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WO2014019518A1 - Procédé d'accès aléatoire et équipement d'utilisateur - Google Patents

Procédé d'accès aléatoire et équipement d'utilisateur Download PDF

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Publication number
WO2014019518A1
WO2014019518A1 PCT/CN2013/080535 CN2013080535W WO2014019518A1 WO 2014019518 A1 WO2014019518 A1 WO 2014019518A1 CN 2013080535 W CN2013080535 W CN 2013080535W WO 2014019518 A1 WO2014019518 A1 WO 2014019518A1
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Prior art keywords
signature sequence
signature
sequence
module
selection
Prior art date
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PCT/CN2013/080535
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English (en)
Chinese (zh)
Inventor
赵建荣
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2014019518A1 publication Critical patent/WO2014019518A1/fr
Anticipated expiration legal-status Critical
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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

  • Embodiments of the present invention relate to the field of wireless communications, and more particularly, to a method and user equipment for random access. Background technique
  • the new mobile communication system has been favored for many advantages such as its powerful multimedia communication capability, high-speed data transmission rate and efficient spectrum utilization, and has become the development goal of mobile communication in the future.
  • WCDMA Wideband Code Division Multiple Access
  • the channels of WCDMA can be divided into two categories: dedicated channels and common channels.
  • the dedicated channel includes: a traffic channel, a separate dedicated control channel, and a dedicated control channel.
  • Common channels include: broadcast control channel, forward access channel, paging channel, random access channel. These channels are mapped to the corresponding physical channels in different ways, namely dedicated physical channels and common physical channels.
  • the common physical channel is further divided into a downlink common physical channel and an uplink common physical channel.
  • WCDMA systems work in two ways, including Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the uplink common physical channel of the WCDMA system in the FDD mode is a Physical Random Access Channel (PRACH).
  • PRACH Physical Random Access Channel
  • the user equipment (UE, User Equipment) randomly accesses the WCDMA system through the PRACH channel, and communicates with the base station (NodeB) to obtain the service provided by the WCDMA system.
  • UE User Equipment
  • NodeB base station
  • the random access procedure performed between the user equipment and the NodeB is implemented by a slotted random access method with a fast access indication. It consists of a preamble (Preamble) and a message (Message).
  • the leader sequence is generated by a signature sequence.
  • the signature sequence consists of 16 complex symbols (1+j or -1-j, where j is an imaginary unit). There are 16 different signature sequences for WCDMA. Theoretically, each PRACH channel allows 16 users to access each access time slot, while different PRACH channels are differentiated by spreading codes.
  • the user sends the preamble sequence as an access request through the uplink PRACH channel, and the NodeB determines whether to allow access according to the preamble sequence detected on the PRACH channel, and the downlink acquisition indicator channel (AICH, Acquisition) Send Channel Get the indicator (AI, Acquisition Indicator) information to the user.
  • the AI information may be an acknowledgment information (ACK) or a non-acknowledgement message (NACK), respectively indicating whether the NodeB allows the user to continue to transmit the message signal.
  • the UE does not receive the AI information from the NodeB, it needs to reselect the signature sequence, which may result in the use of different signature sequences in a complete random access procedure. Summary of the invention
  • the embodiment of the invention provides a random access method and user equipment, which can ensure that the same signature sequence is always used in the random access process.
  • a method for random access including: determining a set of available signature sequences; selecting a first signature sequence from the set of available signature sequences, and outputting the first signature sequence to a physical layer logic module;
  • the layer logic module performs signature sequence selection based on the first signature sequence, generates a preamble sequence according to the result of the signature sequence selection, and sends the preamble sequence to the base station.
  • the performing is performed from a sequence of available signatures.
  • the process of selecting the first signature sequence from the set of available signature sequences is performed by the software module of layer 1 in the physical layer logic module. Executed before access.
  • the selecting the first signature sequence from the set of available signature sequences comprises: randomly selecting the first signature sequence from the set of available signature sequences .
  • the method further includes: if the acquisition indicator information corresponding to the preamble sequence is not received from the base station, the physical layer logic module is repeatedly executed. A process of performing signature sequence selection based on the first signature sequence, generating a preamble sequence based on the result of the signature sequence selection, and transmitting the preamble sequence to the base station.
  • a second aspect provides a user equipment, including: a determining module, configured to determine a set of available signature sequences; a selecting module, configured to select a first signature sequence from a set of available signature sequences determined by the determining module, and to obtain a first signature The sequence is output to the physical layer logic module, and the physical layer logic module is configured to receive the first signature sequence from the selection module, perform signature sequence selection based on the first signature sequence, generate a preamble according to the result of the signature sequence selection, and send the preamble sequence to the base station.
