CN106572474B

CN106572474B - Method and device for PDCCH scheduling and power adjustment of frequency band sharing network

Info

Publication number: CN106572474B
Application number: CN201510648339.7A
Authority: CN
Inventors: 韩亚洁; 陈琼; 秦洪峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-10-09
Filing date: 2015-10-09
Publication date: 2020-12-11
Anticipated expiration: 2035-10-09
Also published as: CN106572474A; WO2016197990A1

Abstract

The invention provides a method and a device for PDCCH (physical downlink control channel) scheduling and power adjustment of a frequency band sharing network, wherein the method comprises the following steps: acquiring frequency band occupation information and signal transmission power information of a second wireless communication network in a shared frequency band, screening a PCI according to the frequency band occupation information, and mapping the PCFICH and the PHICH to a frequency band outside the shared frequency band; according to the current PCI, counting the number distribution of REs in the shared frequency band in the schedulable CCE; adjusting the polymerization degree of the scheduling DCI and determining the minimum interference candidate level by combining the number distribution, and scheduling the DCI; and adjusting the transmitting power of the DCI according to the minimum interference candidate level and the signal transmitting power information. The invention regulates the DCI by regulating the polymerization degree of the DCI and regulates the scheduling and transmitting power of the DCI, so that the performance of the PDCCH of the LTE in the band sharing network is stable, the downlink communication quality of the LTE is ensured, and the communication of the band sharing network is efficient and reliable.

Description

Method and device for PDCCH scheduling and power adjustment of frequency band sharing network

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for PDCCH scheduling and power adjustment in a frequency band shared network.

Background

With the development of wireless communication technology, efficient utilization of limited network spectrum has become a problem for wireless communication. The network spectrum sharing is an application for realizing shared spectrum allocation between the operator a and the different operator B. However, network sharing may cause problems, mainly referring to mutual interference of two networks. Currently, an LTE (Long Term Evolution) network also has an application of sharing a network spectrum, such as network band sharing of the LTE and a GSM (Global System for Mobile Communication) network. GSM is mainly voice communication and is a priority high network; LTE is primarily data communication. In GL (GSM & LTE) shared band procedure, GSM causes interference to LTE when there is overlapping band between GSM and LTE. The LTE traffic channel can avoid interference through scheduling, but the downlink control channel cannot be completely avoided, thereby affecting the communication quality of LTE.

An existing PDCCH (Physical Downlink Control Channel) Channel is transmitted in a plurality of formats, i.e., DCI format, and carries scheduling and Control information of a PDSCH (Physical Downlink Shared Channel) Channel, such as a transmission format, resource allocation, and uplink scheduling grant of the PDSCH. The PDCCH adopts CCE (Control Channel Element) as a unit for scheduling, so that DCI (Downlink Control Information) of different users has different code rates, and adaptive scheduling is completed; interleaving operation is adopted before PDCCH channel resource mapping, so that DCI of one user is scattered and mapped on the whole frequency band, the frequency selection gain of the PDCCH channel is enhanced, and the robustness of a control channel is improved.

In spectrum sharing networks, a heterogeneous network such as a GSM network may cause interference to LTE. Due to the particularity of PDCCH channel mapping, it cannot completely avoid interference. This may have an impact on LTE downlink communications.

Disclosure of Invention

The invention aims to provide a method for scheduling and power adjustment of a Physical Downlink Control Channel (PDCCH) of a frequency band shared network, which is used for solving the problem that in the prior art, when an LTE network and a different network share a network frequency band, the different network causes interference to the LTE network, particularly interference to the PDCCH, so that the communication quality of the LTE is influenced, so that the performance of the PDCCH of the LTE in the frequency band shared network is stable, the downlink communication quality of the LTE in a shared frequency band is ensured, and the communication of the frequency band shared network is efficient and reliable.

In order to achieve the above object, an embodiment of the present invention provides a method for PDCCH scheduling and power adjustment in a band-shared network, including:

the method comprises the steps that a first wireless communication network obtains frequency band occupation information and signal transmission power information of a second wireless communication network in a shared frequency band, and a physical layer cell identity (PCI) is screened according to the frequency band occupation information, so that a downlink control indication channel (PCFICH) and a physical hybrid automatic repeat request (HARQ) indication channel (PHICH) are mapped to a frequency band outside the shared frequency band;

counting the number distribution Hist (CCE) of resource elements RE in the schedulable control channel elements CCE in the shared frequency band according to the PCI of the current cell;

adjusting the polymerization degree of Downlink Control Information (DCI) to determine the minimum interference candidate level by combining with the Hist (CCE), and scheduling the DCI; the minimum interference candidate level is a candidate level with zero number of corresponding REs under the polymerization degree or a candidate level with minimum number of corresponding REs and minimum occupied proportion under the respective polymerization degree;

and adjusting the transmitting power of the DCI according to the minimum interference candidate level and the signal transmitting power information.

