), (1,0,0,1), (1,0,0,0), (2,0,0,1) and (2,0,0,0) corresponding positions
- the logos can be:
- the order of the channel parameters can also be sorted for a single uplink and downlink configuration. It can be seen that the order of the channel parameters can be set as needed, and is not limited to the above example.
- the channel identifier sending module 110 is configured to send the determined channel identifier to the user terminal, and use the indication The user terminal transmits the preamble sequence by using the physical random access channel corresponding to the channel identifier.
- the channel identifier sending module 110 may further include: a first processing module 1100 and a first configuration signaling sending module 1110.
- the first processing module 1100 is configured to place the determined channel identifier in the configuration signaling.
- the first configuration signaling sending module 1110 is configured to send the configuration signaling processed by the first processing module 1100 to the user terminal.
- the configuration signaling includes:
- the PRACH indicates (Index) (3 bits) and the Preamble Index (6 bits), wherein the Preamble Index is used to indicate the dedicated Preamble assigned to the user terminal, and there is no indication in the PRACH Index in the prior art, where the channel identifier can be placed. In the PRACH Index.
- 3 bits can only represent 8 channel identifiers, it can be specified that the terminal side selects one of the first 8 or the last 8 channel identifiers, and if it is the last 8, 2, 3, 4, 5, 6, 7, 8, 9
- the corresponding channel identifiers are 0, 1, 2, 3, 4, 5, 6, and 7, respectively. Therefore, you can also expand the PRACH Index to change the PRACH Index to 4bit.
- the user terminal in the embodiment of the present invention includes: an access channel determining module 200 and a preamble sending module 210.
- the access channel determining module 200 is configured to determine a corresponding physical random access channel according to the received channel identifier from the evolved base station.
- the access channel determining module 200 may further include: a first channel determining module 2000, where the physical random access channel may be determined according to a preset correspondence.
- the first channel determining module 2000 is configured to determine, according to a preset correspondence between the physical random access channel and the channel identifier, a physical random access channel corresponding to the received channel identifier.
- the correspondence between the physical random access channel and the channel identifier preset in the user terminal needs to be the same as the corresponding relationship between the physical random access channel and the channel identifier preset in the evolved base station.
- the access channel determining module 200 may further include: a second storage module 2010, a second configuration identifier determining module 2020, a searching module 2030, and a second channel determining module. 2040.
- the second storage module 2010 is configured to save a physical random access channel configuration table.
- the physical random access channel configuration table saved by the second storage module 2010 is the same as the physical random access channel configuration table saved by the first storage module 1010 in FIG. 3, and details are not described herein.
- the second configuration identifier determining module 2020 is configured to determine a current physical random access channel configuration identifier.
- the manner in which the second configuration identifier determining module 2020 determines the current physical random access channel configuration identifier is the same as the manner in which the first configuration identifier determining module 1020 in FIG. 3 determines the current physical random access channel configuration identifier, and is not described.
- the searching module 2030 is configured to search for a physical random access channel parameter corresponding to the current physical random access channel configuration identifier from the saved physical random access channel configuration table.
- the physical random access channel parameter searched by the lookup module 2030 is the physical random access corresponding to the current uplink and downlink configuration of the current physical random access channel configuration identifier.
- the physical random access channel parameter searched by the searching module 2030 is all physical random access channel parameters corresponding to the current physical random access channel configuration identifier.
- the channel parameter ordering sequence is for a single uplink and downlink configuration. If the current uplink and downlink configuration is 4, the physical random access channel parameters found are (0, 0, 0, 1), (0, 0). ,0,0), (1,0,0,1), (1,0,0,0), (2,0,0,1) ⁇ (2,0,0,0);
- the channel parameter order is that for all uplink and downlink configurations, the physical random access channel parameters found are all 42 physical random access channel parameters.
