WO2012152154A1 - 随机接入方法及装置 - Google Patents

随机接入方法及装置 Download PDF

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Publication number
WO2012152154A1
WO2012152154A1 PCT/CN2012/073354 CN2012073354W WO2012152154A1 WO 2012152154 A1 WO2012152154 A1 WO 2012152154A1 CN 2012073354 W CN2012073354 W CN 2012073354W WO 2012152154 A1 WO2012152154 A1 WO 2012152154A1
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WIPO (PCT)
Prior art keywords
random access
base station
physical random
access channel
subframe
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PCT/CN2012/073354
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English (en)
French (fr)
Inventor
谢峰
刘扬
黄亚达
艾建勋
陈琳
施小娟
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012152154A1 publication Critical patent/WO2012152154A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • a base station is a device that provides wireless access for a user equipment (User Equipment, UE for short), and one base station may include one or more serving cells.
  • a cell can provide communication services for a certain range of UEs. Different cells may have different coverage areas. Generally, the cells can be divided into macro cells and pico cells according to the coverage of the cells and the purpose of deployment.
  • a femto cell correspondingly, a base station providing these cells may also be referred to as a macro base station, a micro base station, and a home base station (pico base station).
  • the cell may also have different access modes: usually an ordinary cell can provide access services for any user, such a cell is called an open cell; and for a home or enterprise application environment, it is required to limit access.
  • a Closed Subscriber Group (CSG) cell or a Closed cell can only allow specified users (ie members) to access; or a hybrid cell While providing access to member users in priority, it is also possible to provide access services for non-member users.
  • CSG Closed Subscriber Group
  • a hybrid cell While providing access to member users in priority, it is also possible to provide access services for non-member users.
  • a closed cell or a hybrid cell is a typical feature of a home base station, although in some cases other types of base stations (e.g., macro base stations) may also be configured with closed or hybrid cells.
  • a radio access network may include multiple types of cells, that is, a macro cell, a micro cell, and a pico cell. Such a radio access network may be referred to as a heterogeneous network (Heternet network for short).
  • Heternet network When different types of cells are deployed in the same frequency, there may be relatively large interference in the boundary area or the covered edge area of the two cells.
  • ABS Almost Blank Subframe
  • the cell that generates interference in the neighboring cell configures the predetermined downlink subframe as an ABS subframe, and in the ABS subframe, the cell that generates the interference will reduce the downlink transmission or downlink transmission with a lower power.
  • the cell that generates interference in the neighboring cell configures the predetermined downlink subframe as a subframe of a Multimedia Broadcast multicast service Single Frequency Network (MBSFN), and the cell that generates interference will only The downlink control area of 2 to 3 symbols is transmitted, and the downlink transmission is not performed in the remaining symbols).
  • MBSFN Multimedia Broadcast multicast service Single Frequency Network
  • the downlink transmission of the victim cell will not occur on the corresponding subframe (which may be referred to as a protected subframe) of the victim cell corresponding to the ABS subframe (or MBSFN subframe) of the over-excited cell. Due to a large interference, the downlink transmission of the victim cell on these subframes can be protected.
  • the uplink resource that the UE performs the random access is corresponding to the downlink resource, and the downlink resource used by the UE in the coverage area or the edge area of the cell is restricted, and then the cell is randomly connected.
  • the incoming resources are restricted accordingly, and if the UE does not perform random access according to the restricted random access resources or does not know the limitation of the random access resources, the random access of the user times out or fails.
  • a random access method including: acquiring, by a user equipment, information for indicating a predetermined physical random access channel sent by a base station, where the predetermined physical random access The random access response corresponding to the random access sequence carried on the channel is transmitted on the protected subframe.
  • the performing, by the UE, the random access on the information indicating the predetermined physical random access channel comprises: sending, by the UE, a random access sequence on the indicated predetermined physical random access channel; Receiving a random access response that the base station responds to the random access sequence.
  • the protected subframe includes: a subframe corresponding to an almost empty subframe (ABS) of a neighboring cell or a subframe corresponding to an MBSFN subframe of a neighboring cell.
  • said predetermined physical random access channel is a subset of a set of physical random access channels available to the system.
  • the indication information of the predetermined physical random access channel and the indication information of the physical random access channel available to the system jointly indicate the predetermined physical random access channel, where the physical random access available to the system The indication information of the channel is used to indicate a set of physical random access channels available to the system.
  • said random access sequence transmitted on a predetermined physical random access channel is different from a random access sequence transmitted on a physical random access channel available to said system.
  • a random access method including: determining, by a base station, a predetermined physical random access channel, where a random access sequence carried on the predetermined physical random access channel corresponds to The random access response is transmitted on the protected subframe; the base station transmits information of the predetermined physical random access channel to the UE.
  • the method further includes: the base station receiving, on the predetermined physical random access channel, the random An access sequence; the base station transmitting a random access response corresponding to the random access sequence on the protected subframe.
  • the protected subframe includes: a subframe corresponding to an almost empty subframe (ABS) of a neighboring cell or a subframe corresponding to an MBSFN subframe of a neighboring cell.
  • the base station sends the information of the predetermined physical random access channel to the UE by one of the following methods or any combination thereof: a system message, a radio resource control RRC connection reconfiguration message, and downlink control information.
  • the RRC connection reconfiguration message is transparently transmitted by the serving base station of the UE.
  • the base station comprises: a macro base station, a micro base station or a home base station.
  • a random access device which is applied to a UE, and includes: an acquiring module, configured to acquire information sent by a base station to indicate a predetermined physical random access channel, where And the random access response corresponding to the random access sequence carried on the predetermined physical random access channel is sent on the protected subframe; the random access module is configured to indicate the predetermined physical random access channel in the information Random access is performed on it.
  • the random access module includes: a first sending module, configured to send a random access sequence on the indicated predetermined physical random access channel; a first receiving module, configured to receive the A random access response in response to a random access sequence.
  • a random access device which is applied to a base station, and includes: a second determining module, configured to determine a predetermined physical random access channel, where the predetermined physical random access The random access response corresponding to the random access sequence carried on the inbound channel is sent on the protected subframe.
  • the second sending module is configured to send the information of the predetermined physical random access channel to the UE.
  • the foregoing apparatus further includes: a second receiving module, configured to receive a random access sequence sent by the UE on the predetermined physical random access channel; and a third sending module, configured to be in the protected A random access response corresponding to the random access sequence is transmitted on the subframe.
  • the UE acquires information for indicating a predetermined physical random access channel sent by the base station, where the random access response corresponding to the random access sequence carried on the predetermined physical random access channel is in the protected sub- Transmitting on the frame, and then the UE performs random access on the information indicating the predetermined physical random access channel,
  • the random access may be performed according to the predetermined physical random access channel (ie, the restricted physical random access channel) indicated by the base station, and the random access sequence of the UE is corresponding to the UE.
  • FIG. 1 is a schematic diagram of coverage of a heterogeneous network according to the related art
  • FIG. 2 is a first flowchart of a random access method according to an embodiment of the present invention
  • FIG. 3 is a random access according to an embodiment of the present invention.
  • FIG. 4 is a first structural block diagram of a random access device according to an embodiment of the present invention.
  • FIG. 5 is a first block diagram of a preferred structure of a random access device according to an embodiment of the present invention;
  • FIG. 7 is a block diagram of a preferred second structure of a random access device according to an embodiment of the present invention;
  • FIG. 8 is a random access according to a preferred embodiment of the present invention.
  • FIG. 9 is a second flowchart of a random access method in accordance with a preferred embodiment of the present invention; and
  • FIG. 10 is a third flowchart of a random access method in accordance with a preferred embodiment of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • FIG. 2 is a first flowchart of a random access method according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps S202 to S204.
  • Step S202 The UE acquires information used by the base station to indicate a predetermined physical random access channel, where the random access response corresponding to the random access sequence carried on the predetermined physical random access channel is on the protected subframe. Send it.
  • Step S204 The UE performs random access on the information indicating the predetermined physical random access channel. Through the foregoing steps, the UE acquires information that is sent by the base station to indicate a predetermined physical random access channel, where the random access response corresponding to the random access sequence carried on the predetermined physical random access channel is in the protected subframe.
  • the UE performs random access on the predetermined physical random access channel, so that the UE performs the random access resource correspondingly, and the predetermined physical random access channel may be indicated according to the base station. (that is, the restricted physical random access channel) performs random access, and the random access response corresponding to the UE random access sequence is transmitted on the protected subframe, which overcomes the related technology in the UE due to random access resources.
  • the limitation causes the user to randomly timeout or fail, which increases the probability of random access.
  • the UE may implement random access in the following manner: the UE sends a random access sequence on the indicated predetermined physical random access channel; the UE receives the random access that the base station responds to the random access sequence. response.
  • the protected subframe in step S202 includes one of: a subframe corresponding to an almost empty subframe (ABS) of a neighboring cell or an MBSFN subframe corresponding to a neighboring cell.
  • Subframe For example, the protected subframe is set to be the subframe corresponding to the ABS.
  • the downlink transmission is reduced in the ABS subframe or the downlink transmission is performed at a lower power, so that the subframe corresponding to the ABS is subjected to the ABS subframe.
  • the interference of the transmission channel will be greatly reduced, thereby improving the accuracy of the transmission; in the application of the MBSFN subframe, the cell generating the interference will only transmit the downlink control region of 2 to 3 symbols, but not in the remaining symbols. Downlink transmission.
  • the interference received on the corresponding subframe (protected subframe) of the victim cell corresponding to the MBSFN subframe is greatly reduced, thereby improving the accuracy of the transmission.
