WO2015085688A1 - Procédé et système d'accès à un spectre cognitif par un système lte - Google Patents

Procédé et système d'accès à un spectre cognitif par un système lte Download PDF

Info

Publication number
WO2015085688A1
WO2015085688A1 PCT/CN2014/075056 CN2014075056W WO2015085688A1 WO 2015085688 A1 WO2015085688 A1 WO 2015085688A1 CN 2014075056 W CN2014075056 W CN 2014075056W WO 2015085688 A1 WO2015085688 A1 WO 2015085688A1
Authority
WO
WIPO (PCT)
Prior art keywords
random access
spectrum
lte
cognitive
licensed spectrum
Prior art date
Application number
PCT/CN2014/075056
Other languages
English (en)
Chinese (zh)
Inventor
周一青
刘玲
田霖
石晶林
Original Assignee
中国科学院计算技术研究所
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 中国科学院计算技术研究所 filed Critical 中国科学院计算技术研究所
Publication of WO2015085688A1 publication Critical patent/WO2015085688A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random 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
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/082—Load balancing or load distribution among bearers or channels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to an LTE protocol optimization technology, and in particular, to a method and system for accessing a cognitive frequency in an LTE system.
  • the background technology, the , and the technology can solve the contradiction between the current low utilization rate of spectrum resources and the scarcity of spectrum resources.
  • Cognitive radio technology enables unlicensed users to access the idle frequency band through perceptual and opportunistic access, which can effectively improve the utilization of existing spectrum and provide technical support for the development of future communication systems.
  • the application of cognitive radio technology to existing communication systems can change the resource shortage and utilization of the fixed spectrum management of existing communication systems through dynamic spectrum access.
  • LTE the resources allocated to LTE (such as TD-LTE) under the fixed-frequency allocation policy are limited.
  • LTE The introduction of cognitive radio technology, through the opportunistic use of other system idle spectrum resources, can expand the spectrum use range of TD-LTE, solve the problem of lack of spectrum resources, and provide sufficient spectrum support for LTE operations. Utilize the advantages of signal propagation characteristics of certain frequency bands (such as low-frequency broadcast TV bands) to obtain better communication quality. Since LTE system has wide frequency band and multi-band characteristics, the introduction of cognitive radio technology in LTE system can expand LTE.
  • the cognitive wireless user access network includes: the cognitive user applies for the access authorization network, and the authorized network allocates the temporary access code or other means to guide the cognitive user to access; and, through the cognitive The acquisition of spectrum enables cognitive users to access the cognitive network to work.
  • First technical side The case requires an authorized network to assist the cognitive user's access process, and the existing network changes are relatively large.
  • Most of the second technical solutions involve the design of cognitive wireless network architecture, which supports the operation of cognitive networks by designing multiple modules that implement cognitive functions. This scheme is based on the idle spectrum of existing networks. Acquiring and effectively utilizing to support the communication process of the cognitive network, the process of management and interaction of the network unit has been greatly changed. Summary of the invention
  • the working frequency band of the LTE system is extended to the licensed frequency band of the LTE and the available idle frequency band of other systems (hereinafter referred to as "cognitive spectrum"), and the present invention provides an LTE system connection.
  • the method for entering the cognitive spectrum includes: Step 1), the UE completes a boot process on the LTE licensed spectrum;
  • Step 2 According to the load rate of the LTE licensed spectrum, the UE that needs to perform random access is scheduled to work in cognitive spectrum or the UE operates at the LTE authorized frequency.
  • the step 2) includes: when the load rate of the LTE licensed spectrum exceeds a threshold, scheduling the UE that needs to perform random access to work in cognitive spectrum, or the UE works in the LTE licensed spectrum Otherwise, the UE works in the LTE licensed spectrum.
  • step 2) when the load rate of the LTE licensed spectrum exceeds a threshold, if the service priority is low, the UE that needs to perform random access is scheduled to work in the cognitive spectrum; If the service priority is high, the UE that needs to perform random access works in the LTE licensed spectrum.
  • the method before step 2), the method further comprises:
  • Step a) the UE initiates a random access request to the current base station
  • Step b) the random access decision module of the current base station determines the load status of the LTE licensed spectrum, and returns a random access response including the service priority setting information and the cognitive spectrum information if the load rate exceeds the threshold; otherwise, returns Standard random access response.
  • step 2) comprises:
  • Step 211 when the load rate of the LTE licensed spectrum exceeds a threshold, perform step 212); otherwise, the UE that needs to perform random access completes random access according to the existing LTE protocol, enters the CONNECTED state, starts communication, and Skip steps 212) and 213);
  • Step 212 the UE that needs to perform random access determines whether the priority of the initiating service is high or low according to the service priority setting information, and if the service priority is low, step 213); Otherwise, the UE completes random access according to the existing LTE protocol, enters the CONNECTED state to start communication, and skips step 213);
  • Step 213 The UE that needs to perform random access performs cell selection and frequency camping according to the cognitive spectrum information, enters an IDLE state, and then the UE initiates random access, completes random access, enters a CONNECTED state, and starts Communication.
