WO2017215437A1 - 一种进行随机接入的方法和设备 - Google Patents

一种进行随机接入的方法和设备 Download PDF

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Publication number
WO2017215437A1
WO2017215437A1 PCT/CN2017/086213 CN2017086213W WO2017215437A1 WO 2017215437 A1 WO2017215437 A1 WO 2017215437A1 CN 2017086213 W CN2017086213 W CN 2017086213W WO 2017215437 A1 WO2017215437 A1 WO 2017215437A1
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Prior art keywords
random access
network side
information
message
terminal
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English (en)
French (fr)
Inventor
贺媛
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and device for performing random access.
  • the contention of the random access means that the eNB (Evolved Base Station) does not allocate a dedicated Preamble (preamble) code for the UE (terminal), but the random access initiated by the UE and randomly selected by the Preamble code.
  • the competitive random access procedure is divided into four steps, as shown in Figure 1A. Each step is called a message, and these four steps are called Msg1 to Msg4.
  • Msg1 Send Preamble code.
  • the eNB is configured to configure the Preamble code and the PRACH (Physical Random Access Channel) resource for transmitting the Preamble code, and broadcast the configuration to the UE camped in the cell through SI (System Information).
  • SI System Information
  • Msg2 Random access response.
  • the eNB sends Msg2 in the random access response window
  • the UE receives the Msg2 in the random access response window. If the reception fails, the UE determines the time of the next random access according to the backoff delay parameter, and selects the random access resource to initiate the next random access.
  • Msg3 The first scheduled transmission.
  • the UE transmits Msg3 on the allocated uplink resource.
  • Msg4 contains information related to contention resolution. After receiving the UE, the UE considers that the contention resolution is successful.
  • the UE does not receive the Msg4 when the contention resolution timer expires. If the contention fails to be resolved, the UE determines the time of the next random access according to the backoff delay parameter, and selects the random access resource to initiate the next random access.
  • the non-contention random access is a random access initiated by the UE using the specified Preamble code on the designated PRACH channel resource according to the eNB indication.
  • Non-contention random access is divided into three steps, as shown in Figure 1B. Among them, these three steps are called Msg0 to Msg2.
  • Msg0 Random access indication.
  • the eNB actively requests the designated UE to initiate a random access procedure when the handover and downlink data arrive.
  • Msg0 includes a Preamble code and a PRACH channel resource used by the UE to initiate non-contention random access.
  • Msg1 Send Preamble code.
  • the UE initiates random access with the specified Preamble code on the PRACH channel resource specified by the eNB. If multiple PRACH channel resources are specified, the UE randomly selects a designated PRACH channel resource for carrying Msg1 in the first available subframe with PRACH channel resources.
  • Msg2 Random access response.
  • Msg2 The format and content of Msg2 is the same as competing random access.
  • the UE If the UE does not receive the random access response in the random access response window, it determines that the non-contention random access fails, and initiates random access with the specified Preamble code on the next designated PRACH channel resource, which is not subject to the backoff parameter. limit.
  • the access information of the preamble code of each cell is different.
  • the UE initiates a random access procedure according to the indication of the system information when camping in a certain cell, and only the corresponding cell can receive and feedback.
  • the coverage of each cell is relatively small.
  • the random access information in the system information of the cell is frequently read, resulting in power consumption and complexity of the UE.
  • the coverage of each cell is relatively small, and the UE frequently reads the random access information in the system information of the cell when the UE moves, resulting in power consumption and complicated processing of the UE. .
  • the embodiments of the present invention provide a method and a device for performing random access, which are used to solve the problem that the current coverage of the cell is relatively small, and the UE is frequently moving when the UE is moving.
  • the random access information in the system information of the cell is read, which causes the UE to consume power and handle complicated problems.
  • the network side device determines the same specific random access information as one or more other network side devices
  • the network side device sends the specific random access information to the terminal, so that the terminal accesses through the random access information.
  • the network side device determines the same random access information as the one or more other network side devices, including:
  • the network side device receives the specific random access information from the control device.
  • the network side device sends the specific random access information to the terminal, including:
  • the network side device sends the specific random access information to the terminal by using broadcast or dedicated signaling.
  • the network side device sends the specific random access information to the terminal, include:
  • the network side device sends a second message including random access response information in a random access response window.
  • the network side device after receiving the first message that is sent by the terminal and including the preamble in the random access information, the network side device sends a second message that includes the random access response information in the random access response window.
  • a second message that includes the random access response information in the random access response window.
  • the network side device reports the first message to the control device, and determines that the first sending indication of the control device is received.
  • control device notifies the first sending indication to the multiple network side devices
  • the method further includes:
  • the network side device schedules the second message by using a physical downlink control channel PDCCH at the same time and other network side devices that receive the first sending indication, and is addressed by the RA-RNTI;
  • a second message including random access response information, in the random access response window including:
  • the network side device sends, by the other network side device that receives the first sending indication, a second message that includes the same random access response information.
  • control device notifies the first sending indication to the multiple network side devices
  • a second message including random access response information, in the random access response window including:
  • the network side device sends the second message including the same random access response information by using the same time-frequency resource at the same time and other network side devices that receive the first sending indication.
  • the network side device sends the second message that includes the random access response information in the random access response window, including:
  • the network side device sends a second message including random access response information in the random access response window according to the uplink resource configured by the control device and the temporary cell radio network temporary identifier C-RNTI.
  • the method before the network side device sends the second message that includes the random access response information in the random access response window, the method further includes:
  • the network side device determines that the sending condition is met according to the measurement information that receives the first message.
  • the method further includes:
  • the network side device After receiving the second sending indication of the control device, the network side device sends a fourth message including contention resolution information to the terminal.
  • the control device determines specific random access information
  • the control device sends the specific random access information to the plurality of network side devices, so that the multiple network side devices send the specific random access information to the terminal, and the terminal passes the random connection Enter information for access.
  • the method further includes:
  • the control device receives, by the multiple network side devices, the first message that is sent by the same terminal and that includes the preamble in the random access information;
  • the control device selects at least one network side device from the plurality of network side devices, and notifies the selected network side device of the first sending indication, so that the network side device sends the random connection to the terminal The second message into the response message.
  • the controlling device selects at least one network side device from the multiple network side devices, including:
  • the control device selects at least one network side device from the plurality of network side devices according to the measurement information that each network side device receives the first message.
  • the method further includes:
  • the control device allocates different uplink resources and temporary C-RNTIs to the multiple network side devices, so that the network side device receives the first preamble included in the random access information that is sent by the network side device.
  • the second message including the random access response information is sent in the random access response window by using the uplink resource and the temporary C-RNTI.
  • the method further includes:
  • the control device receives, by the plurality of network side devices, the third message that includes the contention information sent by the same terminal, and the measurement information that the multiple network side devices receive the third message, and sends the measurement information to the control device;
  • the control device selects at least one network side device from the plurality of network side devices according to the measurement information of the third message received by each network side device, and notifies the selected network side device of the second sending indication, so that the The network side device sends a fourth message including contention resolution information to the terminal.
  • the terminal performs random access according to the specific random access information.
  • the terminal performs random access according to the specific random access information, including:
  • Some or all of the network side devices transmit a first message including a preamble in the specific random access information
  • the terminal receives at least one second message that is sent by the network side device and includes the same random access response information.
  • the terminal places, in the first message, a preamble bound to the terminal in the specific random access information.
  • the terminal places the terminal identifier in the first message.
  • the terminal after the terminal receives the second message that is sent by the network side device and includes the same random access response information, the terminal further includes:
  • the terminal receives a fourth message that is sent by the at least one network side device and includes contention resolution information.
  • the terminal receives the multiple second messages, and the terminal sends the third message that includes the contention information to the at least one network side device that sends the second message, including:
  • the terminal selects at least one UL TA, and sends a third message including contention information according to the selected UL TA;
  • the terminal selects at least one group of UL grants and temporary C-RNTIs, and according to the selected UL grant and the temporary C-RNTI Send a third message containing the competition information.
  • the terminal sends the third message that includes the contention information according to the selected UL grant and the temporary C-RNTI, including:
  • the terminal When the terminal needs to send multiple third messages, the terminal sends the third message scrambled by different temporary C-RNTIs on different uplink resources of the same subframe according to the selected UL grant.
  • a network side device that performs random access according to an embodiment of the present invention, where the network side device includes:
  • a first information determining module configured to determine the same specific random access information as one or more other network side devices
  • the first processing module is configured to send the specific random access information to the terminal, so that the terminal accesses by using the random access information.
  • the first information determining module is specifically configured to:
  • the first processing module is specifically configured to:
  • the specific random access information is transmitted to the terminal by broadcast or dedicated signaling.
  • the first processing module is further configured to:
  • a second message including random access response information is sent in the random access response window.
  • the first processing module is further configured to:
  • the first message is reported to the control device, and after determining to receive the first sending indication of the control device, sending a second message including random access response information in the random access response window.
  • control device notifies the first sending indication to the multiple network side devices
  • the first processing module is further configured to:
  • the other network side device that receives the first sending indication schedules the second message by using a PDCCH at the same time, and is addressed by the RA-RNTI; and the other network side device that receives the first sending indication sends the The second message of the same random access response information.
  • control device notifies the first sending indication to the multiple network side devices
  • the first processing module is specifically configured to:
  • the first processing module is specifically configured to:
  • the first processing module is further configured to:
  • the second message including the random access response information is sent in the random access response window.
  • the first processing module is further configured to:
  • control device for performing random access according to an embodiment of the present invention, where the control device includes:
  • a second information determining module configured to determine specific random access information
  • a second processing module configured to send the specific random access information to the multiple network side devices, so that the multiple network side devices send the specific random access information to the terminal, and the terminal passes the The random access information is accessed.
  • the second processing module is further configured to:
  • the specific random access information is sent to the plurality of network side devices, receiving, by the plurality of network side devices, the first message sent by the same terminal and including the preamble in the random access information; Selecting at least one network side device from the plurality of network side devices, and notifying the selected network side device of the first sending indication, so that the network side device sends the second message including the random access response information to the terminal .
  • the second processing module is specifically configured to:
  • each network side device selecting at least one network side device from the plurality of network side devices.
  • the second processing module is further configured to:
  • the uplink resource and the temporary C-RNTI send a second message including random access response information in a random access response window.
  • the second processing module is further configured to:
  • the specific random access information is sent to the plurality of network side devices, receiving a third message that is sent by the multiple network side devices and sent by the same terminal, including the contention information, and the plurality of network side devices receiving the The measurement information of the three messages is sent to the control device; according to the measurement information of the third message received by each network side device, at least one network side device is selected from the plurality of network side devices, and the second transmission indication is notified of the selected And the network side device, so that the network side device sends a fourth message including contention resolution information to the terminal.
  • a terminal for performing random access according to an embodiment of the present invention where the terminal includes:
  • a receiving module configured to receive the same specific random access information sent by multiple network side devices
  • An access module configured to perform random access according to the specific random access information.
  • the access module is specifically configured to:
  • the access module is further configured to:
  • the access module is further configured to:
  • the terminal identifier is placed in the first message.
  • the access module is further configured to:
  • the terminal receives multiple second messages
  • the access module is specifically configured to:
  • the UL TAs in the plurality of second messages are different, selecting at least one UL TA, and transmitting a third message including contention information according to the selected UL TA;
  • At least one of the plurality of second messages is different from the temporary C-RNTI, select at least one The group UL grant and the temporary C-RNTI, and send a third message containing the contention information according to the selected UL grant and the temporary C-RNTI.
  • the access module is specifically configured to:
  • the third message scrambled by different temporary C-RNTIs is sent on different uplink resources of the same subframe according to the selected UL grant.
  • a network side device for performing random access includes a memory, a processor, and a transceiver, where
  • the memory is for storing a computer readable program
  • the processor performs a network side device executing method in a method for performing random access according to an embodiment of the present invention by running a program in the memory;
  • the transceiver is for receiving and transmitting data under the control of the processor.
  • control device for performing random access is provided in an embodiment of the present invention, where the control device includes a memory, a processor, and a transceiver;
  • the memory is for storing a computer readable program
  • the processor executes a method in the memory to complete a method for controlling a device in a method for performing random access provided by an embodiment of the present invention
  • the transceiver is for receiving and transmitting data under the control of the processor.
  • a terminal for performing random access includes a memory, a processor, and a transceiver;
  • the memory is for storing a computer readable program
  • the processor executes a program in the memory to complete a terminal execution method in a method for performing random access provided by an embodiment of the present invention
  • the transceiver is for receiving and transmitting data under the control of the processor.
  • the network side device sends the same specific random access information to the terminal as the one or more other network side devices, and the terminal performs random access by using the same specific random access information sent by the multiple network side devices.
  • the terminal does not need to frequently read the random access information in the system information of the cell due to the same specific random access information sent by the multiple network side devices, thereby reducing the power consumption of the terminal and reducing the complexity of the processing; further Improve system performance.
  • 1A is a schematic diagram of contention random access in the background art
  • 1B is a schematic diagram of non-contention random access in the background art
  • FIG. 2A is a schematic diagram of each TRP (Transmission Reception Point) of a scenario in a 5G scenario according to an embodiment of the present invention
  • 2B is a schematic diagram of multiple TRPs in a scenario of a 5G scenario according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a system for performing random access according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a first network side device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a first control device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a first terminal according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a second network side device according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a second control device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a second terminal according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a method for performing random access according to an embodiment of the present invention.
  • FIG. 11 is a schematic flowchart of a second method for performing random access according to an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of a third method for performing random access according to an embodiment of the present invention.
  • FIG. 13 is a schematic flowchart of a method for non-contention random access according to an embodiment of the present invention.
  • FIG. 14 is a schematic flowchart of a method for competing for random access according to an embodiment of the present invention.
  • 15 is a schematic diagram of random access under ideal preamble/backhaul of a multi-TRP cell according to an embodiment of the present invention.
  • 16 is a schematic diagram of random access under non-ideal forward/backhaul of a multi-TRP cell according to an embodiment of the present invention
  • FIG. 17 is a schematic diagram of random access of an ideal preamble/backhaul of a virtual cell according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of random access of a virtual cell under non-ideal forward/backhaul according to an embodiment of the present invention.
  • the network side device sends the same specific random access information to the terminal as the one or more other network side devices, and the terminal performs random access by using the same specific random access information sent by the multiple network side devices.
  • the terminal does not need to frequently read the random access information in the system information of the cell due to the same specific random access information sent by the multiple network side devices, thereby reducing the power consumption of the terminal and reducing the complexity of the processing; further Improve system performance.
  • the solution of the embodiment of the present invention can be applied to any scenario in which the network is densely deployed.
  • the following is a scenario of network intensive deployment.
  • the 5G scenario is a scenario in which the network is densely deployed.
  • CU central unit
  • the centralized node is also called a central processing unit, which can also be called a control device. It can manage and control multiple transmission and reception points TRP.
  • the CU can be a high-level node. For example, a separate access network node: a local gateway (Local Gateway) or a local controller (Local Controller), or a core network node or an OAM (Operation Administration and Maintenance) node; or a base station.
  • a local gateway Local Gateway
  • Local Controller Local Controller
  • OAM Operaation Administration and Maintenance
  • the base station can be regarded as a super base station because it can manage multiple base stations; it can also be a baseband pool in the C-RAN architecture (wherein the C-RAN of the embodiment of the present invention can be It is a centralized radio access network (Centralized-RAN); it can also be a cloud-based radio access network (Cloud-RAN), which centrally processes multiple baseband signals of RRH (Remote Radio Head); Is a CU with partial protocol stack functionality.
  • Centralized-RAN Centralized-RAN
  • Cloud-RAN which centrally processes multiple baseband signals of RRH (Remote Radio Head)
  • RRH Remote Radio Head
  • the base station is also called a TRP (Transmission Reception Point), and the TRP can be a macro station, such as an eNB, an NB (base station), or the like, or a small station, such as an LPN (low power node), an AP ( Access Point, access point, etc.; may also be an RRH in the C-RAN architecture; or a DU (Distributed Unit) having a partial protocol stack function.
  • TRP Transmission Reception Point
  • the TRP can be a macro station, such as an eNB, an NB (base station), or the like, or a small station, such as an LPN (low power node), an AP ( Access Point, access point, etc.; may also be an RRH in the C-RAN architecture; or a DU (Distributed Unit) having a partial protocol stack function.
  • TRPs are controlled by one centralized node CU, one TRP next TRP cell, or multiple TRPs form a virtual cell, and between the TRP and the CU is a fronthaul/backhaul or a non-ideal prequel. /return.
  • the operating frequency of the TRP is below 6 GHz or above 6 GHz.
  • Typical operating bands are below 6 GHz, 3.4 GHz to 3.6 GHz (LTE TDD Band 42); above 6 GHz, outdoor high frequency is 30 GHz, indoor high. Band 70GHz.
  • the system for performing random access in the embodiment of the present invention includes: a network side device 10, a control device 20, and a terminal 30.
  • the network side device 10 is configured to determine the same specific random access information as the one or more other network side devices; and send the specific random access information to the terminal;
  • the control device 20 is configured to determine specific random access information, and send the specific random access information to multiple network side devices.
  • the terminal 30 is configured to receive the same specific random access information sent by multiple network side devices, and perform random access according to the specific random access information.
  • the control device of the embodiment of the present invention may configure the same specific random access information for multiple network side devices
  • the network side device receives the specific random access information from the control device.
  • the specific random access information includes but is not limited to some or all of the following information:
  • Preamble code Root sequence
  • Preamble transmit power
  • PRACH time-frequency resources Random access response window
  • collision resolution timer collision resolution timer
  • control device may assign some or all of the network side devices managed by itself to the same Specific random access information; the network side device may be divided according to the area, and the network side devices in the same area are allocated the same specific random access information.
  • the network side device sends the specific random access information to the terminal by using broadcast or dedicated signaling, such as an on-demand method.
  • Specific random access information can be used to contend random access or non-contention random access procedures.
  • the system information broadcasts specific random access information for competing random access, and the proprietary signaling transmits specific random access information for non-contention random access.
  • multiple TRPs can simultaneously transmit specific random access information.
  • the terminal receives the same specific random access information sent by the multiple network side devices. If there is a preamble code in the specific random access information, the terminal may randomly select the preamble; if there is a PRACH in the specific random access information. For frequency resources, PRACH time-frequency resources can be randomly selected.
  • the terminal may send the first message (ie, Msg1) including the selected preamble through the selected PRACH time-frequency resource.
  • the terminal receives a superposition of a plurality of synchronization signals, which is advantageous for the terminal to accurately receive the random access information.
  • multiple terminals may select the same Preamble code and different PRACH time-frequency resources; or different Preamble codes and the same PRACH time-frequency resources, so competition resolution is required.
  • the random access information corresponding to the first message is bound or mapped with the terminal identifier, so no contention resolution is required.
  • the terminal places, in the first message, a preamble bound to the terminal in the specific random access information.
  • the terminal label bound to the terminal may be configured by the network side to the terminal.
  • the control device sends the device to the network side device through the Msg0, and is sent by the network side device to the terminal.
  • the terminal by using the time-frequency resource in the specific random access information, sends a preamble including the preamble in the specific random access information to some or all of the network side devices of the multiple network side devices. a message;
  • the network side device sends a second message (ie, Msg2) including random access response information in a random access response window;
  • the terminal receives at least one second message that is sent by the network side device and includes the same random access response information.
  • the network side device sends the second message in the random access response window.
  • One is that the network side device and the control device are ideal for forwarding/returning, and the other is the network side device and the control device.
