WO2017219253A1 - 一种接入方法、设备及系统 - Google Patents

一种接入方法、设备及系统 Download PDF

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Publication number
WO2017219253A1
WO2017219253A1 PCT/CN2016/086603 CN2016086603W WO2017219253A1 WO 2017219253 A1 WO2017219253 A1 WO 2017219253A1 CN 2016086603 W CN2016086603 W CN 2016086603W WO 2017219253 A1 WO2017219253 A1 WO 2017219253A1
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WO
WIPO (PCT)
Prior art keywords
base station
information
channel
link
uplink
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PCT/CN2016/086603
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English (en)
French (fr)
Inventor
张莉莉
坦尼·纳坦·爱德华
斯特林-加拉赫·理查德
李国荣
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP16905795.7A priority Critical patent/EP3474593B1/en
Priority to US16/312,293 priority patent/US20190239248A1/en
Priority to PCT/CN2016/086603 priority patent/WO2017219253A1/zh
Priority to CN201680085746.4A priority patent/CN109196906A/zh
Publication of WO2017219253A1 publication Critical patent/WO2017219253A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0066Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0069Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0072Transmission or use of information for re-establishing the radio link of resource information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • H04W36/087Reselecting an access point between radio units of access points
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/34Reselection control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0466Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/11Allocation or use of connection identifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • H04W76/27Transitions between radio resource control [RRC] states
    • 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

Definitions

  • the present invention relates to the field of communications, and in particular, to an access method, device, and system.
  • the random access (English name: Random access, English abbreviation: RA) process is performed by the user equipment (English name: User Equipment, referred to as UE) It is implemented by transmitting a pilot signal (English: Preamble) on a physical random access channel (English name: Physical Random Access Channel, PRACH).
  • RA process mainly includes: the UE accessing the network, and synchronizing the uplink transmission timing of the UE.
  • the propagation delay and the multipath effect cause the UL transmission of multiple UEs to be misaligned.
  • eNB Enhanced Node Basestation
  • base station base station
  • DFT discrete Fourier transform
  • ICI Inter-Carrier Interference
  • ISI Inter-Symbol Interference
  • the RA procedure is defined in LTE to estimate the timing difference of each UE, and the transmission time is adjusted in the initial access phase.
  • the random access response (English full name: RA Request, RAR for short) message contains an 11-bit length of time advancement (English name: Timing Advance, abbreviation: TA) command, allowing the eNB to be in a cell with a cell radius of 100 km. Can be compensated.
  • a prominent feature of the ultra-dense network (English name: Ultra Dense Network, UDN for short) is that the cell radius is small and the channel delay is shorter. Therefore, under the premise of synchronization of the downlink (English name: Down Link, DL for short), the UL timing difference is reduced. For example, a 200-meter cell radius will only produce a round-trip propagation delay of 1.3 microseconds, which is much smaller than the 4.7 microsecond cyclic prefix (English full name: Cyclic Prefix, CP for short) in LTE.
  • CP Cyclic Prefix
  • UL synchronization is not as necessary in a UDN network as in a macro LTE system. That is to say, when the UE is downlink synchronized, the UE can perform UL transmission at any time.
  • the main function of the RA process is to perform UL synchronization, and UL synchronization can be avoided in the UDN network, it is possible to simplify the RA process and improve system efficiency for the UDN network.
  • An access method, device and system provided by an embodiment of the invention can simplify the process of the RA and improve the system efficiency.
  • an embodiment of the present invention provides an access method, including: a base station sends first information to a UE in a target cell, where the first information is an uplink grant UL grant message; So that the UE transmits information on the uplink UL according to the first information.
  • the base station is a first base station of a cell to be accessed
  • the base station is a first base station serving as a target base station, or the base station is a second base station serving as a source base station; wherein the target base station is added to the link after the handover base station, double link or multilink Or at least one of the converted base stations; the source base station is at least one of a base station before handover, a link in a double link or a multilink, or a base station before conversion;
  • the first base station receives information that the UE sends on the UL according to the first information.
  • Embodiments of the present invention may be applied to scenes such as UE access, base station handover, double-link or multi-link base station addition or conversion, wherein double links are also referred to as dual connections, and multiple links are also referred to as multiple connections. Therefore, the base station that transmits the first information to the UE when the UE accesses and receives the information that the UE transmits on the UL according to the first information may be the same base station, the base station switches, and the double-link or multi-link base station adds or converts the scenario.
  • the base station that sends the first information to the UE and receives the information that the UE sends on the UL according to the first information may be the same base station, that is, the target base station, or may send the first information to the UE by using the target base station or the source base station.
  • the target base station is used to receive information that the UE sends on the UL according to the first information.
  • the base station sends an uplink UL grant message to the UE directly in the target cell, so that the UE can send information on the UL according to the UL grant message, and the uplink synchronization is not required by the TA mechanism, and the UDN network is not used in the prior art. Simplify the RA process and increase system efficiency.
  • the base station detects the second information, where the second information is a scheduling request;
  • the method before the detecting, by the base station, the second information, the method further includes:
  • the base station receives the second information that is sent by the UE on the first channel.
  • the base station configures a first channel for the UE in the target cell, and sends the Configuration information of the first channel, where the first channel includes a resource for transmitting the second information.
  • the first channel includes an uplink control channel PUCCH or a random access channel PRACH.
  • the determining, by the base station, the first channel for the UE in the target cell includes:
  • the base station configures a first channel for the UE based on a coverage of the target cell.
  • the base station configures the PRACH for the UE when the coverage of the target cell is greater than the range in which the UE can be prevented from acquiring the time advance TA.
  • the base station configures a first channel for the UE, and the first channel includes an uplink control channel PUCCH or a random access channel PRACH.
  • the resource for transmitting the second information is contention based.
  • the sending, by the system, the configuration information of the first channel includes: The broadcast information transmits configuration information of the first channel to the UE.
  • the first information is scrambled by the first wireless network transmission identifier RNTI.
  • the information that the first base station receives, on the UL, the UE, according to the first information includes:
  • the first base station receives a message message3 sent by the UE on the UL according to the first information, and the message 3 is scrambled by using the first wireless network transmission identifier RNTI.
  • the method further includes:
  • the first base station sends a message 4 to the UE, where the message 4 is used to indicate that the UE competes for a successful resolution.
  • the first wireless network transmission identifier RNTI is an uplink scheduling request-the wireless network transmission identifier SR-RNTI.
  • t id is the subframe number of the resource of the uplink scheduling request SR
  • the scheduling request employs a packet indication in which different sizes of message 3 are indicated to the base station by different packets.
  • the sending, by the base station, the first information to the UE in the target cell includes:
  • the base station sends the first information to the UE in the target cell by using any one of the following: a handover command, a handover control command, a radio resource control RRC reconfiguration command, a double link or a multi-link link addition or conversion command. .
  • an access method including:
  • the UE transmits information on the uplink UL according to the first information.
  • the base station is a first base station of a cell to be accessed
  • the base station is a first base station serving as a target base station, or the base station is a second base station serving as a source base station; wherein the target base station is a base station after handover, a double-link or a multi-link converted base station At least one of the source base stations being at least one of a base station before handover, a double link, or a base station before conversion in a multilink;
  • the method for the UE to send information on the uplink UL according to the first information includes:
  • the UE sends information to the first base station on the uplink UL according to the first information.
  • Embodiments of the present invention may be applied to scenarios such as UE access, base station handover, double link or multi-link link addition or conversion, wherein dual links are also referred to as dual connections, and multiple links are also referred to as multiple connections. Therefore, the base station that transmits the first information to the UE when the UE accesses and receives the information that the UE transmits on the UL according to the first information may be the same base station, the base station switches, the link of the double link or the multiple link is added or converted.
  • the base station that sends the first information to the UE and receives the information that the UE sends on the UL according to the first information may be the same base station, that is, the target base station, or may send the first information to the UE by using the target base station or the source base station. And using the target base station to receive information that the UE sends on the UL according to the first information.
  • the base station sends an uplink UL grant message to the UE directly in the target cell, so that the UE can send information on the UL according to the UL grant message, and the uplink synchronization is not required by the TA mechanism, and the UDN network is not used in the prior art. Simplify the RA process and increase system efficiency.
  • the receiving, by the UE, the first information that is sent by the base station in the target cell includes:
  • the method further includes:
  • the UE sends second information on the first channel, where the second information is a scheduling request.
  • the method further includes:
  • the UE receives configuration information of the first channel, where the first channel includes a resource for transmitting second information.
  • the first channel includes an uplink control channel PUCCH or a random access channel PRACH.
  • the receiving, by the UE, the configuration information of the first channel includes:
  • the UE receives system broadcast information, and acquires configuration information of the first channel in the system broadcast information.
  • the method before the receiving, by the UE, the configuration information of the first channel, the method further includes:
  • the UE acquires downlink synchronization with a target cell of the base station.
  • the UE receives the first information sent by the base station to the UE according to the second information include:
  • the UE searches for the first information sent by the base station according to the second information by using the first wireless network transmission identifier in a predefined search space.
  • the search space corresponding to each of the first wireless network transmission identifiers is different, and/or each The search space corresponding to the first wireless network transmission identifier is distributed.
  • the first information is scrambled by the first wireless network transmission identifier RNTI.
  • the sending, by the UE, the information on the uplink UL according to the first information includes:
  • the UE sends a message message3 to the first base station on the uplink UL according to the first information, and the message 3 is scrambled by using the first radio network transmission identifier RNTI.
  • the method further includes:
  • the first wireless network transmission identifier RNTI is an uplink scheduling request-the wireless network transmission identifier SR-RNTI.
  • the receiving, by the UE, the first information that is sent by the base station in the target cell includes:
  • the UE receives the first information that the base station sends in the target cell by any one of a handover command, a handover control command, an RRC reconfiguration command, a double link or a multi-link link addition or conversion command.
  • a base station including:
  • a communication unit configured to send first information to the UE in the target cell, where the first information is an uplink grant UL grant message, so that the UE sends information on the uplink UL according to the first information.
  • the base station is a first base station of a cell to be accessed
  • the base station is a first base station serving as a target base station, or the base station is a second base station serving as a source base station; wherein the target base station is added or converted for a link in a base station, a double link or a multiple link after handover At least one of the following base stations; the source base station is at least one of a base station before handover, a link in a double link or a multilink, or a base station before conversion;
  • the communication unit of the first base station is further configured to receive information that the UE sends on the UL according to the first information.
  • Embodiments of the present invention may be applied to scenes such as UE access, base station handover, double-link or multi-link base station addition or conversion, wherein double links are also referred to as dual connections, and multiple links are also referred to as multiple connections. Therefore, the base station that transmits the first information to the UE when the UE accesses and receives the information that the UE transmits on the UL according to the first information may be the same base station, the base station switches, and the double-link or multi-link base station adds or converts the scenario.
  • the base station of the information sent by the information on the UL may be the same base station, that is, the target base station, or may send the first information to the UE by using the target base station or the source base station, and the target base station receives the UE to send on the UL according to the first information. information.
  • the base station sends an uplink UL grant message to the UE directly in the target cell, so that the UE can send information on the UL according to the UL grant message, and the uplink synchronization is not required by the TA mechanism, and the UDN network is not used in the prior art. Simplify the RA process and increase system efficiency.
  • the method further includes:
  • a detecting unit configured to detect second information, where the second information is a scheduling request
  • the communication unit is further configured to send the first information to the UE according to the second information detected by the detecting unit.
  • the communication unit is further configured to receive the second information that is sent by the UE on the first channel.
  • the method further includes: a configuration unit, configured to configure a first channel for the UE in the target cell;
  • the communication unit is further configured to send, to the UE, configuration information of a first channel configured by the configuration unit, where the first channel includes a resource for transmitting second information.
  • the first channel includes an uplink control channel PUCCH or a random access channel PRACH.
  • the configuration unit is configured to use the coverage of the target cell as a UE Set the first channel.
  • the configuration unit is configured to configure a PRACH for the UE, when the coverage of the target cell is greater than a range in which the UE can be prevented from acquiring the time advance TA.
  • the configuration unit is configured to configure a first channel for the UE, where the first channel includes an uplink control channel PUCCH or a random access channel (PRACH) .
  • PUCCH uplink control channel
  • PRACH random access channel
  • the resource for transmitting the second information is contention based.
  • the communication unit is specifically configured to send configuration information of the first channel to the UE by using system broadcast information.