Wherein the aggregation level is the number of the CCEs, one CCE corresponds to 36 REs, and each aggregation level corresponds to the determined candidate level number; the candidate level is the position of the CCE selectable under the corresponding polymerization degree.

The step of adjusting the polymerization degree of the scheduling downlink control information DCI and determining the minimum interference candidate level by combining the Hist (CCE), and scheduling the DCI comprises the following steps:

adjusting the polymerization degree of Downlink Control Information (DCI) to determine a zero interference candidate level by combining with the Hist (CCE), and scheduling the DCI;

and when the zero interference candidate level does not exist, determining a minimum interference candidate level and scheduling the DCI.

The step of adjusting the polymerization degree of the scheduling downlink control information DCI, determining the zero-interference candidate level by combining the Hist (CCE), and scheduling the DCI comprises the following steps:

determining the polymerization degree of the scheduling DCI according to the near-far point characteristic of User Equipment (UE) in the frequency band sharing network, wherein the polymerization degree corresponds to the determined number of candidate levels;

and (5) counting the number of REs in each candidate level by combining the Hist (CCE), determining the number of zero-interference candidate levels, and scheduling the DCI.

Wherein, the step of counting the number of REs in each candidate level in combination with the hist (cce), determining the number of zero-interference candidate levels, and scheduling the DCI includes:

forming a number set RQ by taking the number of REs in each candidate level in the determined number of candidate levels as elements, and counting the elements with the value of 0 in the RQ, wherein the candidate level corresponding to the elements with the value of 0 in the RQ is a zero-interference candidate level;

when the number of the elements is larger than 1, determining that the number of zero interference candidate levels is multiple, and selecting any one of the zero interference candidate levels to schedule the DCI;

when the number of the elements is equal to 1, determining that a zero interference candidate level is unique, and selecting the zero interference candidate level to schedule the DCI;

when the number of the elements is equal to 0 and zero interference candidate levels are determined to be absent, the polymerization degree is reduced, the number of REs in each candidate level in the candidate levels with the determined number is used as an element to form a number set RQ, the elements with the internal value of 0 in the RQ are counted, and the candidate level corresponding to the element with the internal value of 0 in the RQ is a zero interference candidate level step.

Wherein, when the zero interference candidate level does not exist, determining a minimum interference candidate level and scheduling the DCI includes:

when the polymerization degree is reduced to the minimum value of 1 and the zero interference candidate level does not exist, counting the candidate level with the minimum number of corresponding REs under each polymerization degree, and calculating the proportion of the REs with the minimum number under each polymerization degree;

and determining the candidate level with the smallest polymerization degree as the minimum interference candidate level, and scheduling the DCI.

The embodiment of the present invention further provides a device for PDCCH scheduling and power adjustment of a band-shared network, including:

a screening module, configured to acquire band occupation information and signal transmission power information of a second wireless communication network in a shared band, and screen a physical layer cell identity PCI according to the band occupation information, so that a downlink control indicator channel PCFICH and a physical HARQ indicator channel PHICH are mapped to a band outside the shared band;

a counting module, configured to count, according to the PCI of the current cell, the number distribution hist (CCE) of resource elements REs in a schedulable control channel element CCE in the shared frequency band;

a determining module, configured to adjust a degree of polymerization of scheduling downlink control information DCI, determine a minimum interference candidate level in combination with the hist (cce), and schedule the DCI; the minimum interference candidate level is a candidate level with zero number of corresponding REs under the polymerization degree or a candidate level with minimum number of corresponding REs and minimum occupied proportion under the respective polymerization degree;

and the power adjusting module is used for adjusting the transmitting power of the DCI according to the minimum interference candidate level and the signal transmitting power information.

Wherein the determining module comprises:

the zero interference determining submodule is used for adjusting the polymerization degree of the scheduling downlink control information DCI, determining a zero interference candidate level by combining the Hist (CCE), and scheduling the DCI;

and the minimum interference determining submodule is used for determining a minimum interference candidate level and scheduling the DCI when the zero interference candidate level does not exist.

Wherein the zero interference determination submodule comprises:

the system comprises a polymerization degree determining unit, a scheduling DCI scheduling unit and a scheduling DCI scheduling unit, wherein the polymerization degree determining unit is used for determining the polymerization degree of the scheduling DCI according to the near-far point characteristic of User Equipment (UE) in a frequency band sharing network, and the polymerization degree corresponds to the determined number of candidate levels;

and a zero interference determining unit, configured to, in combination with the hist (cce), count the number of REs in each candidate level, determine the number of zero interference candidate levels, and schedule the DCI.

