CN104125613A

CN104125613A - Cell reselection method, system and equipment thereof

Info

Publication number: CN104125613A
Application number: CN201310155636.9A
Authority: CN
Inventors: 白文岭; 李媛媛; 蒋成钢; 杨宇; 胡金玲
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-04-28
Filing date: 2013-04-28
Publication date: 2014-10-29
Anticipated expiration: 2033-04-28
Also published as: CN104125613B; WO2014177037A1

Abstract

An embodiment of the invention relates to the wireless communication technology field and especially relates to a cell reselection method, a system and equipment thereof. In the prior art, when a cell reselection process is applied in a CR system, user equipment cell reselection delay during CR system frequency spectrum switching is obviously increased and power cost of the cell reselection is increased too. By using the method, the system and the equipment of the invention, the above problems are solved. The method comprises the following steps that user equipment receives standby frequency point information from network side equipment, wherein the standby frequency point information comprises at least one standby frequency point, after the cell reselection is needed to be performed, according to a standby frequency point in the standby frequency point information, a target cell is determined; according to the determined target cell, the cell reselection is performed. The network side equipment notifies the standby frequency point information of the cell reselection during frequency spectrum switching the user equipment so that the user equipment carries out the cell reselection according to the standby frequency point information. Cell reselection delay and power cost of the cell reselection of idle state user equipment during the frequency spectrum switching are reduced.

Description

A kind of method, system and equipment of cell reselection

Technical field

The present invention relates to wireless communication technology field, particularly a kind of method of cell reselection, system and equipment.

Background technology

Radio communication frequency spectrum is a kind of natural resources of preciousness, along with the very fast development of wireless communication technology, the poor problem of frequency spectrum resource is day by day serious, in order to alleviate the present situation of frequency spectrum resource anxiety, relevant department and agency is monitored and is studied wireless communication spectrum, find that some frequency range (as TV band) is not used or do not use in most of time in most of regions, there is the situation that multisystem multi-user competes simultaneously in some frequency range, i.e. the use of frequency spectrum resource exists unbalanced phenomenon.CR(Cognitive Radio, cognitive radio) concept under this background, produce just, its basic thought is: authoring system is not being caused under the prerequisite of interference, cognitive radio system can carry out dynamic chance formula and access white spaces to communicate by the variation of monitoring current wireless environment.

In the time of the blank frequency spectrum of cognitive radio system chance formula insertion authority system, prerequisite is the harmful interference that protection authoring system business is not subject to CR system, and this just requires:

1, cognitive radio system is accurately judged the ability of the blank frequency spectrum of authoring system frequency range;

2, frequency spectrum switches, be that CR system discovery authoring system reappears on the blank frequency spectrum (source working frequency points) of current use, CR system exits the blank frequency spectrum of current use in time, and whole CR system is switched to the process of other the upper recovery business of blank frequency spectrum (target working frequency points).

In traditional wireless communication system, Idle state subscriber equipment is after community is selected, need to monitor at any time the signal quality of Serving cell and/or adjacent cell, and priority is higher or the better community of channel quality is resident to select one according to signal quality, this process is exactly cell reselection.The cell reselection process of traditional wireless communication system mainly comprises: subscriber equipment is measured the signal quality of Serving cell, and combine and determine whether measure neighbor cells according to conditions such as priority parameters, and safeguard re-selecting cell list according to the signal quality information of the adjacent cell of measuring; Subscriber equipment is according to the signal quality information of Serving cell and adjacent cell, or subscriber equipment determines that by system information the conditions such as whether community is prohibited determine whether triggering cell gravity treatment, and carries out concrete cell reselection process according to re-selecting cell list.

With LTE(Long Term Evolution, Long Term Evolution) system is example: LTE system, in cell reselection, introduce the concept of priority, network side, by the priority of different frequent points is set, can reaches and control the resident object of subscriber equipment.Cell reselection process is mainly the process of being controlled subscriber equipment co-frequency cell, the measurement of different priorities alien-frequency district and gravity treatment by base station.

For the wireless communication system that adopts CR technology, in frequency spectrum handoff procedure, recover behind community the quality degradation of Serving cell in the working frequency points of source when the source of release working frequency points Shang community, base station in community and at frequency for subsequent use.If according to current cell reselection process, for the subscriber equipment that is positioned at center of housing estate, on the one hand, the signal quality of neighbor cell bad on geographical position, cannot gravity treatment to suitable neighbor cell; On the other hand, owing to there is no before the relevant information of community on frequency for subsequent use, cause user that it must to carry out the selection course ability gravity treatment of Hen Chang consuming time community to the community of frequency for subsequent use.

In sum, when current cell reselection process is applied to CR system, the subscriber equipment cell reselection obviously having increased when CR system spectrum is switched postpones, and has increased the power overhead of cell reselection.

Summary of the invention

The invention provides a kind of method, system and equipment of cell reselection, while being applied to CR system in order to solve the cell reselection process existing in prior art, the subscriber equipment cell reselection obviously having increased when CR system spectrum is switched postpones, and has increased the power overhead problem of cell reselection.

The method of a kind of cell reselection that the embodiment of the present invention provides, comprising:

Subscriber equipment receives the frequency point information for subsequent use from network equipment, and wherein said frequency point information for subsequent use comprises at least one frequency for subsequent use;

Described subscriber equipment need to carry out, after cell reselection, according to the frequency for subsequent use in described frequency point information for subsequent use, determining Target cell definite;

Described subscriber equipment carries out cell reselection according to the described Target cell of determining.