  • the predetermined physical random access channel is a subset of a set of physical random access channels available to the system.
  • the physical random access channel used to carry the UE may be indicated to the UE in multiple manners, and may be indicated in a direct or indirect manner.
  • the indication is performed in a direct manner: for example, the resource location of the physical random access channel is directly notified to the UE, and the amount of information transmitted by signaling in this manner is relatively large.
  • the indication is performed in an indirect manner: for example: the predetermined physical random access channel may be indicated by the indication information of the predetermined physical random access channel and the indication information of the physical random access channel available to the system, wherein the available physical of the system.
  • the indication information of the random access channel is used to indicate a set of physical random access channels available to the system, which is superior.
  • the index value of the physical random access channel used for carrying the random access of the UE in all random access channels may be transmitted, so that the amount of information transmitted by signaling in this manner is relatively small.
  • the random access code sent on the predetermined physical random access channel is different from the random access code sent on the physical random access channel available to the system.
  • the random access codes for random access by each user are different, and the random access code sent on the predetermined physical random access channel is sent on the physical random access channel available to the system.
  • the random access code is distinguished, and the user distinguishing is implemented indirectly, so that the base station can determine the random access channel used by the UE by determining the random access code (whether it is a predetermined random access channel or a physics available to the system). Random access channel).
  • This embodiment provides a random access method.
  • FIG. 3 is a first flowchart of a random access method according to an embodiment of the present invention. As shown in FIG.
  • Step S302 Determine a predetermined physical random access channel, where the random access response corresponding to the random access sequence carried on the predetermined physical random access channel is sent on the protected subframe.
  • Step S304 The base station sends information about the predetermined physical random access channel to the UE.
  • the base station determines to determine a predetermined physical random access channel, where the random access response corresponding to the random access sequence carried on the predetermined physical random access channel is transmitted on the protected subframe, and the base station will reserve The information of the physical random access channel is sent to the UE, so that when the resource for random access by the UE is restricted, the base station may perform a predetermined physical random access channel (ie, a restricted physical random access channel).
  • the method further includes: the base station receiving the random access sequence sent by the UE on the predetermined physical random access channel; and transmitting, by the base station, the random access sequence on the protected subframe Random access response.
  • a predetermined downlink subframe is configured to be an almost blank subframe (Almost Blank Subframe, abbreviated as ABS), and the downlink received power of the interfered cell in the subframe corresponding to the ABS is better.
  • the preferred embodiment sends a random access response on the subframe, which reduces the interference of the base station transmitting the random access response, and correspondingly improves the accuracy of the UE receiving the random access response.
  • the protected subframe in step S302 includes one of: a subframe corresponding to an almost empty subframe ABS of a neighboring cell or a subframe corresponding to an MBSFN subframe of a neighboring cell. .
  • the protected subframe is set to the subframe corresponding to the ABS.
  • the downlink transmission is reduced in the ABS subframe or the downlink transmission is performed at a lower power, so that the subframe corresponding to the ABS is transmitted by the ABS subframe.
  • the base station sends the information of the physical random access channel to one of the following manners or any combination thereof.
  • the base station may send the information to the UE in the foregoing multiple manners, for example, when the UE is in an idle state, may pass a system message, such as a broadcast mode; At the time, the base station can re-allocate the message through a system message or an RRC connection.
  • the RRC connection reconfiguration message is transparently transmitted by the serving base station of the UE.
  • the base station comprises: a macro base station, a micro base station or a home base station.
  • the above random access method can be used for access, which improves the applicable range of the method.
  • two random access softwares are provided for performing the technical solutions described in the above embodiments and preferred embodiments.
  • a storage medium is further provided, and the random access software is stored in the storage medium, and the storage medium includes, but is not limited to, an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
  • the embodiment of the present invention further provides two types of random access devices, which may be used to implement the foregoing random access method and a preferred implementation manner, which have been described, and are not described again. The modules involved in the device are described.
  • FIG. 4 is a first structural block diagram of a random access device according to an embodiment of the present invention.
  • the device may be applied to a UE.
  • the device includes: an obtaining module 42 and a random access module 44.
  • the obtaining module 42 is configured to acquire information about the predetermined physical random access channel sent by the base station, where the random access response corresponding to the random access sequence carried on the predetermined physical random access channel The transmission is performed on the protected subframe;
  • the random access module 44 is connected to the obtaining module 42 and configured to perform random access on the predetermined physical random access channel indicated by the information acquired by the obtaining module 42.
  • FIG. 5 is a block diagram of a preferred first structure of a random access device according to an embodiment of the present invention. As shown in FIG.
  • the random access module 44 includes: a first sending module 442, a first receiving module 444, and the following The structure is described in detail: the first sending module 442 is configured to send a random access sequence on the indicated predetermined physical random access channel; the first receiving module 444 is connected to the first sending module 442, and is configured to receive the base station to the first The random access response sent by the sending module 442 is a random access response.
  • FIG. 6 is a second structural block diagram of a random access device according to an embodiment of the present invention. The device may be applied to a base station, where the device includes: a second determining module 62 and a second sending module 64. The foregoing structure is described in detail below.
  • the second determining module 62 is configured to determine a predetermined physical random access channel, where the random access response corresponding to the random access sequence carried on the predetermined physical random access channel is sent on the protected subframe;
  • the second sending module 64 is connected to the second determining module 62, and is configured to send information about the predetermined physical random access channel determined by the second determining module 62 to the UE.
  • FIG. 7 is a block diagram of a preferred second structure of a random access device according to an embodiment of the present invention. As shown in FIG. 7, the device further includes: a second receiving module 72 and a third transmitting module 74.
  • the second receiving module 72 is configured to receive a random access sequence sent by the UE on a predetermined physical random access channel
  • the third sending module 74 is connected to the second determining module 72, for the protected sub
  • a random access response corresponding to the random access sequence received by the second receiving module is transmitted on the frame.
  • the boundary area of the two cells or the edge area of the coverage may be There are relatively large interferences.
  • the cell that interferes with the neighboring cell is an aggressor cell, which is in the overlapping area or edge region of different types of cells in the heterogeneous network or is compared.
  • these cells may be referred to as victim cells (Victim UEs), and UEs in the victim cell may be referred to as victim UEs (Victim UEs).
  • the macro-femto coexists, if a UE is within the coverage of the CSG Femto cell and cannot access the CSG cell, the macro UE (MUE) is strongly interfered by the femto, that is, the Victim UE; or In a macro-femto scenario, if a UE is in the range of coverage range extension (CRE), the pico UE (PUE) is strongly interfered by the macro, and the cell is a Victim cell.
  • the predetermined downlink subframe may be configured as an Almost Blank Subframe (abbreviated as ABS) in the ABS subframe. In the ABS subframe, the interference cell will reduce downlink transmission or downlink transmission with relatively low power.
  • ABS Almost Blank Subframe
  • the cell that generates interference in the neighboring cell configures the predetermined downlink subframe as a subframe of a Multimedia Broadcast multicast service Single Frequency Network (MBSFN), and the cell that generates interference will only The downlink control area of 2 to 3 symbols is transmitted, and the downlink transmission is not performed in the remaining symbols).
  • MBSFN Multimedia Broadcast multicast service Single Frequency Network
  • the downlink transmission of the victim cell will not occur on the corresponding subframe (which may be referred to as a protected subframe) of the victim cell corresponding to the ABS subframe (or MBSFN subframe) of the over-excited cell. Due to a large interference, the downlink transmission of the victim cell on these subframes can be protected.
  • the uplink resource that the UE performs the random access corresponds to the downlink resource, and the downlink resource used by the victim cell for transmission is restricted, and the resource for the random access of the victim cell is limited accordingly.
  • the user random access timed out or failed.
  • the victim cell receives the physical random access signal information that is available to the victim cell and performs random access.
  • the UE accesses the serving cell through a random access procedure, in which the UE sends a random access code to the selected cell, and the random access code is sent on a specific physical random access channel.
  • the base station may be configured with physical random access channels of different densities, and different physical random access channels may be distinguished by different time-frequency resources.
  • different physical random access channels of the FDD system pass different subframes (ie, time resources). Differentiate, different physical random access channels of the TDD system are distinguished by time-frequency resources.
  • the base station After receiving the random access code on the physical random access channel, the base station sends a random access response to the UE in the random access response window, where the random access response is a common search space (PDCCH) through the downlink control channel (PDCCH).
  • the downlink control information (DCI) on the search space) is scheduled.
  • the common search space of each subframe can only accommodate up to 4 downlink control information, and each random access response in random access corresponds to one or more random connections received on one physical random access channel.
  • the code is entered, so the maximum number of random access codes received on the four physical random access channels is responded to in one protected subframe.
  • the preferred embodiment of the present invention provides a random access method, and the random access method includes the following steps:
  • the present invention provides a random access method, and the method includes the following steps: Step S2: The Victim UE receives the pair of Victim sent by the base station. Physical random access channel information available to the UE; Step S4 : The Victim UE transmits the random access code using the physical random access channel indicated by the information.
  • the base station sends downlink control information for scheduling a random access response on the protected subframe, where the method sends downlink control information on the protected subframe, so that The transmitted signal avoids the interference of the over-excited cell in the subframe, and ensures the accuracy of receiving the downlink control information.
  • the base station sends downlink control information for scheduling a random access response, so the protected subframe carrying the downlink control information is in a random access response window.
  • the accuracy of the random access response being received is guaranteed.
  • the base station further sends a random access response on the protected subframe; the method sends a random access response on the protected subframe, so that the random access response is sent.