  • the method before step 2), the method further includes:
  • the method before step 2), further comprises: if the load rate drops to the threshold, updating the first system message, indicating that all users no longer receive the second system message. In another embodiment, before step 2), the method further comprises: stopping the broadcasting of the second system message if the load rate drops to the threshold.
  • step 2) comprises:
  • Step 221) when the load rate of the LTE licensed spectrum exceeds a threshold, perform step 222); otherwise, the UE that needs to perform random access completes random access according to the existing LTE protocol, enters the CONNECTED state, and starts communication, and Skip step 222) and 223);
  • Step 222) The UE that needs to perform random access determines whether the priority of the initiating service is high or low. If the service priority is low, step 223) is performed; otherwise, the UE completes random access according to the existing LTE protocol, and enters CONNECTED. The state begins to communicate and skips step 223);
  • Step 223 The UE that needs to perform random access receives the second system message, performs cell selection and frequency camping according to the cognitive spectrum information in the latest second system message, enters an IDLE state, and then the UE initiates a random After accessing, after completing random access, it enters the CONNECTED state and starts communication.
  • the second system message is a new system message carrying cognitive spectrum information. In another embodiment, the second system message is an existing system message with increased cognitive spectrum information.
  • step 2) further comprises determining a priority of the UE initiating the service.
  • determining the priority of the UE initiating the service comprises:
  • step 1) includes:
  • the UE performs PLMN selection, cell search, cell selection and reselection, and frequency residing on the LTE licensed spectrum, and then enters the IDLE state.
  • a system for accessing a cognitive spectrum by an LTE system including: a startup module, configured to complete a boot process on a LTE licensed spectrum; and an admission control module, configured to determine a service priority And, according to the service priority setting and the load rate and the load threshold, scheduling the UE that needs to perform random access to perform cognitive spectrum work or the UE works in the LTE authorized spectrum.
  • the existing protocol changes are small, which is conducive to backward compatibility.
  • the UE is reasonably scheduled according to the load status and the service priority before the random access procedure, or the UE is reasonably scheduled by modifying the random access response form.
  • the LTE frequency load is heavy, some users are scheduled to the cognitive spectrum, and the working spectrum range of the LTE system is expanded to support more L TE users.
  • the licensed spectrum is a dedicated spectrum of a communication system
  • communication over the licensed spectrum is more reliable, communication quality is better, and continuity is better. Therefore, the scheme considers that the user will be scheduled to the cognitive spectrum only when the licensed spectrum load of the LTE system is heavy, and the use of the cognitive spectrum is supported under the premise that the existing protocol changes are as small as possible, and the LTE system is expanded.
  • the working spectrum ranges, but still guarantees that the communication quality is within the user's acceptance.
  • FIG. 1 is a flowchart of a method for admission control of an LTE system according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of cognitive spectrum access interaction according to an embodiment of the present invention
  • FIG. 3 is a flow chart of a method for an LTE system to access a cognitive spectrum according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of cognitive spectrum access interaction according to another embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for an LTE system to access a cognitive spectrum according to another embodiment of the present invention. detailed description
  • a user terminal performs a process of performing PLMN selection, cell search, cell selection and reselection, and camping according to initial cell selection or cell selection based on stored information, and enters IDLE. status.
  • the IDLE state is changed to the CONNECTED state.
  • the UE performs operations such as monitoring a paging channel, neighboring cell measurement and reselection, and receiving a system broadcast message.
  • the communication process can be performed after the IDLE state is changed to the CONNECTED state.
  • initial access in the IDLE state the UE receives the paging message to enter the cell, the UE that receives the handover command needs to enter the target cell, and the radio link fails to reestablish the RRC connection.
  • the uplink or downlink data arrives but the UE is not synchronized with the evolved base station (eNB, or simply the base station).
  • eNB evolved base station
  • a method for accessing a cognitive spectrum by an LT E system is provided.
  • the method sets the UE in the IDLE state to be distributed on the licensed spectrum, and the UE in the CONNE CTED state is distributed on the cognitive spectrum and the licensed spectrum.
  • the admission control when the ID LE state enters the CONNECTED state, when the authorized frequency load is light, it is considered to work in the licensed spectrum, and when the authorized spectrum load is heavy, it is considered to schedule some UEs to the cognitive spectrum.
  • the control channel and the traffic channel are simultaneously divided in the cognitive spectrum according to the LTE system.
  • the control letter can also be The track stays in the licensed spectrum, where the cognitive spectrum is only used for service transmission.
  • the terminal needs to be able to support the simultaneous operation on the cross-carrier, and is applicable to the carrier aggregation/multi-carrier scenario.