  • the selection module is a module of layer 2 or layer 3.
  • the selection module is a layer 1 software module.
  • the selection module can randomly select the first signature sequence from the set of available signature sequences.
  • the physical layer logic module may be repeatedly executed if the user equipment does not receive the capture indicator information corresponding to the preamble sequence from the base station.
  • the embodiment of the present invention inputs a certain first signature sequence to the physical layer logic module, so that the physical layer logic module always uses the same signature sequence in a complete random access procedure.
  • FIG. 1 is a flow chart of a random access method according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of a user equipment in accordance with an embodiment of the present invention.
  • FIG. 3 is a block diagram of a user equipment according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a random access implementation manner according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a random access implementation manner according to another embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a random access implementation manner according to another embodiment of the present invention. detailed description
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • a user equipment which may also be called a mobile terminal (Mobile Terminal), a mobile user equipment, etc., may communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network).
  • the user equipment may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a mobile device that can be portable, pocket, handheld, computer built, or in-vehicle,
  • the wireless access network exchanges languages and/or data.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNB or e-NodeB, evolutional Node B) in LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB evolved base station
  • e-NodeB evolutional Node B
  • FIG. 1 is a flow chart of a random access method according to an embodiment of the present invention. The method of Figure 1 is performed by a user equipment.
  • the embodiment of the present invention does not limit the type and number of signature sequences included in the available set of available signatures.
  • the set of available signature sequences can contain up to 16 signature sequences; in an LTE system, the set of available signature sequences can contain up to 64 signature sequences.
  • the set of available signature sequences is generally configured by the network side to the user equipment.
  • the base station can notify the user equipment by means of broadcast, etc., and the user equipment obtains the set of available signature sequences by parsing the information carried by the broadcast.
  • the embodiment of the present invention does not limit this.
  • the Physical Layer Logic (PHY Logic) module is a hardware module in Layer 1 (L1; Layer 1).
  • Layer 1 also includes a physical layer software module.
  • the physical layer logic module performs signature sequence selection based on the first signature sequence, generates a preamble sequence according to the result of the signature sequence selection, and sends a preamble sequence to the base station.
  • the physical layer logic module can perform random access according to the prior art, including signature sequence selection. The process of selecting, generating a preamble sequence and transmitting a preamble sequence. For example, the physical layer logic module can randomly select the signature sequence, and the random function used can make the probability of each selection equal. The physical layer logic module may also determine an uplink access slot and a preamble transmission power, and generate according to the determined uplink access slot, the result of the signature sequence selection, and the preamble transmission power. And send the preamble sequence.
  • the result of the physical layer logic module performing the signature sequence selection in step 103 is still the first signature sequence.
  • the embodiment of the present invention inputs a certain first signature sequence to the physical layer logic module, so that the physical layer logic module always uses the same signature sequence in a complete random access procedure.
  • the so-called complete random access procedure refers to a process of successfully transmitting a preamble sequence to a base station and receiving corresponding AI information from the base station.
  • step 103 if the AI information corresponding to the preamble sequence sent in step 103 is not received from the base station, the process of step 103 is repeatedly performed, for example, until the corresponding AI information is received from the base station or the random access fails. .
  • the method of Fig. 1 can be re-executed, and the first signature sequence is selected again in step 102.
  • the first signature sequence selected again may be the same as or different from the previous signature sequence selected in the previous embodiment of the present invention.
  • the embodiment of the present invention is not limited thereto, and the embodiment of the present invention may perform only the process of step 103 in the subsequent random access process, and no longer perform steps 101 and 102.
  • step 102 of FIG. 1 may be performed by layer 2 (L2; Layer 2) or layer 3 (L3; Layer 3) after receiving a set of available signature sequences.
  • Layer 2 and Layer 3 are generally implemented by software modules, and layer 2 includes related functional modules for implementing RLC (Radio Link Control) and MAC (Media Access Control), and layer 3 includes implementing RRC.
  • Related function modules such as (Radio Resource Control).
  • the functional module responsible for air interface signaling processing in layer 2 or layer 3 selects a signature sequence from the set of available signature sequences as the first signature sequence output to the physical layer logic module. This method only needs to improve the software module of layer 2 or layer 3, which is relatively easy to implement.
