CN109963283B - LTE cell implementation method - Google Patents

LTE cell implementation method Download PDF

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Publication number
CN109963283B
CN109963283B CN201711401978.9A CN201711401978A CN109963283B CN 109963283 B CN109963283 B CN 109963283B CN 201711401978 A CN201711401978 A CN 201711401978A CN 109963283 B CN109963283 B CN 109963283B
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cell
module
uplink
information
downlink
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CN109963283A (en
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魏立梅
黄杨晖
谢生鹤
李振辉
董又铭
袁乃华
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Chengdu TD Tech Ltd
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Chengdu TD Tech Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • 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
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application discloses a method for realizing an LTE cell, which comprises the following steps: decomposing a special FDD cell into a primary cell and at least one secondary cell; the cell is configured with a pair of FDD carriers and at least one uplink auxiliary carrier, and the main cell is formed by the pair of FDD carriers; the uplink carrier of each auxiliary cell is an uplink auxiliary carrier of the FDD cell, and the downlink carrier is a downlink carrier in a pair of FDD carriers; when OMC or LMT configures the FDD cell, configuring a primary cell and a secondary cell in a configuration message correspondingly; when the eNodeB receives the cell configuration message and knows that the cell is a special FDD cell, the eNodeB establishes a corresponding primary cell and secondary cell in modules L3, L2, and L1, associates the primary cell established by each module with the secondary cell of the same module, associates the primary cell established by the module L3 with the primary cell of modules L2 and L1, and associates the secondary cell of the module L3 with the corresponding secondary cell of the modules L2 and L1. The invention is suitable for the scene that the uplink bandwidth demand in the cell is greater than the downlink bandwidth demand.

Description

Method for realizing LTE cell
Technical Field
The invention relates to a mobile communication technology, in particular to a method for realizing an LTE cell.
Background
Currently, in the third generation partnership project (3GPP) protocol for the radio interface, the Frequency Division Duplex (FDD) cell of LTE has a pair of carriers: the system comprises an uplink carrier and a downlink carrier, wherein the downlink carrier transmits a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS) and a Physical Broadcast Channel (PBCH). User Equipment (UE) acquires a physical layer cell Identifier (ID) of an FDD cell, a duplex mode of the cell and radio frame timing and subframe timing of the cell by detecting PSS and SSS carried by a downlink carrier. Then, the UE may determine the lower two bits of the radio frame number in the FDD cell and the number of downlink transmission ports in the cell by detecting the PBCH carried by the downlink carrier, and may obtain the following information through a Master Information Block (MIB) carried on the PBCH: the downlink bandwidth of the FDD cell, the group number of a physical HARQ (hybrid automatic repeat request) indicator channel (PHICH) and the upper 8 bits of the radio frame number of the FDD cell.
After acquiring the information, the UE may receive a Physical Control Format Indicator Channel (PCFICH) in each downlink subframe, and determine the length of the control region of the current subframe according to a Control Format Indicator (CFI) carried on the PCFICH. Then, the UE may detect a Physical Downlink Control Channel (PDCCH) in a search space corresponding to the PDCCH in the current subframe control region; the UE acquires scheduling information of the system information through the PDCCH scrambled by the detected system information-radio network temporary identifier (SI-RNTI), receives a corresponding PDSCH according to the scheduling information, can capture a System Information Block (SIB)1 and other SIBs, and can acquire all configuration information of the FDD cell from the SIBs; the UE can obtain scheduling information of paging information by detecting a PDCCH scrambled by a paging-radio network temporary identifier (P-RNTI), and can capture the paging information by receiving a corresponding PDSCH according to the scheduling information; the UE in a radio connection state (RRC _ CONNECTED) can obtain uplink or downlink dynamic scheduling information by detecting a PDCCH scrambled by a cell-radio network temporary identifier (C-RNTI); uplink or downlink semi-persistent scheduling information can be obtained by detecting a PDCCH scrambled by a semi-persistent scheduling-radio network temporary identifier (SPS C-RNTI); the UE may also obtain other types of information by detecting PDCCH scrambled by other types of RNTI, such as: after transmitting a Physical Random Access Channel (PRACH) in a random access procedure, a UE may obtain scheduling information of a Random Access Response (RAR) by detecting a PDCCH scrambled by a random access-radio network temporary identity (RA-RNTI); when receiving a Multimedia Broadcast Multicast Service (MBMS) transmitted in a multimedia broadcast multicast service single frequency network (MBSFN) manner, UE can obtain a Multicast Control Channel (MCCH) change notification by detecting a Physical Downlink Control Channel (PDCCH) scrambled by a multimedia broadcast multicast service-radio network temporary identifier (M-RNTI); when receiving an MBMS service transmitted in a single cell-point to multipoint (SC-PTM) mode, a UE can obtain a single cell-multicast control channel (SC-MCCH) change notification by detecting a PDCCH scrambled by a single cell-radio network temporary identifier (SC-RNTI).
After detecting the PDCCH scrambled by the C-RNTI, the UE in RRC _ CONNECTED may perform corresponding processing according to specific dynamic scheduling information carried on the PDCCH: when the PDCCH bears the uplink dynamic scheduling information, the UE sends a Physical Uplink Shared Channel (PUSCH) according to the scheduling information, receives a PHICH (physical uplink shared channel) fed back by a base station (eNodeB) according to the time sequence relation between the PUSCH and the PHICH, and the PHICH bears the acknowledgement/non-acknowledgement (ACK/NACK) information of a Transmission Block (TB) on the PUSCH; when the PDCCH bears downlink dynamic scheduling information, the UE receives a Physical Downlink Shared Channel (PDSCH) according to the scheduling information, and sends a Physical Uplink Control Channel (PUCCH) according to the time sequence relation between the PDSCH and the PUCCH, and the PUCCH bears ACK/NACK information of a TB on the PDSCH.
After detecting the PDCCH scrambled by the SPS C-RNTI, the UE in RRC _ CONNECTED may perform corresponding processing according to specific semi-persistent scheduling information carried on the PDCCH: when the PDCCH bears the uplink semi-persistent scheduling activation information, the UE determines the resource allocation of a semi-persistent PUSCH according to the information, periodically sends the PUSCH according to the allocation information, receives the PUSCH which is fed back by the eNodeB and corresponds to the sending of the PUSCH according to the time sequence relation between the PUSCH and the PHICH after each PUSCH sending, and bears the ACK/NACK information of the TB on the PUSCH; when the PDCCH bears downlink semi-static scheduling activation information, the UE determines the resource allocation of the semi-static PDSCH according to the information, periodically receives the PDSCH according to the allocation information, sends the PUCCH according to the time sequence relation between the PDSCH and the PUCCH after receiving the PDSCH every time, and bears the ACK/NACK information of the TB on the PDSCH; and when the PDCCH bears the uplink or downlink semi-static scheduling release information, the UE releases the previously configured semi-static PUSCH or PDSCH resources.
The above is an overview of the respective functions performed by the UE in the FDD cell and the TDD cell in the LTE system. However, in an actual networking, there is a scenario in which: there is a pair of FDD carriers or a TDD carrier, and one or more inter-frequency point carriers. These inter-frequency point carriers may be licensed or unlicensed carriers. The uplink transmission performed by the UE on these different frequency point carriers does not interfere much with the existing traffic on the carriers, and such carriers can be used only for uplink transmission. In practical service application, there are service demands for video uploading in many scenes, and the demand for uplink bandwidth in a cell is far greater than the demand for downlink bandwidth. Aiming at an actual networking scene and a service application scene, how to use a pair of FDD carriers or a TDD carrier and a plurality of pilot frequency point carriers needs to be solved to solve the problem that the uplink bandwidth requirement in a cell is far greater than the downlink bandwidth requirement in actual application.
Disclosure of Invention
In view of this, the main objective of the present invention is to provide a method for implementing an LTE cell, which can solve the problem that the uplink bandwidth requirement in a cell is much greater than the downlink bandwidth requirement in practical application.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a method for implementing an LTE cell comprises the following steps:
a. for a special FDD cell, an operation management center OMC or a local maintenance terminal LMT decomposes the FDD cell into a main cell and at least one auxiliary cell; the special FDD cell is configured with a pair of Frequency Division Duplex (FDD) carriers and at least one uplink auxiliary carrier, and the main cell consists of the pair of FDD carriers of the FDD cell; for each secondary cell, the uplink carrier of the secondary cell is an uplink secondary carrier of the FDD cell, and the downlink carrier of the secondary cell is a downlink carrier of the pair of FDD carriers;
b. when OMC or LMT configures the FDD cell, configuring the primary cell and the secondary cell in a cell configuration message correspondingly;
c. when the base station eNodeB receives the cell configuration message, after knowing that the currently configured cell is a special FDD cell according to the cell type information element IE carried in the cell configuration message, according to the configuration in the message, respectively establishing an FDD primary cell and at least one secondary cell in the modules L3, L2, and L1, associating the primary cell established by each module with each secondary cell established by the same module, associating the primary cell established by the module L3 with the primary cell established by the module L2 and the primary cell established by the module L1, and associating each secondary cell established by the module L3 with the corresponding secondary cell established by the module L2 and the module L1.
