WO2011018042A1 - Procédé et dispositif permettant de détecter une défaillance de liaison radio - Google Patents

Procédé et dispositif permettant de détecter une défaillance de liaison radio Download PDF

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Publication number
WO2011018042A1
WO2011018042A1 PCT/CN2010/075943 CN2010075943W WO2011018042A1 WO 2011018042 A1 WO2011018042 A1 WO 2011018042A1 CN 2010075943 W CN2010075943 W CN 2010075943W WO 2011018042 A1 WO2011018042 A1 WO 2011018042A1
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Prior art keywords
carrier
random access
access problem
mac layer
carriers
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PCT/CN2010/075943
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English (en)
Chinese (zh)
Inventor
梁靖
谌丽
刘佳敏
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大唐移动通信设备有限公司
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Publication of WO2011018042A1 publication Critical patent/WO2011018042A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a method and apparatus for determining a failure of a wireless link. Background technique
  • the peak rate of the LTE-A (Long Term Evolution Advanced) system is significantly higher than that of the LTE (Long Term Evolution) system, requiring downlink lGbps and uplink 500 Mbps.
  • the LTE-A system requires good compatibility with the LTE system, and the maximum bandwidth of the LTE system is 20 MHz.
  • the LTE-A system introduces CA (Carrier Aggregation) technology based on the need to increase the peak rate, be compatible with the LTE system, and make full use of the frequency resources.
  • FIG. 1 it is a schematic diagram of a carrier form of an LTE system; as shown in FIG. 2 , it is a schematic diagram of a carrier aggregation form of an LTE-A system.
  • Multiple component carriers (uplink or downlink) in the CA technology are aggregated together and serve the UE (User Equipment), instead of the mode of only one carrier in the LTE system and the previous wireless communication system.
  • a base station (such as an eNB) uniformly manages and schedules multiple sets of component carriers, and conversion between different component carriers in one base station is only a resource allocation problem.
  • the component carriers may be continuous or non-contiguous.
  • the maximum bandwidth of each component carrier is 20 MHz, and the bandwidth between the component carriers may be the same or different.
  • the types of component carriers in the CA technology include a backwards compatible carrier, a non-backwards compatible carrier, and an extension carrier.
  • the backward compatible carrier is compatible with the LTE system.
  • Non-backward compatible carriers are not compatible with earlier versions of LTE systems and can exist independently or as part of carrier aggregation; extended carriers cannot exist independently and are only part of carrier aggregation.
  • one or more specific carriers in the aggregated carrier may be defined as the primary carrier of the UE.
  • the primary carrier of the UE may be configured by the network, for example, the carrier of the primary serving cell of the UE is defined as the primary carrier of the UE, and the UE may only listen to system information on the primary carrier, perform cell handover based on the primary carrier, or only monitor the PDCCH of the primary carrier. (Physical Downlink Control Channel).
  • the primary carrier of the UE may remain unchanged or may be reconfigured by the network.
  • the UE determines whether a radio link failure is detected based on the following conditions: The T310 timer expires; and the random access problem indication reported by the MAC (Media Access Control) layer is received. When the T300, T301, T304, and T311 timers are invalid, an indication of the maximum number of retransmissions reported by the RLC (Radio Link Control) layer is received.
  • the T310 timer expires; and the random access problem indication reported by the MAC (Media Access Control) layer is received.
  • the RLC Radio Link Control
  • the T310 is associated with the physical layer synchronization "in-sync" and the out-of-sync "out-of-sync” indication.
  • the specific rules are: when the UE receives N310 "out-of-sync" indications continuously sent from the bottom layer and When the T300, T301, T304, and T311 timers are invalid, the timer T310 is started. When the T310 continuously receives N311 "in-sync" indications from the bottom layer, the UE stops the timer T310.
  • ⁇ 300 is used for the RRC (Radio Resource Control) connection establishment process
  • T301 and T311 are used for the RRC connection re-establishment process
  • T304 is used for the handover process.
  • the RRC layer ignores the random access problem indication reported by the MAC layer, and does not determine that the UE has failed the radio link.
  • the radio link failure decision method in the LTE system is performed on a single carrier, that is, for one working carrier.