  • the interference of the over-excited cell in the subframe is avoided, and the accuracy of the random access response is received.
  • the step S2 may be implemented in the following manners by using the method to receive the physical random access channel information that is sent by the base station to the Victim UE.
  • the Victim UE receives the base station by using a system message and/or an RRC connection.
  • the message and/or downlink control information is used to send physical random access channel information available to the Victim UE.
  • the RRC connection reconfiguration message is transparently transmitted by the serving base station of the Victim UE; as a further preferred embodiment, the non-Victim UE (the UE other than the Victim UE in the mobile communication system) receives all UEs sent by the base station.
  • the available physical random access channel information which ensures that other UEs other than the Victim UE access through the prior art, reduces the random access to the existing system, and improves system compatibility.
  • the non-Victim UE sends the random access code by using the physical random access channel indicated by the physical random access channel information available to all UEs; or the physical random access used by the non-Victim UE to send the random access code
  • the channel is a physical random access channel available to all UEs and is not a physical random access channel available to the Victim UE;
  • the physical random access channel available to the Victim UE is a subset of physical random access channels available to all UEs.
  • the physical random access channel information available to the Victim UE indicates Victim.
  • the physical random access signal available to the UE is a subset of the physical random access channels available to all UEs.
  • the physical random access channel information available to the Victim UE includes all Physical random access channel information and indication information available to the UE, the indication information and the physical random access channel information available to all UEs jointly indicate a physical random access channel available to the Victim UE.
  • the Victim UE receives the random access code information available to the Victim UE sent by the base station, and the Victim UE sends the random access code available to the Victim UE by using the physical random access channel available to the Victim UE;
  • the physical random access channel information indicates time domain and/or frequency domain resources occupied by one or more physical random access channels.
  • the base station in this embodiment may include a micro base station and a macro base station.
  • FIG. 8 is a first flowchart of a random access method according to a preferred embodiment of the present invention. As shown in FIG. 8, the flow of the method includes the following steps. S802 and step S804. Step S802: The Victim UE receives the physical random access channel information that is sent by the base station and is available to the Victim UE. Step S804: The Victim UE sends a random access code by using the indicated physical random access channel of the information. Preferred Embodiment 3 This embodiment provides a random access method, and FIG. 9 is a second flowchart of a random access method according to a preferred embodiment of the present invention.
  • Step S902 The Victim UE receives the physical random access channel information that is sent by the base station and is available to the Victim UE.
  • Step S904 The Victim UE sends the random access code by using the physical random access channel indicated by the information.
  • Step S906 The base station is protected. Sending downlink control information for scheduling a random access response on the subframe;
  • Step S908 The base station sends a random access response on the protected subframe;
  • Step S910 The UE sends a message 3 to the base station.
  • the present invention proposes a random access method, so that the base station can send the random access response of the Victim UE in the protected subframe, thereby reducing the access delay. And probability of failure.
  • Preferred Embodiment 4 This embodiment provides a random access method, and the method in this embodiment includes the following process S20 to the following steps.
  • Step S20 The UE in the Idle or connected state may determine that it is a Victim UE based on its own measurement and broadcast information from the base station.
  • the Victim UE receives the physical random access channel information available to the Victim UE sent by the base station through the system broadcast message.
  • the physical random access channel information available to the Victim UE may optionally be carried in SIB2 (SystemInformationBlock2), the information indicating one or more physical random access channels available to the Victim UE.
  • SIB2 SystemInformationBlock2
  • the information may independently indicate one or more physical random access channels available to the Victim UE, and may also indicate one or more physics available to the Victim UE along with physical random access channel information available to all or normal UEs. Random access channel.
  • the information may be an index of a physical random access channel configuration available to the Victim UE, and each index corresponds to a configuration of a set of physical random access channels.
  • the UE can know the physical random access channel available to the Victim UE configured by the base station through the configuration table.
  • the information may indicate a subset of the physical random access channels available to all UEs, or indicate whether the Victim UE can use the physical random access channel available to all UEs (or whether the Victim UE can use any of the Whether the physical random access channel, or whether the Victim UE uses the physical random access channel is restricted, or indirectly indicates whether the physical random access channel restriction mechanism or the random access response protection mechanism for the Victim UE is turned on.
  • the base station optionally also indicates a random access sequence (set) available to the Victim UE.
  • Step S40 The Victim UE knows one or more physical random access channels available to the Victim UE by receiving the physical random access channel information available to the Victim UE, and when there are multiple available physical random access channels, the UE One of the physical random access channels is selected to transmit a random access code. If the base station indicates the set of random access sequences available to the Victim UE, the UE needs to transmit a random access sequence belonging to the set.
  • the base station After receiving the random access code on the physical random access channel available to the Victim UE (possibly the random access code available to the Victim UE), the base station is in the protected subframe (the subframe is in the random access response window) Sending downlink control information (DCI) for scheduling a random access response, where the DCI is calculated according to a time-frequency resource of the physical random access channel.
  • DCI downlink control information
  • the RA-RNTI to the CRC scrambles.
  • the base station can simultaneously send a random access response on the protected subframe.
  • the random access response is included in the MAC PDU, and the random access response of the base station for the multiple random access codes received on the same physical random access channel may be included in one MAC PDU.
  • Step S60 The Victim UE attempts to decompose the common search space of the downlink subframe by using the RA-RNTI calculated according to the time-frequency resource of the physical random access channel selected by the Victim UE in the random access response window. If the interpretation is successful, the UE reads the scheduling information in the DCI, and receives the MAC PDU including 0 to n random access responses according to the scheduling information.
  • the Victim UE receives the downlink control information corresponding to the RA-RNTI calculated by the base station in the protected subframe; if the base station is on the protected subframe The random access response is transmitted, and the Victim UE also receives the corresponding MAC PDU including 0 to n random access responses on the protected subframe.
  • the UE compares the RAPID in the PDU header with the index of the random access code (ie, the random access sequence) used by the PDU. If the RAPID has the same index as the random access code used by the UE, the UE reads the corresponding random access response.
  • a message 3 (message3) to the base station according to the uplink grant (UL-GRANT).
  • UL-GRANT uplink grant
  • legacy UEs e.g., R8/R9/10 UEs
  • these UEs transmit random access codes using a physical random access channel that is common or available to all UEs. If the physical random access channel selected by the legacy UE is exactly the physical random access channel available to the Victim UE, and the base station does not indicate the random access code unique to the Victim UE, the base station cannot distinguish the contention of the random access code is Victim.
  • the UE is also sent by the legacy UE, so the random access response for these legacy UEs also uses the same transmission method as the Victim UE.
  • the random access response of the legacy UE and the Victim UE may be included in one MAC PDU and scheduled by one DCI.
  • the base station also transmits the DCI corresponding to the RA-RNTI of the legacy UEs in the protected subframe, and can also send the RAR of the legacy UE in the protected subframe. If the physical random access channel selected by the legacy UE is not a physical random access channel available to the Victim UE, the base station does not need to transmit the DCI and/or RAR in the protected subframe.
  • non-Vitim UEs R11 or later
  • these UEs may follow the random access method of the legacy UE; or adopt the following method.
  • the physical random access channel used by the non-Victim UE is a physical random access channel available to all UEs and is not a physical random access channel available to the Victim UE.
  • the Victim UE and the non-Victim UE use different physical random access channels.
  • different physical random access channels can also distinguish between Victim and non-Victim UEs.
  • the base station may further require that the random access sequence used by the non-Victim UE is different from the random access sequence used by the Victim UE, that is, the Victim UE and the non-Victim UE may also be distinguished by different random access sequences used by them.
  • the base station can distinguish the Victim UE and the non-Victim UE by a physical random access channel (or its time-frequency resource) and/or a random access code.
  • the base station can send a random access response to the Victim UE in the protected subframe and DCI; random access response and its DCI sent to non-Victim UEs in other subframes or suitable subframes (suitable for delay and scheduling decisions).
  • the base station may enable the UE to initiate a random access procedure by using a PDCCH order (instruction).
  • the base station uses a specific DCI format ( DCI format 1A) informs the UE to initiate a random access procedure.
  • the method includes the following process S100 and step S300.
  • Step S100 The UE in the connected state receives the specific DCI sent by the base station, and the DCI requires the UE to perform a random access procedure and instruct the UE to initiate a physical random access channel and a random access sequence that should be used for random access.
  • the physical random access channel that the base station indicates that the UE initiates random access is a physical random access access channel available to the Victim UE. That is, the base station indicates, by using downlink control information (independent), one physical random access channel available to the Victim UE. The UE transmits the designated random access code using a physical random access channel. After receiving the random access code on the indicated physical random access channel, the base station sends downlink control information for scheduling the random access response in the protected subframe (the subframe is in the random access response window) ( DCI), the DCI performs CRC scrambling using the RA-RNTI calculated from the time-frequency resources of the physical random access channel. The base station can simultaneously send a random access response on the protected subframe.
  • DCI downlink control information for scheduling the random access response in the protected subframe (the subframe is in the random access response window)
  • DCI performs CRC scrambling using the RA-RNTI calculated from the time-frequency resources of the physical random access channel.
  • the base station can simultaneously send a
  • the random access response is included in the MAC PDU, and the random access response of the base station for the multiple random access codes received on the same physical random access channel may be included in one MAC PDU.
  • Step S300 The Victim UE attempts to decompose the common search space of the downlink subframe by using the RA-RNTI calculated according to the time-frequency resource of the physical random access channel in the random access response window. If the interpretation is successful, the UE reads the DCI. Scheduling information, and receiving MAC PDUs including 0 to n random access responses according to the scheduling information.