In summary, in the method for implementing an LTE cell provided by the present invention, after the base station eNodeB learns that the currently configured cell is a special FDD cell according to the cell type IE carried in the cell configuration message, according to the configuration in the message, an FDD primary cell and at least one secondary cell are respectively established in the modules L3, L2, and L1, and the association relationship between the cells in each module and between the modules is established according to the following manner: the main cell established by each module is associated with each auxiliary cell established by the same module, the main cell established by the L3 module is associated with the main cells established by the L2 module and the L1 module respectively, and each auxiliary cell established by the L3 module is associated with the corresponding auxiliary cell established by the L2 module and the L1 module respectively, so that the carrier configuration of a special FDD cell can be realized, and then a plurality of uplink carriers in the cell can be utilized to solve the problem that the uplink bandwidth requirement in the cell is far greater than the downlink bandwidth requirement in practical application.
Drawings
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A special FDD/TDD cell can be established in an LTE system aiming at the requirement of uplink large bandwidth for uploading video and the conditions of a pair of available FDD carrier/one available TDD carrier and one or more available uplink carriers with different frequency points in an actual networking scene. For a particular FDD cell, the cell includes a pair of FDD carriers and one or more uplink carriers. The downlink carrier and the uplink carrier in a pair of FDD carriers are the only downlink carrier and the uplink primary carrier of the cell, respectively, and all other uplink carriers are the uplink secondary carriers of the cell. For a particular TDD cell, the cell includes one TDD carrier and 1 or more uplink carriers. The TDD carrier is the only carrier used for uplink and downlink transmission in the special cell, and is the downlink carrier and the uplink primary carrier, and all other uplink carriers are uplink secondary carriers of the cell. The invention provides a method for realizing an LTE cell, which is simultaneously suitable for a special FDD cell and a special TDD cell. However, the following embodiments will only describe the specific implementation method of the present invention for a specific FDD cell.
In a special FDD cell, the FDD frame structure is used: the single downlink carrier and each uplink carrier adopt FDD frame structure. The single downlink carrier in the cell performs all functions of the common downlink carrier in the FDD cell in the same manner, and the single uplink main carrier in the cell performs all functions of the common uplink carrier in the FDD cell in the same manner.
The UEs accessing the special FDD cell have two types:
(1) and (3) common UE: the UE of the type is the UE which only supports the common FDD cell. For such UEs, the cell is a normal FDD cell, which consists of only one pair of FDD carrier carriers: UE-related uplink transmission and downlink transmission are both on a pair of FDD carriers, and the UEs are not aware of other uplink secondary carriers in the cell at all.
(2) UE supporting special FDD cell (hereinafter referred to as new UE): such UEs report the capability of supporting a special FDD cell when accessing the cell. If the cell accessed by the UE is a common FDD cell, the eNodeB ignores the capability report; if the cell accessed by the UE is a special FDD cell, the eNodeB distributes uplink carriers to the UE according to the capability report: the UE may be allocated only the uplink primary carrier, or may be allocated multiple uplink carriers simultaneously, where the carriers may or may not include the uplink primary carrier. For such UEs, after the UE accesses the special FDD cell, the eNodeB carries an indication of the special FDD cell when allocating resources to the UE, or indicates in an implicit manner that the current cell is the special FDD cell through the allocated uplink carrier, such as: the allocated certain uplink carrier and the downlink carrier are not paired carriers.
However, the existing eNodeB implementation method only supports establishing a common FDD cell, but does not support establishing a special FDD cell. Specifically, when the eNodeB receives a cell configuration message from the OMC or the LMT, if the cell type carried in the message is an FDD cell, the FDD cell is established in the following manner. The cell type carried in the message may be: FDD cells or TDD cells.
The L3 module of the eNodeB creates an instance of an FDD cell according to the value of the cell type IE in the "cell configuration message" from the OMC or LMT, and assigns an instance number to the instance to identify the cell. The L3 module configures uplink and downlink wireless resources for the cell instance according to the carrier configuration information IE in the cell configuration message. When the cell type IE is an FDD cell, the carrier configuration information IE provides configuration information of a pair of FDD carriers.
The L3 module of the eNodeB instructs the L2 module to establish an instance of an FDD cell, the cell instance of the L2 module being associated with the cell instance of the L3 module.
The eNodeB's L3 module instructs the L1 module to establish an instance of an FDD cell. The cell instance of the L1 module is associated with the cell instance of the L3 module.
Aiming at the existing eNodeB realization method, the LTE cell realization method provided by the invention is not only suitable for a special LTE FDD cell, but also suitable for a special LTE TDD cell correspondingly.
Fig. 1 is a flowchart illustrating an LTE cell implementation method provided in an embodiment of the present invention, and as shown in fig. 1, the embodiment mainly includes:
step 101, for a special FDD cell, the OMC or LMT decomposes the FDD cell into a primary cell and at least one secondary cell; the special FDD cell is configured with a pair of Frequency Division Duplex (FDD) carriers and at least one uplink auxiliary carrier, and the main cell consists of the pair of FDD carriers of the FDD cell; for each secondary cell, the uplink carrier of the secondary cell is an uplink secondary carrier of the FDD cell, and the downlink carrier of the secondary cell is a downlink carrier of the pair of FDD carriers.
Step 102, when the OMC or the LMT configures the FDD cell, configuring the primary cell and the secondary cell in a cell configuration message accordingly.
Preferably, the following method may be adopted in this step, and the primary cell and the secondary cell are configured in the cell configuration message accordingly:
step 1021, setting the cell type Information Element (IE) in the cell configuration message to the IE value for indicating the cell type to be a special FDD cell.
Step 1022, in the cell configuration message, a pair of FDD carriers of the primary cell is indicated by using a carrier configuration information IE.
Step 1023, adding secondary cell configuration information IE in the cell configuration message, wherein the secondary cell configuration information IE contains the number IE of secondary cells and the carrier configuration information IE of each secondary cell; the carrier configuration information IE of each secondary cell is used to indicate an uplink carrier and a downlink carrier of one secondary cell.
Step 1024, configuring the physical layer cell ID of the FDD cell, the physical layer cell ID of the primary cell and the physical layer cell ID of each secondary cell by using a physical layer cell identity IE in the cell configuration message; wherein, the physical layer cell IDs of the FDD cell, the primary cell and the secondary cell are all numerical values indicated by the physical layer cell IE. That is, the physical layer cell IDs of the configured cells of the respective types are all the same, i.e., are all the numerical values indicated by the physical layer cell IE.
Step 103, when the base station eNodeB receives the cell configuration message, after knowing that the currently configured cell is a special FDD cell according to the cell type information element IE carried in the cell configuration message, according to the configuration in the message, respectively establishing an FDD main cell and at least one auxiliary cell in the modules L3, L2, and L1, associating the main cell established by each module with each auxiliary cell established by the same module, associating the main cell established by the module L3 with the main cell established by the module L2 and the module L1, and associating each auxiliary cell established by the module L3 with the corresponding auxiliary cell established by the module L2 and the module L1.
Preferably, this step can be implemented by the following method:
step 1031, when the L3 module of the eNodeB receives the cell configuration message, after knowing that the currently configured cell is a special FDD cell according to the cell type information element IE of the cell configuration message, the L3 module creates 1+ N cell instances for the cell, which correspond to a primary cell and N secondary cells, respectively; wherein, the N is the number of the secondary cells configured by the number of the secondary cells IE in the cell configuration message.
Step 1032, the eNodeB configures a pair of FDD carriers of the primary cell according to the carrier configuration information IE in the cell configuration message, and configures uplink carriers and downlink carriers of secondary cells according to the carrier configuration information IE of each secondary cell.
Wherein the configuration information of each carrier includes: the frequency point and bandwidth of the carrier, for the downlink carrier, the configuration information further includes: for the uplink carrier, the configuration information further includes: the configuration information of each uplink physical channel on the carrier wave comprises PRACH configuration information, PUCCH configuration information and SRS configuration information; and the transmission power of each downlink physical channel and each downlink physical signal on the downlink carrier wave of each secondary cell is configured to be 0.
Step 1033, the L3 module binds the established primary cell and N secondary cells, and configures the same physical layer cell ID for the primary cell and the N secondary cells, where the physical layer cell ID is obtained from the physical layer cell ID IE in the cell configuration message.
Step 1034, the L3 module configures 1+ N cells for the L2 module, where the 1+ N cells are respectively in one-to-one correspondence with the primary cell and the N secondary cells in the L3 module, and are respectively the primary cell and the N secondary cells in the L2 module; the L2 module creates a cell instance for each of the 1+ N cells, and binds each cell with a corresponding cell instance.
Step 1035, said L2 module configures an uplink scheduling module and a downlink scheduling module for each said cell instance; the configuration information of the uplink scheduling module comprises the bandwidth of an uplink carrier; the configuration information of the downlink scheduling module includes a bandwidth of a downlink carrier.