  • the carrier aggregation mechanism when the quality of one carrier radio link is deteriorated, all other carriers cannot work. Case. Summary of the invention
  • Embodiments of the present invention provide a method and apparatus for determining a radio link failure, which are used to solve the problem of how to perform a radio link failure decision under carrier aggregation.
  • the embodiment of the invention provides a method for determining a radio link failure, which includes the following steps:
  • the MAC layer of the user equipment reports a random access problem indication to the RRC layer of the user equipment based on the carrier or carrier set of the user equipment;
  • An embodiment of the present invention provides a device for determining a radio link failure, including a MAC layer function module and an RRC layer function module;
  • the MAC layer function module is configured to report, according to a carrier or a carrier set of the user equipment, a random access problem indication to the RRC layer function module of the user equipment, where the RRC layer function module is configured to use, according to the MAC Determining, by the layer function module, the reporting form of the random access problem indication and the content of the report, determining whether the carrier of the user equipment has a random access problem at the MAC layer; when all carriers of the user equipment have a MAC layer The random access problem determines that the user equipment has failed the radio link.
  • the technical solution of the embodiment of the present invention has the following advantages, because the radio link failure decision is performed for the UE instead of the single carrier, and the problem of how to perform the radio link failure judgment under carrier aggregation is solved.
  • FIG. 1 is a schematic diagram of a carrier form of an LTE system in the prior art
  • FIG. 2 is a schematic diagram of a carrier aggregation format of an LTE-A system in the prior art
  • FIG. 3 is a flowchart of a method for determining a radio link failure according to Embodiment 1 of the present invention
  • FIG. 5 is a flowchart of a method for determining a radio link failure according to Embodiment 3 of the present invention
  • FIG. 6 is a flowchart of a method for determining a radio link failure according to Embodiment 4 of the present invention
  • FIG. 7 is a flowchart of a method for determining a radio link failure according to Embodiment 5 of the present invention
  • FIG. 8 is a flowchart of a method for determining a radio link failure according to Embodiment 6 of the present invention
  • a flowchart of a method for determining a radio link failure in the first embodiment of the present invention includes the following steps:
  • Step 301 The MAC layer of the user equipment reports a random access problem indication to the RRC layer of the user equipment based on the carrier or the carrier set of the user equipment.
  • Step 302 The RRC layer determines, according to the reporting form of the random access problem and the content of the report, whether the carrier of the user equipment has a random access problem at the MAC layer.
  • the RRC layer determines whether the carrier of the user equipment has a random access problem at the MAC layer, and specifically includes: the RRC layer acquiring and the single carrier are in the same carrier set. All member carriers, and It is determined that all component carriers in the carrier set have a random access problem at the MAC layer.
  • the RRC layer determines whether the carrier of the user equipment has a random access problem at the MAC layer, and specifically includes: the RRC layer determines that all component carriers in the carrier set have a MAC layer. Random access problem.
  • the RRC layer determines whether the carrier of the user equipment has a random access problem at the MAC layer, and specifically includes:
  • the RRC layer determines whether the single carrier is the primary carrier. If all the primary carriers of the UE have a random access problem, the RRC layer determines that all the carriers of the UE have a random access problem at the MAC layer.
  • the RRC layer determines whether the carrier of the user equipment has a random access problem at the MAC layer, if the RRC layer determines that the radio link of the carrier set of the user equipment fails, the information of the radio link failure of the carrier set is passed through a dedicated message. The network side device is notified to enable the network side device to deactivate or reconfigure the carrier set.
  • the component carriers in the carrier set have similar channel characteristics, and the channel characteristics include consecutive carriers or have the same TA (Timing Advance).
  • Step 303 When the RRC layer determines that the MAC layer random access problem occurs on all carriers of the user equipment, the RRC layer determines that the user equipment has failed the radio link.
  • the technical solution of the embodiment of the present invention has the following advantages, because the radio link failure decision is performed for the UE instead of the single carrier, and the problem of how to perform the wireless link failure decision under carrier aggregation is solved.
  • FIG. 4 it is a flowchart of a method for determining a radio link failure according to the second embodiment of the present invention, which includes the following steps. :
  • Step 401 The UE selects N random accesses on the carrier 1, but the N random accesses fail.