  • the Victim UE receives the downlink control information corresponding to the RA-RNTI calculated by the base station in the protected subframe; if the base station is on the protected subframe The random access response is transmitted, and the Victim UE also receives the corresponding MAC PDU including 0 to n random access responses on the protected subframe.
  • the UE compares the RAPID in the PDU header with the index of the random access code (ie, the random access sequence) used by the PDU. If the RAPID has the same index as the random access code used by the UE, the UE reads the corresponding random access response. And continue to perform subsequent operations according to the random access response.
  • FIG. 10 is a third flowchart of a random access method according to a preferred embodiment of the present invention.
  • the method includes steps S1002 and S1012. .
  • Step S1002 The target base station sends a handover command message to the source base station.
  • Step S1004 The source base station sends an RRC connection reconfiguration message to the UE, where the physical random access channel information available to the Victim UE is carried.
  • Step S1006 The Victim UE sends a random access code to the target base station by using the physical random access channel indicated by the above information.
  • Step S1008 The target base station sends downlink control information for scheduling a random access response on the protected subframe.
  • Step S1010 The target base station sends a random access response on the protected subframe.
  • Step S1012 The UE sends an RRC connection reconfiguration complete message to the target base station.
  • Preferred Embodiment 7 This embodiment provides a random access method, and the method includes the following steps: Step S1102: During the handover process, the source base station and the target base station may perform a handover preparation process through the X2 or S1 interface. Then, the target base station sends a handover command message to the source base station, and the message may be transparently carried in the X2 or S1 message (the S1 message is also forwarded by the MME).
  • the handover command message includes a complete DL-DCCH message (the DL-DCCH message is sent by the source base station to the UE), and includes an RRC connection reconfiguration message, where the message includes physical random access channel information available to the Victim UE. Information can be placed in the RACH-ConfigDedicated IE).
  • the UE transmits the designated random access code to the target base station using the indicated physical random access channel.
  • Step 1104 After receiving the random access code on the indicated physical random access channel, the target base station sends, in the protected subframe (the subframe is in the random access response window), the scheduled random access response.
  • DCI Downlink Control Information
  • the target base station can simultaneously send a random access response on the protected subframe.
  • the random access response is included in the MAC PDU, and the random access response of the target base station for the plurality of random access codes received on the same physical random access channel may be included in one MAC PDU.
  • Step S1106 The Victim UE attempts to decompose the common search space of the downlink subframe by using the RA-RNTI calculated according to the time-frequency resource of the physical random access channel in the random access response window. If the interpretation is successful, the UE reads the DCI. Scheduling information, and receiving MAC PDUs including 0 to n random access responses according to the scheduling information.
  • the Victim UE receives the downlink control information corresponding to the RA-RNTI calculated by the target base station; if the target base station is in the protected sub-frame The random access response is transmitted on the frame, and the Victim UE also receives the corresponding 0 on the protected subframe.
  • n random access response MAC PDUs Up to n random access response MAC PDUs. The UE compares the RAPID in the PDU header with the index of the random access code (ie, the random access sequence) used by the PDU. If the RAPID has the same index as the random access code used by the UE, the UE reads the corresponding random access response.
  • a random access method and apparatus where the UE sends information for indicating a predetermined physical random access channel, where the random access carried on the predetermined physical random access channel is obtained by the UE.
  • the random access response corresponding to the sequence is sent on the protected subframe, and then the UE performs random access on the information indicating the predetermined physical random access channel, so that the resources for the random access by the UE are correspondingly restricted.