  • a single carrier scenario that is, the control channel and the traffic channel are simultaneously divided on the cognitive spectrum, and is compatible with the LTE system. If the cognitive spectrum is insufficient (required to reserve the spectrum resource as the spectrum concession, and the cognitive spectrum usage rate is counted, and the spectrum is considered to be insufficient than a certain threshold), the access is denied.
  • Figure 1 shows the admission. Flow chart of the control method.
  • the user after the user is powered on, the user first accesses the licensed spectrum. If the load is heavy, the user accesses the cognitive spectrum to work in the cognitive spectrum.
  • the existing cognitive wireless user access network technology after the user is turned on, the user can directly access the cognitive spectrum, that is, the user stays on the cognitive frequency after booting up. "Management in the RRC IDLE state and the CON NECTED state is performed.
  • the terminal Before accessing the cognitive spectrum, the terminal needs to know the information of the available idle spectrum, and then perform cell search and cell selection in the boot process according to the obtained information. .
  • the acquisition of spectrum information mainly includes methods such as spectrum sensing, database access, and cognitive pilot channel access. However, no matter which method is used to obtain the spectrum information, it will increase the additional energy consumption and time-consuming operation of the terminal.
  • the terminal resides in the cognitive frequency in the IDLE state. If there is a primary user appearing at the cognitive frequency that resides at this time, it is necessary to switch the access frequency point in time, and re-execute the operation of access and resident. Since the user needs to receive system messages, paging messages, etc. in the IDLE state, it is necessary to ensure that the terminal resides at the available frequency points. The activity of the primary user is dynamically changed, so the relinquish of the IDLE state is inevitable, and the number of times of concession It will change as the appearance of the primary user on the frequency of the host changes.
  • the present invention first accesses the licensed spectrum after the user is powered on, so that the UEs in the IDLE state are distributed on the weighted frequency, and the users in the CONNECTED state are distributed on the weighted frequency and the cognitive spectrum, avoiding direct access to The cumbersome operation of the cognitive spectrum and frequent retreats and re-accesses caused by the activity of the primary user.
  • the boot process is completed on the LTE licensed spectrum according to the existing LTE protocol, including PLMN selection, cell search, cell selection and reselection, camping, etc., and then enters the IDLE state.
  • the LTE user can perform the following operations: 1. Listening to the paging channel, 2. Measuring and reselecting the neighboring cell, 3. Receiving the system broadcast message. Then, considering the random access procedure, after the random access succeeds, the UE enters the CONNECTED state from the IDLE state, and the data transmission and the call process can be performed.
  • the user initially entering the CONNECTED state is scheduled to the cognitive spectrum or the licensed spectrum according to the admission control method shown in FIG.
  • the current base station when receiving a random access request, performs a random access response in conjunction with the base station load condition (ie, the load condition of the licensed spectrum).
  • the random access decision module is set on the base station side, and the random access is completed according to the existing LTE protocol flow when the load is light; when the load rate exceeds a certain threshold, the priority of the initiated service is comprehensively considered, according to the random access decision.
  • the service with the highest priority is scheduled on the authorized spectrum, the random access is completed according to the existing process, and the service with the lower priority is scheduled to the cognitive spectrum, and the available idle cognition is notified in the random access response message. Frequency.
  • the user performs cell search, cell selection, and random access procedures according to the received available idle cognitive spectrum message.
  • the threshold for determining the weight of the load may be calculated by the base station, and the threshold value range in which user access congestion is easily generated is counted, and the threshold is obtained within the threshold. For example, if a base station has a high access failure rate within a load rate of 85 %-90%, then a value is selected within the range as the threshold of the decision. In another embodiment, it may also be determined by a resource utilization threshold of admission control in the LTE system.
  • Random access response. 2 shows a schematic diagram of cognitive spectrum access interaction based on a modified random access response message, where "random access response" represents an existing random access response (or standard random access response), "random access” Response 2" is a service priority setting and a random access response for scheduling users to the cognitive spectrum, including, for example, cognitive spectrum information and traffic priority Set the information.
  • the base station selects which random access response message to send according to the random access decision of the random access decision module.
  • the UE After receiving the "random access response 2", the UE compares the type of the initiated service with the service priority setting information in the random access response message, and determines whether to access the licensed spectrum or access the cognitive spectrum ( Dispatching low priority traffic to cognitive spectrum). At this time, if a UE with a low priority service maliciously accesses the licensed spectrum, it will be denied access by the base station.
  • the “cognitive base station” is used to indicate access to the cognitive spectrum, in fact, the access cognitive frequency is also implemented in the current base station.
  • the priority of the service priority can be referred to the following service type:
  • the service priority setting (high priority setting and low priority setting) information in "Random Access Response 2" can be adjusted based on feedback from the licensed spectrum load condition. For example, if the licensed spectrum is not idle (eg, the load rate is 1), then all newly accessed services are considered low priority and will be scheduled on the cognitive spectrum; if the load rate is at the threshold (eg to 1) Between, then you can set the top 1-3 business with higher ordering as high priority business.
  • Figure 3 illustrates the process of accessing a cognitive spectrum or licensed spectrum based on modifications to the random process, including modifying the access response message and adding a random access decision module, including the following steps:
  • the random access decision module on the base station side determines whether the load rate of the licensed spectrum is greater than the threshold value, if it is greater than 3), otherwise executes 7);
  • the base station sends a random access response 2 (RAR2) to the UE;
  • the UE compares and decides the service priority setting information in the random access response 2 according to the type of the initiated service; if the originating service is a high priority service, it executes 8), otherwise executes 5)
  • the UE performs cell selection and frequency reservation according to the available cognitive spectrum information carried in the RAR2, and enters the IDLE state;
  • the base station sends a random access response to the UE
  • the UE completes the subsequent random access procedure according to the existing LTE protocol, and enters the CONNECTED Status, start communication. Second, modify the system message SI before random access
  • the user is scheduled in the cognitive spectrum or the licensed spectrum based on the load condition of the licensed spectrum and the service priority of the UE.
  • the load is light (ie, / ⁇ ⁇ )
  • the network side does not guide the terminal access network, and the user at this time can access the 4 authorized frequency.
  • the system message SIB 1 is updated, the message content is added in SIB 1, all UEs are told to receive the system message SIB 17, and the new system message SIB 17 is started to be broadcast.
  • the SIB 17 carries cognitive spectrum related information for use by the LTE system.
  • the idle cognitive spectrum information in the SIB 17 message needs to be updated periodically (e.g., according to a spectrum detection period, such as 200 ms). For users who do not need to perform random access, they do not need to pay attention to this system message. For users who need to perform random access, they need to receive the SIB 17 message and perform frequency access according to the latest SIB 17 message.
  • a user who initiates a low priority service for example, a user who requests an access service with a low latency priority or a non-real time service or an initial access in an IDLE state, needs to receive the SIB 17, and follow The available frequency point information in the SIB 17 is re-processed by frequency point scanning, cell selection, etc., and then randomly accessed at the selected frequency point to enter the CONNECTED state.
  • access to the licensed spectrum For users requesting access delays with high priority or real-time services (ie, users of high-priority services), access to the licensed spectrum.
  • the broadcast SIB 17 is stopped or the SIB 1 is updated to inform the user that the SIB 17 is no longer being received.
  • the licensed spectrum resources are sufficient, and only random access to the licensed spectrum is considered.
  • Table 1 Figure 5 illustrates the process of accessing a cognitive spectrum or licensed spectrum based on modifying system messages, including the following steps:
  • the UE enters the IDLE state; 2) the UE receives system messages, paging messages, and the like;
  • Update system message SIB 1 instruct all UEs to receive SIB 17; return to step 3) after a while;
  • the UE receives the SIB 17 and performs demodulation to acquire the cognitive frequency "related information;
  • the UE performs operations such as cell selection and frequency camping according to the cognitive spectrum information carried in the SIB17, and enters an IDLE state;
  • the UE entering the IDLE state then initiates random access, enters the CONNECTED state after completing the random access, starts communication, returns to 6) or ends the process.
  • the UE continues to receive system messages, paging messages, and the like;
  • the UE initiates a random access procedure on the camped frequency point (ie, the licensed spectrum);
  • the new SIB17 is mainly used to broadcast available frequency information, and it is also considered to add this information to existing SIB messages.
  • the message is added to SIB3.
  • the SIB3 mainly carries the cell reselection related information, including the reselection information of the system information block, including common information of the same frequency, different frequency and different systems, frequency information of the service, and information of partial co-frequency cell reselection.
  • the cognitive spectrum information is added to SIB3, and a signaling domain is added to SIB3, as shown in Table 2.
  • the LTE system provided by the present invention is required to access the cognitive spectrum.
  • the method requires the following modifications to the LTE protocol:
  • La Design the SIB17 message format, the content of the message and its organization and update mechanism.
  • SIB1 adding a signaling domain indicating SIB3 reception, SIB3 update period, etc., in SIB1, that is, adding SIB3 scheduling information in SIB1, so that the UE receives related information at the correct location, and also provides system messages. The information is changed so that the UE updates the corresponding system broadcast information.
  • a system for accessing a cognitive spectrum by an LTE system comprising a startup module and a scheduling module.
  • the startup module is used by the UE to complete the boot process on the LTE licensed spectrum.
  • the admission control module is configured to determine the service priority, and based on the service priority setting and the load rate and the load threshold, the UE that needs to perform random access is scheduled to work in cognitive spectrum or the UE works in the LTE licensed spectrum.

