CN106301734A

CN106301734A - The management method of a kind of unauthorized carrier occupancy duration and device

Info

Publication number: CN106301734A
Application number: CN201510371485.XA
Authority: CN
Inventors: 苟伟; 赵亚军; 彭佛才; 毕峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-06-29
Filing date: 2015-06-29
Publication date: 2017-01-04
Also published as: WO2017000691A1

Abstract

The present invention provides management method and the device of a kind of unauthorized carrier occupancy duration；Described method, including: website performs the idle channel detection eCCA of idle channel detection CCA and/or extension；Described website, according to the orthogonal frequency division multiplex OFDM character position performed in the successful subframe of CCA/eCCA or thread or subframe position, determines the end position taking duration.

Description

Method and device for managing duration occupied by unauthorized carrier

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for managing an occupation duration of an unlicensed carrier.

Background

By far, it is known that LTE (Long Term Evolution) is deployed and operated in licensed carriers. But with the evolution of LTE, some companies (e.g., american high-traffic companies) proposed in the second half of 2013: it is proposed to study the issue of LTE deployment in unlicensed carriers. But is currently not accepted and established by LTE.

The main reasons for establishment given by the high-traffic company are: with the rapid growth of data traffic, the licensed spectrum will no longer be able to withstand such huge amounts of data in the near future. It is proposed to consider the deployment of LTE in unlicensed spectrum over which data traffic in licensed carriers is shared.

In addition, there are many advantages to unlicensed spectrum. For example, unlicensed spectrum has the following features and advantages:

1. free/low cost (no need to buy non-spectrum, zero cost of spectrum resources).

2. The admission requirement is low, the cost is low (individuals and enterprises can participate in deployment, and the equipment of equipment suppliers can be arbitrary).

3. The resources are shared (when a plurality of different systems operate therein or different operators of the same system operate therein, some ways of sharing the resources may be considered to improve the spectrum efficiency).

4. The wireless access technologies are multiple (different communication standards are crossed, the cooperation is difficult, and the network topology is various).

5. The wireless access stations are many (the number of users is large, the cooperation difficulty is large, and the centralized management overhead is large).

6. Applications are numerous (from the material, multiple services are mentioned that may operate therein, e.g. Machine to Machine (M2M), vessel to vessel (V2V)).

The above basic feature determines that unlicensed spectrum may be an important evolution direction of a wireless communication system, but there are many problems. For example, there will be various wireless systems in the unlicensed spectrum that are difficult to coordinate with each other and interfere severely.

If the LTE system operates in an unlicensed carrier, when an LTE base station occupies unlicensed carrier resources, how the occupied time length is perfectly combined with the subframe scheduling of the LTE, resource waste is avoided, meanwhile, the scheduling complexity is greatly reduced, the workload of standardized design is reduced, and under the constraint of a competitive backspacing mechanism suitable for the LTE, how the occupied time length is considered more reasonably is the problem to be solved.

Disclosure of Invention

The invention provides a method and a device for managing the occupation duration of an unauthorized carrier, which aim to solve the technical problem of how to reasonably occupy the unauthorized carrier.

In order to solve the technical problems, the invention provides the following technical scheme:

a method for managing the duration of an unauthorized carrier occupation comprises the following steps: the station executes a CCA and/or an eCCA; and the station determines the end position of the occupied duration according to the position of the orthogonal frequency division multiplexing OFDM symbol or the position of the subframe in the subframe or the scheduling unit which is successful in executing CCA/eCCA.

Wherein, the determining the end position of the occupied time length comprises:

when the position of the successful OFDM symbol for the station to execute CCA/eCCA is the first 3 symbols in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of a certain subframe or a scheduling unit.

when the positions of the successful OFDM symbols for the station to execute CCA/eCCA are from 4 th to 6 th symbols in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 3 rd symbol in a certain subframe or a scheduling unit.

when the position of the orthogonal frequency division multiplexing OFDM symbol in which the station successfully executes CCA/eCCA is in the 4 th to 6 th symbols in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 2 nd symbol in a certain subframe or a scheduling unit.

when the positions of the successful OFDM symbols for the station to execute CCA/eCCA are from the 7 th symbol to the 9 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 6 th symbol in a certain subframe or a scheduling unit.

when the position of the successful OFDM symbol for the station to execute CCA/eCCA is in the 10 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 9 th symbol in a certain subframe or a scheduling unit.

when the position of the successful OFDM symbol for the station to perform CCA/eCCA is in the 11 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 10 th symbol in a certain subframe or a scheduling unit.

when the position of the successful OFDM symbol for the station to perform CCA/eCCA is in the 12 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 11 th symbol in a certain subframe or a scheduling unit.

when the positions of the successful OFDM symbols for the station to perform CCA/eCCA are in 13 th to 14 th symbols in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 12 th symbol in a certain subframe or a scheduling unit.

when the positions of the OFDM symbols in which the station successfully executes CCA/eCCA are from 1 st to 6 th OFDM symbols in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary in a certain subframe or a scheduling unit.

Wherein, the symbols in the last occupied subframe or scheduling unit further include information of at least one of a physical downlink control channel PDCCH, a physical hybrid automatic repeat indicator channel PHICH, a physical control format indicator channel FCFICH, and a cell-specific reference signal CRS.