  • the first information is scrambled by the first wireless network transmission identifier RNTI.
  • the communication unit of the first base station is further configured to receive, by the UE, the UL according to the first information, in an eleventh possible implementation manner.
  • the message message 3 is sent, and the message 3 is scrambled using the first radio network transmission identifier RNTI.
  • the communication unit of the first base station is further configured to send a message 4 to the UE, where the message 4 is used by Instructing the UE to compete for a successful resolution.
  • the first radio network transmission identifier RNTI is an uplink scheduling request-the radio network transmission identifier SR-RNTI.
  • t id is the subframe number of the resource of the SR
  • the scheduling request employs a packet indication in which different sizes of message 3 are indicated to the eNB by different packets.
  • the communications unit is specifically configured to pass the following in the target cell: a handover command, a handover control command, and an RRC.
  • the reconfiguration command, the double link or the multi-link link addition or the conversion command sends the first information to the UE.
  • a UE including:
  • a communication unit configured to receive first information that is sent by the base station in the target cell, where the first information is an uplink grant message;
  • the communication unit is further configured to send information on the uplink UL according to the first information.
  • the base station is a first base station of a cell to be accessed
  • the base station is a first base station serving as a target base station, or the base station is a second base station serving as a source base station; wherein the target base station is added or converted for a link in a base station, a double link or a multiple link after handover At least one of the following base stations; the source base station is at least one of a base station before handover, a link in a double link or a multilink, or a base station before conversion;
  • the communication unit is specifically configured to send information on the uplink UL according to the first information. To the first base station.
  • Embodiments of the present invention may be applied to scenes such as UE access, base station handover, double-link or multi-link base station addition or conversion, wherein double links are also referred to as dual connections, and multiple links are also referred to as multiple connections. Therefore, the base station that transmits the first information to the UE when the UE accesses and receives the information that the UE transmits on the UL according to the first information may be the same base station, the base station switches, and the double-link or multi-link base station adds or converts the scenario.
  • the base station that sends the first information to the UE and receives the information that the UE sends on the UL according to the first information may be the same base station, that is, the target base station, or may send the first information to the UE by using the target base station or the source base station.
  • the target base station is used to receive information that the UE sends on the UL according to the first information.
  • the base station sends an uplink UL grant message to the UE directly in the target cell, so that the UE can send information on the UL according to the UL grant message, and the uplink synchronization is not required by the TA mechanism, and the UDN network is not used in the prior art. Simplify the RA process and increase system efficiency.
  • the communication unit is specifically configured to: receive, by the UE, the base station according to the second information to the UE The first message sent.
  • the communication unit is further configured to send the second information on the first channel, the second The information is a scheduling request.
  • the communication unit is further configured to receive configuration information of the first channel, where the first The channel contains resources for transmitting the second information.
  • the first channel includes an uplink control channel PUCCH or a random access channel PRACH.
  • the communication unit is specifically configured to receive system broadcast information, and in the system Obtaining configuration information of the first channel in the unified broadcast information.
  • the UE further includes:
  • a synchronization unit configured to obtain downlink synchronization with a target cell of the base station.
  • the communication unit is specifically configured to transmit an identifier search station by using a first wireless network in a predefined search space. Decoding the first information sent by the base station according to the second information.
  • the search space corresponding to each of the first wireless network transmission identifiers is different, and/or each The search space corresponding to the first wireless network transmission identifier is distributed.
  • the first information is scrambled by the first wireless network transmission identifier RNTI.
  • the communication unit is specifically configured to perform the foregoing on the uplink UL according to the first information.
  • the first base station transmits a message message3, which is scrambled using the first radio network transmission identifier RNTI.
  • the communication unit is further configured to:
  • the first wireless network transmission identifier RNTI is an uplink scheduling request-the wireless network transmission identifier SR-RNTI.
  • the communications unit is specifically configured to receive, by the base station, the following in the target cell: a handover command, a handover control command , RRC reconfiguration command, double link or multi-link chain
  • a handover command a handover control command
  • RRC reconfiguration command a command sent by any of the way addition or conversion commands.
  • a base station including: a processor, a memory, and a transceiver.
  • the processor executing the program code in the memory controls the transceiver to implement the functions of the various functional units in the base station of the third aspect to implement the access method of the first aspect.
  • a UE in a sixth aspect, includes: a processor, a memory, and a transceiver.
  • the processor executing the program code in the memory controls the transceiver to implement the functions of the functional units in the base station of the fifth aspect to implement the access method of the second aspect.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a communication system according to another embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a UE according to another embodiment of the present disclosure.
  • FIG. 5 is a schematic flowchart diagram of an access method according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart diagram of an access method according to another embodiment of the present invention.
  • FIG. 7 is a schematic flowchart diagram of an access method according to still another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a UE according to another embodiment of the present invention.
  • the embodiment of the present solution is applied to a UDN system.
  • the basic principle of the solution is that the information transmission on the UL in the UDN system can be based on downlink synchronization. Since the cell coverage of the UDN system is smaller, the CP length is sufficient to prevent multiple UEs. ISI and ICI due to the time difference between the downlink and the asynchronous.
  • the WINNER channel model is used as the basic channel model of the UDN network, and the maximum channel delay is 487 nanoseconds in the B4 scene.
  • LOS is the direct vision path (English name: Line-Of-Sight)
  • NLOS is the non-direct view diameter (Non-LOS). Therefore, for a typical LTE CP length of 4.7 microseconds, the UL synchronization process is not used, and the cell radius that the system can support UL detection without ICI or ISI is:
  • UL synchronization is not as necessary in a UDN network as in an LTE network. That is to say, when the UE is downlink synchronized, the UE can perform UL transmission at any time.
  • An embodiment of the present invention provides a communication system, as shown in FIG. 1, including a base station 101 and a plurality of UEs 102, wherein the base station 101 is a base station in a UDN system, and provides a target cell for random access for each of the plurality of UEs 102.
  • Embodiments of the present invention may be applied to scenarios such as UE access (as shown in FIG. 1), base station handover, double-link or multi-link base station addition or conversion, wherein dual links are also referred to as dual connections, and multiple links are also referred to as multiple connections. connection.
  • the base station 101 provides the UE with the to-be-accessed cell when it is applied to the UE access scenario; when the scenario is applied to the base station handover, the double-link or the multi-link link addition or conversion, as shown in FIG. 2, the base station includes The first base station 101-1 and the second base station 101-2.
  • the first base station 101-1 is used as a target base station to which the UE is switched, and the second base station 101-2 is used.
  • the first base station 101-1 is a target base station added or switched to a link serving as a UE
  • the second base station 101-2 is a link serving as a UE. Add the source base station to which it was originally before or before the conversion.
  • the at least one UE 102 may be a mobile phone, a tablet computer, a notebook computer, an Ultra-mobile Personal Computer (UMPC), a netbook, a Personal Digital Assistant (PDA), or the like.
  • UMPC Ultra-mobile Personal Computer
  • PDA Personal Digital Assistant
  • the present invention does not specifically limit the type of the UE. It should be noted that, in the embodiment of the present invention, the number of the UE and the base station in FIG. 1 and FIG. 2 is only schematic, and may have any number of UEs and base stations according to actual application scenarios.
  • each of the base stations shown in FIGS. 1 and 2 may include a processor 201, a memory 202, and a transceiver 203.
  • the processor 201 is a control center of the base station, and may be a processor or a collective name of a plurality of processing elements.
  • the processor 201 is a central processing unit (CPU), and may be an Application Specific Integrated Circuit (ASIC), or one or more configured to implement the embodiments of the present invention.
  • An integrated circuit such as one or more digital signal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).
  • DSPs digital signal processors
  • FPGAs Field Programmable Gate Arrays
  • the processor 201 can perform various functions of the base station by running or executing software programs and/or modules stored in the memory 202, as well as invoking data stored in the memory 202.
  • the memory 202 may be a volatile memory such as a random-access memory (RAM) or a non-volatile memory such as a read-only memory (read-only) Memory, referred to as ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD); or a combination of the above types of memory for storage Invent the related application of the access method, and the configuration file.
  • RAM random-access memory
  • ROM read-only memory
  • flash memory referred to as a read-only memory (read-only) Memory
  • HDD hard disk drive
  • SSD solid-state drive
  • the transceiver 203 may be a transmitting and receiving antenna of the base station or a communication unit having communication capability with the outside world.
  • the processor 201, the memory 202, and the transceiver 203 are connected by a bus 204.
  • the bus 204 can be an industry standard architecture (English name: industry standard architecture, English abbreviation: ISA) bus, external device interconnection (English full name: peripheral component: English abbreviation: PCI) bus or extended industry standard architecture (English full name: Extended industry standard architecture, English abbreviation: EISA) bus.
  • the bus 204 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 3, but it does not mean that there is only one bus or one type of bus.
  • the processor 201 controls the transceiver 203 to implement the following function, and the transceiver 203 sends the first information to the UE in the target cell, where the first information is an uplink grant UL grant message; when used as the first base station
  • the transceiver 203 is further configured to receive information that the UE transmits on the uplink UL according to the first information.
  • the UE shown in FIG. 1 and 2 may include a processor 301, a memory 302, and a transceiver 303.
  • the processor 301 is a control center of the UE, and may be a processor or a collective name of a plurality of processing elements.
  • the processor 301 is a central processing unit (CPU), and may be an Application Specific Integrated Circuit (ASIC), or one or more configured to implement the embodiments of the present invention.
  • An integrated circuit such as one or more digital signal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).
  • DSPs digital signal processors
  • FPGAs Field Programmable Gate Arrays
  • the processor 301 can perform various functions of the base station by running or executing software programs and/or modules stored in the memory 302, as well as invoking data stored in the memory 302.
  • the memory 302 can be a volatile memory, such as random access Memory (random-access memory, RAM for short); or non-volatile memory, such as read-only memory (ROM), flash memory, hard disk Drive (HDD) or solid-state drive (SSD); or a combination of the above types of memory for storing related applications and configuration files that can implement the access method of the present invention.
  • RAM random access Memory
  • non-volatile memory such as read-only memory (ROM), flash memory, hard disk Drive (HDD) or solid-state drive (SSD); or a combination of the above types of memory for storing related applications and configuration files that can implement the access method of the present invention.
  • the transceiver 303 may be a transceiver antenna of the UE or a communication unit having communication capability with the outside world.
  • the processor 301, the memory 302, and the transceiver 303 are connected by a bus 304.
  • the bus 304 can be an industry standard architecture (English name: industry standard architecture, English abbreviation: ISA) bus, external device interconnection (English full name: peripheral component: English abbreviation: PCI) bus or extended industry standard architecture (English full name: Extended industry standard architecture, English abbreviation: EISA) bus.
  • the bus 304 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 4, but it does not mean that there is only one bus or one type of bus.
  • the processor 301 controls the transceiver 303 to implement the following functions. After the UE obtains downlink synchronization with the target cell of the base station, the transceiver 303 receives the first information sent by the base station in the target cell, where the first information is an uplink. Authorization message; the transceiver 303 transmits information on the uplink UL according to the first information.
  • an embodiment of the present invention provides an access method, which is applied to the foregoing communication system, which is applicable to access (initial access, re-access (connection reestablishment)), base station handover, or double-link or multi-link.
  • the conversion includes the following steps:
  • the base station sends the first information to the UE in the target cell, where the first information is an uplink grant UL grant message.
  • the UE receives the first information sent by the base station in the target cell.
  • the UE sends information on the uplink UL according to the first information.
  • the method further includes: when applied to the access process, the method further includes:
  • the base station receives information that is sent by the UE on the uplink UL according to the first information.
  • the access method specifically includes the following two methods:
  • Manner 1 The base station handover procedure or base station switching of dual-link or multi-link is controlled by the first base station:
  • the first base station sends the first information to the UE in the target cell, where the first information is an uplink grant UL grant message.
  • the UE receives the first information that is sent by the first base station in the target cell.
  • the UE sends information to the first base station on the uplink UL according to the first information.
  • the first base station receives information that is sent by the UE on the uplink UL according to the first information.
  • the first base station further needs to notify the second base station of the first information.
  • Manner 2 The base station handover or the double-link or multi-link base station conversion process is controlled by the second base station:
  • the second base station sends the first information to the UE in the target cell, where the first information is an uplink grant UL grant message.
  • the UE receives the first information sent by the second base station in the target cell.
  • the UE sends information to the first base station on the uplink UL according to the first information.