  • N is the maximum number of random access allowed
  • the UE is in the carrier aggregation transmission state
  • the aggregated carrier is three consecutive carriers, which are called carrier 1, carrier 2, and carrier 3.
  • the above three carriers have similar channel characteristics and have the same TA as the same carrier set.
  • the UE may elect to initiate a random access procedure on Carrier 1, Carrier 2, or Carrier 3.
  • Step 402 The MAC layer reports a random access problem to the carrier 1 of the RRC layer.
  • Step 403 The RRC layer finds that carrier 1, carrier 2, and carrier 3 are consecutive through the existing configuration information, that is, the three carriers are three carriers in the same carrier set, step 404, and the RRC layer determines that the carrier set has occurred. The random access problem, and the UE is determined to have failed the radio link.
  • the RRC layer determines that the UE has failed the radio link.
  • Step 405 The UE triggers an RRC connection reestablishment process.
  • the technical solution of the embodiment of the present invention has the following advantages, because the radio link failure decision is performed for the UE instead of the single carrier, and the problem of how to perform the wireless link failure decision under carrier aggregation is solved.
  • FIG. 5 it is a flowchart of a method for determining a radio link failure according to the third embodiment of the present invention, which includes the following steps. :
  • Step 501 The UE selects N random accesses on the carrier 1, but the N random access fails.
  • N is the maximum number of random access allowed
  • the UE is in the carrier aggregation transmission state, and the aggregated carrier is three consecutive carriers, which are called carrier 1, carrier 2, and carrier 3.
  • the above three carriers have similar channel characteristics and have the same TA as the same carrier set.
  • the UE may select carrier 1, carrier 2 or carrier. 3 initiates a random access procedure.
  • the UE may also choose to initiate random access on the carrier 1, the carrier 2, and the carrier 3.
  • the total number of random accesses is M times, and M is the maximum number of random accesses allowed, but the M times of random access fails.
  • Step 502 The MAC layer reports to the RRC layer that the carrier set where the carrier 1 is located has a random access problem.
  • Step 503 The RRC layer determines that a random access problem occurs in the carrier set, and determines that the radio link fails in the UE.
  • the RRC layer determines that the UE has failed the radio link.
  • Step 504 The UE triggers an RRC connection reestablishment process.
  • the technical solution of the embodiment of the present invention has the following advantages, because the radio link failure decision is performed for the UE instead of the single carrier, and the problem of how to perform the radio link failure decision under carrier aggregation is determined.
  • FIG. 6 it is a flowchart of a method for determining a radio link failure in the fourth embodiment of the present invention, including the following. Steps:
  • Step 601 The UE selects N random accesses on the carrier 1, but the N random access fails.
  • N is the maximum number of random accesses allowed, and the UE is in a carrier aggregation transmission state, and aggregates carrier 1, carrier 2, carrier 3, and carrier 4, where carrier 1, carrier 2, and carrier 3 are continuous carriers, and carrier 4 It is a carrier that is not continuous with the above three consecutive carriers.
  • the channel characteristics of carrier 1, carrier 2 and carrier 3 are similar, with the same TA as the same carrier set, and carrier 4 alone as the other carrier set.
  • the UE may elect to initiate a random access procedure on Carrier 1, Carrier 2, or Carrier 3.
  • Step 602 The MAC layer reports that the carrier 1 has a random access problem to the RRC layer.
  • Step 603 The RRC layer finds that carrier 1, carrier 2, and carrier 3 are consecutive through the existing configuration information, that is, the three carriers are three carriers in the same carrier set.
  • Step 604 The RRC layer determines that the carrier set has a random access problem, and the RRC layer notifies the base station of the case that the carrier set has a random access problem, but does not determine that the UE has failed the radio link.
  • the RRC layer does not determine that the UE has failed the radio link.
  • the RRC layer may also notify the base station of the carrier set in which the carrier set of carrier 1, carrier 2 and carrier 3 fails, through dedicated signaling, so that the base station performs subsequent operations, such as deactivation or reconfiguration, on the set of carriers.
  • Step 605 The MAC layer initiates random access on the carrier 4. If the random access succeeds, step 606 is performed. If the random access fails, step 607 is performed.