  • a random access may be performed according to a physical random access channel (ie, a restricted physical random access channel) sent by the base station to indicate a predetermined random access sequence, and the random access response corresponding to the UE random access sequence is protected.
  • a physical random access channel ie, a restricted physical random access channel
  • the transmission on the subframe overcomes the problem that the UE randomly times out or fails due to the random access resource limitation in the related art, and the probability of random access is improved.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

本发明公开了随机接入方法及装置，其中一种方法包括：UE获取基站发送的用于指示预定的物理随机接入信道的信息，其中，预定的物理随机接入信道上承载的随机接入序列对应的随机接入响应在受保护的子帧上进行发送；UE在信息指示预定的物理随机接入信道上进行随机接入。通过本发明，提高了随机接入的效率。

Description

随机接入方法及装置 技术领域 本发明涉及通信领域， 具体而言， 涉及随机接入方法及装置。 背景技术 在无线蜂窝通信系统中， 基站是为用户设备 （User Equipment, 简称为 UE) 提供 无线接入的设备， 一个基站可能包括一个或多个服务小区。 小区能够为一定地理范围 的 UE提供通信服务， 不同的小区可能有不同的覆盖范围， 通常可以根据小区的覆盖 范围以及部署的目的将小区分成宏小区 （macro cell), 微小区 （pico cell), 微微小区 (femto cell), 相应地， 提供这些小区的基站又可称为宏基站、 微基站、 家庭基站（微 微基站）。 小区还可以有不同的接入模式（access mode):通常一个普通的小区可以为任何用 户提供接入服务， 这种小区称为开放小区； 而针对在家庭或企业等应用环境下需要限 定允许接入的用户的需求， 一个封闭用户组 （Closed Subscriber Group, 缩写为 CSG) 小区或称为封闭型 （Closed) 小区只能允许规定的用户 （即成员） 接入； 或者一个混 合型 （hybrid) 小区在优先为成员用户提供接入的同时， 也可以为非成员用户提供接 入服务。 通常， 封闭型小区或混合型小区是家庭基站的一个典型特征， 虽然在某些情 况下其它类型的基站 （例如宏基站） 也可能配置封闭型或混合型小区。 一个无线接入网络可能包括多种类型的小区， 即宏小区， 微小区， 微微小区， 这 样的无线接入网络可以称为异构网络 （Heterogeneous network, 简称为为 Hetnet)。 当 不同类型的小区同频部署时， 在两个小区的交界区域或者说覆盖的边缘区域可能存在 比较大的干扰。 为了解决相邻小区间的干扰问题， 相关技术提出了几乎为空子帧 (Almost Blank Subframe, 简称为 ABS) 技术。 具体来说， 相邻小区产生干扰的小区 将预定的下行子帧配置成 ABS子帧， 在 ABS子帧中， 产生干扰的小区将减少下行传 输或者以较低的功率下行传输。 另外， 相邻小区产生干扰的小区将预定的下行子帧配置为多媒体广播组播业务单 频网络 (Multimedia Broadcast multicast service Single Frequency Network子巾贞， 简称为 MBSFN)子帧， 产生干扰的小区将只发送 2至 3个符号的下行控制区域， 而在剩余的 符号中不进行下行传输）。 这样， 通过上述两种方式， 在与过激小区的 ABS子帧（或 MBSFN子帧）相应的 受害小区的对应子帧 （可称为受保护的子帧） 上， 受害小区的下行传输就不会受到很 大的干扰， 可以保护受害小区在这些子帧上的下行传输。 但是， 在移动通信系统中， UE进行随机接入的上行资源与下行资源是对应的， 由 于处于小区的覆盖区域或边缘区域的 UE用于传输的下行资源受到了限制， 那么该小 区进行随机接入的资源相应受到了限制， 而如果 UE不按照限制的随机接入资源进行 随机接入或者不知道随机接入资源的限制， 导致用户随机接入超时或失败。 发明内容 本发明实施例提供了随机接入方法及装置， 以至少解决上述问题。 根据本发明实施例的一个方面， 提供了一种随机接入方法， 包括： 用户设备 UE 获取基站发送的用于指示预定的物理随机接入信道的信息， 其中， 所述预定的物理随 机接入信道上承载的随机接入序列对应的随机接入响应在受保护的子帧上进行发送。 优选地，所述 UE在所述信息指示预定的物理随机接入信道上进行随机接入包括： 所述 UE在所述指示的预定的物理随机接入信道上发送随机接入序列； 所述 UE接收 所述基站对所述随机接入序列进行响应的随机接入响应。 优选地， 所述受保护的子帧包括： 与相邻小区的几乎为空子帧 （ABS) 对应的子 帧或者与相邻小区的 MBSFN子帧对应的子帧。 优选地， 所述预定的物理随机接入信道是系统可用的物理随机接入信道集合的一 个子集。 优选地， 所述预定的物理随机接入信道的指示信息与系统可用的物理随机接入信 道的指示信息联合指示所述预定的物理随机接入信道， 其中， 所述系统可用的物理随 机接入信道的指示信息用于指示所述系统可用的物理随机接入信道集合。 优选地， 所述在预定的物理随机接入信道上发送的随机接入序列与在所述系统可 用的物理随机接入信道上发送的随机接入序列不同。 根据本发明实施例的再一方面， 提供了一种随机接入方法， 包括： 基站确定预定 的物理随机接入信道， 其中， 所述预定的物理随机接入信道上承载的随机接入序列对 应的随机接入响应在受保护的子帧上进行发送； 所述基站将所述预定的物理随机接入 信道的信息发送给 UE。 优选地， 在所述基站将所述预定的物理随机接入信道的信息发送给用户设备 UE 之后， 还包括： 所述基站在所述预定的物理随机接入信道上接收所述 UE发送的随机 接入序列； 所述基站在所述受保护的子帧上发送对应于所述随机接入序列的随机接入 响应。 优选地， 所述受保护的子帧包括： 与相邻小区的几乎为空子帧 （ABS) 对应的子 帧或者与相邻小区的 MBSFN子帧对应的子帧。 优选地， 所述基站通过以下方式之一或其任意组合将所述预定的物理随机接入信 道的信息发送给所述 UE: 系统消息、 无线资源控制 RRC连接重配消息、 下行控制信 息。 优选地， 所述 RRC连接重配消息通过所述 UE的服务基站透明传输。 优选地， 所述基站包括： 宏基站、 微基站或家庭基站。 根据本发明实施例的另一方面， 提供了一种随机接入装置， 应用于 UE， 包括： 获 取模块， 设置为获取基站发送的用于指示预定的物理随机接入信道的信息， 其中， 所 述预定的物理随机接入信道上承载的随机接入序列对应的随机接入响应在受保护的子 帧上进行发送； 随机接入模块， 设置为在所述信息指示预定的物理随机接入信道上进 行随机接入。 优选地， 所述随机接入模块包括： 第一发送模块， 设置为在所述指示的预定的物 理随机接入信道发送随机接入序列； 第一接收模块， 设置为接收所述基站对所述随机 接入序列进行响应的随机接入响应。 根据本发明实施例的又一方面， 提供了一种随机接入装置， 应用于基站， 包括： 第二确定模块， 设置为确定预定的物理随机接入信道， 其中， 所述预定的物理随机接 入信道上承载的随机接入序列对应的随机接入响应在受保护的子帧上进行发送； 第二 发送模块， 设置为将所述预定的物理随机接入信道的信息发送给 UE。 优选地， 上述装置还包括： 第二接收模块， 设置为在所述预定的物理随机接入信 道上接收所述 UE发送的随机接入序列； 第三发送模块， 设置为在所述受保护的子帧 上发送对应于所述随机接入序列的随机接入响应。 通过本发明，采用 UE获取基站发送的用于指示预定的物理随机接入信道的信息， 其中， 预定的物理随机接入信道上承载的随机接入序列对应的随机接入响应在受保护 的子帧上进行发送，然后 UE在该信息指示预定的物理随机接入信道上进行随机接入， 使得 UE进行随机接入的资源相应受到了限制的时候， 可以根据基站指示预定的物理 随机接入信道 （即受限制的物理随机接入信道） 进行随机接入， 该类 UE随机接入序 列对应的随机接入响应在受保护的子帧上发送， 解决了相关技术中 UE由于随机接入 资源受限导致用户随机接入超时或失败的问题， 提高了随机接入的概率。 附图说明 此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部分， 本发 明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的不当限定。 在附图 中： 图 1是根据相关技术的异构网络的覆盖示意图； 图 2是根据本发明实施例的随机接入方法的第一流程图； 图 3是根据本发明实施例的随机接入方法的第二流程图； 图 4是根据本发明实施例的随机接入装置的第一结构框图； 图 5是根据本发明实施例的随机接入装置的优选的第一结构框图； 图 6是根据本发明实施例的随机接入装置的第二结构框图； 图 7是根据本发明实施例的随机接入装置的优选的第二结构框图； 图 8是根据本发明优选实施例的随机接入方法的第一流程图； 图 9是根据本发明优选实施例的随机接入方法的第二流程图； 以及 图 10是根据本发明优选实施例的随机接入方法的第三流程图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是， 在不冲突的 情况下， 本申请中的实施例及实施例中的特征可以相互组合。 本实施例提供了一种随机接入方法， 图 2是根据本发明实施例的随机接入方法的 第一流程图， 如图 2所示， 该流程包括如下的步骤 S202至步骤 S204。 步骤 S202: UE获取基站发送的用于指示预定的物理随机接入信道的信息， 其中， 预定的物理随机接入信道上承载的随机接入序列对应的随机接入响应在受保护的子帧 上进行发送。 步骤 S204: UE在该信息指示预定的物理随机接入信道上进行随机接入。 通过上述步骤， UE获取基站发送的用于指示预定的物理随机接入信道的信息，其 中， 预定的物理随机接入信道上承载的随机接入序列对应的随机接入响应在受保护的 子帧上进行发送， 然后， UE在该信息指示预定的物理随机接入信道上进行随机接入， 使得 UE进行随机接入的资源相应受到了限制的时候， 可以根据基站指示预定的物理 随机接入信道 （即受限制的物理随机接入信道） 进行随机接入， 该类 UE随机接入序 列对应的随机接入响应在受保护的子帧上发送， 克服了相关技术中 UE由于随机接入 资源受限导致用户随机接入超时或失败的问题， 提高了随机接入的概率。 