CN106304375B - Wireless communication method - Google Patents

Wireless communication method Download PDF

Info

Publication number
CN106304375B
CN106304375B CN201510281912.5A CN201510281912A CN106304375B CN 106304375 B CN106304375 B CN 106304375B CN 201510281912 A CN201510281912 A CN 201510281912A CN 106304375 B CN106304375 B CN 106304375B
Authority
CN
China
Prior art keywords
user equipment
message
base station
channel
threshold value
Prior art date
Application number
CN201510281912.5A
Other languages
Chinese (zh)
Other versions
CN106304375A (en
Inventor
刘建国
韩锋
孟艳
陶涛
谷俊嵘
武卓
王钧
Original Assignee
上海诺基亚贝尔股份有限公司
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 上海诺基亚贝尔股份有限公司 filed Critical 上海诺基亚贝尔股份有限公司
Priority to CN201510281912.5A priority Critical patent/CN106304375B/en
Publication of CN106304375A publication Critical patent/CN106304375A/en
Application granted granted Critical
Publication of CN106304375B publication Critical patent/CN106304375B/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/12Dynamic Wireless traffic scheduling ; Dynamically scheduled allocation on shared channel
    • H04W72/1205Schedule definition, set-up or creation
    • H04W72/1226Schedule definition, set-up or creation based on channel quality criteria, e.g. channel state dependent scheduling
    • H04W72/1231Schedule definition, set-up or creation based on channel quality criteria, e.g. channel state dependent scheduling using measured or perceived quality
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/002Transmission of channel access control information
    • H04W74/006Transmission of channel access control information in the downlink, i.e. towards the terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10Dynamic resource partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation
    • H04W72/08Wireless resource allocation where an allocation plan is defined based on quality criteria
    • H04W72/085Wireless resource allocation where an allocation plan is defined based on quality criteria using measured or perceived quality
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/12Dynamic Wireless traffic scheduling ; Dynamically scheduled allocation on shared channel
    • H04W72/14Dynamic Wireless traffic scheduling ; Dynamically scheduled allocation on shared channel using a grant or specific channel

Abstract

A method for determining a free channel sensing threshold value in user equipment of an LTE communication system, wherein the free channel is an unlicensed carrier channel, and the method comprises the following steps: the user equipment receives a first message sent from a base station, wherein the first message contains a first adjusting value used for adjusting the threshold value; and the user equipment determines the threshold value according to the first adjusting value and the maximum transmitting power of the user equipment.

Description

wireless communication method

Technical Field

The present invention relates to the field of communications technologies, and in particular, to the field of wireless communications technologies.

Background

In the field of wireless communication, generally, a traditional deployment method is that a system operates in a licensed band (licensed band), that is, the entire spectrum resource is reserved for the system. Typically, LTE communication systems operate using licensed frequency bands.

however, as wireless services further increase, the capacity and frequency band requirements for wireless communication systems also increase. In this case, the licensed band resource of the LTE system is relatively insufficient. Therefore, one of the recent research hotspots in the LTE field is how to utilize the resources of the unlicensed frequency band to offload the high-speed data traffic. This scheme is called as an LTE (Long term evolution) in Unlicensed spectrum (LTE-U) system

For example, in a typical scenario, the LTE system uses the frequency bands of the WiFi system. I.e. the situation where cells of the LTE system and cells of the WiFi system at least partly co-exist in geographical location. In this case, if the LTE system can use the WiFi frequency band to perform traffic offloading at some high-load moments, it is obvious that the performance of the system can be greatly improved, thereby effectively coping with high-load application scenarios.

obviously, under the coexistence of LTE and WiFi systems, it is the most direct choice to utilize the authorized carrier of LTE system to assist the Access of the unlicensed carrier of WiFi system, so that the Licensed-Assisted Access (LAA) has become a hot spot in the mobile communication field recently.

By utilizing the LAA technology, the existing flow of the LTE system can be furthest used for realizing Carrier Aggregation (CA) scheduling of authorized carriers and unauthorized carriers. However, in order to be compatible with the system of the unlicensed carrier, some new mechanisms need to be introduced, and one of the first problems is how to implement Listen Before Transmission (LBT) of the unlicensed carrier in the LTE-LAA system.