  • the way between non-ideal pre-transmission/retransmission is described in detail below.
  • the network side device and the control device are the ideal way to forward/return.
  • the network side device reports the first message to the control device;
  • control device receives, by the multiple network side devices, the first message that is sent by the same terminal and that includes the preamble in the random access information;
  • the control device selects at least one network side device from the plurality of network side devices, and notifies the selected network side device of the first sending indication;
  • the network side device After the network side device determines to receive the first sending indication of the control device, the network side device sends a second message including random access response information in the random access response window.
  • the control device when the control device selects at least one network side device from the multiple network side devices, the network side device may select, according to the measurement information of the first message, the plurality of network side devices. At least one network side device.
  • control device selects the network-side device that receives the best signal to reply to the second message, or selects some or all of the network-side devices from the plurality of network-side devices that satisfy the condition to reply to the same second message.
  • control device selects, according to the measurement information, a network side device that receives the strongest signal strength; or
  • the control device selects the network side device with the best signal quality according to the measurement information.
  • the control device selects, according to the measurement information, part or all of the network side devices whose received signal strength meets the first threshold and/or the signal quality satisfies the second threshold.
  • multiple network side devices reply the same second message, which may be for reliability transmission.
  • the first threshold and the second threshold may be configured by the control device, configured by the network side device, or manually configured.
  • the one or more network side devices After receiving the first sending indication, the one or more network side devices send the second message in the random access response window.
  • the PDCCH (Single Frequency Network) transmission is equivalent to the SFN (Single Frequency Network) transmission when the second network side device sends the second message.
  • the network side device schedules the second message by using a PDCCH (Physical Downlink Control Channel) at the same time and the other network side device that receives the first sending indication, and passes the RA- RNTI addressing;
  • PDCCH Physical Downlink Control Channel
  • the network side device sends, by the other network side device that receives the first sending indication, a second message that includes the same random access response information.
  • the multiple network side devices use the PDCCH to schedule the second device at the same time, and are addressed by the RA-RNTI;
  • the plurality of network side devices schedule the second message on the same PDCCH resource (for example, CCE), and the content of the scheduled second message is the same, that is, the parameters included in the Msg2 are the same.
  • multiple One of the network side devices uses the PDCCH to schedule a second message, and the plurality of network side devices send the second message of the same content on the same time-frequency resource at the same time.
  • the resource for sending the second message may be that the control device notifies other network side devices, so that multiple network side devices simultaneously send the same second message. Of course, it can also be specified in the agreement.
  • the network side device and the control device are non-ideal forward/backhaul.
  • This method is to reduce the access delay. Therefore, multiple network side devices send the second message without coordination by the control device.
  • the second message sent by the control device can be sent, which is similar to the operation of the ideal forward/backhaul, and will not be described here.
  • the following is an operation in which the non-ideal forward/backhaul delay is not ideal.
  • the control device allocates different uplink resources and temporary C-RNTIs to the multiple network side devices;
  • the network side device after receiving the first message that is sent by the terminal and including the preamble in the random access information, the network side device is in the random access response window according to the uplink resource and the temporary CRNTI configured by the control device. Transmitting a second message containing random access response information.
  • control device allocates different uplink resources and a temporary C-RNTI (Cell Radio Network Temporary Identifier) to the plurality of network side devices that send the same random access information in advance to ensure no collision.
  • C-RNTI Cell Radio Network Temporary Identifier
  • each network side device After receiving the first message sent by the terminal, each network side device generates a second message, and sends a second message in the random access response window.
  • the second message generated by the multiple network side devices may be the same or different.
  • the uplink resource and the temporary C-RNTI (with the RA-RNTI (random access-radio network temporary identifier) included in the second message.
  • the random access-memory network temporary identifier is similar to that of the addressing.
  • the fallback parameter and the uplink timing advance (UL TA) may be the same or different, and the Preamble code corresponding to the first message is the same.
  • the RA-RNTI used for addressing is the same.
  • the network side device determines whether the transmission condition is met according to the measurement information of the first message, and sends a second message including the random access response information in the random access response window after determining that the transmission condition is met.
  • the plurality of network side devices determine, according to the measurement information of the received first message, whether the condition is met, for example, whether the received signal strength satisfies the third threshold value and/or whether the signal quality meets the fourth threshold value, and the network side device that meets the condition replies Two messages.
  • the terminal places the terminal identifier in the first message, which is used to simplify the random access process, for example, to convert the 4-step random access into a 2-step random access.
  • the control device Since the first message includes the terminal identification information, the control device acquires the context of the terminal by using the terminal identification information, and the process needs to be performed by the control device and the CN (core network). Mutual (for example, the process of authentication, authentication, etc. at the time of initial access, or the UE is identified at the time of handover), so the multiple network side devices send the first message to the control device, and the control device schedules the network side device to send the second message, which The method is similar to the operation of the ideal forward/return, and will not be described here. Since the control device has identified the terminal through the first message, the terminal does not need to perform contention resolution.
  • the terminal ends the intervention process by successfully receiving one or more second messages within the random response window.
  • the timeout for the next random access is determined according to the backoff delay parameter, and the random access resource is selected to initiate the next random access.
  • the terminal needs to perform contention resolution, so after the terminal successfully receives one or more second messages in the random response window, the terminal sends the contention information including the contention information to the at least one network side device that sends the second message. Third message.
  • the network side device sends the received third message of the terminal that includes the contention information and the measurement information that receives the third message to the control device;
  • the control device receives, by the plurality of network side devices, the third message that includes the contention information sent by the same terminal, and the measurement information that the multiple network side devices receive the third message, and sends the measurement information to the control device;
  • the control device selects at least one network side device from the plurality of network side devices according to the measurement information of the third message received by each network side device, and notifies the selected network side device of the second sending indication, so that the The network side device sends a fourth message including contention resolution information to the terminal;
  • the network side device After receiving the second sending indication of the control device, the network side device sends a fourth message including contention resolution information to the terminal;
  • the terminal receives a fourth message that is sent by the at least one network side device and includes contention resolution information.
  • the third message sent by the terminal includes terminal identification information (for example, Initial UE-Identity or Reestab UE-Identity) and/or C-RNTI of the terminal.
  • terminal identification information for example, Initial UE-Identity or Reestab UE-Identity
  • C-RNTI of the terminal.
  • the terminal If the terminal receives a second message in the random response window, the terminal sends a third message according to the information contained in the second message.
  • the terminal may select one or more second messages, and send a third message according to the information in the selected second message. Specifically, if the UL TAs included in the multiple second messages are different, the terminal selects one UL TA to send one or more third messages. If the UL grant and the temporary C-RNTI included in the multiple second messages are different, the medium terminal may select one or more sets of UL grants (uplink grants) and temporary C-RNTIs to send one or more third messages.
  • the terminal selects at least one UL TA, and sends a third message including contention information according to the selected UL TA;
  • the terminal selects at least one group of UL grants and temporary C-RNTIs, and sends the contention information according to the selected UL grant and the temporary C-RNTI.
  • the third message If the UL grant and the temporary C-RNTI in the multiple second messages are different, the terminal selects at least one group of UL grants and temporary C-RNTIs, and sends the contention information according to the selected UL grant and the temporary C-RNTI. The third message.
  • the terminal receives multiple second messages sent by multiple network side devices in the same subframe, and the terminal sends multiple third messages, if the UL grant and the temporary C-RNTI are different, the UE is in the same sub A third message that transmits the same content but is subjected to different scrambling on different uplink resources of the frame. That is, the terminal sends the third message that is scrambled by using different temporary C-RNTIs on different uplink resources of the same subframe according to the selected UL grant, where the content of the multiple third messages that need to be sent is the same.
  • the one or more network side devices send the third message to the control device, and report the measurement of receiving the third message.
  • Information including received signal strength, signal quality, etc.
  • the control device identifies the terminal through the terminal identification information and/or the C-RNTI of the terminal, performs a contention resolution decision, and schedules the network side device to send a fourth message, that is, selects the best network side device to send the fourth message or meets the condition.
  • the network side devices send the same fourth message.
  • the control device performs a contention resolution decision, and the network side device is scheduled to send a fourth message, where the fourth message includes the terminal.
  • Competitive resolution information if the terminal indicated by the third message sent by the one or more network side devices is the same, the control device performs a contention resolution decision, and the network side device is scheduled to send a fourth message, where the fourth message includes the terminal.
  • the control device performs a contention resolution decision, and schedules the network side device to send a fourth message, where different fourth messages include competition of different terminals. Solve the information.
  • the terminal After receiving the fourth message containing the information related to the contention resolution, the terminal considers that the contention resolution is successful.
  • the terminal fails to receive the second message, determining, according to the backoff delay parameter, the time at which the next random access is initiated, and selecting the random access resource to initiate the next random access.
  • the terminal fails to receive the fourth message, it determines, according to the backoff delay parameter, the time at which the next random access is initiated, and selects the random access resource to initiate the next random access.
  • the network side device in the embodiment of the present invention may be a base station, where the base station may also be referred to as a TRP, and the TRP may be a macro station, such as an eNB, an NB, etc., and the network side device in the embodiment of the present invention may also be a small station such as an LPN.
  • the network side device in the embodiment of the present invention may also be an RRH in the C-RAN architecture.
  • the network side device in the embodiment of the present invention may also be a DU having a partial protocol stack function.
  • the first network side device in the embodiment of the present invention includes:
  • the first information determining module 400 is configured to determine the same specific random access information as the one or more other network side devices;
  • the first processing module 401 is configured to send the specific random access information to the terminal, so that the terminal accesses by using the random access information.
  • the first information determining module 400 is specifically configured to:
  • the first processing module 401 is specifically configured to:
  • the specific random access information is transmitted to the terminal by broadcast or dedicated signaling.
  • the first processing module 401 is further configured to:
  • the first processing module 401 is further configured to:
  • the first message is reported to the control device, and after determining to receive the first sending indication of the control device, sending a second message including random access response information in the random access response window.
  • control device notifies the first sending indication to the multiple network side devices
  • the first processing module 401 is further configured to:
  • the other network side device that receives the first sending indication schedules the second message by using a PDCCH at the same time, and is addressed by the RA-RNTI; and the other network side device that receives the first sending indication sends the The second message of the same random access response information.
  • control device notifies the first sending indication to the multiple network side devices
  • the first processing module 401 is specifically configured to:
  • the first processing module 401 is specifically configured to:
  • the first processing module 401 is further configured to:
  • the second message including the random access response information is sent in the random access response window.
  • the first processing module 401 is further configured to:
  • the first control device of the embodiment of the present invention includes:
  • a second information determining module 500 configured to determine specific random access information
  • the second processing module 501 is configured to send the specific random access information to the multiple network side devices, so that the multiple network side devices send the specific random access information to the terminal, and the terminal passes the The random access information is accessed.
  • the second processing module 501 is further configured to:
  • the device After transmitting the specific random access information to multiple network side devices, receiving multiple network sides And transmitting, by the device, the first message that is sent by the same terminal and including the preamble in the random access information; selecting at least one network side device from the multiple network side devices, and notifying the selected one of the first sending indication The network side device, so that the network side device sends a second message including random access response information to the terminal.
  • the second processing module 501 is specifically configured to:
  • each network side device selecting at least one network side device from the plurality of network side devices.
  • the second processing module 501 is further configured to:
  • the uplink resource and the temporary C-RNTI send a second message including random access response information in a random access response window.
  • the second processing module 501 is further configured to:
  • the specific random access information is sent to the plurality of network side devices, receiving a third message that is sent by the multiple network side devices and sent by the same terminal, including the contention information, and the plurality of network side devices receiving the The measurement information of the three messages is sent to the control device; according to the measurement information of the third message received by each network side device, at least one network side device is selected from the plurality of network side devices, and the second transmission indication is notified of the selected And the network side device, so that the network side device sends a fourth message including contention resolution information to the terminal.
  • the first terminal of the embodiment of the present invention includes:
  • the receiving module 600 is configured to receive the same specific random access information sent by multiple network side devices.
  • the access module 601 is configured to perform random access according to the specific random access information.
  • the access module 601 is specifically configured to:
  • the access module 601 is further configured to:
  • the access module 601 is further configured to:
  • the terminal identifier is placed in the first message.
  • the access module 601 is further configured to:
  • a third message After receiving the second message that is sent by the network side device and containing the same random access response information, sending, by the at least one network side device that sends the second message, the contention information.
  • a third message After receiving the second message that is sent by the network side device and containing the same random access response information, sending, by the at least one network side device that sends the second message, the contention information.
  • a third message receiving, by the at least one network side device, a fourth message that includes contention resolution information.
  • the terminal receives multiple second messages
  • the access module 601 is specifically configured to:
  • the UL TAs in the plurality of second messages are different, selecting at least one UL TA, and transmitting a third message including contention information according to the selected UL TA;
  • the UL grant and the temporary C-RNTI in the multiple second messages are different, selecting at least one set of UL grants and temporary C-RNTIs, and sending the third content including the contention information according to the selected UL grant and the temporary C-RNTI Message.
  • the access module 601 is specifically configured to:
  • the third message scrambled by different temporary C-RNTIs is sent on different uplink resources of the same subframe according to the selected UL grant.
  • the second network side device of the embodiment of the present invention includes:
  • the processor 701 is configured to read a program in the memory 704 and perform the following process:
  • Determining the same specific random access information as one or more other network side devices Determining the same specific random access information as one or more other network side devices; transmitting the specific random access information to the terminal through the transceiver 702, so that the terminal accesses through the random access information.
  • the transceiver 702 is configured to receive and transmit data under the control of the processor 701.
  • the processor 701 is specifically configured to:
  • the processor 701 is specifically configured to:
  • the specific random access information is transmitted to the terminal by broadcast or dedicated signaling.
  • processor 701 is further configured to:
  • processor 701 is further configured to:
  • the first message is reported to the control device, and after determining to receive the first sending indication of the control device, sending a second message including random access response information in the random access response window.
  • control device notifies the first sending indication to the multiple network side devices
  • the processor 701 is further configured to:
  • the other network side device that receives the first sending indication schedules the second message by using a PDCCH at the same time, and is addressed by the RA-RNTI; and the other network side device that receives the first sending indication sends the The second message of the same random access response information.
  • control device notifies the first sending indication to the multiple network side devices
  • the processor 701 is specifically configured to:
  • the processor 701 is specifically configured to:
  • processor 701 is further configured to:
  • the second message including the random access response information is sent in the random access response window.
  • processor 701 is further configured to:
  • the sending and receiving of the processor 701 are performed by the transceiver 702.
  • bus architecture (represented by bus 700), which may include any number of interconnected buses and bridges, will include one or more processors represented by processor 701 and memory represented by memory 704. The various circuits are linked together.
  • the bus 700 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.
  • Bus interface 703 provides an interface between bus 700 and transceiver 702.
  • Transceiver 702 can be an element or a plurality of elements, such as multiple receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the processor 701 is transmitted over the wireless medium via the antenna 705. Further, the antenna 705 also receives the data and transmits the data to the processor 701.
  • the processor 701 is responsible for managing the bus 700 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 704 can be used to store data used by the processor 701 in performing operations.
  • the processor 701 may be a CPU (Central Embedded Device), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device). , complex programmable logic devices).
  • CPU Central Embedded Device
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the second control device of the embodiment of the present invention includes:
  • the processor 801 is configured to read a program in the memory 804 and perform the following process:
  • Determining the specific random access information transmitting, by the transceiver 802, the specific random access information to the plurality of network side devices, so that the plurality of network side devices send the specific random access information to the terminal, The terminal accesses through the random access information.
  • the transceiver 802 is configured to receive and transmit data under the control of the processor 801.
  • the processor 801 is further configured to:
  • the device After transmitting the specific random access information to multiple network side devices, receiving multiple network sides And transmitting, by the device, the first message that is sent by the same terminal and including the preamble in the random access information; selecting at least one network side device from the multiple network side devices, and notifying the selected one of the first sending indication The network side device, so that the network side device sends a second message including random access response information to the terminal.
  • the processor 801 is specifically configured to:
  • each network side device selecting at least one network side device from the plurality of network side devices.
  • the processor 801 is further configured to:
  • the uplink resource and the temporary C-RNTI send a second message including random access response information in a random access response window.
  • the processor 801 is further configured to:
  • the specific random access information is sent to the plurality of network side devices, receiving a third message that is sent by the multiple network side devices and sent by the same terminal, including the contention information, and the plurality of network side devices receiving the The measurement information of the three messages is sent to the control device; according to the measurement information of the third message received by each network side device, at least one network side device is selected from the plurality of network side devices, and the second transmission indication is notified of the selected And the network side device, so that the network side device sends a fourth message including contention resolution information to the terminal.
  • the sending and receiving of the processor 801 are performed by the transceiver 802.
  • bus 800 may include any number of interconnected buses and bridges, and bus 800 will include one or more processors represented by processor 801 and memory represented by memory 804. The various circuits are linked together.
  • the bus 800 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • Bus interface 803 provides an interface between bus 800 and transceiver 802.
  • Transceiver 802 can be an element or a plurality of elements, such as multiple receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the processor 801 is transmitted over the wireless medium via the antenna 805. Further, the antenna 805 also receives the data and transmits the data to the processor 801.
  • the processor 801 is responsible for managing the bus 800 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 804 can be used to store data used by the processor 801 when performing operations.
  • the processor 801 can be a CPU, an ASIC, an FPGA, or a CPLD.
  • the second terminal of the embodiment of the present invention includes:
  • the processor 901 is configured to read a program in the memory 904 and perform the following process:
  • the transceiver 902 is configured to receive and transmit data under the control of the processor 901.
  • the processor 901 is specifically configured to:
  • processor 901 is further configured to:
  • processor 901 is further configured to:
  • the terminal identifier is placed in the first message.
  • processor 901 is further configured to:
  • the terminal receives multiple second messages
  • the processor 901 is specifically configured to:
  • the UL TAs in the plurality of second messages are different, selecting at least one UL TA, and transmitting a third message including contention information according to the selected UL TA;
  • the UL grant and the temporary C-RNTI in the multiple second messages are different, selecting at least one set of UL grants and temporary C-RNTIs, and sending the third content including the contention information according to the selected UL grant and the temporary C-RNTI Message.
  • the processor 901 is specifically configured to:
  • the third message scrambled by different temporary C-RNTIs is sent on different uplink resources of the same subframe according to the selected UL grant.
  • the sending and receiving of the processor 901 are performed by the transceiver 902.
  • bus 900 may include any number of interconnected buses and bridges, and bus 900 will include one or more processors and memory 904 represented by general purpose processor 901. The various circuits of the memory are linked together.
  • the bus 900 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • Bus interface 903 provides an interface between bus 900 and transceiver 902.
  • Transceiver 902 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium. For example, transceiver 902 receives external data from other devices. The transceiver 902 is configured to send the processed data of the processor 901 to other devices.
  • a user interface 905 can also be provided, such as a keypad, display, speaker, microphone, joystick.
  • the processor 901 is responsible for managing the bus 900 and the usual processing, running a general purpose operating system as described above.
  • the memory 904 can be used to store data used by the processor 901 in performing operations.
  • the processor 901 can be a CPU, an ASIC, an FPGA, or a CPLD.
  • the method for performing random access is also provided in the embodiment of the present invention.
  • the principle of solving the problem is similar to the system for performing random access in the embodiment of the present invention. Therefore, the implementation of the method can be referred to the system. The implementation of the network side device will not be repeated here.