The time range of the station performing CCA/eCCA is from the starting position of the subframe, and is performed in the first 1 to 6 OFDM symbols, and the rest symbols do not allow CCA/eCCA.

The station adjusts the size of a contention window of eCCA or the type of CCA/eCCA according to ACK/NACK feedback of the UE; or;

the station adjusts the size of a contention window of eCCA or the type of CCA/eCCA according to the feedback indication of the UE; or;

the station determines the contention window size of the eCCA or the CCA/eCCA type according to the channel/signaling to be transmitted.

when the position of the successful OFDM symbol for the station to execute CCA/eCCA is the first 1 symbol or the first 2 symbols in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of a certain subframe or a scheduling unit.

when the position of the successful OFDM symbol for the station to perform CCA/eCCA is from the 2 nd symbol to the 4 th symbol or from the 3 rd symbol to the 4 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 3 rd symbol in a certain subframe or a scheduling unit.

when the position of the successful OFDM symbol for the station to perform CCA/eCCA is from the 2 nd symbol to the 4 th symbol or from the 3 rd symbol to the 4 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 2 nd symbol in a certain subframe or a scheduling unit.

when the positions of the successful OFDM symbols for the station to execute CCA/eCCA are from the 5 th symbol to the 7 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 6 th symbol in a certain subframe or a scheduling unit.

when the positions of the successful OFDM symbols for the station to perform CCA/eCCA are from 8 th symbol to 10 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 9 th symbol in a certain subframe or a scheduling unit.

when the position of the successful OFDM symbol for the station to perform CCA/eCCA is in the 13 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 12 th symbol in a certain subframe or a scheduling unit.

when the position of the successful OFDM symbol for the station to perform CCA/eCCA is in the 14 th symbol in a subframe or a scheduling unit, the occupied duration of the station is ended at the ending boundary of the 14 th symbol in a certain subframe or a scheduling unit.

when the positions of the OFDM symbols in which the station successfully performs CCA/eCCA are in the 1 st to 4 th OFDM symbols or the 1 st to 5 th OFDM symbols in a subframe or a scheduling unit, the occupied duration of the station ends at an ending boundary in a certain subframe or a scheduling unit.

Wherein the method further comprises:

if the occupied time length exceeds the preset maximum time length, the ending time is changed into the boundary of the former appointed OFDM symbol of the OFDM symbol; wherein the convention symbols include symbols 3, 6, 9, 10, 11, 12.

Wherein, the symbols in the last occupied subframe or scheduling unit further include at least one of PDCCH, PHICH, FCFICH and CRS.

The method further comprises the following steps:

the time range for the station to perform CCA/eCCA is from the starting position of the subframe, performed in the first 1 to 6 OFDM symbols, and the remaining symbols are not allowed to perform CCA/eCCA.

The method further comprises the following steps:

the site adjusts the size of a contention window of eCCA or the type of CCA/eCCA according to ACK/NACK feedback of the UE; or,

the station adjusts the size of a contention window of eCCA or the type of CCA/eCCA according to the feedback indication of the UE; or,

When the station uses the last subframe within the occupied time length and 2 or 3 OFDM symbols exist in the last subframe, the station uses the method as follows:

the first method is as follows:

when the station combines partial OFDM symbols in the sub-frame n and the sub-frame n +1 to be used as a super sub-frame, the conversion factor of the NPRB value of the station super sub-frame selection calculation data mapping is as follows: 1+ 1/6-1 + 1/4; preferably 1.2, wherein 2 or 3 OFDM symbols in the subframe n +1 are combined to be used as the super-subframe, and the OFDM symbols in the subframe n +1 include symbols for the control domain;

or when the station independently uses part of OFDM symbols in the subframe n +1 for data transmission, and when 3 symbols exist in the subframe n +1, and when the PDCCH occupies the first 1 or 2 OFDM symbols, the station selects the conversion factor for calculating the NPRB value of the data mapping to be 1/6-1/4;

the second method comprises the following steps:

when the station combines partial OFDM symbols in the sub-frame n and the sub-frame n +1 to be used as a super sub-frame, the conversion factor of the NPRB value of the station super sub-frame selection calculation data mapping is as follows:

when 2 or 3 OFDM symbols which are not used for the control domain in the subframe n +1 are combined to be used as a super subframe, when the PDCCH in the subframe n occupies 1 symbol, the conversion factor of the NPRB value of the data mapping is: 1.23; when the PDCCH occupies 2 symbols in the subframe n, the conversion factor of the NPRB value of the data mapping is: 1.25; when the PDCCH occupies 3 symbols in the subframe n, the conversion factor of the NPRB value of the data mapping is: 1.27;

or; the conversion factor of the NPRB value of the data mapping is: 1.25;

the third method comprises the following steps:

when 2 or 3 OFDM symbols including a control field are combined in the subframe n +1 and used as a super subframe, and when the PDCCH in the subframe n occupies 1 OFDM symbol, the conversion factor of the NPRB value of the data mapping is: 1.15; when the PDCCH occupies 2 symbols in the subframe n, the conversion factor of the NPRB value of the data mapping is: 1.16; when the PDCCH occupies 3 symbols in the subframe n, the conversion factor of the NPRB value of the data mapping is: 1.18;

or, when the OFDM symbol in the subframe n +1 includes the control field, the conversion factor of the NPRB value of the data mapping is: 1.16.

in the first mode, when the PDCCH occupies the first 1 or 2 OFDM symbols, the station selects a conversion factor for calculating the NPRB value of the data mapping to be 0.2.

