WO2010075799A1

WO2010075799A1 - Cell reselection method and device

Info

Publication number: WO2010075799A1
Application number: PCT/CN2009/076319
Authority: WO
Inventors: 于映辉; 邓天乐; 李安俭
Original assignee: 华为技术有限公司
Priority date: 2008-12-31
Filing date: 2009-12-31
Publication date: 2010-07-08
Also published as: CN101772118B; CN101772118A

Abstract

A cell reselection method and device are disclosed in the embodiments of the present invention, wherein the cell reselection method comprises the steps of: receiving the priority assigned to a cell by a base station; performing cell reselection according to the priority of the cell and a path loss measurement result. The cell reselection device includes: a first receiving unit for receiving the priority assigned to the cell by the base station; a reselection unit for performing cell reselection according to the priority of the cell and the path loss measurement result. The cell reselection method and device, when performing reselection for heterogeneous network cells, are able to avoid the unnecessary uplink interference caused by mis-selecting a cell and improve the throughput of a system.

Description

The present invention claims the priority of the Chinese patent application filed on Dec. 31, 2008, the Chinese Patent Application No. 2008 1024 743 4.6, the title of the invention is "Cell Re-election Method and Apparatus", the entire contents of which are incorporated by reference. Combined in this application. The present invention relates to the field of communications technologies, and in particular, to a cell reselection method and apparatus. BACKGROUND With the development of mobile communication technologies, mobile communication systems have been developed to the third generation. In order to maintain long-term competitive advantages, the standardization of Long Term Evolution (LTE) is underway, and the needs of users are becoming more and more Diversification, system equipment has also diversified in order to adapt to this demand, and the network of home interior coverage and enterprise-level internal coverage base stations and some other hotspot coverage have attracted attention. Such a network may be a Home NodeB, an Access Point (AP), a Private Network, a micro cell, and a pico cell. The characteristics of these cells are that the coverage is small, and the transmission power of the base station is smaller than that of the macro cell. It is considered that the base station transmission power of the macro cell and the small coverage cell may be different by 16 dB.

In the tenth version of the LTE to LTE (R10) phase, with the increase in system throughput and improved edge efficiency requirements, relay nodes and coordinated multipoint transmission/reception (CoMP) The APs in the ) are all introduced, and the coverage of these nodes is relatively small, and the transmission power is also small.

In the prior art, when a terminal device (UE) is in a scenario of a macro cell and a pico cell, when the pico cell and the macro cell that are neighbor cells are in the same frequency, the terminal device (UE) usually selects the macro cell as a service. Community. The selection of the UE may result in a strong transmission power when the UE initiates a service to the serving cell, and a strong interference to the neighboring cell. That is, when the UE is at When the heterogeneous network with different transmit powers of the cell base station is used, according to the existing judgment of the received signal level as the serving cell of the selected UE, the serving cell of the selected UE may be inappropriate, causing the UE to initiate a service to the serving cell. The transmission power is strong, causing strong interference to neighboring cells, which causes defects such as increased interference signals of the network system and reduced system throughput. Summary of the invention

The embodiment of the invention provides a cell reselection method and device, so as to avoid unnecessary uplink interference caused by mis-selection of cells when performing heterogeneous network cell reselection.

The embodiment of the invention provides a cell reselection method, and the method includes:

Receiving a priority assigned by the base station to the cell;

Cell reselection is performed according to the priority of the cell and the path loss measurement result.

The embodiment of the invention provides a cell reselection device, and the device includes:

a first receiving unit, configured to receive a priority assigned by the base station to the cell;

And a reselecting unit, configured to perform cell reselection according to the priority of the cell and the path loss measurement result.

When the cell reselection method and the device reselect the heterogeneous network cell, the priority information and the path loss condition of the cell are comprehensively considered, thereby avoiding unnecessary uplink interference caused by the wrongly selected cell, and improving The throughput of the system. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart of Embodiment 1 of a cell reselection method according to the present invention;

2 is a flowchart of Embodiment 2 of a cell reselection method according to the present invention

FIG. 3 is a flowchart of Embodiment 3 of a cell reselection method according to the present invention

4 is a flowchart of Embodiment 4 of a cell reselection method according to the present invention.