Typically, before a User Equipment (UE) tries to transmit data on a certain unlicensed carrier Channel, it must first determine that the Channel is not occupied by other devices, and therefore, Clear Channel Association (CCA) operation must be performed to determine whether the Channel is currently idle by measuring the current transmit power level of the Channel. Specifically, whether the UE can occupy the channel is determined by comparing the measured transmit power level with a CCA threshold (CCAthreshold, abbreviated as CCA TL) of the UE, and obviously, whether the UE can occupy the channel is closely related to a setting value of CCA TL of the UE. Considering the difference in the transmission power of different devices, the existing technical specifications specify the setting value for CCA TL as follows:

For the device with the emission Power equal to or more than 23dBm Effective omnidirectional radiation Power (EIRP), the CCA TL value is set as the lower limit value of the system, namely-73 dBm/MHz;

For devices with transmit power below 23dBm EIRP, the CCA TL value is determined by the following equation (1):

TL=-73dBm/MHz+(23dBm-PH)/(1MHz) (1)

Wherein P isHRepresents the most of the UEA large transmission power.

Obviously, the method considers the equipment with smaller compensation transmitting power, avoids the occurrence of high-power equipment obtaining higher access opportunity, and ensures the fairness of channel access. Is successful in existing WiFi systems.

however, the situation is different when considering the scenario of LTE-LAA. Firstly, the WiFi system mainly considers data services, while the LTE system can carry multiple services, the requirements of the same UE for channel performance are actually different when carrying different services, and determining the CCA TL value only according to the transmission power inevitably results in that channels available under some services are not available for other services, thereby resulting in wrong channel occupation. More importantly, the channel occupation of the WiFi system is full bandwidth, and for the LTE system of frequency division multiplexing, the UE may only use a partial frequency band of the unlicensed carrier channel, and the measurement of CCA operation performed by the UE is the aggregate value of the transmission powers of all devices on the entire frequency band, so that the actual channel occupation situation cannot be accurately reflected as a result. Thirdly, each node in the WiFi system is equal, while the LTE system has a requirement for scheduling access opportunities of each UE separately because of centralized control of the base station.

It is therefore an object of the present invention to find a new method of determining the value of CCA TL; the method needs to enable the UE to meet different service requirements when performing CCA operation under the condition of LTE-LAA; and the system is compatible with frequency division multiplexing, and can meet the requirement of centralized scheduling of a base station.

Disclosure of Invention

To solve the above problems in the prior art, the present invention proposes a new method for determining the CCA TL value. The method for sending the TL adjustment value to the UE by the base station ensures that the base station can control the CCA operation of the UE according to the actual situation.

Specifically, according to a first aspect of the present invention, a method for determining an idle channel sensing threshold in a user equipment of an LTE communication system is provided, where the idle channel is an unlicensed carrier channel, and the method includes: the user equipment receives a first message sent from a base station, wherein the first message contains a first adjusting value used for adjusting the threshold value; and the user equipment determines the threshold value according to the first adjusting value and the maximum transmitting power of the user equipment.

preferably, the second step further includes determining the threshold value according to the bandwidth of the idle channel sensing operation.

More preferably, the second step further comprises determining the threshold value according to the following formula:

TL=max(TLmin,min(TLmax,-73dBM+(23dBm-PH)+10×log10B+ΔTL))

wherein TL represents the threshold value, TLminRepresents the lower limit of the threshold value, TLmaxRepresents the upper limit of said threshold value, PHRepresents the maximum transmission power of the user equipment, B represents the bandwidth of the idle channel sensing operation, DeltaTLrepresenting the first adjustment value.

More preferably, the bandwidth of the idle channel sensing operation is the bandwidth of the unlicensed carrier channel.

More preferably, the bandwidth of the idle channel sensing operation is the bandwidth allocated to the user equipment by the base station.

More preferably, the bandwidth of the idle channel sensing operation is the bandwidth allocated to the user equipment by the base station.

More preferably, the first message and the second message are radio resource control messages.

more preferably, the first message and the second message are layer 1 messages.

According to a second aspect of the present invention, a method for assisting a user equipment in determining a free channel sensing threshold in a base station of an LTE communication system is provided, where the free channel is an unlicensed carrier channel, and the method includes: the base station determines a first adjustment value for adjusting the threshold value; and the base station sends a first message to the user equipment, wherein the first message comprises the first adjustment value.

Preferably, the first step further includes the base station determining the first adjustment value according to the following rule: when the access opportunity of the user equipment needs to be improved, increasing the first adjusting value; and when the link performance of the user equipment needs to be improved, reducing the first adjustment value.

Preferably, after the second step, the base station further sends a second message to the user equipment, where the second message includes the bandwidth of the idle channel sensing operation.

More preferably, the first message and the second message are radio resource control messages.

More preferably, the first message and the second message are layer 1 messages.

according to a third aspect of the present invention, an apparatus for determining a clear channel sensing threshold in a user equipment of an LTE communication system is provided, where the clear channel is an unlicensed carrier channel, and the apparatus includes: a receiving module, configured to receive a first message sent from a base station by the user equipment, where the first message includes a first adjustment value used to adjust the threshold value; a determining module, configured to determine, by the user equipment, the threshold according to the first adjustment value and the maximum transmission power of the user equipment.

According to a fourth aspect of the present invention, an apparatus for assisting a user equipment in determining a free channel sensing threshold in a base station of an LTE communication system is provided, where the free channel is an unlicensed carrier channel, and the apparatus includes: a determining module, configured to determine, by the base station, a first adjustment value for adjusting the threshold value; a sending module, configured to send, by the base station, a first message to the user equipment, where the first message includes the first adjustment value.

in the invention, the base station sends the TL adjustment value to the UE, so that the base station can adjust the CCA operation of the UE according to the actual requirement, can be set differently according to the business situation and can also be used for adjusting the access probability, and the practical situation of the frequency division multiplexing system is met by introducing the frequency range of the CCA operation into the CCA TL value calculation method, thereby achieving the aim of the invention.

Drawings

other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments thereof, which proceeds with reference to the accompanying drawings.

fig. 1 shows a flow chart of a method of determining a clear channel sensing threshold in a user equipment of an LTE communication system according to the invention;

Fig. 2 shows a flow chart of a method for assisting a user equipment in determining a clear channel perception threshold in a base station of an LTE communication system according to the invention;

fig. 3 shows a block diagram of an apparatus for determining a clear channel sensing threshold in a user equipment of an LTE communication system according to the present invention;

fig. 4 shows a block diagram of an apparatus for assisting a user equipment in determining a clear channel perception threshold in a base station of an LTE communication system according to the present invention.

Wherein the same or similar reference numerals indicate the same or similar step features or means/modules.

Detailed Description

In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings illustrate, by way of example, specific embodiments in which the invention may be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments according to the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

First, according to the application scenario of the present invention, there is an area covered by the LTE communication system, which includes at least one base station and a UE. In addition, other unlicensed carriers exist in the area, which may also be used by other LTE or WiFi communication systems.

When the base station considers that the UE needs to use the unlicensed carrier channel for transmission, the UE may perform CCA operation on the unlicensed carrier channel to confirm whether the unlicensed carrier channel is free for use at this time. The result of the CCA operation is to determine whether the channel is clear by comparing the measured transmit power value with the CCA TL value. Therefore, firstly, the UE needs to determine the CCA TL value used for this CCA operation, and according to the method of the present invention, the determination of the CCA TL value needs to be adjusted according to the indication of the base station, in addition to considering the maximum transmission power of the UE, typically the maximum transmission power of the UE in a burst transmission, according to the method of the prior art, which is hereinafter referred to as a first adjustment value. And after receiving the first message, the UE acquires the first adjustment value and determines the CCA TL value of the CCA operation according to the maximum transmission power of the UE. The above is the basic solution of the present invention. Through the first adjustment value determined by the base station, the base station can realize various control modes and meet the requirements of various services and scheduling, thereby achieving the aim of the invention.

Based on the above scheme, the present invention further provides that a concept of bandwidth may be introduced in the CCA operation, that is, the bandwidth for CCA operation may also be considered in the method for determining the CCA TL value, so that a more accurate channel sensing result may be obtained in a frequency division multiplexing system, thereby avoiding breaking fairness of channel access under the condition of LTE-FDD system access.

On this basis, according to one embodiment of the present invention, a method of determining a CCA TL value is presented. Specifically, the threshold value is determined according to the following formula (2):

TL=max(TLmin,min(TLmax,-73dBM+(23dBm-PH)+10×log10B+ΔTL)) (2)

Wherein the content of the first and second substances,TL represents the threshold value, TLminrepresents the lower limit of the threshold value, TLmaxThe value of the upper/lower limit may be predetermined by the system, or configured by a base station through radio resource Control (RRC for short) signaling, so as to limit the determined threshold within a reasonable range. PHrepresents the maximum transmit power of the UE, B represents the bandwidth of the CCA operation, ΔTLRepresenting the first adjustment value.

Further, B in equation (2), the value of the bandwidth over which the CCA operates, may be determined in several ways.

For example, the value of B may be the bandwidth of the unlicensed carrier channel, that is, the CCA operation is performed on the entire channel frequency band, which is closest to the prior art and may be applied to a time division multiplexing system.

For another example, the value of B may be a bandwidth allocated to the UE by the base station through the resource allocation message, which is typically applied to a frequency division multiplexing system, so that the UE can perform channel sensing on the bandwidth to be used, thereby obtaining the most accurate result.

the value of B may also be explicitly indicated to the UE by the base station through a second message, which is mainly to give a specific bandwidth range for the purpose of flexible scheduling by the base station, so as to implement various centralized control functions at the base station side.

Without loss of generality, the first message and the second message in the above embodiments may be RRC signaling messages or layer 1(layer 1) messages.

Fig. 1 shows a flow chart for determining a CCA TL value according to the above embodiment, including:

S11, the user equipment receives a first message sent from a base station, wherein the first message comprises a first adjusting value used for adjusting the threshold value;

And S12, the user equipment determines the threshold value according to the first adjustment value and the maximum transmission power of the user equipment.

correspondingly, according to another embodiment of the invention, a method for assisting in determining a CCA TL value in a base station of an LTE communication system is provided. Specifically, the method comprises the following steps:

The base station determines the first adjustment value mentioned above and sends the first adjustment value to the UE through a first message.

Further, the base station should determine the first adjustment value according to the following principle:

1. and if the probability of accessing the unlicensed carrier channel by the UE needs to be improved, increasing the first adjustment value. It can be seen from formula (2) that the CCATL value of the UE is increased at this time, that is, the UE is allowed to access the channel even when the transmission power in the channel is measured to be high, so that the access delay performance of the UE is improved to meet the requirement of real-time service.

2. The first adjustment value is decreased if needed to improve the link performance of the UE. It can be seen from the formula (2) that the CCA TL value of the UE is reduced at this time, that is, the UE is required to perform channel sensing in a larger range, so as to ensure that the channel is also unoccupied in the larger range, further avoiding co-channel interference, and thus improving link performance. In addition, other devices may also be provided with more access opportunities.

Similarly, the base station may then send a second message to the UE to inform of the specific value range of the CCA operation bandwidth B.

Also without loss of generality, the first message and the second message in the above embodiments may be RRC signaling messages or layer 1(layer 1) messages.

Fig. 2 shows a flow chart of activating Scell according to the above embodiment, including:

S21, the base station determines a first adjusting value for adjusting the threshold value;

S22, the base station sends a first message to the user equipment, wherein the first message comprises the first adjusting value.

The following describes the apparatus corresponding to the above method provided by the present invention with reference to the drawings, and the unit/device features thereof are corresponding to the step features in the above method, which will be simplified.

fig. 3 shows an apparatus 30 for determining a clear channel sensing threshold in a UE of an LTE communication system according to the present invention, the apparatus comprising:

A receiving module 3001, configured to receive, by the user equipment, a first message sent from a base station, where the first message includes a first adjustment value used to adjust the threshold value;

A determining module 3002, configured to determine, by the user equipment, the threshold according to the first adjustment value and the maximum transmission power of the user equipment.

Fig. 4 shows an apparatus 40 for assisting a UE in determining a clear channel perception threshold in a base station of an LTE communication system according to the present invention, the apparatus comprising:

A determining module 4001, configured to determine, by the base station, a first adjustment value for adjusting the threshold value;

A sending module 4002, configured to send, by the base station, a first message to the user equipment, where the first message includes the first adjustment value.

While embodiments of the present invention have been described above, the present invention is not limited to a particular system, device, and protocol, and various modifications and changes may be made by those skilled in the art within the scope of the appended claims.

Other variations to the disclosed embodiments can be understood and effected by those skilled in the art from a study of the specification, the disclosure, the drawings, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. In the present invention, "first" and "second" merely indicate names and do not represent order relationships. In practical applications of the invention, one element may perform the functions of several technical features recited in the claims. Any reference signs in the claims shall not be construed as limiting the scope.

Claims (13)

1. A method for determining a free channel sensing threshold value in user equipment of an LTE communication system, wherein the free channel is an unlicensed carrier channel, and the method comprises the following steps:
a. The user equipment receives a first message sent from a base station, wherein the first message contains a first adjusting value used for adjusting the threshold value;
b. and the user equipment determines the threshold value according to the first adjusting value, the maximum transmitting power of the user equipment and the bandwidth of the idle channel sensing operation.
2. The method of claim 1, wherein step b further comprises determining the threshold value according to the following formula:
TL=max(TLmin,min(TLmax,-73dBM+(23dBm-PH)+10×log10B+ΔTL))
Wherein TL represents the threshold value, TLminRepresents the lower limit of the threshold value, TLmaxrepresents the upper limit of said threshold value, PHrepresents the maximum transmission power of the user equipment, B represents the bandwidth of the idle channel sensing operation, DeltaTLrepresenting the first adjustment value.
3. the method of claim 1, wherein a bandwidth of the clear channel sensing operation is a bandwidth of the unlicensed carrier channel.
4. The method of claim 1, wherein a bandwidth of the clear channel aware operation is a bandwidth allocated to the user equipment by the base station.
5. The method of claim 1, wherein a bandwidth of the clear channel aware operation is determined by the base station and signaled to the user equipment via a second message.
6. The method of claim 5, wherein the first message and the second message are radio resource control messages.
7. The method of claim 5, wherein the first message and the second message are layer 1 messages.
8. A method for assisting user equipment in determining a free channel perception threshold value in a base station of an LTE communication system, wherein the free channel is an unlicensed carrier channel, and the method comprises the following steps:
A. the base station determines a first adjustment value for adjusting the threshold value;
B. the base station sends a first message to the user equipment, wherein the first message comprises the first adjustment value;
C. And the base station sends a second message to the user equipment, wherein the second message contains the bandwidth of the idle channel sensing operation.
9. The method of claim 8, wherein in the step a, the base station determines the first adjustment value according to the following rule:
When the access opportunity of the user equipment needs to be improved, increasing the first adjusting value;
And when the link performance of the user equipment needs to be improved, reducing the first adjustment value.
10. The method of claim 8, wherein the first message and the second message are radio resource control messages.
11. The method of claim 8, wherein the first message and the second message are layer 1 messages.
12. an apparatus for determining a clear channel sensing threshold in a user equipment of an LTE communication system, wherein the clear channel is an unlicensed carrier channel, the apparatus comprising:
A receiving module, configured to receive a first message sent from a base station by the user equipment, where the first message includes a first adjustment value used to adjust the threshold value;
a determining module, configured to determine, by the user equipment, the threshold according to the first adjustment value, the maximum transmission power of the user equipment, and the bandwidth of the idle channel sensing operation.
13. an apparatus for assisting a user equipment in determining a clear channel perception threshold in a base station of an LTE communication system, wherein the clear channel is an unlicensed carrier channel, the apparatus comprising:
A determining module, configured to determine, by the base station, a first adjustment value for adjusting the threshold value;
A sending module, configured to send, by the base station, a first message and a second message to the user equipment, where the first message includes the first adjustment value, and the second message includes a bandwidth of the idle channel sensing operation.
CN201510281912.5A 2015-05-28 2015-05-28 Wireless communication method CN106304375B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510281912.5A CN106304375B (en) 2015-05-28 2015-05-28 Wireless communication method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510281912.5A CN106304375B (en) 2015-05-28 2015-05-28 Wireless communication method

Publications (2)

Publication Number Publication Date
CN106304375A CN106304375A (en) 2017-01-04
CN106304375B true CN106304375B (en) 2019-12-13

Family

ID=57635814

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510281912.5A CN106304375B (en) 2015-05-28 2015-05-28 Wireless communication method

Country Status (1)

Country Link
CN (1) CN106304375B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110120830A (en) * 2018-02-07 2019-08-13 上海朗帛通信技术有限公司 A kind of base station, method for wireless communications and device in user equipment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014209425A1 (en) * 2013-05-06 2014-12-31 Intel Corporation Techniques for providing flexible clear channel assessment detection thresholds in a wireless network
WO2015038930A1 (en) * 2013-09-13 2015-03-19 Interdigital Patent Holdings, Inc. Clear channel assessment (cca) threshold adaptation method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103220065B (en) * 2012-01-18 2018-02-06 中兴通讯股份有限公司 The method of adjustment and device of clear channel assessment threshold
CN102769912B (en) * 2012-07-16 2015-01-21 北京星网锐捷网络技术有限公司 Message transmission method and device applied to WLAN (Wireless Local Area Network) as well as network equipment
US9622262B2 (en) * 2013-05-03 2017-04-11 Qualcomm Incorporated Transmit opportunity (TXOP) based channel reuse
KR101686579B1 (en) * 2013-05-24 2016-12-14 퀄컴 인코포레이티드 Transmit opportunity (txop) based channel reuse
US9717071B2 (en) * 2013-08-16 2017-07-25 Qualcomm Incorporated Uplink procedures for LTE/LTE-A communication systems with unlicensed spectrum
US9763262B2 (en) * 2013-11-01 2017-09-12 Qualcomm Incorporated Wireless communications deferral based on transmission opportunity

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014209425A1 (en) * 2013-05-06 2014-12-31 Intel Corporation Techniques for providing flexible clear channel assessment detection thresholds in a wireless network
WO2015038930A1 (en) * 2013-09-13 2015-03-19 Interdigital Patent Holdings, Inc. Clear channel assessment (cca) threshold adaptation method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Support of UL transmission for LAA;Huawei等;《3GPP TSG RAN WG1 Meeting #80bis R1-151302》;20150410;第2节 *

Also Published As

Publication number Publication date
CN106304375A (en) 2017-01-04

Similar Documents

Publication Publication Date Title
US10264568B2 (en) Beam configuration method, base station, and user equipment
US10149339B2 (en) Base station, user equipment and methods for random access
US10321294B2 (en) Signaling for proximity services and D2D discovery in an LTE network
US20200084673A1 (en) Methods And Apparatus For Opportunistic Radio Resource Allocation In Multi-Carrier Communication Systems
US9788186B2 (en) Signaling for proximity services and D2D discovery in an LTE network
US9332556B2 (en) White space access in mobile communication networks
JP6438496B2 (en) Scheduling communication resources for inter-device (D2D) communication in unlicensed frequency bands
US20190082355A1 (en) Method and device for configuring cell in wireless communication system
US9515787B2 (en) Wireless communication scheduling on shared spectra
US20160226639A1 (en) System and methods for support of frequency hopping for ues with reduced bandwidth support
EP3131356B1 (en) Methods and devices for scheduling unlicensed spectrum
US8891467B2 (en) Dynamic bandwidth adjustment in flexible bandwidth systems
EP3162131B1 (en) Improving cca clearance in unlicensed spectrum
US9031017B2 (en) Power control for LTE deployment in unlicensed band
EP2700275B1 (en) Methods and apparatus for controlling interference from peer discovery in wwan
US9131470B2 (en) Resource allocation in a coexistence system
US20170006632A1 (en) Wifi virtual carrier sense for lte/wifi co-channel coordination
US9516551B2 (en) Interference mitigation of D2D communications in different coverage scenarios
JP5272074B2 (en) Mobile communication system, radio base station, and control method
US10051661B2 (en) Method and apparatus for communicating using unlicensed bands in mobile communication system
KR101892121B1 (en) A method and apparatus for assisting inter-terminal communication in a wireless communication system supporting inter-terminal communication
EP3105967B1 (en) Cell change based on uplink configuration
EP3082370B1 (en) Network controller, site and method for establishing protection period
US8892113B2 (en) Coordinated evacuation of spectrum
US9432818B2 (en) Controlling communication devices

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai

Applicant after: Shanghai NOKIA Baer Limited by Share Ltd

Address before: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai

Applicant before: Shanghai Alcatel-Lucent Co., Ltd.

Address after: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai

Applicant after: Shanghai NOKIA Baer Limited by Share Ltd

Address before: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai

Applicant before: Shanghai Alcatel-Lucent Co., Ltd.

GR01 Patent grant
GR01 Patent grant