  • the first method for performing random access in the embodiment of the present invention includes:
  • Step 1000 The network side device determines the same specific random access information as one or more other network side devices.
  • Step 1001 The network side device sends the specific random access information to the terminal, so that the terminal accesses by using the random access information.
  • the network side device determines the same random access information as the one or more other network side devices, including:
  • the network side device receives the specific random access information from the control device.
  • the network side device sends the specific random access information to the terminal, including:
  • the network side device sends the specific random access information to the terminal by using broadcast or dedicated signaling.
  • the method further includes:
  • the network side device sends a second message including random access response information in a random access response window.
  • the network side device after receiving the first message that is sent by the terminal and including the preamble in the random access information, the network side device sends a second message that includes the random access response information in the random access response window.
  • a second message that includes the random access response information in the random access response window.
  • the network side device reports the first message to the control device, and determines that the first sending indication of the control device is received.
  • control device notifies the first sending indication to the multiple network side devices
  • the method further includes:
  • the network side device schedules the second message by using a physical downlink control channel PDCCH at the same time and other network side devices that receive the first sending indication, and is addressed by the RA-RNTI;
  • a second message including random access response information, in the random access response window including:
  • the network side device sends, by the other network side device that receives the first sending indication, a second message that includes the same random access response information.
  • control device notifies the first sending indication to the multiple network side devices
  • a second message including random access response information, in the random access response window including:
  • the network side device sends the second message including the same random access response information by using the same time-frequency resource at the same time and other network side devices that receive the first sending indication.
  • the network side device sends the second message that includes the random access response information in the random access response window, including:
  • the network side device sends a second message including random access response information in the random access response window according to the uplink resource configured by the control device and the temporary cell radio network temporary identifier C-RNTI.
  • the method before the network side device sends the second message that includes the random access response information in the random access response window, the method further includes:
  • the network side device determines that the sending condition is met according to the measurement information that receives the first message.
  • the method further includes:
  • the network side device After receiving the second sending indication of the control device, the network side device sends a fourth message including contention resolution information to the terminal.
  • the method for performing random access is also provided in the embodiment of the present invention.
  • the principle of solving the problem is similar to the system for performing random access in the embodiment of the present invention. Therefore, the implementation of the method can be referred to the system. The implementation of the medium control device will not be repeated here.
  • the second method for performing random access in the embodiment of the present invention includes:
  • Step 1100 The control device determines specific random access information.
  • Step 1101 The control device sends the specific random access information to a plurality of network side devices, so that the multiple network side devices send the specific random access information to the terminal, and the terminal passes the The random access information is accessed.
  • the method further includes:
  • the control device receives, by the multiple network side devices, the first message that is sent by the same terminal and that includes the preamble in the random access information;
  • the control device selects at least one network side device from the plurality of network side devices, and notifies the selected network side device of the first sending indication, so that the network side device sends the random connection to the terminal The second message into the response message.
  • the controlling device selects at least one network side device from the multiple network side devices, including:
  • the control device selects at least one network side device from the plurality of network side devices according to the measurement information that each network side device receives the first message.
  • the method further includes:
  • the control device allocates different uplink resources and temporary C-RNTIs to the multiple network side devices, so that the network side device receives the first preamble included in the random access information that is sent by the network side device.
  • the second message including the random access response information is sent in the random access response window by using the uplink resource and the temporary C-RNTI.
  • the method further includes:
  • the control device receives, by the plurality of network side devices, the third message that includes the contention information sent by the same terminal, and the measurement information that the multiple network side devices receive the third message, and sends the measurement information to the control device;
  • the control device selects at least one network side device from the plurality of network side devices according to the measurement information of the third message received by each network side device, and notifies the selected network side device of the second sending indication, so that the The network side device sends a fourth message including contention resolution information to the terminal.
  • the method for performing random access is also provided in the embodiment of the present invention.
  • the principle of solving the problem is similar to the system for performing random access in the embodiment of the present invention. Therefore, the implementation of the method can be referred to the system. The implementation of the terminal is not repeated here.
  • a third method for performing random access includes:
  • Step 1200 The terminal receives the same specific random access information sent by multiple network side devices.
  • Step 1201 The terminal performs random access according to the specific random access information.
  • the terminal performs random access according to the specific random access information, including:
  • the terminal receives at least one second message that is sent by the network side device and includes the same random access response information.
  • the terminal places, in the first message, a preamble bound to the terminal in the specific random access information.
  • the terminal places the terminal identifier in the first message.
  • the terminal after the terminal receives the second message that is sent by the network side device and includes the same random access response information, the terminal further includes:
  • the terminal receives a fourth message that is sent by the at least one network side device and includes contention resolution information.
  • the terminal receives the multiple second messages, and the terminal sends the third message that includes the contention information to the at least one network side device that sends the second message, including:
  • the terminal selects at least one UL TA, and sends a third message including contention information according to the selected UL TA;
  • the terminal selects at least one group of UL grants and temporary C-RNTIs, and according to the selected UL grant and the temporary C-RNTI Send a third message containing the competition information.
  • the terminal sends the third message that includes the contention information according to the selected UL grant and the temporary C-RNTI, including:
  • the terminal When the terminal needs to send multiple third messages, the terminal sends the third message scrambled by different temporary C-RNTIs on different uplink resources of the same subframe according to the selected UL grant.
  • the method for non-contention random access in the embodiment of the present invention includes:
  • Step 1301 The CU configures multiple TRPs with the same specific random access information.
  • the specific random access information includes a Preamble code, a Root sequence, a Preamble transmission power, a PRACH time-frequency resource, a random access response window, and a collision resolution timer.
  • Step 1302 Multiple TRPs send the same specific random access information.
  • the specific random access information may be broadcast to the UE in the system information, or may be sent in the on-demand mode, that is, by using dedicated signaling.
  • Specific random access information can be used to contend random access or non-contention random access procedures.
  • the system information broadcasts specific random access information for competing random access, and the proprietary signaling transmits specific random access information for non-contention random access.
  • multiple TRPs need to be sent synchronously.
  • Step 1303 The UE acquires the same specific random access information sent by multiple TRPs, and sends Msg1.
  • the UE After the UE randomly selects a certain Preamble code and a certain PRACH time-frequency resource indicated in the specific random access information, the UE transmits the Preamble code on the PRACH time-frequency resource. Since multiple TRPs are synchronously transmitted, the UE receives a superposition of multiple synchronization signals when receiving, which is beneficial for the UE to accurately receive specific random access information.
  • the specific random access information corresponding to the Msg1 is bound or mapped with the UE identifier, so no contention resolution is required.
  • the Msg1 may include UE identification information, which is used to simplify the random access procedure, for example, to convert the 4-step random access into a 2-step random access.
  • Step 1304 After receiving multiple Msg1s sent by the UE, multiple TRPs adjacent to the UE send Msg2 in the random access response window.
  • Msg2 includes a backoff parameter, a Preamble code corresponding to Msg1, an uplink transmission timing advance (UL TA), an uplink resource (UL grant), and a temporary C-RNTI (for security).
  • UL TA uplink transmission timing advance
  • UL grant uplink resource
  • C-RNTI temporary C-RNTI
  • the TRP uses the PDCCH to schedule the Msg2 and is addressed by the RA-RNTI.
  • the RA-RNTI 1+t_id+10*f_id, that is, the RA-RNTI is determined by the PRACH time-frequency resource location carrying the Msg1.
  • TRP transmits Msg2 in the random access response window.
  • One is the ideal pre-transmission/back-transmission between TRP and CU, and the other is the non-ideal pre-transmission/retransmission between TRP and CU. The following is a detailed introduction.
  • Multiple TRPs send Msg1 to the CU, and report the measurement information of the received Msg1, including the received signal strength and signal quality.
  • the CU judges that the plurality of TRPs receive the Msg1 of the same UE through the same Preamble code and the PRACH time-frequency resource in the Msg1, thereby performing coordination processing, selecting a best TRP reply Msg2, or multiple receiving.
  • the TRP whose signal satisfies the condition replies to the same Msg2.
  • the TRP with the highest received signal strength or the TRP with the best signal quality is selected according to the measurement information of the received Msg1, or multiple TRPs whose received signal strength and signal quality meet the preset threshold are selected. Selecting a plurality of received signals that satisfy the condition of the TRP replies to the same Msg2 for reliability transmission.
  • the preset threshold can be configured by the CU or by the TRP self-configuration.
  • One or more TRPs receive an indication that the CU sends Msg2, and send Msg2 in the random access response window.
  • multiple TRPs may be multi-point transmit diversity transmission, which is equivalent to SFN (Single Frequency Network) transmission.
  • multiple TRPs use the PDCCH scheduling Msg2 at the same time, and are addressed by the RA-RNTI.
  • the multiple TRPs schedule Msg2 on the same PDCCH resource (for example, CCE), and the content of the scheduled Msg2 is the same, that is, Msg2.
  • the parameters included in it are the same.
  • one of the plurality of TRPs uses the PDCCH scheduling Msg2, and the plurality of TRPs send the Msg2 of the same content on the same time-frequency resource at the same time.
  • the TRP and the CU are non-ideal forward/backhaul.
  • multiple TRPs send Msg2 without CU coordination. If the non-ideal forward/return is ideal for delay and the throughput is not ideal, the CU coordinated Msg2 transmission can be performed, analogous to the ideal pre-transmission/back-transmission operation. The following is an operation in which the non-ideal forward/backhaul delay is not ideal.
  • the CU allocates different uplink resources, temporary C-RNTI, for multiple TRPs that send the same specific random access information in advance, and guarantees no conflict.
  • multiple TRPs After receiving multiple Msg1s sent by the UE, multiple TRPs respectively generate Msg2 with different contents and send Msg2 in the random access response window.
  • the uplink resource and the temporary C-RNTI included in the Msg2 are different, and the fallback parameter and the UL TA may be the same or different, and the Preamble code corresponding to the Msg1 is the same, and the RA-RNTI used for addressing is the same. Further, the plurality of TRPs determine whether the condition is met according to the measurement information of the received Msg1, for example, whether the received signal strength and the signal quality satisfy a preset threshold, and the TRP that satisfies the condition recovers Msg2.
  • multiple TRPs may use the PDCCH scheduling Msg2 at the same time. If different PDCCH resource scheduling Msg2, the UE may correctly receive multiple different Msg2. If the same PDCCH resource scheduling Msg2, the UE may be correct. Receiving multiple different Msg2 may not be resolved. This is because multiple TRPs schedule Msg2 on the same PDCCH resource at the same time, and the transmission signal strengths of multiple TRPs are equivalent and interfere with each other. The probability of such resolution is extremely small, and this problem also exists in existing LTE systems.
  • the CU needs to obtain the context of the UE by using the UE identification information.
  • This process requires the CU to interact with the core network CN (for example, authentication, authentication, etc. during initial access). Or, the UE is identified when the handover is performed. Therefore, multiple TRPs send the Msg1 to the CU, and the Msg2 is coordinated by the CU. This mode is similar to the operation of the ideal preamble/backhaul, and is not described here. Since the CU has already identified the UE through Msg1, the UE does not need to perform a contention resolution.
  • Step 1305 The UE successfully receives one or more Msg2s in the random response window, and the non-contention random access is completed.
  • the time of the next random access is determined according to the backoff delay parameter, and the random access resource is selected to initiate the next random access.
  • the method for competing for random access in the embodiment of the present invention includes:
  • Steps 1401 to 1404 are the same as steps 1301 to 1304, and are not described herein again.
  • step 1403 for the contention random access, multiple UEs may select the same Preamble code and different PRACH time-frequency resources; or may select different Preamble codes and the same PRACH time-frequency resources.
  • Step 1405 The UE successfully receives one or more Msg2s in the random response window.
  • the time of the next random access is determined according to the backoff delay parameter, and the random access resource is selected to initiate the next random access.
  • the situation in which multiple UEs perform contention resolution is similar to the existing LTE system.
  • UE1 and UE2 initiate contention random access, and the information of Msg1 and Msg2 is as shown in the following table.
  • Step 1406 The UE sends Msg3 to one or more TRPs.
  • the Msg3 includes UE identification information (for example, Initial UE-Identity or Reestab UE-Identity) or a C-RNTI of the UE.
  • UE identification information for example, Initial UE-Identity or Reestab UE-Identity
  • C-RNTI of the UE.
  • Msg3 is sent according to the information contained in the Msg2.
  • the UE may select one or more to send Msg3.
  • the UE selects one UL TA to send one or more Msg3s. If the UL grant and the temporary C-RNTI included in the multiple Msg2 are different, the UE selects one or more sets of UL grants and the temporary C-RNTI to send one or more Msg3s.
  • the UE receives multiple Msg2s sent by multiple TRPs in the same subframe. If the UL grant and the temporary C-RNTI are different, the UE sends Msg3 scrambled by different temporary C-RNTIs on different uplink resources in the same subframe. .
  • Step 1407 One or more TRPs send measurement information of Msg3 and receiving Msg3 to the CU.
  • the CU Since the Msg3 includes the UE identification information or the C-RNTI of the UE, the CU needs to perform processing. Therefore, one or more TRPs send the Msg3 to the CU, and simultaneously report the measurement information of the received Msg3, including the received signal strength, the signal quality, and the like.
  • Step 1408 The CU identifies the UE by using the UE identity information or the C-RNTI of the UE, performs a contention resolution decision, and performs coordinated Msg4 transmission.
  • the sending Msg4 is similar to the sending Msg2, that is, selecting the best TRP to send Msg4 or multiple TRPs satisfying the condition to send the same Msg4.
  • the CU performs a contention resolution decision, and performs coordinated Msg4 transmission, where the Msg4 includes the UE.
  • Competitive resolution information if the UEs indicated in the Msg3 sent by the one or more TRPs are the same, the CU performs a contention resolution decision, and performs coordinated Msg4 transmission, where the Msg4 includes the UE.
  • the CU performs a contention resolution decision and performs coordinated Msg4 transmission, and different Msg4 includes contention resolution information of different UEs.
  • Step 1409 The TRP sends the Msg4 including the contention resolution information to the terminal according to the indication of the CU.
  • Step 1410 After receiving the Msg4 including the contention resolution information, the UE considers that the contention resolution is successful.
  • the UE determines the time of the next random access according to the backoff delay parameter, and selects the random access resource to initiate the next random access.
  • Embodiment 1 As shown in FIG. 15, a schematic diagram of random access under ideal pre-transmission/back-transmission in a multi-TRP cell according to an embodiment of the present invention.
  • Step 1 UE1 performs handover between multiple TRP cells under CU management.
  • UE1 switches from the source cell (TRP2 cell Cell2) to the target cell (TRP3 cell Cell3 and/or TRP4 cell Cell4).
  • TRP2 cell Cell2 the source cell
  • TRP3 cell Cell3 and/or TRP4 cell Cell4 the target cell
  • Step 2 The CU instructs the TRP2 to send non-contention specific random access information through dedicated signaling.
  • the Msg0 is sent by using the RRC connection reconfiguration message, and the Msg0 includes the Preamble code and the PRACH channel resource used by the UE1 to initiate the non-contention random access, and the specific random access information is tied with the identifier of the UE1 (for example, the C-RNTI of the UE1). Or mapping.
  • Step 3 UE1 acquires non-contention specific random access information sent by TRP2, and sends Msg1.
  • Step 4 TRP3 and TRP4 adjacent to UE1 receive Msg1 sent by UE1.
  • the TRP3 and the TRP4 send the Msg1 to the CU, and report the measurement information of the received Msg1, including the received signal strength (for example, received power RP, received power), and signal quality (for example, SINR). .
  • the received signal strength for example, received power RP, received power
  • signal quality for example, SINR
  • the CU determines that the TRP3 and the TRP4 have received the Msg1 of the same UE by using the same Preamble code and the PRACH time-frequency resource in the two Msg1s, and the binding or mapping relationship between the specific random access information corresponding to the Msg1 and the identifier of the UE1 is performed. It is identified as UE1.
  • the CU performs coordination processing, and selects the TRP with the highest received signal strength or the TRP with the best signal quality Msg2 according to the measurement information of the received Msg1. For example, the received power of the TRP4 is greater than the received power of the TRP3, and the CU selects the TRP4 to send the Msg2.
  • the TRP4 receives an indication that the CU sends Msg2, and sends Msg2 in the random access response window.
  • Msg2 includes a backoff parameter, a Preamble code corresponding to Msg1, and an uplink transmission timing Pre-quantity (UL TA), uplink resource (UL grant), temporary C-RNTI and other parameters.
  • UL TA uplink transmission timing Pre-quantity
  • UL grant uplink resource
  • temporary C-RNTI temporary C-RNTI
  • Step 5 UE1 successfully receives an Msg2 in the random response window to complete the non-contention random access procedure.
  • Embodiment 2 As shown in FIG. 16, a schematic diagram of random access under non-ideal forward/backhaul of a multi-TRP cell according to an embodiment of the present invention.
  • Step 1 The CU configures the same specific random access information for the TRP1 cell to the TRP4 cell under its management, including the Preamble code, the Root sequence, the Preamble transmission power, the PRACH time-frequency resource, the random access response window, the collision resolution timer, and the like. .
  • Step 2 TRP1 ⁇ TRP4 synchronously send the same specific random access information in the system information for competing random access.
  • Step 3 The radio link failure (RLF) occurs in UE2, and a connection reestablishment process is initiated.
  • RLF radio link failure
  • UE2 acquires the same specific random access information transmitted by multiple TRPs (for example, TRP2, TRP3, and TRP4), and transmits Msg1.
  • TRPs for example, TRP2, TRP3, and TRP4.
  • UE2 randomly selects a certain Preamble code (for example, Preamble1) indicated in the specific random access information, and a certain PRACH time-frequency resource (for example, PRACH1), and then transmits Preamble1 on PRACH1.
  • a certain Preamble code for example, Preamble1
  • PRACH1 PRACH time-frequency resource
  • the UE2 Since the three TRPs are synchronously transmitted, the UE2 receives a superposition of a plurality of synchronization signals, which facilitates the UE 2 to accurately receive specific random access information.
  • Step 4 The TRP2, TRP3, and TRP4 adjacent to the UE2 receive the Msg1 sent by the UE2.
  • the three TRPs do not perform CU coordination to send the Msg2.
  • the CU allocates different uplink resources and temporary C-RNTIs to the TRP1 cell to the TRP4 cell that send the same specific random access information in advance, so as to ensure no collision.
  • the three TRPs determine whether the condition is met according to the measurement information of the received Msg1, for example, whether the received signal strength and the signal quality satisfy the preset threshold, and the TRP that satisfies the condition recovers Msg2.
  • the received power of TRP3 and TRP4 is greater than the preset threshold (configured by the CU), and the received power of the TRP2 is less than the preset threshold. Therefore, each of the TRP3 and the TRP4 generates Msg2 with different contents, and sends the Msg2 in the random access response window.
  • the uplink resource and the temporary C-RNTI included in Msg2 are different, the backoff parameters are different, and the UL TA is the same (UE2 is relatively close to TRP3 and TRP4), and the Preamble code corresponding to Msg1 is the same, and the RA-RNTI used for addressing is the same. .
  • TRP3 and TRP4 use the different PDCCH resources to schedule Msg2 at the same time.
  • Step 5 UE2 successfully receives 2 Msg2s in the random response window.
  • Step 6 Since UE2 receives 2 Msg2s sent by 2 TRPs in the same subframe, among them UL The grant is different from the temporary C-RNTI.
  • the UE2 transmits Msg3 scrambled by different temporary C-RNTIs on different uplink resources in the same subframe.