For the cell instance corresponding to each secondary cell, presetting the configured uplink scheduling module and the configured downlink scheduling module to be in a non-invoked state, namely: for the secondary cell, the uplink and downlink scheduling modules are not used; for the cell instance corresponding to the main cell, the configured uplink scheduling module and downlink scheduling module are used to execute the uplink scheduling and downlink scheduling of the 1+ N cells, that is, the uplink scheduling and downlink scheduling of all cells are respectively executed by the uplink scheduling module and the downlink scheduling module in the cell instance corresponding to the main cell.
Step 1036, configuring, by the L3 module, 1+ N cells for the L1 module, where the 1+ N cells are respectively in one-to-one correspondence with the one primary cell and the N secondary cells in the L3 module, and are respectively a primary cell and N secondary cells in the L1 module; the L3 module configures the physical layer cell ID of the 1+ N cells to a value corresponding to the physical layer cell ID IE in the cell configuration message; for the FDD cell, the L3 module configures the transmit power of each physical channel and physical signal on the downlink carrier in each secondary cell in the L1 module to 0; the L1 module creates a corresponding cell instance for each cell configured by the L3 module, and 1+ N cells of the L1 module are used to process uplink baseband signals from an uplink primary carrier and N uplink secondary carriers, respectively; the primary cell of the L1 module is responsible for sending downlink physical channels and physical signals of the primary cell and the N secondary cells, and the transmission power of each physical channel and physical signal on the downlink carrier of each secondary cell of the L1 module is set to 0.
Further, after the step 103, the method may further include: and the eNodeB executes the uplink processing process of the FDD cell.
Specifically, the uplink processing procedure includes the following steps:
and the main cell and each auxiliary cell in the L1 module respectively process baseband signals of PRACH, PUCCH and PUSCH on an uplink main carrier and each uplink auxiliary carrier, and respectively send the obtained data to the main cell of the L2 module and a storage area corresponding to each auxiliary cell, wherein the data comprises the detected UCI on the PRACH and PUCCH and the detected TB on the PUSCH.
Further, the uplink processing procedure may include: the processing of the MAC layer, the processing of the RLC layer and the processing of the PDCP layer in the primary cell instance in the L2 module.
Wherein the processing of the MAC layer comprises: processing for PRACH, processing for PUCCH, and processing for PUSCH.
Preferably, the processing of the PRACH may include the steps of:
(1) the uplink scheduling module of the MAC layer determines PRACH to be responded from the PRACH detected in the storage area of each cell in the L2 module, the PRACH to be responded is the PRACH detected in the same uplink subframe, and the uplink scheduling module of the MAC layer allocates PDCCH and PUSCH resources for the UE to transmit MSG3 to each PRACH to be responded; for each PRACH to which MSG3 resources are successfully allocated, the uplink scheduling module of the MAC layer instructs the downlink scheduling module to allocate PDCCH and PDSCH resources for transmitting RAR to the PRACH.
(2) And the downlink scheduling module of the MAC layer allocates PDCCH and PDSCH resources for sending RAR according to the indication of the uplink scheduling module of the MAC layer. And if the RAR resources are successfully allocated, sending RAR resource configuration information and MSG3 resource configuration information of each PRACH to the main cell of the L1 module.
The RAR resource configuration information includes PDCCH configuration information for sending a random access response, DCI on the PDCCH, and PDSCH configuration information.
The MSG3 resource configuration information of each PRACH includes PDCCH configuration information for transmitting MSG3, DCI on PDCCH, and TB on PDSCH in the RAR resource configuration information;
the TB on the PDSCH in the RAR resource configuration information consists of a training sequence Peam subscript corresponding to each responded PRACH, uplink authorization information and a Temporary C-RNTI; the uplink authorization information corresponding to each responded PRACH is scheduling information of a PUSCH carrying MSG3 sent by UE sending the responded PRACH, and the Temporary C-RNTI is used for identifying the UE sending the MSG 3;
preferably, the processing on the PUCCH specifically includes the following:
(1) UCI on PUCCH is used for carrying ACK/NACK information and/or CQI information.
(2) When UCI on PUCCH carries ACK/NACK information, if the information is NACK information, it indicates that the transport block TB on the corresponding PDSCH is not correctly received by UE, the MAC layer indicates the downlink scheduling module to be the TB on the PDSCH which is not correctly received by UE, and schedules PDSCH resources for retransmitting the TB; if the information is ACK information, which indicates that the transport block TB on the corresponding PDSCH is correctly received by the UE, the MAC layer sets the HARQ process of the hybrid automatic repeat request occupied by the TB on the corresponding PDSCH to idle, and can transmit the subsequent TB by using the process.
(3) When UCI on PUCCH carries CQI information, when a downlink scheduling module performs downlink scheduling on UE of each cell, reading the CQI information of the UE stored by an MAC layer in the cell to which the corresponding UE belongs, and scheduling the UE based on the wireless channel quality determined by the CQI information.
Preferably, the processing on the PUSCH may include the following:
(1) when the TB decoding on the PUSCH is correct, the MAC layer sets the corresponding HARQ process to be idle and analyzes the TB to obtain MAC SDU or/and MAC CE; the MAC layer analyzes the MAC CE to obtain control information from corresponding UE and stores the information; and the MAC layer sends the MAC SDU to a corresponding RLC entity of the RLC layer through a corresponding logical channel.
(2) When the decoding of the TB on the PUSCH is wrong, if the retransmission times of the TB do not reach the preset maximum retransmission times and the self-adaptive retransmission is adopted, the MAC layer instructs the uplink scheduling module to schedule PDSCH resources for the TB so as to retransmit the TB.
(3) When the TB decoding on the PUSCH is correct, the MAC layer generates ACK information; otherwise, the MAC layer generates NACK information; and the MAC layer sends ACK/NACK information of the TB on the PUSCH and a resource subscript of the PHICH feeding back the information to a primary cell of the L1 module.
(4) And the main cell of the L1 module encodes and modulates the ACK/NACK information, and then feeds back the modulated information to the UE through a corresponding PHICH channel according to the PHICH resource subscript.
Preferably, the RLC layer processing includes:
(1) the corresponding RLC entity of the RLC layer processes the MAC SDU from the corresponding logical channel to obtain the RLC SDU; if the RLC SDU comes from the control channel, the RLC SDU is an RRC message, and the RLC entity uploads the corresponding RLC SDU to an RRC layer;
(2) if the RLC SDU comes from the service channel, the RLC entity uploads the corresponding RLC SDU to a corresponding PDCP entity in the PDCP layer.
Preferably, the PDCP layer processing comprises:
and a corresponding PDCP entity in the PDCP layer processes the RLC SDU from the corresponding RLC entity to obtain the PDCP SDU, and the PDCP SDU is transmitted to a serving gateway (S-GW) through a corresponding EPS bearer on an S1 interface.
Preferably, the processing of the RRC layer includes:
the RRC layer processes the corresponding RRC message and executes the corresponding process according to the type of the message.
It should be noted that there are many types of RRC messages, and each type of RRC message has a corresponding processing flow. These procedures are not the content of the present invention and are not described herein again.
Further, the present embodiment may further include processing in the downlink direction:
in the L3 module, only the primary cell performs downlink processing, and the other secondary cells do not perform downlink processing. The L3 module configures the transmit power of all downlink physical channels and physical signals on each secondary cell in the L1 module to 0.
The primary cell in the L3 module indicates the primary cell of L1 to transmit PSS, SSS and PBCH.
Based on this, preferably, the step 103 may further include: the eNodeB executes the downlink processing process of the FDD cell; the downlink processing process comprises the following steps: control plane processing and user plane processing.
Specifically, the processing of the control plane includes: MIB, SIB, paging messages and UE-specific control signaling.
Wherein, the MIB, SIB, and paging message are common control information, and the processing procedure of these pieces of information includes:
(1) the MIB, SIB and paging messages correspond to different RLC entities in the primary cell in the L2 module; the primary cell in the L3 module places the MIB, SIB and paging messages in different locations in the memory area of the primary cell in the L2 module.
(2) The RLC entity corresponding to the MIB/SIB/paging message in the primary cell in the L2 module takes out the MIB/SIB/paging message from the corresponding position in the storage area of the primary cell in the L2 module, performs corresponding processing to obtain RLC PDU, and sends the RLC PDU to the MAC layer of the cell through a corresponding logical channel; the MIB and SIB correspond to different BCCH, and the paging message corresponds to PCCH.
(3) The BCCH corresponding to the MIB is mapped to a BCH and is finally sent through a PBCH; the time frequency resource occupied by PBCH is fixed; BCCH and PCCH bearing each SIB are mapped to different DL-SCH and finally transmitted through different PDSCHs; the MAC layer of the primary cell obtains the MIB from the corresponding BCCH, and sends the MIB to the primary cell of the L1 module through the BCH.
(4) The downlink scheduling module of the MAC layer in the main cell executes the following processing procedures, including:
the downlink scheduling module allocates PDCCH and PDSCH resources to BCCH carrying SIB and PCCH carrying paging message, and issues the configuration information of PDCCH, DCI information on PDCCH and PDSCH configuration information to the main cell of the L1 module, wherein the DCI information is the scheduling information of PDSCH.