  • step 102 of FIG. 1 may be performed by a software module of layer 1 (also referred to as a physical layer software module) before the physical layer logic module performs random access.
  • a software module of layer 1 also referred to as a physical layer software module
  • step 102 is implemented by a physical layer software module, so that only the software module of layer 1 is improved, which is relatively easy to implement.
  • the first signature sequence may be randomly selected from the set of available signature sequences.
  • the random selection of step 102 can be performed in the same manner as the physical layer logic module performs the signature sequence selection such that each signature sequence has an equal probability. This can avoid conflicts with the random access process of other user equipments and improve communication efficiency.
  • the user equipment 20 of FIG. 2 includes a determination module 21, a selection module 22, and a physical layer logic module 23.
  • the determination module 21 determines the set of available signature sequences.
  • the selection module 22 selects the first signature sequence from the set of available signature sequences determined by the determination module 21 and outputs the first signature sequence to the physical layer logic module.
  • the physical layer logic module 23 receives the first signature sequence from the selection module 22, performs signature sequence selection based on the first signature sequence, generates a preamble based on the result of the signature sequence selection, and transmits a preamble sequence to the base station.
  • the embodiment of the present invention inputs a certain first signature sequence to the physical layer logic module, so that the physical layer logic module always uses the same signature sequence in a complete random access procedure.
  • User equipment 20 may implement the various steps of the method of Figure 1, and to avoid repetition, it will not be described in detail.
  • the physical layer logic module 23 may repeatedly perform the result of performing the signature sequence selection based on the first signature sequence and selecting according to the signature sequence. The process of generating a preamble sequence and transmitting a preamble sequence to the base station, for example, until the user equipment receives the corresponding AI information from the base station or the random access fails.
  • the selection module 22 may be a module of layer 2 or layer 3.
  • the selection module 22 may select the first signature sequence after the receiving module 21 receives the available signature sequence.
  • Layer 2 and Layer 3 are generally implemented by software modules. This method only needs to improve the software module of layer 2 or layer 3, which is relatively easy to implement.
  • the selection module 22 may be a software module of layer 1. This method only selects the first signature sequence before the random access needs to be initiated, and the implementation manner is more flexible. In addition, this method only needs to improve the software module of layer 1, which is relatively easy to implement.
  • the selection module 22 may randomly select the first signature sequence from the set of available signature sequences. For example, selection module 22 may perform random selection in the same manner as physical layer logic module 23 performs signature sequence selection such that each signature sequence has an equal probability. In this way, collisions with random access procedures of other user equipments can be avoided as much as possible, and communication efficiency is improved.
  • the user equipment 30 of FIG. 3 is a block diagram of a user equipment according to another embodiment of the present invention.
  • the user equipment 30 of FIG. 3 includes a processor 31, a memory 32, and a physical layer logic module 33.
  • the memory 32 stores instructions that cause the processor 31 to: determine a set of available signature sequences; select a first signature sequence from the set of available signature sequences, and output the first signature sequence to the physical layer logic module 33.
  • the physical layer logic module 23 receives the first signature sequence, performs signature sequence selection based on the first signature sequence, generates a preamble according to the result of the signature sequence selection, and sends a preamble sequence to the base station.
  • the embodiment of the present invention inputs a certain first signature sequence to the physical layer logic module, so that the physical layer logic module always uses the same signature sequence in a complete random access procedure.
  • the processor 31, the memory 32, and the physical layer logic module 33 can be integrated into one processing chip. Alternatively, as shown in FIG. 3, the processor 31, the memory 32, and the physical layer logic module 33 are connected by a bus system 39.
  • the user equipment 30 may further include a transmitting circuit 34, a receiving circuit 35, an antenna 36, and the like.
  • the processor 31 can also control the operation of the user equipment 30, which can also be referred to as a CPU (Central Processing Unit).
  • Memory 32 can include read only memory and random access memory and provides instructions and data to processor 31. A portion of the memory 32 may also include a non-volatile random access memory.
  • transmit circuitry 34 and receive circuitry 35 can be coupled to antenna 36.
  • the various components of the user equipment 30 are coupled together by a bus system 69, which may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like. However, for clarity of description, various buses are labeled as bus system 69 in the figure.
  • the receiving circuit 53 can acquire a broadcast message from the base station via the antenna 55, so that the processor 31 extracts a set of available signature sequences from the broadcast message.
  • the preamble sequence can be transmitted to the base station through the transmitting circuit 54 and the antenna 55.
  • the method disclosed in the foregoing embodiment of the present invention may be applied to the processor 31 or by the processor.