  • the Msg3 includes the identification information of the UE2 (for example, ReestabUE-Identity1).
  • Step 7 Since the Msg3 includes the identification information of the UE2, the CU needs to perform processing. Therefore, the TRP3 and the TRP4 send the two Msg3s to the CU, and simultaneously report the measurement information of the received Msg3, including the received signal strength, the signal quality, and the like.
  • the CU identifies the UE2 by using the identification information of the UE2, and determines that the UEs indicated in the Msg3 sent by the two TRPs are the same, thereby performing a contention resolution decision, and selecting the TRP4 with the largest RP to send the Msg4.
  • the TRP4 receives the indication that the CU sends the Msg4, and sends the Msg4 before the conflict resolution timer expires.
  • the Msg4 includes the contention resolution information of the UE2.
  • Step 8 UE2 receives the contention resolution information of UE2 before the collision resolution timer expires, and UE2 considers that the contention resolution is successful, and completes the contention random access procedure.
  • Embodiment 3 As shown in FIG. 17, a schematic diagram of random access of an ideal preamble/backhaul of a virtual cell according to an embodiment of the present invention.
  • Step 1 The virtual cell under the CU management includes TRP1 to TRP4, and the CU is configured with the same specific random access information of the four TRPs, including the Preamble code, the Root sequence, the Preamble transmission power, the PRACH time-frequency resource, and the random access response window. Conflict resolution timer, etc.
  • Step 2 TRP1 ⁇ TRP4 synchronously send the same specific random access information in the system information for competing random access.
  • Step 3 UE3 is an inactive state UE in a connected mode.
  • the simplified random access procedure is initiated, that is, the Msg1 includes the UE identifier, and the 4-step random access procedure can be simplified to 2 steps (only Msg1 and Msg2 are needed).
  • the UE3 obtains the same specific random access information sent by multiple TRPs (for example, TRP2, TRP3, and TRP4), and sends Msg1, that is, the UE3 randomly selects a Preamble code (such as Preamble2) indicated in the specific random access information, and some After the PRACH time-frequency resource (for example, PRACH2), Preamble2 is transmitted on PRACH2.
  • TRP2 for example, TRP2, TRP3, and TRP4
  • Msg1 that is, the UE3 randomly selects a Preamble code (such as Preamble2) indicated in the specific random access information
  • PRACH time-frequency resource for example, PRACH2
  • the UE3 Since the three TRPs are synchronously transmitted, the UE3 receives a superposition of a plurality of synchronization signals, which facilitates the UE 3 to accurately receive specific random access information.
  • the Msg1 of the UE3 includes the identification information of the UE3 (for example, the C-RNTI of the UE3).
  • Step 4 TRP2, TRP3, and TRP4 adjacent to UE3 receive Msg1 sent by UE3.
  • TRP2, TRP3, and TRP4 send the Msg1 to the CU, and report the measurement information of the received Msg1, including the received signal strength (for example, received power RP, received power), and signal quality (for example, SINR).
  • received signal strength for example, received power RP, received power
  • signal quality for example, SINR
  • the CU identifies the UE3 by using the identification information of the UE3, and determines that the three TRPs are sent in the Msg1.
  • the indicated UEs are the same.
  • the CU performs coordination processing, and selects multiple TRPs whose received signal strength or signal quality meets the preset threshold to reply to the same Msg2 according to the measurement information of the received Msg1, for example, the SINR of TRP3 and TRP4 is greater than a preset threshold (CU configured), and TRP2 The SINR is less than the preset threshold. Therefore, the CU selects TRP3 and TRP4 to transmit the same Msg2 for reliability transmission.
  • TRP3 and TRP4 receive the indication that the CU sends Msg2, and send the same Msg2 in the random access response window, which is a multi-point transmit diversity transmission.
  • TRP3 and TRP4 use the PDCCH to schedule Msg2 at the same time, and are addressed by C-RNTI.
  • the two TRPs schedule Msg2 on the same PDCCH resource (for example, CCE), and the content of the scheduled Msg2 is the same, that is, Msg2.
  • the parameters included in it are the same.
  • TRP4 uses the PDCCH to schedule Msg2, and TRP3 and TRP4 send Msg2 of the same content on the same time-frequency resource at the same time.
  • Msg2 includes a backoff parameter, a Preamble code corresponding to Msg1, an uplink transmission timing advance (UL TA), and an uplink resource (UL grant).
  • UL TA uplink transmission timing advance
  • UL grant uplink resource
  • Step 5 UE3 successfully receives an Msg2 in the random response window.
  • UE3 Since TRP3 and TRP4 schedule Msg2 with C-RNTI scrambled PDCCH, UE3 completes the simplified random access procedure when receiving the scheduling command.
  • Embodiment 4 As shown in FIG. 18, a schematic diagram of random access under non-ideal forward/backhaul of a virtual cell according to an embodiment of the present invention.
  • Step 1 The virtual cell under the CU management includes TRP1 to TRP4, and the CU is configured with the same specific random access information of the four TRPs, including the Preamble code, the Root sequence, the Preamble transmission power, the PRACH time-frequency resource, and the random access response window. Conflict resolution timer, etc.
  • Step 2 TRP1 ⁇ TRP4 synchronously send the same specific random access information in the system information for competing random access.
  • Step 3 UE4 and UE5 initially access and initiate a contention random access procedure.
  • UE4 and UE5 acquire the same specific random access information sent by multiple TRPs (for example, TRP2, TRP3, and TRP4), and send Msg1.
  • TRPs for example, TRP2, TRP3, and TRP4.
  • UE4 and UE5 randomly select a certain Preamble code indicated in the specific random access information (for example, UE4 and UE5 select Preamble3), a certain PRACH time-frequency resource (for example, UE4 selects PRACH3, UE5 selects PRACH4), and UE4 is on PRACH3.
  • the Preamble 3 is transmitted, and the UE 5 transmits the Preamble 3 on the PRACH 4.
  • the UE4 and the UE5 receive a superposition of a plurality of synchronization signals, which facilitates the UE 4 and the UE 5 to accurately receive the specific random access information.
  • Step 4 The TRP2 and the TRP3 that are adjacent to the UE4 receive the Msg1 sent by the UE4, and the TRP3 and the TRP4 that are adjacent to the UE5 receive the Msg1 sent by the UE5.
  • TRP and the CU are non-ideal forward/backhaul (the delay is not ideal), in order to reduce access Delay, so 3 TRPs do not pass CU coordination to send Msg2.
  • the CU allocates different uplink resources and temporary C-RNTIs to the TRP1 to TRP4 that send the same specific random access information in the virtual cell in advance, and ensures that the C-RNTI does not conflict.
  • the three TRPs determine whether the condition is met according to the measurement information of the received Msg1, for example, whether the received signal strength and the signal quality satisfy the preset threshold, and the TRP that satisfies the condition recovers Msg2.
  • the RP of the TRP2 and the TRP3 is greater than the preset threshold (configured by the CU). Therefore, each of the TRP2 and the TRP3 generates Msg2 with different contents, and sends the Msg2, the uplink resource included in the Msg2, and the temporary C- in the random access response window.
  • Different RNTIs different fallback parameters, the same UL TA (UE4 is closer to TRP2 and TRP3), and the Preamble code corresponding to Msg1 is the same (for example, Preamble3), and the RA-RNTI used for addressing is the same (for example, RA-RNTI1, RA) - RNTI1 is determined by PRACH3).
  • TRP3 and TRP4 are greater than the preset threshold (configured by the CU). Therefore, TRP3 and TRP4 each generate Msg2 with different contents, and send Msg2 in the random access response window, and the uplink resource and temporary C included in Msg2.
  • the RNTI is different, the backoff parameters are different, the UL TA is the same (UE5 is relatively close to TRP3 and TRP4), and the Preamble code corresponding to Msg1 is the same (for example, Preamble3), and the RA-RNTI for addressing is the same (for example, RA-RNTI2, RA-RNTI2 is determined by PRACH4).
  • TRP2 and TRP3 use different PDCCH resources to schedule Msg2 at different times, and TRP3 and TRP4 use different PDCCH resources to schedule Msg2 at the same time.
  • Step 5 UE4 successfully receives two Msg2s in the random response window, and UE5 successfully receives two Msg2s in the random response window.
  • Step 6 Since UE4 receives 2 Msg2s sent by 2 TRPs in different subframes.
  • the UL grant is different from the temporary C-RNTI.
  • the UE4 selects one Msg2 received first (for example, Msg2 sent by the TRP2), and sends one Msg3 on the uplink resource.
  • the Msg3 includes the identifier information of the UE4 (for example, InitialUE-Identity1). .
  • the UE 5 Since the UE 5 receives two Msg2s transmitted by two TRPs in the same subframe, where the UL grant and the temporary C-RNTI are different, the UE 5 transmits Msg3, Msg3 scrambled by different temporary C-RNTIs on different uplink resources in the same subframe.
  • the identification information of the UE5 (for example, InitialUE-Identity2) is included.
  • Step 7 Since the Msg3 includes the identification information of the UE4, the CU needs to perform processing, so the TRP2 sends the Msg3 to the CU.
  • the CU identifies the UE4 by the identification information of the UE4, performs a contention resolution decision, and selects the TRP2 to transmit the Msg4.
  • TRP3 and TRP4 send two Msg3s to the CU, and report the measurement information of the received Msg3, including the received signal strength and signal quality.
  • the CU identifies the UE 5 by using the identification information of the UE 5, and determines that the UEs indicated in the Msg3 sent by the two TRPs are the same, thereby performing a contention resolution decision, and selecting the TRP4 with the largest SINR. Send Msg4.
  • the TRP2 receives the indication that the CU sends the Msg4, and sends the Msg4 before the conflict resolution timer expires.
  • the Msg4 includes the contention resolution information of the UE4.
  • the TRP4 receives the indication that the CU sends the Msg4, and sends the Msg4 before the conflict resolution timer expires.