After scheduling resources for the BCCH and the PCCH, the downlink scheduling module indicates the MAC layer of the main cell to assemble MAC PDU by RLC PDU from the BCCH/PCCH; and sending MAC PDUs on different logical channels to a primary cell of the L1 module through different DL-SCHs.
(5) For PDCCH and PDSCH corresponding to BCCH, the main cell in the L1 module performs channel coding and modulation on DCI on the PDCCH, when the DCI is subjected to channel coding, the DCI obtains 16-bit CRC, the CRC is scrambled by using SI-RNTI, then the subsequent processing of channel coding and symbol modulation are executed, a symbol stream is mapped onto the PDCCH, and then the PDCCH scrambled by the SI-RNTI is sent through a downlink carrier of the main cell; the primary cell of the L1 module performs channel coding and modulation on the MAC PDU on the DL-SCH, when the MAC PDU is subjected to channel coding, the MAC PDU obtains 16-bit CRC, the CRC is scrambled by using SI-RNTI, then the subsequent processing of the channel coding and the symbol modulation are executed, the symbol stream is mapped to the PDSCH, and then the PDSCH scrambled by the SI-RNTI is sent to the UE through a downlink carrier wave of the primary cell.
(6) For PDCCH and PDSCH corresponding to PCCH, a main cell in the L1 module performs channel coding and modulation on DCI on the PDCCH, when the DCI is subjected to channel coding, the DCI obtains 16-bit CRC, the CRC is scrambled by using P-RNTI, then the subsequent processing of channel coding and symbol modulation are executed, a symbol stream is mapped onto the PDCCH, and then the PDCCH scrambled by the P-RNTI is sent through a downlink carrier of the main cell; the primary cell of the L1 module performs channel coding and modulation on the MAC PDU on the DL-SCH, when the channel coding is performed on the MAC PDU, the MAC PDU obtains 16-bit CRC, the CRC is scrambled by P-RNTI, then the subsequent processing of the channel coding and the symbol modulation are executed, the symbol stream is mapped to the PDSCH, and then the PDSCH scrambled by the P-RNTI is sent to the UE through the downlink carrier wave of the primary cell;
the processing of the dedicated control signaling of the UE comprises:
(1) the special control signaling of the UE corresponds to one RLC entity, the RLC entity processes the special control signaling as RLC SDU to obtain RLC PDU, and the RLC PDU is sent to the MAC layer through a corresponding logic channel DCCH.
(2) A downlink scheduling module of an MAC layer in the main cell schedules UE in each cell; when one UE is scheduled, PDSCH resources are allocated to the UE based on the total downlink data amount on each logic channel of the UE; and simultaneously, preferentially scheduling the UE which has downlink data to be transmitted on the DCCH.
(3) When one UE is successfully scheduled, the configuration information of the PDCCH allocated to the UE, the DCI on the PDCCH and the configuration information of the PDSCH are sent to a main cell of the L1 module; meanwhile, the downlink scheduling module indicates the MAC layer of the cell where the UE is located to assemble the MACPDU from the data on each logical channel of the UE; the MAC PDU is assembled by preferentially adopting MAC SDU on a high-priority logic channel, and is TB of a physical layer; and transmitting the MAC PDU to a primary cell of the L1 module through a corresponding transmission channel DL-SCH.
(4) The main cell in the L1 module carries out channel coding and modulation on the DCI on the PDCCH, maps a symbol stream onto the PDCCH, and then sends the PDCCH scrambled by the C-RNTI through a downlink carrier of the main cell; and the primary cell of the L1 module carries out channel coding and modulation on the MAC PDU on the DL-SCH, maps the symbol stream onto the PDSCH, and then sends the PDSCH scrambled by the C-RNTI to the UE through the downlink carrier wave of the primary cell.
Preferably, the processing of the user plane includes:
(1) for a downlink DRB established in one cell, the DRB has corresponding PDCP entities and RLC entities and corresponding logical channels DTCH, transport channels DL-SCH and physical channels PDSCH in the corresponding cell in the L2 module.
(2) The PDCP SDU on the DRB is processed by a corresponding PDCP entity to obtain a PDCP PDU; the corresponding RLC entity processes the PDCP PDU to obtain the RLC PDU; and the RLC PDU is sent to the MAC layer of the cell through a corresponding logical channel DTCH.
(3) The downlink scheduling module of the main cell in the L2 module is responsible for scheduling the UEs of all cells; for the scheduled UE, the downlink scheduling module sends the PDCCH configuration information, the DCI on the PDCCH, and the PDSCH configuration information allocated to the UE to the storage area of the primary cell in the L1 module.
(4) For the scheduled UE, the downlink scheduling module instructs the MAC layer of the cell to which the UE belongs to assemble MAC PDUs from the RLC PDUs on each logical channel corresponding to each DRB and each SRB of the UE, and sends the MAC PDUs to the storage area of the primary cell in the L1 module through the corresponding DL-SCH.
(5) And the main cell of the L1 module carries out channel coding and modulation on the DCI, maps the modulated symbol stream to the PDCCH, and sends the PDCCH scrambled by the C-RNTI to the UE through a downlink carrier wave of the main cell.
(6) And the main cell of the L1 module performs channel coding and modulation on the TB, maps the symbol stream onto the PDSCH, and sends the PDSCH scrambled by the C-RNTI to the UE through a downlink carrier of the main cell.
Preferably, after the step 103, the method may further include: user Equipment (UE) initiates a random access realization process in a main cell; the process comprises the following steps:
step x1, the UE sends MSG1 to the eNodeB.
Specifically, in this step, the UE obtains PRACH resource configuration information on the uplink primary carrier according to the system message of the cell, and sends MSG1 on the uplink primary carrier according to the PRACH resource configuration information (that is, sends PRACH on the uplink primary carrier).
Step x2, the eNodeB sends MSG2 to the UE according to the MSG 1.
Preferably, the step x2 can be implemented by the following steps:
(1) after detecting the PRACH sent by the UE, the primary cell in the L1 module reports the PRACH to the primary cell in the L2 module.
(2) And the uplink scheduling module of the main cell in the L2 module selects PRACH needing response from the PRACH detected in each cell, allocates PUSCH resources for each responded PRACH, and is used for UE (user equipment) sending the corresponding PRACH to send MSG 3. And indicating a downlink scheduling module of the main cell in the L2 module to allocate resources for sending RAR for each PRACH to which MSG3 resources are successfully allocated.
(3) The downlink scheduling module of the main cell in the L2 module allocates PDCCH resources and PDSCH resources to all the responding PRACH according to the indication of the uplink scheduling module of the main cell in the L2 module, is used for sending random access responses of the PRACH, and issues PDCCH configuration information, DCI information on the PDCCH, and PDSCH configuration information to the main cell in the L1 module; the DCI information on the PDCCH is scheduling information of the PDSCH, and is used for the UE to receive the PDSCH.
(4) The MAC layer of the main cell in the L2 module generates a random access response MAC PDU according to the PUSCH resource corresponding to each responded PRACH, and sends the random access response MAC PDU to the main cell in the L1 module; the MAC PDU is TB on PDSCH; the MAC PDU carries relevant information of each responded PRACH; for each responded PRACH, the related information of the PRACH includes: the PRACH comprises a subscript of a preamble, uplink authorization information and a Temporary C-RNTI (radio network Temporary identifier) allocated to UE (user equipment) sending the PRACH, wherein the uplink authorization information is configuration information of a PUSCH (physical uplink shared channel) which is corresponding to the PRACH and bears MSG 3.
(5) The primary cell in the L1 module executes a corresponding processing procedure for the received DCI information on the PDCCH and the received random access response MAC PDU, where the processing procedure includes:
performing channel coding and modulation on the DCI information on the PDCCH, and transmitting a modulated symbol stream to the UE through the PDCCH scrambled by the RA-RNTI on a downlink carrier of a main cell in the L1 module;
and performing channel coding and modulation on the MAC PDU on the PDSCH, and transmitting the modulated symbol stream to the UE through the PDSCH scrambled by the RA-RNTI on a downlink carrier of a main cell in the L1 module.
Step x3, the UE sends MSG3 to the eNodeB according to the MSG 2.
Preferably, step x3 can be implemented by the following method:
after the UE detects a PDCCH scrambled by RA-RNTI on a downlink carrier of a main cell, receiving a PDSCH scrambled by RA-RNTI on the same subframe, and extracting uplink authorization information and Temporary C-RNTI corresponding to the PRACH sent by the UE from the PDSCH; and sending a PUSCH scrambled by the Temporary C-RNTI on an uplink main carrier according to the uplink authorization information, wherein the PUSCH carries MSG3, and the MSG3 is an RRC connection establishment request message.
Step x4, the eNodeB sends MSG4 to the UE according to the MSG 3.
Preferably, step x4 can be implemented by the following steps:
(1) and the primary cell in the L1 module detects the PUSCH scrambled by the Temporary C-RNTI and reports the TB obtained by decoding the detected PUSCH to the primary cell in the L2 module.
(2) And the MAC layer of the main cell in the L2 module extracts MAC SDU from the TB and reports the MAC SDU to a corresponding RLC entity, the RLC entity reports the obtained RLC SDU to the main cell in the L3 module, and the RLC SDU bears the RRC connection establishment request message.