  • Processor 31 may be an integrated circuit chip with signal processing capabilities. In reality In the present process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 31 or an instruction in a form of software.
  • the processor 31 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware. Component.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or executed.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 32, and the processor 31 reads the information in the memory 32 and combines the hardware to perform the steps of the above method.
  • the processor 31 may randomly select the first signature sequence from the set of available signature sequences.
  • processor 31 may perform random selection in the same manner as physical layer logic module 33 performs signature sequence selection such that each signature sequence has an equal probability. In this way, it is possible to avoid conflicts with the random access process of other user equipments and improve communication efficiency.
  • FIG. 4 is a schematic diagram of a random access implementation manner according to an embodiment of the present invention.
  • the selection of the first signature sequence is implemented by the L1 layer.
  • the user equipment 40 includes an RRC (Layer 3) module 41, and an RLC/MAC (layer).
  • RRC Layer 3
  • RLC/MAC layer
  • Module 42 PHY (Layer 1) software module 43 and PHY Logic Module 44.
  • PHY (Layer 1) software module 43 PHY (Layer 1) software module 43
  • PHY Logic Module 44 PHY Logic Module 44.
  • the above-described modules 41-43 can be implemented by corresponding instructions stored in the memory 32 shown in Fig. 3 and executed by the processor 31.
  • the PHY logic module 44 can be implemented by separate hardware circuitry and can be implemented in accordance with prior art implementations and therefore will not be described in detail.
  • the PHY software module 43 receives the set of available signature sequences S from a higher layer (such as the RRC module 41 or the RLC/MAC module 42), assuming that the set of available signature sequences S contains 16 available signature sequences s0-sl5, but the embodiment of the present invention does not Limited to this specific number.
  • the PHY software module 43 initiates a transmit operation and randomly selects a signature sequence from the set of available signature sequences S, assuming s8.
  • the PHY software module 43 outputs the selected signature sequence s8 to the PHY hardware module 44.
  • the PHY hardware module 44 treats the signature sequence s8 as an input in accordance with the procedures of the prior art specification.
  • a set of available signature sequences S and based on the set of available signature sequences S, a signature sequence is randomly selected for generating a preamble sequence. Since the set of signature sequences S is available, only the signature sequence s8 is actually included, so the PHY hardware module 44 can only select the signature sequence s8 to generate the preamble sequence. Even in a subsequent process, such as because no positive AI or negative AI is detected, the signature sequence needs to be reselected, and the PHY hardware module 44 still selects the signature sequence s8 without using other signature sequences.
  • This embodiment does not need to modify the RRC module 41, the RLC/MAC module 42 and the PHY logic module 44, and only needs to add a function for selecting the first signature sequence in the PHY software module 43, which is relatively easy to implement.
  • FIG. 5 is a schematic diagram of a random access implementation manner according to another embodiment of the present invention.
  • the selection of the first signature sequence is implemented by the L2 layer.
  • the user equipment 50 includes an RRC (Layer 3) module 51, an RLC/MAC (Layer 2) module 52, a PHY (Layer 1) software module 53, and a PHY logic module 54.
  • RRC Layer 3
  • RLC/MAC Layer 2
  • PHY Layer 1
  • PHY logic module 54 the above-described modules 51-53 can be implemented by corresponding instructions stored in the memory 32 shown in FIG. 3 and executed by the processor 31.
  • the PHY logic module 54 can be implemented by separate hardware circuits and can be referred to in the prior art implementations and therefore will not be described in detail.
  • the RLC/MAC module 52 determines the set of available signature sequences S, for example, the set of available signature sequences S can be received from the RRC module 51. It is assumed that the set of available signature sequences S contains 16 available signature sequences s0-sl5, but embodiments of the invention are not limited to this particular number. When a random access needs to be initiated, the RLC/MAC module 52 randomly selects a signature sequence from the set of available signature sequences S, assuming s8. The RLC/MAC module 52 outputs the selected signature sequence s8 to the PHY hardware module 54.
  • the PHY hardware module 54 treats the signature sequence s8 as an input set of available signature sequences S, and based on the set of available signature sequences S, randomly selects a signature sequence for generating a preamble sequence. Since the set of signature sequences S is available, only the signature sequence s8 is actually included, so the PHY hardware module 54 can only select the signature sequence s8 to generate the preamble sequence. Even in the subsequent process, for example, because the positive AI or negative AI is not detected, the signature sequence needs to be reselected, and the PHY hardware module 54 still selects the signature sequence s8 without using other signature sequences.