  • the Msg4 includes the contention resolution information of the UE5.
  • Step 8 The UE4 and the UE5 receive the Msg4, which includes the contention resolution information of the UE4 and the UE5, and the UE4 and the UE5 consider that the contention resolution is successful, and complete the contention random access procedure.
  • the application can also be implemented in hardware and/or software (including firmware, resident software, microcode, etc.). Still further, the application can take the form of a computer program product on a computer usable or computer readable storage medium having computer usable or computer readable program code embodied in a medium for use by an instruction execution system or Used in conjunction with the instruction execution system.
  • a computer usable or computer readable medium can be any medium that can contain, store, communicate, communicate, or transport a program for use by an instruction execution system, apparatus or device, or in conjunction with an instruction execution system, Used by the device or device.

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Abstract

本发明实施例涉及无线通信技术领域,特别涉及一种进行随机接入的方法和设备,用以解决现有技术中存在的目前在网络密集部署场景下,由于每个小区覆盖范围比较小,UE在移动时,会频繁的读取小区的系统信息中的随机接入信息,导致UE耗电、处理复杂的问题。本发明实施例网络侧设备向终端发送与一个或多个其他网络侧设备相同的特定随机接入信息,终端通过多个网络侧设备发送的相同的特定随机接入信息进行随机接入。由于多个网络侧设备发送的相同的特定随机接入信息,使得终端不需要频繁的读取小区的系统信息中的随机接入信息,从而减少了终端耗电,降低了处理的复杂度;进一步提升系统性能。

Description

一种进行随机接入的方法和设备
本申请要求在2016年6月12日提交中国专利局、申请号为201610407288.3、发明名称为一种进行随机接入的方法和设备的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域,特别涉及一种进行随机接入的方法和设备。
背景技术
竞争随机接入是指eNB(演进基站)没有为UE(终端)分配专用Preamble(前导)码,而是由UE随机选择Preamble码并发起的随机接入。竞争随机接入过程分4步,如图1A所示。其中,每一步称为一条消息(message),将这4步称为Msg1~Msg4。
Msg1:发送Preamble码。
eNB负责对Preamble码以及用于发送Preamble码的PRACH(Physical Random Access Channel,物理随机接入信道)资源进行配置,通过SI(System Information,系统消息)将配置广播到小区内驻留的UE
Msg2:随机接入响应。
eNB在随机接入响应窗内发送Msg2;
UE在随机接入响应窗内接收Msg2,如果接收失败,则根据backoff(回退)时延参数,确定发起下一次随机接入的时刻,并选择随机接入资源发起下一次随机接入。
Msg3:第一次调度传输。
UE在分配的上行资源上传输Msg3。
Msg4:竞争解决。
Msg4包含竞争解决相关的信息,UE收到后,认为竞争解决成功。
UE在竞争解决定时器超时都没有收到Msg4,认为竞争解决失败,则根据backoff时延参数,确定发起下一次随机接入的时刻,并选择随机接入资源发起下一次随机接入。
非竞争随机接入是UE根据eNB指示,在指定的PRACH信道资源上使用指定的Preamble码发起的随机接入。非竞争随机接入分为3步,如图1B所示。其中,将这3步称为Msg0~Msg2。
Msg0:随机接入指示。
eNB在切换和下行数据到达时会主动要求指定UE发起随机接入过程。
Msg0包含UE发起非竞争随机接入使用的Preamble码和PRACH信道资源。
Msg1:发送Preamble码。
UE在eNB指定的PRACH信道资源上用指定的Preamble码发起随机接入。如果指定了多个PRACH信道资源,UE在第一个可用的有PRACH信道资源的子帧中随机选择一个指定的PRACH信道资源用于承载Msg1。
Msg2:随机接入响应。
Msg2的格式和内容与竞争随机接入相同。
UE在随机接入响应窗内没有收到随机接入响应,则判断本次非竞争随机接入失败,在下一个指定的PRACH信道资源上用指定的Preamble码发起随机接入,不受backoff参数的限制。
目前,每个小区的Preamble码等接入信息是不同的,UE在驻留到某个小区下按照系统信息的指示发起随机接入过程,只有对应的小区才能收到并进行反馈。而在网络密集部署场景下,每个小区覆盖范围比较小,UE在移动时,会频繁的读取小区的系统信息中的随机接入信息,导致UE耗电、处理复杂。
综上所述,目前在网络密集部署场景下,由于每个小区覆盖范围比较小,UE在移动时,会频繁的读取小区的系统信息中的随机接入信息,导致UE耗电、处理复杂。
发明内容
本发明实施例提供一种进行随机接入的方法和设备,用以解决现有技术中存在的目前在网络密集部署场景下,由于每个小区覆盖范围比较小,UE在移动时,会频繁的读取小区的系统信息中的随机接入信息,导致UE耗电、处理复杂的问题。
本发明实施例提供的一种进行随机接入的方法,该方法包括:
网络侧设备确定与一个或多个其他网络侧设备相同的特定随机接入信息;
所述网络侧设备将所述特定随机接入信息发送给终端,以使所述终端通过所述随机接入信息进行接入。
可选的,所述网络侧设备确定与一个或多个其他网络侧设备相同的随机接入信息,包括:
所述网络侧设备接收来自控制设备的所述特定随机接入信息。
可选的,所述网络侧设备将所述特定随机接入信息发送给终端,包括:
所述网络侧设备通过广播或专用信令将所述特定随机接入信息发送给终端。
可选的,所述网络侧设备将所述特定随机接入信息发送给终端之后,还 包括:
所述网络侧设备接收所述终端发送的包含所述随机接入信息中的前导码的第一消息;
所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述网络侧设备接收所述终端发送的包含所述随机接入信息中的前导码的第一消息之后,在随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
所述网络侧设备将所述第一消息上报给所述控制设备,并确定收到所述控制设备的第一发送指示。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
所述网络侧设备与收到所述第一发送指示的其他网络侧设备在相同时刻使用物理下行控制信道PDCCH调度所述第二消息,并通过RA-RNTI寻址;
所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
所述网络侧设备与收到所述第一发送指示的其他网络侧设备发送包含相同随机接入响应信息的第二消息。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
所述网络侧设备与收到所述第一发送指示的其他网络侧设备在同一时刻通过相同的时频资源发送包含相同的随机接入响应信息的第二消息。
可选的,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
所述网络侧设备根据所述控制设备配置的上行资源和临时小区无线网络临时标识符C-RNTI,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
所述网络侧设备根据接收第一消息的测量信息确定满足发送条件。
可选的,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息之后,还包括:
所述网络侧设备将收到的所述终端的包含竞争信息的第三消息以及接收所述第三消息的测量信息发送给所述控制设备;
所述网络侧设备在收到所述控制设备的第二发送指示后,向所述终端发送包含竞争解决信息的第四消息。
本发明实施例提供的一种进行随机接入的方法,该方法包括:
控制设备确定特定随机接入信息;
所述控制设备将所述特定随机接入信息发送给多个网络侧设备,以使所述多个网络侧设备将所述特定随机接入信息发送给终端,由所述终端通过所述随机接入信息进行接入。
可选的,所述控制设备将所述特定随机接入信息发送给多个网络侧设备之后,还包括:
所述控制设备接收多个网络侧设备上报的由同一个终端发送的包含所述随机接入信息中的前导码的第一消息;
所述控制设备从所述多个网络侧设备中选择至少一个网络侧设备,并将第一发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含随机接入响应信息的第二消息。
可选的,所述控制设备从所述多个网络侧设备中选择至少一个网络侧设备,包括:
所述控制设备根据每个网络侧设备接收第一消息的测量信息,从所述多个网络侧设备中选择至少一个网络侧设备。
可选的,所述方法还包括:
所述控制设备为所述多个网络侧设备分配不同的上行资源和临时C-RNTI,以使所述网络侧设备在收到终端发送的包含所述随机接入信息中的前导码的第一消息后,通过所述上行资源和临时C-RNTI在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述控制设备将所述特定随机接入信息发送给多个网络侧设备之后,还包括:
所述控制设备接收多个网络侧设备上报的由同一个终端发送的包含竞争信息的第三消息以及所述多个网络侧设备接收所述第三消息的测量信息发送给所述控制设备;
所述控制设备根据每个网络侧设备接收第三消息的测量信息,从多个网络侧设备选择至少一个网络侧设备,并将第二发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含竞争解决信息的第四消息。
本发明实施例提供的一种进行随机接入的方法,该方法包括:
终端接收多个网络侧设备发送的相同的特定随机接入信息;
所述终端根据所述特定随机接入信息进行随机接入。
可选的,所述终端根据所述特定随机接入信息进行随机接入,包括:
所述终端通过所述特定随机接入信息中的时频资源,向多个网络侧设备 中的部分或全部网络侧设备发送包含所述特定随机接入信息中的前导码的第一消息;
所述终端接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息。
可选的,所述终端将所述特定随机接入信息中与所述终端绑定的前导码置于所述第一消息中。
可选的,所述终端将终端标识置于所述第一消息中。
可选的,所述终端接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息之后,还包括:
所述终端向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息;
所述终端接收至少一个网络侧设备发送的包含竞争解决信息的第四消息。
可选的,所述终端收到多个第二消息;所述终端向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息,包括:
若所述多个第二消息中的上行链路定时提前UL TA不同,则所述终端选择至少一个UL TA,并根据选择的UL TA发送包含竞争信息的第三消息;或
若所述多个第二消息中的上行链路授权UL grant和临时C-RNTI不同,则所述终端选择至少一组UL grant和临时C-RNTI,并根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息。
可选的,所述终端根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息,包括:
所述终端在需要发送多个第三消息时,根据选择的UL grant,在同一个子帧的不同上行资源上发送采用不同临时C-RNTI加扰的所述第三消息。
本发明实施例提供的一种进行随机接入的网络侧设备,该网络侧设备包括:
第一信息确定模块,用于确定与一个或多个其他网络侧设备相同的特定随机接入信息;
第一处理模块,用于将所述特定随机接入信息发送给终端,以使所述终端通过所述随机接入信息进行接入。
可选的,所述第一信息确定模块具体用于:
接收来自控制设备的所述特定随机接入信息。
可选的,所述第一处理模块具体用于:
通过广播或专用信令将所述特定随机接入信息发送给终端。
可选的,所述第一处理模块还用于:
接收所述终端发送的包含所述随机接入信息中的前导码的第一消息;在 随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述第一处理模块还用于:
将所述第一消息上报给所述控制设备,并在确定收到所述控制设备的第一发送指示后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述第一处理模块还用于:
与收到所述第一发送指示的其他网络侧设备在相同时刻使用PDCCH调度所述第二消息,并通过RA-RNTI寻址;与收到所述第一发送指示的其他网络侧设备发送包含相同随机接入响应信息的第二消息。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述第一处理模块具体用于:
与收到所述第一发送指示的其他网络侧设备在同一时刻通过相同的时频资源发送包含相同的随机接入响应信息的第二消息。
可选的,所述第一处理模块具体用于:
根据所述控制设备配置的上行资源和临时C-RNTI,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述第一处理模块还用于:
在根据接收第一消息的测量信息确定满足发送条件后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述第一处理模块还用于:
在随机接入响应窗中发送包含随机接入响应信息的第二消息之后,将收到的所述终端的包含竞争信息的第三消息以及接收所述第三消息的测量信息发送给所述控制设备;在收到所述控制设备的第二发送指示后,向所述终端发送包含竞争解决信息的第四消息。
本发明实施例提供的一种进行随机接入的控制设备,该控制设备包括:
第二信息确定模块,用于确定特定随机接入信息;
第二处理模块,用于将所述特定随机接入信息发送给多个网络侧设备,以使所述多个网络侧设备将所述特定随机接入信息发送给终端,由所述终端通过所述随机接入信息进行接入。
可选的,所述第二处理模块还用于:
将所述特定随机接入信息发送给多个网络侧设备之后,接收多个网络侧设备上报的由同一个终端发送的包含所述随机接入信息中的前导码的第一消息;从所述多个网络侧设备中选择至少一个网络侧设备,并将第一发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含随机接入响应信息的第二消息。
可选的,所述第二处理模块具体用于:
根据每个网络侧设备接收第一消息的测量信息,从所述多个网络侧设备中选择至少一个网络侧设备。
可选的,所述第二处理模块还用于:
为所述多个网络侧设备分配不同的上行资源和临时C-RNTI,以使所述网络侧设备在收到终端发送的包含所述随机接入信息中的前导码的第一消息后,通过所述上行资源和临时C-RNTI在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述第二处理模块还用于:
将所述特定随机接入信息发送给多个网络侧设备之后,接收多个网络侧设备上报的由同一个终端发送的包含竞争信息的第三消息以及所述多个网络侧设备接收所述第三消息的测量信息发送给所述控制设备;根据每个网络侧设备接收第三消息的测量信息,从多个网络侧设备选择至少一个网络侧设备,并将第二发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含竞争解决信息的第四消息。
本发明实施例提供的一种进行随机接入的终端,该终端包括:
接收模块,用于接收多个网络侧设备发送的相同的特定随机接入信息;
接入模块,用于根据所述特定随机接入信息进行随机接入。
可选的,所述接入模块具体用于:
通过所述特定随机接入信息中的时频资源,向多个网络侧设备中的部分或全部网络侧设备发送包含所述特定随机接入信息中的前导码的第一消息;接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息。
可选的,所述接入模块还用于:
将所述特定随机接入信息中与所述终端绑定的前导码置于所述第一消息中。
可选的,所述接入模块还用于:
将终端标识置于所述第一消息中。
可选的,所述接入模块还用于:
接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息之后,向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息;接收至少一个网络侧设备发送的包含竞争解决信息的第四消息。
可选的,所述终端收到多个第二消息;
所述接入模块具体用于:
若所述多个第二消息中的UL TA不同,则选择至少一个UL TA,并根据选择的UL TA发送包含竞争信息的第三消息;或
若所述多个第二消息中的UL grant和临时C-RNTI不同,则选择至少一 组UL grant和临时C-RNTI,并根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息。
可选的,所述接入模块具体用于:
在需要发送多个第三消息时,根据选择的UL grant,在同一个子帧的不同上行资源上发送采用不同临时C-RNTI加扰的所述第三消息。
本发明实施例提供的一种进行随机接入的网络侧设备,该网络侧设备包括存储器、处理器和收发机;其中,
所述存储器用于存储计算机可读程序;
所述处理器通过运行所述存储器中的程序,以完成本发明实施例提供的一种进行随机接入的方法中网络侧设备执行方方法;
所述收发机用于在所述处理器的控制下接收和发送数据。
本发明实施例提供的一种进行随机接入的控制设备,该控制设备包括存储器、处理器和收发机;其中,
所述存储器用于存储计算机可读程序;
所述处理器通过运行所述存储器中的程序,以完成本发明实施例提供的一种进行随机接入的方法中控制设备执行方方法;
所述收发机用于在所述处理器的控制下接收和发送数据。
本发明实施例提供的一种进行随机接入的终端,该终端包括存储器、处理器和收发机;其中,
所述存储器用于存储计算机可读程序;
所述处理器通过运行所述存储器中的程序,以完成本发明实施例提供的一种进行随机接入的方法中终端执行方方法;
所述收发机用于在所述处理器的控制下接收和发送数据。
本发明实施例网络侧设备向终端发送与一个或多个其他网络侧设备相同的特定随机接入信息,终端通过多个网络侧设备发送的相同的特定随机接入信息进行随机接入。由于多个网络侧设备发送的相同的特定随机接入信息,使得终端不需要频繁的读取小区的系统信息中的随机接入信息,从而减少了终端耗电,降低了处理的复杂度;进一步提升系统性能。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简要介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域的普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1A为背景技术中竞争随机接入的示意图;
图1B为背景技术中非竞争随机接入的示意图;
图2A为本发明实施例5G场景每个TRP(Transmission Reception Point,传输接收点)为一个小区的示意图;
图2B为本发明实施例5G场景多个TRP为一个小区的示意图;
图3为本发明实施例进行随机接入的系统结构示意图;
图4为本发明实施例第一种网络侧设备的结构示意图;
图5为本发明实施例第一种控制设备的结构示意图;
图6为本发明实施例第一种终端的结构示意图;
图7为本发明实施例第二种网络侧设备的结构示意图;
图8为本发明实施例第二种控制设备的结构示意图;
图9为本发明实施例第二种终端的结构示意图;
图10为本发明实施例第一种进行随机接入的方法流程示意图;
图11为本发明实施例第二种进行随机接入的方法流程示意图;
图12为本发明实施例第三种进行随机接入的方法流程示意图;
图13为本发明实施例非竞争随机接入的方法流程示意图;
图14为本发明实施例竞争随机接入的方法流程示意图;
图15为本发明实施例多TRP小区理想前传/回传下随机接入示意图;
图16为本发明实施例多TRP小区非理想前传/回传下随机接入示意图;
图17为本发明实施例虚拟小区理想前传/回传下随机接入示意图;
图18为本发明实施例虚拟小区非理想前传/回传下随机接入示意图。
具体实施方式
本发明实施例网络侧设备向终端发送与一个或多个其他网络侧设备相同的特定随机接入信息,终端通过多个网络侧设备发送的相同的特定随机接入信息进行随机接入。由于多个网络侧设备发送的相同的特定随机接入信息,使得终端不需要频繁的读取小区的系统信息中的随机接入信息,从而减少了终端耗电,降低了处理的复杂度;进一步提升系统性能。
本发明实施例的方案可以应用于任何网络密集部署的场景。下面列举一种网络密集部署的场景。
如图2A和图2B所示,5G场景为网络密集部署的场景。
1、CU(central unit,集中节点):
集中节点又称为中央处理单元,也可以称为控制设备,可以管理和控制多个传输接收点TRP,CU可以是一个高层节点。例如,独立的接入网节点:本地网关(Local Gateway)或本地控制器(Local Controller),或者核心网节点或者OAM(Operation Administration and Maintenance,操作、管理和维护)节点;也可以是一个基站,该基站由于可以管理多个基站,可以看作超级基站;也可以是C-RAN架构中的基带池(其中,本发明实施例的C-RAN可以 是集中化无线接入网(Centralized-RAN);也可以是云化无线接入网(Cloud-RAN)),集中处理多个RRH(Remote Radio Head,射频拉远头)的基带信号;也可以是有部分协议栈功能的CU。
2、基站:
基站又称为TRP(Transmission Reception Point,传输接收点),TRP可以是宏站,如eNB、NB(基站)等;也可以是小站,如LPN(low power node,低功率节点),AP(Access Point,接入点)等;也可以是C-RAN架构中的RRH;也可以是有部分协议栈功能的DU(Distributed Unit,分布式单元)。一个TRP下有一个或多个小区(不同的频点或扇区分裂),或者一个或多个TRP组成一个虚拟小区(Virtual Cell)。
5G网络下,众多TRP由一个集中节点CU控制,一个TRP下一个TRP小区,或者多个TRP组成一个虚拟小区,TRP和CU之间是理想前传(fronthaul)/回传(backhaul)或非理想前传/回传。
5G网络密集部署场景下,TRP的工作频率为6GHz以下或6GHz以上高频段,典型的工作频段:6GHz以下,3.4GHz~3.6GHz(LTE TDD Band 42);6GHz以上,室外高频段30GHz,室内高频段70GHz。
为了使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明作进一步地详细描述,显然,所描述的实施例仅仅是本发明一部份实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
如图3所示,本发明实施例进行随机接入的系统包括:网络侧设备10、控制设备20和终端30。
网络侧设备10,用于确定与一个或多个其他网络侧设备相同的特定随机接入信息;将所述特定随机接入信息发送给终端;
控制设备20,用于确定特定随机接入信息;将所述特定随机接入信息发送给多个网络侧设备;