Wherein the zero interference determination unit includes:

a counting subunit, configured to form a number set RQ with the number of REs in each candidate level in the determined number of candidate levels as an element, and count an element with an internal value of 0 in the RQ, where a candidate level corresponding to the element with the internal value of 0 in the RQ is a zero-interference candidate level;

a first zero interference determining subunit, configured to determine that there are multiple zero interference candidate levels when the number of the elements is greater than 1, and select any one of the zero interference candidate levels to schedule the DCI;

a second zero interference determining subunit, configured to determine that a zero interference candidate level is unique when the number of elements is equal to 1, and select the zero interference candidate level to schedule the DCI;

and the polymerization degree adjusting subunit is used for reducing the polymerization degree and entering the execution step of the counting subunit when the number of the elements is equal to 0 and the zero interference candidate level is determined not to exist.

Wherein the minimum interference determination submodule comprises:

the statistical calculation unit is used for reducing the polymerization degree to the minimum value 1 and counting the candidate level with the minimum number of corresponding REs under each polymerization degree when the zero-interference candidate level does not exist, and calculating the proportion of the REs with the minimum number under each polymerization degree;

and the minimum interference determining unit is used for determining the candidate level with the minimum polymerization degree as the minimum interference candidate level and scheduling the DCI.

An embodiment of the present invention further provides a network side device, including the apparatus for PDCCH scheduling and power adjustment of the band sharing network described in the foregoing embodiment.

The technical scheme of the invention has the following beneficial effects:

in the above scheme of the present invention, the minimum interference candidate level is determined by adjusting the polymerization degree of the scheduling downlink control information and combining the counted number distribution of resource elements in the schedulable control channel elements in the shared frequency band, so that the scheduling and the transmission power adjustment are performed on the downlink control information in the PDCCH, and the interference of a different network to the LTE network, especially the interference to the physical downlink control channel PDCCH, when the LTE network and the different network share the network frequency band is reduced, so that the performance of the PDCCH of the LTE in the frequency band shared network is stable, the downlink communication quality of the LTE in the shared frequency band is ensured, and the communication of the frequency band shared network is efficient and reliable.

Drawings

Fig. 1 is a first diagram illustrating a basic step of a method for PDCCH scheduling and power adjustment in a band-shared network according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a PDCCH scheduling and power adjusting apparatus of a band-shared network according to an embodiment of the present invention;

fig. 3 is a third table showing a correspondence between the aggregation level and the number of candidate levels of the PDCCH of the frequency band shared network according to the embodiment of the present invention;

fig. 4 is a fourth schematic flowchart of a method for PDCCH scheduling and power adjustment of a band-shared network according to an embodiment of the present invention;

fig. 5 is a fifth specific application diagram of the PDCCH scheduling and power adjustment method of the band-shared network according to the embodiment of the present invention;

fig. 6 is a sixth specific application diagram of the PDCCH scheduling and power adjustment method of the band-shared network according to the embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The invention aims at the problem that the communication quality of LTE is affected by the interference of different networks on the LTE network, particularly the physical downlink control channel PDCCH, when the LTE network and the different networks are shared in the network frequency band in the prior art, and provides a PDCCH scheduling and power adjusting method of a frequency band sharing network, which determines the minimum interference candidate level by adjusting the polymerization degree of scheduling downlink control information and combining the counted number distribution of resource elements in the schedulable control channel elements in the shared frequency band, thereby carrying out scheduling and emission power adjustment on the downlink control information in the PDCCH, reducing the interference of the different networks on the LTE network, particularly the physical downlink control channel PDCCH, when the LTE network and the different networks are shared in the network frequency band, stabilizing the performance of the PDCCH of the LTE in the frequency band sharing network, and ensuring the downlink communication quality of the LTE in the shared frequency band, thereby making the band-shared network communication efficient and reliable.

First embodiment

As shown in fig. 1, an embodiment of the present invention provides a method for PDCCH scheduling and power adjustment in a band-shared network, including:

step 11, the first wireless communication network acquires the frequency band occupation information and the signal transmission power information of the second wireless communication network in the shared frequency band, and screens the physical layer cell identity PCI according to the frequency band occupation information so as to map the downlink control indication channel PCFICH and the physical HARQ indication channel PHICH to the frequency band outside the shared frequency band;

step 12, according to the PCI of the current cell, counting the number distribution hist (CCE) of resource elements RE in the schedulable control channel element CCE in the shared frequency band;

step 13, adjusting the polymerization degree of the scheduling downlink control information DCI, determining the minimum interference candidate level by combining the Hist (CCE), and scheduling the DCI; the minimum interference candidate level is a candidate level with zero number of corresponding REs under the polymerization degree or a candidate level with minimum number of corresponding REs and minimum occupied proportion under the respective polymerization degree;

and step 14, adjusting the transmitting power of the DCI according to the minimum interference candidate level and the signal transmitting power information.