  • the first base station receives information that is sent by the UE on the uplink UL according to the first information.
  • the second base station further needs to notify the first base station of the first information.
  • the first base station and the second base station may both be the secondary base station.
  • the special case is that the UE adds one to the secondary base station SeNB in the macro base station macro eNB.
  • the secondary base station SeNB can be used as the first base station, and the macro base station is used as the second base station.
  • the process of the newly added link is controlled by the macro base station, the process of the UE accessing the secondary base station refers to the procedure. 301-304 method, new link
  • the process of the UE accessing the secondary base station refers to the methods in steps 201-204, and details are not described herein.
  • the base station sends an uplink UL grant message to the UE directly in the target cell, so that the UE can send information on the UL according to the UL grant message, and the uplink synchronization is not required by the TA mechanism, and the UDN network is not used in the prior art. Simplify the RA process and increase system efficiency.
  • the UE needs to first try the RA process in the target cell of the base station.
  • the solution provided by the present invention is applied to the access. Specifically include:
  • the base station configures a first channel for the UE in the target cell, and sends configuration information of the first channel to the UE.
  • the base station sends configuration information of the first channel to the UE by using system broadcast information.
  • the UE receives configuration information of the first channel.
  • Step 402 is specifically: after receiving the downlink synchronization between the UE and the target cell of the base station, receiving the system broadcast information, and acquiring the configuration information of the first channel in the system broadcast information.
  • the base station configures a first channel for the UE in the target cell, where the first channel includes resources for transmitting the second information, and the specific first channel includes the uplink control channel PUCCH or the random access channel PRACH to transmit the second information.
  • the base station configured for the UE may be a resource for the SR (English full name: Scheduling Request, Chinese: uplink scheduling request), for example, PUCCH (English full name: Physical Uplink Control Channel, Chinese) : Physical uplink control channel) resources; of course, for a UE entering an LTE network cell, the base station is a PRACH (Physical Random Access Channel, Chinese: Physical Random Access Channel) resource configured for the UE.
  • the specific base station configures the first channel for the UE based on the coverage of the target cell, which may be based on the following principles:
  • the base station configures the PRACH for the UE, for example, the UE needs to transmit information to the UE in the LTE cell. Or a range of transmissions than the UE does not use TA
  • the eNB can still configure the RA resource of the PRACH in the system message.
  • the system message is SIB2.
  • the base station configures the first channel for the UE, and the first channel may include a PUCCH or a PRACH.
  • the eNB configures only the RA resources including the contention-based PUCCH (SR resource) in the system message for a cell small enough to remove the TA mechanism, such as an SDN network.
  • SR resource contention-based PUCCH
  • the resources of the contention-based PUCCH are reserved from the normal SR resources to avoid possible collisions.
  • the contention-based SR resources may be grouped to indicate to the eNB different sizes of the random access RA (random access) process message 3 (English name: message 3, Chinese: scheduling transmission information, abbreviated: Msg3).
  • Contention-based PUCCH can be used for contention based on contention and non-contention based RA resources.
  • the base station only configures one RA resource for the UE, that is, configures the PUCCH or configures the PRACH.
  • the maximum offset of the radio block PRB (physical resource block) of the RA resource is Illustrative if you choose the maximum offset
  • Each PRB supports up to 12 resources through code domain extension, while using 3 times the time domain extension. This choice is reasonable because the offset is determined by the maximum channel propagation delay. As mentioned in the above principle, this delay is very small.
  • the UE sends the second information on the first channel, where the second information is an uplink scheduling request.
  • the base station receives second information that is sent by the UE on the first channel, where the second information is a scheduling request.
  • the scheduling request is an SR uplink scheduling request
  • the solution is used as an example in the solution, but the method is not limited. Because the information is transmitted in both directions, the uplink is only the relative direction of the downlink. Does not contain other meanings.
  • the base station detects the second information, and sends the first information to the UE according to the second information.
  • the first information is scrambled by the radio network transmission identifier RNTI, where the RNTI may use an uplink scheduling request-the radio network transmission identifier SR-RNTI, and the SR-RNTI (English full name: Scheduling Request-Radio Network Tempory Identity, Chinese: uplink Scheduling Request - Wireless Network Temporary Identity).
  • the first information can be sent by an RRC reconfiguration command.
  • the UE searches, in a predefined search space, the first information that is sent by the base station according to the second information by using the first wireless network transmission identifier.
  • the UE searches for the UL authorization information in the preset search space corresponding to each SR-RNTI.
  • SR-RNTI t id +10 ⁇ n C firstchannel ; where t id is the subframe number of the resource of the uplink scheduling request SR, Is the resource index of the contention-based SR within each subframe.
  • the SR-RNTI is determined by the resources of the SR selected by the UE.
  • the first channel is exemplified by a PUCCH, wherein a contention based PUCCH (a resource of an SR) may be randomly selected by the UE.
  • a contention based PUCCH (a resource of an SR) may be randomly selected by the UE.
  • An example is: reuse PUCCH resource index, such as:
  • t id is the subframe number of the resource of the SR
  • the UE searches for UL grant information by using an uplink scheduling request-wireless network transmission identifier in a predefined search space, and each uplink scheduling request-the wireless network transmission identifier corresponds to a different search space, and/or each uplink scheduling request- The search space corresponding to the wireless network transmission identifier is distributed; that is, the search space of each SR-RNTI is different and dispersed.
  • the UE uses the SR-RNTI to search for UL grant information in a preset search space by associating the search space of the SR-RNTI to the RNTI value. details as follows:
  • n s is the slot number in a radio frame.
  • the RNTI value for the n RNTI is determined by the SR resource.
  • the UE sends a message message3 to the base station, where the message 3 is scrambled by using an uplink scheduling request-the wireless network transmission identifier SR-RNTI.
  • step 407 message3 is sent by the UE on the uplink UL according to the first information.
  • the uplink scheduling request in step 403 employs a packet indication
  • different sizes of the message 3 are indicated to the eNB by different packets.
  • the base station receives the message message3 sent by the UE.
  • step 207 208, if the scheduled transmission information supports a hybrid automatic repeat request (English name: Hybrid Automatic Repeat reQuest, abbreviated as: HARQ), the UE retransmits the scheduled transmission information to the base station; and the base station receives the scheduled transmission information retransmitted by the UE. .
  • HARQ Hybrid Automatic Repeat reQuest
  • the base station sends a message 4 to the UE, where the message 4 is used to indicate that the UE is successfully resolved by the competition.
  • the UE receives the message 4 sent by the base station.
  • the message 4 may include a C-RNTI (English name: Cell-Radio Network Temporary Identifier, Chinese: Cell-Radio Network Temporary Identity) that is successfully solved by the process corresponding to the UE.
  • C-RNTI International name: Cell-Radio Network Temporary Identifier, Chinese: Cell-Radio Network Temporary Identity
  • the method for the UE to access the target cell includes the following steps:
  • the base station sends the first information to the UE in the target cell, where the first information is an uplink grant UL grant message.
  • the first information is sent by at least one of a handover command, a handover control command, a double link or a multi-link link addition or a conversion command.
  • the UE receives the first information sent by the base station in the target cell, where the first information is an uplink grant message.
  • the UE sends information on the uplink UL according to the first information.
  • the UE may send an RRC (Radio Resource Control, Radio Resource Control) Connection Reconfiguration Complete radio resource control handover success signaling to the base station according to the uplink grant message to indicate that the cell handover is completed.
  • RRC Radio Resource Control, Radio Resource Control
  • Connection Reconfiguration Complete radio resource control handover success signaling to the base station according to the uplink grant message to indicate that the cell handover is completed.
  • the base station may be the first base station or the second base station in step 501.
  • the first base station receives the information that the UE sends on the UL, where when the base station in step 501 is the first base station, The first base station is required to notify the second base station of the first information, or when the base station in step 501 is the second base station, the second base station is further required to notify the first base station of the first information.
  • a possible problem under the above mechanism is that after the target base station receives the source base station handover preparation message (double link/multilink addition and/or conversion preparation message) , a UL grant message is generated, and the UL resource specified by the UL grant message is reserved in a specific time period.
  • the actual switching may occur after a period of time, or not at all.
  • Case 1 If switching (dual link/multilink addition and/or conversion) occurs after a period of time. Considering the format of the UL grant message, how long does the target base station need to wait after transmitting the UL grant message without scheduling the reserved UL resources? The target base station does not know exactly when the UE will switch (double link/multilink addition and/or conversion), so it is difficult to decide when to schedule this. Some uplink resources (designated UL resources). Considering the UE receiving handover commands (dual link/multilink addition and/or conversion) and the worst case delay in downlink synchronization with the target cell, the scheduler needs conservative estimation. However, this sets the requirements for the scheduler of the target base station, meaning that the handover procedure takes longer than actually, because even if the UE quickly enters the target cell, the scheduler must wait for resources.
  • the source cell can be restricted to limit the delay.
  • the RACH-less handover Random Access Channel
  • the incoming double link/multilink addition and/or conversion is defined as a fast triggered handover (dual link/multilink addition and/or conversion), ie, as long as the eNB determines that the handover procedure is a handover that does not require random access, requiring handover (Double Link/Multilink Addition and/or Transition) is triggered quickly, that is, when the UL resource specified by the uplink grant message is configured, the configuration is performed with a small waiting time, and the source base station is required to respond quickly or perform handover to the UE, Reduce switching time.
  • the target base station may allocate multiple resources in a period of time, similar to an SPS (Semi-Persistent Scheduling) allocation method in a short period of time.
  • SPS Semi-Persistent Scheduling
  • the semi-persistent scheduling usually allocates some resources semi-statically to the eNB, and does not need to be dynamically notified by the authorization signaling. These resources are allocated in advance through the semi-persistent scheduling instructions, and appear at certain intervals.
  • the target base station may allocate a plurality of resources in a period of time, and during the period of time, the resources are granted by the uplink grant signaling at a certain interval, similar to the semi-static scheduling, that is, the target base station reserves some uplink resources. It does not require the UE to issue a demand indication and can be obtained at a certain time. In this way, the UE does not need to rely on the dynamic authorization signaling to acquire resources and perform uplink transmission every time, so the access delay can be reduced.
  • Case 2 If switching (dual link/multilink addition and/or conversion) does not occur. That is, the UE does not use the scheduled UL resource, for example: due to uplink synchronization failure, handover failure or handover to the wrong cell.
  • the target base station may only consider the transmission lost; if the UL-authorized message supports HARQ, there may be a series of HARQ NACKs until the HARQ process ends. This means wasting resources in 2 directions (upstream and downstream).
  • A/B means A or B; A and/or B, which means A, or B, or A and B.
  • a base station for implementing the foregoing access method, including:
  • the communication unit 71 is configured to send first information to the UE in the target cell, where the first information is an uplink grant UL grant message, so that the UE sends information on the uplink UL according to the first information.
  • the base station sends an uplink UL grant message to the UE directly in the target cell, so that the UE can send information on the UL according to the UL grant message, and the uplink synchronization is not required by the TA mechanism, and the UDN network is not used in the prior art. Simplify the RA process and increase system efficiency.
  • the base station is a first base station of a cell to be accessed
  • the base station is a first base station serving as a target base station, or the base station is a second base station serving as a source base station; wherein the target base station is added or converted for a link in a base station, a double link or a multiple link after handover At least one of the following base stations; the source base station is at least one of a base station before handover, a link in a double link or a multilink, or a base station before conversion;
  • the communication unit of the first base station is further configured to receive information that the UE sends on the UL according to the first information.
  • the base station further includes:
  • the detecting unit 72 is configured to detect second information, where the second information is a scheduling request;
  • the communication unit 71 is further configured to send the first information to the UE according to the second information detected by the detecting unit 72.
  • the communication unit 71 is further configured to receive the second information that is sent by the UE on the first channel.
  • the base station further includes: a configuration unit 73, configured to configure, by the target cell, a first channel for the UE;
  • the communication unit 71 is further configured to send, to the UE, configuration information of a first channel configured by the configuration unit, where the first channel includes a resource for transmitting second information.
  • the first channel includes an uplink control channel PUCCH or a random access channel PRACH.
  • the configuration unit 73 is configured to configure the first channel for the UE based on the coverage of the target cell.
  • the configuration unit 73 is configured to configure a PRACH for the UE, when the coverage of the target cell is greater than a range in which the UE can be prevented from acquiring the time advance TA.