Abstract

La présente invention fournit un procédé et un système pour accéder à un spectre cognitif par un système LTE. Le procédé pour accéder à un spectre cognitif par un système LTE comprend : la mise en oeuvre, par un UE, d'un processus de démarrage sur un spectre autorisé LTE ; et, lorsqu'un taux de charge du spectre autorisé LTE dépasse un seuil, l'envoi de l'UE nécessitant un accès aléatoire vers un spectre cognitif pour fonctionner, ou l'UE fonctionnant sur le spectre autorisé LTE ; autrement, le fonctionnement de l'UE sur le spectre autorisé LTE. En optimisant un protocole, la présente invention fournit une solution pour utiliser une technologie radio cognitive dans un système LTE, et la solution est compatible en arrière avec le système LTE ; la qualité de communication est garantie, et la plage spectrale de travail du système LTE est étendue, ce qui évite des opérations complexes lorsqu'un utilisateur quitte et accède de nouveau fréquemment, et permet d'atteindre l'objectif d'économie d'énergie.
PCT/CN2014/075056 2013-12-09 2014-04-10 Procédé et système d'accès à un spectre cognitif par un système lte WO2015085688A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310659678.6A CN103596288B (zh) 2013-12-09 2013-12-09 一种lte系统接入认知频谱的方法及系统
CN201310659678.6 2013-12-09

Publications (1)

Publication Number Publication Date
WO2015085688A1 true WO2015085688A1 (fr) 2015-06-18

Family

ID=50086217

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/075056 WO2015085688A1 (fr) 2013-12-09 2014-04-10 Procédé et système d'accès à un spectre cognitif par un système lte

Country Status (2)

Country Link
CN (1) CN103596288B (fr)
WO (1) WO2015085688A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113891491A (zh) * 2021-11-18 2022-01-04 中国航空无线电电子研究所 一种链路接入方法及装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103596288B (zh) * 2013-12-09 2017-04-12 中国科学院计算技术研究所 一种lte系统接入认知频谱的方法及系统
CN105264968B (zh) 2014-04-29 2019-10-01 华为技术有限公司 一种随机接入的装置及方法
CN105450560B (zh) * 2014-08-14 2019-02-12 华为技术有限公司 一种信道反馈传输的方法
WO2016049915A1 (fr) * 2014-09-30 2016-04-07 宇龙计算机通信科技(深圳)有限公司 Procédé de transmission de données, système de transmission, procédé de commande, système de commande et équipement
EP3248413A1 (fr) * 2015-01-22 2017-11-29 Intel IP Corporation Communication d'informations de régulation de congestion
EP3703338A4 (fr) * 2017-11-30 2020-10-28 Huawei Technologies Co., Ltd. Appareil et procédé de transmission de message de données