- a second channel determining module 2040 configured to perform a check according to a preset channel parameter sequence Determining, by the found physical random access channel parameter, a physical random access channel parameter corresponding to the received channel identifier from the evolved base station, and determining a corresponding physical random access channel according to the determined physical random access channel parameter.
- the order of the channel parameters preset in the sequence is the same as the sequence of the channel parameters preset in the evolved base station, so that the second channel determining module 2040 can accurately find the corresponding physical random access channel.
- the second channel determining module 2040 also adopts a pre-frequency domain post-time domain manner; if the evolved base station adopts a first-time domain post-frequency domain manner, the second channel determining module The 2040 also uses the first-time domain and the post-frequency domain.
- the channel identifier sent by the evolved base station is 3, and the physical random access channel parameter found by the searching module 2030 is (0, 0, 0, 1), 0,0,0,0), (1,0,0,1), (1,0,0,0). (2,0,0,1) ⁇ (2,0,0,0), corresponding
- the location identifiers are 3, 0, 4, 1, 5, 2.
- the physical random access channel corresponding to (0, 0, 0, 1) is finally determined to be a physical random required. Access channel.
- the preamble sequence sending module 210 is configured to send the preamble sequence by using the physical random access channel determined by the access channel determining module 200.
- the manner in which the user terminal searches for the channel identifier must be the same as the manner in which the evolved base station searches for the channel identifier, that is, if the evolved base station searches for the channel identifier by using the correspondence between the preset physical random access channel and the channel identifier, the user terminal It is also necessary to look up in the same way; correspondingly, if the evolved base station searches for the channel identifier by using the channel parameter arrangement order, the user terminal also needs to look up in the same manner.
- the method for instructing a terminal to send a preamble sequence includes the following steps: Step 500: The network side determines a channel identifier corresponding to a physical random access channel allocated to the terminal side.
- Step 501 The network side sends the determined channel identifier to the terminal side, and instructs the terminal side to send the preamble sequence by using the physical random access channel corresponding to the channel identifier.
- the channel identifier may be searched according to the preset correspondence.
- the channel corresponding to the physical random access channel allocated to the terminal side is determined according to the preset correspondence between the physical random access channel and the channel identifier. logo.
- the correspondence between the physical random access channel and the channel identifier may be stored in a database or a file or other form, and may be stored in the evolved base station on the network side of the embodiment, or may be stored in other entities.
- the evolved base station on the network side searches.
- the channel identifier may be further searched according to the set channel parameter arrangement order, and the step 500 may further include:
- Step a500 The network side determines a current physical random access channel configuration identifier.
- Step b500 The network side searches for the physical random access channel parameter corresponding to the current physical random access channel configuration identifier from the saved physical random access channel configuration table, and selects a physical random access channel device.
- Step c500 The network side determines a location identifier of the selected physical random access channel parameter according to a preset sequence of channel parameters, and uses the location identifier as a channel identifier.
- the physical random access channel configuration table is a physical random access channel configuration table specified by the Ts 36.211 Physical Channels and Modulation, and is divided into a physical random access channel configuration table in the LTE FDD and a physical random access channel configuration in the LTE TDD. table.
- the physical random access channel configuration table of the LTE FDD and the LTE TDD may be saved at the same time, or one physical random access channel configuration table may be saved according to the application environment.
- step a500 the manner of determining the current physical random access channel configuration identifier includes, but is not limited to, one of the following modes:
- step b500 when the physical random access channel parameter is selected, different physical random access channel configuration identifiers correspond to one or more physical random access channel parameters, and the physical random access corresponding to the current physical random access channel configuration identifier is required. Select one of the access channel parameters as the allocation The physical random access channel parameter corresponding to the physical random access channel of the user terminal.
- the content corresponding to the current physical random access channel configuration identifier 12 in the physical random access channel configuration table is shown in Table 1. Since the LTE FDD has only one physical random access channel per subframe, the subframe label can be used as a physical random access channel parameter, that is, in the LTE FDD, the physical random access channel configuration identifier 12 corresponds to a physical random There are a total of five access channel parameters, and one of the five physical random access channel parameters needs to be selected.