The method of the another kind of cell reselection that the embodiment of the present invention provides, comprising:

Network equipment is determined frequency point information for subsequent use, and wherein said frequency point information for subsequent use comprises at least one frequency for subsequent use;

Described network equipment sends frequency point information for subsequent use to described subscriber equipment, so that described subscriber equipment need to carry out after cell reselection definite, according to the frequency for subsequent use in described frequency point information for subsequent use, determine Target cell, and carry out cell reselection according to the described Target cell of determining.

The subscriber equipment of a kind of cell reselection that the embodiment of the present invention provides, comprising:

Receiver module, for receiving the frequency point information for subsequent use from network equipment, wherein said frequency point information for subsequent use comprises at least one frequency for subsequent use;

Target cell determination module, for carrying out, after cell reselection, according to the frequency for subsequent use in described frequency point information for subsequent use, determining Target cell definite;

Gravity treatment module, for carrying out cell reselection according to the described Target cell of determining.

The network equipment of a kind of cell reselection that the embodiment of the present invention provides, comprising:

Frequency point information determination module, for determining frequency point information for subsequent use, wherein said frequency point information for subsequent use comprises at least one frequency for subsequent use;

Sending module, for sending frequency point information for subsequent use to described subscriber equipment, so that described subscriber equipment need to carry out after cell reselection determining, according to the frequency for subsequent use in described frequency point information for subsequent use, determine Target cell, and carry out cell reselection according to the described Target cell of determining.

The system of a kind of cell reselection that the embodiment of the present invention provides, comprising:

Subscriber equipment, for receiving the frequency point information for subsequent use from network equipment, wherein said frequency point information for subsequent use comprises at least one frequency for subsequent use; Need to carry out, after cell reselection, according to the frequency for subsequent use in described frequency point information for subsequent use, determining Target cell definite; Carry out cell reselection according to the described Target cell of determining;

Network equipment, for determining frequency point information for subsequent use, sends frequency point information for subsequent use to described subscriber equipment.

Due to network equipment by carry out frequency spectrum switch time cell reselection frequency point information notifying user equipment for subsequent use, so that described subscriber equipment carries out cell reselection according to described frequency point information for subsequent use, thereby the cell reselection delay of Idle state subscriber equipment when frequency spectrum switches and the power overhead of cell reselection are reduced.

Brief description of the drawings

Fig. 1 is the system configuration schematic diagram of embodiment of the present invention cell reselection;

Fig. 2 is the structural representation of subscriber equipment in the system of embodiment of the present invention cell reselection;

Fig. 3 is the structural representation of network equipment in the system of embodiment of the present invention cell reselection;

Fig. 4 is the method flow schematic diagram that embodiment of the present invention subscriber equipment carries out cell reselection;

Fig. 5 is the method flow schematic diagram of embodiment of the present invention network equipment notifying user equipment frequency point information for subsequent use;

Fig. 6 is the realization flow figure that in embodiment of the present invention cognitive radio system, network equipment frequency spectrum switches;

Fig. 7 is the realization flow figure of subscriber equipment cell reselection in embodiment of the present invention cognitive radio system.

Embodiment

Embodiment of the present invention subscriber equipment need to carry out after cell reselection definite, according to the frequency for subsequent use in the frequency point information for subsequent use of network equipment notice, determines Target cell.Due to network equipment by carry out frequency spectrum switch time cell reselection frequency point information notifying user equipment for subsequent use, so that subscriber equipment carries out cell reselection according to frequency point information for subsequent use, thereby the cell reselection delay of Idle state subscriber equipment when frequency spectrum switches and the power overhead of cell reselection are reduced.

Wherein, the embodiment of the present invention is applicable to adopt LTE system, the TD-SCDMA(Time Division Synchronized Code Division Multiple Access of CR technology, time-division synchronization CDMA; CDMA, Code Division Multiple Access; Code division multiple access) system, GSM(Global System for Mobile Communications, global system for mobile communications), WCDMA(Wide-band Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA) access), CDMA-2000 and WRAN(Wireless Regional Area Network, radio area network) etc. wireless communication system.

The subscriber equipment of the embodiment of the present invention is in the idle(free time) subscriber equipment of state.

In declarative procedure below, first implement to describe from the cooperation of network side and user equipment side, finally describe from the enforcement of network side and user equipment side respectively, but this does not also mean that the two must coordinate enforcement, in fact, separate while implementing when network side and user equipment side, also solved respectively in network side, the existing problem of user equipment side, when just the two is combined with, can obtain better technique effect.

As shown in Figure 1, the system of embodiment of the present invention cell reselection comprises: subscriber equipment 10 and network equipment 20.

Subscriber equipment 10, for receiving the frequency point information for subsequent use from network equipment, wherein frequency point information for subsequent use comprises at least one frequency for subsequent use; Need to carry out, after cell reselection, according to the frequency for subsequent use in frequency point information for subsequent use, determining Target cell definite; Carry out cell reselection according to definite Target cell;

Network equipment 20, for determining frequency point information for subsequent use; Subscriber equipment sends frequency point information for subsequent use to subscriber equipment, so that need to carry out, after cell reselection, according to the frequency for subsequent use in frequency point information for subsequent use, determining Target cell, and carrying out cell reselection according to definite Target cell definite.

In force, network equipment need to carry out, after frequency spectrum switching, according to the frequency for subsequent use in frequency point information for subsequent use, determining Target cell, and carrying out frequency spectrum switching according to definite Target cell definite.

Wherein, the network equipment of the embodiment of the present invention is safeguarded frequency point information for subsequent use, prenotices the subscriber equipment frequency point information for subsequent use in community by broadcast mode.

Accordingly, subscriber equipment receives the frequency point information for subsequent use from network equipment by broadcast mode.

Network equipment is safeguarded frequency point information for subsequent use by modes such as access data storehouse, perception in the time of work.