A method for managing the duration of an unauthorized carrier occupation comprises the following steps:

and sending the occupation duration information of the unauthorized carrier.

Wherein the occupied duration information includes the number of occupied complete subframes.

Wherein the signaling for notifying the occupied number of full subframes is transmitted through an unlicensed carrier or a licensed carrier.

Wherein the signaling is transmitted through any one subframe during the occupied period.

The duration of occupancy information includes a starting position of the duration of occupancy and/or an ending position of the duration of occupancy.

The starting position of the occupation time length is determined according to a sequence appointed by blind detection, or is determined by receiving a sent signaling.

Wherein the timing of the subframe is determined according to a primary carrier of an unlicensed carrier pair.

and receiving the occupation duration information of the unauthorized carrier.

Wherein the method further comprises:

and determining the ending position of the occupied time length according to the occupied time length information.

Wherein, the starting position of the occupation time length is determined according to the sequence appointed by the blind test, or determined by the received signaling.

An apparatus for managing duration of occupation of an unlicensed carrier, comprising:

a detection module for performing a clear channel detection, CCA, and/or an extended clear channel detection, eCCA;

and the determining module is used for determining the end position of the occupied duration according to the position of the orthogonal frequency division multiplexing OFDM symbol or the position of the subframe in the subframe or the scheduling unit which is successful in executing CCA/eCCA.

Wherein the determining module is specifically configured to:

when the position of the successful OFDM symbol for executing CCA/eCCA is the first 3 symbols in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for executing CCA/eCCA are from 4 th to 6 th symbols in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 3 rd symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the orthogonal frequency division multiplexing OFDM symbols successfully executing CCA/eCCA are from 4 th to 6 th symbols in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 2 nd symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for executing CCA/eCCA are from 7 th symbol to 9 th symbol in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 6 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the position of the successful OFDM symbol for executing CCA/eCCA is in the 10 th symbol in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 9 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to: :

when the position of the successful OFDM symbol for executing CCA/eCCA is in the 11 th symbol in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 10 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the position of the successful OFDM symbol for executing CCA/eCCA is in the 12 th symbol in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 11 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for performing CCA/eCCA are in 13 th to 14 th symbols in a subframe or a scheduling unit, the occupied time length ends at the ending boundary of the 12 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for executing CCA/eCCA are in the 1 st to 6 th OFDM symbols in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary in a certain subframe or a scheduling unit.

The time range of the CCA/eCCA performed by the detection module is from the starting position of the subframe, the CCA/eCCA is performed in the first 1 to 6 OFDM symbols, and the CCA/eCCA is not allowed to be performed in the rest symbols.

Adjusting the size of a contention window of eCCA or the type of CCA/eCCA according to ACK/NACK feedback of the UE; or;

adjusting the contention window size of eCCA or the type of CCA/eCCA according to the feedback indication of the UE; or;

determining a contention window size of the eCCA or a CCA/eCCA type according to a channel/signaling to be transmitted.

Wherein the determining module is specifically configured to:

when the position of the successful OFDM symbol for executing CCA/eCCA is the first 1 symbol or the first 2 symbols in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for executing CCA/eCCA are from 2 nd to 4 th symbols or from 3 rd to 4 th symbols in a subframe or a scheduling unit, the occupied time length ends at the ending boundary of the 3 rd symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for performing CCA/eCCA are from 2 nd to 4 th symbols or from 3 rd to 4 th symbols in a subframe or a scheduling unit, the occupied duration ends at the ending boundary of the 2 nd symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for executing CCA/eCCA are from the 5 th symbol to the 7 th symbol in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 6 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for executing CCA/eCCA are from 8 th symbol to 10 th symbol in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 9 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the position of the successful OFDM symbol for executing CCA/eCCA is in the 13 th symbol in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 12 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the position of the successful OFDM symbol for executing CCA/eCCA is in the 14 th symbol in a subframe or a scheduling unit, the occupied time length is ended at the ending boundary of the 14 th symbol in a certain subframe or a scheduling unit.

Wherein the determining module is specifically configured to:

when the positions of the successful OFDM symbols for executing CCA/eCCA are 1 st to 4 th OFDM symbols or 1 st to 5 th OFDM symbols in a subframe or a scheduling unit, the occupied time length ends at an ending boundary in a certain subframe or a scheduling unit.

If the occupied time length exceeds the preset maximum time length, the ending time is changed into the boundary of the previous appointed OFDM symbol of the OFDM symbol; wherein the convention symbols include symbols 3, 6, 9, 10, 11, 12.