(3) And after the RRC layer of the main cell in the L3 module obtains the RRC connection establishment request message from the RLC SDU, establishing a Signaling Radio Bearer (SRB) for the UE, and sending the RRC connection establishment message serving as the RLC SDU to a corresponding RLC entity of the main cell in the L2 module, wherein the RRC connection establishment message carries the configuration information of the SRB.
(4) A downlink scheduling module of a main cell in the L2 module allocates PDCCH resources and PDSCH resources to RLC SDUs on the RLC entity, and transmits PDCCH configuration information, DCI information on the PDCCH and PDSCH configuration information to the main cell in the L1 module; the DCI information on the PDCCH is scheduling information of the PDSCH; after allocating resources to the RLC entity, a downlink scheduling module of a master cell in the L2 module instructs an MAC layer to assemble MAC PDUs from RLC SDUs on the RLC entity; the MAC PDU is TB on PDSCH; carrying UE context resolution ID MAC CE in the MAC PDU; wherein, the context resolution ID MAC CE is composed of the first 48 bits of the MAC SDU corresponding to MSG 3.
(5) The main cell in the L1 module executes corresponding processing according to the PDCCH configuration information, the DCI information on the PDCCH, the PDSCH configuration information and the MAC PDU assembled by the RLC SDU; wherein the processing comprises: carrying out channel coding and modulation on the DCI information on the PDCCH, and sending the modulated symbol stream to the UE through the PDCCH scrambled by the Temporary C-RNTI; and carrying out channel coding and modulation on the TB on the PDSCH, and sending the modulated symbol stream to the UE through the PDSCH scrambled by the Temporary C-RNTI.
Step x5, the UE processes the received MSG 4.
Preferably, step x5 can be implemented by the following steps:
(1) the UE receives the PDCCH scrambled by the Temporary C-RNTI on the uplink main carrier, and receives the PDSCH scrambled by the Temporary C-RNTI on the same subframe; and performing MAC layer processing on the TB of the PDSCH to obtain MAC SDU and UE resolution ID MAC CE.
(2) If the information in the UE resolution ID MAC CE is different from the first 48 bits in the MAC SDU corresponding to the MSG3 sent by the UE, the MAC layer of the UE discards the obtained MAC SDU, and the current random access process fails; and if the information in the UE resolution ID MAC CE is the same as the first 48 bits in the MAC SDU corresponding to the MSG3 sent by the UE, the MAC layer of the UE sends the MAC SDU to a corresponding RLC entity.
(3) And the RLC entity reports the RLC SDU obtained by processing to an RRC layer.
(4) The RRC layer extracts RRC connection establishment information from RLC SDU; and executing corresponding configuration according to the RRC connection establishment message, setting the C-RNTI as a Temporary C-RNTI, and deleting the Temporary C-RNTI.
(5) The RRC layer generates an RRC connection establishment completion message, the RRC connection establishment completion message carries an NAS message, and the NAS message comprises service application information and UE capability information; the capability information of the UE at least comprises: frequency band information of a specific FDD/TDD cell supported by the UE.
(6) The UE sends SR through a scheduling request SR resource on a distributed PUCCH on an uplink main carrier to apply for the uplink resource and monitor the PDCCH scrambled by the C-RNTI; and if the corresponding PDCCH is detected, the UE sends an RRC connection establishment completion message to the main cell on the uplink carrier wave of the main cell according to the scheduling information of the PUSCH on the PDCCH.
Preferably, after the step 103, the method may further include: the primary cell of the L3 module determines, according to the frequency band information of the special FDD cell supported by the UE, extracted from the UE capability message, an uplink carrier supported by the UE in each uplink carrier in the special FDD cell, and after each uplink carrier supported by the UE includes at least one uplink secondary carrier and the L3 module determines to configure one of the uplink secondary carriers to the UE, the primary cell of the L3 module triggers switching of the UE from the uplink primary carrier to the uplink secondary carrier in the uplink direction by sending an RRC connection reconfiguration message to the UE. Specifically, the foregoing handover procedure may be implemented by the following method:
(1) the main cell of the L3 module acquires each uplink auxiliary carrier supported by the UE according to the capability information reported by the UE, and determines to switch the uplink of the UE to one of the uplink auxiliary carriers; wherein the capability information comprises frequency band information of a special FDD/TDD cell supported by the UE.
(2) The primary cell of the L3 module binds the UE with the corresponding secondary cell in the L3 module; wherein the uplink carrier of the secondary cell is an uplink secondary carrier to which the uplink of the UE is switched, which is determined by the primary cell of the L3 module; all the secondary cells in the L3 module do not perform downlink processing, and the downlink processing of the corresponding secondary cell is performed in the primary cell, so that the downlink resource configuration of the UE in the secondary cell still uses the downlink resource configuration of the UE in the existing primary cell, and only the resource configurations need to be bound to the secondary cell where the UE is located. However, the uplink resources need to be reallocated to the UE on the uplink carrier of the secondary cell, which includes: PRACH resources, PUCCH resources, and SRS resources; for each DRB and each SRB previously established by the UE in the L3 primary cell, binding the configuration information of the primary cell carried in the L3 module and the configuration information of the primary cell in the L2 module with the corresponding secondary cells in the L3 module and the L2 module, respectively, that is: the configuration information of the bearers is changed into the bearers established by the secondary cell through the binding with the secondary cell.
(3) And the main cell of the L3 module sends the bandwidth of the corresponding uplink auxiliary carrier and the configuration information of the uplink and downlink resources allocated to the UE through an RRC connection reconfiguration message.
(4) And the UE refreshes the uplink resource configuration information and the downlink resource configuration information of the UE side according to the uplink and downlink resource configuration information in the RRC connection reconfiguration message, and returns an RRC connection reconfiguration completion message to the main cell on the uplink main carrier of the main cell.
(5) After receiving the RRC reconfiguration complete message, the primary cell of the L3 module releases the resource configuration information of the UE in the primary cell; after that, the uplink transmission of the UE is performed on the uplink secondary carrier, and the downlink reception is still performed on the downlink carrier of the primary cell.
Preferably, after the step 103, the method may further include: the processing procedure of uplink and downlink scheduling specifically includes the following steps:
the downlink scheduling module of the MAC layer of the primary cell in the L2 module implements a downlink scheduling process, which includes:
(1) and allocating PDCCH and PDSCH resources for the PRACH needing to be responded in the main cell and all the auxiliary cells according to the indication of the uplink scheduling module so as to send RAR.
(2) Allocating PDCCH and PDSCH resources for the common control information of the special FDD/TDD cell; the common control information of the cell includes: MIB, SIB and paging message; these information are allocated resources separately and ensure that the MIB, SIB and paging messages cannot be multiplexed together.
(3) And allocating PDCCH and PDSCH resources for each UE in the main cell and each auxiliary cell so as to transmit data on each downlink DRB and data on a downlink SRB of the UE.
The uplink scheduling module of the MAC layer of the primary cell in the L2 module implements an uplink scheduling process, which includes:
(1) and determining the PRACH needing response from the PRACHs detected in the primary cell and all the secondary cells, and respectively allocating PDCCH resources and PUSCH resources to the PRACHs so as to facilitate the corresponding UE to transmit MSG 3.
(2) Respectively allocating PDCCH (physical Downlink control channel) and PUSCH (physical uplink shared channel) resources for each UE in each cell; the UE in different cells is positioned on different uplink carriers; when the UE is scheduled, the PUSCH resource is allocated to the UE according to the bandwidth of the uplink carrier where the UE is located, and the scheduling information carries the uplink carrier identification.
It should be noted that a specific TDD cell includes one TDD carrier and 1 or more uplink carriers. The TDD carrier is the only carrier used for uplink and downlink transmission in the special cell, and is the downlink carrier and the uplink primary carrier, and all other uplink carriers are uplink secondary carriers of the cell. The above method is also applicable to a particular TDD cell.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (17)

1. An implementation method of an LTE cell, comprising:
a. for a special frequency division duplex FDD cell, an operation management center OMC or a local maintenance terminal LMT decomposes the FDD cell into a main cell and at least one auxiliary cell; the special FDD cell is configured with a pair of FDD carriers and at least one uplink auxiliary carrier, and the main cell is formed by the pair of FDD carriers of the FDD cell; for each secondary cell, the uplink carrier of the secondary cell is an uplink secondary carrier of the FDD cell, and the downlink carrier of the secondary cell is a downlink carrier of the pair of FDD carriers;
b. when OMC or LMT configures the FDD cell, configuring the primary cell and the secondary cell in a cell configuration message correspondingly;
c. when the base station eNodeB receives the cell configuration message, after knowing that the currently configured cell is a special FDD cell according to the cell type information element IE carried in the cell configuration message, according to the configuration in the message, respectively establishing an FDD primary cell and at least one secondary cell in the modules L3, L2, and L1, associating the primary cell established by each module with each secondary cell established by the same module, associating the primary cell established by the module L3 with the primary cell established by the module L2 and the primary cell established by the module L1, and associating each secondary cell established by the module L3 with the corresponding secondary cell established by the module L2 and the module L1.