终端30,用于接收多个网络侧设备发送的相同的特定随机接入信息;根据所述特定随机接入信息进行随机接入。
本发明实施例控制设备可以为多个网络侧设备配置相同的特定随机接入信息;
相应的,网络侧设备接收来自控制设备的所述特定随机接入信息。
其中,特定随机接入信息包括但不限于下列信息中的部分或全部:
Preamble码、Root sequence(根序列)、Preamble发送功率、PRACH时频资源、随机接入响应窗、冲突解决定时器。
在实施中,控制设备可以将自身管理的部分或全部网络侧设备分配相同 的特定随机接入信息;也可以将网络侧设备按照区域进行划分,将处于同一区域的网络侧设备分配相同的特定随机接入信息。
可选的,所述网络侧设备通过广播或专用信令(比如on-demand方式)将所述特定随机接入信息发送给终端。
特定随机接入信息可用于竞争随机接入或非竞争随机接入过程。例如,系统信息里广播的是用于竞争随机接入的特定随机接入信息,而专有信令发送的是用于非竞争随机接入的特定随机接入信息。在实施中,多个TRP可以同步发送特定随机接入信息。
终端在收到多个网络侧设备发送的相同的特定随机接入信息,如果特定随机接入信息中有前导(Preamble)码,终端可以随机选择前导码;如果特定随机接入信息中有PRACH时频资源,则可以随机选择PRACH时频资源。
终端可以通过选择的PRACH时频资源发送包含选择的前导码的第一消息(即Msg1)。
如果多个网络侧设备同步发送特定随机接入信息,则终端接收时是多个同步信号的叠加,有利于终端准确的接收随机接入信息。
对于竞争随机接入,多个终端可能选择相同的Preamble码以及不同的PRACH时频资源;或者不同的Preamble码以及相同的PRACH时频资源,因此需要进行竞争解决。
对于非竞争随机接入,第一消息对应的随机接入信息与终端标识进行绑定或映射(mapping),因此不需要进行竞争解决。
可选的,所述终端将所述特定随机接入信息中与所述终端绑定的前导码置于所述第一消息中。
其中,与所述终端绑定的终端标可以是网络侧配置给终端的,比如控制设备通过Msg0发送给网络侧设备,并由网络侧设备发送给终端。
可选的,所述终端通过所述特定随机接入信息中的时频资源,向多个网络侧设备中的部分或全部网络侧设备发送包含所述特定随机接入信息中的前导码的第一消息;
所述网络侧设备接收所述终端发送的包含所述随机接入信息中的前导码的第一消息;
所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息(即Msg2);
所述终端接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息。
网络侧设备在随机接入响应窗内发送第二消息的方式有两种,一种是网络侧设备和控制设备之间是理想前传/回传的方式,另一种是网络侧设备和控制设备之间是非理想前传/回传的方式,下面详细进行介绍。
一、网络侧设备和控制设备之间是理想前传/回传的方式。
这种方式,网络侧设备接收所述终端发送的包含所述随机接入信息中的前导码的第一消息之后,将所述第一消息上报给所述控制设备;
相应的,所述控制设备接收多个网络侧设备上报的由同一个终端发送的包含所述随机接入信息中的前导码的第一消息;
所述控制设备从所述多个网络侧设备中选择至少一个网络侧设备,并将第一发送指示通知选择的所述网络侧设备;
所述网络侧设备确定收到所述控制设备的第一发送指示后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述控制设备从所述多个网络侧设备中选择至少一个网络侧设备时,可以根据每个网络侧设备接收第一消息的测量信息,从所述多个网络侧设备中选择至少一个网络侧设备。
比如控制设备选择接收信号最好的网络侧设备回复第二消息,或者从多个接收信号满足条件的网络侧设备中选择部分或全部网络侧设备回复相同的第二消息。
具体的,控制设备根据测量信息选择接收信号强度最大的网络侧设备;或者
控制设备根据测量信息选择信号质量最好的网络侧设备;或者
控制设备根据测量信息选择接收信号强度满足第一门限和/或信号质量满足满足第二门限的部分或全部网络侧设备。可选的,如果选择多个网络侧设备,则多个网络侧设备回复相同的第二消息,这样可以是为了进行可靠性传输。第一门限和第二门限可以是控制设备配置的,也可以是网络侧设备配置的,也可以是人工配置的。
一个或多个网络侧设备收到第一发送指示后,在随机接入响应窗内发送第二消息。由于通过控制设备进行协调处理,当多个网络侧设备发送第二消息时,可以是多点发送分集传输,相当于SFN(Single Frequency Network,单频网)传输。
可选的,所述网络侧设备与收到所述第一发送指示的其他网络侧设备在相同时刻使用PDCCH(Physical Downlink Control Channel,物理下行控制信道)调度所述第二消息,并通过RA-RNTI寻址;
所述网络侧设备与收到所述第一发送指示的其他网络侧设备发送包含相同随机接入响应信息的第二消息。
具体的,多个网络侧设备在同一时刻使用PDCCH调度第二设备,并通过RA-RNTI进行寻址;
多个网络侧设备在相同的PDCCH资源(例如CCE)上调度第二消息,调度的第二消息的内容是相同的,即Msg2中包含的参数是相同的。或者多个 网络侧设备中的一个网络侧设备使用PDCCH调度第二消息,多个网络侧设备在同一时刻相同的时频资源上发送相同内容的第二消息。如果是一个网络侧设备调度第二消息,则发送这个第二消息的资源可以是控制设备告知其他网络侧设备,实现多个网络侧设备同时发送相同的第二消息。当然也可以在协议中规定。
二、网络侧设备和控制设备之间是非理想前传/回传的方式。
这种方式是为了减少接入时延,因此多个网络侧设备发送第二消息不经过控制设备协调。
如果非理想前传/回传为时延理想,吞吐量不理想的情况,可进行控制设备协调的第二消息发送,与理想前传/回传的操作类似,在此不再赘述。
以下为非理想前传/回传时延不理想情况下的操作。
所述控制设备为所述多个网络侧设备分配不同的上行资源和临时C-RNTI;
相应的,所述网络侧设备在收到终端发送的包含所述随机接入信息中的前导码的第一消息后,根据所述控制设备配置的上行资源和临时CRNTI,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
具体的,控制设备预先为发送相同随机接入信息的多个网络侧设备分配不同的上行资源和临时C-RNTI(Cell Radio Network Temporary Identifier,小区无线网络临时标识符),保证不冲突。
多个网络侧设备收到终端发送的第一消息后,各网络侧设备产生第二消息,并在随机接入响应窗内发送第二消息。其中,多个网络侧设备产生的第二消息可以相同,也可以不同;如果不同,则第二消息中包含的上行资源和临时C-RNTI(与RA-RNTI(random access-radio network temporary identifier,随机接入-无线网络临时标识)类似,作用为寻址)不同,回退参数、UL TA(uplink timing advance,上行链路定时提前)可以相同或不同,与第一消息对应的Preamble码相同,用于寻址的RA-RNTI相同。
进一步的,所述网络侧设备根据接收第一消息的测量信息判断是否满足发送条件,并在确定满足发送条件后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
多个网络侧设备根据接收第一消息的测量信息判断是否满足条件,例如接收信号强度是否满足第三门限值和/或信号质量是否满足第四门限值,满足条件的网络侧设备回复第二消息。
为了减少接入延时,所述终端将终端标识置于所述第一消息中,用于简化随机接入过程,例如将4步随机接入变成2步随机接入。
由于第一消息中包含终端标识信息,控制设备要通过终端标识信息,获取终端的context(上下文),这个过程需要控制设备和CN(核心网)进行交 互(例如初始接入时的鉴权、认证等过程,或者切换时识别UE),因此多个网络侧设备将第一消息发送给控制设备,由控制设备调度网络侧设备发送第二消息,这种方式与理想前传/回传的操作类似,在此不再赘述。由于控制设备通过第一消息已经识别出终端,因此终端不需要进行竞争解决。
对于非竞争随机接入过程,终端在随机响应窗内成功收到一个或多个第二消息就结束介入过程。
如果终端接收失败,则根据backoff(回退)时延参数,确定发起下一次随机接入的时刻,并选择随机接入资源发起下一次随机接入。
对于竞争随机接入过程,由于终端需要进行竞争解决,因此终端在随机响应窗内成功收到一个或多个第二消息之后向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息。
相应的,所述网络侧设备将收到的所述终端的包含竞争信息的第三消息以及接收所述第三消息的测量信息发送给所述控制设备;
所述控制设备接收多个网络侧设备上报的由同一个终端发送的包含竞争信息的第三消息以及所述多个网络侧设备接收所述第三消息的测量信息发送给所述控制设备;
所述控制设备根据每个网络侧设备接收第三消息的测量信息,从多个网络侧设备选择至少一个网络侧设备,并将第二发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含竞争解决信息的第四消息;
所述网络侧设备在收到所述控制设备的第二发送指示后,向所述终端发送包含竞争解决信息的第四消息;
所述终端接收至少一个网络侧设备发送的包含竞争解决信息的第四消息。
其中,终端发送的第三消息中包含终端标识信息(例如,InitialUE-Identity(初始终端标识)或者ReestabUE-Identity(重建终端标识))和/或终端的C-RNTI。
如果终端在随机响应窗内收到一个第二消息,则终端根据第二消息中包含的信息发送第三消息。
如果终端在随机响应窗内收到多个网络侧设备发送的多个第二消息,则终端可以选择一个或多个第二消息,并根据选择的第二消息中的信息发送第三消息。具体的,如果多个第二消息中包含的UL TA不同,则终端选择一个UL TA发送一个或多个第三消息。如果多个第二消息中包含的UL grant和临时C-RNTI不同,则中终端可以选择一组或多组UL grant(上行链路授权)和临时C-RNTI发送一个或多个第三消息。
具体的,若所述多个第二消息中的UL TA不同,则所述终端选择至少一个UL TA,并根据选择的UL TA发送包含竞争信息的第三消息;或
若所述多个第二消息中的UL grant和临时C-RNTI不同,则所述终端选择至少一组UL grant和临时C-RNTI,并根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息。
进一步的,终端在同一子帧收到多个网络侧设备发送的多个第二消息,且所述终端发送多个第三消息时,如果UL grant和临时C-RNTI不同,那么UE在同一子帧不同上行资源上发送内容相同但是经过不同加扰的第三消息。即所述终端根据选择的UL grant,在同一个子帧的不同上行资源上发送采用不同临时C-RNTI加扰的所述第三消息,其中需要发送的多个第三消息的内容相同。
由于第三消息中包含中的标识信息和/或终端的C-RNTI,需要控制设备进行处理,因此一个或多个网络侧设备将第三消息发送给控制设备,同时上报接收第三消息的测量信息,包括接收信号强度、信号质量等。
控制设备通过终端标识信息和/或终端的C-RNTI识别出终端,进行竞争解决判决,并调度网络侧设备发送第四消息,即选择最好的网络侧设备发送第四消息或满足条件的多个网络侧设备发送相同的第四消息。
具体的,如果一个或多个网络侧设备发送的第三消息中指示的终端是相同的,则控制设备进行竞争解决判决,并调度网络侧设备发送第四消息,第四消息中包含此终端的竞争解决信息;
如果一个或多个网络侧设备发送的第三消息中指示的终端是不同的,则控制设备进行竞争解决判决,并调度网络侧设备发送第四消息,不同的第四消息中包含不同终端的竞争解决信息。
终端收到包含竞争解决相关的信息第四消息后,认为竞争解决成功。
如果终端接收第二消息失败,则根据backoff时延参数,确定发起下一次随机接入的时刻,并选择随机接入资源发起下一次随机接入。
如果终端接收第四消息失败,则根据backoff时延参数,确定发起下一次随机接入的时刻,并选择随机接入资源发起下一次随机接入。
其中,本发明实施例的网络侧设备可以是基站,这里基站也可以称为TRP,TRP可以是宏站,如eNB、NB等;本发明实施例的网络侧设备也可以是小站如LPN、AP等;本发明实施例的网络侧设备也可以是C-RAN架构中的RRH;本发明实施例的网络侧设备也可以是有部分协议栈功能的DU。
如图4所示,本发明实施例第一种网络侧设备包括:
第一信息确定模块400,用于确定与一个或多个其他网络侧设备相同的特定随机接入信息;
第一处理模块401,用于将所述特定随机接入信息发送给终端,以使所述终端通过所述随机接入信息进行接入。
可选的,所述第一信息确定模块400具体用于:
接收来自控制设备的所述特定随机接入信息。
可选的,所述第一处理模块401具体用于:
通过广播或专用信令将所述特定随机接入信息发送给终端。
可选的,所述第一处理模块401还用于:
接收所述终端发送的包含所述随机接入信息中的前导码的第一消息;在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述第一处理模块401还用于:
将所述第一消息上报给所述控制设备,并在确定收到所述控制设备的第一发送指示后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述第一处理模块401还用于:
与收到所述第一发送指示的其他网络侧设备在相同时刻使用PDCCH调度所述第二消息,并通过RA-RNTI寻址;与收到所述第一发送指示的其他网络侧设备发送包含相同随机接入响应信息的第二消息。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述第一处理模块401具体用于:
与收到所述第一发送指示的其他网络侧设备在同一时刻通过相同的时频资源发送包含相同的随机接入响应信息的第二消息。
可选的,所述第一处理模块401具体用于:
根据所述控制设备配置的上行资源和临时CRNTI,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述第一处理模块401还用于:
在根据接收第一消息的测量信息确定满足发送条件后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述第一处理模块401还用于:
在随机接入响应窗中发送包含随机接入响应信息的第二消息之后,将收到的所述终端的包含竞争信息的第三消息以及接收所述第三消息的测量信息发送给所述控制设备;在收到所述控制设备的第二发送指示后,向所述终端发送包含竞争解决信息的第四消息。
如图5所示,本发明实施例第一种控制设备包括:
第二信息确定模块500,用于确定特定随机接入信息;
第二处理模块501,用于将所述特定随机接入信息发送给多个网络侧设备,以使所述多个网络侧设备将所述特定随机接入信息发送给终端,由所述终端通过所述随机接入信息进行接入。
可选的,所述第二处理模块501还用于:
将所述特定随机接入信息发送给多个网络侧设备之后,接收多个网络侧 设备上报的由同一个终端发送的包含所述随机接入信息中的前导码的第一消息;从所述多个网络侧设备中选择至少一个网络侧设备,并将第一发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含随机接入响应信息的第二消息。
可选的,所述第二处理模块501具体用于:
根据每个网络侧设备接收第一消息的测量信息,从所述多个网络侧设备中选择至少一个网络侧设备。
可选的,所述第二处理模块501还用于:
为所述多个网络侧设备分配不同的上行资源和临时C-RNTI,以使所述网络侧设备在收到终端发送的包含所述随机接入信息中的前导码的第一消息后,通过所述上行资源和临时C-RNTI在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述第二处理模块501还用于:
将所述特定随机接入信息发送给多个网络侧设备之后,接收多个网络侧设备上报的由同一个终端发送的包含竞争信息的第三消息以及所述多个网络侧设备接收所述第三消息的测量信息发送给所述控制设备;根据每个网络侧设备接收第三消息的测量信息,从多个网络侧设备选择至少一个网络侧设备,并将第二发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含竞争解决信息的第四消息。
如图6所示,本发明实施例第一种终端包括:
接收模块600,用于接收多个网络侧设备发送的相同的特定随机接入信息;
接入模块601,用于根据所述特定随机接入信息进行随机接入。
可选的,所述接入模块601具体用于:
通过所述特定随机接入信息中的时频资源,向多个网络侧设备中的部分或全部网络侧设备发送包含所述特定随机接入信息中的前导码的第一消息;接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息。
可选的,所述接入模块601还用于:
将所述特定随机接入信息中与所述终端绑定的前导码置于所述第一消息中。
可选的,所述接入模块601还用于:
将终端标识置于所述第一消息中。
可选的,所述接入模块601还用于:
接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息之后,向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的 第三消息;接收至少一个网络侧设备发送的包含竞争解决信息的第四消息。
可选的,所述终端收到多个第二消息;
所述接入模块601具体用于:
若所述多个第二消息中的UL TA不同,则选择至少一个UL TA,并根据选择的UL TA发送包含竞争信息的第三消息;或
若所述多个第二消息中的UL grant和临时C-RNTI不同,则选择至少一组UL grant和临时C-RNTI,并根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息。
可选的,所述接入模块601具体用于:
在需要发送多个第三消息时,根据选择的UL grant,在同一个子帧的不同上行资源上发送采用不同临时C-RNTI加扰的所述第三消息。
如图7所示,本发明实施例第二种网络侧设备包括:
处理器701,用于读取存储器704中的程序,执行下列过程:
确定与一个或多个其他网络侧设备相同的特定随机接入信息;通过收发机702将所述特定随机接入信息发送给终端,以使所述终端通过所述随机接入信息进行接入。
收发机702,用于在处理器701的控制下接收和发送数据。
可选的,所述处理器701具体用于:
接收来自控制设备的所述特定随机接入信息。
可选的,所述处理器701具体用于:
通过广播或专用信令将所述特定随机接入信息发送给终端。
可选的,所述处理器701还用于:
接收所述终端发送的包含所述随机接入信息中的前导码的第一消息;在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述处理器701还用于:
将所述第一消息上报给所述控制设备,并在确定收到所述控制设备的第一发送指示后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述处理器701还用于:
与收到所述第一发送指示的其他网络侧设备在相同时刻使用PDCCH调度所述第二消息,并通过RA-RNTI寻址;与收到所述第一发送指示的其他网络侧设备发送包含相同随机接入响应信息的第二消息。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述处理器701具体用于:
与收到所述第一发送指示的其他网络侧设备在同一时刻通过相同的时频资源发送包含相同的随机接入响应信息的第二消息。
可选的,所述处理器701具体用于:
根据所述控制设备配置的上行资源和临时C-RNTI,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述处理器701还用于:
在根据接收第一消息的测量信息确定满足发送条件后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述处理器701还用于:
在随机接入响应窗中发送包含随机接入响应信息的第二消息之后,将收到的所述终端的包含竞争信息的第三消息以及接收所述第三消息的测量信息发送给所述控制设备;在收到所述控制设备的第二发送指示后,向所述终端发送包含竞争解决信息的第四消息。
其中,上述处理器701的发送和接收都是通过收发机702进行的。
在图7中,总线架构(用总线700来代表),总线700可以包括任意数量的互联的总线和桥,总线700将包括由处理器701代表的一个或多个处理器和存储器704代表的存储器的各种电路链接在一起。总线700还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口703在总线700和收发机702之间提供接口。收发机702可以是一个元件,也可以是多个元件,比如多个接收器和发送器,提供用于在传输介质上与各种其他装置通信的单元。经处理器701处理的数据通过天线705在无线介质上进行传输,进一步,天线705还接收数据并将数据传送给处理器701。
处理器701负责管理总线700和通常的处理,还可以提供各种功能,包括定时,外围接口,电压调节、电源管理以及其他控制功能。而存储器704可以被用于存储处理器701在执行操作时所使用的数据。
可选的,处理器701可以是CPU(中央处埋器)、ASIC(Application Specific Integrated Circuit,专用集成电路)、FPGA(Field-Programmable Gate Array,现场可编程门阵列)或CPLD(Complex Programmable Logic Device,复杂可编程逻辑器件)。
如图8所示,本发明实施例第二种控制设备包括:
处理器801,用于读取存储器804中的程序,执行下列过程:
确定特定随机接入信息;通过收发机802将所述特定随机接入信息发送给多个网络侧设备,以使所述多个网络侧设备将所述特定随机接入信息发送给终端,由所述终端通过所述随机接入信息进行接入。
收发机802,用于在处理器801的控制下接收和发送数据。
可选的,所述处理器801还用于:
将所述特定随机接入信息发送给多个网络侧设备之后,接收多个网络侧 设备上报的由同一个终端发送的包含所述随机接入信息中的前导码的第一消息;从所述多个网络侧设备中选择至少一个网络侧设备,并将第一发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含随机接入响应信息的第二消息。
可选的,所述处理器801具体用于:
根据每个网络侧设备接收第一消息的测量信息,从所述多个网络侧设备中选择至少一个网络侧设备。
可选的,所述处理器801还用于:
为所述多个网络侧设备分配不同的上行资源和临时C-RNTI,以使所述网络侧设备在收到终端发送的包含所述随机接入信息中的前导码的第一消息后,通过所述上行资源和临时C-RNTI在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述处理器801还用于:
将所述特定随机接入信息发送给多个网络侧设备之后,接收多个网络侧设备上报的由同一个终端发送的包含竞争信息的第三消息以及所述多个网络侧设备接收所述第三消息的测量信息发送给所述控制设备;根据每个网络侧设备接收第三消息的测量信息,从多个网络侧设备选择至少一个网络侧设备,并将第二发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含竞争解决信息的第四消息。
其中,上述处理器801的发送和接收都是通过收发机802进行的。
在图8中,总线架构(用总线800来代表),总线800可以包括任意数量的互联的总线和桥,总线800将包括由处理器801代表的一个或多个处理器和存储器804代表的存储器的各种电路链接在一起。总线800还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口803在总线800和收发机802之间提供接口。收发机802可以是一个元件,也可以是多个元件,比如多个接收器和发送器,提供用于在传输介质上与各种其他装置通信的单元。经处理器801处理的数据通过天线805在无线介质上进行传输,进一步,天线805还接收数据并将数据传送给处理器801。
处理器801负责管理总线800和通常的处理,还可以提供各种功能,包括定时,外围接口,电压调节、电源管理以及其他控制功能。而存储器804可以被用于存储处理器801在执行操作时所使用的数据。
可选的,处理器801可以是CPU、ASIC、FPGA或CPLD。
如图9所示,本发明实施例第二种终端包括:
处理器901,用于读取存储器904中的程序,执行下列过程:
通过收发机902接收多个网络侧设备发送的相同的特定随机接入信息; 根据所述特定随机接入信息进行随机接入。