FIG. 5 is a flowchart of Embodiment 5 of a cell reselection method according to the present invention

6 is a flowchart of Embodiment 6 of a cell reselection method according to the present invention; 7 is a flowchart of Embodiment 7 of a cell reselection method according to the present invention;

8 is a flowchart of Embodiment 8 of a cell reselection method according to the present invention;

FIG. 9 is a schematic structural diagram of an embodiment of a cell reselection apparatus according to the present invention. DETAILED DESCRIPTION OF THE INVENTION The inventors have found through analysis that in the prior art, cell reselection is performed only according to the received power, regardless of the path loss, so that the UE will choose to camp on the macro cell in most cases. When the UE chooses to camp on the macro cell, if the path loss of the UE to the macro cell is greater than the path loss of the UE to the pico cell, that is, the UE sends data to the macro cell and needs to use a higher transmit power than the transmit to the pico cell. Therefore, if the UE wants to initiate a service to the macro cell, it will cause strong interference to the pico cell, thereby reducing the throughput of the system. The macro cell here represents a wireless node with a large transmit power, and the pico cell represents a wireless node with a small transmit power. Two different types of nodes make up a heterogeneous network.

To this end, the present invention provides the following examples. The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments.

As shown in FIG. 1 , it is a flowchart of Embodiment 1 of a cell reselection method according to the present invention, where the method includes: Step a: receiving a priority assigned by a base station to a cell;

Step b: Perform cell reselection according to the priority of the cell and the path loss measurement result.

The embodiment of the present invention considers the priority information of the cell and the path loss condition, and performs cell reselection; because the path loss reflects the large-scale attenuation between the UE and the node, it can faithfully reflect the wireless channel of the UE to which node. Preferably, it is possible to avoid selecting the wrong cell and causing unnecessary uplink interference. The following describes the process of cell reselection for different situations in the second embodiment to the eighth embodiment of the cell reselection method of the present invention.

An embodiment of the cell reselection method includes:

The receiving base station assigns a priority to each cell, where the foregoing cell includes a serving cell and a neighboring cell; and performs cell reselection according to the priority of each cell and the path loss measurement result. In this embodiment, the cell reselection is performed by using the path loss and the priority as the reference condition in the case of the inter-frequency. For the specific embodiment, refer to the second embodiment of the cell reselection method of the present invention.

As shown in FIG. 2, it is a flowchart of Embodiment 2 of a cell reselection method according to the present invention. The method includes: Step 101: Receive a priority assigned by a base station to each cell, where the cell includes a serving cell and a cell.

Before receiving the priority assigned by the base station to each cell, the base station allocates a priority to each cell by using a common signaling manner or a dedicated signaling manner according to the frequency layer in which the cell is located.

Step 102: Determine whether the priority of the neighboring cell is higher than the priority of the serving cell. If the priority of the neighboring cell is higher than the priority of the serving cell, perform step 103, if the priority of the neighboring cell is the same as the priority of the serving cell. Then, in step 104, if the priority of the neighboring cell is lower than the priority of the serving cell, step 105 is performed.

Step 103: If the path loss of the neighboring cell is less than the set threshold, the neighboring cell is selected as the resident cell.

When the priority of the neighboring cell is higher than the priority of the serving cell, if the path loss of the neighboring cell satisfies the set condition, the neighboring cell is selected as the camping cell.

Step 104: Select a camping cell according to the sorting criterion.

When the priority of the neighboring cell and the priority of the serving cell are the same, similar to the received power mode, the camped cell is also selected according to the sorting criterion, except that the setting of the hysteresis amount and the offset amount is different from the receiving power mode. Based on the path loss mode, the specific formula is as follows:

Rs= Qmeas _jS +QhySt _s

Rn— Qmeas, n"Qoffset

Where Rs is the total result of the path loss of the serving cell, Qmeas, s is the path loss value measured by the serving cell, and Qhysts is the amount of hysteresis added for the serving cell. Rn is the total road loss result of the cell, Qmeas, n is the measured path loss value of the cell, and Qoffset is the offset set for the neighbor cell.

Step 105: If the path loss of the serving cell is greater than the set threshold, and the path loss of the neighboring cell is less than When the threshold is determined, the above-mentioned partial cell is selected as the camping cell.

When the priority of the neighboring cell is lower than the priority of the serving cell, similar to the received power mode, only when the path loss of the serving cell is greater than the set threshold, and the path loss of the low priority cell is less than the set threshold, The low priority cell is a camped cell.

The above cell reselection method considers the path loss on the basis of assigning priorities to the serving cell and the neighboring cell, and reselects the heterogeneous network cell, thereby avoiding unnecessary uplink interference caused by the wrongly selected cell, and improving The throughput of the system.