2. The method of claim 1, wherein the configuring the primary cell and the secondary cell in the cell configuration message respectively comprises:
setting the cell type IE in the cell configuration message to an IE value used for indicating that the cell type is a special FDD cell;
in the cell configuration message, indicating a pair of FDD carriers of the primary cell by using carrier configuration information IE;
adding secondary cell configuration information IE in the cell configuration message, wherein the secondary cell configuration information IE comprises a secondary cell number IE and carrier configuration information IE of each secondary cell; the carrier configuration information IE of each secondary cell is used for indicating an uplink carrier and a downlink carrier of one secondary cell;
in the cell configuration message, configuring a physical layer cell ID of the FDD cell, a physical layer cell ID of the primary cell and a physical layer cell ID of each secondary cell by using a physical layer cell identity (ID IE); wherein the physical layer cell ID of each cell is the value indicated by the physical layer cell IE.
3. The method of claim 2, wherein step c comprises:
when the L3 module of the eNodeB receives a cell configuration message, after knowing that a currently configured cell is a special FDD cell according to the cell type information element IE of the cell configuration message, the L3 module creates 1+ N cell instances for the cell, which correspond to a primary cell and N secondary cells, respectively; wherein, the N is the number of the secondary cells configured by the number of the secondary cells IE in the cell configuration message;
the eNodeB configures a pair of FDD carriers of the main cell according to the carrier configuration information IE in the cell configuration message, and configures uplink carriers and downlink carriers of the auxiliary cells according to the carrier configuration information IE of each auxiliary cell; wherein the configuration information of each carrier includes: the frequency point and bandwidth of the carrier, for the downlink carrier, the configuration information further includes: for the uplink carrier, the configuration information further includes: the configuration information of each uplink physical channel on the carrier wave comprises the PRACH configuration information of a packet random access channel, the PUCCH configuration information of a physical uplink control channel and the SRS configuration information of a sounding reference signal; the transmission power of each downlink physical channel and each downlink physical signal on the downlink carrier of each secondary cell is configured to be 0;
the L3 module binds the established primary cell and N secondary cells, and configures the same physical layer cell ID for the primary cell and the N secondary cells, where the physical layer cell ID is obtained from a physical layer cell ID IE in the cell configuration message;
the L3 module configures 1+ N cells for the L2 module, where the 1+ N cells are respectively in one-to-one correspondence with the one primary cell and the N secondary cells in the L3 module, and are respectively a primary cell and N secondary cells in the L2 module; the L2 module creates a cell instance for the 1+ N cells respectively, and binds each cell with the corresponding cell instance;
the L2 module configures an uplink scheduling module and a downlink scheduling module for each cell instance; the configuration information of the uplink scheduling module comprises the bandwidth of an uplink carrier; the configuration information of the downlink scheduling module comprises the bandwidth of a downlink carrier; for a cell instance corresponding to each auxiliary cell, presetting the configured uplink scheduling module and the configured downlink scheduling module to be in a non-invoked state; for the cell instance corresponding to the main cell, the configured uplink scheduling module and downlink scheduling module are used for executing uplink scheduling and downlink scheduling of the 1+ N cells;
the L3 module configures 1+ N cells for the L1 module, where the 1+ N cells are respectively in one-to-one correspondence with the one primary cell and the N secondary cells in the L3 module, and are respectively a primary cell and N secondary cells in the L1 module; the L3 module configures the physical layer cell ID of the 1+ N cells to a value corresponding to the physical layer cell ID IE in the cell configuration message; for the FDD cell, the L3 module configures the transmit power of each physical channel and physical signal on the downlink carrier in each secondary cell in the L1 module to 0; the L1 module creates a corresponding cell instance for each cell configured by the L3 module, and 1+ N cells of the L1 module are used to process uplink baseband signals from an uplink primary carrier and N uplink secondary carriers, respectively; the primary cell of the L1 module is responsible for sending downlink physical channels and physical signals of the primary cell and the N secondary cells, and the transmission power of each physical channel and physical signal on the downlink carrier of each secondary cell of the L1 module is set to 0.
4. The method of claim 1, wherein after the step c, further comprising: the eNodeB executes an uplink processing process of the FDD cell; the uplink processing process comprises the following steps: and the main cell and each auxiliary cell in the L1 module respectively process baseband signals of PRACH, PUCCH and PUSCH on the uplink main carrier and each uplink auxiliary carrier, and respectively send the obtained data to the corresponding storage areas of the main cell and each auxiliary cell of the L2 module, wherein the data comprises detected uplink control information UCI on the PRACH and PUCCH and a transmission block TB on the PUSCH.
5. The method of claim 4, wherein the upstream processing further comprises: the L2 module includes the processing of the medium access control MAC layer, the processing of the radio link layer control RLC, and the processing of the packet data convergence protocol PDCP layer in the primary cell instance.
6. The method of claim 5, wherein the processing at the MAC layer comprises: processing of a PRACH, processing of a PUCCH and processing of a PUSCH;
the processing of the PRACH comprises:
the uplink scheduling module of the MAC layer determines PRACH needing response in the PRACH detected in the storage area of each cell in the L2 module, the PRACH needing response is the PRACH detected in the same uplink subframe, and the uplink scheduling module of the MAC layer allocates PDCCH and PUSCH resources for UE to send MSG3 to each PRACH needing response; for each PRACH to which MSG3 resources are successfully allocated, the uplink scheduling module of the MAC layer instructs the downlink scheduling module to allocate PDCCH and PDSCH resources for transmitting RAR to the PRACH;
the downlink scheduling module of the MAC layer allocates PDCCH and PDSCH resources for sending RAR according to the indication of the uplink scheduling module of the MAC layer; if the RAR resources are successfully allocated, sending RAR resource configuration information and MSG3 resource configuration information of each PRACH to the main cell of the L1 module;
the RAR resource configuration information comprises PDCCH configuration information used for sending a random access response, DCI on the PDCCH and PDSCH configuration information;
the MSG3 resource configuration information of each PRACH includes PDCCH configuration information for transmitting MSG3, DCI on PDCCH, and TB on PDSCH in the RAR resource configuration information; the TB on the PDSCH in the RAR resource configuration information consists of a training sequence Preamble subscript corresponding to each responded PRACH, uplink authorization information and a Temporary C-RNTI; the uplink authorization information corresponding to each responded PRACH is scheduling information of a PUSCH (physical uplink shared channel) carrying MSG3 sent by UE (user equipment) sending the responded PRACH, and the Temporary C-RNTI is used for identifying the UE sending MSG 3;
the processing of the PUCCH includes:
UCI on PUCCH is used for carrying ACK/NACK information and/or channel quality indication CQI information;
when UCI on PUCCH carries ACK/NACK information, if the information is NACK information, the MAC layer indicates the downlink scheduling module to be TB on PDSCH which is not correctly received by UE, and PDSCH resources for retransmitting the TB are scheduled; if the information is ACK information, the MAC layer sets a hybrid automatic repeat request HARQ process occupied by the TB on the corresponding PDSCH to be idle, and the process can be used for transmitting the subsequent TB;
when UCI on PUCCH carries CQI information, when a downlink scheduling module performs downlink scheduling on UE of each cell, reading the CQI information of the UE stored by an MAC layer in the cell to which the corresponding UE belongs, and scheduling the UE based on the wireless channel quality determined by the CQI information;
the processing of the PUSCH comprises:
when the decoding of the TB on the PUSCH is correct, the MAC layer sets the corresponding HARQ process to be idle and analyzes the TB to obtain an MAC service data unit MAC SDU or/and an MAC control unit MAC CE; the MAC layer analyzes the MAC CE to obtain control information from corresponding UE and stores the information; the MAC layer sends the MAC SDU to a corresponding RLC entity of the RLC layer through a corresponding logical channel;
when the decoding of the TB on the PUSCH is wrong, if the retransmission times of the TB do not reach the preset maximum retransmission times and the self-adaptive retransmission is adopted, the MAC layer instructs an uplink scheduling module to schedule PDSCH resources for the TB so as to retransmit the TB;
when the TB decoding on the PUSCH is correct, the MAC layer generates ACK information; otherwise, the MAC layer generates NACK information; the MAC layer sends ACK/NACK information of a TB on a PUSCH and a resource subscript of a physical hybrid automatic repeat request indicator channel PHICH which feeds back the information to a primary cell of the L1 module;
the main cell of the L1 module encodes and modulates ACK/NACK information, and then feeds back the modulated information to the UE through a corresponding PHICH channel according to the PHICH resource subscript;
the RLC layer processing includes:
the corresponding RLC entity of the RLC layer processes the MAC SDU from the corresponding logical channel to obtain the RLC SDU; if the RLC SDU comes from the control channel, the RLC SDU is an RRC message, and the RLC entity uploads the corresponding RLC SDU to an RRC layer;
if the RLC SDU comes from a service channel, the RLC entity uploads the corresponding RLC SDU to a corresponding PDCP entity in a PDCP layer;
the processing of the PDCP layer includes:
a corresponding PDCP entity in the PDCP layer processes RLC SDUs from a corresponding RLC entity to obtain PDCP SDUs, and the PDCP SDUs are transmitted to a service gateway S-GW through a corresponding evolved packet system EPS bearer on an S1 interface;
the processing of the RRC layer comprises:
the RRC layer processes the corresponding RRC message and executes the corresponding process according to the type of the message.