Concrete, database mode is: network equipment is obtained and authorized the use state of frequency or directly obtain the unappropriated frequency of authoring system by access data storehouse, and selects one or more frequency as frequency for subsequent use from the unappropriated frequency of authoring system;

Perceptive mode is: network equipment is determined the use state of authorizing frequency by frequency spectrum perception, and selects one or more frequency as frequency for subsequent use from the unappropriated frequency of authoring system.

In the time there is multiple frequency for subsequent use in frequency point information for subsequent use, network equipment can random alignment or according to priority arrangement frequency for subsequent use, the priority of frequency for subsequent use is higher, and frequency sequence for subsequent use is more forward, and the frequency for subsequent use after arranging is encapsulated in frequency point information for subsequent use and is notified to subscriber equipment.

Network equipment determines that the mode of the priority of frequency for subsequent use has a lot, and such as the available degree according to frequency for subsequent use is determined its priority, the available degree of frequency for subsequent use is higher, and its priority is also higher.

Preferably, frequency point information for subsequent use also further can comprise:

Frequency Shang community ID(mark for subsequent use), be used to indicate subscriber equipment according to frequency for subsequent use and cell ID corresponding to frequency for subsequent use, determine the community of frequency for subsequent use.

In force, the cell ID on frequency for subsequent use also can not send by frequency point information for subsequent use, but sends separately, as long as guarantee subscriber equipment can be determined the cell ID that frequency for subsequent use is corresponding.

The message format of frequency point information for subsequent use is as shown in the table:

Frequency point information message format for subsequent use in table 1. technical solution of the present invention

Certainly, frequency point information for subsequent use also can not be included in the cell ID on certain frequency for subsequent use, and at this moment network equipment and subscriber equipment can be by the static agreements of agreement.Such as, in the time that frequency point information for subsequent use is not included in the cell ID on certain frequency for subsequent use, the cell ID on this frequency for subsequent use is cell-of-origin mark.Also when can approximately settled frequency point information for subsequent use not being included in the cell ID on certain frequency for subsequent use, the Dou Shi alternative cell, all communities on this frequency for subsequent use.

Network equipment can pass through broadcast periodic broadcasting frequency point information for subsequent use; Also can send frequency point information for subsequent use to subscriber equipment by dedicated signaling is point-to-point.

In the time that frequency point information for subsequent use has renewal, the frequency point information for subsequent use that network equipment can upgrade by broadcast notifying user equipment; Also can send the frequency point information for subsequent use after upgrading to subscriber equipment by dedicated signaling is point-to-point.

Such as, in LTE system, base station can adopt SIB(System Information Block, system information block) 2 or newly define SIB and carry frequency point information for subsequent use.

Particularly, for LTE system, the message format that carries frequency point information for subsequent use in the SIB2 of frequency point information for subsequent use is as follows, and wherein backupFreqList is frequency point information for subsequent use:

backupFreqList?BackupFreqList?OPTIONAL,--Need?ON

Network equipment need to be carried out after frequency spectrum switching in decision-making, leaves source working frequency points, and recovers community at frequency for subsequent use.

Wherein, network equipment finds that by modes such as access data storehouse or perception authorized user reappears in current working frequency, or when network equipment finds that current working frequency channel quality drops to a certain degree (such as lower than setting threshold value), network equipment decision-making need to be carried out frequency spectrum switching.

The frequency for subsequent use (center frequency point of Target cell) that network equipment selects a frequency for subsequent use to switch as frequency spectrum from the frequency point information for subsequent use of its maintenance, leaves source working frequency points, and recovers community at frequency for subsequent use.The mode of base station selected frequency for subsequent use has a lot, such as random selection, selects in order etc.

Alternatively, network equipment need to carry out after frequency spectrum switching definite, the subscriber equipment cell-of-origin forbidding in notification source community, and the subscriber equipment in triggering cell starts to carry out cell reselection process.Forbidding community refers to that this community forbids that Idle state subscriber equipment is resident.

If comprise community disable command in the existing broadcast of CR system, CR system adopts existing broadcast carrying community disable command, otherwise CR system can newly define broadcast carrying community disable command or new definition information field carrying community disable command in existing broadcast.

For example, in LTE system, can adopt forbidding (cellBarred) territory, SIB1 carrying community, following form:

cellBarred?ENUMERATED{barred,notBarred}

When network equipment is carried out frequency spectrum switching in decision-making, forbidding territory, SIB1 Zhong community is set to forbidding (barred), and this community of the subscriber equipment in notifying cell has been forbidding community, and the subscriber equipment in triggering cell starts to carry out cell reselection process.

For the subscriber equipment of the embodiment of the present invention, subscriber equipment, after definite cell-of-origin signal measurements is lower than the first measurement threshold value or after detecting that cell-of-origin is forbidden, is determined and need to be carried out cell reselection.

In force, subscriber equipment detects in broadcast whether comprise community disable command: if community disable command detected in broadcast, determine cell-of-origin forbidding.

Wherein, subscriber equipment need to carry out after cell reselection definite, and according to the frequency for subsequent use in frequency point information for subsequent use, while determining Target cell, according to whether determining the cell ID on frequency for subsequent use, corresponding different processing modes, is introduced respectively below.

Mode one, subscriber equipment be can not determine the cell ID on frequency for subsequent use.

Subscriber equipment selects Yi Ge community as Target cell in all communities from part or all of frequency for subsequent use.

In force, signal measurements corresponding to part or all of community on subscriber equipment determining section or whole frequency for subsequent use, from be greater than the signal measurements of the second measurement threshold value, select a signal measurements, and using the community corresponding signal measurements of selecting as Target cell.