Another embodiment of the cell reselection method includes:

Receiving a respective path loss threshold or receiving power threshold set by the base station for neighboring cells having different priorities;

When the neighboring cell satisfies the set path loss threshold and/or the received power threshold, the cell reselection is performed according to the measurement result of the path loss or the received power.

In this embodiment, the path loss and the received power level are used as reference conditions in the case of the inter-frequency, and the cell reselection is also considered in consideration of the priority. For the specific embodiment, refer to the third embodiment of the cell reselection method of the present invention. Example 6.

As shown in FIG. 3, it is a flowchart of Embodiment 3 of a cell reselection method according to the present invention. The method includes: Step 201: Receive a respective path loss threshold set by a base station for neighboring cells with different priorities.

The foregoing neighboring cells having different priorities include neighbor cells having high priority, low priority, and the same priority. The path loss thresholds may be the same or different.

Step 202: When the path loss values of the neighboring cells with different priorities are smaller than the respective path loss thresholds, the camping cells are selected according to the neighboring cell received power and the priority of the neighboring cell.

When cells with different priorities satisfy respective path loss conditions, the cell selection may be performed according to the cell reselection criteria of the received power level.

Certainly, the cells satisfying the respective path loss conditions may be all neighboring cells or a part of neighboring cells. If only a part of neighboring cells meet the requirements, only the part of the cells may be used. Choose by priority.

The above cell reselection method reselects the heterogeneous network cell based on the received power level in consideration of the path loss, thereby avoiding unnecessary uplink interference caused by the wrongly selected cell and improving the throughput of the system.

As shown in FIG. 4, it is a flowchart of Embodiment 4 of a cell reselection method according to the present invention. The method includes: Step 301: Receive a respective received power threshold set by a base station for neighboring cells with different priorities.

The foregoing neighboring cells having different priorities include neighboring cells having high priority, low priority, and the same priority; the received power thresholds may be the same or different.

Step 302: When the received power of the neighboring cells with different priorities is greater than the received power threshold, the camped cell is selected according to the path loss value of the neighboring cell and the priority of the neighboring cell.

When the cells with different priorities satisfy the respective received power conditions, the cell selection may be performed according to the path loss-based cell reselection criterion; the path loss-based cell reselection criterion and the cell reselection method of the present invention. Steps 102 to 105 in the same are the same, and are not described here.

Certainly, the cells that meet the respective receiving power conditions may be all neighboring cells, or may be a part of neighboring cells. If only a part of the neighboring cells meet the requirements, the path loss value and the priority may be selected only in the part of the cells.

The above cell reselection method, based on the received power level, reselects the heterogeneous network cell based on the path loss condition, avoids unnecessary uplink interference caused by the wrongly selected cell, and improves the throughput of the system.

As shown in FIG. 5, it is a flowchart of Embodiment 5 of a cell reselection method according to the present invention. In this embodiment, a priority of a neighboring cell is higher than a priority of a serving cell, and the method includes:

Step 401: Receive a road loss threshold and a received power threshold set by the base station for the high priority neighboring cell.

The base station on the network side sets two thresholds of path loss and received power for the high-priority neighboring cell; the terminal device receives the above two thresholds. Wherein, since the road loss threshold has been set, so that the terminal The cell is selected by the path loss, so the set receiving power threshold may not be a key factor for cell selection. The purpose of setting the received power threshold is to ensure that the selected cell can meet the minimum requirement for providing normal service to the terminal.

Step 402: Select a neighboring cell whose path loss value is smaller than the path loss threshold and whose received power is greater than the received power threshold as the camping cell.

The terminal device selects a cell that simultaneously satisfies two set thresholds as a camping cell.

Step 403: When there are multiple neighbor cells selected as the camping cells, the neighboring cells are selected as the camping cells in the order of the path loss values from small to large or in the order of receiving power from large to small.

When there are a plurality of neighboring cells selected as the camping cells, the terminal devices select the neighboring cells as the camping cells in descending order of the path loss values or in descending order of the received power.

In the foregoing cell reselection method, when the priority of the neighboring cell is higher than the priority of the serving cell, the heterogeneous network cell is reselected in consideration of the received power level and the path loss, thereby avoiding simultaneous inclusion in the neighboring cell. In the case of a macro cell and a pico cell, in the prior art, the problem of a macro cell having a large path loss is preferentially selected, that is, unnecessary uplink interference caused by a misselected cell is avoided, and the throughput of the system is improved.

As shown in FIG. 6 , it is a flowchart of Embodiment 6 of a cell reselection method according to the present invention. In this embodiment, a priority of a neighboring cell is lower than a priority of a serving cell, and the method includes:

Step 501: The receiving base station sets a respective path loss threshold and a received power threshold for the low priority neighbor cell and the high priority serving cell.

The base station on the network side sets two thresholds of path loss and received power for each of the low-priority neighboring cell and the high-priority serving cell; the terminal device receives the above two thresholds.

Step 502: When the path loss value of the serving cell is greater than the path loss threshold of the serving cell and/or the receiving power of the serving cell is smaller than the receiving power threshold of the serving cell, and the path loss of the neighboring cell is smaller than the path loss threshold of the neighboring cell and When the received power of the neighboring cell is greater than the received power threshold of the neighboring cell, the neighboring cell is selected as the camping cell.

When the serving cell satisfies the set two thresholds at the same time, or only one of the settings is satisfied When the value is wide, and the neighboring cell satisfies the set two thresholds at the same time, the terminal device may select the neighboring cell as the camping cell.

Step 503: When there are multiple neighboring cells selected as the camping cells, the neighboring cells are selected as the camping cells in descending order of the path loss values or in descending order of the received power.

When there are multiple neighbor cells that can be used as camped cells, the terminal device can select the best cell as the camping cell according to the path loss or the received power level.

In the above cell reselection method, when the priority of the neighboring cell is lower than the priority of the serving cell, the heterogeneous network cell is reselected in consideration of the received power level and the path loss, thereby avoiding the mismatched cell. Unnecessary uplink interference increases the throughput of the system.

The cell reselection method in the embodiment of the present invention includes:

Calculating the path loss corresponding to each of the same priority cells according to the transmit power of the same priority cell included in the information from the base station;

Receiving high priority information or increased offset information set for the same priority cell with small path loss; the offset information may be provided by the base station, and the neighboring cell with small path loss is the path loss of the serving cell and the neighboring cell a neighboring cell whose path loss difference reaches a set threshold;

The same priority cell is selected according to the above-mentioned high priority information in order of priority from high to low or according to the above-mentioned offset amount information according to the ranking criterion after increasing the above offset amount.

In this embodiment, in the case of the same frequency or the same priority, the path loss and the received power level are used as reference conditions for cell reselection. For details, see Embodiment 7 to Embodiment 8 of the cell reselection method of the present invention. .

As shown in FIG. 7 , it is a flowchart of Embodiment 7 of a cell reselection method according to the present invention. The method includes: Step 601: Calculate, according to a transmit power of a same priority cell included in information from a base station, Road damage.

The base station broadcasts the transmit power of the serving cell and the neighboring cell by means of broadcast, and the UE can calculate the path loss of the serving cell and the neighboring cell according to the received transmit power.

Step 602: Receive a path loss difference between the same priority cells from the base station to reach a setting. When the value is wide, the high priority information is set for the same priority cell with a small path loss.

When the path loss difference between the serving cell and the neighboring cell reaches a set threshold, it is determined that the cell with a small path loss has a high priority. The threshold at this time can be either an absolute threshold or a relative threshold.

Step 603: Select the same priority cell according to the high priority information according to the highest priority to the highest priority.

The terminal equipment selects the same priority cell in the order of priority from high to low.

In the above cell reselection method, in the case of the same priority, the path loss is set to a different priority for the cell, and then the cell reselection is performed based on the priority information pair, thereby avoiding unnecessary uplink interference caused by the wrongly selected cell. , improve the throughput of the system.

As shown in FIG. 8 , it is a flowchart of Embodiment 8 of a cell reselection method according to the present invention. The method includes: Step 701: Calculate, according to a transmit power of a same priority cell included in information from a base station, Road damage.

The UE may calculate a path loss condition or a path loss level of the serving cell and the neighboring cell according to the transmit power or the transmit power level and the received power level of the UE.

Step 702: Receive offset information added by the base station when the path loss difference between the same priority cells reaches a set threshold, and the same priority cell with a small path loss.

According to the path loss condition or the path loss level, the base station can add an offset amount Q _pass i to the side with the small path loss. Th. In this way, regardless of whether the receiving power mode, the path loss mode, or a combination of the two, the cell with small path loss obtains an offset configuration, so that the receiving signal level of the cell with small path loss is higher, thereby making it The final sorting result is better, and the UE is more likely to select a cell with a small path loss. But the bias value Q _path i. _Ss is not a one-to-one bias value, but a general offset for cells with small path loss, which can be distinguished from the one-to-one bias value in the R criterion. The specific formula is as follows:

Rs= Qmeas _jS +QhySt _s

Rn— Qmeas, n"Qoffset"Qpathloss

Step 703, according to the above offset amount information, according to the above formula after increasing the offset amount The ranking criteria are selected above the same priority cell.

The UE may select the same priority cell according to the ranking criterion after increasing the offset amount. The above cell reselection method, in the case of the same priority, considers the path loss condition, and uses the ranking criterion based on the path loss setting to reselect the heterogeneous network cell of the same priority, thereby avoiding the problem caused by the wrongly selected cell. Unnecessary uplink interference increases system throughput.

As shown in FIG. 9, a schematic structural diagram of an embodiment of a cell reselection apparatus according to the present invention includes: a first receiving unit 11 configured to receive a priority allocated by a base station for a cell; and a reselecting unit 12 configured to use the foregoing cell according to the foregoing The priority and path loss measurement results are used for cell reselection.

The foregoing re-selection unit may include a first reselection module, a second reselection module, or a third reselection module. The first reselection module is configured to be a priority ratio of the neighboring cell. When the priority of the serving cell is high, if the path loss of the neighboring cell is less than the set threshold, the neighboring cell is selected as the camping cell; the second reselecting module is used for the priority of the neighboring cell and the priority of the serving cell. When the same, the camping cell is selected according to the sorting criterion, where the hysteresis amount and the offset amount used in the foregoing sorting criterion are set based on the path loss mode; the third reselecting module is used when the neighboring cell has a priority ratio to the serving cell When the priority of the serving cell is low, if the path loss of the serving cell is greater than the set threshold, and the path loss of the neighboring cell is less than the set threshold, the neighboring cell is selected as the camping cell.

In order to perform cell reselection on the basis of the priority information and the path loss condition, the device may further include: a second receiving unit 13 configured to receive, by the first receiving unit 11, the base station for cell allocation. After the priority, the receiving base station sets a respective path loss threshold and/or a received power threshold for the neighboring cells with different priorities; the reselecting unit 12 is configured to: when the neighboring cell meets the set path loss threshold and/or Or when receiving the power threshold, the cell reselection is performed according to the measurement result of the path loss or the received power. Further, the re-unit may include: a fourth re-selection module, configured to: when a path loss value of at least one neighboring cell having different priorities in all neighboring cells is smaller than a respective path loss threshold, according to the neighboring cell receiving power and the neighboring cell a priority of the cell, selecting a camping cell from the neighboring cells smaller than the road loss threshold; or, a fifth reselecting module, used in all neighboring cells When the received power of the at least one neighboring cell having different priorities is greater than the respective received power thresholds, selecting the camping cell from the neighboring cells greater than the received power threshold according to the path loss value of the neighboring cell and the priority of the neighboring cell; Or the sixth reselection module is configured to: when the priority of the neighboring cell is higher than the serving cell, select a neighboring cell whose path loss value is smaller than the path loss threshold and the received power is greater than the received power threshold as the camping cell.

In addition, the foregoing apparatus may further include: a third receiving unit 14 configured to: after the second receiving unit 13 receives the respective path loss threshold or the received power threshold set by the base station for the neighboring cells with different priorities, the receiving base station has The respective path loss thresholds or received power thresholds of the service cells of different priorities are set; the reselection unit 12 includes: a seventh reselection module, configured to: when the priority of the neighboring cell is lower than the serving cell, when the serving cell The path loss value is greater than the path loss threshold of the serving cell and/or the receiving power of the serving cell is smaller than the receiving power threshold of the serving cell, and the path loss of the neighboring cell is smaller than the path loss threshold of the neighboring cell and the receiving power of the neighboring cell is greater than When the received power of the neighboring cell is wide, the neighboring cell is selected as the camping cell.

Further, when the number of neighbor cells selected by the sixth reselection module or the seventh re-module as the camping cell is multiple, the selection module may be in accordance with the path loss value from small to large or received power from large to small. The neighboring cells are sequentially selected as the camping cells.

In order to perform cell reselection on the cell of the same priority, the foregoing apparatus may further include: a calculating unit 15 , configured to: after the first receiving unit 11 receives the priority allocated by the base station for the cell, according to the information included in the information from the base station The transmission power of the priority cell is calculated, and the path loss corresponding to the cell of the same priority is calculated. The reselection unit 12 includes: a processing unit, configured to receive high priority information or increased offset information from the base station, where the high priority is performed. The information or the added offset information is set by the base station when the path loss of the serving cell and the neighboring cell reaches a set threshold, and is set for the same priority cell with a small path loss; the reselection module is configured to use the high priority according to the foregoing The information is selected in the order of priority from high to low or according to the offset amount information according to the ranking criterion after increasing the offset amount. The above-mentioned threshold may be a relative threshold or an absolute threshold.

The cell reselection device receives, by using the first receiving unit, the optimal allocation of the base station for each cell. First, the second receiving unit and the third receiving unit set different road loss thresholds or received power thresholds for different priority cells, calculate the path loss for the same priority cell through the calculating unit, and implement the path through the reselecting unit. In the case of the loss and the received power level, the re-selection of the heterogeneous network cell avoids unnecessary uplink interference caused by the wrongly selected cell, and improves the throughput of the system.

It should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments. Modifications or equivalents are made without departing from the spirit and scope of the invention.

Claims

Rights request

A cell reselection method, characterized in that:

Receiving a priority assigned by the base station to the cell;

The cell reselection method according to claim 1, wherein the performing cell reselection according to the priority of the cell and the path loss measurement result includes one or any combination of the following: If the priority of the serving cell is higher than the priority of the serving cell, if the path loss of the neighboring cell is less than the set threshold, the neighboring cell is selected as the camping cell;

When the priority of the neighboring cell and the priority of the serving cell are the same, the camping cell is selected according to the ranking criterion, where the delay amount and the offset amount used in the sorting criterion are set in the path loss mode;

When the priority of the neighboring cell is lower than the priority of the serving cell, if the path loss of the serving cell is greater than the set threshold, and the path loss of the neighboring cell is less than the set threshold, the neighboring cell is selected as the resident. Stay in the community.

The cell reselection method according to claim 1, wherein the performing, before performing cell reselection according to the priority of the cell and the path loss measurement result, further comprising:

Receiving a respective path loss threshold and/or a receiving power threshold set by the base station for neighboring cells having different priorities;

Performing cell reselection according to the priority of the cell and the path loss measurement result includes: when the neighboring cell satisfies the set path loss threshold and/or the received power threshold, according to the measurement result of the path loss or the received power Perform cell reselection.

The cell reselection method according to claim 3, wherein when the neighboring cell satisfies the set path loss threshold and/or the received power threshold, the path loss or the received power measurement result is performed. Cell reselection includes:

When at least one neighboring cell with different priorities in all neighboring cells has a path loss value smaller than the respective When the path loss is wide, the camping cell is selected from the neighboring cells smaller than the road loss threshold according to the received power of the neighboring cell and the priority of the neighboring cell; or

When the received power of at least one neighboring cell having different priorities in all neighboring cells is greater than the respective received power thresholds, the neighboring cells larger than the received power threshold are used according to the path loss value of the neighboring cell and the priority of the neighboring cell. Select the camping cell; or,

When the priority of the neighboring cell is higher than that of the serving cell, the neighboring cell whose path loss value is smaller than the path loss threshold and whose received power is greater than the received power threshold is selected as the camping cell.

The cell reselection method according to claim 3, wherein when the neighboring cell satisfies the set road loss threshold and/or the received power threshold, the measurement is performed according to the path loss or the received power measurement result. Before the cell re-election, it also includes:

Receiving, by the base station, respective road loss thresholds and/or receiving power thresholds for the serving cells having different priorities;

When the neighboring cell satisfies the set path loss threshold and/or the received power threshold, the 'j, zone reselection according to the path loss or the received power measurement result includes:

When the priority of the neighboring cell is lower than the serving cell, the path loss value of the serving cell is greater than the path loss threshold of the serving cell and/or the received power of the serving cell is smaller than the receiving power threshold of the serving cell, and the path loss of the neighboring cell When the path loss threshold of the neighboring cell and the received power of the neighboring cell are greater than the received power threshold of the neighboring cell, the selected cell is used as the camping cell.