7. The method of claim 1, wherein after the step c, further comprising: the eNodeB executes a downlink processing process of the FDD cell; the downlink processing process comprises the following steps: processing of a control plane and processing of a user plane;
the processing of the control plane includes: processing a master information block MIB, a system information block SIB, a paging message and a UE-specific control signaling; wherein, the processing procedures of the MIB, the SIB and the paging message comprise:
the MIB, SIB and paging messages correspond to different RLC entities in the primary cell in the L2 module; the primary cell in the L3 module places MIB, SIB and paging messages in different locations in the storage area of the primary cell in the L2 module;
the RLC entity corresponding to the MIB/SIB/paging message in the primary cell in the L2 module takes out the MIB/SIB/paging message from the corresponding position in the storage area of the primary cell in the L2 module, performs corresponding processing to obtain RLC PDU, and sends the RLC PDU to the MAC layer of the cell through a corresponding logical channel; MIB and SIB correspond to different broadcast control channels BCCH, the paging message corresponds to paging control channel PCCH;
the BCCH corresponding to the MIB is mapped to BCH and finally sent through a physical broadcast channel PBCH; the time frequency resource occupied by PBCH is fixed; BCCH and PCCH for bearing each SIB are mapped to different downlink shared channels DL-SCH and finally transmitted through different PDSCHs; the MAC layer of the primary cell acquires the MIB from the corresponding BCCH and sends the MIB to the primary cell of the L1 module through a broadcast channel BCH;
a downlink scheduling module of an MAC layer in a main cell executes a processing process, which comprises the following steps: the downlink scheduling module allocates PDCCH and PDSCH resources to BCCH carrying SIB and PCCH carrying paging message respectively, and issues the configuration information of PDCCH, DCI information on PDCCH and configuration information of PDSCH to the main cell of the L1 module, wherein the DCI information is the scheduling information of PDSCH; after scheduling resources for BCCH and PCCH, the downlink scheduling module indicates the MAC layer of the main cell to assemble MAC PDU by RLC PDU from the BCCH/PCCH; sending MAC PDU on different logic channels to a primary cell of the L1 module through different DL-SCH;
for PDCCH and PDSCH corresponding to BCCH, a main cell in the L1 module performs channel coding and modulation on DCI on the PDCCH, when the DCI is subjected to channel coding, the DCI obtains 16-bit CRC, the CRC is scrambled by using SI-RNTI, then the subsequent processing of channel coding and symbol modulation are executed, a symbol stream is mapped onto the PDCCH, and then the PDCCH scrambled by the system information-radio network temporary identifier SI-RNTI is sent through a downlink carrier of the main cell; the primary cell of the L1 module performs channel coding and modulation on the MAC PDU on the DL-SCH, when the MAC PDU is subjected to channel coding, the MAC PDU obtains 16-bit CRC, the CRC is scrambled by using SI-RNTI, then the subsequent processing of the channel coding and the symbol modulation are executed, the symbol stream is mapped to the PDSCH, and then the PDSCH scrambled by the SI-RNTI is sent to the UE through a downlink carrier of the primary cell;
for PDCCH and PDSCH corresponding to PCCH, a main cell in the L1 module performs channel coding and modulation on DCI on the PDCCH, when the DCI is subjected to channel coding, the DCI obtains 16-bit CRC, the CRC is scrambled by using P-RNTI, then the subsequent processing of channel coding and symbol modulation are executed, a symbol stream is mapped onto the PDCCH, and then the PDCCH scrambled by paging information-system network temporary identifier P-RNTI is sent through a downlink carrier of the main cell; the primary cell of the L1 module performs channel coding and modulation on the MAC PDU on the DL-SCH, when the channel coding is performed on the MAC PDU, the MAC PDU obtains 16-bit CRC, the CRC is scrambled by P-RNTI, then the subsequent processing of the channel coding and the symbol modulation are executed, the symbol stream is mapped to the PDSCH, and then the PDSCH scrambled by the P-RNTI is sent to the UE through the downlink carrier wave of the primary cell;
the processing of the dedicated control signaling of the UE comprises:
the special control signaling of the UE corresponds to an RLC entity, the RLC entity processes the special control signaling as RLC SDU to obtain RLC PDU, and the RLC PDU is sent to an MAC layer through a corresponding logic channel DCCH;
a downlink scheduling module of an MAC layer in the main cell schedules UE in each cell; when one UE is scheduled, PDSCH resources are allocated to the UE based on the total downlink data amount on each logic channel of the UE; at the same time, UE with downlink data to be transmitted on a DCCH is scheduled preferentially;
when one UE is successfully scheduled, the configuration information of the PDCCH allocated to the UE, the DCI on the PDCCH and the configuration information of the PDSCH are sent to a main cell of the L1 module; meanwhile, the downlink scheduling module indicates the MAC layer of the cell where the UE is located to assemble MAC PDUs from the data on each logic channel of the UE; the method comprises the steps that MAC SDU on a high-priority logic channel is preferentially adopted to assemble MAC protocol data unit MAC PDU, and the MAC PDU is TB of a physical layer; transmitting the MAC PDU to a primary cell of the L1 module through a corresponding transmission channel DL-SCH;
the main cell in the L1 module carries out channel coding and modulation on the DCI on the PDCCH, maps a symbol stream onto the PDCCH, and then sends the PDCCH for detecting the scrambling of the cell-radio network temporary identifier C-RNTI through a downlink carrier wave of the main cell; the primary cell of the L1 module carries out channel coding and modulation on the MAC PDU on the DL-SCH, maps a symbol stream onto the PDSCH, and then sends the PDSCH scrambled by the C-RNTI to the UE through a downlink carrier wave of the primary cell;
the processing of the user plane comprises:
for a downlink DRB established in a cell, the DRB has a corresponding PDCP entity and RLC entity and a corresponding logical channel DTCH, transport channel DL-SCH, and physical channel PDSCH in a corresponding cell in the L2 module;
the PDCP SDU on the DRB is processed by a corresponding PDCP entity to obtain a PDCP PDU; the corresponding RLC entity processes the PDCP PDU to obtain the RLC PDU; the RLC PDU is sent to an MAC layer of a cell through a corresponding logical channel DTCH;
the downlink scheduling module of the main cell in the L2 module is responsible for scheduling the UEs of all cells; for the scheduled UE, the downlink scheduling module sends the PDCCH configuration information, the DCI on the PDCCH and the PDSCH configuration information which are allocated to the UE to a storage area of a main cell in the L1 module;
for the scheduled UE, the downlink scheduling module indicates the MAC layer of the cell to which the UE belongs to assemble MAC PDUs from RLC PDUs on each logical channel corresponding to each DRB and each SRB of the UE, and sends the MAC PDUs to a storage area of a primary cell in an L1 module through corresponding DL-SCH;
the main cell of the L1 module carries out channel coding and modulation on the DCI, maps a modulated symbol stream onto the PDCCH, and sends the PDCCH scrambled by the C-RNTI to the UE through a downlink carrier wave of the main cell;
and the main cell of the L1 module performs channel coding and modulation on the TB, maps the symbol stream onto the PDSCH, and sends the PDSCH scrambled by the C-RNTI to the UE through a downlink carrier of the main cell.
8. The method of claim 1, wherein after the step c, further comprising: user Equipment (UE) initiates a random access realization process in a main cell; the process comprises the following steps:
x1, UE sends MSG1 to the eNodeB;
x2, the eNodeB transmitting to the UE an MSG2 in accordance with the MSG 1;
x3, the UE transmitting to the eNodeB an MSG3 according to the MSG 2;
x4, the eNodeB transmitting to the UE an MSG4 in accordance with the MSG 3;
x5, the UE processing the received MSG 4.
9. The method according to claim 8, wherein the step x1 comprises:
and the UE acquires PRACH resource configuration information on the uplink main carrier according to the system message of the cell, and sends MSG1 on the uplink main carrier according to the PRACH resource configuration information.