  • Step 606 The UE sends and receives data on the carrier 4.
  • step 606 the process can be ended.
  • Step 607 The MAC layer reports a random access problem to the carrier 4 to the RRC.
  • Step 608 The RRC layer determines that a random access problem occurs in the carrier set where the carrier 4 is located, and determines that the UE fails to generate a radio link.
  • the MAC layer reports the random access problem to the carrier 4 to the RRC layer, and the RRC layer determines that the carrier set of the carrier 4 is randomly generated according to the same method.
  • the access problem because the carrier access problem occurs on all the carriers aggregated by the UE at this time, the RRC layer of the UE may determine that the radio link failure occurs in the UE.
  • Step 609 The UE triggers an RRC connection reestablishment process.
  • the technical solution of the embodiment of the present invention has the following advantages, because the radio link failure decision is performed for the UE instead of the single carrier, and the problem of how to perform the radio link failure judgment under carrier aggregation is solved.
  • the UE is configured as a non-contiguous carrier aggregation, and the MAC layer reports the random access problem in the form of a carrier set, as shown in FIG. 7 , it is a flowchart of a method for determining a radio link failure according to Embodiment 5 of the present invention, including the following. step:
  • Step 701 The UE selects N random accesses on the carrier 1, but the N random access fails.
  • N is the maximum number of random accesses allowed, and the UE is in a carrier aggregation transmission state, and aggregates carrier 1, carrier 2, carrier 3, and carrier 4, where carrier 1, carrier 2, and carrier 3 are continuous carriers, and carrier 4 It is a carrier that is not continuous with the above three consecutive carriers.
  • the carrier characteristics of carrier 1, carrier 2 and carrier 3 are similar, with the same TA as the same carrier set, and carrier 4 alone as the other carrier set.
  • the UE may choose to initiate a random access procedure on carrier 1, carrier 2 or carrier 3.
  • Step 702 The MAC layer reports to the RRC layer that the carrier set where the carrier 1 is located has a random access problem.
  • Step 703 The RRC layer determines that the carrier set has a random access problem, and the RRC layer notifies the base station of the case that the carrier set has a random access problem, but does not determine that the UE has failed the radio link.
  • the RRC layer does not determine that the UE has failed the radio link.
  • the RRC layer may also notify the base station of the carrier set in which the carrier set of carrier 1, carrier 2 and carrier 3 fails, through dedicated signaling, so that the base station performs subsequent operations, such as deactivation or reconfiguration, on the set of carriers.
  • Step 704 The MAC layer initiates random access on the carrier 4. If the random access succeeds, step 705 is performed. If the random access fails, step 706 is performed.
  • Step 705 The UE sends and receives data on the carrier 4.
  • step 705 the process can be ended.
  • Step 706 The MAC layer reports a random access problem to the carrier 4 to the RRC.
  • Step 707 The RRC layer determines that a random access problem occurs in the carrier set where the carrier 4 is located. And the UE is determined to have a radio link failure.
  • the MAC layer reports the random access problem to the carrier 4 to the RRC layer, and the RRC layer determines that the carrier set of the carrier 4 is randomly generated according to the same method.
  • the access problem because the carrier access problem occurs on all the carriers aggregated by the UE at this time, the RRC layer of the UE may determine that the radio link failure occurs in the UE.
  • Step 708 The UE triggers an RRC connection reestablishment process.
  • the technical solution of the embodiment of the present invention has the following advantages, because the radio link failure decision is performed for the UE instead of the single carrier, and the problem of how to perform the wireless link failure decision under carrier aggregation is solved.
  • FIG. 8 it is a flowchart of a method for determining a wireless link failure according to Embodiment 6 of the present invention, including The following steps:
  • Step 801 The UE selects N random accesses on the carrier 1, but the N random access fails.
  • N is the maximum number of random access allowed
  • the UE is in the carrier aggregation transmission state, and the aggregated carriers are called carrier 1, carrier 2, and carrier 3.
  • carrier 1 is the only primary carrier of the UE.
  • the UE may choose to initiate a random access procedure on the carrier 1.