收发机902,用于在处理器901的控制下接收和发送数据。
可选的,所述处理器901具体用于:
通过所述特定随机接入信息中的时频资源,向多个网络侧设备中的部分或全部网络侧设备发送包含所述特定随机接入信息中的前导码的第一消息;接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息。
可选的,所述处理器901还用于:
将所述特定随机接入信息中与所述终端绑定的前导码置于所述第一消息中。
可选的,所述处理器901还用于:
将终端标识置于所述第一消息中。
可选的,所述处理器901还用于:
接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息之后,向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息;接收至少一个网络侧设备发送的包含竞争解决信息的第四消息。
可选的,所述终端收到多个第二消息;
所述处理器901具体用于:
若所述多个第二消息中的UL TA不同,则选择至少一个UL TA,并根据选择的UL TA发送包含竞争信息的第三消息;或
若所述多个第二消息中的UL grant和临时C-RNTI不同,则选择至少一组UL grant和临时C-RNTI,并根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息。
可选的,所述处理器901具体用于:
在需要发送多个第三消息时,根据选择的UL grant,在同一个子帧的不同上行资源上发送采用不同临时C-RNTI加扰的所述第三消息。
其中,上述处理器901的发送和接收都是通过收发机902进行的。
在图9中,总线架构(用总线900来代表),总线900可以包括任意数量的互联的总线和桥,总线900将包括由通用处理器901代表的一个或多个处理器和存储器904代表的存储器的各种电路链接在一起。总线900还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口903在总线900和收发机902之间提供接口。收发机902可以是一个元件,也可以是多个元件,比如多个接收器和发送器,提供用于在传输介质上与各种其他装置通信的单元。例如:收发机902从其他设备接收外部数据。收发机902用于将处理器901处理后的数据发送给其他设备。取决于计算系统的性质, 还可以提供用户接口905,例如小键盘、显示器、扬声器、麦克风、操纵杆。
处理器901负责管理总线900和通常的处理,如前述所述运行通用操作系统。而存储器904可以被用于存储处理器901在执行操作时所使用的数据。
可选的,处理器901可以是CPU、ASIC、FPGA或CPLD。
基于同一发明构思,本发明实施例中还提供了一种进行随机接入的方法,由于该方法解决问题的原理与本发明实施例进行随机接入的系统相似,因此该方法的实施可以参见系统中网络侧设备的实施,重复之处不再赘述。
如图10所示,本发明实施例第一种进行随机接入的方法包括:
步骤1000、网络侧设备确定与一个或多个其他网络侧设备相同的特定随机接入信息;
步骤1001、所述网络侧设备将所述特定随机接入信息发送给终端,以使所述终端通过所述随机接入信息进行接入。
可选的,所述网络侧设备确定与一个或多个其他网络侧设备相同的随机接入信息,包括:
所述网络侧设备接收来自控制设备的所述特定随机接入信息。
可选的,所述网络侧设备将所述特定随机接入信息发送给终端,包括:
所述网络侧设备通过广播或专用信令将所述特定随机接入信息发送给终端。
可选的,所述网络侧设备将所述特定随机接入信息发送给终端之后,还包括:
所述网络侧设备接收所述终端发送的包含所述随机接入信息中的前导码的第一消息;
所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述网络侧设备接收所述终端发送的包含所述随机接入信息中的前导码的第一消息之后,在随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
所述网络侧设备将所述第一消息上报给所述控制设备,并确定收到所述控制设备的第一发送指示。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
所述网络侧设备与收到所述第一发送指示的其他网络侧设备在相同时刻使用物理下行控制信道PDCCH调度所述第二消息,并通过RA-RNTI寻址;
所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
所述网络侧设备与收到所述第一发送指示的其他网络侧设备发送包含相同随机接入响应信息的第二消息。
可选的,所述控制设备将所述第一发送指示通知给多个所述网络侧设备;
所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
所述网络侧设备与收到所述第一发送指示的其他网络侧设备在同一时刻通过相同的时频资源发送包含相同的随机接入响应信息的第二消息。
可选的,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
所述网络侧设备根据所述控制设备配置的上行资源和临时小区无线网络临时标识符C-RNTI,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
所述网络侧设备根据接收第一消息的测量信息确定满足发送条件。
可选的,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息之后,还包括:
所述网络侧设备将收到的所述终端的包含竞争信息的第三消息以及接收所述第三消息的测量信息发送给所述控制设备;
所述网络侧设备在收到所述控制设备的第二发送指示后,向所述终端发送包含竞争解决信息的第四消息。
基于同一发明构思,本发明实施例中还提供了一种进行随机接入的方法,由于该方法解决问题的原理与本发明实施例进行随机接入的系统相似,因此该方法的实施可以参见系统中控制设备的实施,重复之处不再赘述。
如图11所示,本发明实施例第二种进行随机接入的方法包括:
步骤1100、控制设备确定特定随机接入信息;
步骤1101、所述控制设备将所述特定随机接入信息发送给多个网络侧设备,以使所述多个网络侧设备将所述特定随机接入信息发送给终端,由所述终端通过所述随机接入信息进行接入。
可选的,所述控制设备将所述特定随机接入信息发送给多个网络侧设备之后,还包括:
所述控制设备接收多个网络侧设备上报的由同一个终端发送的包含所述随机接入信息中的前导码的第一消息;
所述控制设备从所述多个网络侧设备中选择至少一个网络侧设备,并将第一发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含随机接入响应信息的第二消息。
可选的,所述控制设备从所述多个网络侧设备中选择至少一个网络侧设备,包括:
所述控制设备根据每个网络侧设备接收第一消息的测量信息,从所述多个网络侧设备中选择至少一个网络侧设备。
可选的,所述方法还包括:
所述控制设备为所述多个网络侧设备分配不同的上行资源和临时C-RNTI,以使所述网络侧设备在收到终端发送的包含所述随机接入信息中的前导码的第一消息后,通过所述上行资源和临时C-RNTI在随机接入响应窗中发送包含随机接入响应信息的第二消息。
可选的,所述控制设备将所述特定随机接入信息发送给多个网络侧设备之后,还包括:
所述控制设备接收多个网络侧设备上报的由同一个终端发送的包含竞争信息的第三消息以及所述多个网络侧设备接收所述第三消息的测量信息发送给所述控制设备;
所述控制设备根据每个网络侧设备接收第三消息的测量信息,从多个网络侧设备选择至少一个网络侧设备,并将第二发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含竞争解决信息的第四消息。
基于同一发明构思,本发明实施例中还提供了一种进行随机接入的方法,由于该方法解决问题的原理与本发明实施例进行随机接入的系统相似,因此该方法的实施可以参见系统中终端的实施,重复之处不再赘述。
如图12所示,本发明实施例第三种进行随机接入的方法包括:
步骤1200、终端接收多个网络侧设备发送的相同的特定随机接入信息;
步骤1201、所述终端根据所述特定随机接入信息进行随机接入。
可选的,所述终端根据所述特定随机接入信息进行随机接入,包括:
所述终端通过所述特定随机接入信息中的时频资源,向多个网络侧设备中的部分或全部网络侧设备发送包含所述特定随机接入信息中的前导码的第一消息;
所述终端接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息。
可选的,所述终端将所述特定随机接入信息中与所述终端绑定的前导码置于所述第一消息中。
可选的,所述终端将终端标识置于所述第一消息中。
可选的,所述终端接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息之后,还包括:
所述终端向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息;
所述终端接收至少一个网络侧设备发送的包含竞争解决信息的第四消息。
可选的,所述终端收到多个第二消息;所述终端向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息,包括:
若所述多个第二消息中的上行链路定时提前UL TA不同,则所述终端选择至少一个UL TA,并根据选择的UL TA发送包含竞争信息的第三消息;或
若所述多个第二消息中的上行链路授权UL grant和临时C-RNTI不同,则所述终端选择至少一组UL grant和临时C-RNTI,并根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息。
可选的,所述终端根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息,包括:
所述终端在需要发送多个第三消息时,根据选择的UL grant,在同一个子帧的不同上行资源上发送采用不同临时C-RNTI加扰的所述第三消息。
下面以5G网络密集部署场景下,多个TRP发送相同的特定随机接入信息,UE和多个TRP进行随机接入的场景对本发明非竞争随机接入和竞争随机接入进行说明,具体可以参见图13和图14。
如图13所示,本发明实施例非竞争随机接入的方法包括:
步骤1301:CU给多个TRP配置相同的特定随机接入信息。
其中,特定随机接入信息中包括Preamble码以及Root sequence、Preamble发送功率、PRACH时频资源、随机接入响应窗、冲突解决定时器等。
步骤1302:多个TRP发送相同的特定随机接入信息。
特定随机接入信息可以在系统信息里广播给UE,也可以是on-demand方式发送,即通过专有信令发送。特定随机接入信息可用于竞争随机接入或非竞争随机接入过程。例如,系统信息里广播的是用于竞争随机接入的特定随机接入信息,而专有信令发送的是用于非竞争随机接入的特定随机接入信息。此外,多个TRP需要同步发送。
步骤1303:UE获取多个TRP发送的相同的特定随机接入信息,并发送Msg1。
即UE随机选择特定随机接入信息中指示的某个Preamble码、某个PRACH时频资源后,在这个PRACH时频资源上发送Preamble码。由于多个TRP是同步发送的,因此UE接收时是多个同步信号的叠加,有利于UE准确的接收特定随机接入信息。
对于非竞争随机接入,Msg1对应的特定随机接入信息与UE标识进行绑定或映射(mapping),因此不需要进行竞争解决。
为了减少接入延时,Msg1中可以包含UE标识信息,用于简化随机接入过程,例如将4步随机接入变成2步随机接入。
步骤1304:与UE邻近的多个TRP收到UE发送的Msg1后,在随机接入响应窗内发送Msg2。
Msg2中包含回退(backoff)参数,与Msg1对应的Preamble码,上行传输定时提前量(UL TA),上行资源(UL grant),临时C-RNTI(用于安全)等参数。
TRP使用PDCCH调度Msg2,并通过RA-RNTI进行寻址,RA-RNTI=1+t_id+10*f_id,即RA-RNTI由承载Msg1的PRACH时频资源位置所确定。
TRP在随机接入响应窗内发送Msg2的方式有两种,一种是TRP和CU之间是理想前传/回传的方式,另一种是TRP和CU之间是非理想前传/回传的方式,下面详细进行介绍。
一、TRP和CU之间是理想前传/回传。
1、多个TRP将Msg1发送给CU,同时上报接收Msg1的测量信息,包括接收信号强度、信号质量等。
2、CU通过多个Msg1中相同的Preamble码、PRACH时频资源等判断是这多个TRP收到了同一个UE的Msg1,从而进行协调处理,选择一个最好的TRP回复Msg2,或者多个接收信号满足条件的TRP回复相同的Msg2。
具体的,根据上报接收Msg1的测量信息选择接收信号强度最大的TRP或者信号质量最好的TRP,或者选择接收信号强度、信号质量满足预设门限的多个TRP。选择多个接收信号满足条件的TRP回复相同的Msg2,是为了进行可靠性传输。预设门限可以是CU配置的,也可以是TRP自配置。
3、一个或多个TRP收到CU发送Msg2的指示,在随机接入响应窗内发送Msg2。
由于通过CU进行协调处理,当多个TRP发送Msg2时,可以是多点发送分集传输,相当于SFN(Single Frequency Network,单频网)传输。具体的,多个TRP在同一时刻使用PDCCH调度Msg2,并通过RA-RNTI进行寻址,多个TRP在相同的PDCCH资源(例如CCE)上调度Msg2,调度的Msg2的内容是相同的,即Msg2中包含的参数是相同的。或者多个TRP中的一个TRP使用PDCCH调度Msg2,多个TRP在同一时刻相同的时频资源上发送相同内容的Msg2。
二、TRP和CU之间是非理想前传/回传。
TRP和CU之间是非理想前传/回传,为了减少接入时延,因此多个TRP发送Msg2不经过CU协调。如果非理想前传/回传为时延理想,吞吐量不理想的情况,可进行CU协调的Msg2发送,类比理想前传/回传的操作。以下为非理想前传/回传时延不理想情况下的操作。
1、CU预先为发送相同特定随机接入信息的多个TRP分配不同的上行资源,临时C-RNTI,保证不冲突
2、多个TRP收到UE发送的Msg1后,各自产生内容不同的Msg2,并在随机接入响应窗内发送Msg2。
其中,Msg2中包含的上行资源、临时C-RNTI不同,回退参数、UL TA可以相同或不同,与Msg1对应的Preamble码相同,用于寻址的RA-RNTI相同。进一步的,多个TRP根据接收Msg1的测量信息判断是否满足条件,例如接收信号强度、信号质量是否满足预设门限,满足条件的TRP回复Msg2。
由于没有CU协调,多个TRP可能在同一时刻使用PDCCH调度Msg2,如果是不同的PDCCH资源调度Msg2,那么UE可以正确接收多个不同的Msg2,如果是相同的PDCCH资源调度Msg2,那么UE可能正确接收多个不同的Msg2,也可能解析不出来。这是由于多个TRP同一时刻同一PDCCH资源上调度Msg2,同时多个TRP的发送信号强度相当,互相干扰,这种解析不出来的情况概率极小,现有LTE系统中也存在这个问题。
在实施中,如果Msg1中包含UE标识信息,CU要通过UE标识信息,获取UE的context(上下文),这个过程需要CU和核心网CN进行交互(例如初始接入时的鉴权、认证等过程,或者切换时识别UE),因此多个TRP将Msg1发送给CU,由CU进行协调的Msg2发送,这种方式与理想前传/回传的操作类似,在此不再赘述。由于CU通过Msg1已经识别出UE,因此UE不需要进行竞争解决。
步骤1305:UE在随机响应窗内成功收到一个或多个Msg2,则非竞争随机接入完成。
如果UE接收失败,则根据backoff时延参数,确定发起下一次随机接入的时刻,并选择随机接入资源发起下一次随机接入。
如图14所示,本发明实施例竞争随机接入的方法包括:
其中,步骤1401~步骤1404与步骤1301~步骤1304相同,在此不再赘述。
区别在于步骤1403中,对于竞争随机接入,多个UE可以选择相同的Preamble码、不同的PRACH时频资源;或者可以选择不同的Preamble码、相同的PRACH时频资源。
步骤1405:UE在随机响应窗内成功收到一个或多个Msg2。
如果UE接收失败,则根据backoff时延参数,确定发起下一次随机接入的时刻,并选择随机接入资源发起下一次随机接入。
多个UE进行竞争解决的情况和现有LTE系统类似。例如,UE1和UE2发起竞争随机接入,Msg1和Msg2的信息如下表所示。
Figure PCTCN2017086213-appb-000001
步骤1406:UE向一个或多个TRP发送Msg3。
Msg3中包含UE标识信息(例如,InitialUE-Identity或者ReestabUE-Identity)或者UE的C-RNTI。
如果UE在随机响应窗内收到一个Msg2,那么根据Msg2中包含的信息发送Msg3。
如果UE在随机响应窗内收到多个TRP发送的多个Msg2,那么UE可以选择一个或多个发送Msg3。
具体的,如果多个Msg2中包含的UL TA不同,那么UE选择一个UL TA发送一个或多个Msg3。如果多个Msg2中包含的UL grant、临时C-RNTI不同,那么UE选择一组或多组UL grant、临时C-RNTI发送一个或多个Msg3。
进一步的,UE在同一子帧收到多个TRP发送的多个Msg2,如果UL grant、临时C-RNTI不同,那么UE在同一子帧不同上行资源上发送由不同临时C-RNTI加扰的Msg3。
步骤1407:一个或多个TRP将Msg3和接收Msg3的测量信息发送给CU。
由于Msg3中包含UE标识信息或者UE的C-RNTI,需要CU进行处理,因此一个或多个TRP将Msg3发送给CU,同时上报接收Msg3的测量信息,包括接收信号强度、信号质量等。
步骤1408:CU通过UE标识信息或者UE的C-RNTI识别出UE,进行竞争解决判决,并进行协调的Msg4发送。
其中,发送Msg4与发送Msg2类似,即选择最好的TRP发送Msg4或满足条件的多个TRP发送相同的Msg4。
具体的,如果一个或多个TRP发送的Msg3中指示的UE是相同的,那么CU进行竞争解决判决,并进行协调的Msg4发送,Msg4中包含此UE的 竞争解决信息;
如果一个或多个TRP发送的Msg3中指示的UE是不同的,那么CU进行竞争解决判决,并进行协调的Msg4发送,不同的Msg4中包含不同UE的竞争解决信息。
步骤1409:TRP根据CU的指示向终端发送包含竞争解决信息的Msg4。
步骤1410:UE收到包含竞争解决信息的Msg4后,认为竞争解决成功。
如果UE在竞争解决定时器超时都没有收到Msg4,认为竞争解决失败,则根据backoff时延参数,确定发起下一次随机接入的时刻,并选择随机接入资源发起下一次随机接入。
下面列举几个例子对本发明的方案进行详细说明。
实施例一:如图15所示,本发明实施例多TRP小区理想前传/回传下随机接入示意图。
以UE1切换中的非竞争随机接入过程为例,具体过程如下:
步骤1:UE1在CU管理下的多个TRP小区之间进行切换。
例如,UE1从源小区(TRP2小区Cell2)切换到目标小区(TRP3小区Cell3和/或TRP4小区Cell4)。CU在切换时会主动要求UE1发起非竞争随机接入过程。
步骤2:CU指示TRP2通过专有信令发送非竞争特定随机接入信息。
例如,通过RRC连接重配置消息发送Msg0,Msg0包含UE1发起非竞争随机接入使用的Preamble码和PRACH信道资源,该特定随机接入信息与UE1的标识(例如,UE1的C-RNTI)进行绑定或映射。
步骤3:UE1获取TRP2发送的非竞争特定随机接入信息,并发送Msg1。
由于Msg1对应的特定随机接入信息与UE1的标识进行绑定或映射,因此不需要进行竞争解决。
步骤4:与UE1邻近的TRP3和TRP4收到UE1发送的Msg1。
由于TRP和CU之间是理想前传/回传,TRP3和TRP4将Msg1发送给CU,同时上报接收Msg1的测量信息,包括接收信号强度(例如接收功率RP,received power)、信号质量(例如SINR)。
CU通过2个Msg1中相同的Preamble码、PRACH时频资源判断是TRP3和TRP4收到了同一个UE的Msg1,并通过Msg1对应的特定随机接入信息与UE1的标识进行绑定或映射的关系,识别出是UE1。
CU进行协调处理,根据上报接收Msg1的测量信息选择接收信号强度最大的TRP或者信号质量最好的TRP回复Msg2,例如TRP4的接收功率大于TRP3的接收功率,CU选择TRP4发送Msg2。
TRP4收到CU发送Msg2的指示,在随机接入响应窗内发送Msg2。Msg2中包含回退(backoff)参数,与Msg1对应的Preamble码,上行传输定时提 前量(UL TA),上行资源(UL grant),临时C-RNTI等参数。TRP4使用PDCCH调度Msg2,并通过RA-RNTI进行寻址。
步骤5:UE1在随机响应窗内成功收到一个Msg2,完成非竞争随机接入过程。
实施例二:如图16所示,本发明实施例多TRP小区非理想前传/回传下随机接入示意图。
以UE2连接重建中的竞争随机接入过程为例,具体过程如下:
步骤1:CU给其管理下的TRP1小区~TRP4小区配置相同的特定随机接入信息,包括Preamble码以及Root sequence、Preamble发送功率、PRACH时频资源、随机接入响应窗、冲突解决定时器等。
步骤2:TRP1~TRP4在系统信息里同步发送相同的特定随机接入信息,用于竞争随机接入。
步骤3:UE2发生无线链路失败(RLF),发起连接重建过程。
UE2获取多个TRP(例如TRP2、TRP3和TRP4)发送的相同的特定随机接入信息,并发送Msg1。
即UE2随机选择特定随机接入信息中指示的某个Preamble码(例如Preamble1)、某个PRACH时频资源(例如PRACH1)后,在PRACH1上发送Preamble1。
由于3个TRP是同步发送的,因此UE2接收时是多个同步信号的叠加,有利于UE2准确的接收特定随机接入信息。
步骤4:与UE2邻近的TRP2、TRP3和TRP4收到UE2发送的Msg1。
由于TRP和CU之间是非理想前传/回传(时延不理想),为了减少接入时延,因此3个TRP不经过CU协调来发送Msg2。
CU预先为发送相同特定随机接入信息的TRP1小区~TRP4小区分配不同的上行资源和临时C-RNTI,保证不冲突。
3个TRP根据接收Msg1的测量信息判断是否满足条件,例如接收信号强度、信号质量是否满足预设门限,满足条件的TRP回复Msg2。其中,TRP3和TRP4的接收功率大于预设门限(CU配置的),而TRP2的接收功率小于预设门限,因此,TRP3和TRP4各自产生内容不同的Msg2,并在随机接入响应窗内发送Msg2,Msg2中包含的上行资源、临时C-RNTI不同,回退参数不同,UL TA相同(UE2与TRP3和TRP4距离比较近),与Msg1对应的Preamble码相同,用于寻址的RA-RNTI相同。
由于没有CU协调,TRP3和TRP4在同一时刻使用不同的PDCCH资源调度Msg2。
步骤5:UE2在随机响应窗内成功收到2个Msg2。
步骤6:由于UE2在同一子帧收到2个TRP发送的2个Msg2,其中UL  grant和临时C-RNTI不同,则UE2在同一子帧不同上行资源上发送由不同临时C-RNTI加扰的Msg3,Msg3中包含UE2的标识信息(例如ReestabUE-Identity1)。
步骤7:由于Msg3中包含UE2的标识信息,需要CU进行处理,因此TRP3和TRP4将2个Msg3发送给CU,同时上报接收Msg3的测量信息,包括接收信号强度、信号质量等。
CU通过UE2的标识信息识别出UE2,并判断2个TRP发送的Msg3中指示的UE是相同的,从而进行竞争解决判决,并选择RP最大的TRP4发送Msg4。
TRP4收到CU发送Msg4的指示,在冲突解决定时器超时前发送Msg4,Msg4中包含UE2的竞争解决信息。
步骤8:UE2在冲突解决定时器超时前收到Msg4,其中包含UE2的竞争解决信息,则UE2认为竞争解决成功,完成竞争随机接入过程。
实施例三:如图17所示,本发明实施例虚拟小区理想前传/回传下随机接入示意图。
以UE3上/下行数据到达中的简化随机接入过程为例,具体工作流程如下:
步骤1:CU管理下的虚拟小区包含TRP1~TRP4,CU为4个TRP配置相同的特定随机接入信息,包括Preamble码以及Root sequence、Preamble发送功率、PRACH时频资源、随机接入响应窗、冲突解决定时器等。
步骤2:TRP1~TRP4在系统信息里同步发送相同的特定随机接入信息,用于竞争随机接入。
步骤3:UE3为连接模式(connected mode)下的非激活态(inactive state)UE。当UE3有上/下行数据到达时,发起简化随机接入过程,即Msg1中包含UE标识,可以将4步随机接入过程简化为2步(只需要Msg1和Msg2)。