  • the configuration unit 73 is configured to configure a first channel for the UE, where the first channel includes an uplink control channel PUCCH or a random access channel. PRACH.
  • the resource for transmitting the second information is contention based.
  • the communication unit 71 is specifically configured to send configuration information of the first channel to the UE by using system broadcast information.
  • the first information is scrambled by the first wireless network transmission identifier RNTI.
  • the communication unit 71 of the first base station is further configured to receive a message message3 sent by the UE on the UL according to the first information, where the message 3 is transmitted by using a first wireless network. Know RNTI scrambling.
  • the communication unit 71 of the first base station is further configured to send a message 4 to the UE, where the message 4 is used to indicate that the UE competes for a successful resolution.
  • the first wireless network transmission identifier RNTI is an uplink scheduling request-the wireless network transmission identifier SR-RNTI.
  • SR-RNTI t id +10 ⁇ n C firstchannel ;
  • t id is the subframe number of the resource of the SR
  • the scheduling request adopts a packet indication, wherein different sizes of the message 3 are indicated to the eNB by different packets.
  • the communication unit 71 is specifically configured to: in the target cell, by using any one of the following: a handover command, a handover control command, an RRC reconfiguration command, a double link, or a link increase or transition command in a multilink
  • the UE sends the first information.
  • a UE including:
  • the communication unit 81 is configured to receive first information that is sent by the base station in the target cell, where the first information is an uplink grant message.
  • the communication unit 81 is further configured to send information on the uplink UL according to the first information.
  • the base station is a first base station of a cell to be accessed
  • the base station is a first base station serving as a target base station, or the base station is a second base station serving as a source base station; wherein the target base station is added or converted for a link in a base station, a double link or a multiple link after handover At least one of the following base stations; the source base station is at least one of a base station before handover, a link in a double link or a multilink, or a base station before conversion;
  • the communication unit 81 is specifically configured to send on the uplink UL according to the first information. Information to the first base station.
  • the communication unit 81 is specifically configured to receive, by the UE, first information that is sent by the base station to the UE according to the second information.
  • the communication unit 81 is further configured to send the second information on the first channel, where the second information is a scheduling request.
  • the communication unit 81 is further configured to receive configuration information of the first channel, where the first channel includes a resource for transmitting the second information.
  • the first channel includes an uplink control channel PUCCH or a random access channel PRACH.
  • the communication unit 81 is specifically configured to receive system broadcast information, and obtain configuration information of the first channel in the system broadcast information.
  • the UE further includes:
  • the synchronization unit 82 is configured to obtain downlink synchronization with the target cell of the base station.
  • the communication unit 81 is specifically configured to search, by using the first wireless network transmission identifier in the predefined search space, the first information that is sent by the base station according to the second information.
  • each of the first wireless network transmission identifiers has a different search space, and/or a search space corresponding to each of the first wireless network transmission identifiers is distributed.
  • the first information is scrambled by the first wireless network transmission identifier RNTI.
  • the communication unit 81 is specifically configured to send a message message3 to the first base station according to the first information, where the message 3 is scrambled by using a first radio network transmission identifier RNTI.
  • the communication unit 81 is further configured to:
  • the first wireless network transmission identifier RNTI is an uplink scheduling request-the wireless network transmission identifier SR-RNTI.
  • the communication unit 81 is specifically configured to receive, by the base station, any one of the following: a handover command, a handover control command, an RRC reconfiguration command, a double link or a multilink, a link addition or a conversion command in the target cell.
  • a computer readable medium comprising computer readable instructions that, when executed, perform the operations of performing the methods of the above-described embodiments.
  • a computer program product including the computer readable medium described above.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separated
  • the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English full name: read-only memory, English abbreviation: ROM), a random access memory (English full name: random access memory, English abbreviation: RAM), magnetic A variety of media that can store program code, such as a disc or a disc.

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Abstract

本发明的实施例提供了一种接入方法、设备及系统,能够简化RA的过程,提高系统效率。该方法包括:基站在目标小区向UE发送第一信息,所述第一信息为上行链路授权UL grant消息;以便所述UE依据所述第一信息在上行链路UL上发送信息。本发明的实施例用于接入。

Description

一种接入方法、设备及系统 技术领域
本发明涉及通信领域,尤其涉及一种接入方法、设备及系统。
背景技术
目前,在长期演进技术(英文全称:Long Term Evolution,简称:LTE)系统中,随机接入(英文全称:Random access,英文简称:RA)过程由用户设备(英文全称:User Equipment,简称:UE)在物理随机接入信道(英文全称:Physical Random Access Channel,简称:PRACH)发送导频信号(英文:Preamble)来实现。上述的RA过程主要包括:UE接入网络、以及同步UE的上行发送定时。
在当前的LTE系统的上行链路(英文全称:Up Link,简称UL)传输中,传播时延和多径效果导致多个UE的UL传输不对齐,这在演进型基站(英文全称:Enhanced Node Basestation,简称:eNB)(简称:基站)侧进行离散傅里叶变换(英文全称:Discrete Fourier Transform,简称:DFT)检测后,引起严重的载波间干扰(英文全称:Inter-Carrier Interference,简称:ICI)和符号间干扰(英文全称:Inter-Symbol Interference,简称:ISI)。因此LTE中定义RA过程来估计每个UE的定时差,并在初始接入阶段调节发送时间。比如,随机接入响应(英文全称:RA Request,简称:RAR)消息包含11-bit长度的时间提前量(英文全称:Timing Advance,简称:TA)命令,允许eNB在100公里小区半径的小区中可以进行补偿。
然而,超密网(英文全称:Ultra Dense Network,简称:UDN)网络的一个显著特点是小区半径很小且信道时延更短。因此,在下行链路(英文全称:Down Link,简称:DL)同步的前提下,UL定时差被减少。比如200米小区半径只会产生1.3微秒的往返传播时延,这比LTE中4.7微秒的循环前缀(英文全称:Cyclic Prefix,简称:CP)长度小得多。在不采用UL同步时,若CP足够处理UL定时差的问题,则UL同步在UDN场景中是不必要的。
从避免干扰角度,UL同步在UDN网络中不像在宏LTE系统中那么必要。也就是说,当UE下行同步时,UE可以在任何时刻进行UL传输。
由于RA过程的主要功能是执行UL同步,而UL同步在UDN网络中可以被避免,因此有可能对UDN网络简化RA过程,提高系统效率。
