WO2010102457A1 - Procédé et appareil de transmission de signalisations d'accès aléatoire court, procédé et appareil d'acheminement de canaux d'accès aléatoire court - Google Patents

Procédé et appareil de transmission de signalisations d'accès aléatoire court, procédé et appareil d'acheminement de canaux d'accès aléatoire court Download PDF

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Publication number
WO2010102457A1
WO2010102457A1 PCT/CN2009/070794 CN2009070794W WO2010102457A1 WO 2010102457 A1 WO2010102457 A1 WO 2010102457A1 CN 2009070794 W CN2009070794 W CN 2009070794W WO 2010102457 A1 WO2010102457 A1 WO 2010102457A1
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WO
WIPO (PCT)
Prior art keywords
random access
short random
signaling
time slot
access channel
Prior art date
Application number
PCT/CN2009/070794
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English (en)
Chinese (zh)
Inventor
吕永霞
万蕾
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN200980122538.7A priority Critical patent/CN102388668B/zh
Priority to PCT/CN2009/070794 priority patent/WO2010102457A1/fr
Publication of WO2010102457A1 publication Critical patent/WO2010102457A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • 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

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for transmitting short random access signaling and a method and apparatus for carrying a short random access channel. Background technique
  • Each pilot format is associated with a RACH ( Random Acces s Channe l , random
  • the time length of the RACH corresponding to the pilot format 4 is only 0. 147ms, and the occupied overhead is much smaller than the other four pilot formats. Therefore, the RACH corresponding to the pilot format 4 is also called short RACH.
  • the main application scenario of the short RACH is an urban area with a cell radius not exceeding 1. 4km.
  • the radius of the urban area is 4 ⁇ , generally not more than 1. 4km; that is, the short RACH should be in the city.
  • the region's LTE system is widely used.
  • the existing LTE (Long Term Evolution) system cannot carry the short RACH in the FDD (Frequency Dividing I) mode, even if the cell radius does not exceed 1 In the 4km urban area, only the RACH corresponding to other pilot formats can be used, resulting in a large overhead.
  • Embodiments of the present invention provide a method and apparatus for transmitting short random access signaling, and a method and apparatus for carrying a short random access channel, so that an LTE system can carry a short random access channel in an FDD mode, thereby saving System overhead.
  • a method for transmitting short random access signaling includes:
  • Broadcast signaling carrying the short random access signaling is transmitted.
  • a method for carrying a short random access channel comprising:
  • a short random access channel pilot sequence is transmitted on the time slot.
  • An apparatus for transmitting short random access signaling includes:
  • a time slot determining module configured to determine a time slot carrying a short random access channel in the downlink carrier, and a signaling determining module, configured to determine short random access signaling according to the time slot;
  • the broadcast sending module is configured to send broadcast signaling that carries the short random access signaling.
  • a device for carrying a short random access channel comprising:
  • a receiving module configured to receive broadcast signaling carrying short random access signaling
  • a time slot selection module configured to obtain a time slot carrying a short random access channel according to the short random access signaling
  • a pilot sending module configured to send a short random access channel pilot sequence on the time slot.
  • an uplink time slot is defined in a radio frame of a downlink carrier, and a short random access channel is carried by the uplink time slot, thereby implementing a short random access channel in an FDD mode in an LTE system. Saves system overhead.
  • FIG. 1 is a flowchart of a method for transmitting short random access signaling according to an embodiment of the present invention
  • FIG. 2 is a flowchart of determining a time slot for carrying a short random access channel in a downlink carrier according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a frame of a radio frame carrying a short random access channel in a downlink carrier according to an embodiment of the present disclosure
  • FIG. 4 is a flowchart of a method for carrying a short random access channel according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of selecting a short random access channel according to the random access signaling according to an embodiment of the present invention
  • Flow chart of the gap
  • FIG. 6 is a structural diagram of an apparatus for transmitting short random access signaling according to an embodiment of the present invention
  • FIG. 7 is a structural diagram of a time slot determining module according to an embodiment of the present invention
  • FIG. 8 is a structural diagram of a signaling determining module according to an embodiment of the present invention.
  • FIG. 9 is a structural diagram of an apparatus for carrying a short random access channel according to an embodiment of the present invention.
  • FIG. 10 is a structural diagram of a time slot selection module according to an embodiment of the present invention. detailed description
  • a method for sending short random access signaling includes:
  • the base station After the base station determines the time slot of the downlink carrier carrying the short random access channel, according to the time slot Determining location information of the short random access channel, the location information comprising: a short random access channel configuration index, and/or a pilot format, and/or a short random access channel density. And querying a correspondence table between the location information and the short random access signaling set by the base station and the user terminal according to the location information, so as to obtain the short random access signaling corresponding to the location information, and the short random access