作为一个较优的实施方式， UE可以通过以下方式实现随机接入： UE在指示的预 定的物理随机接入信道上发送随机接入序列; UE接收基站对随机接入序列进行响应的 随机接入响应。这样， UE与基站完成了随机接入的信令交互， 提高了随机接入的可靠 性。 作为另一个较优的实施方式，步骤 S202中的受保护的子帧包括以下之一： 与相邻 小区的几乎为空子帧（ABS)对应的子帧或者与相邻小区的 MBSFN子帧对应的子帧。 例如： 将受保护的子帧设置为为 ABS对应的子帧， 在相关技术中， ABS子帧中将减 少下行传输或者以较低的功率下行传输， 这样对应于 ABS的子帧受到 ABS子帧传输 信道的干扰将会大大降低， 从而提高了传输的准确性； 在 MBSFN子帧的应用中， 产 生干扰的小区将只发送 2至 3个符号的下行控制区域， 而在剩余的符号中不进行下行 传输。 这样， 在与 MBSFN子帧相应的受害小区的对应子帧 （受保护的子帧） 上受到 的干扰大大降低， 从而提高了传输的准确性。 优选地， 该预定的物理随机接入信道是系统可用的物理随机接入信道集合的一个 子集。 在实施时， 可以通过多种方式将用于承载该 UE的物理随机接入信道指示给 UE， 可以通过直接或者间接的方式指示。 通过直接的方式进行指示： 例如直接将该物理随 机接入信道的资源位置通知 UE，这种方式信令传送的信息量会比较大。通过间接的方 式进行指示： 例如： 可以通过预定的物理随机接入信道的指示信息与系统可用的物理 随机接入信道的指示信息联合指示预定的物理随机接入信道， 其中， 该系统可用的物 理随机接入信道的指示信息用于指示系统可用的物理随机接入信道集合， 比较优的， 可以只传送用于承载 UE进行随机接入的物理随机接入信道在所有随机接入信道中的 索引值即可， 使得这种方式信令传送的信息量比较小。 优选地， 该预定的物理随机接入信道上发送的随机接入码与系统可用的物理随机 接入信道上发送的的随机接入码不同。 在随机接入过程中， 每个用户进行随机接入的 随机接入码都不相同， 通过该预定的物理随机接入信道上发送的随机接入码与系统可 用的物理随机接入信道上发送的的随机接入码进行区分， 间接实现了用户区分， 使得 基站通过判断收到随机接入码就可判断该 UE使用的随机接入信道 （是否是预定的随 机接入信道还是系统可用的物理随机接入信道）。 本实施例提供了一种随机接入方法， 图 3是根据本发明实施例的随机接入方法的 第一流程图， 如图 3所示， 该流程包括如下的步骤 S302和步骤 S304。 步骤 S302: 确定预定的物理随机接入信道， 其中， 预定的物理随机接入信道上承 载的随机接入序列对应的随机接入响应在受保护的子帧上进行发送。 步骤 S304: 基站将预定的物理随机接入信道的信息发送给 UE。 通过上述步骤， 基站确定确定预定的物理随机接入信道， 其中， 预定的物理随机 接入信道上承载的随机接入序列对应的随机接入响应在受保护的子帧上进行发送， 基 站将预定的物理随机接入信道的信息发送给 UE，使得 UE进行随机接入的资源相应受 到了限制的时候， 可以根据基站指示预定的物理随机接入信道 （即受限制的物理随机 接入信道） 进行随机接入， 该类 UE随机接入序列对应的随机接入响应在受保护的子 帧上发送， 克服了相关技术中 UE由于随机接入资源受限导致用户随机接入超时或失 败的问题， 提高了随机接入的概率。 作为一个较优的实施方式， 在步骤 S304之后， 还包括： 基站在预定的物理随机接 入信道上接收 UE发送的随机接入序列； 基站在受保护的子帧上发送对应于随机接入 序列的随机接入响应。 在相关技术中， 相关技术中采用将预定下行子帧配置成几乎为 空子帧 （Almost Blank Subframe, 简称为 ABS )， 这样受到干扰的小区在 ABS对应的 子帧上的下行接收功率比较好， 该优选实施方式在该类子帧上发送随机接入响应， 降 低了基站发送随机接入响应的干扰， 相应地提高了 UE接收随机接入响应的准确率。 作为另一个较优的实施方式，步骤 S302中的受保护的子帧包括以下之一： 与相邻 小区的几乎为空子帧 ABS对应的子帧或者与相邻小区的 MBSFN子帧对应的子帧。例 如： 将受保护的子帧设置为 ABS对应的子帧， 在相关技术中， ABS子帧中将减少下 行传输或者以较低的功率下行传输， 这样对应于 ABS的子帧受到 ABS子帧传输信道 的干扰将会大大降低， 从而提高了传输的准确性； 由于在 MBSFN应用中， 产生干扰 的小区将只发送 2至 3个符号的下行控制区域， 而在剩余的符号中不进行下行传输）。 这样， 在与 MBSFN子帧相应的受害小区的对应子帧 （受保护的子帧） 上受到的干扰 大大降低， 从而提高了传输的准确性。 优选地， 基站通过以下方式之一或其任意组合将物理随机接入信道的信息发送给
UE: 系统消息、 无线资源控制 （RRC) 连接重配消息、 下行控制消息。 对应于 UE处 于不同的状态， 或者根据系统的需要， 基站可以采用上述多种方式向 UE发送该信息， 例如： UE处于空闲态的时候， 可以通过系统消息， 例如广播方式； UE处于连接态的 时候， 基站可以通过系统消息或 RRC连接重配消息。 比较优的， RRC连接重配消息 通过 UE的服务基站透明传输。 优选地， 基站包括： 宏基站、 微基站或家庭基站。 对于异构网络中的宏基站、 微 基站或家庭基站都可以采用上述的随机接入方法进行接入，提高了该方法的适用范围。 在另外一个实施例中， 还提供了两种随机接入软件， 该软件用于执行上述实施例 及优选实施例中描述的技术方案。 在另外一个实施例中， 还提供了一种存储介质， 该存储介质中存储有上述随机接 入软件， 该存储介质包括但不限于： 光盘、 软盘、 硬盘、 可擦写存储器等。 本发明实施例还提供了两种随机接入装置， 该随机接入装置可以用于实现上述随 机接入方法及优选实施方式， 已经进行过说明的， 不再赘述， 下面对该随机接入装置 中涉及到的模块进行说明。 如以下所使用的， 术语"模块"可以实现预定功能的软件和 / 或硬件的组合。尽管以下实施例所描述的系统和方法较佳地以软件来实现，但是硬件， 或者软件和硬件的组合的实现也是可能并被构想的。 图 4 是根据本发明实施例的随机接入装置的第一结构框图， 该装置可以应用于 UE, 如图 4所示， 该装置包括： 获取模块 42和随机接入模块 44， 下面对上述结构进 行详细描述： 获取模块 42， 设置为获取基站发送的用于指示预定的物理随机接入信道的信息， 其中， 预定的物理随机接入信道上承载的随机接入序列对应的随机接入响应在受保护 的子帧上进行发送； 随机接入模块 44， 连接至获取模块 42， 设置为在获取模块 42获 取到的信息指示的预定的物理随机接入信道上进行随机接入。 图 5是根据本发明实施例的随机接入装置的优选的第一结构框图， 如图 5所示， 随机接入模块 44包括： 第一发送模块 442、 第一接收模块 444， 下面对上述结构进行 详细描述： 第一发送模块 442， 设置为在指示的预定的物理随机接入信道发送随机接入序列； 第一接收模块 444， 连接至第一发送模块 442， 设置为接收基站对第一发送模块 442 发送的随机接入消息进行响应的随机接入响应。 图 6是根据本发明实施例的随机接入装置的第二结构框图， 该装置可以应用于基 站， 该装置包括： 第二确定模块 62和第二发送模块 64， 下面对上述结构进行详细描 述： 第二确定模块 62， 设置为确定预定的物理随机接入信道， 其中， 预定的物理随机 接入信道上承载的随机接入序列对应的随机接入响应在受保护的子帧上进行发送； 第 二发送模块 64， 连接至第二确定模块 62， 设置为将第二确定模块 62确定的预定的物 理随机接入信道的信息发送给 UE。 图 7是根据本发明实施例的随机接入装置的优选的第二结构框图， 如图 7所示， 该装置还包括： 第二接收模块 72和第三发送模块 74， 下面对上述结构进行详细描述: 第二接收模块 72， 用于在预定的物理随机接入信道上接收 UE发送的随机接入序 列； 第三发送模块 74，连接至第二确定模块 72，用于在受保护的子帧上发送对应于第 二接收模块接收到的随机接入序列的随机接入响应。 下面将结合优选实施例进行说明， 以下优选实施例结合了上述实施例及优选实施 方式。 以下实施例是基于图 1的架构进行说明的。 在图 1中， 异构网络中包括多种类型 的小区， 例如宏小区、 微小区， 微微小区， 在不同类型的小区同频部署时， 在两个小 区的交界区域或者覆盖的边缘区域可能会存在比较大的干扰， 对于发生干扰的两个小 区来说， 对相邻小区产生干扰的小区为过激小区 （aggressor cell), 处于异构网络中不 同类型的小区的重叠区域或边缘区域或受到比较大的干扰， 可以将这些小区称为受害 小区 （Victim UE), 将处于受害小区的 UE 称为受害 UE (Victim UE)。 例如： 在 macro-femto共存的场景下，如果一个 UE在 CSG Femto小区覆盖范围内而又不能接入 该 CSG小区， 则该 macro UE (MUE) 受到 femto的强干扰， 即为 Victim UE; 或者， 在 macro-femto场景下，如果一个 UE在 pico的覆盖范围增大 (coverage range extension, 缩写为 CRE)范围内， 则该 pico UE (PUE)受到 macro的强干扰， 该小区即为 Victim 小区。 可以采用过激小区将预定下行子帧配置成几乎为空子帧 （Almost Blank Subframe, 简称为 ABS)， 在 ABS子帧中， 过激小区将减少下行传输或者以比较低的 功率下行传输。 另外， 相邻小区产生干扰的小区将预定的下行子帧配置为多媒体广播组播业务单 频网络 (Multimedia Broadcast multicast service Single Frequency Network子巾贞， 简称为 MBSFN)子帧， 产生干扰的小区将只发送 2至 3个符号的下行控制区域， 而在剩余的 符号中不进行下行传输）。 这样， 通过上述两种方式， 在与过激小区的 ABS子帧（或 MBSFN子帧）相应的 受害小区的对应子帧 （可称为受保护的子帧） 上， 受害小区的下行传输就不会受到很 大的干扰， 可以保护受害小区在这些子帧上的下行传输。 但是， 在移动通信系统中， UE进行随机接入的上行资源与下行资源是对应的， 由 于受害小区用于传输的下行资源受到了限制， 那么受害小区进行随机接入的资源相应 受到了限制， 导致用户随机接入超时或失败。 以下实施例中， 受害小区接收基站发送 对受害小区可用的物理随机接入信号信息， 进行随机接入。 另外， UE是通过随机接入过程接入到服务小区的， 在随机接入过程中， UE向所 选择的小区发送随机接入码， 随机接入码是在特定的物理随机接入信道上发送的。 基 站可能配置不同密度的物理随机接入信道， 不同的物理随机接入信道可以通过不同的 时频资源区分， 具体来说， FDD系统不同的物理随机接入信道通过不同的子帧（即时 间资源） 区分， TDD系统不同的物理随机接入信道通过时频资源共同区分。 