发明内容
本发明的实施例提供的一种接入方法、设备及系统,能够简化RA的过程,提高系统效率。
为解决上述的技术问题,第一方面,本发明的实施例提供一种接入方法,包括:基站在目标小区向UE发送第一信息,所述第一信息为上行链路授权UL grant消息;以便所述UE依据所述第一信息在上行链路UL上发送信息。
示例性的,在第一种可能的实现方式中,所述基站为待接入小区的第一基站;
或者,所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中链路增加或转换前的基站中的至少一项;
具体的,对于UE依据所述第一信息在上行链路UL上发送信息,第一基站接收UE依据所述第一信息在UL上发送的信息。
本发明的实施例可以应用于UE接入、基站切换,双链接或多链接的基站增加或转换等场景,其中双链接也称作双连接,多链接也称作多连接。因此,在UE接入时向UE发送第一信息和接收UE依据所述第一信息在UL上发送的信息的基站可以为同一个基站,基站切换,双链接或多链接的基站增加或转换场景中,向UE发送第一信息和接收UE依据所述第一信息在UL上发送的信息的基站可以为同一个基站即目标基站,也可以为采用目标基站或源基站向UE发送第一信息,采用目标基站接收UE依据所述第一信息在UL上发送的信息。
在上述方案中,基站直接在目标小区向UE发送上行链路UL授权消息,使得UE能够依据UL授权消息在UL上发送信息,相对于现有技术无需再通过TA机制进行上行同步,对UDN网络简化RA过程,提高系统效率。
结合第一方面或第一方面的第一种可能的实现方式,在第二种可能的实现方式中,所述基站检测第二信息,所述第二信息为调度请求;
依据所述第二信息向所述UE发送所述第一信息。
结合第一方面或第一方面中任意一种可能的实现方式,在第三种可能的实现方式中,所述基站检测第二信息前,还包括:
所述基站接收UE在第一信道发送的所述第二信息。
结合第一方面或第一方面中任意一种可能的实现方式,在第四种可能的实现方式中,所述基站在所述目标小区为UE配置第一信道,并向所述UE发送所述第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
结合第一方面或第一方面中任意一种可能的实现方式,在第五种可能的实现方式中,所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
结合第一方面或第一方面中任意一种可能的实现方式,在第六种可能的实现方式中,所述基站在目标小区为UE配置第一信道,包括:
所述基站基于所述目标小区的覆盖范围为UE配置第一信道。
结合第一方面或第一方面中任意一种可能的实现方式,在第七种可能的实现方式中,
当所述目标小区的覆盖范围大于UE能够免于获取时间提前量TA进行传输的范围时,所述基站为UE配置PRACH;
或者,
当所述目标小区的覆盖范围小于UE能够免于获取TA进行传输的范围时,所述基站为UE配置第一信道,所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
结合第一方面或第一方面中任意一种可能的实现方式,在第八种可能的实现方式中,用于传输第二信息的资源是基于竞争的。
结合第一方面或第一方面中任意一种可能的实现方式,在第九种可能的实现方式中,所述向所述UE发送所述第一信道的配置信息,包括:所述基站通过系统广播信息向所述UE发送第一信道的配置信息。
结合第一方面或第一方面中任意一种可能的实现方式,在第十种可能的实现方式中,所述第一信息被第一无线网络传输标识RNTI加扰。
结合第一方面或第一方面中任意一种可能的实现方式,在第十一种可能的实现方式中,所述第一基站接收UE依据所述第一信息在UL上发送的信息包括:
所述第一基站接收UE依据所述第一信息在UL上发送的消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
结合第一方面或第一方面中任意一种可能的实现方式,在第十二种可能的实现方式中,所述方法还包括:
所述第一基站向UE发送消息4,所述消息4用于指示所述UE竞争解决成功。
结合第一方面或第一方面中任意一种可能的实现方式,在第十三种可能的实现方式中,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
结合第一方面或第一方面中任意一种可能的实现方式,在第十四种可能的实现方式中,
SR-RNTI=tid+10×nC firstchannel
其中,tid是上行调度请求SR的资源的子帧号,
Figure PCTCN2016086603-appb-000001
是每个子帧内 部基于竞争的SR的资源索引。
结合第一方面或第一方面中任意一种可能的实现方式,在第十五种可能的实现方式中,
所述调度请求采用分组指示,其中通过不同的分组向基站指明消息3的不同尺寸。
结合第一方面或第一方面中任意一种可能的实现方式,在第十六种可能的实现方式中,所述基站在目标小区向UE发送第一信息,包括:
所述基站在目标小区通过下述:切换命令、切换控制命令、无线资源控制RRC重配置命令、双链接或多链接的链路增加或转换命令中的任一项向所述UE发送第一信息。
第二方面,提供一种接入方法,其特征在于,包括:
UE接收基站在目标小区发送的第一信息,所述第一信息为上行链路授权消息;
所述UE依据所述第一信息在上行链路UL上发送信息。
结合第二方面,在第一种可能的实现方式中,
所述基站为待接入小区的第一基站;
或者,
所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中转换前的基站中的至少一项;
所述UE依据所述第一信息在上行链路UL上发送信息方法包括:
所述UE依据所述第一信息在上行链路UL上发送信息至所述第一基站。
本发明的实施例可以应用于UE接入、基站切换,双链接或多链接的链路增加或转换等场景,其中双链接也称作双连接,多链接也称作多连接。因此,在UE接入时向UE发送第一信息和接收UE依据所述第一信息在UL上发送的信息的基站可以为同一个基站,基站切换,双链接或多链接的链路增加或转换场景中,向UE发送第一信息和接收UE依据所述第一信息在UL上发送的信息的基站可以为同一个基站即目标基站,也可以为采用目标基站或源基站向UE发送第一信息,采用目标基站接收UE依据所述第一信息在UL上发送的信息。
在上述方案中,基站直接在目标小区向UE发送上行链路UL授权消息,使得UE能够依据UL授权消息在UL上发送信息,相对于现有技术无需再通过TA机制进行上行同步,对UDN网络简化RA过程,提高系统效率。
结合第二方面或第二方面中任意一种可能的实现方式,在第二种可能的实现方式中,所述UE接收基站在目标小区发送的第一信息,包括:
所述UE接收所述基站依据第二信息向所述UE发送的第一信息。
结合第二方面或第二方面中任意一种可能的实现方式,在第三种可能的实现方式中,所述方法还包括:
所述UE在第一信道上发送第二信息,所述第二信息为调度请求。
结合第二方面或第二方面中任意一种可能的实现方式,在第四种可能的实现方式中所述方法还包括:
所述UE接收所述第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
结合第二方面或第二方面中任意一种可能的实现方式,在第五种可能的实现方式中,
所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
结合第二方面或第二方面中任意一种可能的实现方式,在第六种可能 的实现方式中,所述UE接收所述第一信道的配置信息,包括:
所述UE接收系统广播信息,并在所述系统广播信息中获取所述第一信道的配置信息。
结合第二方面或第二方面中任意一种可能的实现方式,在第七种可能的实现方式中,所述UE接收所述第一信道的配置信息前,所述方法还包括:
所述UE与所述基站的目标小区取得下行同步。
结合第二方面或第二方面中任意一种可能的实现方式,在第八种可能的实现方式中,所述UE接收所述基站依据所述第二信息向所述UE发送的第一信息,包括:
所述UE在预定义的搜索空间中通过第一无线网络传输标识搜索所述基站依据第二信息发送的所述第一信息。
结合第二方面或第二方面中任意一种可能的实现方式,在第九种可能的实现方式中,每个所述第一无线网络传输标识对应的搜索空间不同,和/或,每个所述第一无线网络传输标识对应的搜索空间是分布式的。
结合第二方面或第二方面中任意一种可能的实现方式,在第十种可能的实现方式中,所述第一信息被第一无线网络传输标识RNTI加扰。
结合第二方面或第二方面中任意一种可能的实现方式,在第十一种可能的实现方式中,所述UE依据所述第一信息在上行链路UL上发送信息包括:
所述UE依据所述第一信息在上行链路UL上向所述第一基站发送消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
结合第二方面或第二方面中任意一种可能的实现方式,在第十二种可能的实现方式中,所述方法还包括:
接收所述第一基站发送的消息4,所述消息4用于指示所述UE竞争解决成功。
结合第二方面或第二方面中任意一种可能的实现方式,在第十三种可能的实现方式中,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
结合第二方面或第二方面中任意一种可能的实现方式,在第十四种可能的实现方式中,所述UE接收基站在目标小区发送的第一信息,包括:
所述UE接收基站在目标小区通过下述:切换命令、切换控制命令、RRC重配置命令、双链接或多链接的链路增加或转换命令中的任一项发送的所述第一信息。
第三方面,提供一种基站,包括:
通信单元,用于在目标小区向UE发送第一信息,所述第一信息为上行链路授权UL grant消息;以便所述UE依据所述第一信息在上行链路UL上发送信息。
结合第三方面,在第一种可能的实现方式中,
所述基站为待接入小区的第一基站;
或者,
所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中链路增加或转换前的基站中的至少一项;
第一基站的所述通信单元还用于接收UE依据所述第一信息在UL上发送的信息。
本发明的实施例可以应用于UE接入、基站切换,双链接或多链接的基站增加或转换等场景,其中双链接也称作双连接,多链接也称作多连接。因此,在UE接入时向UE发送第一信息和接收UE依据所述第一信息在UL上发送的信息的基站可以为同一个基站,基站切换,双链接或多链接的基站增加或转换场景中,向UE发送第一信息和接收UE依据所述第一 信息在UL上发送的信息的基站可以为同一个基站即目标基站,也可以为采用目标基站或源基站向UE发送第一信息,采用目标基站接收UE依据所述第一信息在UL上发送的信息。
在上述方案中,基站直接在目标小区向UE发送上行链路UL授权消息,使得UE能够依据UL授权消息在UL上发送信息,相对于现有技术无需再通过TA机制进行上行同步,对UDN网络简化RA过程,提高系统效率。
结合第三方面或第三方面中任意一种可能的实现方式,在第二种可能的实现方式中,还包括:
检测单元,用于检测第二信息,所述第二信息为调度请求;
所述通信单元还用于依据所述检测单元检测的第二信息向所述UE发送所述第一信息。
结合第三方面或第三方面中任意一种可能的实现方式,在第三种可能的实现方式中,
所述通信单元还用于接收UE在第一信道发送的所述第二信息。
结合第三方面或第三方面中任意一种可能的实现方式,在第四种可能的实现方式中,
还包括:配置单元,用于在所述目标小区为UE配置第一信道;
所述通信单元还用于向所述UE发送所述配置单元配置的第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
结合第三方面或第三方面中任意一种可能的实现方式,在第五种可能的实现方式中,
所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
结合第三方面或第三方面中任意一种可能的实现方式,在第六种可能的实现方式中,所述配置单元用于基于所述目标小区的覆盖范围为UE配 置第一信道。
结合第三方面或第三方面中任意一种可能的实现方式,在第七种可能的实现方式中,
当所述目标小区的覆盖范围大于UE能够免于获取时间提前量TA进行传输的范围时,所述配置单元用于为UE配置PRACH;
或者,
当所述目标小区的覆盖范围小于UE能够免于获取TA进行传输的范围时,所述配置单元用于为UE配置第一信道,所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
结合第三方面或第三方面中任意一种可能的实现方式,在第八种可能的实现方式中,用于传输第二信息的资源是基于竞争的。
结合第三方面或第三方面中任意一种可能的实现方式,在第九种可能的实现方式中,所述通信单元具体用于通过系统广播信息向所述UE发送第一信道的配置信息。
结合第三方面或第三方面中任意一种可能的实现方式,在第十种可能的实现方式中,所述第一信息被第一无线网络传输标识RNTI加扰。
结合第三方面或第三方面中任意一种可能的实现方式,在第十一种可能的实现方式中,所述第一基站的通信单元还用于接收UE依据所述第一信息在UL上发送的消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
结合第三方面或第三方面中任意一种可能的实现方式,在第十二种可能的实现方式中,所述第一基站的通信单元还用于向UE发送消息4,所述消息4用于指示所述UE竞争解决成功。
结合第三方面或第三方面中任意一种可能的实现方式,在第十三种可能的实现方式中,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
结合第三方面或第三方面中任意一种可能的实现方式,在第十四种可能的实现方式中,
SR-RNTI=tid+10×nC firstchannel
其中,tid是SR的资源的子帧号,
Figure PCTCN2016086603-appb-000002
是每个子帧内部基于竞争的SR的资源索引。
结合第三方面或第三方面中任意一种可能的实现方式,在第十五种可能的实现方式中,
所述调度请求采用分组指示,其中通过不同的分组向eNB指明消息3的不同尺寸。
结合第三方面或第三方面中任意一种可能的实现方式,在第十六种可能的实现方式中,所述通信单元具体用于在目标小区通过下述:切换命令、切换控制命令、RRC重配置命令、双链接或多链接的链路增加或转换命令中的任一项向所述UE发送第一信息。
第四方面,提供一种UE,包括:
通信单元,用于接收基站在目标小区发送的第一信息,所述第一信息为上行链路授权消息;
所述通信单元,还用于依据所述第一信息在上行链路UL上发送信息。
结合第四方面,在第一种可能的实现方式中,
所述基站为待接入小区的第一基站;
或者,
所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中链路增加或转换前的基站中的至少一项;
所述通信单元具体用于依据所述第一信息在上行链路UL上发送信息 至所述第一基站。
本发明的实施例可以应用于UE接入、基站切换,双链接或多链接的基站增加或转换等场景,其中双链接也称作双连接,多链接也称作多连接。因此,在UE接入时向UE发送第一信息和接收UE依据所述第一信息在UL上发送的信息的基站可以为同一个基站,基站切换,双链接或多链接的基站增加或转换场景中,向UE发送第一信息和接收UE依据所述第一信息在UL上发送的信息的基站可以为同一个基站即目标基站,也可以为采用目标基站或源基站向UE发送第一信息,采用目标基站接收UE依据所述第一信息在UL上发送的信息。
在上述方案中,基站直接在目标小区向UE发送上行链路UL授权消息,使得UE能够依据UL授权消息在UL上发送信息,相对于现有技术无需再通过TA机制进行上行同步,对UDN网络简化RA过程,提高系统效率。
结合第四方面或第四方面中任意一种可能的实现方式,在第三种可能的实现方式中,所述通信单元,具体用于所述UE接收所述基站依据第二信息向所述UE发送的第一信息。