  • the incoming signaling is carried in the broadcast signaling.
  • the correspondence table is as shown in Table 2:
  • the short random access signaling has a total of 4 bits, and can provide 16 different states. In the embodiment of the present invention, only the first 11 states, that is, 0 to 10 are used; wherein, the broadcast signaling is 10 hours. It is indicated that the base station does not carry a short random access channel.
  • the location of the short random access channel time slot may be characterized by a short random access channel configuration index and a short random access channel density, that is, after the base station determines the time slot, the short random access channel configuration index And the short random access channel density is also determined.
  • the short random access channel configuration index and the short random access channel density corresponding to the short random access channel density in the broadcast signaling for example, when the short random access channel configuration index is 55, When the short random access channel density is 4, the short random access signaling corresponding to the two is 7 at the time, and 7 is carried in the broadcast signaling in the form of 4b it binary code, and the The broadcast signaling timing is broadcasted in the cell covered by the base station, so that the user terminal to be accessed in the cell can be acquired in time; in the embodiment of the present invention, 4b it random access signaling is used to characterize the uplink time slot.
  • the location information in order to further save the signaling resources, the present invention further provides another embodiment, using 3b it random access signaling to characterize the location of the uplink time slot, as shown in Table 3,
  • Table 3 deletes the location configuration mode in which the random access channel density is repeated, and only reserves 8 different states. It can be fully characterized by 3b it random access signaling, where random connection When the incoming signaling is 7, it indicates that the base station does not carry the short random access channel at this time, and therefore, the signaling resource is saved.
  • the different locations of the broadcast signaling include the short random access signaling in Table 2 or Table 3 and the random access signaling on behalf of other RACH bearers. The user can choose it.
  • the user in the system may query the correspondence between the location information set by the user end and the short random access signaling according to the short random access signaling, and obtain the location information corresponding to the short random access signaling, and further The location information obtains a specific location of the time slot determined by the base station, and sends a short random access channel pilot sequence to the base station in the time slot.
  • the step of determining a time slot carrying a short random access channel in a downlink carrier includes:
  • the radio frame carried by the downlink carrier is divided into at least one subframe with an equal length of time, where at least one subframe is used for short random access;
  • At least one subframe having an equal length of time may be 10 subframes of equal duration
  • the subframe for short random access is divided into at least two time slots, where one time slot is an uplink time slot, and the uplink time slot is used to carry a short random access channel, where at least two time slots are used.
  • the gap can be two or three or more.
  • the embodiment of the present invention divides the radio frame carried by the downlink carrier into at least one subframe with the same time length, and divides the subframe used for random access into the uplink time slot for carrying the short random access channel, thereby
  • the short random access channel is carried in the FDD mode in the LTE system, which saves system overhead.
  • an embodiment of the present invention provides a frame structure of a radio frame that can carry a short random access channel in a downlink carrier, where a radio frame with a length of 10 ms has 10 lengths of 1 ms.
  • the sub-frame is composed.
  • subframe 1 and subframe 6 are random access subframes, and the rest are normal downlink subframes.
  • the random access subframe is divided into three time slots, including: a downlink time slot, a time slot interval, and an uplink time slot; and the uplink time slot is used to carry a short random access channel.
  • the frame structure of the radio frame shown in FIG. 3 provided in the embodiment of the present invention to be described is only It is a structure of a radio frame for carrying a short random access channel.
  • the frame structure provided by the person skilled in the art according to FIG. 3 of the present invention may also be used without creative work. Get other frame structures.
  • a method for carrying a short random access channel by defining a radio frame that can carry a short random access channel in a downlink carrier, and transmitting a time slot carrying the short random access channel in the The location information in the radio frame is broadcasted in the system, so that the user in the system can send the short random access channel pilot sequence in the time slot corresponding to the location information according to the broadcast content, thereby saving system overhead.
  • an embodiment of the present invention provides a method for carrying a short random access channel, including:
  • the time slot of the short random access channel is obtained according to the short random access signaling.
  • the embodiment of the present invention has backward compatibility, that is, the user can select to carry the short random access channel or the bearer.
  • the other random access channels may be selected by the user according to their own needs.
  • the time slot carrying the short random access channel is selected according to the random access signaling.
  • the step of obtaining a time slot carrying a short random access channel includes:
  • 501 Obtain location information of the short random access channel according to the short random access signaling, and obtain the location information preset in the user terminal after obtaining the short random access signaling from the broadcast signaling.
  • a random access signaling correspondence table as shown in Table 2 or Table 3, obtaining, from the table, location information of the time slot carrying the short random access channel corresponding to the short random access signaling,
  • the location information includes: a short random access channel configuration index, and/or a pilot format, and/or a short random access channel density.
  • 502. Determine a time slot of the short random access channel according to the location information.
  • the time slot carrying the short random access channel is characterized by the location information, and after acquiring the location information, the user terminal selects the time slot of the short random access channel corresponding to the location information according to the location information. .
  • the method for carrying a short random access channel obtains the time slot of the bearer short random access channel according to the short random access signaling by acquiring short random access signaling from the broadcast signaling.
  • the location information is used to select the time slot carrying the short random access channel according to the location information, and send a pilot sequence on the time slot to implement bearer of the short random access channel, thereby saving system overhead.
  • an apparatus for transmitting short random access signaling including:
  • the time slot determining module 601 is configured to determine a time slot of the downlink carrier that carries the short random access channel, and the signaling determining module 602 is configured to determine the short random access signaling according to the time slot determined by the time slot determining module 601.
  • the broadcast sending module 603 is configured to send broadcast signaling that carries the short random access signaling determined by the signaling determining module 602.
  • the time slot determining module 601 includes:
  • the subframe dividing unit 701 is configured to divide the radio frame carried by the downlink carrier into at least one subframe having an equal length of time, where at least one subframe is used for short random access;
  • the time slot dividing unit 702 is configured to divide the subframe used for the short random access divided by the subframe dividing unit 701 into at least two time slots, where one time slot is an uplink time slot, and the uplink time slot is used by the uplink time slot. Carrying a short random access channel.
  • the signaling determining module 602 includes:
  • a location information determining unit 801 configured to determine location information of the short random access channel according to the time slot;
  • a signaling obtaining unit 802 configured to determine location information determined by the location information by the location information Obtain short random access signaling.
  • An apparatus for transmitting short random access signaling provided by an embodiment of the present invention, by defining a radio frame that can carry a short random access channel in a downlink carrier, and transmitting a time slot carrying the short random access channel
  • the location information in the radio frame is broadcasted in the system, so that the user in the system can send the short random access channel pilot sequence in the time slot corresponding to the location information according to the broadcast content, thereby saving system overhead.
  • an embodiment of the present invention provides an apparatus for carrying a short random access channel, including:
  • the receiving module 901 is configured to receive broadcast signaling that carries short random access signaling
  • a time slot selection module 902 configured to select a time slot carrying a short random access channel according to short random access signaling in the broadcast signaling received from the receiving module 901;
  • the pilot sending module 903 is configured to send a short random access channel pilot sequence in a time slot selected by the time slot selecting module 903.
  • the time slot selection module 902 includes:
  • a location determining unit 1001 configured to obtain location information of a short random access channel
  • the time slot determining unit 1002 is configured to determine, according to the location information determined by the location information determining unit 1001, the time slot carrying the short random access channel.
  • the apparatus for carrying the short random access channel obtained by the embodiment of the present invention obtains the location information of the time slot carrying the short random access channel from the broadcast signaling by receiving the broadcast signaling sent by the base station, and according to the location The information finds the specific location of the time slot, thereby realizing the bearer of the short random access channel, and saving system overhead.
  • An embodiment of the present invention provides a base station and a user terminal, where the base station includes, as shown in FIG. 6, a device for transmitting short random access signaling, where the user terminal includes a short random bearer as shown in FIG. A device that accesses a channel.
  • the broadcast signaling is first received, the short random access signaling is obtained therefrom, and the location of the time slot carrying the short random access channel is determined according to the short random access signaling.
  • Information and determining the time slot according to the location information, and transmitting a short random access channel pilot sequence to the base station on the time slot.
  • the base station and the user terminal provided by the embodiment of the present invention enable the user terminal to transmit a short random access channel pilot sequence in the downlink carrier when accessing the system, which saves system overhead compared with the prior art.