基站在物 理随机接入信道上接收到随机接入码后， 会在随机接入响应窗内向 UE发送随机接入 响应，该随机接入响应是通过下行控制信道（PDCCH)的公共搜索空间（common search space) 上的下行控制信息 （DCI) 调度的。 每一个子帧的公共搜索空间最多只能容纳 4 条下行控制信息， 而在随机接入中每一个随机接入响应都对应在一个物理随机接入 信道上接收的 （一条或多条） 随机接入码， 因此在 1个受保护的子帧中最多响应在 4 个物理随机接入信道上接收到的随机接入码。 实际上， 由于公共搜索空间还需要承载 用于调度系统消息以及寻呼消息的下行控制信息， 因此， 在 1个受保护的子帧上能够 响应的物理随机接入信道数可能是 n个 （n<=4)。 而如果基站配置的物理随机接入信 道的密度过大， 例如大于 4/10 (即每 10个子帧中有 4个物理随机接入信道）， 则导致 UE 发送随机接入码后基站可能无法在受保护的子帧发送相应地随机接入响应， 导致 UE无法正确接收随机接入响应而导致接入失败，在以下实施例中，基站在受保护的子 帧上发送随机接入响应。 优选实施例一 本实施例提供了一种随机接入方法， 该随机接入方法包括如下步骤： 本发明提出 一种随机接入方法， 其特征包括： 步骤 S2: Victim UE接收基站发送的对 Victim UE可用的物理随机接入信道信息； 步骤 S4: Victim UE使用该信息指示的物理随机接入信道发送随机接入码。 作为一个较优的实施方式，在步骤 S4之后，该基站在受保护的子帧上发送用于调 度随机接入响应的下行控制信息， 该方式在受保护的子帧上发送下行控制信息， 使得 发送的信号避开了过激小区在该子帧的干扰， 保证了下行控制信息的接收准确率。 优选地， 该基站发送的是用于调度随机接入响应的下行控制信息， 所以承载该下 行控制信息的受保护子帧在随机接入响应窗内。保证了随机接入响应被接收的准确率。 作为另一个较优的实施方式， 该进一步地， 基站在受保护的子帧上发送随机接入 响应；， 该方式在受保护的子帧上发送随机接入响应， 使得发送的随机接入响应避开了 过激小区在该子帧的干扰， 保证了随机接入响应被接收的准确率。 在实施时， 步骤 S2可以采用如下多种方式实现该 Victim UE接收基站发送的对 Victim UE可用的物理随机接入信道信息的方法， 例如： 该 Victim UE接收基站通过系 统消息和 /或 RRC连接重配消息和 /或下行控制信息发送该 Victim UE可用的物理随机 接入信道信息。 优选地， 该 RRC连接重配消息通过 Victim UE的服务基站透明传送； 作为再一个较优的实施方式， 非 Victim UE (移动通信系统中除了 Victim UE之外 的 UE) 接收基站发送的对所有 UE可用的物理随机接入信道信息， 该方式保证了除 Victim UE之外的其他 UE通过现有技术中的方式进行接入，减少了对现有系统随机接 入的改变， 提高了系统兼容性。 优选地， 非 Victim UE使用该对所有 UE可用的物理随机接入信道信息所指示的 物理随机接入信道发送随机接入码； 或者， 非 Victim UE用于发送随机接入码的物理 随机接入信道是所有 UE可用的物理随机接入信道并且不是 Victim UE可用的物理随 机接入信道； 作为又一个较优的实施方式， 该 Victim UE可用的物理随机接入信道是所有 UE 可用的物理随机接入信道的一个子集， 优选地， 该 Victim UE可用的物理随机接入信 道信息指示 Victim UE可用的物理随机接入信号是所有 UE可用的物理随机接入信道 的一个子集； 作为一种节省信令负荷的方式， 比较优的， 该 Victim UE可用的物理随 机接入信道信息包括所有 UE可用的物理随机接入信道信息和指示信息， 该指示信息 与所有 UE可用的物理随机接入信道信息联合指示 Victim UE可用的物理随机接入信 道。 作为再一个较优的实施方式， Victim UE接收基站发送的 Victim UE可用的随机接 入码信息， 该 Victim UE使用该 Victim UE可用的物理随机接入信道发送该 Victim UE 可用的随机接入码； 该物理随机接入信道信息指示了一个或多个物理随机接入信道所 占用的时域和 /或频域资源。 需要说明的是， 该实施例中的基站可以包括微基站和宏基站。 该方式扩大了该随 机接入方式的适用范围。 优选实施例二 本实施例提供了一种随机接入方法， 图 8是根据本发明优选实施例的随机接入方 法的第一流程图， 如图 8所示， 该方法的流程包括如下的步骤 S802和步骤 S804。 步骤 S802: Victim UE接收基站发送的对 Victim UE可用的物理随机接入信道信 息。 步骤 S804: Victim UE使用该信息的指示的物理随机接入信道发送随机接入码。 优选实施例三 本实施例提供了一种随机接入方法， 图 9是根据本发明优选实施例的随机接入方 法的第二流程图， 如图 9所示， 该方法的流程包括 S902和步骤 910。 步骤 S902: Victim UE接收基站发送的对 Victim UE可用的物理随机接入信道信 息； 步骤 S904: Victim UE使用所述信息指示的物理随机接入信道发送随机接入码； 步骤 S906: 基站在受保护的子帧上发送用于调度随机接入响应的下行控制信息； 步骤 S908: 基站在受保护的子帧上发送随机接入响应； 步骤 S910: UE向基站发送消息 3 ; 基于此， 本发明提出了一种随机接入方法， 以使基站能够在受保护的子帧上发送 Victim UE的随机接入响应， 从而减少接入时延和失败概率。 优选实施例四 本实施例提供了一种随机接入方法， 本实施例的方法包括如下流程 S20 至步骤
S60。 步骤 S20: 处于 Idle或连接态的 UE可能基于自身的测量以及来自基站的广播信 息判断自己是一个 Victim UE。 例如： Victim UE通过系统广播消息接收基站发送的对 Victim UE可用的物理随机 接入信道信息。 具体的， Victim UE 可用的物理随机接入信道信息可以在 SIB2 ( SystemInformationBlock2 )中可选地携带， 该信息指示了对 Victim UE可用的一个或 多个物理随机接入信道。 优选地，该信息可以独立指示对 Victim UE可用的一个或多个物理随机接入信道， 也可以和所有或普通 UE可用的物理随机接入信道信息一起指示对 Victim UE可用的 一个或多个物理随机接入信道。 例如， 独立指示时， 该信息可以是 Victim UE可用的 物理随机接入信道配置的索引， 每一个索引对应一套物理随机接入信道的配置。 UE 接收到某一个索引值后即可通过配置表知道基站配置的 Victim UE可用的物理随机接 入信道。 联合指示时， 该信息可以指示所有的 UE可用的物理随机接入信道的一个子 集， 或者指示是否 Victim UE可以使用对所有 UE可用的物理随机接入信道 （或者说 Victim UE是否可以使用任意的物理随机接入信道，或者说 Victim UE使用物理随机接 入信道是否受到限制），或者间接指示对 Victim UE的物理随机接入信道限制机制或随 机接入响应保护机制是否开启。 此外， 基站还可选地指示 Victim UE可用的随机接入 序列 （集）。 步骤 S40: Victim UE通过接收基站发送的对 Victim UE可用的物理随机接入信道 信息知道一个或多个它自己可用的物理随机接入信道， 当有多个可用的物理随机接入 信道时， UE选择其中一个物理随机接入信道发送随机接入码。如果基站指示了 Victim UE可用的随机接入序列集， 在 UE需发送属于该集合的随机接入序列。基站在 Victim UE可用的物理随机接入信道上接收到随机接入码后（可能还是 Victim UE可用的随机 接入码） 则在受保护的子帧 （该子帧在随机接入响应窗口内） 上发送用于调度随机接 入响应的下行控制信息（DCI)， 该 DCI使用根据物理随机接入信道的时频资源计算得 到的 RA-RNTI进行 CRC加扰。 基站可以一并在受保护的子帧上发送随机接入响应。 随机接入响应包含在 MAC PDU中， 基站针对在同一个物理随机接入信道上收到的多 个随机接入码的随机接入响应可以包括在一个 MAC PDU中。 步骤 S60: Victim UE在随机接入响应窗口内使用根据它自己选择的物理随机接入 信道的时频资源计算得到的 RA-RNTI 尝试解下行子帧的公共搜索空间。 如果解读成 功， 则 UE读取 DCI中的调度信息， 并且按照调度信息接收包括 0至 n个随机接入响 应的 MAC PDU。 如果基站是在受保护的子帧上传输的下行控制信息， 则 Victim UE 即在受保护的子帧上接收到与其计算的 RA-RNTI对应的下行控制信息；如果基站在受 保护的子帧上传输了随机接入响应， 则 Victim UE也在受保护的子帧上接收相应的包 括 0至 n个随机接入响应的 MAC PDU。 UE将该 PDU头中的 RAPID与其使用的随机 接入码（即随机接入序列）的索引比较， 如果有 RAPID与其使用的随机接入码的索引 相同， 则 UE读取相应的随机接入响应， 并且根据随机接入响应继续执行后续操作， 例如根据上行授权 （UL-GRANT) 向基站发送消息 3 (message3 )。 为了实现系统兼容， 优选地， 对于 legacy UE (例如 R8/R9/10 UE), 这些 UE使用 通用的或者说所有 UE可用的物理随机接入信道发送随机接入码。如果 legacy UE选择 的物理随机接入信道正好是 Victim UE可用的物理随机接入信道，在基站未指示 Victim UE专有的随机接入码的情况下， 基站无法区分竞争的随机接入码是 Victim UE还是 legacy UE发的， 因此对于这些 legacy UE的随机接入响应也采用跟 Victim UE一样的 传输方法。 实际上， legacy UE和 Victim UE的随机接入响应可以被包括在一个 MAC PDU中，并且被一个 DCI调度。这样，基站也在受保护的子帧中发送与这些 legacy UE 的 RA-RNTI对应的 DCI，还可以在受保护的子帧中发送 legacy UE的 RAR。如果 legacy UE选择的物理随机接入信道不是 Victim UE可用的物理随机接入信道，则基站不需要 采用受保护的子帧发送 DCI和 /或 RAR。 为了实现系统兼容， 优选地， 对于 non Victim UE (R11或以后的版本）， 这些 UE 可以沿用 legacy UE的随机接入方法； 或者采用下面的方法。非 Victim UE使用的物理 随机接入信道是所有 UE可用的物理随机接入信道并且不是 Victim UE可用的物理随 机接入信道， 换句话说， Victim UE和非 Victim UE使用不同的物理随机接入信道， 并 且不同的物理随机接入信道也可以区分 Victim和非 Victim UE。 此外， 基站还可以进 一步要求非 Victim UE使用的随机接入序列和 Victim UE使用的随机接入序列不同， 即 Victim UE和非 Victim UE还可通过它们使用的不同的随机接入序列区分。 这样， 基站可以通过物理随机接入信道（或者说其时频资源）和 /或随机接入码区分 Victim UE 和非 Victim UE。