Such as selecting maximum signal measurements from be greater than the signal measurements of the second measurement threshold value.

Preferably, subscriber equipment can first judge the distance between subscriber equipment and network equipment, if the distance between subscriber equipment and network equipment is less than distance threshold value, subscriber equipment is using the community corresponding signal measurements of selecting as Target cell.Concrete deterministic process can be before subscriber equipment be determined signal measurements corresponding to community, afterwards or the signal measurements corresponding with definite community carry out simultaneously.Or

Subscriber equipment can first judge in part or all of other the available frequencies the frequency comprising except frequency point information for subsequent use whether do not meet the frequency that cell reselection requires, if so, and using the community corresponding signal measurements of selecting as Target cell; Otherwise selection meets the frequency of cell reselection requirement.Concrete deterministic process can be before subscriber equipment be determined signal measurements corresponding to community, afterwards or the signal measurements corresponding with definite community carry out simultaneously.

Preferably, when subscriber equipment first judges the distance between subscriber equipment and network equipment, if the distance between subscriber equipment and network equipment is not less than distance threshold value, subscriber equipment can judge in part or all of other the available frequencies the frequency comprising except frequency point information for subsequent use whether do not meet the frequency that cell reselection requires again, if so, using the community corresponding signal measurements of selecting as Target cell; Otherwise selection meets the frequency of cell reselection requirement.Concrete deterministic process can be before subscriber equipment be determined signal measurements corresponding to community, afterwards or the signal measurements corresponding with definite community carry out simultaneously

Certainly, subscriber equipment also can not judge in distance between subscriber equipment and network equipment or judgement part or all of other available frequencies except the frequency that frequency point information for subsequent use comprises whether do not meet the frequency that cell reselection requires, but directly using the community corresponding signal measurements of selection as Target cell.

Preferably, subscriber equipment can first judge in part or all of other the available frequencies the frequency comprising except frequency point information for subsequent use whether do not meet the frequency that cell reselection requires, and if so, subscriber equipment is determined the signal measurements that community is corresponding; Otherwise subscriber equipment does not need to determine signal measurements corresponding to community, but directly select to meet the frequency of cell reselection requirement.

Preferably, other available frequencies of above-mentioned part are frequency priority corresponding to frequency that corresponding frequency priority is not less than place, cell-of-origin.

The mode of determining the priority of frequency for subsequent use has a lot, and such as the available degree according to frequency for subsequent use is determined its priority, the available degree of frequency for subsequent use is higher, and its priority is also higher.

In force, subscriber equipment is in the time determining signal measurements corresponding to community, can determine in order signal measurements corresponding to frequency Shang for subsequent use community, and be greater than after the second measurement threshold value a signal measurements corresponding to frequency Shang You for subsequent use community, stop determining signal measurements corresponding to other communities.That is to say, subscriber equipment can be determined all frequencies for subsequent use, and all communities on a frequency for subsequent use, only need determine that on a frequency for subsequent use, signal measurements corresponding to Yi Ge community is greater than after the second measurement threshold value, just can determine that this community is Target cell, then stop at signal measurements corresponding to definite other communities on this frequency for subsequent use, and stop determining other signal measurements corresponding to frequency Shang for subsequent use community.

Above-mentioned " particular content that cell reselection requires " for other frequencies can, referring to the cell reselection requirement specifying in 3GPP TS36.304 agreement, not repeat them here.

For mode one, subscriber equipment cannot unique definite cell reselection when cell ID on frequency for subsequent use, the center frequency point set that only can determine Target cell is the frequency point sets for subsequent use of cell reselection, and now the concrete executive mode of cell reselection can be taked the one in following mode:

1, subscriber equipment starts to measure the frequency for subsequent use in frequency point sets for subsequent use, in the time existing the signal measurements of the best community of signal measurements on certain frequency for subsequent use to be greater than the second default threshold value in frequency point sets for subsequent use, subscriber equipment gravity treatment is to the best community of signal measurements on frequency for subsequent use.If when in frequency point sets for subsequent use, on all frequencies for subsequent use, the signal measurements of the best community of signal measurements is all less than or equal to the second default threshold value, subscriber equipment determines that the best community of the signal measurements on frequency for subsequent use is Target cell, lays equal stress on and chooses Target cell.

2, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, subscriber equipment starts to measure the frequency for subsequent use in frequency point sets for subsequent use, when the signal measurements that has the best community of signal measurements on certain frequency for subsequent use in frequency point sets for subsequent use is greater than the second default threshold value, and there is no high priority frequency and when a community for All factors being equal, preference will be give to level frequency (with the frequency comparison of cell-of-origin) meets gravity treatment and requires, subscriber equipment determines that the best community of the signal measurements on frequency for subsequent use is Target cell, lay equal stress on and choose Target cell.

3, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, and there is no high priority frequency and when the community of All factors being equal, preference will be give to level frequency meets gravity treatment and requires, subscriber equipment starts to measure the frequency for subsequent use in frequency point sets for subsequent use, in the time existing the signal measurements of the best community of signal measurements on certain frequency for subsequent use to be greater than the second default threshold value in frequency point sets for subsequent use, subscriber equipment determines that the best community of the signal measurements on frequency for subsequent use is Target cell, lays equal stress on and chooses Target cell.

4, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, subscriber equipment starts to measure the frequency for subsequent use in frequency point sets for subsequent use, when the signal measurements that has the best community of signal measurements on certain frequency for subsequent use in frequency point sets for subsequent use is greater than the second default threshold value, and there is no high priority frequency, when the community of equal frequency and low priority frequency (with the frequency comparison of cell-of-origin) meets gravity treatment and requires, subscriber equipment determines that the best community of the signal measurements on frequency for subsequent use is Target cell, lay equal stress on and choose Target cell.

5, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, and there is no high priority frequency, when the community of equal frequency and low priority frequency (with the frequency comparison of cell-of-origin) meets gravity treatment and requires, subscriber equipment starts to measure the frequency for subsequent use in frequency point sets for subsequent use, in the time existing the signal measurements of the best community of signal measurements on certain frequency for subsequent use to be greater than the second default threshold value in frequency point sets for subsequent use, subscriber equipment determines that the best community of the signal measurements on frequency for subsequent use is Target cell, lay equal stress on and choose Target cell.

In which, subscriber equipment can the order in frequency point sets for subsequent use be carried out and measure for the frequency for subsequent use in frequency point sets for subsequent use successively according to frequency for subsequent use, also can carry out and measure for the frequency for subsequent use in frequency point sets for subsequent use according to random sequence, until suitable Target cell is arrived in subscriber equipment gravity treatment, or subscriber equipment has traveled through the frequency all for subsequent use in frequency point sets for subsequent use.

In which, subscriber equipment can be measured for frequency point sets for subsequent use in the first setting duration of measuring after opening, and also can measure frequency point sets for subsequent use N1 time, and N1 is positive integer.

Mode two, subscriber equipment can be determined the cell ID on frequency for subsequent use.

Subscriber equipment is using the cell ID of cell-of-origin as cell ID corresponding to each frequency for subsequent use, or reception is from cell ID corresponding to the each frequency for subsequent use of network equipment;

Subscriber equipment, according to the frequency for subsequent use in frequency point information for subsequent use and cell ID corresponding to frequency for subsequent use, is determined each frequency Shang for subsequent use community, and selects Yi Ge community as Target cell from all communities of determining.

In force, signal measurements corresponding to subscriber equipment determining section or whole frequency Shang for subsequent use community, from be greater than the signal measurements of the second measurement threshold value, select a signal measurements, and using the community corresponding signal measurements of selecting as Target cell.

In force, subscriber equipment is in the time determining signal measurements corresponding to community, can determine in order signal measurements corresponding to frequency Shang for subsequent use community, and be greater than after the second measurement threshold value a signal measurements corresponding to frequency Shang You for subsequent use community, stop determining signal measurements corresponding to other communities.That is to say, subscriber equipment can be determined all frequency Shang for subsequent use community, only need determine that on a frequency for subsequent use, signal measurements corresponding to Yi Ge community is greater than after the second measurement threshold value, just can determine that this community is Target cell, then stop at signal measurements corresponding to definite other communities on this frequency for subsequent use, and stop determining other signal measurements corresponding to frequency Shang for subsequent use community.

For mode two, subscriber equipment, can unique definite cell reselection when cell ID on frequency for subsequent use, the cell ID on can frequency for subsequent use be determined set of cells for subsequent use, and determines Target cell according to set of cells for subsequent use.Now the concrete executive mode of cell reselection can be taked the one in following mode:

1, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, subscriber equipment starts to measure the Target cell in set of cells for subsequent use, in the time existing the signal measurements of certain community for subsequent use to be greater than the second default threshold value in set of cells for subsequent use, subscriber equipment determines that this is for subsequent use for Target cell, lays equal stress on and chooses Target cell.If when in set of cells for subsequent use, the signal measurements of all Target cells is all less than or equal to the second default threshold value, subscriber equipment is carried out traditional cell reselection process.

2, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, subscriber equipment starts to measure the Target cell in set of cells for subsequent use, when existing the signal measurements of certain Target cell to be greater than the second default threshold value in set of cells for subsequent use, and there is no high priority frequency and when a community for All factors being equal, preference will be give to level frequency (with the frequency comparison of cell-of-origin) meets gravity treatment and requires, subscriber equipment determines that this is for subsequent use for Target cell, lays equal stress on and chooses Target cell.

3, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, and there is no high priority frequency and when the community of All factors being equal, preference will be give to level frequency meets gravity treatment and requires, subscriber equipment starts to measure the Target cell in set of cells for subsequent use, in the time existing the signal measurements of certain Target cell to be greater than the second default threshold value in set of cells for subsequent use, subscriber equipment determines that this is for subsequent use for Target cell, lays equal stress on and chooses Target cell.

4, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, subscriber equipment starts to measure the Target cell in set of cells for subsequent use, when existing the signal measurements of certain Target cell to be greater than the second default threshold value in set of cells for subsequent use, and when the community that there is no high priority frequency, equal frequency and low priority frequency (with the frequency comparison of cell-of-origin) meets gravity treatment and requires, subscriber equipment determines that this is for subsequent use for Target cell, lays equal stress on and chooses Target cell.

5, subscriber equipment is measured the signal measurements of cell-of-origin, when the signal measurements of cell-of-origin is during lower than default the first threshold value, and when the community that there is no high priority frequency, equal frequency and low priority frequency (with the frequency comparison of cell-of-origin) meets gravity treatment and requires, subscriber equipment starts to measure the Target cell in set of cells for subsequent use, in the time existing the signal measurements of certain community for subsequent use to be greater than the second default threshold value in set of cells for subsequent use, subscriber equipment determines that this is for subsequent use for Target cell, lays equal stress on and chooses Target cell.

In which, subscriber equipment can the order in set of cells for subsequent use be carried out and measure for the Target cell in set of cells for subsequent use successively according to Target cell, also can carry out measuring process for the Target cell in set of cells for subsequent use according to random sequence, until suitable Target cell is arrived in subscriber equipment gravity treatment, or subscriber equipment has traveled through all Target cells in set of cells for subsequent use.