- each subframe may have multiple physical random access channels. As shown in Table 2, in the LTE TDD, there are 42 physical random access channel parameters corresponding to the current physical random access channel configuration identifier 18. .
- one of the 42 physical random access channel parameters is selected. For example: If the current uplink and downlink configuration is 4, Bay J is from (0,0,0,1), (0,0,0,0), (1,0,0,1), (1,0,0, Select one of 0), (2,0,0,1) and (2,0,0,0).
- step c500 the channel parameter arrangement order can be set as needed.
- the order of channel parameters can be determined according to the time domain of the first frequency domain.
- the position identifiers corresponding to the subframe labels 0, 2, 4, 6, 8 are 0, 1, 2, 3, 4, respectively. See Figure 2 for an example:
- the order of the channel parameters can also be determined in the manner of the time domain after the frequency domain.
- the position identifiers corresponding to the subframe labels 0, 2, 4, 6, 8 are 0, 1, 2, 3, 4, respectively. See Figure 7. From Figure 7, it can be seen that for LTE FDD, the first frequency domain is followed by the time domain mode and First-time domain and post-frequency domain The channel parameters are arranged in the same order.
- the location identifier can also be represented by two values, that is, one row value and one column value. Take Table 2 as an example: For example: The two values in the location identifier are the first row and the last column.
- the order of the channel parameters is as follows: for all uplink and downlink configurations, first left and right, first up and then down, then (0,0,0,1 ), (0,0,0,0), (1,0,0,1), (1,0,0,0), (2,0,0,1) and (2,0,0,0
- the corresponding location identifiers can be:
- channel parameters are arranged in the order of the first uplink and downlink configuration, then (0,0,0,1),
- the location identifiers can be: (1, 5), (2, 5), (3, 5), (4, 5), (5, 5), (6, 5).
- the location identifier is two values, that is, one row value and one column value. There are many other ways to assign location identifiers:
- the two values in the position identifier are first and last.
- the order of the channel parameters is first left and right, then up, according to (0,0,0,1) shown in Figure 8. (0,0,0,0), (1,0,0,1), (1,0,0,0), (2,0,0,1) and (2,0,0,0) positions Since (0,0,0,0), (1,0,0,0) and (2,0,0,0) are in the third sub-frame, the corresponding column can be 3, (0,0, 0,1), (1,0,0,1) and (2,0,0,1) on the fourth sub-frame, the corresponding column can be 4, then (0,0,0,1), ( 0,0,0,0), (1,0,0,1), (1,0,0,0), (2,0,0,1) ⁇ (2,0,0,0)
- the location identifiers can be:
- the order of the channel parameters can also be sorted for a single uplink and downlink configuration. It can be seen that the order of the channel parameters can be set as needed, and is not limited to the above example.
- the channel identifier may be placed in the configuration signaling, and the configuration signaling is sent to the terminal side.
- the configuration signaling includes:
- the PRACH Index (3 bits) and the Preamble Index (6 bits), where the Preamble Index is used to indicate the dedicated Preamble assigned to the user terminal, whereas the PRACH Index is not indicated in the prior art, and the channel identifier can be placed in the PRACH Index.
- 3 bits can only represent 8 channel identifiers, it can be specified that the terminal side selects one of the first 8 or the last 8 channel identifiers, and if it is the last 8, 2, 3, 4, 5, 6, 7, 8, 9
- the corresponding channel identifiers are 0, 1, 2, 3, 4, 5, 6, and 7, respectively. Therefore, you can also expand the PRACH Index to change the PRACH Index to 4bit.
- step 500 the method further includes:
- Step S1 The network side determines whether a physical random access channel is specified. If yes, step 500 is performed; otherwise, S2 is performed.
