CN105407489B - Spectrum sharing method and transmission node - Google Patents
Spectrum sharing method and transmission node Download PDFInfo
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- CN105407489B CN105407489B CN201410465622.1A CN201410465622A CN105407489B CN 105407489 B CN105407489 B CN 105407489B CN 201410465622 A CN201410465622 A CN 201410465622A CN 105407489 B CN105407489 B CN 105407489B
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Abstract
The invention discloses a frequency spectrum sharing method and a transmission node, wherein the transmission node determines initial data transmission time and silent time within preset time; the transmission node transmits data on the shared spectrum in the data transmission time, and detects the resource utilization condition on the shared spectrum in the silent time; and adjusting the data transmission time and the silence time in the next preset time according to the detected resource utilization condition on the shared frequency spectrum. The method solves the coexistence problem of the LTE system and other systems on the shared spectrum, and realizes the normal work of the LTE on the shared spectrum.
Description
Technical Field
The present invention relates to spectrum sharing technologies, and in particular, to a spectrum sharing method and a transmission node.
Background
Long Term Evolution (LTE) systems operate deployed in licensed carriers. With the rapid growth of data traffic, licensed spectrum will not be able to withstand the rapidly growing amount of data in the near future. Therefore, LTE is deployed in the shared spectrum, and sharing data traffic in the licensed carrier through the shared spectrum is an important evolution direction of LTE development.
The shared spectrum has the following characteristics: free/low cost; the admission requirement is low, the cost is low, for example, individuals and enterprises can participate in deployment, and the equipment of equipment manufacturers can be arbitrary; when a plurality of different systems operate the shared spectrum, or different operators of the same system operate the shared spectrum, some resource sharing modes can be considered to improve the spectrum efficiency; the number of wireless access technologies is large; the number of wireless access sites is large; in view of the related data, it is mentioned that multiple services may operate in a shared spectrum, such as services from Machine to Machine (M2M), Vehicle to automobile (V2V), and so on.
However, for the shared spectrum, there are multiple systems operating on the same spectrum, such as WIFI systems, Radar (Radar), and other systems. Therefore, to implement LTE operation on shared spectrum, it is important to solve the coexistence problem of LTE system and other systems. At present, no specific implementation scheme for realizing spectrum sharing is provided in the industry.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a spectrum sharing method and a transmission node, which can solve the coexistence problem between the LTE system and other systems.
In order to achieve the object of the present invention, the present invention provides a spectrum sharing method, including: the transmission node determines initial data transmission time and silent time in preset time;
the transmission node transmits data on the shared spectrum in the data transmission time, and detects the resource utilization condition on the shared spectrum in the silent time;
and adjusting the data transmission time and the silence time in the next preset time according to the detected resource utilization condition on the shared frequency spectrum.
The determining the data transmission time and the silence time within the preset time comprises:
detecting the number of transmission nodes of a system to which the transmission nodes belong, the number of transmission nodes of other systems except the system to which the transmission nodes belong and/or the resource idle condition of a shared frequency spectrum in a detection time window W;
determining the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2 according to the detected informationmin；
Alternatively, the first and second electrodes may be,
detecting the activity condition of transmission nodes of other systems except the system to which the transmission node belongs, the service requirement of the transmission nodes of the system to which the transmission nodes belong and/or the resource idle condition of the shared spectrum in a detection time window W;
determining the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2 according to the detected informationmin。
The preset time T1 is determined based on a detection time window W; or, the preset time T1 is signaled to the transmission node by a carrier on a licensed spectrum;
wherein the preset time T1 is equal to the sum of the initial data transmission time T2 and the silence time T3.
The detection time window W comprises the silence time; alternatively, the detection time window W is preset.
The detection time window W is periodic, and the period size of the detection time window W is configured or preset by a carrier on an authorized frequency spectrum through signaling;
or, the detection time window W is triggered, and the transmission node is triggered to perform re-detection by a carrier on a licensed spectrum.
The determining the data transmission time and the silence time within the preset time comprises:
signaling the initial data transmission time T2 and the silence time T3, and the minimum value T2 of the initial data transmission time T2 by carriers on a licensed spectrumminAnd informing the transmission node.
The determining the data transmission time and the silence time within the preset time comprises:
the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2minIs a preset default value;
wherein the preset time T1 is equal to the sum of the initial data transmission time T2 and the silence time T3, the ratio of the data transmission time T2 to the silence time T3 is 1:1, and the minimum value T2 of the initial data transmission time T2minEqual to the initial data transfer time T2.
In the data transmission time T2, the transmission node adopts the existing mechanism of the system to which the transmission node belongs to carry out data transmission;
during the data transmission time T2, the transmission node of the system other than the system to which the transmission node belongs cannot occupy.
The starting points of the data transmission time T2 of all the transmission nodes of the system to which the transmission node belongs are aligned within the network coverage.
The detecting the resource utilization on the shared spectrum in the silent period specifically includes:
according to a preset time granularity TstepDividing the silent time T3 into several equal parts, each time granularity TstepThe time length of the equal part is equal to the time granularity Tstep；
Detecting granularity T at each timestepResource utilization on the internal shared spectrum;
when a certain time granularity T is detectedstepWhen the signal energy is lower than the preset threshold value, marking the time granularity TstepThe resources within are idle.
When it is detected that the resource is idle in the quiet time T3, the adjusting the data transmission time and the quiet time in the next preset time includes:
if the idle resources have k equal parts and k<N, granularity T of k idle timestepData transmission time T2 adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 of the current preset time T1, the number k of idle resources and the time granularity TstepThe sum of the product values of the products of (a) and (b), and,
the silence time of the next preset time T1 is the silence time T3 of the current preset time T1, the number k of idle resources and the time granularity TstepThe difference of the product values of the products of (a);
or if the idle resources have k equal parts and k is equal to N, (k-1) idle time granularities TstepData transmission time T2 adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepAnd the silence time T3 of the next preset time T1 is the time granularity Tstep；
Or if no free resources exist, no adjustment is carried out; or, pre-processing the next oneThe data transfer time T2 of the set time T1 is adjusted to the minimum value T2 of the data transfer time T2 of the current preset time T1min(ii) a The silence time T3 of the next preset time T1 is the minimum value T2 of the data transmission time T2 of the preset time T1 and the current preset time T1minA difference value of the difference;
wherein the plurality of equal parts are N equal parts.
When it is detected that the resource is idle in the quiet time T3, the adjusting the data transmission time and the quiet time in the next preset time includes:
if p preset idle equal parts of resources are continuously detected, directly entering the data transmission time of the next preset time T1;
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the even number N-m) of the current preset time T1 and the time granularity TstepThe sum of the product values of the products of (a);
the silence time T3 of the next preset time T1 is m and the silence time granularity TstepThe product value of the product of (a);
wherein m is the number of the detected non-idle equal parts of resources before the p idle equal parts of resources are continuously detected; and m + p < ═ N.