The cell reselection method according to claim 4 or 5, further comprising: when the number of neighbor cells selected as the camping cell is plural, according to the path loss value from small to large or by receiving The neighboring cells are selected as the camping cells in order of power from large to small.

The cell reselection method according to claim 1, wherein the performing, before performing cell reselection according to the priority of the cell and the path loss measurement result, further includes:

Performing cell reselection according to the priority of the cell and the path loss measurement result includes: Receiving high priority information or increased offset information set for the same priority cell with small path loss; the neighboring cell with the small path loss is the path loss of the serving cell and the path loss of the neighboring cell reaches the set width a neighboring cell of value;

The same priority cell is selected according to the high priority information in descending order of priority, or according to the offset information according to the ranking criterion after increasing the offset.

8. A cell reselection device, comprising:

The cell reselection apparatus according to claim 8, wherein the reselection unit comprises:

a first reselection module, configured to: when the priority of the neighboring cell is higher than the priority of the serving cell, if the path loss of the neighboring cell is less than the set threshold, the neighboring cell is selected as the camping cell; and/or And a second reselection module, configured to: when the priority of the neighboring cell and the priority of the serving cell are the same, select a camping cell according to the sorting criterion, where the hysteresis amount and the offset amount used in the sorting criterion are based on Set by way of path loss; and / or,

a third reselection module, configured to: when the priority of the neighboring cell is lower than the priority of the serving cell, if the path loss of the serving cell is greater than the set threshold, and the path loss of the neighboring cell is less than the set threshold, Then, the neighboring cell is selected as a camping cell.

The cell reselection apparatus according to claim 8, further comprising: a second receiving unit, configured to: after the first receiving unit receives the priority allocated by the base station for the cell, the receiving base station has different priorities The respective road loss thresholds and/or received power thresholds set by the neighboring cells of the level;

The reselection unit is configured to perform cell reselection according to the measurement result of the path loss or the received power when the neighboring cell satisfies the set path loss threshold and/or the received power threshold.

11. The cell reselection apparatus according to claim 10, wherein said reselection The unit includes:

a fourth reselection module, configured to: when a path loss value of at least one neighboring cell having different priorities in all neighboring cells is smaller than a respective path loss threshold, according to the received power of the neighboring cell and the priority of the neighboring cell, Selecting a camping cell in a neighboring cell that is smaller than the path loss threshold; or

a fifth reselection module, configured to: when the received power of at least one neighboring cell having different priorities in all neighboring cells is greater than a respective receiving power threshold, according to the neighboring cell path loss value and the priority of the neighboring cell, Selecting a camping cell in a neighboring cell that is greater than a received power threshold; or,

And a sixth reselection module, configured to: when the priority of the neighboring cell is higher than the serving cell, select a neighboring cell whose path loss value is smaller than the path loss threshold and the received power is greater than the received power threshold as the camping cell.

The cell reselection apparatus according to claim 11, further comprising: a third receiving unit, configured to receive, by the threshold receiving base station, respective path loss threshold values set for the serving cells with different priorities and/or Or receiving power thresholds;

The reselection unit includes:

a seventh reselection module, configured to: when the priority of the neighboring cell is lower than the serving cell, when the path loss value of the serving cell is greater than the path loss threshold of the serving cell and/or the receiving power of the serving cell is smaller than the receiving power of the serving cell If the path loss of the neighboring cell is smaller than the path loss threshold of the neighboring cell and the received power of the neighboring cell is greater than the received power of the neighboring cell, the neighboring cell is selected as the camping cell.

The cell reselection apparatus according to claim 11 or 12, further comprising:

a selecting module, configured to select, according to the path loss value, the order of the path loss values from small to large or the order of receiving power from large to small when the sixth neighboring module or the seventh re-module selects the neighboring cells as the camping cell as multiple The neighboring cell acts as a camping cell.

The cell reselection apparatus according to claim 8, further comprising: a calculating unit, configured to: after the first receiving unit receives the priority allocated by the base station for the cell, according to the information from the base station The transmission power of the same priority cell is calculated, and the path loss corresponding to each priority cell is calculated; The reselection unit includes:

a processing unit, configured to receive high priority information or increased offset information set for a same priority cell with a small path loss; the adjacent cell with a small path loss is a path loss of the serving cell and a path loss difference of the neighboring cell a neighboring cell that reaches a set threshold;

a reselection module, configured to select the same priority cell according to the high priority information according to a priority from high to low, or according to the offset information according to an ordering criterion after increasing the offset .