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

Abstract

La présente invention concerne un procédé et un appareil de transmission de signalisations d'accès aléatoire court, un procédé et un appareil d'acheminement de canaux d'accès aléatoire court se rapportant au domaine technique de la communication. L'objectif est de résoudre le problème du système d'évolution à long terme LTE actuel, où les canaux d'accès aléatoire court ne peuvent pas être acheminés dans un mode de duplexage par répartition de fréquence FDD. Le procédé d'acheminement de canaux d'accès aléatoire court fourni par le mode de réalisation de l'invention consiste à : déterminer les intervalles dans les ondes porteuses descendantes pour acheminer les canaux d'accès aléatoire court (101) ; déterminer les signalisations d'accès aléatoire en fonction de la position des intervalles (102) ; transmettre les signalisations de diffusion qui acheminent les signalisations d'accès aléatoire (103). Le mode de la réalisation de la présente invention permet aux canaux d'accès aléatoire court d'être acheminés et évite un surdébit du système.
PCT/CN2009/070794 2009-03-13 2009-03-13 Procédé et appareil de transmission de signalisations d'accès aléatoire court, procédé et appareil d'acheminement de canaux d'accès aléatoire court WO2010102457A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200980122538.7A CN102388668B (zh) 2009-03-13 2009-03-13 一种发送短随机接入信令的方法和装置及承载短随机接入信道的方法和装置
PCT/CN2009/070794 WO2010102457A1 (fr) 2009-03-13 2009-03-13 Procédé et appareil de transmission de signalisations d'accès aléatoire court, procédé et appareil d'acheminement de canaux d'accès aléatoire court

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PCT/CN2009/070794 WO2010102457A1 (fr) 2009-03-13 2009-03-13 Procédé et appareil de transmission de signalisations d'accès aléatoire court, procédé et appareil d'acheminement de canaux d'accès aléatoire court

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WO2010102457A1 true WO2010102457A1 (fr) 2010-09-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105517182A (zh) * 2014-09-26 2016-04-20 中兴通讯股份有限公司 一种随机接入信令的发送方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1104402A (zh) * 1993-04-02 1995-06-28 莫托罗拉有限公司 多信道随机接入通信系统
CN1298579A (zh) * 1998-02-27 2001-06-06 西门子公司 在码分多址和时分多址基础上在移动的和/或固定的发送机/接收机之间进行无线电通信的通信系统
CN1855767A (zh) * 2005-04-18 2006-11-01 大唐移动通信设备有限公司 在时分同步码分多址通信系统中建立大半径小区的方法
CN101345580A (zh) * 2008-08-22 2009-01-14 中兴通讯股份有限公司 随机接入信道的发送方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1104402A (zh) * 1993-04-02 1995-06-28 莫托罗拉有限公司 多信道随机接入通信系统
CN1298579A (zh) * 1998-02-27 2001-06-06 西门子公司 在码分多址和时分多址基础上在移动的和/或固定的发送机/接收机之间进行无线电通信的通信系统
CN1855767A (zh) * 2005-04-18 2006-11-01 大唐移动通信设备有限公司 在时分同步码分多址通信系统中建立大半径小区的方法
CN101345580A (zh) * 2008-08-22 2009-01-14 中兴通讯股份有限公司 随机接入信道的发送方法和装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105517182A (zh) * 2014-09-26 2016-04-20 中兴通讯股份有限公司 一种随机接入信令的发送方法及装置

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CN102388668B (zh) 2015-06-03
CN102388668A (zh) 2012-03-21

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