  • Step 802 The MAC layer reports a random access problem to the carrier 1 of the RRC layer.
  • Step 803 The RRC layer determines that the carrier 1 is the only primary carrier of the UE, and all the primary carriers of the UE have a random access problem.
  • Step 804 The RRC layer determines that a random access problem of the MAC layer occurs on all carriers of the UE, and determines that the radio link fails in the UE.
  • Step 805 The UE triggers an RRC connection reestablishment process.
  • the technical solution of the embodiment of the present invention has the following advantages, because the radio link failure decision is performed for the UE instead of the single carrier, and the problem of how to perform the wireless link failure decision under carrier aggregation is solved.
  • a schematic structural diagram of a device for determining a radio link failure according to Embodiment 6 of the present invention includes a MAC layer function module 910 and an RRC layer function module 920, where
  • the MAC layer function module 910 is configured to report a random access problem indication to the RRC layer function module 920 of the user equipment based on the carrier or carrier set of the user equipment.
  • the RRC layer function module 920 is configured to determine, according to the reporting form and the reported content of the random access problem reported by the MAC layer function module 910, whether the carrier of the user equipment has a random access problem at the MAC layer; A random access problem of the MAC layer occurs on all carriers of the user equipment, and the user equipment is determined to have failed the radio link.
  • the RRC layer function module 920 is specifically configured to acquire all component carriers in the same carrier set as the single carrier, and determine the carrier set. The random access problem of the MAC layer occurs in all component carriers.
  • the RRC layer function module 920 is specifically configured to determine whether the single carrier is the primary carrier, and if all the primary carriers of the UE have a random access problem, It is judged that the random access problem of the MAC layer occurs on all carriers of the UE.
  • the RRC layer function module 920 is specifically configured to determine that the MAC layer random access problem occurs on all component carriers in the carrier set.
  • the RRC layer function module 920 is further configured to: determine that a radio link failure occurs in the carrier set of the user equipment, and pass the information that the carrier set fails to generate a radio link.
  • the dedicated signaling notifies the network side device, so that the network side device deactivates or reconfigures the carrier set.
  • the component carriers in the carrier set have similar channel characteristics, and the channel characteristics include consecutive carriers or have the same TA.
  • the technical solution of the embodiment of the present invention has the following advantages, because the radio link failure decision is performed for the UE instead of the single carrier, and the problem of how to perform the wireless link failure decision under carrier aggregation is solved.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A terminal device (which may be a cell phone, a personal computer, a server, or a network device, etc.) performs the methods described in various embodiments of the present invention.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be integrated into one body or may be deployed separately, may be combined into one module, or may be further split into multiple sub-modules.

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

Abstract

La présente invention se rapporte, dans les modes de réalisation, à un procédé permettant de détecter une défaillance de liaison radio. Le procédé comprend les étapes suivantes : sur la base de la porteuse ou de l'ensemble de porteuses de l'UE, la couche de contrôle d'accès au support (MAC) d'un équipement utilisateur (UE) signale une indication d'un problème d'accès aléatoire à la couche de commande de ressources radio (RRC) dudit UE ; ladite couche de commande RRC détermine si un problème d'accès aléatoire de la couche de contrôle MAC se produit au niveau de la porteuse dudit UE selon la forme du rapport et le contenu du rapport de ladite indication d'un problème d'accès aléatoire ; lorsque ladite couche de commande RRC trouve que le problème d'accès aléatoire de la couche de contrôle MAC se produit au niveau de toutes les porteuses dudit UE, ladite couche de commande RRC détecte qu'une défaillance de liaison radio se produit audit UE. La solution technique des modes de réalisation de la présente invention a l'avantage de résoudre le problème de détection d'une défaillance de liaison radio pour une agrégation de porteuses (CA), car la détection d'une défaillance de liaison radio est effectuée pour un UE mais pas pour une simple porteuse.
PCT/CN2010/075943 2009-08-13 2010-08-12 Procédé et dispositif permettant de détecter une défaillance de liaison radio WO2011018042A1 (fr)

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CN200910091197.3A CN101998661B (zh) 2009-08-13 2009-08-13 一种判决无线链路失败的方法和装置
CN200910091197.3 2009-08-13

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