结合第四方面或第四方面中任意一种可能的实现方式,在第四种可能的实现方式中,所述通信单元,还体用于在第一信道上发送第二信息,所述第二信息为调度请求。
结合第四方面或第四方面中任意一种可能的实现方式,在第五种可能的实现方式中,所述通信单元,还体用于接收所述第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
结合第四方面或第四方面中任意一种可能的实现方式,在第六种可能的实现方式中,
所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
结合第四方面或第四方面中任意一种可能的实现方式,在第七种可能的实现方式中,所述通信单元,具体用于接收系统广播信息,并在所述系 统广播信息中获取所述第一信道的配置信息。
结合第四方面或第四方面中任意一种可能的实现方式,在第八种可能的实现方式中,所述UE还包括:
同步单元,用于与所述基站的目标小区取得下行同步。
结合第四方面或第四方面中任意一种可能的实现方式,在第九种可能的实现方式中,所述通信单元具体用于在预定义的搜索空间中通过第一无线网络传输标识搜索所述基站依据第二信息发送的所述第一信息。
结合第四方面或第四方面中任意一种可能的实现方式,在第十种可能的实现方式中,每个所述第一无线网络传输标识对应的搜索空间不同,和/或,每个所述第一无线网络传输标识对应的搜索空间是分布式的。
结合第四方面或第四方面中任意一种可能的实现方式,在第十一种可能的实现方式中,所述第一信息被第一无线网络传输标识RNTI加扰。
结合第四方面或第四方面中任意一种可能的实现方式,在第十二种可能的实现方式中,所述通信单元具体用于依据所述第一信息在上行链路UL上向所述第一基站发送消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
结合第四方面或第四方面中任意一种可能的实现方式,在第十三种可能的实现方式中,所述通信单元还用于:
接收所述第一基站发送的消息4,所述消息4用于指示所述UE竞争解决成功。
结合第四方面或第四方面中任意一种可能的实现方式,在第十四种可能的实现方式中,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
结合第四方面或第四方面中任意一种可能的实现方式,在第十五种可能的实现方式中,所述通信单元具体用于接收基站在目标小区通过下述:切换命令、切换控制命令、RRC重配置命令、双链接或多链接的链 路增加或转换命令中的任一项发送的所述第一信息。
第五方面,提供一种基站可以包括:处理器、存储器、收发器。在具体实现中,处理器执行存储器中的程序代码控制收发器实现第三方面基站中各个功能单元的功能,以实现第一方面的接入方法。
第六方面,提供一种UE可以包括:处理器、存储器、收发器。在具体实现中,处理器执行存储器中的程序代码控制收发器实现第五方面基站中各个功能单元的功能,以实现第二方面的接入方法。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,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,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明的实施例提供的一种通信系统的结构示意图;
图2为本发明的另一实施例提供的一种通信系统的结构示意图;
图3为本发明的实施例提供的一种基站的结构示意图;
图4为本发明的另一实施例提供的一种UE的结构示意图;
图5为本发明的实施例提供的一种接入方法的流程示意图;
图6为本发明的另一实施例提供的一种接入方法的流程示意图;
图7为本发明的又一实施例提供的一种接入方法的流程示意图;
图8为本发明的实施例提供的一种基站的结构示意图;
图9为本发明的另一实施例提供的一种UE的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实 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他实施例,都属于本发明保护的范围。
本方案的实施例应用于UDN系统,本方案的基本原理为在UDN系统中UL上的信息传输可以基于下行同步,由于UDN系统小区覆盖范围将LTE系统较小,CP长度足够防止多个UE之间因下行不同步存在的时间差而造成的ISI和ICI。示例性的参照表1所示,以竞争(WINNER)信道模型作为UDN网络的基本信道模型,最大信道时延在B4场景中是487纳秒。
表1
Figure PCTCN2016086603-appb-000003
其中,LOS为直视径(英文全称:Line-Of-Sight),NLOS为非直视径(Non-LOS)。因此对4.7微秒的典型LTE CP长度,不采用UL同步过程,系统可以支持无ICI或ISI的UL检测的小区半径为:
Figure PCTCN2016086603-appb-000004
因此从避免干扰角度,UL同步在UDN网络中不像在LTE网络中那么必要。也就是说,当UE下行同步时,UE可以在任何时刻进行UL传输。
下面将结合附图对本发明的实施方式进行详细描述。
本发明的实施例提供一种通信系统如图1所示,包括基站101和多个UE102,其中基站101为UDN系统中的基站,为多个UE102分别提供随机接入的目标小区。本发明的实施例可以应用于UE接入(如图1所示)、基站切换,双链接或多链接的基站增加或转换等场景,其中双链接也称作双连接,多链接也称作多连接。其中,在应用于UE接入场景时,基站101为UE提供待接入小区;在应用于基站切换、双链接或多链接的链路增加或转换等场景时,如图2所示,基站包括:第一基站101-1和第二基站101-2,以下示例中,在基站切换场景中,第一基站101-1为用作UE所切换至的目标基站,第二基站101-2为用作UE切换基站前原先所属的源基站。在双链接或多链接的链路增加或转换场景中,第一基站101-1为用作UE的链路所增加或转换至的目标基站,第二基站101-2为用作UE的链路增加前或转换前原先所属的源基站。
其中,至少一个UE 102可以为手机、平板电脑、笔记本电脑、超级移动个人计算机(Ultra-mobile Personal Computer,简称UMPC)、上网本、个人数字助理(Personal Digital Assistant,简称PDA)等等。本发明对于UE的类型不进行具体限定。需要说明的是,在本发明实施例中,图1、2中UE、基站的数量仅仅是示意性的,根据实际应用场景,可以具有任意数量的UE、基站。
如图3所示,图1、2中所示的各个基站可以包括:处理器201、存储器202、收发器203。
下面结合图3对基站的各个构成部件进行具体的介绍:
处理器201是基站的控制中心,可以是一个处理器,也可以是多个处理元件的统称。例如,处理器201是一个中央处理器(central processing unit,简称CPU),也可以是特定集成电路(Application Specific Integrated Circuit,简称ASIC),或者是被配置成实施本发明实施例的一个或多个集成电路,例如:一个或多个微处理器(digital signal processor,简称DSP),或,一个或者多个现场可编程门阵列(Field Programmable Gate Array,简称FPGA)。处理器201可以通过运行或执行存储在存储器202内的软件程序和/或模块,以及调用存储在存储器202内的数据,执行基站的各种功能。
存储器202,可以是易失性存储器(volatile memory),例如随机存取存储器(random-access memory,简称RAM);或者非易失性存储器(non-volatile memory),例如只读存储器(read-only memory,简称ROM),快闪存储器(flash memory),硬盘(hard disk drive,简称HDD)或固态硬盘(solid-state drive,简称SSD);或者上述种类的存储器的组合,用于存储可实现本发明接入方法的相关应用程序、以及配置文件。
收发器203,可以是基站的收发天线,或者,具有与外界通信能力的通信单元。处理器201、存储器202、收发器203通过总线204连接。总线204可以是工业标准体系结构(英文全称:industry standard architecture,英文简称:ISA)总线、外部设备互连(英文全称:peripheral component,英文简称:PCI)总线或扩展工业标准体系结构(英文全称:extended industry standard architecture,英文简称:EISA)总线等。总线204可以分为地址总线、数据总线、控制总线等。为便于表示,图3中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
在具体实现中,处理器201控制收发器203实现以下功能,收发器203在目标小区向UE发送第一信息,所述第一信息为上行链路授权UL grant消息;在用作第一基站时,收发器203还用作接收UE依据第一信息在上行链路UL上发送的信息。
如图4所示,图1、2中所示的UE可以包括:处理器301、存储器302、收发器303。
下面结合图4对UE的各个构成部件进行具体的介绍:
处理器301是UE的控制中心,可以是一个处理器,也可以是多个处理元件的统称。例如,处理器301是一个中央处理器(central processing unit,简称CPU),也可以是特定集成电路(Application Specific Integrated Circuit,简称ASIC),或者是被配置成实施本发明实施例的一个或多个集成电路,例如:一个或多个微处理器(digital signal processor,简称DSP),或,一个或者多个现场可编程门阵列(Field Programmable Gate Array,简称FPGA)。处理器301可以通过运行或执行存储在存储器302内的软件程序和/或模块,以及调用存储在存储器302内的数据,执行基站的各种功能。
存储器302,可以是易失性存储器(volatile memory),例如随机存取 存储器(random-access memory,简称RAM);或者非易失性存储器(non-volatile memory),例如只读存储器(read-only memory,简称ROM),快闪存储器(flash memory),硬盘(hard disk drive,简称HDD)或固态硬盘(solid-state drive,简称SSD);或者上述种类的存储器的组合,用于存储可实现本发明接入方法的相关应用程序、以及配置文件。
收发器303,可以是UE的收发天线,或者,具有与外界通信能力的通信单元。处理器301、存储器302、收发器303通过总线304连接。总线304可以是工业标准体系结构(英文全称:industry standard architecture,英文简称:ISA)总线、外部设备互连(英文全称:peripheral component,英文简称:PCI)总线或扩展工业标准体系结构(英文全称:extended industry standard architecture,英文简称:EISA)总线等。总线304可以分为地址总线、数据总线、控制总线等。为便于表示,图4中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
在具体实现中,处理器301控制收发器303实现以下功能,UE与基站的目标小区取得下行同步后,收发器303接收基站在目标小区发送的第一信息,所述第一信息为上行链路授权消息;收发器303依据所述第一信息在上行链路UL上发送信息。
下面结合附图,对本发明的实施例进行具体阐述。
本发明实施例提供的接入方法,可以应用于UDN网络中,相对于LTE网络,UDN属于超密网小区覆盖范围相对于LTE的宏小区要小的多。参照图5所示,本发明的实施例提供一种接入方法,应用于上述的通信系统适用于接入(初始接入、重接入(连接重建))、基站切换或者双链接或多链接转换,包括如下步骤:
101、基站在目标小区向UE发送第一信息,第一信息为上行链路授权UL grant消息。
102、UE接收基站在目标小区发送的第一信息。
103、UE依据第一信息在上行链路UL上发送信息。
其中,在应用于接入过程时,该方法还包括:
104、基站接收UE依据第一信息在上行链路UL上发送的信息。
在应用于基站切换过程或者双链接或多链接的基站转换时,则该接入方法具体包括如下两种方式:
方式一:基站切换过程或者双链接或多链接的基站转换由第一基站控制:
201、第一基站在目标小区向UE发送第一信息,第一信息为上行链路授权UL grant消息。
202、UE接收第一基站在目标小区发送的第一信息。
203、UE依据第一信息在上行链路UL上发送信息至第一基站。
204、第一基站接收UE依据第一信息在上行链路UL上发送的信息。
其中,第一基站还需要将第一信息通知第二基站。
方式二:基站切换或者双链接或多链接的基站转换过程由第二基站控制:
301、第二基站在目标小区向UE发送第一信息,第一信息为上行链路授权UL grant消息。
302、UE接收第二基站在目标小区发送的第一信息。
303、UE依据第一信息在上行链路UL上发送信息至第一基站。
304、第一基站接收UE依据第一信息在上行链路UL上发送的信息。
其中,第二基站还需要将第一信息通知第一基站。
此外,上述方案在应用于双链接或多链接的基站转换时,第一基站和第二基站可以均为辅基站,当然一种特殊情况是,UE在宏基站macro eNB增加一条到辅基站SeNB的新的链路时,可以将辅基站SeNB作为上述的第一基站,宏基站作为上述的第二基站,具体新增的链路的过程由宏基站控制时,UE接入辅基站的过程参照步骤301-304的方法,新增的链路的 过程由辅基站控制时,UE接入辅基站的过程参照步骤201-204的方法,具体不再赘述。
在上述方案中,基站直接在目标小区向UE发送上行链路UL授权消息,使得UE能够依据UL授权消息在UL上发送信息,相对于现有技术无需再通过TA机制进行上行同步,对UDN网络简化RA过程,提高系统效率。
基于上述的实施方式,在应用于UE的初始接入或者RRC连接重建过程中,UE需要首先尝试在基站的目标小区的RA过程,参照图6所示,本发明提供方案在应用于接入时具体包括:
401、基站在目标小区为UE配置第一信道,向所述UE发送所述第一信道的配置信息。
具体的额,基站通过系统广播信息向UE发送第一信道的配置信息。
402、UE接收所述第一信道的配置信息。
步骤402具体为UE与基站的目标小区取得下行同步后,接收系统广播信息,在系统广播信息中获取第一信道的配置信息。
在步骤201中,基站在目标小区为UE配置第一信道,第一信道包含用于传输第二信息的资源,具体的第一信道包括上行控制信道PUCCH或随机接入信道PRACH传输第二信息,具体为:对于进入UDN网络小区的UE,基站为UE配置的可以为用于SR(英文全称:Scheduling Request,中文:上行调度请求)的资源,如:PUCCH(英文全称:Physical Uplink Control Channel,中文:物理上行控制信道)资源;当然对于进入LTE网络小区的UE,基站为UE配置的PRACH(英文全称:Physical Random access Channel,中文:物理随机接入信道)资源。具体基站基于目标小区的覆盖范围为UE配置第一信道,具体可以依据以下原则:
1、当小区的目标覆盖较大时,如:当目标小区的覆盖范围大于UE能够免于获取TA进行传输的范围时,基站为UE配置PRACH如UE需要在LTE的小区中向UE传输信息,或者比UE不采用TA进行传输的范围 大时,eNB可以在系统消息中仍然配置PRACH的RA资源;其中,上述系统消息为SIB2。