10. The method according to claim 8, wherein the step x2 comprises:
after detecting the PRACH sent by the UE, the primary cell in the L1 module reports the PRACH to the primary cell in the L2 module;
the uplink scheduling module of the main cell in the L2 module selects PRACH which needs to be responded from the PRACH detected in each cell, allocates PUSCH resources for each PRACH which needs to be responded, is used for the UE which sends the corresponding PRACH to send MSG3, and instructs the downlink scheduling module of the main cell in the L2 module to allocate resources for sending RAR for each PRACH which has successfully allocated MSG3 resources;
the downlink scheduling module of the main cell in the L2 module allocates PDCCH resources and PDSCH resources to all the responding PRACH according to the indication of the uplink scheduling module of the main cell in the L2 module, is used for sending random access responses of the PRACH, and issues PDCCH configuration information, DCI information on the PDCCH, and PDSCH configuration information to the main cell in the L1 module; the DCI information on the PDCCH is scheduling information of the PDSCH, and is used for the UE to receive the PDSCH;
the MAC layer of the main cell in the L2 module generates a random access response MAC PDU according to the PUSCH resource corresponding to each responded PRACH, and sends the random access response MAC PDU to the main cell in the L1 module; the MAC PDU is TB on PDSCH; the MAC PDU carries relevant information of each responded PRACH; for each responded PRACH, the related information of the PRACH includes: subscript of preamble adopted by the PRACH, uplink authorization information and Temporary C-RNTI allocated to UE sending the PRACH, wherein the uplink authorization information is configuration information of PUSCH which bears MSG3 and corresponds to the PRACH;
the primary cell in the L1 module executes a corresponding processing procedure for the received DCI information on the PDCCH and the received random access response MAC PDU, where the processing procedure includes:
performing channel coding and modulation on the DCI information on the PDCCH, and transmitting a modulated symbol stream to the UE through the PDCCH scrambled by the RA-RNTI on a downlink carrier of a main cell in the L1 module;
and performing channel coding and modulation on the MAC PDU on the PDSCH, and transmitting the modulated symbol stream to the UE through the PDSCH scrambled by the RA-RNTI on a downlink carrier of a main cell in the L1 module.
11. The method according to claim 8, wherein the step x3 comprises:
after the UE detects a PDCCH scrambled by RA-RNTI on a downlink carrier of a main cell, receiving a PDSCH scrambled by RA-RNTI on the same subframe, and extracting uplink authorization information and Temporary C-RNTI corresponding to the PRACH sent by the UE from the PDSCH; and sending a PUSCH scrambled by the Temporary C-RNTI on an uplink main carrier according to the uplink authorization information, wherein the PUSCH carries MSG3, and the MSG3 is an RRC connection establishment request message.
12. The method according to claim 8, wherein the step x4 comprises:
the primary cell in the L1 module detects the PUSCH scrambled by the Temporary C-RNTI and reports the TB obtained by decoding the detected PUSCH to the primary cell in the L2 module;
the MAC layer of the main cell in the L2 module extracts MAC SDU from the TB and reports the MAC SDU to a corresponding RLC entity, the RLC entity reports the obtained RLC SDU to the main cell in the L3 module, and the RLC SDU carries RRC connection establishment request information;
after the RRC layer of the primary cell in the L3 module obtains the RRC connection establishment request message from the RLC SDU, establish a signaling radio bearer SRB for the UE, and send the RRC connection establishment message as the RLC SDU to a corresponding RLC entity of the primary cell in the L2 module, where the RRC connection establishment message carries configuration information of the SRB;
a downlink scheduling module of a main cell in the L2 module allocates PDCCH resources and PDSCH resources to RLC SDUs on the RLC entity, and issues PDCCH configuration information, DCI information on the PDCCH, and PDSCH configuration information to the main cell in the L1 module; the DCI information on the PDCCH is scheduling information of the PDSCH; after allocating resources to the RLC entity, a downlink scheduling module of a master cell in the L2 module instructs an MAC layer to assemble MAC PDUs from RLC SDUs on the RLC entity; the MAC PDU is TB on PDSCH; carrying UE context resolution ID MAC CE in the MAC PDU; wherein, the context resolution ID MAC CE is composed of the first 48 bits of the MAC SDU corresponding to the MSG 3;
the main cell in the L1 module executes corresponding processing according to the PDCCH configuration information, the DCI information on the PDCCH, the PDSCH configuration information and the MAC PDU assembled by the RLC SDU; wherein the processing comprises: carrying out channel coding and modulation on the DCI information on the PDCCH, and sending the modulated symbol stream to the UE through the PDCCH scrambled by the Temporary C-RNTI; and carrying out channel coding and modulation on the TB on the PDSCH, and sending the modulated symbol stream to the UE through the PDSCH scrambled by the Temporary C-RNTI.
13. The method according to claim 8, wherein the step x5 comprises:
the UE receives the PDCCH scrambled by the Temporary C-RNTI on the uplink main carrier, and receives the PDSCH scrambled by the Temporary C-RNTI on the same subframe; processing an MAC layer on TB of the PDSCH to obtain MAC SDU and UE resolution ID MAC CE;
if the information in the UE resolution ID MAC CE is different from the first 48 bits in the MAC SDU corresponding to the MSG3 sent by the UE, the MAC layer of the UE discards the obtained MAC SDU, and the current random access process fails; if the information in the UE resolution ID MAC CE is the same as the first 48 bits in the MAC SDU corresponding to the MSG3 sent by the UE, the MAC layer of the UE sends the MAC SDU to a corresponding RLC entity;
the RLC entity reports the RLC SDU obtained by processing to an RRC layer;
the RRC layer extracts RRC connection establishment information from RLC SDU; executing corresponding configuration according to the RRC connection establishment message, setting the C-RNTI as a Temporary C-RNTI, and deleting the Temporary C-RNTI;
the RRC layer generates an RRC connection establishment completion message, the RRC connection establishment completion message carries an NAS message, and the NAS message comprises service application information and UE capability information; the capability information of the UE at least comprises: frequency band information of a special FDD/TDD cell supported by the UE;
the UE sends SR through a scheduling request SR resource on a distributed PUCCH on an uplink main carrier to apply for the uplink resource and monitor the PDCCH scrambled by the C-RNTI; and if the corresponding PDCCH is detected, the UE sends an RRC connection establishment completion message to the main cell on the uplink carrier wave of the main cell according to the scheduling information of the PUSCH on the PDCCH.
14. The method of claim 1, wherein after the step c, further comprising:
y, the primary cell of the L3 module determines, according to the frequency band information of the special FDD cell supported by the UE, extracted from the UE capability message, an uplink carrier supported by the UE in each uplink carrier in the special FDD cell, and after each uplink carrier supported by the UE includes at least one uplink secondary carrier and the L3 module determines to configure one of the uplink secondary carriers to the UE, the primary cell of the L3 module triggers to switch the UE from the uplink primary carrier to the uplink secondary carrier in the uplink direction by sending an RRC connection reconfiguration message to the UE.
15. The method of claim 14, wherein step y comprises:
the main cell of the L3 module acquires each uplink auxiliary carrier supported by the UE according to the capability information reported by the UE, and determines to switch the uplink of the UE to one of the uplink auxiliary carriers; the capability information comprises frequency band information of a special FDD/TDD cell supported by the UE;
the primary cell of the L3 module binds the UE with the corresponding secondary cell in the L3 module; wherein the uplink carrier of the secondary cell is an uplink secondary carrier to which the uplink of the UE is switched, which is determined by the primary cell of the L3 module; reallocating uplink resources to the UE on the uplink carrier of the secondary cell, including: PRACH resources, PUCCH resources, and SRS resources; for each DRB and each SRB previously established by the UE in the L3 primary cell, binding the configuration information of the primary cell carried in the L3 module and the configuration information of the primary cell in the L2 module with the corresponding secondary cells in the L3 module and the L2 module, respectively;
the main cell of the L3 module sends the bandwidth of the corresponding uplink auxiliary carrier and the configuration information of the uplink and downlink resources allocated to the UE through an RRC connection reconfiguration message;
the UE refreshes the uplink resource configuration information and the downlink resource configuration information of the UE side according to the uplink and downlink resource configuration information in the RRC connection reconfiguration message, and returns an RRC connection reconfiguration completion message to the main cell on an uplink main carrier of the main cell;
after receiving the RRC reconfiguration complete message, the primary cell of the L3 module releases the resource configuration information of the UE in the primary cell; after that, the uplink transmission of the UE is performed on the uplink secondary carrier, and the downlink reception is still performed on the downlink carrier of the primary cell.
16. The method of claim 1, wherein after the step c, further comprising:
the downlink scheduling module of the MAC layer of the primary cell in the L2 module implements a downlink scheduling process, which includes:
allocating PDCCH (physical Downlink control channel) and PDSCH (physical Downlink shared channel) resources to PRACH (physical random Access channel) needing to be responded in the main cell and all auxiliary cells according to the indication of the uplink scheduling module so as to send RAR (random access request);
allocating PDCCH and PDSCH resources for the common control information of the special FDD/TDD cell; the common control information of the cell includes: MIB, SIB and paging message; allocating resources to the information respectively and ensuring that the MIB, the SIB and the paging message cannot be multiplexed together;
and allocating PDCCH and PDSCH resources for each UE in the main cell and each auxiliary cell so as to transmit data on each downlink DRB and data on a downlink SRB of the UE.
17. The method of claim 1, wherein after the step c, further comprising:
the uplink scheduling module of the MAC layer of the primary cell in the L2 module implements an uplink scheduling process, which includes:
determining the PRACH needing response in the PRACH detected in the main cell and all the auxiliary cells, and respectively allocating PDCCH resources and PUSCH resources to the PRACH so as to facilitate the corresponding UE to send MSG 3;
respectively allocating PDCCH (physical Downlink control channel) and PUSCH (physical uplink shared channel) resources for each UE in each cell; the UE in different cells are positioned on different uplink carriers; when the UE is scheduled, the PUSCH resource is allocated to the UE according to the bandwidth of the uplink carrier where the UE is located, and the scheduling information carries the uplink carrier identification.
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