- Step S2 The network side sends information indicating that the terminal side selects a physical random access channel by itself.
- the information indicating that the terminal side selects the physical random access channel is placed in the configuration signaling, and is sent to the terminal side.
- one of the 3 bits of the PRACH Index may be used as the indication information indicating that the terminal side selects the physical random access channel, for example: 111. If one of the 3 bits is used as the indication information, then for Table 3 In the case, it is necessary to specify one of the first 7 or the last 7 channel identifiers. In this way, the indication information can also be regarded as the channel identifier of the physical random access channel, but the channel identifier can correspond to multiple physical random access channels, and the terminal side selects multiple physical random accesses according to the channel identifier. Select one of the channels.
- One of the 4 bits of the extended PRACH Index may also be encoded as the indication information, for example: 1111.
- the configuration signaling is an existing configuration signal
- the PRACH Index does not have any information, it is considered to indicate that the user terminal itself selects a physical random access channel.
- the method for transmitting a preamble sequence in the embodiment of the present invention includes the following steps: Step 600: The terminal side determines a corresponding physical random access channel according to the received channel identifier from the network side.
- Step 601 The terminal side sends a preamble sequence by using the determined physical random access channel.
- the physical random access channel may be determined according to the preset correspondence.
- the physical random connection corresponding to the received channel identifier is determined according to the preset correspondence between the physical random access channel and the channel identifier. Into the channel.
- the correspondence between the physical random access channel and the channel identifier preset in the terminal side needs to be the same as the corresponding relationship between the physical random access channel and the channel identifier preset in the network side.
- the channel identifier may be further searched according to the set channel parameter arrangement order, and the step 600 may further include:
- Step a600 Determine a current physical random access channel configuration identifier.
- Step b600 Search for a physical random access channel parameter corresponding to the current physical random access channel configuration identifier from the saved physical random access channel configuration table.
- Step c600 Determine, according to the preset channel parameter arrangement order, the received physical random access channel parameter corresponding to the received channel identifier from the network side from the found physical random access channel parameters.
- Step d600 Determine a corresponding physical random access channel according to the physical random access channel parameter.
- the physical random access channel configuration table saved on the terminal side is the same as the physical random access channel configuration table saved on the network side in FIG. 5, and details are not described herein.
- step a600 the manner of determining the current physical random access channel configuration identifier is determined in FIG. 5
- the manner of the current physical random access channel configuration identifier is the same, and is not described here.
- the physical random access channel parameter that is searched in step b600 is the physical random connection corresponding to the current uplink and downlink configuration of the current physical random access channel configuration identifier.
- the physical random access channel parameter that is found in step b600 is all physical random access channel parameters corresponding to the current physical random access channel configuration identifier.
- the channel parameter ordering sequence is for a single uplink and downlink configuration. If the current uplink and downlink configuration is 4, the physical random access channel parameters found in step b600 are (0, 0, 0, 1). , (0,0,0,0), (1,0,0,1), (1,0,0,0), (2,0,0,1) and (2,0,0,0) ;
- the channel parameter ordering sequence is for all uplink and downlink configurations.
- the physical random access channel parameters found are all 42 physical random access channel parameters.
- step c600 the preset channel parameter arrangement order is the same as the preset channel parameter arrangement order in the network side, so that the corresponding physical random access channel can be accurately found.
- the method of the pre-frequency domain and the time domain is also adopted in the step c600. If the network side adopts the first-time domain and the post-frequency domain, the pre-time domain is also used in the step c600. The way of the post-frequency domain.
- the channel identifier sent by the network side is 3, and the physical random access channel parameter found in step c600 is (0, 0, 0, 1), 0,0,0,0), (1,0,0,1), (1,0,0,0), (2,0,0,1) ⁇ (2,0,0,0), corresponding
- the location identifiers are 3, 0, 4, 1, 5, 2.