When it is detected that the resource is idle in the quiet time T3, the adjusting the data transmission time and the quiet time in the next preset time includes:
if the idle resources have k equal parts and k>1, (k-1) idle time granularity TstepTime T2 of data transmission adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepAnd the silence time T3 of the next preset time T1 is the time granularity T and the difference between the halving number N and the difference between the (number of free resources k-1)stepThe product value of the product of (a);
or if only the resources in one equal part are idle, no adjustment is performed;
or, if there is no idle resource, the time granularity T is the step lengthstepAdjusting time T2 and quiet time T3 of data transmission of the next preset time T1:
the data transmission time T2 of the next preset time T1 is the current data transmission time and the time granularity TstepA difference value of the difference; the silence time T3 of the next preset time T1 is the current silence time T3 and the time granularity TstepThe sum of the sums thereof; wherein the data transmission time T2 of the next preset time T1 is greater than or equal to the minimum value T2 of the initial data transmission time T2min(ii) a If the data transmission time T2 of the current preset time T1 is equal to the minimum value T2 of the data transmission time T2minThen no adjustment is made.
When it is detected that the resource is idle in the quiet time T3, the adjusting the data transmission time and the quiet time in the next preset time includes:
if p preset idle equal parts of resources are continuously detected, directly entering the data transmission time of the next preset time T1;
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the even number N-m-1) of the current preset time T1 and the time granularity TstepThe sum of the product values of the products of (a);
the silence time T3 of the next preset time T1 is (m +1) and the silence time granularity TstepThe product value of the product of (a);
wherein m is the number of the detected non-idle equal parts of resources before the p idle equal parts of resources are continuously detected; and m + p < ═ N.
The invention also provides a transmission node, which at least comprises a determining module, a data transmission and detection module and an adjusting module; wherein the content of the first and second substances,
the device comprises a determining module, a transmitting module and a receiving module, wherein the determining module is used for determining initial data transmission time and silent time in preset time;
the data transmission and detection module is used for transmitting data on the shared spectrum in data transmission time and detecting the resource utilization condition on the shared spectrum in silent time;
and the adjusting module is used for adjusting the data transmission time and the silent time in the next preset time according to the detected resource utilization condition on the shared spectrum, and outputting the adjusted data transmission time and the adjusted silent time to the data transmission and detection module.
The determining module is specifically configured to:
detecting the number of transmission nodes of a system to which the transmission nodes belong, the number of transmission nodes of other systems except the system to which the transmission nodes belong and/or the resource vacancy condition of a shared frequency spectrum in a detection time window W; or, detecting the activity condition of the transmission node of other systems except the system to which the transmission node belongs, the service requirement of the transmission node of the system to which the transmission node belongs and/or the resource idle condition of the shared spectrum in the detection time window W;
determining the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2 according to the detected informationmin；
The determining module is specifically configured to: receiving a carrier wave from a licensed frequency spectrum, wherein the carrier wave carries the initial data transmission time T2 and the silence time T3, and the minimum value T2 of the initial data transmission time T2minSignaling of (2).
The determining module is specifically configured to: presetting the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2min。
The data transmission and detection module is specifically configured to:
in the data transmission time T2, the transmission node adopts the existing mechanism of the system to which the transmission node belongs to carry out data transmission; during the data transmission time T2, a transmission node of a system other than the system to which the transmission node belongs cannot occupy;
according to a preset time granularity TstepDividing the quiet time T3 into a plurality of equal parts; detecting granularity T at each timestepResource utilization on the internal shared spectrum; when a certain time granularity T is detectedstepWhen the signal energy is lower than the preset threshold value, marking the time granularity TstepThe resources within are idle.
The starting points of the data transmission time T2 of all the transmission nodes of the system to which the transmission node belongs are aligned within the network coverage.
The adjustment module is specifically configured to:
when the idle resources have k equal parts and k<N times, k idle time granularities TstepData transmission time T2 adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 of the current preset time T1, the number k of idle resources and the time granularity TstepThe sum of the product values of the products of (a) and (b), and,
the silence time of the next preset time T1 is the silence time T3 of the current preset time T1, the number k of idle resources and the time granularity TstepThe difference of the product values of the products of (a);
when the idle resources have k equal parts and k is equal to N, (k-1) idle time granularities TstepData transmission time T2 adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepAnd the silence time T3 of the next preset time T1 is the time granularity Tstep；
When no idle resource exists, no adjustment is carried out; or, adjusting the data transmission time T2 of the next preset time T1 to the minimum value T2 of the data transmission time T2 of the current preset time T1min(ii) a The quiet time T3 of the next preset time T1 is the minimum value of the preset time T1 and the data transmission time T2 of the current preset time T1T2minA difference value of the difference;
wherein the plurality of equal parts are N equal parts.
The adjustment module is specifically configured to:
when p idle equal parts of resources are continuously detected, directly entering the data transmission time of the next preset time T1, wherein the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (equal number N-m) of the current preset time T1 and the time granularity TstepThe sum of the product values of the products of (a);
the silence time T3 of the next preset time T1 is m and the silence time granularity TstepThe product value of the product of (a);
wherein m is the number of the detected non-idle equal parts of resources before the p idle equal parts of resources are continuously detected; and m + p < ═ N.
The adjustment module is specifically configured to:
when the idle resources have k equal parts and k>1 hour, (k-1) idle time granularity TstepTime T2 of data transmission adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepAnd the silence time T3 of the next preset time T1 is the time granularity T and the difference between the halving number N and the difference between the (number of free resources k-1)stepThe product value of the product of (a);
or, when only the resources in one equal part are idle, no adjustment is performed;
or, when there is no idle resource, the time granularity T is the step lengthstepAdjusting time T2 and quiet time T3 of data transmission of the next preset time T1:
the data transmission time T2 of the next preset time T1 is the current data transmission time and the time granularity TstepA difference value of the difference; the silence time T3 of the next preset time T1 is the current silence time T3 and the timeParticle size TstepThe sum of the sums thereof; wherein the data transmission time T2 of the next preset time T1 is greater than or equal to the minimum value T2 of the initial data transmission time T2min(ii) a If the data transmission time T2 of the current preset time T1 is equal to the minimum value T2 of the data transmission time T2minThen no adjustment is made.
The adjustment module is specifically configured to:
when p preset idle equal parts of resources are continuously detected, directly entering the data transmission time of the next preset time T1;
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the even number N-m-1) of the current preset time T1 and the time granularity TstepThe sum of the product values of the products of (a);
the silence time T3 of the next preset time T1 is (m +1) and the silence time granularity TstepThe product value of the product of (a);
wherein m is the number of the detected non-idle equal parts of resources before the p idle equal parts of resources are continuously detected; and m + p < ═ N.
Compared with the prior art, the technical scheme includes that the transmission node determines initial data transmission time and silent time within preset time; the transmission node transmits data on the shared spectrum in the data transmission time, and detects the resource utilization condition on the shared spectrum in the silent time; and adjusting the data transmission time and the silence time in the next preset time according to the detected resource utilization condition on the shared frequency spectrum. The method solves the coexistence problem of the LTE system and other systems on the shared spectrum, and realizes the normal work of the LTE on the shared spectrum.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a spectrum sharing method according to the present invention;
FIG. 2 is a schematic diagram of a transmission node according to the present invention;
fig. 3 is a schematic diagram of a spectrum sharing method according to a first embodiment of the present invention;
fig. 4 is a diagram illustrating a spectrum sharing method according to a second embodiment of the present invention;
fig. 5 is a diagram illustrating a third embodiment of the spectrum sharing method according to the present invention;
fig. 6 is a schematic diagram of early termination of a quiet period in a third embodiment of the spectrum sharing method according to the present invention;
fig. 7 is a diagram illustrating a spectrum sharing method according to a fourth embodiment of the present invention;
fig. 8 is a diagram illustrating early termination of a quiet period in a fourth embodiment of the spectrum sharing method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 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 spectrum sharing method according to the present invention, as shown in fig. 1, including:
step 100: the transmission node determines an initial data transmission time and a silent time within a preset time.
In this step, the transmission node is a transmission node in one of transmission systems using a shared spectrum, and such a transmission system may be an LTE system.
In this step, it is assumed that the preset time is T1, the data transmission time is T2, the silence time is T3, and T1 is T2+ T3. The determination of the initial data transmission time T2 and the silence time T3 within the preset time T1 may be performed in one of the following manners:
the first mode is as follows:
detecting the number of transmission nodes of a first system in a detection time window W, and the number of transmission nodes of other systems and/or detecting the resource vacancy condition of a shared spectrum in the detection time window W;
determining an initial data transmission time T2 and a quiet time T3, and a minimum value T2 of the initial data transmission time T2 according to the detected informationmin。
Alternatively, the first and second electrodes may be,
detecting the activity condition of the transmission nodes of other systems in the detection time window W, the service requirement of the transmission node of the first system and/or the resource idle condition of the shared spectrum in the detection time window W;
determining an initial data transmission time T2 and a quiet time T3, and a minimum value T2 of the initial data transmission time T2 according to the detected informationmin。
Wherein the detection time window W includes a silence time, or the detection time window W is a preset time window.
Wherein the data transmission time T2 and the quiet time T3 are determined, and the minimum value T2 of the initial data transmission time T2minThe specific implementation of (a) is easy for those skilled in the art to implement, and the implementation manner is also many and is not limited to one. For example, assuming that the number of transmission nodes of the first system and the number of transmission nodes of the other systems are X and Y, respectively, the transmission time T2 may be determined as X/(X + Y) × T1, and the silence time T3 may be determined as Y/(X + Y) × T1. The preset time T1 may be determined based on the detection time window W, or may be signaled by a carrier on a licensed spectrum (also referred to as a licensed carrier) to a transmission node of the first system, where T1 is T2+ T3.
The detailed implementation of how to detect the known technologies belonging to the technical field is not used to limit the protection scope of the present invention, and generally includes: the number of transmission nodes of the first system and/or the other systems can be detected, for example, by detecting some characteristic signals (e.g., synchronization signals) of the first system and/or the other systems; the resource vacancy condition of the shared spectrum in the time window can be detected through detecting the signal energy in the detection window, and when the signal energy in the unit time (or the preset time length) is detected to be lower than the preset threshold value, the channel resource is considered to be vacant.
The second mode is as follows:
signaling the initial data transmission time T2 and the silence time T3, and the minimum value T2 of the initial data transmission time T2 by the carrier on the licensed spectrumminThe transmitting node of the first system is notified. It is emphasized here that the signalling by the carriers on the licensed spectrum may be signalled either by existing signalling or by newly defined signalling, which is not intended to limit the scope of the invention.
The third mode is as follows:
an initial data transmission time T2 and a silence time T3, and a minimum value T2 of the initial data transmission time T2minThe minimum value of the initial data transmission time T2, T2, is a preset default value, such as T2: T3 ═ 1:1minEqual to the initial data transfer time T2.
In this step, the detection time window W may be periodic, and the size of the period is configured by the carrier on the authorized spectrum through signaling, or may be preset;
or, the detection time window W is triggered, and the carrier on the authorized spectrum triggers the transmission node of the first system to perform re-detection; further, the conditions under which the carrier on the licensed spectrum triggers the transmitting node of the first system to re-detect may include, but are not limited to, the following: the number of transmission nodes of the first system and other systems is greatly changed; or a large change in traffic of the first system or other systems.
Step 101: the transmission node transmits data on the shared spectrum in the data transmission time, and detects the resource utilization condition on the shared spectrum in the silent time.
In this step, during the data transmission time T2, the transmission node of the first system performs data transmission by using the mechanism of the existing first system. During the data transmission time T2, the transmission node of the other system cannot occupy.
Further, the start points of the data transmission times T2 of all the transmission nodes of the first system within the network coverage are aligned.
The detecting the resource utilization on the shared spectrum within the quiet time in this step specifically includes:
according to a preset time granularity TstepThe quiet time T3 is divided into several equal parts, and assuming N equal parts, each equal part is called as time granularity TstepEqual portions of time length equal to the time granularity Tstep；
Detecting granularity T at each timestepResource utilization on the internal shared spectrum;
when a certain time granularity T is detectedstepWhen the signal energy is lower than the preset threshold value, marking the time granularity TstepThe resources in the system are idle, and meanwhile, the idle resource counter K can be added with one.
Wherein, the time granularity TstepCan be determined by a transmission unit of a certain system, such as a subframe of an LTE system, etc., it should be noted how to determine the time granularity TstepThe description is given for the sake of example only, without limiting the scope of the invention.
Step 102: and adjusting the data transmission time and the silence time in the next preset time according to the detected resource utilization condition on the shared frequency spectrum.
The adjusting of the data transmission time and the silence time within the next preset time in this step includes: when it is detected that there is a resource free in the quiet time T3, the data transmission time T2 and the quiet time T3 in the next preset time T1 are adjusted in one of the following ways:
the first adjustment mode is as follows:
if the idle resources have k equal parts and k<N times, k idle time granularities TstepData transmission time T2 adjusted to the next preset time T1: the data transmission time T2 of the next preset time T1 is the data transmission time T2 and null of the current preset time T1Number of idle resources k and time granularity TstepThe sum of the product values of (a) and (b), i.e. T2 ═ T2+ kTstep(ii) a The silence time of the next preset time T1 is the silence time T3 and the number k of idle resources and the time granularity T of the current preset time T1stepThe product of (a) is T3 ═ T3-kTstep；
If the idle resources have k equal parts and k is equal to N, (k-1) idle time granularities TstepData transmission time T2 adjusted to the next preset time T1: the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepT2 ═ T2+ (k-1) Tstep(ii) a The silence time of the next preset time T1 is the time granularity TstepI.e. T3 ═ Tstep；
If no free resources exist, no adjustment is carried out; or adjusting the data transmission time T2 of the next preset time T1 to the minimum value T2 of the data transmission time T2minI.e. T2-T2minThe silence time T3 of the next preset time T1 is the minimum value T2 of the data transmission time T2 between the preset time T1 and the current preset time T1minThe difference between the two, namely T3-T1-T2min；
Specifically, if p free equal parts of resources are continuously detected, the quiet period is terminated, and the data transmission time of the next preset time T1 is immediately entered in advance. Here, it is assumed that resources after p consecutive idle equal parts of resources in the original quiet period are also idle, and therefore, the data transmission time T2 of the next preset time T1 is the data transmission times T2 and (equal number of N-m) and the time granularity T of the current preset time T1stepThe sum of the product values of (a) and (b), i.e., T2 ═ T2+ (N-m) Tstep(ii) a The silence time T3 of the next preset time T1 is m and the silence time granularity TstepThe product of (a) is T3 ═ mTstep. Wherein m is the number of detected non-idle resource equal parts before p idle equal parts of resources are continuously detected, and m + p is assumed here<＝N。
The second adjustment mode is as follows:
if the idle resources have k equal parts and k>1, (k-1) idle time granularity TstepAdjusting the time T2 of data transmission to the next preset time T1, wherein the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) and the time granularity T of the current preset time T1stepThe sum of the product values of (a) and (b), i.e., T2 ═ T2+ (k-1) Tstep(ii) a The quiet time T3 of the next preset time T1 is the difference between the (number of equally divided N and the (number of free resources k-1) and the time granularity TstepThe product of (a) or (b), i.e. T3 ═ N-k +1) Tstep；
If only the resources in one equal portion are free, no adjustment is made;
if no idle resource exists, the time granularity T is set as the step lengthstepAdjusting the time T2 and the silence time T3 of the data transmission at the next preset time T1 specifically includes: the data transmission time T2 of the next preset time T1 is the current data transmission time and the time granularity TstepThe difference between the two, i.e. T2-T2-Tstep(ii) a The silence time T3 of the next preset time T1 is the current silence time and the time granularity TstepThe sum of (i) T3 ═ T3+ Tstep(ii) a Wherein, the data transmission time T2 of the adjusted next preset time T1 cannot be less than, i.e. greater than or equal to the minimum value T2 of the initial data transmission time T2minIf the data transfer time T2 of the current preset time T1 is equal to the minimum value T2 of the data transfer times T2minIf so, no adjustment is performed;
specifically, if p idle equal-share resources are continuously detected, the quiet period is terminated, and the data transmission time of the next preset time T1 is directly advanced. Here, it is assumed that resources after p consecutive idle equal parts of resources in the original quiet period are also idle, and therefore, the data transmission time of the next preset time T1 is the data transmission time T2 and (the equal division N-m-1) of the current preset time T1 and the time granularity TstepThe sum of the product values of (a) and (b), i.e., T2 ═ T2+ (N-m-1) Tstep(ii) a The quiet time T3 of the next preset time T1 is (m +1) and the quiet timeParticle size TstepThe product value of the product of (a); wherein m is the number of detected non-idle resource equal parts before p idle equal parts of resources are continuously detected, and m + p is assumed here<＝N。
In the manner of adjusting the data transmission time and the silence time within the next preset time in this step, p is a preset value.
If the detection time window W is periodic, continuing to adjust until the period of the detection time window W is ended, and waiting for the arrival of the detection time window of the next week; if the detection time window W is triggered, then the adjustment continues until a re-trigger detection time window is received.
The method solves the coexistence problem of the LTE system and other systems on the shared spectrum, and realizes the normal work of the LTE on the shared spectrum.
Fig. 2 is a schematic structural diagram of a transmission node according to the present invention, as shown in fig. 2, which at least includes a determining module, a data transmission and detection module, and an adjusting module; wherein the content of the first and second substances,
the determining module is used for determining the initial data transmission time and the silent time in the preset time.
The determination module is specifically configured to:
detecting the number of transmission nodes of a first system in a detection time window W, and the number of transmission nodes of other systems and/or detecting the resource vacancy condition of a shared spectrum in the detection time window W; or, detecting the activity condition of the transmission node of other system, the service requirement of the transmission node of the first system and/or the resource idle condition of the shared spectrum in the detection time window W;
determining an initial data transmission time T2 and a quiet time T3, and a minimum value T2 of T2 according to the detected informationmin；
Or, the determining module is specifically configured to: receiving a carrier from a licensed spectrum carrying an initial data transmission time T2 and a quiet time T3, and a minimum value T2 of T2minSignaling of (2).
Or, the determining module is specifically configured to: presetting initial data transmissionTime T2 and silence time T3, and minimum T2 of T2minMinimum T2 of T2, such as T2: T3 ═ 1:1minEqual to the initial T2.
And the data transmission and detection module is used for transmitting data on the shared spectrum in the data transmission time and detecting the resource utilization condition on the shared spectrum in the silent time.
In particular, the amount of the solvent to be used,
the data transmission and detection module is specifically configured to: in the data transmission time T2, the transmission node adopts the existing mechanism of the system to transmit data, at this time, in the data transmission time T2, the transmission node of other systems can not occupy;
further, the start points of the data transmission times T2 of all the transmission nodes of the first system within the network coverage are aligned.
And, the data transmission and detection module is specifically configured to: according to a preset time granularity TstepDividing the quiet time T3 into equal parts; detecting granularity T at each timestepResource utilization on the internal shared spectrum; when a certain time granularity T is detectedstepWhen the signal energy is lower than the preset threshold value, marking the time granularity TstepThe resources within are idle.
And the adjusting module is used for adjusting the data transmission time and the silent time in the next preset time according to the detected resource use condition on the shared spectrum, and outputting the adjusted data transmission time and the adjusted silent time to the data transmission and detection module.
In particular, the amount of the solvent to be used,
the adjustment module is specifically configured to: when the idle resources have k equal parts and k<N times, k idle time granularities TstepAdjusting the data transmission time T2 to the next preset time T1, i.e. T2 ═ T2+ kTstepThe quiet time T3 ═ T3-kTstep；
When the idle resources have k equal parts and k is equal to N, (k-1) idle time granularities TstepAdjusting the data transmission time T2 to the next preset time T1, i.e. T2 ═ T2+ (k-1) TstepSilenceTime T3 ═ Tstep；
When no idle resource exists, no adjustment is carried out; or adjusting the data transmission time T2 to the minimum value T2 of the data transmission time T2minI.e. T2-T2minThe quiet time T3-T1-T2min；
Specifically, if p idle equal parts of resources are continuously detected, the quiet period is terminated, and the data transmission time of the next preset time T1 is advanced. Here, it is assumed that resources after p consecutive idle equal parts of resources in the original quiet period are also idle, and therefore, the data transmission time T2 of the next preset time T1 is T2+ (N-m) TstepWherein m is the number of idle resource equal parts detected before p idle equal parts are continuously detected, and the silent time is T3 mTstepHere, it is assumed that m + p<＝N。
Where p is a preset value.
Alternatively, the first and second electrodes may be,
the adjustment module is specifically configured to: when the idle resources have k equal parts and k>1, then (k-1) time granularity TstepThe time T2 for the next data transmission is adjusted, i.e. T2 ═ T2+ (k-1) TstepThe quiet time T3 ═ N-k +1) Tstep；
When only the resources in one equal part are idle, no adjustment is performed;
when no idle resource exists, the time granularity T is the step lengthstepAdjusting the time T2 and the quiet time T3 for data transmission specifically includes: the data transmission time T2 of the next preset time T1 is the current data transmission time minus a time granularity TstepI.e. T2-T2-Tstep(ii) a The quiet time T3 is the current quiet time plus a time granularity TstepI.e. T3 ═ T3+ Tstep(ii) a Wherein, the adjusted data transmission time T2 cannot be less than the minimum value T2 of the data transmission time T2minIf the current data transfer time T2 is equal to the minimum value T2 of the data transfer time T2minIf so, no adjustment is performed;
in particular, if p idle equal parts of resources are detected consecutively, the muting is terminatedAnd advancing to the data transmission time of the next preset time T1. Here, it is assumed that resources after p consecutive idle equal parts of resources in the original quiet period are also idle, and therefore, the data transmission time T2 ═ T2+ (N-m-1) T of the next preset time T1 is T2 ═ TstepWherein m is the number of the detected non-idle resource equal parts before the p idle equal parts of resources are continuously detected, and the silent time is T3 ═ m +1) TstepHere, it is assumed that m + p<＝N。
Where p is a preset value.
The process of the present invention will be described in detail below with reference to specific examples.
Fig. 3 is a schematic diagram of a first embodiment of the spectrum sharing method according to the present invention, and assuming that the first system is an LTE system in the first embodiment, as shown in fig. 3, the first embodiment provides a schematic diagram of determining the time T2 and the quiet time T3 of data transmission based on the detection window time W, and adjusting the time T2 and the quiet time T3 of data transmission based on the detection result in the quiet time T3.
In the first embodiment, it is assumed that the detection time window W is periodic and the period is T, in the period T, the transmission node of the LTE first detects the number of transmission nodes of the current LTE system and the number of transmission nodes of other non-LTE systems, such as stations of the WIFI system, in the detection time window W, and the minimum transmission time of the LTE system can be determined according to the detected number of transmission nodes of the LTE system and the detected number of stations of the WIFI system. In the first embodiment, assuming that X transmission nodes of the LTE system and Y transmission nodes of the non-LTE system are detected, the minimum allowed LTE data transmission is determined to be T1 within the preset time T1
This value is constant during the period T and serves as a lower limit value for the adjustment of the subsequent data transfer time T2. It should be noted that, it is assumed here that the number of transmission nodes of the LTE system and the number of transmission nodes of other non-LTE systems detected by the transmission nodes of LTE within a certain network coverage are the same.
Meanwhile, in the detection time window W, the resource utilization condition of the shared spectrum can be detected, and an initial data transmission time T2 and a silent time T3 in the period T are obtained, which are respectively represented by LTE-ON and LTE-OFF in fig. 1.
In the first embodiment, if the period of the detection time window W is T, at the beginning of the next period T, the LTE transmission node performs detection again, performs detection again on surrounding transmission nodes, and determines the initial data transmission time T2 and the silence time T3 again within the first preset time T1 of the next period T based on the detected transmission nodes.
It is assumed here that the number of transmission nodes of the LTE system and the number of transmission nodes or traffic of the non-LTE system do not change much in the period T.
In the first embodiment, the preset time T1 may be determined based on the detection time window W, and may also be signaled by a carrier on the licensed spectrum to the transmission node of the first system, where the relation of the preset time T1, the data transmission time T2, and the silence time T3 satisfies: t1 ═ T2+ T3.
The first embodiment provides that initial LTE-ON and LTE-OFF times are determined based ON the number of transmission nodes of the LTE system and the non-LTE system detected within the detection time window W, where LTE-ON corresponds to the data transmission time T2 and LTE-OFF corresponds to the silence time T3. As another embodiment, the initial LTE-ON and LTE-OFF time may also be determined according to statistics of traffic demands in a period of time in an LTE system and a non-LTE system, and the invention is not limited to determining the initial LTE-ON and LTE-OFF time in other manners.
It can be easily seen that, during the second predetermined time T1 shown in the period T in fig. 3, the data transmission time T2 and the quiet time T3 are the data transmission time and the quiet time in the next predetermined time after being adjusted according to the step 102 shown in fig. 1 of the present invention.
Fig. 4 is a schematic diagram of a second embodiment of the spectrum sharing method of the present invention, and assuming that the first system is an LTE system in the second embodiment, as shown in fig. 4, the second embodiment provides an initial data transmission time T2 and a silent time T3, data transmission time T3, and data transmission time T3 for signaling the carrier on the authorized spectrum to the transmission node of LTE according to the present inventionMinimum value T2 of input time T2minAnd a schematic diagram of adjusting the data transmission time T2 and the silence time T3 based on the detection result in the silence time T3, as shown in fig. 4, in the second embodiment, a carrier on the licensed spectrum signals the transmitting node of the LTE to which the carrier belongs about the initial data transmission time T2 and the silence time T3 for allowing LTE data transmission;
in addition, for the initial data transmission time T2 and the silence time T3, preset default values may be adopted for determination, for example, assuming that the preset time T1 is known (as obtained by signaling), the time of the data transmission time T2 and the silence time T3 are equally divided by the preset time T1 according to the ratio of 1:1, and meanwhile, the minimum value T2 of the data transmission time T2 is set in the second embodimentmin＝T2＝T1/2。
It can be easily seen that, during the second preset time T1 shown in the period T in fig. 4, the data transmission time T2 and the quiet time T3 are the data transmission time and the quiet time in the next preset time after being adjusted according to the step 102 shown in fig. 1 of the present invention.
Fig. 5 is a schematic diagram of a third embodiment of the spectrum sharing method of the present invention, and as shown in fig. 5, the third embodiment shows a resource utilization situation on the shared spectrum detected based on the quiet time T3, and the first adjustment manner in step 102 shown in fig. 1 of the present invention is adopted to adjust the data transmission time T2 and the quiet time T3 allowed to perform LTE data transmission in the next preset time T1.
In the third embodiment, first, as shown in fig. 5, it is assumed that the silence time T3 is in terms of time granularity TstepDividing into 10 equal parts; and, assume that the ratio of the initial data transmission time T2 and the silence time T3 obtained from the detection time window W is 10:10 within the current preset time T1, while assuming that T2min＝10Tstep；
In the third embodiment, it is assumed that there are 2 idle resources obtained in the detection of the resource utilization on the shared spectrum, as shown by the hatched equal parts in fig. 5, that is, k is 2, and since k is 2<N is 10, then, within the next preset time T1, according toIn the first adjustment manner, the data transmission time T2 ═ T2+ k × T allowed for LTE data transmissionstep＝T2+2Tstep，T3＝(N-k)*T3/N＝8Tstep(ii) a When the ratio is T2: T3: 12: 8;
then, in the next preset time T1, the transmission node of LTE performs LTE data transmission within the adjusted data transmission time T2, and then performs detection of the shared spectrum resource utilization within the adjusted silence time T3, and further, if there is no idle resource obtained in the continuous detection of the resource utilization on the shared spectrum, the ratio of the data transmission time T2 and the silence time T3 used in the next preset time T1 is kept unchanged in the next preset time T1 according to the first adjustment mode; alternatively, in the next preset time T1, the data transmission time T2 is adjusted to T2minAt this time, T2 ═ T2min＝10Tstep，T3＝T1-T2＝10TstepI.e., T2: t3 ═ 10: 10.
in particular, if the resource utilization on the shared spectrum is detected within the quiet time T3, all the quiet times T3 are idle resources, that is, k is equal to N, and at this time, in order to ensure that the resource utilization on the shared spectrum can be detected, at least an equal portion of time must be left for detection, that is, T3TstepTherefore, in this case, the time of the data transfer time T2 may be adjusted to T2 ═ T2+ (k-1) TstepThe quiet time T3 will be adjusted to T3 ═ Tstep；
Fig. 6 is a schematic diagram of early termination of a quiet period in a third embodiment of the spectrum sharing method of the present invention, as shown in fig. 6, fig. 6 shows an example of early termination of a quiet period. According to the first adjustment, assuming that if it is continuously detected that 3 resources are idle, the resources in the subsequent silent period are considered to be idle, and the silent period can be terminated early and the data transmission time can be entered. As shown in FIG. 6, 3 consecutive equal parts of resources, as indicated by diagonally shaded equal parts, are detected as idle resources during the silent time T3 of the current preset time T1, and 3 consecutive equal parts of resources are detectedWhen there are 1 part of the previous idle resources (as indicated by the hatched equal part of the slash) and 4 parts of the non-idle resources (as indicated by the blank equal part of the slash), the data transmission time T2 in the next preset time T1 is adjusted to be: t2 ═ T2+ (N-m) Tstep＝T2+6TstepThe quiet time T3 is adjusted to: t3 ═ mTstep＝4TstepWhen the ratio of T2 to T3 is 16: 4;
as shown by the dashed line box in fig. 6, according to the adjustment manner shown in fig. 5, the transmitting node of LTE needs to enter the next preset time T1 after the silence period of the current preset time T1 is completely ended, and according to the adjustment manner shown in fig. 5, a person skilled in the art can easily find that the ratio of the data transmission time T2 to the silence time T3 in the next preset time T1 is: t2: t3 ═ 16: 4; however, if the special adjustment manner of early termination shown in fig. 6 is adopted, a new transmission period can be entered directly after 5 idle resources are continuously detected, which is more beneficial to the full utilization of resources.
Fig. 7 is a schematic diagram of a fourth embodiment of the spectrum sharing method of the present invention, and as shown in fig. 7, the fourth embodiment shows a resource utilization situation on the shared spectrum detected based on the quiet time T3, and the second adjustment manner in step 102 shown in fig. 1 of the present invention is adopted to adjust the data transmission time T2 and the quiet time T3 allowed to perform LTE data transmission in the next preset time T1.
In the fourth embodiment, first, as shown in fig. 7, it is assumed that the silence time T3 is in terms of time granularity TstepDividing into 10 equal parts; and, assume that the ratio of the initial data transmission time T2 and the silence time T3 obtained from the detection time window W is 10:10 within the current preset time T1, while assuming that T2min＝10Tstep；
In the fourth embodiment, if it is assumed that there are 3 idle resources obtained in the detection of the resource utilization on the shared spectrum, as shown by the hatched equal parts in fig. 7, that is, k is 3, then in the next preset time T1, the data transmission time T2 allowing LTE data transmission is T2+ (k-1) T in the second adjustment mannerstep＝T2+2Tstep，T3＝(N-k+1)Tstep＝8Tstep(ii) a When the ratio is T2: T3: 12: 8;
next, during the next preset time T1, the LTE transmission node performs LTE data transmission within the adjusted data transmission time T2, and then performs detection of the shared spectrum resource utilization within the adjusted silence time T3, and further, assuming that there are no idle resources obtained in the subsequent detection of the resource utilization on the shared spectrum, according to the first adjustment method, the data transmission time T2 and the silence time T3 are respectively adjusted by using Tstep as a step length within the next preset time T1, that is, T2 is T2-T38step＝11Tstep，T3＝T3+Tstep＝9TstepAt this time, T2: T3 is 11: 9.
Fig. 8 is a schematic diagram of the early termination of the quiet period in the fourth embodiment of the spectrum sharing method of the present invention, as shown in fig. 8, fig. 8 shows an example of the early termination of the quiet period. According to the second adjustment mode, if it is continuously detected that 3 equal parts of resources are idle, the resources in the subsequent silent period are considered to be idle, and the silent period can be terminated early and the data transmission time can be entered. As shown in fig. 8, 3 consecutive equal parts of idle resources, as shown by diagonally shaded equal parts, are detected in the silence time T3 of the current preset time T1, and 1 part of idle resources (as shown by diagonally shaded equal parts) and 4 parts of non-idle resources (as shown by blank equal parts) are detected before 5 consecutive equal parts of resources are detected, at this time, the data transmission time T2 in the next preset time T1 is adjusted to: t2 ═ T2+ (N-m-1) Tstep＝T2+5TstepThe quiet time T3 is adjusted to: t3 ═ m +1) Tstep＝5TstepAt this time, T2: T3 is 15: 5.
As shown by the dashed line box in fig. 8, according to the adjustment manner shown in fig. 7, the transmitting node of LTE needs to enter the next preset time T1 after the silence period of the current preset time T1 is completely ended, and according to the adjustment manner shown in fig. 7, a person skilled in the art can easily find that the ratio of the data transmission time T2 to the silence time T3 in the next preset time T1 is: t2: t3 ═ 15: 5; however, if the special adjustment manner of early termination shown in fig. 8 is adopted, a new transmission period can be entered directly after 5 idle resources are continuously detected, which is more beneficial to the full utilization of resources.
The above description is only a preferred example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (21)
1. A method for spectrum sharing, comprising: the transmission node determines initial data transmission time and silent time in preset time;
the transmission node transmits data on the shared spectrum in the data transmission time, and detects the resource utilization condition on the shared spectrum in the silent time;
adjusting the data transmission time and the silence time within the next preset time according to the detected resource utilization condition on the shared frequency spectrum;
the preset time T1 is determined based on a detection time window W; or the preset time T1 is signaled to the transmitting node by a carrier on the licensed spectrum;
wherein the preset time T1 is equal to the sum of the initial data transmission time T2 and the silence time T3;
the detecting the resource utilization on the shared spectrum in the silent period specifically includes:
according to a preset time granularity TstepDividing the silent time T3 into several equal parts, each time granularity TstepThe time length of the equal part is equal to the time granularity Tstep；
Detecting granularity T at each timestepResource utilization on the internal shared spectrum;
when a certain time granularity T is detectedstepWhen the signal energy is lower than the preset threshold value, marking the time granularity TstepThe resources within are idle.
2. The method for spectrum sharing according to claim 1, wherein the determining the data transmission time and the silence time within the preset time comprises:
detecting the number of transmission nodes of a system to which the transmission nodes belong, the number of transmission nodes of other systems except the system to which the transmission nodes belong and/or the resource vacancy condition of a shared frequency spectrum in a detection time window W;
determining the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2 according to the detected informationmin；
Alternatively, the first and second electrodes may be,
detecting the activity condition of transmission nodes of other systems except the system to which the transmission node belongs, the service requirement of the transmission nodes of the system to which the transmission nodes belong and/or the resource idle condition of the shared spectrum in a detection time window W;
determining the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2 according to the detected informationmin。
3. The spectrum sharing method according to claim 1 or 2, wherein the detection time window W comprises the silence time; alternatively, the detection time window W is preset.
4. The spectrum sharing method according to claim 2, wherein the detection time window W is periodic, and the period size is configured or preset by signaling by a carrier on the licensed spectrum;
or, the detection time window W is triggered, and the transmission node is triggered to perform re-detection by a carrier on a licensed spectrum.
5. The method for spectrum sharing according to claim 1, wherein the determining the data transmission time and the silence time within the preset time comprises:
signaling the initial data transmission time T2 and the silence time T3, and the minimum value T2 of the initial data transmission time T2 by carriers on a licensed spectrumminAnd informing the transmission node.
6. The method for spectrum sharing according to claim 1, wherein the determining the data transmission time and the silence time within the preset time comprises:
the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2minIs a preset default value;
wherein the preset time T1 is equal to the sum of the initial data transmission time T2 and the silence time T3, the ratio of the data transmission time T2 to the silence time T3 is 1:1, and the minimum value T2 of the initial data transmission time T2minEqual to the initial data transfer time T2.
7. The spectrum sharing method according to claim 1, wherein during the data transmission time T2, the transmitting node performs data transmission using an existing mechanism of a system to which the transmitting node belongs;
during the data transmission time T2, the transmission node of the system other than the system to which the transmission node belongs cannot occupy.
8. The spectrum sharing method according to claim 7, wherein starting points of data transmission times T2 of all transmission nodes of the system to which the transmission nodes belong are aligned within a network coverage.
9. The method according to claim 1, wherein when it is detected that there is a resource idle in the quiet time T3, the adjusting the data transmission time and the quiet time in the next preset time comprises:
if the idle resources have k equal parts and k<N, granularity T of k idle timestepData transmission time T2 adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 of the current preset time T1, the number k of idle resources and the time granularity TstepThe sum of the product values of the products of (a) and (b), and,
the silence time of the next preset time T1 is the silence time T3 of the current preset time T1, the number k of idle resources and the time granularity TstepThe difference of the product values of the products of (a);
or if the idle resources have k equal parts and k is equal to N, (k-1) idle time granularities TstepData transmission time T2 adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepAnd the silence time T3 of the next preset time T1 is the time granularity Tstep；
Or if no free resources exist, no adjustment is carried out; or, adjusting the data transmission time T2 of the next preset time T1 to the minimum value T2 of the data transmission time T2 of the current preset time T1min(ii) a The silence time T3 of the next preset time T1 is the minimum value T2 of the data transmission time T2 of the preset time T1 and the current preset time T1minA difference value of the difference;
wherein the plurality of equal parts are N equal parts.
10. The method according to claim 1, wherein when it is detected that there is a resource idle in the quiet time T3, the adjusting the data transmission time and the quiet time in the next preset time comprises:
if p preset idle equal parts of resources are continuously detected, directly entering the data transmission time of the next preset time T1;
the data transmission time T2 of the next preset time T1 is the current preset time T1With (the number of divisions N-m) and the time granularity T of the data transmission time T2stepThe sum of the product values of the products of (a);
the silence time T3 of the next preset time T1 is m and the silence time granularity TstepThe product value of the product of (a);
wherein m is the number of the detected non-idle equal parts of resources before the p idle equal parts of resources are continuously detected; and m + p < ═ N.
11. The method according to claim 1, wherein when it is detected that there is a resource idle in the quiet time T3, the adjusting the data transmission time and the quiet time in the next preset time comprises:
if the idle resources have k equal parts and k>1, (k-1) idle time granularity TstepTime T2 of data transmission adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepAnd the silence time T3 of the next preset time T1 is (difference between the number of equally divided N and the difference between the number of idle resources k-1) and the time granularity TstepThe product value of the product of (a);
or if only the resources in one equal part are idle, no adjustment is performed;
or, if there is no idle resource, the time granularity T is the step lengthstepAdjusting time T2 and quiet time T3 of data transmission of the next preset time T1:
the data transmission time T2 of the next preset time T1 is the current data transmission time and the time granularity TstepA difference value of the difference; the silence time T3 of the next preset time T1 is the current silence time T3 and the time granularity TstepThe sum of the sums thereof; wherein the data transmission time T2 of the next preset time T1 is greater than or equal to the minimum value T2 of the initial data transmission time T2min(ii) a If the data transmission time T2 of the current preset time T1 is equal to the minimum value T2 of the data transmission time T2minThen no adjustment is made.
12. The method according to claim 1, wherein when it is detected that there is a resource idle in the quiet time T3, the adjusting the data transmission time and the quiet time in the next preset time comprises:
if p preset idle equal parts of resources are continuously detected, directly entering the data transmission time of the next preset time T1;
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the even number N-m-1) of the current preset time T1 and the time granularity TstepThe sum of the product values of the products of (a);
the silence time T3 of the next preset time T1 is (m +1) and the silence time granularity TstepThe product value of the product of (a);
wherein m is the number of the detected non-idle equal parts of resources before the p idle equal parts of resources are continuously detected; and m + p < ═ N.
13. A transmission node is characterized by at least comprising a determining module, a data transmission and detection module and an adjusting module; wherein the content of the first and second substances,
the device comprises a determining module, a transmitting module and a receiving module, wherein the determining module is used for determining initial data transmission time and silent time in preset time;
the data transmission and detection module is used for transmitting data on the shared spectrum in data transmission time and detecting the resource utilization condition on the shared spectrum in silent time;
the adjusting module is used for adjusting the data transmission time and the silent time in the next preset time according to the detected resource utilization condition on the shared spectrum, and outputting the adjusted data transmission time and the adjusted silent time to the data transmission and detection module;
the preset time T1 is determined based on a detection time window W; or the preset time T1 is signaled to the transmitting node by a carrier on the licensed spectrum;
wherein the preset time T1 is equal to the sum of the initial data transmission time T2 and the silence time T3;
the data transmission and detection module is specifically configured to:
in the data transmission time T2, the transmission node adopts the existing mechanism of the system to which the transmission node belongs to carry out data transmission; during the data transmission time T2, a transmission node of a system other than the system to which the transmission node belongs cannot occupy;
according to a preset time granularity TstepDividing the quiet time T3 into a plurality of equal parts; detecting granularity T at each timestepResource utilization on the internal shared spectrum; when a certain time granularity T is detectedstepWhen the signal energy is lower than the preset threshold value, marking the time granularity TstepThe resources within are idle.
14. The transmission node of claim 13, wherein the determining module is specifically configured to:
detecting the number of transmission nodes of a system to which the transmission nodes belong, the number of transmission nodes of other systems except the system to which the transmission nodes belong and/or the resource vacancy condition of a shared frequency spectrum in a detection time window W; or, detecting the activity condition of the transmission node of other systems except the system to which the transmission node belongs, the service requirement of the transmission node of the system to which the transmission node belongs and/or the resource idle condition of the shared spectrum in the detection time window W;
determining the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2 according to the detected informationmin。
15. The transmission node of claim 13, wherein the determining module is specifically configured to: receiving a data transmission time T carrying the initial data from a carrier on a licensed frequency spectrum2 and a silence time T3, and a minimum value T2 of the initial data transmission time T2minSignaling of (2).
16. The transmission node of claim 13, wherein the determining module is specifically configured to: presetting the initial data transmission time T2 and the quiet time T3, and the minimum value T2 of the initial data transmission time T2min。
17. The transmission node according to claim 13, wherein the starting points of the data transmission times T2 of all transmission nodes of the system to which the transmission node belongs are aligned within the network coverage.
18. The transmission node of claim 13, wherein the adjusting module is specifically configured to:
when the idle resources have k equal parts and k<N times, k idle time granularities TstepData transmission time T2 adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 of the current preset time T1, the number k of idle resources and the time granularity TstepThe sum of the product values of the products of (a) and (b), and,
the silence time of the next preset time T1 is the silence time T3 of the current preset time T1, the number k of idle resources and the time granularity TstepThe difference of the product values of the products of (a);
when the idle resources have k equal parts and k is equal to N, (k-1) idle time granularities TstepData transmission time T2 adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepAnd the silence time T3 of the next preset time T1 is the time granularity Tstep；
When not idleIf the resource is not adjusted; or, adjusting the data transmission time T2 of the next preset time T1 to the minimum value T2 of the data transmission time T2 of the current preset time T1min(ii) a The silence time T3 of the next preset time T1 is the minimum value T2 of the data transmission time T2 of the preset time T1 and the current preset time T1minA difference value of the difference;
wherein the plurality of equal parts are N equal parts.
19. The transmission node of claim 13, wherein the adjusting module is specifically configured to:
when p idle equal parts of resources are continuously detected, directly entering the data transmission time of the next preset time T1, wherein the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (equal number N-m) of the current preset time T1 and the time granularity TstepThe sum of the product values of the products of (a);
the silence time T3 of the next preset time T1 is m and the silence time granularity TstepThe product value of the product of (a);
wherein m is the number of the detected non-idle equal parts of resources before the p idle equal parts of resources are continuously detected; and m + p < ═ N.
20. The transmission node of claim 13, wherein the adjusting module is specifically configured to:
when the idle resources have k equal parts and k>1 hour, (k-1) idle time granularity TstepTime T2 of data transmission adjusted to the next preset time T1:
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the number of free resources k-1) of the current preset time T1 and the time granularity TstepAnd the silence time T3 of the next preset time T1 is (difference between the number of equally divided N and the difference between the number of idle resources k-1) and the time granularity TstepThe product value of the product of (a);
or, when only the resources in one equal part are idle, no adjustment is performed;
or, when there is no idle resource, the time granularity T is the step lengthstepAdjusting time T2 and quiet time T3 of data transmission of the next preset time T1:
the data transmission time T2 of the next preset time T1 is the current data transmission time and the time granularity TstepA difference value of the difference; the silence time T3 of the next preset time T1 is the current silence time T3 and the time granularity TstepThe sum of the sums thereof; wherein the data transmission time T2 of the next preset time T1 is greater than or equal to the minimum value T2 of the initial data transmission time T2min(ii) a If the data transmission time T2 of the current preset time T1 is equal to the minimum value T2 of the data transmission time T2minThen no adjustment is made.
21. The transmission node of claim 13, wherein the adjusting module is specifically configured to:
when p preset idle equal parts of resources are continuously detected, directly entering the data transmission time of the next preset time T1;
the data transmission time T2 of the next preset time T1 is the data transmission time T2 and (the even number N-m-1) of the current preset time T1 and the time granularity TstepThe sum of the product values of the products of (a);
the silence time T3 of the next preset time T1 is (m +1) and the silence time granularity TstepThe product value of the product of (a);
wherein m is the number of the detected non-idle equal parts of resources before the p idle equal parts of resources are continuously detected; and m + p < ═ N.
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| CN201410465622.1A CN105407489B (en) | 2014-09-12 | 2014-09-12 | Spectrum sharing method and transmission node |
| PCT/CN2015/079619 WO2016037495A1 (en) | 2014-09-12 | 2015-05-22 | Spectrum sharing method and transmission node |
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| CN201410465622.1A CN105407489B (en) | 2014-09-12 | 2014-09-12 | Spectrum sharing method and transmission node |
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| CN112532310B (en) * | 2020-12-21 | 2022-11-15 | 国网浙江省电力有限公司信息通信分公司 | Satellite emergency communication and ubiquitous satellite Internet of things spectrum sharing method and device |
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| CN102215076A (en) * | 2011-06-09 | 2011-10-12 | 电信科学技术研究院 | Spectrum sensing triggering and realization methods, systems and equipment |
| CN102648646A (en) * | 2009-12-02 | 2012-08-22 | 高通股份有限公司 | Apparatus and methods for spectrum sharing using listen-before-talk with quiet periods |
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| CN102648646A (en) * | 2009-12-02 | 2012-08-22 | 高通股份有限公司 | Apparatus and methods for spectrum sharing using listen-before-talk with quiet periods |
| CN102215076A (en) * | 2011-06-09 | 2011-10-12 | 电信科学技术研究院 | Spectrum sensing triggering and realization methods, systems and equipment |
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