According to the method for scheduling and adjusting the power of the PDCCH of the band-shared network, the degree of polymerization of the downlink control information is adjusted, and the minimum interference candidate level is determined by combining the counted number distribution of the resource elements in the schedulable control channel elements in the shared band, so that the downlink control information in the PDCCH is scheduled and the transmission power is adjusted, the interference of a different network to the LTE network, particularly the physical downlink control channel PDCCH, is reduced when the LTE network and the different network share the network band, the performance of the PDCCH of the LTE in the band-shared network is stable, the downlink communication quality of the LTE in the shared band is ensured, and the communication of the band-shared network is efficient and reliable.

Specifically, in step 13 of the embodiment of the present invention, the aggregation levels are the numbers of the CCEs, where one CCE corresponds to 36 REs, and each aggregation level corresponds to a determined candidate level number; the candidate level is the position of the CCE selectable under the corresponding polymerization degree.

Here, the aggregation degree value set is different according to the space of DCI mapping. There is a corresponding number of candidate levels at each degree of aggregation, as shown in FIG. 3.

In the embodiment of the present invention, the step 13 may further include:

step 131, adjusting the polymerization degree of the scheduling downlink control information DCI, determining a zero-interference candidate level in combination with the hist (cce), and scheduling the DCI;

step 132, when the zero interference candidate level does not exist, determining a minimum interference candidate level, and scheduling the DCI.

The step 131 may further include:

step 1311, determining a degree of polymerization of the scheduling DCI according to a near-far point characteristic of the UE in the frequency band shared network, where the degree of polymerization corresponds to the determined number of candidate levels;

step 1312, in combination with the hist (cce), counting the number of REs in each candidate level, determining the number of zero-interference candidate levels, and scheduling the DCI.

Further, the step 1312 may include:

step 13121, forming a number set RQ by using the number of REs in each candidate level in the determined number of candidate levels as an element, and counting the elements with the internal value of 0 in the RQ, where the candidate level corresponding to the element with the internal value of 0 in the RQ is a zero-interference candidate level;

step 13122, when the number of the elements is greater than 1, determining that there are multiple zero interference candidate levels, and selecting any one of the zero interference candidate levels to schedule the DCI;

step 13123, when the number of elements is equal to 1, determining that a zero interference candidate level is unique, and selecting the zero interference candidate level to schedule the DCI;

step 13124, when the number of the elements is equal to 0, and it is determined that a zero interference candidate level does not exist, the polymerization degree is reduced, a number set RQ is formed by taking the number of REs in each candidate level in the determined number of candidate levels as elements, and an element with an internal value of 0 in the RQ is counted, where the candidate level corresponding to the element with an internal value of 0 in the RQ is a zero interference candidate level step 13121.

In the embodiment of the present invention, the step 132 may further include:

step 1321, when the polymerization degree is reduced to the minimum value of 1 and the zero interference candidate level does not exist, counting the candidate level with the minimum number of corresponding REs under each polymerization degree, and calculating the proportion of the REs with the minimum number under each polymerization degree;

step 1322, determining the candidate level with the smallest polymerization degree as the minimum interference candidate level, and scheduling the DCI.

According to the method for scheduling and adjusting the power of the PDCCH of the band-shared network, the polymerization degree of the downlink control information is adjusted, and the minimum interference candidate level is determined by combining the counted number distribution of the resource elements in the schedulable control channel elements in the shared frequency band, so that the scheduling and the adjustment of the transmitting power of the downlink control information in the PDCCH are performed, the interference of a different network to the LTE network when the LTE network and the different network share the network frequency band is reduced, particularly the interference to the PDCCH of a physical downlink control channel, the performance of the PDCCH of the LTE in the band-shared network is stable, the downlink communication quality of the LTE in the shared frequency band is ensured, and the communication of the band-shared network is efficient and reliable.