UE3获取多个TRP(例如TRP2、TRP3和TRP4)发送的相同的特定随机接入信息,并发送Msg1,即UE3随机选择特定随机接入信息中指示的某个Preamble码(例如Preamble2)、某个PRACH时频资源(例如PRACH2)后,在PRACH2上发送Preamble2。
由于3个TRP是同步发送的,因此UE3接收时是多个同步信号的叠加,有利于UE3准确的接收特定随机接入信息。为了减少接入延时,简化随机接入过程中,UE3的Msg1中包含UE3的标识信息(例如UE3的C-RNTI)。
步骤4:与UE3邻近的TRP2、TRP3和TRP4收到UE3发送的Msg1。
由于TRP和CU之间是理想前传/回传,TRP2、TRP3和TRP4将Msg1发送给CU,同时上报接收Msg1的测量信息,包括接收信号强度(例如接收功率RP,received power)、信号质量(例如SINR)。
CU通过UE3的标识信息识别出UE3,并判断3个TRP发送的Msg1中 指示的UE是相同的。
CU进行协调处理,根据上报接收Msg1的测量信息选择接收信号强度或者信号质量满足预设门限的多个TRP回复相同的Msg2,例如TRP3和TRP4的SINR大于预设门限(CU配置的),而TRP2的SINR小于预设门限,因此,CU选择TRP3和TRP4发送相同的Msg2,进行可靠性传输。
TRP3和TRP4收到CU发送Msg2的指示,在随机接入响应窗内发送相同的Msg2,是多点发送分集传输。具体的,TRP3和TRP4在同一时刻使用PDCCH调度Msg2,并通过C-RNTI进行寻址,2个TRP在相同的PDCCH资源(例如CCE)上调度Msg2,调度的Msg2的内容是相同的,即Msg2中包含的参数是相同的。或者TRP4使用PDCCH调度Msg2,TRP3和TRP4在同一时刻相同的时频资源上发送相同内容的Msg2。Msg2中包含回退(backoff)参数,与Msg1对应的Preamble码,上行传输定时提前量(UL TA),上行资源(UL grant)等参数。
步骤5:UE3在随机响应窗内成功收到一个Msg2。
由于TRP3和TRP4用C-RNTI加扰的PDCCH调度Msg2,UE3在接收调度命令时就完成了简化的随机接入过程。
实施例四:如图18所示,本发明实施例虚拟小区非理想前传/回传下随机接入示意图。
以UE4、UE5初始接入中的竞争随机接入过程为例,具体工作流程如下:
步骤1:CU管理下的虚拟小区包含TRP1~TRP4,CU为4个TRP配置相同的特定随机接入信息,包括Preamble码以及Root sequence、Preamble发送功率、PRACH时频资源、随机接入响应窗、冲突解决定时器等。
步骤2:TRP1~TRP4在系统信息里同步发送相同的特定随机接入信息,用于竞争随机接入。
步骤3:UE4、UE5初始接入,发起竞争随机接入过程。UE4、UE5获取多个TRP(例如TRP2、TRP3和TRP4)发送的相同的特定随机接入信息,并发送Msg1。
即UE4、UE5随机选择特定随机接入信息中指示的某个Preamble码(例如UE4、UE5都选择Preamble3)、某个PRACH时频资源(例如UE4选择PRACH3,UE5选择PRACH4)后,UE4在PRACH3上发送Preamble3,UE5在PRACH4上发送Preamble3。
由于3个TRP是同步发送的,因此UE4、UE5接收时是多个同步信号的叠加,有利于UE4、UE5准确的接收特定随机接入信息。
步骤4:与UE4邻近的TRP2和TRP3收到UE4发送的Msg1,与UE5邻近的TRP3和TRP4收到UE5发送的Msg1。
由于TRP和CU之间是非理想前传/回传(时延不理想),为了减少接入 时延,因此3个TRP不经过CU协调来发送Msg2。
CU预先为虚拟小区中发送相同特定随机接入信息的TRP1~TRP4分配不同的上行资源,临时C-RNTI,保证不冲突。
3个TRP根据接收Msg1的测量信息判断是否满足条件,例如接收信号强度、信号质量是否满足预设门限,满足条件的TRP回复Msg2。其中,TRP2和TRP3的RP大于预设门限(CU配置的),因此,TRP2和TRP3各自产生内容不同的Msg2,并在随机接入响应窗内发送Msg2,Msg2中包含的上行资源、临时C-RNTI不同,回退参数不同,UL TA相同(UE4与TRP2和TRP3距离比较近),与Msg1对应的Preamble码相同(例如Preamble3),用于寻址的RA-RNTI相同(例如RA-RNTI1,RA-RNTI1由PRACH3所确定)。
同理,TRP3和TRP4的RP大于预设门限(CU配置的),因此,TRP3和TRP4各自产生内容不同的Msg2,并在随机接入响应窗内发送Msg2,Msg2中包含的上行资源、临时C-RNTI不同,回退参数不同,UL TA相同(UE5与TRP3和TRP4距离比较近),与Msg1对应的Preamble码相同(例如Preamble3),用于寻址的RA-RNTI相同(例如RA-RNTI2,RA-RNTI2由PRACH4所确定)。
由于没有CU协调,TRP2和TRP3在不同时刻使用不同的PDCCH资源调度Msg2,TRP3和TRP4在同一时刻使用不同的PDCCH资源调度Msg2。
步骤5:UE4在随机响应窗内成功收到2个Msg2,UE5在随机响应窗内成功收到2个Msg2。
步骤6:由于UE4在不同子帧收到2个TRP发送的2个Msg2。
其中UL grant和临时C-RNTI不同,UE4选择先收到的1个Msg2(例如TRP2发送的Msg2),并在上行资源上发送1个Msg3,Msg3中包含UE4的标识信息(例如InitialUE-Identity1)。
由于UE5在同一子帧收到2个TRP发送的2个Msg2,其中UL grant、临时C-RNTI不同,那么UE5在同一子帧不同上行资源上发送由不同临时C-RNTI加扰的Msg3,Msg3中包含UE5的标识信息(例如InitialUE-Identity2)。
步骤7:由于Msg3中包含UE4的标识信息,需要CU进行处理,因此TRP2将Msg3发送给CU。
CU通过UE4的标识信息识别出UE4,进行竞争解决判决,并选择TRP2发送Msg4。
同理,由于Msg3中包含UE5的标识信息,需要CU进行处理,因此TRP3和TRP4将2个Msg3发送给CU,同时上报接收Msg3的测量信息,包括接收信号强度、信号质量等。
CU通过UE5的标识信息识别出UE5,并判断2个TRP发送的Msg3中指示的UE是相同的,从而进行竞争解决判决,并选择SINR最大的TRP4发 送Msg4。
TRP2收到CU发送Msg4的指示,在冲突解决定时器超时前发送Msg4,Msg4中包含UE4的竞争解决信息。同理,TRP4收到CU发送Msg4的指示,在冲突解决定时器超时前发送Msg4,Msg4中包含UE5的竞争解决信息。
步骤8:UE4和UE5在冲突解决定时器超时前收到Msg4,其中包含UE4、UE5的竞争解决信息,UE4和UE5认为竞争解决成功,完成竞争随机接入过程。
以上参照示出根据本申请实施例的方法、装置(系统)和/或计算机程序产品的框图和/或流程图描述本申请。应理解,可以通过计算机程序指令来实现框图和/或流程图示图的一个块以及框图和/或流程图示图的块的组合。可以将这些计算机程序指令提供给通用计算机、专用计算机的处理器和/或其它可编程数据处理装置,以产生机器,使得经由计算机处理器和/或其它可编程数据处理装置执行的指令创建用于实现框图和/或流程图块中所指定的功能/动作的方法。
相应地,还可以用硬件和/或软件(包括固件、驻留软件、微码等)来实施本申请。更进一步地,本申请可以采取计算机可使用或计算机可读存储介质上的计算机程序产品的形式,其具有在介质中实现的计算机可使用或计算机可读程序代码,以由指令执行系统来使用或结合指令执行系统而使用。在本申请上下文中,计算机可使用或计算机可读介质可以是任意介质,其可以包含、存储、通信、传输、或传送程序,以由指令执行系统、装置或设备使用,或结合指令执行系统、装置或设备使用。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (49)

  1. 一种进行随机接入的方法,其特征在于,该方法包括:
    网络侧设备确定与至少一个其他网络侧设备相同的特定随机接入信息;
    所述网络侧设备将所述特定随机接入信息发送给终端,以使所述终端通过所述随机接入信息进行接入。
  2. 如权利要求1所述的方法,其特征在于,所述网络侧设备确定与至少一个其他网络侧设备相同的随机接入信息,包括:
    所述网络侧设备接收来自控制设备的所述特定随机接入信息。
  3. 如权利要求1所述的方法,其特征在于,所述网络侧设备将所述特定随机接入信息发送给终端,包括:
    所述网络侧设备通过广播或专用信令将所述特定随机接入信息发送给终端。
  4. 如权利要求2所述的方法,其特征在于,所述网络侧设备将所述特定随机接入信息发送给终端之后,还包括:
    所述网络侧设备接收所述终端发送的包含所述随机接入信息中的前导Preamble码的第一消息;
    所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息。
  5. 如权利要求4所述的方法,其特征在于,所述网络侧设备接收所述终端发送的包含所述随机接入信息中的前导码的第一消息之后,在随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
    所述网络侧设备将所述第一消息上报给所述控制设备,并确定收到所述控制设备的第一发送指示。
  6. 如权利要求5所述的方法,其特征在于,所述控制设备将所述第一发送指示通知给至少一个所述网络侧设备;
    所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
    所述网络侧设备与收到所述第一发送指示的其他网络侧设备在相同时刻使用物理下行控制信道PDCCH调度所述第二消息,并通过随机接入-无线网络临时标识RA-RNTI寻址;
    所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
    所述网络侧设备与收到所述第一发送指示的其他网络侧设备发送包含相同随机接入响应信息的第二消息。
  7. 如权利要求5所述的方法,其特征在于,所述控制设备将所述第一发 送指示通知给至少一个所述网络侧设备;
    所述网络侧设备随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
    所述网络侧设备与收到所述第一发送指示的其他网络侧设备在同一时刻通过相同的时频资源发送包含相同的随机接入响应信息的第二消息。
  8. 如权利要求4所述的方法,其特征在于,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息,包括:
    所述网络侧设备根据所述控制设备配置的上行资源和临时小区无线网络临时标识C-RNTI,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
  9. 如权利要求8所述的方法,其特征在于,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息之前,还包括:
    所述网络侧设备根据接收第一消息的测量信息确定满足发送条件。
  10. 如权利要求4~9任一所述的方法,其特征在于,所述网络侧设备在随机接入响应窗中发送包含随机接入响应信息的第二消息之后,还包括:
    所述网络侧设备将收到的所述终端的包含竞争信息的第三消息以及接收所述第三消息的测量信息发送给所述控制设备;
    所述网络侧设备在收到所述控制设备的第二发送指示后,向所述终端发送包含竞争解决信息的第四消息。
  11. 一种进行随机接入的方法,其特征在于,该方法包括:
    控制设备确定特定随机接入信息;
    所述控制设备将所述特定随机接入信息发送给至少两个网络侧设备,以使所述至少两个网络侧设备将所述特定随机接入信息发送给终端,由所述终端通过所述随机接入信息进行接入。
  12. 如权利要求11所述的方法,其特征在于,所述控制设备将所述特定随机接入信息发送给至少两个网络侧设备之后,还包括:
    所述控制设备接收至少两个网络侧设备上报的由同一个终端发送的包含所述随机接入信息中的前导码的第一消息;
    所述控制设备从所述至少两个网络侧设备中选择至少一个网络侧设备,并将第一发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含随机接入响应信息的第二消息。
  13. 如权利要求12所述的方法,其特征在于,所述控制设备从所述至少两个网络侧设备中选择至少一个网络侧设备,包括:
    所述控制设备根据每个网络侧设备接收第一消息的测量信息,从所述至少两个网络侧设备中选择至少一个网络侧设备。
  14. 如权利要求11所述的方法,其特征在于,所述方法还包括:
    所述控制设备为所述至少两个网络侧设备分配不同的上行资源和临时C-RNTI,以使所述网络侧设备在收到终端发送的包含所述随机接入信息中的前导码的第一消息后,通过所述上行资源和临时C-RNTI在随机接入响应窗中发送包含随机接入响应信息的第二消息。
  15. 如权利要求11~14任一所述的方法,其特征在于,所述控制设备将所述特定随机接入信息发送给至少两个网络侧设备之后,还包括:
    所述控制设备接收至少两个网络侧设备上报的由同一个终端发送的包含竞争信息的第三消息以及所述至少两个网络侧设备接收所述第三消息的测量信息发送给所述控制设备;
    所述控制设备根据每个网络侧设备接收第三消息的测量信息,从至少两个网络侧设备选择至少一个网络侧设备,并将第二发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含竞争解决信息的第四消息。
  16. 如权利要求11~14任一所述的方法,其特征在于,所述特定随机接入信息包括但不限于下列信息中的部分或全部:
    前导码、根序列Root sequence、前导码发送功率、PRACH时频资源、随机接入响应窗、冲突解决定时器。
  17. 一种进行随机接入的方法,其特征在于,该方法包括:
    终端接收至少两个网络侧设备发送的相同的特定随机接入信息;
    所述终端根据所述特定随机接入信息进行随机接入。
  18. 如权利要求17所述的方法,其特征在于,所述终端根据所述特定随机接入信息进行随机接入,包括:
    所述终端通过所述特定随机接入信息中的时频资源,向至少两个网络侧设备中的部分或全部网络侧设备发送包含所述特定随机接入信息中的前导码的第一消息;
    所述终端接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息。
  19. 如权利要求18所述的方法,其特征在于,所述终端将所述特定随机接入信息中与所述终端绑定的前导码置于所述第一消息中。
  20. 如权利要求19所述的方法,其特征在于,所述终端将终端标识置于所述第一消息中。
  21. 如权利要求19所述的方法,其特征在于,所述终端接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息之后,还包括:
    所述终端向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息;
    所述终端接收至少一个网络侧设备发送的包含竞争解决信息的第四消 息。
  22. 如权利要求21所述的方法,其特征在于,所述终端收到多个第二消息;所述终端向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息,包括:
    若所述多个第二消息中的上行链路定时提前UL TA不同,则所述终端选择至少一个UL TA,并根据选择的UL TA发送包含竞争信息的第三消息;或若所述多个第二消息中的上行链路授权UL grant和临时C-RNTI不同,则所述终端选择至少一组UL grant和临时C-RNTI,并根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息。
  23. 如权利要求22所述的方法,其特征在于,所述终端根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息,包括:
    所述终端在需要发送多个第三消息时,根据选择的UL grant,在同一个子帧的不同上行资源上发送采用不同临时C-RNTI加扰的所述第三消息。
  24. 一种进行随机接入的网络侧设备,其特征在于,该网络侧设备包括:
    第一信息确定模块,用于确定与至少一个其他网络侧设备相同的特定随机接入信息;
    第一处理模块,用于将所述特定随机接入信息发送给终端,以使所述终端通过所述随机接入信息进行接入。
  25. 如权利要求24所述的网络侧设备,其特征在于,所述第一信息确定模块具体用于:
    接收来自控制设备的所述特定随机接入信息。
  26. 如权利要求24所述的网络侧设备,其特征在于,所述第一处理模块具体用于:
    通过广播或专用信令将所述特定随机接入信息发送给终端。
  27. 如权利要求25所述的网络侧设备,其特征在于,所述第一处理模块还用于:
    将所述特定随机接入信息发送给终端之后,接收所述终端发送的包含所述随机接入信息中的前导Preamble码的第一消息;在随机接入响应窗中发送包含随机接入响应信息的第二消息。
  28. 如权利要求27所述的网络侧设备,其特征在于,所述第一处理模块具体用于:
    将所述第一消息上报给所述控制设备,并在确定收到所述控制设备的第一发送指示后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
  29. 如权利要求28所述的网络侧设备,其特征在于,所述控制设备将所述第一发送指示通知给至少一个所述网络侧设备;
    所述第一处理模块具体用于:
    与收到所述第一发送指示的其他网络侧设备在相同时刻使用物理下行控制信道PDCCH调度所述第二消息,并通过RA-RNTI寻址;与收到所述第一发送指示的其他网络侧设备发送包含相同随机接入响应信息的第二消息。
  30. 如权利要求28所述的网络侧设备,其特征在于,所述控制设备将所述第一发送指示通知给至少一个所述网络侧设备;
    所述第一处理模块具体用于:
    与收到所述第一发送指示的其他网络侧设备在同一时刻通过相同的时频资源发送包含相同的随机接入响应信息的第二消息。
  31. 如权利要求27所述的网络侧设备,其特征在于,所述第一处理模块具体用于:
    根据所述控制设备配置的上行资源和临时CRNTI,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
  32. 如权利要求31所述的网络侧设备,其特征在于,所述第一处理模块还用于:
    在根据接收第一消息的测量信息确定满足发送条件后,在随机接入响应窗中发送包含随机接入响应信息的第二消息。
  33. 如权利要求27~32任一所述的网络侧设备,其特征在于,所述第一处理模块还用于:
    在随机接入响应窗中发送包含随机接入响应信息的第二消息之后,将收到的所述终端的包含竞争信息的第三消息以及接收所述第三消息的测量信息发送给所述控制设备;在收到所述控制设备的第二发送指示后,向所述终端发送包含竞争解决信息的第四消息。
  34. 一种进行随机接入的控制设备,其特征在于,该控制设备包括:
    第二信息确定模块,用于确定特定随机接入信息;
    第二处理模块,用于将所述特定随机接入信息发送给至少两个网络侧设备,以使所述至少两个网络侧设备将所述特定随机接入信息发送给终端,由所述终端通过所述随机接入信息进行接入。
  35. 如权利要求34所述的控制设备,其特征在于,所述第二处理模块还用于:
    将所述特定随机接入信息发送给至少两个网络侧设备之后,接收至少两个网络侧设备上报的由同一个终端发送的包含所述随机接入信息中的前导码的第一消息;从所述至少两个网络侧设备中选择至少一个网络侧设备,并将第一发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含随机接入响应信息的第二消息。
  36. 如权利要求35所述的控制设备,其特征在于,所述第二处理模块具体用于:
    根据每个网络侧设备接收第一消息的测量信息,从所述至少两个网络侧设备中选择至少一个网络侧设备。
  37. 如权利要求34所述的控制设备,其特征在于,所述第二处理模块还用于:
    为所述至少两个网络侧设备分配不同的上行资源和临时C-RNTI,以使所述网络侧设备在收到终端发送的包含所述随机接入信息中的前导码的第一消息后,通过所述上行资源和临时C-RNTI在随机接入响应窗中发送包含随机接入响应信息的第二消息。
  38. 如权利要求34~37任一所述的控制设备,其特征在于,所述第二处理模块还用于:
    将所述特定随机接入信息发送给至少两个网络侧设备之后,接收至少两个网络侧设备上报的由同一个终端发送的包含竞争信息的第三消息以及所述至少两个网络侧设备接收所述第三消息的测量信息发送给所述控制设备;根据每个网络侧设备接收第三消息的测量信息,从至少两个网络侧设备选择至少一个网络侧设备,并将第二发送指示通知选择的所述网络侧设备,以使所述网络侧设备向所述终端发送包含竞争解决信息的第四消息。
  39. 如权利要求34~37任一所述的控制设备,其特征在于,所述特定随机接入信息包括但不限于下列信息中的部分或全部:
    前导码、根序列Root sequence、前导码发送功率、PRACH时频资源、随机接入响应窗、冲突解决定时器。
  40. 一种进行随机接入的终端,其特征在于,该终端包括:
    接收模块,用于接收至少两个网络侧设备发送的相同的特定随机接入信息;
    接入模块,用于根据所述特定随机接入信息进行随机接入。
  41. 如权利要求40所述的终端,其特征在于,所述接入模块具体用于:
    通过所述特定随机接入信息中的时频资源,向至少两个网络侧设备中的部分或全部网络侧设备发送包含所述特定随机接入信息中的前导码的第一消息;接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二消息。
  42. 如权利要求41所述的终端,其特征在于,所述接入模块还用于:
    将所述特定随机接入信息中与所述终端绑定的前导码置于所述第一消息中。
  43. 如权利要求42所述的终端,其特征在于,所述接入模块还用于:
    将终端标识置于所述第一消息中。
  44. 如权利要求42所述的终端,其特征在于,所述接入模块还用于:
    接收至少一个所述网络侧设备发送的包含相同随机接入响应信息的第二 消息之后,向发送所述第二消息的至少一个网络侧设备发送包含竞争信息的第三消息;接收至少一个网络侧设备发送的包含竞争解决信息的第四消息。
  45. 如权利要求44所述的终端,其特征在于,所述接收模块收到多个第二消息;
    所述接入模块具体用于:
    若所述多个第二消息中的上行链路定时提前UL TA不同,则所述终端选择至少一个UL TA,并根据选择的UL TA发送包含竞争信息的第三消息;或若所述多个第二消息中的上行链路授权UL grant和临时C-RNTI不同,则所述终端选择至少一组UL grant和临时C-RNTI,并根据选择的UL grant和临时C-RNTI发送包含竞争信息的第三消息。
  46. 如权利要求45所述的终端,其特征在于,所述接入模块具体用于:
    在需要发送多个第三消息时,根据选择的UL grant,在同一个子帧的不同上行资源上发送采用不同临时C-RNTI加扰的所述第三消息。
  47. 一种进行随机接入的网络侧设备,其特征在于,该网络侧设备包括存储器、处理器和收发机;其中,
    所述存储器用于存储计算机可读程序;
    所述处理器通过运行所述存储器中的程序,以完成如权利要求1至10任一所述的方法;
    所述收发机用于在所述处理器的控制下接收和发送数据。
  48. 一种进行随机接入的控制设备,其特征在于,该控制设备包括存储器、处理器和收发机;其中,
    所述存储器用于存储计算机可读程序;
    所述处理器通过运行所述存储器中的程序,以完成如权利要求11至16任一所述的方法;
    所述收发机用于在所述处理器的控制下接收和发送数据。
  49. 一种进行随机接入的终端,其特征在于,该终端包括存储器、处理器和收发机;其中,
    所述存储器用于存储计算机可读程序;
    所述处理器通过运行所述存储器中的程序,以完成如权利要求17至23任一所述的方法;
    所述收发机用于在所述处理器的控制下接收和发送数据。
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CN112740806A (zh) * 2019-02-13 2021-04-30 Oppo广东移动通信有限公司 随机接入的方法、终端设备和网络设备
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