2、当目标小区的覆盖范围小于UE能够免于获取TA进行传输的范围时,基站为UE配置第一信道,该第一信道可以包括PUCCH或PRACH。示例性的,若配置PUCCH作为第一信道,则对于类似SDN网络等可以去除TA机制的足够小的小区,eNB只在系统消息中配置包含基于竞争的PUCCH(SR资源)的RA资源。
3、基于竞争的PUCCH(SR资源)的资源是从正常的SR资源中预留,以避免可能的冲突。
4、基于竞争的SR资源可以被分组,以向eNB指出随机接入RA(random access)过程消息3(英文全称:message 3,中文:调度传输信息,简称:Msg3)的不同尺寸。
5、基于竞争的PUCCH(SR资源)可以被用于基于竞争和基于非竞争的RA资源目的。
并且,基于上述的原则基站只会为UE配置一种RA资源,即要么配置PUCCH或者配置PRACH。
此外,RA资源的无线块PRB(英文全称:physical resource block)的最大偏移量为
Figure PCTCN2016086603-appb-000005
示例性的,如果选择最大偏移
Figure PCTCN2016086603-appb-000006
则每个PRB通过码域扩展支持最多12个资源,同时采用3倍的时域扩展。
Figure PCTCN2016086603-appb-000007
的这个选择是合理的,因为偏移由最大信道传播时延决定。就像上面原理中提到的,这个时延非常小。
因此,每个PRB中将支持12*3=36个资源,那么2个PRB将支持72个资源,比要求的64个资源更多。这样,在信息传输中可以采用更小的RA资源粒度,使得eNB能够更灵活地配置RA资源。
403、UE在第一信道上发送第二信息,第二信息为上行调度请求。
404、基站接收UE在第一信道发送的第二信息,第二信息为调度请求。其中,一种示例为:该调度请求为SR上行调度请求,该方案中均采用SR为例进行说明,但并不作为一种限制,由于信息传输时双向的因此上行只是作为下行的相对方向,并不包含其他含义。
405、基站检测第二信息,依据第二信息向UE发送第一信息。
可选的,第一信息被无线网络传输标识RNTI加扰,该RNTI可以采用上行调度请求-无线网络传输标识SR-RNTI,SR-RNTI(英文全称:Scheduling Request-Radio Network Tempory Identity,中文:上行调度请求-无线网络临时标识)。该第一信息可以通过RRC重配置命令发送。
406、UE在预定义的搜索空间中通过第一无线网络传输标识搜索基站依据第二信息发送的第一信息。
第一无线网络传输标识采用SR-RNTI时,步骤406中,具体为UE在每个SR-RNTI对应的预设搜索空间搜索UL授权信息。SR-RNTI=tid+10×nC firstchannel;其中,tid是上行调度请求SR的资源的子帧号,
Figure PCTCN2016086603-appb-000008
是每个子帧内部基于竞争的SR的资源索引。其中SR-RNTI由UE选择的SR的资源所决定。
示例性的,第一信道(first Channel)以PUCCH为例,其中基于竞争的PUCCH(SR的资源)可以被UE随机选择。一个示例是:重复使用PUCCH资源索引,比如:
Figure PCTCN2016086603-appb-000009
其中,tid是SR的资源的子帧号,
Figure PCTCN2016086603-appb-000010
是每个子帧内部基于竞争的SR的资源索引。这样,SR-RNTI可以清楚地联系到每个SR的资源。
此外,UE在预定义的搜索空间中通过上行调度请求-无线网络传输标识搜索UL授权信息,每个上行调度请求-无线网络传输标识对应的搜索空间不同,和/或,每个上行调度请求-无线网络传输标识对应的搜索空间是分布式的;即每个SR-RNTI的搜索空间不同且分散。一种示例是通过将SR-RNTI的搜索空间联系到RNTI值,实现UE在预设搜索空间中使用SR-RNTI搜索UL授权信息。具体如下:
Figure PCTCN2016086603-appb-000011
上述示例中:对于SR特定的搜索空间
Figure PCTCN2016086603-appb-000012
其中聚合级别为L,变量Yk被定义为
Yk=(A·Yk-1)modD
其中Y-1=nRNTI≠0,A和D为任意给定的数字,
Figure PCTCN2016086603-appb-000013
ns为一个无线帧中的时隙号。用于nRNTI的RNTI值由SR资源决定。
407、UE向基站发送消息message3,消息3采用上行调度请求-无线网络传输标识SR-RNTI加扰。
其中,步骤407,message3为UE依据第一信息在上行链路UL上发送。
当步骤403中的上行调度请求采用分组指示,通过不同的分组向eNB指明消息3的不同尺寸。
408、基站接收UE发送的消息message3。
其中在步骤207、208中,若调度传输信息支持混合自动重传请求(英文全称:Hybrid Automatic Repeat reQuest,简称:HARQ)则UE向基站重传调度传输信息;基站接收UE重传的调度传输信息。
409、基站向UE发送消息4,消息4用于指示UE竞争解决成功。
410、UE接收基站发送的消息4。
其中,消息4可以包含UE对应的进程解决成功的C-RNTI(英文全称:Cell-RadioNetworkTemporaryIdentifier,中文:小区-无线网络临时标识)。
对于,基站切换或双链接转换或多链接转换的方案,UE接入到目标小区的方法,参照图7所示,包括如下步骤:
501、基站在目标小区向UE发送第一信息,第一信息为上行链路授权UL grant消息。
其中,第一信息通过下述:切换命令、切换控制命令、双链接或多链接的链路增加或转换命令中的至少一项发送。
502、UE接收基站在目标小区发送的第一信息,第一信息为上行链路授权消息。
503、UE依据第一信息在上行链路UL上发送信息。
其中在UE可以依据上行链路授权消息来向基站发送RRC(英文全称:Radio Resource Control,中文:无线资源控制)Connection Reconfiguration Complete无线资源控制切换成功信令,以指示小区切换完成。这样可以快速发起UE到基站的目标小区的UL传输,而不需要执行传统LTE系统的RA过程。参照上述的实施例,在步骤501基站可以为第一基站或者第二基站,步骤503之后,第一基站接收UE在UL上发送的信息,其中当步骤501中的基站为第一基站时,还需要第一基站将第一信息通知第二基站,或者当步骤501中的基站为第二基站时,还需要第二基站将第一信息通知第一基站。
对于基站切换(或者双链接/多链接增加和/或转换)方案,上述机制下的可能问题是:目标基站收到源基站切换准备消息(双链接/多链接增加和/或转换准备消息)后,会产生一个UL授权消息,并在特定的时间段中预留该UL授权消息指定的UL资源。而实际的切换(双链接/多链接增加和/或转换)可能发生在一段时间之后、或者根本没有发生。
情况一:若切换(双链接/多链接增加和/或转换)发生在一段时间之后。考虑UL授权消息的格式,目标基站在发送UL授权消息后需要等待多久不对预留的UL资源进行调度?目标基站并不确切知道UE什么时候会切换(双链接/多链接增加和/或转换),因此很难决定什么时候调度这 些上行资源(指定的UL资源)。考虑UE接收切换命令(双链接/多链接增加和/或转换)以及与目标小区进行下行同步过程中最差情况的时延,调度器需要保守估计。但是,这样对目标基站的调度器设置了要求,意味着切换过程比实际花费更长时间,因为即使UE快速进入到目标小区,调度器也必须等待资源。
为解决情况一的问题:可以对源小区进行一些限制,来限制时延,比如可以将不做随机接入的切换RACH-less handover(Random Access Channel,随机接入信道)(以及不做随机接入的双链接/多链接增加和/或转换)定义为快速触发的切换(双链接/多链接增加和/或转换),即只要eNB判断该切换过程为不需要随机接入的切换,要求切换(双链接/多链接增加和/或转换)被快速触发,即配置上行授权消息指定的UL资源时,以较小的等待时间进行配置,并且要求源基站快速响应或执行对UE的切换,以减少切换时间。因此在上述不做随机接入的切换(双链接/多链接增加和/或转换)中,上行授权消息和/或上行授权消息指定的UL资源都会被以较小的时延进行通知,并且源基站能够快速响应或执行对UE的切换(双链接/多链接增加和/或转换)。虽然目标eNB仍需要考虑UE获取下行同步的时延,但这样可以降低不确定性。或者,目标基站可以在一段时间中分配多个资源,类似短时间段中的SPS(Semi-Persistent Scheduling,半静态调度)分配方式。其中,半静态调度通常为eNB分配半静态地分配一些资源,不需要通过授权信令动态通知,这些资源通过该半静态调度的指令预先被分配,并且是以一定的间隔出现。这里,目标基站可以在一段时间中分配多个资源指的是在该段时间中,以某一间隔,类似半静态调度地通过上行授权信令授予一些资源,即目标基站预留了一些上行资源,不需要UE发出需求指示,在一定的时间即可获得。这样UE不需要每次都依赖动态的授权信令去获取资源,进行上行传输,因此可以减少接入时延。
情况二:如果切换(双链接/多链接增加和/或转换)没有发生。即UE没有使用调度的UL资源,示例性的:比如由于上行同步失败、切换失败或切换到错误小区。目标基站可能只会认为传输丢失;如果UL授权的消息支持HARQ,将可能有一系列HARQ NACK,直到HARQ过程结束, 意味着在2个方向(上行和下行)上浪费资源。
为解决情况二的问题:如果源基站能总是快速发送切换(双链接/多链接增加和/或转换)取消消息,那么此问题被减少。不过源基站在大部分情况下不知道切换(双链接/多链接增加和/或转换)失败,直到UE在另一个小区重建连接。对消息流程的最简单设计是:UL消息不采用HARQ,即对切换过程设置maxHARQ(最大重传次数)-Tx(发送次数)=1。对于双链接转换或多链接转换的方案,其存在与基站切换方案类似的问题,其解决方式采用与上述基站切换方案的情况一和情况二中相同的方法,这里不再赘述。上述方案中“A/B”表示A或者B;A和/或B,表示A、或者B、或者A和B三种情况。
参照图8所示,提供一种基站,用于实施上述的接入方法,包括:
通信单元71,用于在目标小区向UE发送第一信息,所述第一信息为上行链路授权UL grant消息;以便所述UE依据所述第一信息在上行链路UL上发送信息。
在上述方案中,基站直接在目标小区向UE发送上行链路UL授权消息,使得UE能够依据UL授权消息在UL上发送信息,相对于现有技术无需再通过TA机制进行上行同步,对UDN网络简化RA过程,提高系统效率。
可选的,所述基站为待接入小区的第一基站;
或者,
所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中链路增加或转换前的基站中的至少一项;
第一基站的所述通信单元还用于接收UE依据所述第一信息在UL上发送的信息。
可选的,基站还包括:
检测单元72,用于检测第二信息,所述第二信息为调度请求;
所述通信单元71还用于依据所述检测单元72检测的第二信息向所述UE发送所述第一信息。
可选的,所述通信单元71还用于接收UE在第一信道发送的所述第二信息。
可选的,基站还包括:配置单元73,用于在所述目标小区为UE配置第一信道;
所述通信单元71还用于向所述UE发送所述配置单元配置的第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
可选的,所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
可选的,所述配置单元73用于基于所述目标小区的覆盖范围为UE配置第一信道。
可选的,当所述目标小区的覆盖范围大于UE能够免于获取时间提前量TA进行传输的范围时,所述配置单元73用于为UE配置PRACH;
或者,
当所述目标小区的覆盖范围小于UE能够免于获取TA进行传输的范围时,所述配置单元73用于为UE配置第一信道,所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
可选的,用于传输第二信息的资源是基于竞争的。
可选的,所述通信单元71具体用于通过系统广播信息向所述UE发送第一信道的配置信息。
可选的,所述第一信息被第一无线网络传输标识RNTI加扰。
可选的,所述第一基站的通信单元71还用于接收UE依据所述第一信息在UL上发送的消息message3,所述消息3采用第一无线网络传输标 识RNTI加扰。
可选的,所述第一基站的通信单元71还用于向UE发送消息4,所述消息4用于指示所述UE竞争解决成功。
可选的,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
可选的,SR-RNTI=tid+10×nC firstchannel
其中,tid是SR的资源的子帧号,
Figure PCTCN2016086603-appb-000014
是每个子帧内部基于竞争的SR的资源索引。
可选的,所述调度请求采用分组指示,其中通过不同的分组向eNB指明消息3的不同尺寸。
可选的,所述通信单元71具体用于在目标小区通过下述:切换命令、切换控制命令、RRC重配置命令、双链接或多链接中链路增加或转换命令中的任一项向所述UE发送第一信息。
参照图9所示,提供一种UE,包括:
通信单元81,用于接收基站在目标小区发送的第一信息,所述第一信息为上行链路授权消息;
所述通信单元81,还用于依据所述第一信息在上行链路UL上发送信息。
可选的,所述基站为待接入小区的第一基站;
或者,
所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中链路增加或转换前的基站中的至少一项;
所述通信单元81具体用于依据所述第一信息在上行链路UL上发送 信息至所述第一基站。
可选的,所述通信单元81,具体用于所述UE接收所述基站依据第二信息向所述UE发送的第一信息。
可选的,所述通信单元81,还体用于在第一信道上发送第二信息,所述第二信息为调度请求。
可选的,所述通信单元81,还体用于接收所述第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
可选的,所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
可选的,所述通信单元81,具体用于接收系统广播信息,并在所述系统广播信息中获取所述第一信道的配置信息。
可选的,所述UE还包括:
同步单元82,用于与所述基站的目标小区取得下行同步。
可选的,所述通信单元81具体用于在预定义的搜索空间中通过第一无线网络传输标识搜索所述基站依据第二信息发送的所述第一信息。
可选的,每个所述第一无线网络传输标识对应的搜索空间不同,和/或,每个所述第一无线网络传输标识对应的搜索空间是分布式的。
可选的,所述第一信息被第一无线网络传输标识RNTI加扰。
可选的,所述通信单元81具体用于依据所述第一信息在上行链路UL上向所述第一基站发送消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
可选的,所述通信单元81还用于:
接收所述第一基站发送的消息4,所述消息4用于指示所述UE竞争解决成功。
可选的,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
可选的,所述通信单元81具体用于接收基站在目标小区通过下述:切换命令、切换控制命令、RRC重配置命令、双链接或多链接中链路增加或转换命令中的任一项发送的所述第一信息。
此外,还提供一种计算可读媒体(或介质),包括在被执行时进行以下操作的计算机可读指令:执行上述实施例中的方法的操作。
另外,还提供一种计算机程序产品,包括上述计算机可读介质。