- the physical random access channel corresponding to (0, 0, 0, 1) is finally determined to be a physical random required. Access channel.
- the manner in which the terminal side searches for the channel identifier must be the same as the manner in which the network side searches for the channel identifier, that is, if the network side searches for the channel identifier by using the correspondence between the preset physical random access channel and the channel identifier, the terminal side It is also necessary to look up in the same way; correspondingly, if the network side uses the channel parameter arrangement order to find the channel identifier, the terminal side also needs to look up in the same manner.
- the embodiment of the present invention determines the physical randomness allocated to the terminal side.
- the channel identifier corresponding to the access channel PRACH is sent to the terminal side, and the terminal side is instructed to send the preamble sequence by using the physical random access channel corresponding to the channel identifier. Since the physical random access channel can be specified such that a dedicated preamble sequence corresponds to multiple physical random access channels, the user terminal transmits the preamble sequence through the designated physical random access channel, thereby improving resource utilization efficiency and system flexibility. .
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EP09804450.6A EP2317820B1 (en) | 2008-08-07 | 2009-08-07 | Method and device for indicating transmission and transmitting preamble |
KR1020117005163A KR101209823B1 (ko) | 2008-08-07 | 2009-08-07 | 전송을 지시 및 프리앰블을 전송하는 방법, 시스템 및 장치 |
US13/057,363 US8504051B2 (en) | 2008-08-07 | 2009-08-07 | Method, system and device for instructing transmission of preamble and for transmitting preamble |
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CN102480794B (zh) * | 2010-11-22 | 2014-07-02 | 中兴通讯股份有限公司 | 一种专用前导资源分配的方法及装置 |
CN102036411B (zh) * | 2010-12-02 | 2013-06-26 | 大唐移动通信设备有限公司 | 一种进行随机接入的方法及装置 |
WO2014067039A1 (zh) * | 2012-10-29 | 2014-05-08 | 华为技术有限公司 | 传输方法、用户设备、无线网络控制器和基站 |
WO2015119555A1 (en) * | 2014-02-06 | 2015-08-13 | Telefonaktiebolaget L M Ericsson (Publ) | Random access procedure |
US10154519B2 (en) * | 2014-02-19 | 2018-12-11 | Telefonaktiebolaget Lm Ericsson (Publ) | PRACH selection in combined radio cell deployments |
CN105636207A (zh) * | 2014-10-28 | 2016-06-01 | 电信科学技术研究院 | 一种传输上行数据的方法和设备 |
CN108282898B (zh) * | 2017-01-06 | 2023-10-24 | 华为技术有限公司 | 随机接入方法、用户设备和网络设备 |
CN108738141B (zh) * | 2017-04-21 | 2020-04-17 | 中国移动通信有限公司研究院 | 一种物理随机接入信道参数的配置方法、网络侧设备及终端 |
WO2019051654A1 (zh) | 2017-09-12 | 2019-03-21 | Oppo广东移动通信有限公司 | 一种逻辑信道的资源确定方法及装置、计算机存储介质 |
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CN1327697A (zh) * | 1999-08-03 | 2001-12-19 | 皇家菲利浦电子有限公司 | 用于在无线电通信系统中分配随机接入信道的方法与系统 |
WO2001074107A1 (en) * | 2000-03-28 | 2001-10-04 | Koninklijke Philips Electronics N.V. | Use of time offsets to encode information in a random access channel |
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KR20110044275A (ko) | 2011-04-28 |
CN101646250A (zh) | 2010-02-10 |
EP2317820A4 (en) | 2011-09-14 |
EP2317820A1 (en) | 2011-05-04 |
EP2317820B1 (en) | 2015-10-07 |
US8504051B2 (en) | 2013-08-06 |
KR101209823B1 (ko) | 2012-12-11 |
CN101646250B (zh) | 2012-08-29 |
US20110294513A1 (en) | 2011-12-01 |
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