  • This embodiment does not require the RRC module 51, the PHY software module 53, and the PHY logic module 54. To make the transformation, it is relatively easy to implement the function of selecting the first signature sequence in the RLC/MAC module 52.
  • FIG. 6 is a schematic diagram of a random access implementation manner according to another embodiment of the present invention.
  • the selection of the first signature sequence is implemented by the L3 layer.
  • the user equipment 60 includes an RRC (Layer 3) module 61, and an RLC/MAC (layer).
  • RRC Layer 3
  • RLC/MAC layer
  • Module 62 PHY (Layer 1) software module 63 and PHY Logic Module 64.
  • PHY (Layer 1) software module 63 can be implemented by corresponding instructions stored in the memory 32 shown in Fig. 3 and executed by the processor 31.
  • the PHY logic module 64 can be implemented by separate hardware circuits and can be referred to in the prior art implementations and therefore will not be described in detail.
  • the RRC module 61 determines the set of available signature sequences S, for example, by parsing the broadcast message sent by the base station to obtain the set of available signature sequences S. It is assumed that the set of available signature sequences S contains 16 available signature sequences s0-sl5, but embodiments of the invention are not limited to this particular number. When it is required to initiate random access, the RRC module 61 randomly selects a signature sequence from the set of available signature sequences S, assuming s8. The RRC module 61 outputs the selected signature sequence s8 to the PHY hardware module 64.
  • the PHY hardware module 64 treats the signature sequence s8 as an input set of available signature sequences S, and based on the set of available signature sequences S, randomly selects a signature sequence for generating a preamble sequence. Since the set of signature sequences S is available, only the signature sequence s8 is actually included, so the PHY hardware module 64 can only select the signature sequence s8 to generate the preamble sequence. Even in the subsequent process, for example, because the positive AI or negative AI is not detected, the signature sequence needs to be reselected, and the PHY hardware module 64 still selects the signature sequence s8 without using other signature sequences.
  • This embodiment does not need to modify the RLC/MAC module 62, the PHY software module 63, and the PHY logic module 64, and only needs to add a function for selecting the first signature sequence in the RRC module 61, which is relatively easy to implement.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • 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 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 separate, and the components displayed as units 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 objectives 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, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product 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 (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé d'accès aléatoire et un équipement d'utilisateur. Le procédé consiste à : déterminer un ensemble de séquences de signatures disponibles ; sélectionner une première séquence de signatures parmi l'ensemble de séquences de signatures disponibles et délivrer en sortie la première séquence de signatures à un module logique physique ; et le module logique physique exécute une sélection de séquence de signatures sur la base de la première séquence de signatures, génère une séquence de préambule selon un résultat de la sélection de séquence de signatures, et envoie la séquence de préambule à une station de base. Dans les modes de réalisation de la présente invention, une première séquence de signatures déterminée est introduite dans le module logique physique de sorte que, dans un processus d'accès entièrement aléatoire, le module logique physique utilise toujours une même séquence de signatures.
PCT/CN2013/080535 2012-08-03 2013-07-31 Procédé d'accès aléatoire et équipement d'utilisateur Ceased WO2014019518A1 (fr)

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US11228911B2 (en) * 2019-04-25 2022-01-18 Qualcomm Incorporated Physical layer security management

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WO2004023674A1 (fr) * 2002-09-06 2004-03-18 Nokia Corporation Procede de selection d'antenne
CN101248684A (zh) * 2005-08-23 2008-08-20 Lg电子株式会社 在无线移动通信系统中经上行信道发送和接收消息的方法
CN101478827A (zh) * 2008-01-04 2009-07-08 华为技术有限公司 一种再次发射前导签名的方法、系统和装置
CN101505499A (zh) * 2008-02-05 2009-08-12 华为技术有限公司 一种随机接入的控制方法、系统及设备

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Publication number Priority date Publication date Assignee Title
WO2004023674A1 (fr) * 2002-09-06 2004-03-18 Nokia Corporation Procede de selection d'antenne
CN101248684A (zh) * 2005-08-23 2008-08-20 Lg电子株式会社 在无线移动通信系统中经上行信道发送和接收消息的方法
CN101478827A (zh) * 2008-01-04 2009-07-08 华为技术有限公司 一种再次发射前导签名的方法、系统和装置
CN101505499A (zh) * 2008-02-05 2009-08-12 华为技术有限公司 一种随机接入的控制方法、系统及设备

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