应理解,在本发明的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、设备和方法,可以通过其它的方式实现。例如,以上所描述的设备实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,设备或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开 的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(英文全称:read-only memory,英文简称:ROM)、随机存取存储器(英文全称:random access memory,英文简称:RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。最后应当说明的是:以上实施例仅用以说明本发明的技术方案而非对其限制;尽管参照实施例对本发明进行了详细的说明,所属领域的普通技术人员应当理解:依然可以对本发明的具体实施方式进行修改或者对部分技术特征进行等同替换;而不脱离本发明技术方案的精神,其均应涵盖在本发明请求保护的技术方案范围当中。

Claims (64)

  1. 一种接入方法,其特征在于,包括:
    基站在目标小区向UE发送第一信息,所述第一信息为上行链路授权UL grant消息;
    以便所述UE依据所述第一信息在上行链路UL上发送信息。
  2. 根据权利要求1所述的方法,其特征在于,
    所述基站为待接入小区的第一基站;
    或者,
    所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中链路增加或转换前的基站中的至少一项;
    所述方法还包括:
    所述第一基站接收UE依据所述第一信息在UL上发送的信息。
  3. 根据权利要求1或2所述的方法,其特征在于,
    所述基站检测第二信息,所述第二信息为调度请求;
    依据所述第二信息向所述UE发送所述第一信息。
  4. 根据权利要求3所述的方法,其特征在于,所述基站检测第二信息前,还包括:
    所述基站接收UE在第一信道发送的所述第二信息。
  5. 根据权利要求4所述的方法,其特征在于,所述基站在所述目标小区为UE配置第一信道,并向所述UE发送所述第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
  6. 根据权利要求4或5所述的方法,其特征在于,
    所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
  7. 根据权利要求5或6所述的方法,其特征在于,所述基站在目标小区为UE配置第一信道,包括:
    所述基站基于所述目标小区的覆盖范围为UE配置第一信道。
  8. 根据权利要求7所述的方法,其特征在于,
    当所述目标小区的覆盖范围大于UE能够免于获取时间提前量TA进行传输的范围时,所述基站为UE配置PRACH;
    或者,
    当所述目标小区的覆盖范围小于UE能够免于获取TA进行传输的范围时,所述基站为UE配置第一信道,所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
  9. 根据权利要求4-8任一项所述的方法,其特征在于,用于传输第二信息的资源是基于竞争的。
  10. 根据权利要求5-8任一项所述的方法,其特征在于,所述向所述UE发送所述第一信道的配置信息,包括:所述基站通过系统广播信息向所述UE发送第一信道的配置信息。
  11. 根据权利要求1-10任一项所述的方法,其特征在于,所述第一信息被第一无线网络传输标识RNTI加扰。
  12. 根据权利要求2所述的方法,其特征在于,所述第一基站接收UE依据所述第一信息在UL上发送的信息包括:
    所述第一基站接收UE依据所述第一信息在UL上发送的消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
  13. 根据权利要求12所述的方法,其特征在于,所述方法还包括:
    所述第一基站向UE发送消息4,所述消息4用于指示所述UE竞争解决成功。
  14. 根据权利要求11-13任一项所述的方法,其特征在于,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
  15. 根据权利要求14所述的方法,其特征在于,
    SR-RNTI=tid+10×nC firstchannel
    其中,tid是上行调度请求SR的资源的子帧号,
    Figure PCTCN2016086603-appb-100001
    是每个子帧内部基于竞争的SR的资源索引。
  16. 根据权利要求3所述的方法,其特征在于,
    所述调度请求采用分组指示,其中通过不同的分组向基站指明消息3的不同尺寸。
  17. 根据权利要求1-16任一项所述的方法,其特征在于,所述基站在目标小区向UE发送第一信息,包括:
    所述基站在目标小区通过下述:切换命令、切换控制命令、无线资源控制RRC重配置命令、双链接或多链接的链路增加或转换命令中的任一项向所述UE发送第一信息。
  18. 一种接入方法,其特征在于,包括:
    UE接收基站在目标小区发送的第一信息,所述第一信息为上行链路授权消息;
    所述UE依据所述第一信息在上行链路UL上发送信息。
  19. 根据权利要求18所述的方法,其特征在于,
    所述基站为待接入小区的第一基站;
    或者,
    所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多 链接中链路增加或转换前的基站中的至少一项;
    所述UE依据所述第一信息在上行链路UL上发送信息方法包括:
    所述UE依据所述第一信息在上行链路UL上发送信息至所述第一基站。
  20. 根据权利要求18或19所述的方法,其特征在于,所述UE接收基站在目标小区发送的第一信息,包括:
    所述UE接收所述基站依据第二信息向所述UE发送的第一信息。
  21. 根据权利要求20所述的方法,其特征在于,所述方法还包括:
    所述UE在第一信道上发送第二信息,所述第二信息为调度请求。
  22. 根据权利要求21所述的方法,其特征在于,所述方法还包括:
    所述UE接收所述第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
  23. 根据权利要求21或22所述的方法,其特征在于,
    所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
  24. 根据权利要求22或23所述的方法,其特征在于,所述UE接收所述第一信道的配置信息,包括:
    所述UE接收系统广播信息,并在所述系统广播信息中获取所述第一信道的配置信息。
  25. 根据权利要求22-24任一项所述的方法,其特征在于,所述UE接收所述第一信道的配置信息前,所述方法还包括:
    所述UE与所述基站的目标小区取得下行同步。
  26. 根据权利要求20-25任一项所述的方法,其特征在于,所述UE接收所述基站依据所述第二信息向所述UE发送的第一信息,包括:
    所述UE在预定义的搜索空间中通过第一无线网络传输标识搜索所述 基站依据第二信息发送的所述第一信息。
  27. 根据权利要求26所述的方法,其特征在于,每个所述第一无线网络传输标识对应的搜索空间不同,和/或,每个所述第一无线网络传输标识对应的搜索空间是分布式的。
  28. 根据权利要求18-27任一项所述的方法,其特征在于,所述第一信息被第一无线网络传输标识RNTI加扰。
  29. 根据权利要求19任一项所述的方法,其特征在于,所述UE依据所述第一信息在上行链路UL上发送信息包括:
    所述UE依据所述第一信息在上行链路UL上向所述第一基站发送消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
  30. 根据权利要求29所述的方法,其特征在于,所述方法还包括:
    接收所述第一基站发送的消息4,所述消息4用于指示所述UE竞争解决成功。
  31. 根据权利要求28-30任一项所述的方法,其特征在于,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
  32. 根据权利要求18-31任一项所述的方法,其特征在于,所述UE接收基站在目标小区发送的第一信息,包括:
    所述UE接收基站在目标小区通过下述:切换命令、切换控制命令、RRC重配置命令、双链接或多链接的链路增加或转换命令中的任一项发送的所述第一信息。
  33. 一种基站,其特征在于,包括:
    通信单元,用于在目标小区向UE发送第一信息,所述第一信息为上行链路授权UL grant消息;以便所述UE依据所述第一信息在上行链路UL上发送信息。
  34. 根据权利要求33所述的基站,其特征在于,
    所述基站为待接入小区的第一基站;
    或者,
    所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中链路增加或转换前的基站中的至少一项;
    第一基站的所述通信单元还用于接收UE依据所述第一信息在UL上发送的信息。
  35. 根据权利要求33或34所述的基站,其特征在于,还包括:
    检测单元,用于检测第二信息,所述第二信息为调度请求;
    所述通信单元还用于依据所述检测单元检测的第二信息向所述UE发送所述第一信息。
  36. 根据权利要求35所述的基站,其特征在于,
    所述通信单元还用于接收UE在第一信道发送的所述第二信息。
  37. 根据权利要求36所述的基站,其特征在于,
    还包括:配置单元,用于在所述目标小区为UE配置第一信道;
    所述通信单元还用于向所述UE发送所述配置单元配置的第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
  38. 根据权利要求36或37所述的基站,其特征在于,
    所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
  39. 根据权利要求37或38所述的基站,其特征在于,所述配置单元用于基于所述目标小区的覆盖范围为UE配置第一信道。
  40. 根据权利要求39所述的基站,其特征在于,
    当所述目标小区的覆盖范围大于UE能够免于获取时间提前量TA进 行传输的范围时,所述配置单元用于为UE配置PRACH;
    或者,
    当所述目标小区的覆盖范围小于UE能够免于获取TA进行传输的范围时,所述配置单元用于为UE配置第一信道,所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
  41. 根据权利要求36-40任一项所述的基站,其特征在于,用于传输第二信息的资源是基于竞争的。
  42. 根据权利要求37-40任一项所述的基站,其特征在于,所述通信单元具体用于通过系统广播信息向所述UE发送第一信道的配置信息。
  43. 根据权利要求33-42任一项所述的基站,其特征在于,所述第一信息被第一无线网络传输标识RNTI加扰。
  44. 根据权利要求34所述的基站,其特征在于,所述第一基站的通信单元还用于接收UE依据所述第一信息在UL上发送的消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
  45. 根据权利要求44所述的基站,其特征在于,所述第一基站的通信单元还用于向UE发送消息4,所述消息4用于指示所述UE竞争解决成功。
  46. 根据权利要求43-45任一项所述的基站,其特征在于,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
  47. 根据权利要求46所述的基站,其特征在于,
    SR-RNTI=tid+10×nC firstchannel
    其中,tid是SR的资源的子帧号,
    Figure PCTCN2016086603-appb-100002
    是每个子帧内部基于竞争的SR的资源索引。
  48. 根据权利要求35所述的基站,其特征在于,
    所述调度请求采用分组指示,其中通过不同的分组向eNB指明消息 3的不同尺寸。
  49. 根据权利要求33-48任一项所述的基站,其特征在于,所述通信单元具体用于在目标小区通过下述:切换命令、切换控制命令、RRC重配置命令、双链接或多链接的链路增加或转换命令中的任一项向所述UE发送第一信息。
  50. 一种UE,其特征在于,包括:
    通信单元,用于接收基站在目标小区发送的第一信息,所述第一信息为上行链路授权消息;
    所述通信单元,还用于依据所述第一信息在上行链路UL上发送信息。
  51. 根据权利要求50所述的UE,其特征在于,
    所述基站为待接入小区的第一基站;
    或者,
    所述基站为用作目标基站的第一基站,或者所述基站为用作源基站的第二基站;其中,所述目标基站为切换后的基站、双链接或多链接中链路增加或转换后的基站中的至少一项;源基站为切换前的基站、双链接或多链接中增加或转换前的基站中的至少一项;
    所述通信单元具体用于依据所述第一信息在上行链路UL上发送信息至所述第一基站。
  52. 根据权利要求50或51所述的UE,其特征在于,所述通信单元,具体用于所述UE接收所述基站依据第二信息向所述UE发送的第一信息。
  53. 根据权利要求52所述的UE,其特征在于,所述通信单元,还体用于在第一信道上发送第二信息,所述第二信息为调度请求。
  54. 根据权利要求53所述的UE,其特征在于,所述通信单元,还体用于接收所述第一信道的配置信息,所述第一信道包含用于传输第二信息的资源。
  55. 根据权利要求53或54所述的UE,其特征在于,
    所述第一信道包括上行控制信道PUCCH或随机接入信道PRACH。
  56. 根据权利要求54或55所述的UE,其特征在于,所述通信单元,具体用于接收系统广播信息,并在所述系统广播信息中获取所述第一信道的配置信息。
  57. 根据权利要求54-56任一项所述的UE,其特征在于,所述UE还包括:
    同步单元,用于与所述基站的目标小区取得下行同步。
  58. 根据权利要求52-57任一项所述的UE,其特征在于,所述通信单元具体用于在预定义的搜索空间中通过第一无线网络传输标识搜索所述基站依据第二信息发送的所述第一信息。
  59. 根据权利要求58所述的UE,其特征在于,每个所述第一无线网络传输标识对应的搜索空间不同,和/或,每个所述第一无线网络传输标识对应的搜索空间是分布式的。
  60. 根据权利要求50-59任一项所述的UE,其特征在于,所述第一信息被第一无线网络传输标识RNTI加扰。
  61. 根据权利要求51所述的UE,其特征在于,所述通信单元具体用于依据所述第一信息在上行链路UL上向所述第一基站发送消息message3,所述消息3采用第一无线网络传输标识RNTI加扰。
  62. 根据权利要求61所述的UE,其特征在于,所述通信单元还用于:
    接收所述第一基站发送的消息4,所述消息4用于指示所述UE竞争解决成功。
  63. 根据权利要求60-62任一项所述的UE,其特征在于,所述第一无线网络传输标识RNTI为上行调度请求-无线网络传输标识SR-RNTI。
  64. 根据权利要求50-63任一项所述的UE,其特征在于,所述通信 单元具体用于接收基站在目标小区通过下述:切换命令、切换控制命令、RRC重配置命令、双链接或多链接的链路增加或转换命令中的任一项发送的所述第一信息。
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