Second embodiment

As shown in fig. 2, an embodiment of the present invention further provides an apparatus for PDCCH scheduling and power adjustment in a frequency band shared network, including:

a screening module 21, configured to acquire band occupation information and signal transmission power information of a shared band in a second wireless communication network, and screen a physical layer cell identity PCI according to the band occupation information, so that a downlink control indicator channel PCFICH and a physical HARQ indicator channel PHICH are mapped to a band outside the shared band;

a counting module 22, configured to count, according to the PCI of the current cell, the number distribution hist (CCE) of resource elements REs in the schedulable control channel element CCE in the shared frequency band;

a determining module 23, configured to adjust a degree of polymerization of the scheduling downlink control information DCI, determine, in combination with the hist (cce), a minimum interference candidate level, and schedule the DCI; the minimum interference candidate level is a candidate level with zero number of corresponding REs under the polymerization degree or a candidate level with minimum number of corresponding REs and minimum occupied proportion under the respective polymerization degree;

and a power adjustment module 24, configured to adjust the transmission power of the DCI according to the minimum interference candidate level and the signal transmission power information.

Specifically, the aggregation level in the determining module 23 is the number of the CCEs, where one CCE corresponds to 36 REs, and each aggregation level corresponds to the determined candidate level number; the candidate level is the position of the CCE selectable under the corresponding polymerization degree.

In the embodiment of the present invention, the determining module 23 specifically includes:

The zero interference determination submodule specifically includes:

The zero interference determination unit specifically includes:

The minimum interference determining submodule in the embodiment of the present invention specifically includes:

The device for scheduling and power adjustment of the PDCCH of the band-shared network determines the minimum interference candidate level by adjusting the polymerization degree of the scheduling downlink control information and combining the counted number distribution of the resource elements in the schedulable control channel elements in the shared band, thereby scheduling and transmitting power adjustment of the downlink control information in the PDCCH, reducing the interference of different networks to the LTE network when the LTE network and the different networks share the network band, particularly the interference to the PDCCH of a physical downlink control channel, stabilizing the performance of the PDCCH of the LTE in the band-shared network, ensuring the downlink communication quality of the LTE in the shared band, and enabling the communication of the band-shared network to be efficient and reliable.

Third embodiment

Fig. 4 is a schematic flowchart of a PDCCH scheduling and power adjustment method of a band-shared network according to an embodiment of the present invention.

The following describes the PDCCH scheduling and power adjustment method of the frequency band sharing network in detail with reference to the specific working flow diagram. The method specifically comprises the following steps:

step S101: according to the frequency band information shared by different networks, the PCI is screened by the LTE, so that the PCFICH and the PHICH avoid the interference of the different networks;

specifically, the different network refers to a second wireless communication network, and the LTE refers to a first wireless communication network;

here, LTE obtains the frequency band occupation of the heterogeneous wireless network through a shared frequency band network element, and avoids PCFICH and PHICH channels from falling into a shared frequency band by screening PCIs, thereby ensuring the performance of the two channels;

specifically, the LTE downlink control indication channel PCFICH and the physical HARQ indication channel PHICH are segmented in resource mapping, the mapping position is related to the physical layer cell identifier PCI, the mapping of the two channels can avoid the interference frequency band of a different network by screening the PCI, and the performance of the two downlink physical channels is ensured;

here, the PCFICH is used to notify the UE of the size of the control region of the corresponding downlink subframe, that is, the number of OFDM symbols occupied by the control region. Or, the PCFICH is used to indicate the number of OFDM symbols used for transmitting the PDCCH in one downlink subframe.

Step S102: counting the number Hist (CCE) of REs of each CCE of the PDCCH in each transmission time interval TTI, wherein the number Hist (CCE) of the REs falls into an interference region;

specifically, according to the network management configuration network parameters of LTE, including bandwidth, CFI indicated by symbols occupied by control channels, and group configuration parameters Ng of PHICH, LTE calculates the number distribution hist (CCE) of resource elements REs where schedulable CCEs fall into the interference region for each TTI.

Here, one CCE is constituted by 9 REGs (RE Group ), where one REG includes both 4 or 6 REs, and one CCE is constituted by 36 REs;

PCFICH, resource allocation of PHICH is in REG unit; a relatively large CCE is defined for resource allocation for a PDCCH having a relatively large data amount;

in LTE, the numbering and allocation of CCEs is continuous. If the number of remaining REGs after the system allocates the PCFICH and PHICH is NREG, the number of CCEs available for PDCCH is NCCE which is NREG/9 rounded down. The CCEs are numbered starting from 0 to NCCE-1.

Step S103: judging whether a zero interference candidate level exists or not under the initial polymerization degree;

the method comprises the following steps:

step S1031, preliminarily determining the degree of polymerization N of DCI scheduling according to the near-far point characteristic of the UE in the network, wherein the candidate level under the degree of polymerization N is K;

here, the aggregation level N represents the number of CCEs, and the candidate level K represents an optional CCE position in the corresponding aggregation level;

it should be noted here that, the aggregation of aggregation values is different according to the space of DCI mapping. There is a corresponding number of candidate levels at each degree of aggregation, as shown in FIG. 3.

Step S1032, selecting an available zero-interference candidate level m according to the polymerization degree N determined in the step S1031 and combining with Hist (CCE);

specifically, at all candidate levels K of the aggregation degree N, the statistical DCI falls into the RE number set RQ of the shared frequency bands, RQ ═ REnum (0), REnum (1), … REnum (K-1) }. According to statistics, the following steps are carried out:

step A1: and counting RENum (i) of 0 in RQ, wherein i is 0, … K-1, and forming a set TQ.

Here, the set TQ is referred to as a zero interference candidate level, which is used as an optimal candidate level for scheduling DCI;

step A2: the statistical zero interference candidate level TQ is classified as follows, specifically:

if the number of elements of the set TQ is greater than 1, it indicates that there are multiple selectable zero-interference candidate levels, and at this time, any one candidate level m can be selected for DCI scheduling;

of course, screening can be optimally carried out by taking into consideration the avoidance of other UE scheduling and the scheduling resource utilization rate maximization principle;

if the number of elements in the set TQ is equal to 1, the selectable zero-interference candidate level is only one, and the candidate level is selected for DCI scheduling;

if the number of elements in the set TQ is 0, no optional zero interference candidate level is indicated; step S104 is entered;

step S104: adjusting the polymerization degree N, and performing zero interference candidate level screening on all polymerization degree units with the polymerization degree smaller than N;

specifically, the aggregation of polymerization degrees smaller than the polymerization degree N is CQ, which is { C1, … Cj }. The polymerization degrees in the set are arranged in the order from large to small, that is, C1 is the maximum polymerization degree smaller than the polymerization degree N, and Cj is the minimum polymerization degree smaller than the polymerization degree N. Here, zero interference candidate level statistics is performed on each aggregation level in CQ, and a zero interference candidate level set TQ at each aggregation level is obtained as { TQ (C1), … TQ (cj) }, and according to the statistical result, the following steps are performed:

step B1: according to the sequence from C1 to Cj, finding the polymerization degree C (k) with the first statistical TQ (k) being equal to 0 in TQ (TQ) (C1), … TQ (Cj), and taking the polymerization degree W as the optimal modification polymerization degree;

here, when tq (k) is 0 and when it is described that the zero interference candidate level exists at the polymerization degree W, that is, at c (k), the processing is performed in accordance with step a2 in S1032 in step S103;

here, since the degree of polymerization W is smaller than the initial degree of polymerization N according to the principle of near-far points in the UE, power adjustment is required;

step B2: if there is no c (k) equal to 0 in the TQ, that is, there is no zero-interference candidate level, determining the candidate level with the smallest proportion of the degree of polymerization as the minimum-interference candidate level, and using the degree of polymerization corresponding to the minimum-interference candidate level as the optimal modified degree of polymerization W. The method comprises the following specific steps:

step B21, counting the candidate grade with the least number of corresponding REs under each polymerization degree, and calculating the proportion of the REs with the least number under each polymerization degree;

and step B22, determining the candidate grade with the smallest polymerization degree as the minimum interference candidate grade.

Step S105: and adjusting the DCI transmitting power according to the optimal change polymerization degree W and the minimum interfered RE proportion of the DCI.

Here, the power adjustment principle is: and (3) considering the relative performance relationship between the optimal change polymerization degree W and the initial polymerization degree N and the interfered degree, and increasing the DCI transmitting power under the optimal change polymerization degree W, thereby improving the demodulation performance of the DCI and ensuring the anti-interference capability of the DCI.

Certainly, the power adjustment principle of the present invention is not unique, and the DCI adaptive power adjustment may be performed by defining a power adjustment set in consideration of the UE changing the aggregation degree W, the interfered RE ratio, and the interference strength.

In the embodiment of the invention, the minimum interference candidate level is determined by adjusting the polymerization degree of the scheduling downlink control information and combining the counted number distribution of resource elements in the scheduling control channel elements in the shared frequency band, so that the scheduling and the emission power of the downlink control information in the PDCCH are adjusted, the interference of a different network to the LTE network, especially the interference to a physical downlink control channel PDCCH, when the LTE network and the different network are shared in a network frequency band is reduced, the performance of the PDCCH of the LTE in the frequency band shared network is stable, the downlink communication quality of the LTE in the shared frequency band is ensured, and the communication of the frequency band shared network is efficient and reliable.

Fourth embodiment

Fig. 5 is a schematic diagram illustrating a specific application of the PDCCH scheduling and power adjustment method of the band-shared network according to an embodiment of the present invention.

The embodiment is based on a GSM and LTE shared band network, and here, it is assumed that a downlink communication scenario is as follows: LTE is 20M system bandwidth; GSM is 2-channel voice, each channel occupies 200kHz frequency band, and frequency band resources are shared with LTE at 200kHz from the starting carrier positions of the left and right frequency bands of LTE, namely LTE carriers 1-14 and 1187-1200 (counting from 1 carrier index) are shared frequency bands. There is power control after GSM access, assuming that the power is 15dB higher per RE for GSM to LTE than for LTE.

In this embodiment, taking DCI2A scheduling of user UE1 as an example, the specific steps are as follows:

step C1: and screening the PCIs according to a shared frequency band model, and ensuring that the PCFICH and the PHICH channel avoid the carrier positions shared by the GSM and the LTE.

Specifically, the LTE cell identity PCI (value 0-503) is traversed, and the PCFICH and PHICH are obtained to map the available PCI completely avoiding the shared frequency band.

Here, the available PCIs are cell identifiers available for LTE networking in the shared frequency band, and under the screened PCIs, the two channels completely avoid interference influence, and the performance is lossless.

Step C2: and according to the current PCI, counting the distribution statistics Hist (CCE) of all CCEs falling into REs in the shared frequency band under the subframe, and scheduling and power adjustment of the shared frequency band are carried out on the DCI of the PDCCH.

Step C3: the user UE1 is scheduled for near-point-specific space DCI2A, where scheduling is performed by initially selecting CCE with aggregation level N ═ 4.

And calculating the index of the CCE (starting position control element) scheduled by the DCI2A to be 4 according to the UE identification, and the corresponding candidate level to be 2. Counting the number distribution Hist ═ 122211010031 of resource elements RE in CCE indexes 4-15 in the shared frequency band]. Counting a set of RE numbers RQ (N-4) { REnum (0) ═ 1+2+2 ═ 7, REnum (1) ═ 1+1+0+1 ═ 3} of the DCI falling into the shared band according to the initial degree of aggregation N-4, that is, a non-zero interference degree of aggregation candidate level with a degree of aggregation of 4

Therefore, there are no zero interference candidate levels.

Step C4: screening the optimal modified polymerization degree;

here, the polymerization degree set smaller than the initial polymerization degree N is CQ { C1 ═ 2, C2 ═ 1 }.

When the aggregation level is 2, counting a set of RE numbers RQ (N ═ 2) { REnum (0) ═ 1+2 ═ 3, REnum (1) ═ 2+2 ═ 4, REnum (2) ═ 1+1 ═ 2, REnum (3) ═ 0+1 ═ 1, REnum (4) ═ 0, REnum (5) ═ 3+1 ═ 4} of all candidate levels (6) DCI falling in the shared frequency band;

that is, the non-zero interference degree of polymerization candidate level TQ with a degree of polymerization of 2 (N-2) { m | RQ (N-2) (m) } 0} 4. The DCI2A is scheduled at a position where the aggregation degree is 2 and the candidate level m is 4.

Step C5: the transmit power of DCI2A is adjusted.

Since the optimum modification degree of polymerization W of 2 is smaller than the initial degree of polymerization N of 4, the transmission power of DCI2A needs to be adjusted here. Taking into account the difference in performance at different degrees of polymerization, the lifting α dB is used here.

According to the above process, DCI2A finally transmits with 2CCE at candidate level 4 with a power α dB higher than that of 4CCE scheduling.

Fifth embodiment

Fig. 6 is a schematic diagram illustrating a sixth specific application of the method for PDCCH scheduling and power adjustment in a band-shared network according to an embodiment of the present invention.

In this embodiment, taking DCI1A scheduling of user UE2 as an example, the specific steps are as follows:

step D1: and screening the PCIs according to a shared frequency band model, and ensuring that the PCFICH and the PHICH channel avoid the carrier positions shared by the GSM and the LTE.

Step D2: and according to the current PCI, counting the distribution statistics Hist (CCE) of all CCEs falling into REs in the shared frequency band under the subframe, and scheduling and power adjustment of the shared frequency band are carried out on the DCI of the PDCCH.

Step D3: user UE2 is scheduled for midpoint-specific DCI 1A. Here, N-4 CCEs are initially selected for scheduling.

The starting position for calculating the DCI1A scheduling according to the UE identification is 0, and the candidate levels are 2. Counting the highest ═ 121003120231 on CCE indexes 0-11]. Counting the number of REs of the DCI falling into the shared frequency band according to the initial aggregation degree N-4, where RQ (N-4) { REnum (0) ═ 1+2+1+0 ═ 4, REnum (1) ═ 3+1+2+0 ═ 6}, that is, the non-zero interference aggregation degree candidate level with aggregation degree 4

Therefore, there are no zero interference candidate levels.

Step D4: screening the optimal modified polymerization degree;

When the aggregation level is 2, counting a set of RE numbers RQ (N ═ 2) { REnum (0) ═ 1+2 ═ 3, REnum (1) ═ 1+0 ═ 1, REnum (2) ═ 0+3 ═ 3, REnum (3) ═ 1+2 ═ 3, REnum (4) ═ 0+2 ═ 2, REnum (5) ═ 3+1 ═ 4} of all candidate levels (6) DCI falling into the shared band; i.e. non-zero interfering DP candidate stage at a DP of 2

When the aggregation level is 1, counting a set of RE numbers RQ (N ═ 1) ═ 1, { REnum (0) ═ 1 ═ 2, { REnum (2) ═ 1, ("3"), (4) ═ 0, ("5) ═ 3}, where all candidate levels (6) DCI of the aggregation level fall into the shared frequency band; that is, in the non-zero interference degree of polymerization candidate level TQ with a degree of polymerization of 1 (N ═ 1) = { m | RQ (N ═ 1) (m ═ 0}, {3, 4 }.

Step D5: the transmit power of DCI1A is adjusted.

Since the optimal modification degree of polymerization W is 1 smaller than the initial degree of polymerization N is 4, the transmission power of DCI1A needs to be adjusted here. Taking into account the difference in performance at different degrees of polymerization, lifting β dB is used here.

According to the above process, DCI1A finally transmits with 1CCE at candidate level 3 at a power β dB higher than that of 4CCE scheduling.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for PDCCH scheduling and power adjustment of a band-shared network is characterized by comprising the following steps:

adjusting the polymerization degree of Downlink Control Information (DCI) to determine the minimum interference candidate level by combining with the Hist (CCE), and scheduling the DCI; the minimum interference candidate level is a candidate level with the number of REs falling into a shared frequency band of the DCI under the polymerization degree being zero or a candidate level with the minimum number of corresponding REs and the minimum occupied proportion under the respective polymerization degrees, the polymerization degree is the number of CCEs, and the candidate level is the position of a selectable CCE under the corresponding polymerization degree;

2. The method of claim 1, wherein the aggregation level is the number of CCEs, wherein one CCE corresponds to 36 REs, and each aggregation level corresponds to a certain number of candidate levels; the candidate level is the position of the CCE selectable under the corresponding polymerization degree.

3. The method according to claim 2, wherein the step of adjusting the aggregation level of the scheduling downlink control information DCI in combination with the hist (cce) to determine the minimum interference candidate level and scheduling the DCI comprises:

4. The method according to claim 3, wherein the step of adjusting the aggregation level of the scheduling downlink control information DCI and determining the zero interference candidate level in combination with the Hist (CCE), and scheduling the DCI comprises:

5. The method of claim 4, wherein the step of determining the number of zero interference candidate levels by counting the number of REs in each candidate level in combination with the Hist (CCE) and scheduling the DCI comprises:

6. The method of claim 5, wherein determining a minimum interference candidate level and scheduling the DCI when the zero interference candidate level is not present comprises:

7. An apparatus for PDCCH scheduling and power adjustment in a frequency band sharing network, applied to a first wireless communication network, comprising:

a determining module, configured to adjust a degree of polymerization of scheduling downlink control information DCI, determine a minimum interference candidate level in combination with the hist (cce), and schedule the DCI; the minimum interference candidate level is a candidate level with the number of REs falling into a shared frequency band of the DCI under the polymerization degree being zero or a candidate level with the minimum number of corresponding REs and the minimum occupied proportion under the respective polymerization degrees, the polymerization degree is the number of CCEs, and the candidate level is the position of a selectable CCE under the corresponding polymerization degree;

8. The apparatus of claim 7, wherein the aggregation level is a number of the CCEs, where one CCE corresponds to 36 REs, and each aggregation level corresponds to a certain number of candidate levels; the candidate level is the position of the CCE selectable under the corresponding polymerization degree.

9. The apparatus of PDCCH scheduling and power adjustment for a band-sharing network according to claim 8, wherein said determining module comprises:

10. The apparatus of claim 9, wherein the zero interference determination sub-module comprises:

11. The apparatus of claim 10, wherein the zero interference determination unit comprises:

12. The apparatus of PDCCH scheduling and power adjustment for a band-sharing network according to claim 11, wherein the minimum interference determination sub-module comprises:

13. A network side device, characterized in that it comprises means for PDCCH scheduling and power adjustment of a band sharing network according to any of claims 7-12.