这样， 基站可在受保护的子帧发送给 Victim UE的随机接入响应及其 DCI;在其它子帧或者合适的子帧（合适可以根据时延和调度决定）发送给非 Victim UE 的随机接入响应及其 DCI。 优选实施例五 本实施例提供了一种随机接入方法， 在本实施例中， 基站可以通过 PDCCH order (命令）让 UE发起随机接入流程， 这种情况下， 基站以特定的 DCI格式（DCI format 1A) 通知 UE发起随机接入流程。 该方法包括如下流程 S100和步骤 S300。 步骤 S100: 处于连接态的 UE接收到基站发送的特定的 DCI， 该 DCI要求 UE执 行随机接入过程并且指示 UE发起随机接入应使用的物理随机接入信道和随机接入序 列。对于 Victim UE, 基站指示 UE发起随机接入应使用的物理随机接入信道是 Victim UE可用的物理随机接入接入信道。 也就是说， 基站通过下行控制信息（独立）指示对 Victim UE可用的一个物理随机接入信道。 UE使用物理随机接入信道发送指定的随机 接入码。基站在指示的物理随机接入信道上接收到随机接入码后则在受保护的子帧 (该 子帧在随机接入响应窗口内） 上发送用于调度随机接入响应的下行控制信息 （DCI)， 该 DCI使用根据物理随机接入信道的时频资源计算得到的 RA-RNTI进行 CRC加扰。 基站可以一并在受保护的子帧上发送随机接入响应。 随机接入响应包含在 MAC PDU 中， 基站针对在同一个物理随机接入信道上收到的多个随机接入码的随机接入响应可 以包括在一个 MAC PDU中。 步骤 S300: Victim UE在随机接入响应窗口内使用根据物理随机接入信道的时频 资源计算得到的 RA-RNTI尝试解下行子帧的公共搜索空间， 如果解读成功， 则 UE读 取 DCI 中的调度信息， 并且按照调度信息接收包括 0至 n个随机接入响应的 MAC PDU。 如果基站是在受保护的子帧上传输的下行控制信息， 则 Victim UE即在受保护 的子帧上接收到与其计算的 RA-RNTI对应的下行控制信息；如果基站在受保护的子帧 上传输了随机接入响应， 则 Victim UE也在受保护的子帧上接收相应的包括 0至 n个 随机接入响应的 MAC PDU。 UE将该 PDU头中的 RAPID与其使用的随机接入码（即 随机接入序列） 的索引比较， 如果有 RAPID 与其使用的随机接入码的索引相同， 则 UE读取相应的随机接入响应， 并且根据随机接入响应继续执行后续操作。 优选实施例六 本实施例提供了一种随机接入方法，图 10是根据本发明优选实施例的随机接入方 法的第三流程图， 如图 10所示， 该方法包括步骤 S1002和步骤 S1012。 步骤 S1002: 目标基站向源基站发送切换命令消息。 步骤 S1004: 源基站向 UE发送 RRC连接重配消息， 其中携带 Victim UE可用的 物理随机接入信道信息。 步骤 S1006: Victim UE使用上述信息指示的物理随机接入信道向目标基站发送随 机接入码。 步骤 S1008: 目标基站在受保护的子帧上发送用于调度随机接入响应的下行控制 信息。 步骤 S1010: 目标基站在受保护的子帧上发送随机接入响应。 步骤 S1012: UE向目标基站发送 RRC连接重配完成消息。 优选实施例七 本实施例提供了一种随机接入方法， 该方法包括如下流程： 步骤 S1102: 在切换过程中， 源基站和目标基站可能通过 X2或 S1接口进行切换 准备流程， 如果准备成功， 则目标基站向源基站发送切换命令消息， 该消息可能透明 的承载在 X2或 S1消息中 （S1消息还通过 MME转发）。 切换命令消息中包括一个完 整的 DL-DCCH消息（该 DL-DCCH消息由源基站发给 UE)，其中包括 RRC连接重配 消息， 该消息中包括 Victim UE 可用的物理随机接入信道信息 （该信息可以被放在 RACH-ConfigDedicated IE中）。 UE使用指示的物理随机接入信道向目标基站发送指定 的随机接入码。 步骤 1104: 目标基站在指示的物理随机接入信道上接收到随机接入码后则在受保 护的子帧 （该子帧在随机接入响应窗口内） 上发送用于调度随机接入响应的下行控制 信息 （DCI)， 该 DCI使用根据物理随机接入信道的时频资源计算得到的 RA-RNTI进 行 CRC加扰。 目标基站可以一并在受保护的子帧上发送随机接入响应。随机接入响应 包含在 MAC PDU中， 目标基站针对在同一个物理随机接入信道上收到的多个随机接 入码的随机接入响应可以包括在一个 MAC PDU中。 步骤 S1106: Victim UE在随机接入响应窗口内使用根据物理随机接入信道的时频 资源计算得到的 RA-RNTI尝试解下行子帧的公共搜索空间， 如果解读成功， 则 UE读 取 DCI 中的调度信息， 并且按照调度信息接收包括 0至 n个随机接入响应的 MAC PDU。 如果目标基站是在受保护的子帧上传输的下行控制信息， 则 Victim UE即在受 保护的子帧上接收到与其计算的 RA-RNTI对应的下行控制信息；如果目标基站在受保 护的子帧上传输了随机接入响应，则 Victim UE也在受保护的子帧上接收相应的包括 0 至 n个随机接入响应的 MAC PDU。 UE将该 PDU头中的 RAPID与其使用的随机接入 码（即随机接入序列）的索引比较，如果有 RAPID与其使用的随机接入码的索引相同， 则 UE读取相应的随机接入响应， 并且根据随机接入响应继续执行后续操作， 包括发 送 RRC连接重配完成消息给目标基站。 通过上述实施例， 提供了一种随机接入方法及装置， 通过 UE获取基站发送的用 于指示预定的物理随机接入信道的信息， 其中， 预定的物理随机接入信道上承载的随 机接入序列对应的随机接入响应在受保护的子帧上进行发送，然后， UE在该信息指示 预定的物理随机接入信道上进行随机接入， 使得 UE进行随机接入的资源相应受到了 限制的时候， 可以根据基站发送的用于指示预定的物理随机接入信道 （即受限制的物 理随机接入信道） 进行随机接入， 该类 UE随机接入序列对应的随机接入响应在受保 护的子帧上发送， 克服了相关技术中 UE由于随机接入资源受限导致用户随机接入超 时或失败的问题， 提高了随机接入的概率。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布在多个计算装置所 组成的网络上， 可选地， 它们可以用计算装置可执行的程序代码来实现， 从而可以将 它们存储在存储装置中由计算装置来执行，或者将它们分别制作成各个集成电路模块， 或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样， 本发明不限 制于任何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领域的技 术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内， 所作的 任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种随机接入方法， 包括：
用户设备 UE获取基站发送的用于指示预定的物理随机接入信道的信息， 其中， 所述预定的物理随机接入信道上承载的随机接入序列对应的随机接入响 应在受保护的子帧上进行发送；
所述 UE在所述信息指示预定的物理随机接入信道上进行随机接入。
2. 根据权利要求 1所述的方法， 其中， 所述 UE在所述信息指示预定的物理随机 接入信道上进行随机接入包括：
所述 UE在所述指示的预定的物理随机接入信道上发送随机接入序列； 所述 UE接收所述基站对所述随机接入序列进行响应的随机接入响应。
3. 根据权利要求 1或 2所述的方法， 其中， 所述受保护的子帧包括： 与相邻小区 的几乎为空子帧 ABS 对应的子帧或者与所述相邻小区的多媒体广播组播业务 单频网络子帧 MBSFN子帧对应的子帧。
4. 根据权利要求 1至 2中任一项所述的方法， 其中， 所述预定的物理随机接入信 道是系统可用的物理随机接入信道集合的一个子集。
5. 根据权利要求 4所述的方法， 其中， 所述预定的物理随机接入信道的指示信息与 系统可用的物理随机接入信道的指示信息联合指示所述预定的物理随机接入信 道， 其中， 所述系统可用的物理随机接入信道的指示信息用于指示所述系统可 用的物理随机接入信道集合。
6. 根据权利要求 1或 2所述的方法， 其中， 所述在预定的物理随机接入信道上发 送的随机接入序列与在所述系统可用的物理随机接入信道上发送的随机接入序 列不同。
7. 一种随机接入方法， 包括：
基站确定预定的物理随机接入信道， 其中， 所述预定的物理随机接入信道 上承载的随机接入序列对应的随机接入响应在受保护的子帧上进行发送； 所述基站将所述预定的物理随机接入信道的信息发送给用户设备 UE。
8. 根据权利要求 7所述的方法， 其中， 在所述基站将所述预定的物理随机接入信 道的信息发送给用户设备 UE之后， 还包括： 所述基站在所述预定的物理随机接入信道上接收所述 UE发送的随机接入 序列；
所述基站在所述受保护的子帧上发送对应于所述随机接入序列的随机接入 响应。
9. 根据权利要求 7所述的方法， 其中， 所述受保护的子帧包括： 与相邻小区的几 乎为空子帧 ABS 对应的子帧或者与所述相邻小区的多媒体广播组播业务单频 网络子帧 MBSFN子帧对应的子帧。
10. 根据权利要求 7所述的方法， 其中， 所述基站通过以下方式之一或其任意组合 将所述预定的物理随机接入信道的信息发送给所述 UE:
系统消息、 无线资源控制 RRC连接重配消息、 下行控制信息。
11. 根据权利要求 10所述的方法， 其中， 所述 RRC连接重配消息通过所述 UE的 服务基站透明传输。
12. 根据权利要求 7至 11中任一项所述的方法， 其中， 所述基站包括： 宏基站、 微 基站或家庭基站。
13. 一种随机接入装置， 应用于用户设备 UE， 包括：
获取模块， 设置为获取基站发送的用于指示预定的物理随机接入信道的信 息， 其中， 所述预定的物理随机接入信道上承载的随机接入序列对应的随机接 入响应在受保护的子帧上进行发送；
随机接入模块， 设置为在所述信息指示预定的物理随机接入信道上进行随 机接入。
14. 根据权利要求 13所述的装置， 其中， 所述随机接入模块包括：
第一发送模块， 设置为在所述指示的预定的物理随机接入信道发送随机接 入序列；
第一接收模块， 设置为接收所述基站对所述随机接入序列进行响应的随机 接入响应。
15. 一种随机接入装置， 应用于基站， 包括：
确定模块， 用于确定预定的物理随机接入信道， 其中， 所述预定的物理随 机接入信道上承载的随机接入序列对应的随机接入响应在受保护的子帧上进行 发送；
第二发送模块， 用于将所述预定的物理随机接入信道的信息发送给用户设 备 UE。
16. 根据权利要求 15所述的装置， 其中， 还包括： 第二接收模块， 设置为在所述预定的物理随机接入信道上接收所述 UE发 送的随机接入序列；
第三发送模块， 设置为在所述受保护的子帧上发送对应于所述随机接入序 列的随机接入响应。
PCT/CN2012/073354 2011-08-15 2012-03-30 随机接入方法及装置 WO2012152154A1 (zh)

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