Adjusting the size of a contention window of eCCA or the type of CCA/eCCA according to ACK/NACK feedback of the UE; or,

adjusting the contention window size of eCCA or the type of CCA/eCCA according to the feedback indication of the UE; or,

the first method is as follows:

when partial OFDM symbols in the sub-frame n and the sub-frame n +1 are combined to be used as a super sub-frame, the converting factor of the NPRB value of the site super sub-frame selection calculation data mapping is as follows: 1+ 1/6-1 + 1/4; preferably 1.2, wherein 2 or 3 OFDM symbols in the subframe n +1 are combined to be used as the super-subframe, and the OFDM symbols in the subframe n +1 include symbols for the control domain;

or when partial OFDM symbols in the subframe n +1 are independently used for data transmission, when 3 symbols exist in the subframe n +1, and when the PDCCH occupies the first 1 or 2 OFDM symbols, the station selects the conversion factor for calculating the NPRB value of the data mapping to be 1/6-1/4;

the second method comprises the following steps:

when partial OFDM symbols in the sub-frame n and the sub-frame n +1 are combined to be used as a super sub-frame, the converting factor of the NPRB value of the site super sub-frame selection calculation data mapping is as follows:

or; the conversion factor of the NPRB value of the data mapping is: 1.25;

the third method comprises the following steps:

and the sending module is used for sending the occupation duration information of the unauthorized carrier.

Wherein the end position of the occupancy period is determined according to the apparatus of any one of claims 43 to 71.

and the receiving module is used for receiving the occupation duration information of the unauthorized carrier.

Wherein the apparatus further comprises:

and the acquisition module is used for determining the ending position of the occupied time length according to the occupied time length information.

The embodiment provided by the invention can realize the occupation of the unauthorized carrier in the LTE system, and furthest uses the existing LTE physical channel signaling, so that the influence on the LTE system is minimum.

Drawings

Fig. 1 is a flowchart of a method for managing an occupation duration of an unlicensed carrier according to the present invention;

fig. 2 is a structural diagram of a management apparatus for an occupation duration of an unlicensed carrier according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 1 is a flowchart of a method for managing an occupation duration of an unlicensed carrier according to the present invention. The method shown in fig. 1 comprises:

step 101, a station executes a clear channel detection CCA and/or an extended clear channel detection eCCA;

and step 102, the station determines the end position of the occupied duration according to the position of the orthogonal frequency division multiplexing OFDM symbol or the position of the subframe in the subframe or the scheduling unit which is successful in executing CCA/eCCA.

Specifically, LTE is deployed in unlicensed carriers, and is called an LAA system in the research and evolution process of LTE. The method and the device consider that different and suitable end points of the duration occupied by the unlicensed carrier are defined by combining with a scheduling rule of the LTE based on a subframe (1ms duration) as a unit, so that part of rules of the existing LTE can be reused by data mapping in the last subframe in the duration occupied, and the design complexity and unnecessary standardized workload are reduced.

When the station occupies the unlicensed carrier, the occupation time duration is determined according to the time point when the CCA and/or eCCA (hereinafter, the CCA/eCCA is used for replacing the CCA/eCCA) are successful. Generally, the maximum duration of a single occupancy in an unlicensed carrier is limited, for example, 13ms in europe and 4ms in japan, which are self-regulated in different countries or regions. Since the time point at which the CCA/eCCA is successfully executed may be any time point in the subframe, if the station occupies an integer ms for occupation, the last subframe in the occupation duration of almost every time (with a high probability) is an incomplete subframe. The method and the device determine the number of OFDM symbols contained in the last subframe within the occupied time according to the symbol position of CCA/eCCA execution success.

Table 1 below gives the basic idea of mode 1 of the present application.

When the LAA station succeeds in performing CCA/eCCA, the station determines the position of the OFDM symbol where the station is located, and at this time, the timing (including subframe timing and OFDM timing) of a primary carrier (which is a licensed carrier) paired with the unlicensed carrier may be referred to. The duration of a station is determined, and then the occupied duration (which may be described in units of integer ms, or in units of subframes, or in units of scheduling (which includes 1ms, and is composed of 14 OFDM symbols or 12 OFDM symbols; and also includes 0.5ms, that is, 7 or 6 OFDM symbols)) is determined according to the load (downlink and/or uplink load) condition, and the number of occupied OFDM symbols in the last subframe is determined according to the rule in table 1.

TABLE 1

Note: when the CCA/eCCA success time is located in the 4 th to 6 th OFDM symbols, the number of the occupied OFDM symbols in the last subframe may also be 0 or 2.

Table 2 below gives the basic idea of mode 2 of the present application.

When the LAA station succeeds in performing CCA/eCCA, the station determines the position of the OFDM symbol where the station is located, and at this time, the timing (including subframe timing and OFDM timing) of a primary carrier (which is a licensed carrier) paired with the unlicensed carrier may be referred to. The duration of the station is determined, and then the occupied duration (which may be described in units of integer ms, or in units of subframes, or in units of scheduling) may be determined according to the load (downlink and/or uplink load) and the number of OFDM symbols occupied in the last subframe is determined according to the rule in table 1.

Table 2 gives the rules of proximity to generate symbol data for the last subframe in the case that the final total duration of occupancy does not exceed the maximum duration of single occupancy as specified by regulations or protocols.

TABLE 2

Note: tables 1 and 2 are for the case of normal CP, and similar processing can be used for extended CP. When the occupied time length determined according to table 2 exceeds the regulated maximum time length, the station is not executed according to table 2, but executed according to table 1, otherwise executed according to table 2.

For the case that there are 2 or 3 OFDM symbols in the occupied last subframe (the first 2 or 3 symbols of the last subframe are occupied), the method for occupying the station to further use the symbol is described as follows (for example, the latter subframe is a partial subframe, the former subframe is a complete subframe, and vice versa):

mode 3

When the site combines partial OFDM symbols in the sub-frame N and the sub-frame N +1 to be used as a super sub-frame, the super sub-frame of the site selects N for calculating data mapping_PRBThe calculation method of the conversion factor of the value is as follows: considering that a control domain exists in the subframe n +1, but downlink control information is no longer carried, 1 OFDM symbol is reserved for the control domain, and 2 symbols are generally used as the control domain in a complete subframe. The calculation formula is therefore: when 2 symbols in subframe n +1 are used for data transmission, then the conversion factor for the super-subframe is calculated as: (12+2)/12 (where 12 is the corresponding factor in the case of setting a complete subframe and 2 is the newly added OFDM symbol, similar principles are used in the following case); when there are 3 symbols in subframe n +1 to be used for data transmission, the reduction factor of the super-subframe is calculated as (12+ 3)/12. The conversion factor for a super-subframe is therefore calculated as: 1+ 1/6-1 + 1/4; preferably 1.2.

Or, when the station independently uses part of OFDM symbols in the subframe N +1 for data transmission, the station selects N for calculating data mapping in the same calculation principle as above_PRBThe conversion factor of the value is 1/6-1/4, preferably 0.2. Since the channel quality measurement in the actual wireless link cannot react without errors, after simulation verification, the performance is relatively close under the conditions of 1/6 and 1/4, and for simplicity and reduction of signaling overhead, a uniform conversion factor of 0.2 is given after synthesis, or the conversion factor of the corresponding super-sub-frame is 1.2.

In the manner of the 4-way,

when the site combines partial OFDM symbols in the sub-frame N and the sub-frame N +1 to be used as a super sub-frame, the super sub-frame of the site selects N for calculating data mapping_PRBThe conversion factor of the value is:

when 2 or 3 OFDM symbols which are not used for the control domain in the subframe N +1 are combined to be used as a super subframe, when the PDCCH occupies 1 symbol in the subframe N, N of data mapping_PRBThe conversion factor of the value is: 1.23 (calculated as (12+ 3)/(13)); n of data mapping when PDCCH occupies 2 symbols in subframe N_PRBThe conversion factor of the value is: 1.25 (calculated as (12+ 3)/(12)); n of data mapping when PDCCH occupies 3 symbols in subframe N_PRBThe conversion factor of the value is: 1.27 (calculated as (12+ 3)/(11)).

Because the channel quality measurement in the actual wireless link cannot react without errors, after simulation verification, the performance is relatively close under the corresponding conditions of 1.23, 1.25 and 1.27, and for simplicity and reduction of signaling overhead, after synthesis, the conversion factors of the NPRB values of the data mapping are all: 1.25.

mode 5

when 2 or 3 OFDM symbols including the control field are combined to be used as a super subframe in the subframe N +1, and when the PDCCH occupies 1 OFDM symbol in the subframe N, N of data mapping_PRBThe conversion factor of the value is: 1.15 (calculation in (13+ 2)/13); n of data mapping when PDCCH occupies 2 symbols in subframe N_PRBThe conversion factor of the value is: 1.16 (calculation in (12+ 2)/12); n of data mapping when PDCCH occupies 3 symbols in subframe N_PRBThe conversion factor of the value is: 1.18 (calculated as (11+ 2)/11).

Because the channel quality measurement in the actual wireless link cannot react without errors, after simulation verification, the performance is relatively close under the corresponding conditions of 1.15, 1.16 and 1.18, and for simplicity and reduction of signaling overhead, after synthesis, the conversion factors of the NPRB values of the data mapping are all: 1.16.

indication of occupancy duration or determination of occupancy end location, as follows:

the LAA site (including the base station and the UE) can determine the starting position of the LAA site occupying the unlicensed carrier (including describing according to the OFDM symbol, or describing as a time point, or describing as a random backoff value, or describing as a time point when the LAA site starts to send data, etc.) by detecting (blind detection appointed sequence) or receiving signaling, and then the LAA site can notify the occupied number of complete subframes (including or not including the last partial subframe, and then not including the last partial subframe to reduce signaling overhead.

For example, an LAA station is scheduled to occupy 5ms (one subframe is 1ms and includes 14 OFDM symbols), the station performs CCA/eCCA successfully in subframe n, obtains the usage right, and calculates the occupation duration from the successful time point (the UE may detect or explicitly notify the UE), and assuming that the station performs CCA/eCCA successfully in the 7 th OFDM symbol of subframe n, the receiving end and the station may determine that several OFDM symbols in the last subframe are occupied within the occupation duration according to table 1 and/or table 2. At this time, the LAA site notifies the number of occupied complete subframes, where the number of the complete subframes is 4, and the complete subframes are subframes n +1, n +2, n +3, and n +4, respectively; there is a subframe n +5 after, but subframe n +5 only occupies a part of the OFDM symbol.

The timing of the sub-frame is determined based on the primary carrier of the unlicensed carrier pair.

Signaling informing of the number of full subframes can be sent in the unlicensed carrier or the licensed carrier, and each subframe in the occupied period can be sent (in this case, the occupied duration is described in a descending description manner, for example, a description is given of the remaining several full subframes after the subframe (including or not including the current subframe)).