Preferably, above-mentioned threshold value can specify in agreement; Also can be set by network equipment, broadcast in Bing community, subscriber equipment obtains default thresholding by reading broadcast; Also can be set voluntarily by subscriber equipment.

Wherein, the signal measurements of the embodiment of the present invention can be at least one in following measured value:

RSRP(Reference signal received power, Reference Signal Received Power) value, RSRQ(Reference Signal Received Quality, Reference Signal Received Quality) value, according to the definite measured value of RSRP value and the measured value definite according to RSRQ value (below two value can referring to 3GPP TS36.304 agreement), and other can reflect the parameter value of cell signal quality.

If signal measurements is multiple in above-mentioned measured value, with threshold value relatively time, different measured values compares with corresponding threshold value.Such as signal measurements is RSRP value and RSRQ value, in the time comparing with the first measurement threshold value, the RSRP value first measurement threshold value corresponding with RSRP value compares, and the RSRQ value first measurement threshold value corresponding with RSRQ value compares.

If the signal measurements on frequency for subsequent use or community is multiple in above-mentioned measured value, if all measured values are all greater than after threshold value, determine that signal measurements is greater than threshold value; If there is part to be greater than threshold value in all measured values, and be greater than the quantity of threshold value more than the quantity that is less than threshold value, determine that signal measurements is greater than threshold value, have as long as can also have in all measured values the threshold value of being greater than, determine that signal measurements is greater than threshold value.

If the signal measurements on frequency for subsequent use or community is multiple in above-mentioned measured value, can select a signal measurements (the signal measurements priority of selecting is the highest), now only the signal measurements of selection and threshold value need to be compared.Priority can be by the static regulation of agreement, or network equipment notifies the priority of selection to subscriber equipment, or subscriber equipment is decided in its sole discretion.

If the signal measurements on cell-of-origin is multiple in above-mentioned measured value, if all measured values all lower than after threshold value, determine that signal measurements is lower than threshold value; If or have part in all measured values lower than threshold value, and lower than the quantity of the signal measurements of threshold value more than the quantity of signal measurements that is not less than threshold value, determine that signal measurements is lower than threshold value, have lower than threshold value as long as can also have in all measured values, determine that signal measurements is lower than threshold value.

If the signal measurements on cell-of-origin is multiple in above-mentioned measured value, can select a signal measurements (the signal measurements priority of selecting is the highest), now only the signal measurements of selection and threshold value need to be compared.Priority can be by the static regulation of agreement, or network equipment notifies the priority of selection to subscriber equipment, or subscriber equipment is decided in its sole discretion.

The network equipment of the embodiment of the present invention can be base station (such as macro base station, Home eNodeB etc.), can be also RN(relaying) equipment can also be other network equipment.

As shown in Figure 2, the subscriber equipment in the system of embodiment of the present invention cell reselection comprises: receiver module 200, Target cell determination module 210 and gravity treatment module 220.

Receiver module 200, for receiving the frequency point information for subsequent use from network equipment, wherein frequency point information for subsequent use comprises at least one frequency for subsequent use;

Target cell determination module 210, for carrying out, after cell reselection, according to the frequency for subsequent use in frequency point information for subsequent use, determining Target cell definite;

Gravity treatment module 220, for carrying out cell reselection according to definite Target cell.

Preferably, receiver module 200 specifically for:

Receive the frequency point information for subsequent use from network equipment by broadcast mode.

Preferably, Target cell determination module 210 specifically for:

After definite cell-of-origin signal measurements is lower than the first measurement threshold value or after detecting that cell-of-origin is forbidden, determines and need to carry out cell reselection.

Preferably, Target cell determination module 210 specifically for:

In all communities from part or all of frequency for subsequent use, select Yi Ge community as Target cell.

Preferably, Target cell determination module 210 specifically for:

Signal measurements corresponding to part or all of community on determining section or whole frequency for subsequent use selected a signal measurements from be greater than the signal measurements of the second measurement threshold value, and using the community corresponding signal measurements of selecting as Target cell.

Preferably, Target cell determination module 210 specifically for:

Using the cell ID of cell-of-origin as cell ID corresponding to each frequency for subsequent use, or receive from cell ID corresponding to the each frequency for subsequent use of network equipment; According to the frequency for subsequent use in frequency point information for subsequent use and cell ID corresponding to frequency for subsequent use, determine each frequency Shang for subsequent use community, and select Yi Ge community as Target cell from all communities of determining.

Preferably, Target cell determination module 210 specifically for:

Signal measurements corresponding to determining section or whole frequency Shang for subsequent use community selected a signal measurements from be greater than the signal measurements of the second measurement threshold value, and using the community corresponding signal measurements of selecting as Target cell.

Preferably, Target cell determination module 210 specifically for:

Order is determined signal measurements corresponding to frequency Shang for subsequent use community, and is greater than after the second measurement threshold value a signal measurements corresponding to frequency Shang You for subsequent use community, stops determining signal measurements corresponding to other communities.

Preferably, Target cell determination module 210 also for:

Determine that the distance between subscriber equipment and network equipment is less than distance threshold value; Or after determining and not meeting the frequency that cell reselection requires in part or all of other available frequencies except the frequency that frequency point information for subsequent use comprises, using the community corresponding signal measurements of selection as Target cell

Preferably, Target cell determination module 210 also for:

After determining and not meeting the frequency that cell reselection requires in part or all of other available frequencies except the frequency that frequency point information for subsequent use comprises, determine the signal measurements that community is corresponding.

Preferably, other available frequencies of part are frequency priority corresponding to frequency that corresponding frequency priority is not less than place, cell-of-origin.

As shown in Figure 3, the network equipment in the system of embodiment of the present invention cell reselection comprises: frequency point information determination module 300 and sending module 310.