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101478758A (zh) * 2008-12-26 2009-07-08 北京邮电大学 一种动态频谱分配的方法和系统
CN102045775A (zh) * 2011-01-07 2011-05-04 哈尔滨工程大学 一种认知无线电网络频谱切换方法
CN102843697A (zh) * 2011-06-22 2012-12-26 电信科学技术研究院 异系统间频谱共享情况下的干扰抑制方法和设备
CN103596288A (zh) * 2013-12-09 2014-02-19 中国科学院计算技术研究所 一种lte系统接入认知频谱的方法及系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101330461B (zh) * 2008-06-18 2011-05-18 中国科学技术大学 基于已有蜂窝通信信令传输实现频谱空洞有效利用的方法
CN102271021B (zh) * 2010-06-02 2014-09-03 华为技术有限公司 协同频谱感知方法、基站和终端
CN102857973A (zh) * 2011-06-30 2013-01-02 中兴通讯股份有限公司 一种认知无线电系统资源重配的方法及系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101478758A (zh) * 2008-12-26 2009-07-08 北京邮电大学 一种动态频谱分配的方法和系统
CN102045775A (zh) * 2011-01-07 2011-05-04 哈尔滨工程大学 一种认知无线电网络频谱切换方法
CN102843697A (zh) * 2011-06-22 2012-12-26 电信科学技术研究院 异系统间频谱共享情况下的干扰抑制方法和设备
CN103596288A (zh) * 2013-12-09 2014-02-19 中国科学院计算技术研究所 一种lte系统接入认知频谱的方法及系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113891491A (zh) * 2021-11-18 2022-01-04 中国航空无线电电子研究所 一种链路接入方法及装置
CN113891491B (zh) * 2021-11-18 2023-12-22 中国航空无线电电子研究所 一种链路接入方法及装置

Also Published As

Publication number Publication date
CN103596288B (zh) 2017-04-12
CN103596288A (zh) 2014-02-19

Similar Documents

Publication Publication Date Title
US11863999B2 (en) Apparatus and methods for interference detection and handling within unlicensed spectrum
WO2015085688A1 (fr) Procédé et système d'accès à un spectre cognitif par un système lte
US9642128B2 (en) Method and apparatus for performing device-to-device communication in wireless communication system
US8848700B2 (en) Method for device-to-device communication based on cellular telecommunication system
US9107202B2 (en) Methods, apparatuses and computer program products for providing coordination of device to device communication
WO2021052101A1 (fr) Procédé et dispositif de transmission de données multicellule
RU2619066C1 (ru) Система и способ выделения периодических ресурсов
WO2020248202A1 (fr) Procédé, dispositif et système de configuration de ressource de liaison latérale et support de stockage lisible
WO2014012453A1 (fr) Procédé et appareil pour une recherche de cellule dans un système de détection
JP2017527182A (ja) デバイスツーデバイスリソースプールの設定方法、装置及びシステム
US20220279403A1 (en) Information transmission method and apparatus, storage medium and electronic apparatus
TWI688293B (zh) 傳送及取得系統資訊的方法
US11375410B2 (en) Method and apparatus for obtaining configuration information, device, storage medium, and system
WO2021226760A1 (fr) Procédé et appareil de détection partielle, dispositif terminal et support de stockage
WO2009046663A1 (fr) Procédé, système et dispositif de mappage de bloc d'informations système
US20130295978A1 (en) Method and apparatus for scheduling radio frequency resources in a multiple-radio-stacks context
WO2023130471A1 (fr) Procédé et appareil d'accès à une cellule, et dispositif et support de stockage lisible
WO2020029825A1 (fr) Procédé de planification de ressources, terminal, et dispositif de réseau
WO2010127481A1 (fr) Procédé, système et dispositif de lecture de messages de diffusion
WO2020253228A1 (fr) Procédé et dispositif de gestion de cellules
RU2687162C1 (ru) Способ передачи данных, точка доступа и станция
US10757686B2 (en) Method and user equipment for requesting common information from an access node
WO2020223977A1 (fr) Procédé et appareil de commande d'accès, et support de stockage lisible
WO2021026929A1 (fr) Procédé et appareil de communication
WO2014176786A1 (fr) Procédé d'attribution de ressource réseau, procédé pour accéder à un dispositif cible dans un réseau, station de base et dispositif terminal

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14869411

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14869411

Country of ref document: EP

Kind code of ref document: A1