And the receiving end receives a signaling for informing the occupation of the starting point or blind detection, receives a signaling occupied by the complete subframe, acquires the number of symbols occupied in the last incomplete subframe according to the table 1 and/or the table 2, and finally determines the time length occupied by the LAA site according to the starting point, the number of the complete subframes and the symbols occupied by the last subframe.

The number of occupied full subframes is sent by DCI and may be placed in a PDCCH or ePDCCH common search region or a UE-specific search region. And using either the agreed common RNTI scrambling or the RNTI scrambling of the UE. If the time length occupied by the station is the maximum time length specified by the control or the protocol, the number of the complete subframes can not be sent, and the receiving end and the sending end are considered to be occupied according to the maximum time length.

When a station uses an unauthorized carrier to transmit data, the receiving end detects the time when a channel is changed from busy to idle, and takes the time as the end time of receiving the data.

For example, when a station occupies the last subframe within the duration of an unlicensed carrier, it often happens that the station occupies only a portion of the symbols of the subframe. When the station uses the subframe to transmit data to the receiving end, but the receiving end does not know where the unauthorized duration occupied by the station ends, and when the receiving end determines that the receiving end is scheduled (for example, control signaling is received), but does not know the specific symbol position of the end of the data channel, the receiving end receives the signal of the subframe, and takes the time when the channel (the unauthorized carrier) changes from busy to idle as an end time point of the subframe, and the data of the receiving end is transmitted in the subframe and before the time point.

The channel is changed from busy to idle, namely, when CCA/eCCA is executed, the detected signal energy of the channel is changed from high to lower than a threshold.

The receiving end can determine the symbol position of the data of the receiving end in the subframe by using the mode, and then the data is decoded.

Fig. 2 is a structural diagram of a management apparatus for an occupation duration of an unlicensed carrier according to the present invention. The apparatus of fig. 2, comprising:

a detection module 201, configured to perform a clear channel detection CCA and/or an extended clear channel detection eCCA;

a determining module 202, configured to determine an end position of the occupied duration according to a position of an orthogonal frequency division multiplexing OFDM symbol or a position of a subframe in a subframe or a scheduling unit in which CCA/eCCA is successfully performed.

Wherein the determining module 202 is specifically configured to:

Wherein the determining module 202 is specifically configured to: :

Wherein the determining module 202 is specifically configured to:

Wherein, the time range of CCA/eCCA performed by the detection module 201 is from the starting position of the subframe, performed in the first 1 to 6 OFDM symbols, and the remaining symbols are not allowed to perform CCA/eCCA.

Wherein the determining module 202 is specifically configured to:

When the last subframe in the occupied duration is used and 2 or 3 OFDM symbols exist in the last subframe, the station uses the method as follows:

the first method is as follows:

the second method comprises the following steps:

or; the conversion factor of the NPRB value of the data mapping is: 1.25;

the third method comprises the following steps:

In addition, the present invention also provides a device for managing the duration occupied by the unauthorized carrier, which comprises:

Wherein the end position of the duration of occupancy is determined using the apparatus described above.

Correspondingly, the invention also discloses a device for managing the duration occupied by the unauthorized carrier, which comprises:

Wherein the apparatus further comprises:

Wherein the end position of the duration of occupancy is determined by the apparatus as described above.

In summary, in combination with the scheduling rule based on subframe (1ms duration) as a unit in LTE, different and suitable end points of the duration occupied by the unlicensed carrier are defined, so that part of the rules of the existing LTE can be reused for data mapping in the last subframe within the duration occupied, thereby reducing the complexity of design and unnecessary standardization workload.

It will be understood by those of ordinary skill in the art that all or part of the steps of the above embodiments may be implemented using a computer program flow, which may be stored in a computer readable storage medium and executed on a corresponding hardware platform (e.g., system, apparatus, device, etc.), and when executed, includes one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may be implemented by using an integrated circuit, and the steps may be respectively manufactured as an integrated circuit module, or a plurality of the blocks or steps may be manufactured as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The devices/functional modules/functional units in the above embodiments may be implemented by general-purpose computing devices, and they may be centralized on a single computing device or distributed on a network formed by a plurality of computing devices.

Each device/function module/function unit in the above embodiments may be implemented in the form of a software function module and may be stored in a computer-readable storage medium when being sold or used as a separate product. The computer readable storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for managing the duration of an unlicensed carrier, comprising:

the station executes a CCA and/or an eCCA;

and the station determines the end position of the occupied duration according to the position of the orthogonal frequency division multiplexing OFDM symbol or the position of the subframe in the subframe or the scheduling unit which is successful in executing CCA/eCCA.

2. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

3. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

4. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

5. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

6. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

7. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

8. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

9. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

10. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

11. The method according to claim 3 or 4, wherein the symbols in the last occupied subframe or scheduling unit further include information of at least one of a physical downlink control channel PDCCH, a physical hybrid automatic repeat indicator channel PHICH, a physical control format indicator channel FCFICH and a cell-specific reference signal CRS.

12. The method according to any of claims 1 to 11, wherein the time range for the station to perform CCA/eCCA is from the start of the subframe, performed in the first 1 to 6 OFDM symbols, and the remaining symbols are not allowed to perform CCA/eCCA.

13. The method of claim 12, wherein:

the site adjusts the size of a contention window of eCCA or the type of CCA/eCCA according to ACK/NACK feedback of the UE; or;

14. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

15. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

16. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

17. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

18. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

19. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

20. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

21. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

22. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

23. The method of claim 1, wherein determining the end position of the duration of occupancy comprises:

24. The method of any one of claims 1 or 14 to 23, further comprising:

25. The method of claim 15 or 16, wherein at least one of PDCCH, PHICH, FCFICH and CRS is also included in symbols in the last subframe or scheduling unit occupied.

26. The method of any one of claims 1 or 14 to 25, further comprising:

27. The method of any one of claims 1 or 14 to 25, further comprising:

28. The method of claim 1, wherein when the station uses the last subframe in the duration of occupancy, and when there are 2 or 3 OFDM symbols in the last subframe, the station uses either:

the first method is as follows:

when the site combines partial OFDM symbols in the sub-frame N and the sub-frame N +1 to be used as a super sub-frame, the super sub-frame of the site selects N for calculating data mapping_PRBThe conversion factor of the value is: 1+ 1/6-1 + 1/4; preferably 1.2, wherein 2 or 3 OFDM symbols in the sub-frame n +1 are combined for use as a super-sub-frame and the OFDM symbol in the sub-frame n +1 comprisesA symbol for a control field;

or, when the station independently uses a part of OFDM symbols in the subframe N +1 for data transmission, and there are 3 symbols in the subframe N +1, when the PDCCH occupies the first 1 or 2 OFDM symbols, the station selects N for calculating data mapping_PRBThe conversion factor of the value is 1/6-1/4;

the second method comprises the following steps:

when 2 or 3 OFDM symbols which are not used for the control domain in the subframe N +1 are combined to be used as a super subframe, when the PDCCH occupies 1 symbol in the subframe N, N of data mapping_PRBThe conversion factor of the value is: 1.23; n of data mapping when PDCCH occupies 2 symbols in subframe N_PRBThe conversion factor of the value is: 1.25; n of data mapping when PDCCH occupies 3 symbols in subframe N_PRBThe conversion factor of the value is: 1.27;

or; n of data mapping_PRBThe conversion factor of the value is: 1.25;

the third method comprises the following steps:

when 2 or 3 OFDM symbols including the control field are combined to be used as a super subframe in the subframe N +1, and when the PDCCH occupies 1 OFDM symbol in the subframe N, N of data mapping_PRBThe conversion factor of the value is: 1.15; n of data mapping when PDCCH occupies 2 symbols in subframe N_PRBThe conversion factor of the value is: 1.16; n of data mapping when PDCCH occupies 3 symbols in subframe N_PRBThe conversion factor of the value is: 1.18;

alternatively, when the OFDM symbol in subframe N +1 includes a control field, N of the data mapping_PRBThe conversion factor of the value is: 1.16.

29. the method of claim 28The method is characterized in that in the first mode, when the PDCCH occupies the first 1 or 2 OFDM symbols, the station selects N for calculating data mapping_PRBThe conversion factor of the value is 0.2.

30. A method for managing the duration of an unlicensed carrier, comprising:

and sending the occupation duration information of the unauthorized carrier.

31. The method of claim 30, wherein the occupancy duration information comprises an occupied number of full subframes.

32. The method of claim 31, wherein the signaling for signaling the number of occupied full subframes is sent over an unlicensed carrier or a licensed carrier.

33. The method of claim 32, wherein the signaling is sent in any subframe during the occupied period.

34. The method according to claim 31, wherein the duration of occupancy information comprises a start position of the duration of occupancy and/or an end position of the duration of occupancy.

35. The method of claim 30, wherein the starting position of the duration of occupancy is determined according to a sequence of blind detection conventions or by receiving transmitted signaling.

36. The method according to claim 30, wherein the end position of the occupancy period is determined according to the method of any one of claims 1 to 29.

37. The method according to any of claims 30 to 36, wherein the timing of the sub-frame is determined based on a primary carrier of an unlicensed carrier pair.

38. A method for managing the duration of an unlicensed carrier, comprising:

and receiving the occupation duration information of the unauthorized carrier.

39. The method of claim 38, wherein the occupancy duration information comprises an occupied number of full subframes.

40. The method of claim 38, further comprising:

41. The method of claim 38, wherein the starting position of the duration of occupancy is determined according to a sequence of blind detection conventions or determined by received signaling.

42. The method according to claim 40, wherein the end position of the occupancy period is determined according to the method of any one of claims 1 to 29.

43. An apparatus for managing duration of an unlicensed carrier, comprising:

44. The apparatus according to claim 43, wherein the determining module is specifically configured to:

45. The apparatus according to claim 43, wherein the determining module is specifically configured to:

46. The apparatus according to claim 43, wherein the determining module is specifically configured to:

47. The apparatus according to claim 43, wherein the determining module is specifically configured to:

48. The apparatus according to claim 43, wherein the determining module is specifically configured to:

49. The apparatus according to claim 43, wherein the determining module is specifically configured to: :

50. The apparatus according to claim 43, wherein the determining module is specifically configured to:

51. The apparatus according to claim 43, wherein the determining module is specifically configured to:

52. The apparatus according to claim 43, wherein the determining module is specifically configured to:

53. The apparatus of claim 45 or 46, wherein the symbols in the last occupied subframe or scheduling unit further comprise information of at least one of a Physical Downlink Control Channel (PDCCH), a physical hybrid automatic repeat indicator channel (PHICH), a physical control format indicator channel (FCFICH) and a cell-specific reference signal (CRS).

54. The apparatus according to any of claims 43 to 53, wherein the CCA/eCCA performed by the detection module is performed in the first 1 to 6 OFDM symbols starting from the start position of the subframe, and the CCA/eCCA is not allowed for the remaining symbols.

55. The apparatus of claim 54, wherein:

56. The apparatus according to claim 43, wherein the determining module is specifically configured to:

57. The apparatus according to claim 43, wherein the determining module is specifically configured to:

58. The apparatus according to claim 43, wherein the determining module is specifically configured to:

59. The apparatus according to claim 43, wherein the determining module is specifically configured to:

60. The apparatus according to claim 43, wherein the determining module is specifically configured to:

61. The apparatus according to claim 43, wherein the determining module is specifically configured to:

62. The apparatus according to claim 43, wherein the determining module is specifically configured to:

63. The apparatus according to claim 43, wherein the determining module is specifically configured to:

64. The apparatus according to claim 43, wherein the determining module is specifically configured to:

65. The apparatus according to claim 43, wherein the determining module is specifically configured to:

66. The apparatus of any one of claims 43 or 56 to 65, wherein:

67. The apparatus of claim 57 or 58, wherein symbols in the last subframe or scheduling unit occupied further comprise at least one of PDCCH, PHICH, FCFICH, and CRS.

68. The apparatus of any one of claims 43 or 56-67, wherein the CCA/eCCA performed by the detection module is performed in a time range from a starting position of a subframe to the first 1 to 6 OFDM symbols, and the remaining symbols are not allowed to perform CCA/eCCA.

69. The apparatus of any one of claims 43 or 56 to 67, wherein:

70. The apparatus of claim 43, wherein when the station uses the last subframe of the occupancy duration, and there are 2 or 3 OFDM symbols in the last subframe, the station uses either:

the first method is as follows:

when partial OFDM symbols in the sub-frame N and the sub-frame N +1 are combined to be used as a super sub-frame, the station super sub-frame selects N of the calculation data mapping_PRBThe conversion factor of the value is: 1+ 1/6-1 + 1/4; preferably 1.2, wherein 2 or 3 OFDM symbols in the subframe n +1 are combined to be used as the super-subframe, and the OFDM symbols in the subframe n +1 include symbols for the control domain;

or, when partial OFDM symbols in the subframe N +1 are independently used for data transmission, when 3 symbols exist in the subframe N +1, and when the PDCCH occupies the first 1 or 2 OFDM symbols, the station selects to calculate the N of the data mapping_PRBThe conversion factor of the value is 1/6-1/4;

the second method comprises the following steps:

when partial OFDM symbols in the sub-frame N and the sub-frame N +1 are combined to be used as a super sub-frame, the station super sub-frame selects N of the calculation data mapping_PRBThe conversion factor of the value is:

2 or 3 OFDM symbols in the subframe n +1 and not used for the control domain are combined as a super-subWhen the frame is used, when the PDCCH occupies 1 symbol in the subframe N, N of data mapping_PRBThe conversion factor of the value is: 1.23; n of data mapping when PDCCH occupies 2 symbols in subframe N_PRBThe conversion factor of the value is: 1.25; n of data mapping when PDCCH occupies 3 symbols in subframe N_PRBThe conversion factor of the value is: 1.27;

or; n of data mapping_PRBThe conversion factor of the value is: 1.25;

the third method comprises the following steps:

71. the apparatus of claim 70, wherein in mode one, when PDCCH occupies the first 1 or 2 OFDM symbols, the station selects to calculate N of data mapping_PRBThe conversion factor of the value is 0.2.

72. An apparatus for managing duration of an unlicensed carrier, comprising:

73. The apparatus of claim 72, wherein the occupancy duration information comprises a number of occupied full subframes.

74. The apparatus of claim 73, wherein signaling for signaling the number of occupied full subframes is sent over an unlicensed carrier or a licensed carrier.

75. The apparatus of claim 74, wherein the signaling is sent in any subframe during the occupied period.

76. The apparatus according to claim 73, wherein the duration of occupancy information comprises a start position of the duration of occupancy and/or an end position of the duration of occupancy.

77. The apparatus of claim 72, wherein the starting position of the duration of occupancy is determined according to a sequence of blind detection conventions, or determined by receiving transmitted signaling.

78. The apparatus of claim 72, wherein the end position of the duration of occupancy is determined according to the apparatus of any one of claims 43 to 71.

79. The apparatus of any of claims 72 to 78, wherein the timing of the sub-frame is determined according to a primary carrier of an unlicensed carrier pair.

80. An apparatus for managing duration of an unlicensed carrier, comprising:

81. The apparatus of claim 80, wherein the occupancy duration information comprises a number of occupied full subframes.

82. The apparatus of claim 80, further comprising:

83. The apparatus of claim 80, wherein the starting position of the duration of occupancy is determined according to a sequence of blind detection conventions, or determined through received signaling.

84. The apparatus of claim 82, wherein the end position of the duration of occupancy is determined according to the apparatus of any one of claims 43 to 71.