Frequency point information determination module 300, for determining frequency point information for subsequent use, wherein frequency point information for subsequent use comprises at least one frequency for subsequent use;

Sending module 310, for send frequency point information for subsequent use to subscriber equipment, so that subscriber equipment need to carry out, after cell reselection, according to the frequency for subsequent use in frequency point information for subsequent use, determining Target cell, and carrying out cell reselection according to definite Target cell definite.

Preferably, in frequency point information for subsequent use, also comprise the Target Cell Identifier on frequency for subsequent use.

Preferably, sending module 300 specifically for:

Send frequency point information for subsequent use by broadcast to subscriber equipment.

Preferably, sending module 300 specifically for:

After the frequency point information notifying user equipment for subsequent use of determining, need to carry out after frequency spectrum switching the subscriber equipment cell-of-origin forbidding in notification source community definite.

Preferably, frequency point information determination module 300 need to carry out, after frequency spectrum switching, according to the frequency for subsequent use in frequency point information for subsequent use, determining Target cell, and carrying out frequency spectrum switching according to definite Target cell definite.

Based on same inventive concept, a kind of method that subscriber equipment carries out cell reselection and the method for network equipment notifying user equipment frequency point information for subsequent use are also provided in the embodiment of the present invention, because the principle that these methods are dealt with problems is similar to the system of embodiment of the present invention cell reselection, therefore the enforcement of these methods can be referring to the enforcement of system, repeats part and repeat no more.

As shown in Figure 4, the method that embodiment of the present invention subscriber equipment carries out cell reselection comprises the following steps:

Step 401, subscriber equipment receive the frequency point information for subsequent use from network equipment, and wherein frequency point information for subsequent use comprises at least one frequency for subsequent use;

Step 402, subscriber equipment need to carry out, after cell reselection, according to the frequency for subsequent use in frequency point information for subsequent use, determining Target cell definite;

Step 403, subscriber equipment carry out cell reselection according to definite Target cell.

Preferably, subscriber equipment receives the frequency point information for subsequent use from network equipment by broadcast mode.

Preferably, subscriber equipment, after definite cell-of-origin signal measurements is lower than the first measurement threshold value or after detecting that cell-of-origin is forbidden, is determined and need to be carried out cell reselection.

As shown in Figure 5, the method for embodiment of the present invention network equipment notifying user equipment frequency point information for subsequent use comprises:

Step 501, network equipment are determined frequency point information for subsequent use, and wherein frequency point information for subsequent use comprises at least one frequency for subsequent use;

Step 502, network equipment send frequency point information for subsequent use to subscriber equipment, so that subscriber equipment need to carry out, after cell reselection, according to the frequency for subsequent use in frequency point information for subsequent use, determining Target cell, and carrying out cell reselection according to definite Target cell definite.

Preferably, network equipment, by the frequency point information notifying user equipment for subsequent use of determining, comprising:

Network equipment sends frequency point information for subsequent use by broadcast to subscriber equipment.

Preferably, network equipment, by after the frequency point information notifying user equipment for subsequent use of determining, also comprises:

Network equipment need to carry out after frequency spectrum switching definite, the subscriber equipment cell-of-origin forbidding in notification source community.

As shown in Figure 6, the method that in embodiment of the present invention cognitive radio system, frequency spectrum switching is carried out in base station comprises:

Step 601, base station are moved in the working frequency points of source;

Step 602, base station maintenance frequency point information for subsequent use, broadcast frequency point information for subsequent use in Bing community;

Whether step 603, base station to determine need to carry out frequency spectrum switches, and if so, performs step 604; Otherwise, execution step 602;

Frequency spectrum handoff procedure is carried out in step 604, base station, leaves source working frequency points, recovers community at target frequency.

As shown in Figure 7, the method that in embodiment of the present invention cognitive radio system, subscriber equipment carries out cell reselection comprises:

Step 701, subscriber equipment move in the working frequency points of source;

Step 702, subscriber equipment receive broadcast and obtain frequency point information for subsequent use;

Step 703, subscriber equipment judge whether to carry out cell reselection, if so, perform step 704; Otherwise, return to step 702;

Step 704, subscriber equipment are determined Target cell according to the frequency point information for subsequent use of obtaining recently, and carry out cell reselection process according to definite Target cell.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and amendment to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims

1. a method for cell reselection, is characterized in that, the method comprises:

2. the method for claim 1, is characterized in that, described subscriber equipment receives the frequency point information for subsequent use from network equipment, comprising:

Described subscriber equipment receives the frequency point information for subsequent use from network equipment by broadcast mode.

3. the method for claim 1, is characterized in that, described subscriber equipment is determined need to carry out cell reselection, comprising:

Described subscriber equipment, after definite cell-of-origin signal measurements is lower than the first measurement threshold value or after detecting that cell-of-origin is forbidden, is determined and need to be carried out cell reselection.

4. the method for claim 1, is characterized in that, described subscriber equipment, according to the frequency for subsequent use in described frequency point information for subsequent use, is determined Target cell, comprising:

Described subscriber equipment selects Yi Ge community as Target cell in all communities from part or all of frequency for subsequent use.

5. method as claimed in claim 4, is characterized in that, described subscriber equipment selects Yi Ge community as Target cell in all communities from part or all of frequency for subsequent use, comprising:

Signal measurements corresponding to part or all of community on described subscriber equipment determining section or whole frequency for subsequent use, from be greater than the signal measurements of the second measurement threshold value, select a signal measurements, and using the community corresponding signal measurements of selecting as Target cell.

6. the method for claim 1, is characterized in that, described subscriber equipment, according to the frequency for subsequent use in described frequency point information for subsequent use, is determined Target cell, comprising:

Described subscriber equipment is using the cell ID of cell-of-origin as cell ID corresponding to each frequency for subsequent use, or reception is from cell ID corresponding to the each frequency for subsequent use of described network equipment;

Described subscriber equipment, according to the frequency for subsequent use in described frequency point information for subsequent use and cell ID corresponding to frequency for subsequent use, is determined each frequency Shang for subsequent use community, and selects Yi Ge community as Target cell from all communities of determining.

7. method as claimed in claim 6, is characterized in that, described subscriber equipment selects Yi Ge community as Target cell from all communities of determining, comprising:

Signal measurements corresponding to described subscriber equipment determining section or whole frequency Shang for subsequent use community selected a signal measurements from be greater than the signal measurements of the second measurement threshold value, and using the community corresponding signal measurements of selecting as Target cell.

8. the method as described in claim 5 or 7, is characterized in that, signal measurements corresponding to part or all of community on described subscriber equipment determining section or whole frequency for subsequent use, comprising:

Described subscriber equipment order is determined signal measurements corresponding to frequency Shang for subsequent use community, and is greater than after the second measurement threshold value a signal measurements corresponding to frequency Shang You for subsequent use community, stops determining signal measurements corresponding to other communities.

9. the method as described in claim 5 or 7, is characterized in that, described subscriber equipment before Target cell, also comprises the community corresponding signal measurements of selecting:

Described subscriber equipment determines that the distance between described subscriber equipment and described network equipment is less than distance threshold value; Or

In definite part or all of other the available frequencies except the frequency that frequency point information for subsequent use comprises of described subscriber equipment, do not meet the frequency that cell reselection requires.

10. method as claimed in claim 9, is characterized in that, other available frequencies of part are frequency priority corresponding to frequency that corresponding frequency priority is not less than place, cell-of-origin.

11. methods as described in claim 5 or 7, is characterized in that, described subscriber equipment also comprises before determining signal measurements corresponding to community:

12. methods as claimed in claim 11, is characterized in that, other available frequencies of part are frequency priority corresponding to frequency that corresponding frequency priority is not less than place, cell-of-origin.

The method of 13. 1 kinds of cell reselections, is characterized in that, the method comprises:

14. methods as claimed in claim 13, is characterized in that, in described frequency point information for subsequent use, also comprise the Target Cell Identifier on frequency for subsequent use.

15. methods as claimed in claim 13, is characterized in that, described network equipment, by the frequency point information notifying user equipment described for subsequent use of determining, comprising:

Described network equipment sends frequency point information for subsequent use by broadcast to described subscriber equipment.

16. methods as described in as arbitrary in claim 13～15, is characterized in that, described network equipment, by after the frequency point information notifying user equipment described for subsequent use of determining, also comprises:

Described network equipment need to carry out after frequency spectrum switching definite, the subscriber equipment cell-of-origin forbidding in notification source community.

The subscriber equipment of 17. 1 kinds of cell reselections, is characterized in that, this subscriber equipment comprises:

18. subscriber equipmenies as claimed in claim 17, is characterized in that, described receiver module specifically for:

19. subscriber equipmenies as claimed in claim 17, is characterized in that, described Target cell determination module specifically for:

20. subscriber equipmenies as claimed in claim 17, is characterized in that, described Target cell determination module specifically for:

21. subscriber equipmenies as claimed in claim 20, is characterized in that, described Target cell determination module specifically for:

22. subscriber equipmenies as claimed in claim 17, is characterized in that, described Target cell determination module specifically for:

Using the cell ID of cell-of-origin as cell ID corresponding to each frequency for subsequent use, or receive from cell ID corresponding to the each frequency for subsequent use of described network equipment; According to the frequency for subsequent use in described frequency point information for subsequent use and cell ID corresponding to frequency for subsequent use, determine each frequency Shang for subsequent use community, and select Yi Ge community as Target cell from all communities of determining.

23. subscriber equipmenies as claimed in claim 22, is characterized in that, described Target cell determination module specifically for:

24. subscriber equipmenies as described in claim 21 or 23, is characterized in that, described Target cell determination module specifically for:

25. subscriber equipmenies as described in claim 21 or 23, is characterized in that, described Target cell determination module also for:

Determine that the distance between described subscriber equipment and described network equipment is less than distance threshold value; Or after determining and not meeting the frequency that cell reselection requires in part or all of other available frequencies except the frequency that frequency point information for subsequent use comprises, using the community corresponding signal measurements of selection as Target cell.

26. subscriber equipmenies as claimed in claim 25, is characterized in that, other available frequencies of part are frequency priority corresponding to frequency that corresponding frequency priority is not less than place, cell-of-origin.

27. subscriber equipmenies as described in claim 21 or 23, is characterized in that, described Target cell determination module also for:

28. subscriber equipmenies as claimed in claim 27, is characterized in that, other available frequencies of part are frequency priority corresponding to frequency that corresponding frequency priority is not less than place, cell-of-origin.

The network equipment of 29. 1 kinds of cell reselections, is characterized in that, this network equipment comprises:

30. network equipments as claimed in claim 29, is characterized in that, in described frequency point information for subsequent use, also comprise the Target Cell Identifier on frequency for subsequent use.

31. network equipments as claimed in claim 29, is characterized in that, described sending module specifically for:

Send frequency point information for subsequent use by broadcast to described subscriber equipment.

32. network equipments as described in as arbitrary in claim 29～31, is characterized in that, described sending module specifically for:

After the frequency point information notifying user equipment described for subsequent use of determining, need to carry out after frequency spectrum switching the subscriber equipment cell-of-origin forbidding in notification source community definite.

The system of 33. 1 kinds of cell reselections, is characterized in that, this system comprises: