WO2012130125A1

WO2012130125A1 - Method and apparatus for determining sub-frame information

Info

Publication number: WO2012130125A1
Application number: PCT/CN2012/073062
Authority: WO
Inventors: 潘学明; 沈祖康
Original assignee: 电信科学技术研究院
Priority date: 2011-03-29
Filing date: 2012-03-26
Publication date: 2012-10-04
Also published as: CN102170657B; CN102170657A

Abstract

The embodiment of the present invention relates to the technical field of wireless communication, in particular to a method and an apparatus for determining sub-frame information, which are used for acquiring sub-frame information of a neighbor cell when uplink and downlink service proportion demands in a cell are in the dynamic change. The method provided by the embodiment of the present invention comprises the following steps: measuring a signal of equipment at network side of a neighbor cell in each sub-frame of a sub-frame set, determining a measurement result, wherein the sub-frame of the sub-frame set is determined by the sub-frame type of a sub-frame in a wireless frame configured in the present cell, the sub-frame type of the sub-frame in the wireless frame comprises a variable sub-frame, which is a sub-frame with variable transmission direction; and determining the sub-frame information of the same sub-frame in the neighbor cell according to the measurement result, or reporting the measurement result to an upper layer network node to inform the upper layer network node to determine the sub-frame information of the same sub-frame in the neighbor cell according to the measurement result. By adopting the embodiment of the present invention, when the uplink and the downlink service proportion demands in the cell are in the dynamic change, the sub-frame information of the neighbor cell can be acquired, so that the system performance can be improved.

Description

Method and device for determining subframe information This application claims to be submitted to the Chinese Patent Office on March 29, 2012, with the application number 201110076609.3, and the invention name is

The priority of the Chinese Patent Application for "Method and Apparatus for Determining Subframe Information" is incorporated herein by reference in its entirety. The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for determining subframe information. BACKGROUND OF THE INVENTION For a basic duplex mode used in a cellular system, a time division duplex (TDD) mode refers to that the uplink and downlink use the same working frequency band to transmit uplink and downlink signals at different time intervals. There is a GP (Guard Period) between the uplink and the downlink. The FDD (Frequency Division Duplex) mode refers to the use of different working bands on the uplink and downlink, and uplink and downlink on different frequency carriers at the same time. For the transmission of the line signal, there is GB (Guard Band) between the uplink and the downlink.

LTE (Long Term Evolution) The frame structure of the TDD system is slightly more complicated. As shown in FIG. 1A, a radio frame has a length of 10 ms, and includes 10 subframes of a special subframe and a regular subframe. Each subframe is Lms. The special subframe is divided into three subframes: DwPTS (Downlink Pilot Time Slot) for transmitting PSS (Primary Synchronization Signal), PDCCH (Physical Downlink Control Channel), PHICH (Physical HARQ Indication Channel), PCFICH (Physical Control Format Indication Channel), PDSCH (Physical Downlink Shared Channel), etc. The protection interval between the downlink and the uplink; UpPTS (Uplink Pilot Time Slot) is used to transmit SRS (Sounding Reference Signal) and PRACH (Physical Random Access Channel). Wait. The regular subframe includes an uplink subframe and a downlink subframe, and is used for transmitting an uplink/downlink control channel and service data. In a radio frame, two special subframes (located in subframes 1 and 6) or a special subframe (located in subframe 1) may be configured, where subframe 0 and subframe 5 and special subframes The DwPTS subframe is always used for downlink transmission, and the UpPTS subframe in subframe 2 and special subframe is always used for uplink transmission, and other subframes can be configured to be used for uplink transmission or downlink transmission as needed.

In the TDD system, the uplink and downlink transmissions use the same frequency resource, and the uplink/downlink signals are transmitted on different subframes. In common TDD systems, including 3G TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system and 4G TD-LTE (Time Division-Long Term) Evolution, time-division long-term evolution) System, the division of uplink and downlink subframes is static or semi-static. Generally, the proportion of uplink and downlink subframes is determined and remains unchanged according to the cell type and approximate service ratio in the network planning process. . This is a relatively simple approach in the context of large coverage of macro cells, and is also more effective. With the development of technology, more and more low-power base stations such as Pico cells and Home NodeBs are deployed to provide local small coverage. In such cells, the number of users is small, and The user service requirements vary greatly. Therefore, there is a dynamic change in the proportion of uplink and downlink services in the cell.

In an actual system, if different cells are configured with different uplink and downlink subframe configurations, the intersecting slots of the neighboring cells may be disturbed. As shown in FIG. 1B, in a time slot in which a macro cell transmits a downlink signal, a femto cell is used for uplink signal reception, and a base station-base station interference occurs between two cells, and a femto base station (femto NodeB) directly Receiving the downlink signal of the macro base station (Macro NodeB) will seriously affect the shield of the femto base station receiving the uplink signal of the L-UE (Local UE, local UE).

The neighbor cells herein may be cells that are geographically adjacent and use the same TDD carrier (shown in Figure 1B), or cells that are geographically overlapping and use adjacent TDD carriers (shown in Figure 1C).

In summary, when the current uplink and downlink service ratio requirements of the cell are dynamically changed, there is no scheme for obtaining the subframe information of the neighboring cell. The present invention provides a method and a device for determining subframe information, which can be used to obtain subframe information of a neighboring cell when the uplink and downlink traffic ratio requirements of the cell are dynamically changed.

A method for determining subframe information according to an embodiment of the present invention includes:

Measure the signal of the neighboring cell network side device in each subframe in the subframe set, and determine the measurement result, where the subframe in the subframe set is the subframe type determination of the subframe in the radio frame configured by the local cell. The subframe type of the subframe in the radio frame includes a variable subframe, where the variable subframe is a subframe with a variable transmission direction;

According to the measurement result, the subframe information of the same subframe in the neighboring cell is determined or the measurement result is sent to the upper layer network node, and the upper layer network node is notified to determine the subframe information of the same subframe in the neighboring cell.

An apparatus for determining subframe information according to an embodiment of the present invention includes:

a measuring module, configured to measure a signal of a neighboring cell network side device in each subframe in the subframe set, and determine a measurement result, where the subframe in the subframe set is a subframe in a radio frame configured according to the local cell Determining, by the subframe type, the subframe type of the subframe in the radio frame includes a variable subframe, where the variable subframe is a subframe with a variable transmission direction, and the processing module is configured to determine, in the neighboring cell, according to the measurement result. The subframe information of the same subframe is reported to the upper-layer network node, and the upper-layer network node is notified to determine the subframe information of the same subframe in the neighboring cell.

A system for determining subframe information according to an embodiment of the present invention includes: a network side device, configured to measure a signal of a neighboring cell network side device in each subframe in the subframe set, determine a measurement result, and send the measurement result to the upper layer network node, where the subframe in the subframe set The subframe type of the subframe in the radio frame is determined by the subframe type of the subframe in the radio frame, where the subframe type of the subframe includes a variable subframe, and the variable subframe is a subframe with a variable transmission direction. ;

The upper layer network node device is configured to determine subframe information of the same subframe in the neighboring cell by using the measurement result.

The embodiment of the present invention determines the subframe information of the same subframe in the neighboring cell according to the measurement result of the signal of the neighboring cell network side device in each subframe in the subframe set, or sends the measurement result to the upper layer. The network node notifies the upper-layer network node to determine the subframe information of the same subframe in the neighboring cell according to the measurement result, so that when the uplink and downlink traffic proportion requirements of the cell are dynamically changed, the subframe information of the neighboring cell can be learned, and the system performance is improved; Further, a basis is provided for avoiding cross-slot interference between cells. BRIEF DESCRIPTION OF DRAWINGS FIG. 1A is a schematic diagram of a frame structure of a TD-LTE system;

FIG. 1B is a schematic diagram of cross-slot interference when using the same TDD carrier; FIG.

Figure 1C is a schematic diagram of cross-slot interference when using adjacent TDD carriers;

2 is a schematic structural diagram of a method for determining subframe information according to an embodiment of the present invention;

3 is a schematic structural diagram of an apparatus for determining subframe information according to an embodiment of the present invention;

4 is a schematic structural diagram of a system for determining subframe information according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of measuring a neighboring cell signal based on a subframe set according to an embodiment of the present invention. The embodiment of the present invention measures the signal of the neighboring cell network side device in each subframe in the subframe set, and obtains the measurement result, and obtains the subframe information of the same subframe in the neighboring cell. When the uplink and downlink traffic ratio requirements of the cell are dynamically changed, the subframe information of the neighboring cell can be known, thereby improving system performance.

The embodiments of the present invention can be applied to a TDD system (such as a TD-LTE system), and can also be applied to other systems that need to dynamically adjust uplink and downlink configurations of a subframe, such as a TD-SCDMA system and its subsequent evolution system, WiMAX (Worldwide Interoperability). For Microwave Access, 4 wave access global interoperability) systems and their subsequent evolution systems.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

As shown in FIG. 2, the method for determining subframe information in the embodiment of the present invention includes the following steps:

Step 201: Perform measurement on a signal of a neighboring cell network side device in each subframe in the subframe set, and determine a measurement result, where the subframe in the subframe set is a sub-frame of the radio frame configured in the local cell. Frame type determined, The subframe type of the subframe in the radio frame includes a variable subframe, and the variable subframe is a subframe with a variable transmission direction (that is, the transmission direction can be dynamically configured as needed, for example, the current period is the uplink transmission direction, and the current period is It is possible that the cycle will become the downstream transmission direction).

Step 202: Determine subframe information of the same subframe in the neighboring cell according to the measurement result, or report the measurement result to the upper-layer network node, and notify the upper-layer network node to determine the subframe information of the same subframe in the neighboring cell.

For example, the subframe set includes a subframe 4, and the subframe information of the subframe 4 in the neighboring cell is determined according to the measurement result measured by the subframe 4.

The subframe type in the radio frame may have a fixed subframe (i.e., a subframe in which the transmission direction does not change) in addition to the variable subframe.

Embodiments of the present invention are applicable as long as there are variable subframes in the radio frame (including all subframes being variable subframes or partial subframes being variable subframes).

Preferably, before step 201, a subframe set may be divided for each subframe.

Specifically, the subframe type in the radio frame configured in the local cell is used to divide the subframe set for each subframe in each period; or the received subframe collection manner from the upper layer is used in each period. Each sub-frame divides the set of sub-frames.

Preferably, if the subframe type in the radio frame configured in the local cell is used to divide the subframe set for each subframe in each period, the variable subframes with the same modulus value may be allocated in each period. In a set of subframes;

The assigned modulus value is determined according to the formula 1:

X=N mod M formula one;

X is the assigned modulus value, N is the subframe number, and M is the period duration.

Take a radio half frame (5ms) cycle as an example:

The subframes in which the neighboring area is fixed in direction are 0, 1, 2, 5, 6, and 7 (that is, the subframe number of the subframe number N mod 5 =0, 1, 2); the neighboring area may change its configuration direction. The frame is 3, 4, 8, 9 (ie, the subframe number N mod 5 = 3, 4 subframes).

According to the formula 1, two subframe sets can be divided in each wireless field, that is, the set 1 is a subframe number of the subframe number N mod 5 = 3 (including the subframes 3 and 8); and the set 2 is the subframe number. N mod 5 = 4 subframes (including subframes 4 and 9).

The subframes in which the neighboring area configuration direction is fixed are 0, 1, 5, and 6 (that is, the subframe number of the subframe number N mod 5 =0, 1); the subframe in which the neighboring area configuration direction may change is 2, 3, 4, 7, 8, 9 (ie, subframe number N mod 5 = 2, 3, 4 subframes).

According to the formula 1, the three subframe sets can be divided in each wireless field, that is, the set 1 is the subframe number of the subframe number N mod 5 = 2 (including the subframes 2 and 7); the set 2 is the subframe number N. A subframe of mod 5 = 3 (including subframes 3 and 8); and a set 3 is a subframe of subframe number N mod 5 = 4 (including subframes 4 and 9).

Of course, the above formula is not only applicable to the case where the cycle duration is 5 ms, and other cases are also applicable, such as the case where the cycle duration is an integer multiple of the radio frame. If the period duration is an integer multiple of the radio frame, except that Equation 1 is used, a preferred way is to use each variable subframe in each period as a set of subframes.

Take a radio frame (10ms) as a cycle for example:

The subframes in which the neighboring area is fixed in direction are 0, 1, 2, 5, and 6; the subframes in which the neighboring area configuration direction may change are 3, 4, 7, 8, and 9.

The subframe set may be divided according to the number of subframes in which the neighboring cell configuration direction may change, without determining the allocation modulus value of each subframe. Divide 5 subframe sets within each radio frame:

Set 1 is a subframe with a subframe number of 3 in each radio frame;

Set 2 is a subframe with a subframe number of 4 in each radio frame;

Set 3 is a subframe with a subframe number of 7 in each radio frame;

Set 4 is a subframe with a subframe number of 8 in each radio frame;

Set 5 is a subframe with a subframe number of 9 in each radio frame.

If the sub-frame set division mode is received from the upper layer, and the sub-frame set is divided into each sub-frame in each period, the high-level sub-frame set division manner may be the same as the above sub-frame set division manner, or Other allocation methods are used, but the subframe type determination of the subframe in the radio frame configured in the local cell is required. For example, the first Z (Z is a positive integer) variable subframes are divided into one subframe set in one cycle, and the remaining variable subframes are divided into another subframe set; the odd subframes may also be divided into one subframe set. , divides even subframes into another subset of subframes. Specifically, the sub-frame set division manner may be determined by the upper layer and notified to the network side device according to the requirement. The specific division status may be directly notified by the upper layer to the network side device, for example, which variable sub-frames are divided into which subframe sets.

Preferably, in step 201, RSRP (reference) can be used when measuring signals of the neighboring cell network side device.

Signal Received Power (Measurement Signal Received Power) is used to measure CRS (Cell-specific Reference Signals) of neighboring cell network side devices in each subframe in the subframe set.

Preferably, before performing the measurement, whether the neighboring cell network side device and the local cell use the same carrier are used, and if yes, the current carrier is measured on the current cell; if not, the jump to the corresponding neighbor On the current carrier of the cell, measurements are performed on the current carrier of the neighboring cell.

Preferably, before performing measurement, time synchronization may be performed with the neighboring cell, and cell ID information of the neighboring cell is obtained.

Specifically, if the measurement process is completed when a network side device is powered on, for example, a network side device sets its own subframe configuration to DSUUU DSUUU when booting (where D represents downlink, S represents special, U represents uplink), and then If the measurement of each neighboring cell signal is performed on the corresponding subframe set or the subframe set group, it is considered that a network side device has established time synchronization with each neighboring cell, and the Cell ID information of each neighboring cell has been known;

If the measurement process is in an uplink subframe of a cell that has already been established on a network side device or MBSFN (Multimedia

Broadcast Multicast Service Single Frequency Network, Multimedia Broadcast Multicast Service Single Frequency Network) Subframe In the data area, it is considered that one base station is keeping time synchronization with each neighboring cell, and the Cell ID information of each neighboring cell has been known.

Correspondingly, according to the acquired Cell ID information of the neighboring cell, the signal of the neighboring cell network side device is measured in each subframe in the subframe set.

In order to improve the reliability of the measurement result, one or more subframe sets may be grouped into a subframe set according to different radio frame division periods, and then multiple subframe sets on one subframe set are correspondingly measured and measured. The result is smoothed for decision.

Specifically, in step 201, after measuring the signal of the neighboring cell network side device in each subframe in each subframe set and determining the measurement result, the measurement determined for each subframe set belonging to the same subframe set group is determined. The result is smoothed to obtain a smoothed measurement result;

Correspondingly, in step 202, the smoothing processed measurement result determines the subframe information of the same subframe in the neighboring cell; or the smoothed measurement result is sent to the upper network node, and the upper network node is notified to be smoothed. The processed measurement result determines subframe information of the same subframe in the neighboring cell.

Preferably, when each subframe set is divided into a subframe set group, the subframe set containing the same subframe in multiple periods may be used as one subframe set group; or the received subframe set group from the upper layer is received. The division mode divides the subframe set into a subframe set group.

If a subframe set containing the same subframe in a plurality of periods is used as a subframe set group, how many cycles are divided into one subframe set group may be specified in the protocol or determined by the upper layer as needed.

For example, if the partitioning period is 5 ms, then Y (Y is a positive integer greater than 1, which can be determined based on protocol agreement or network side configuration). In each wireless field, the subframe number corresponding to each subframe set is N mod 5 The subframes that obtain the same assigned modulus value X constitute one subframe set group. For example, if there are 2 subframe sets (N mod 5= 3 and N mod 5 = 4 subframes) in each wireless field, JLM=4, then 4 mod 5 = 3 in 4 consecutive wireless fields. Sub-frames constitute a sub-frame set group 1; four sub-frames of N mod 5 = 4 in the same consecutive four radio fields constitute a sub-frame set group 2;

For example, if the partitioning period is 10 ms, then L (L is a positive integer greater than 1, which can be determined based on protocol agreement or network side configuration), and subframes with the same subframe number N corresponding to each subframe set in each radio frame. Form a sub-frame collection group. For example, if there are 5 subframe sets (subframes numbered 3, 4, 7, 8, 9 respectively) in each radio frame, and L=4, the subframes in consecutive 4 radio frames are numbered 3 4 subframes constitute a subframe set group 1; 4 subframes with subframe number 4 in the same consecutive 4 radio frames constitute a subframe set group 2, and so on form 5 subframe set groups, each group contains 4 sub-groups frame.

In a specific implementation, each subframe set may be divided into a subframe set group immediately after determining each subframe set, or each subframe set may be divided into a subframe set group immediately after determining the measurement result of each subframe set.

If the sub-frame set is divided into the sub-frame set group, the sub-frame set group division manner determined by the upper layer may be the same as the above-mentioned sub-frame set group division manner, or may be Is other The way of division. For example, the pre-P (P is a positive integer) sub-frame set is divided into one sub-frame set group in a certain period of time, and the remaining sub-frame sets are divided into another sub-frame set group; the specific sub-frames can be directly notified to the network side by the upper layer. Devices, such as which subframe sets are divided into which subframe set groups.

The upper layer here can notify the network side device of the division manner of the subframe set group by using the display signaling manner.

In step 202, the subframe information of the same subframe in the neighboring cell is determined according to the measurement result, or the measurement result is sent to the upper layer network node, and the same subframe in the neighboring cell is determined by the measurement result of the upper layer network node. The subframe information can be specified in the protocol as needed, and the higher layer can also notify the network side device of which method is used.

According to the measurement result, the subframe information of the same subframe in the neighboring cell is determined (including the measurement result of the upper layer network node to determine the subframe information of the same subframe in the neighboring cell), and the measurement result and the set threshold value may be determined. Comparing, determining subframe information of the same subframe in the neighboring cell according to the comparison result.

One or more threshold values may be set as needed, and the subframe information includes but is not limited to one or more of the following information:

Whether the sub-frame transmission direction and the subframe are interfered.

The number of threshold values and which subframe information is determined based on the comparison result can be determined by specific implementation and experience. For example, only one threshold is set, and then the measurement result is compared with the set threshold. If it is greater than the threshold, it is confirmed that the same subframe in the neighboring cell generates cross-interference or neighboring cell network side of the local cell. The device transmits a downlink signal in the same subframe.

For example, if two threshold values 1 and 2 are set, and the threshold value 1 is less than or equal to the threshold value 2, the measurement result is compared with the threshold value 1. If the measurement result is less than the threshold value 1, the neighboring cell is confirmed. The network side device does not transmit the downlink signal in the subframe, or does not generate any cross interference to the local cell even if the downlink signal is transmitted. If the measurement result is greater than the threshold value 2, it is confirmed that the same subframe in the neighboring cell generates a crossover for the local cell. The network side device of the neighboring cell or the neighboring cell transmits the downlink signal in the same subframe; if the measurement result is between the threshold value 1 and the threshold value 2, in order to better avoid the interference, the measurement result may be greater than the threshold value 2 The processing mode is operated; or in order to make better use of the subframe resources, the operation may be performed according to the processing method in which the measurement result is less than the threshold value 1.

If more thresholds are set, the specific comparison results can be set according to the implementation and experience.

The execution body of the method in the embodiment of the present invention is a network side device. The network side device may be a station (such as a macro base station, a Pico NodeB, a home base station, etc.), a relay (RN) device, or other network side devices.

Based on the same inventive concept, an apparatus and system for determining subframe information are further provided in the embodiment of the present invention. Since the principle of solving the problem between the device and the system is similar to the method for determining the subframe information, the implementation of the device and the system may refer to the method. The implementation, the repetition will not be repeated.

As shown in FIG. 3, the apparatus for determining subframe information in the embodiment of the present invention includes: a measurement module 300 and a processing module 310. The measuring module 300 is configured to measure a signal of a neighboring cell network side device in each subframe in the subframe set, The measurement result is determined, where the subframe in the subframe set is determined by the subframe type in the radio frame configured by the local cell, and the subframe type in the radio frame includes a variable subframe, and the variable subframe It is a sub-frame with a variable transmission direction.

The processing module 310 is configured to determine subframe information of the same subframe in the neighboring cell according to the measurement result determined by the measurement module 300, or send the measurement result to the upper layer network node, and notify the upper layer network node to determine the same result in the neighboring cell. Subframe information of a subframe.

Preferably, the measurement module 300 is further configured to:

Before determining the measurement result, according to the subframe type in the radio frame configured by the cell, the subframe set is divided for each subframe in each period; or

Before determining the measurement result, the subframe set is divided for each subframe in each period according to the received subframe division manner from the upper layer.

Preferably, the measurement module 300 is specifically configured to:

Dividing a variable subframe having the same modulus value in each period into one subframe set;

The assigned modulus is determined according to the following formula:

X=N mod M;

Where X is the assigned modulus value, N is the subframe number, and M is the period duration.

Preferably, the measurement module 300 is specifically configured to:

When the period length is equal to an integral multiple of the duration of one radio frame, each variable sub-frame in each period is taken as a sub-frame set.

Preferably, the measurement module 300 is specifically configured to:

Determining that the neighboring cell uses the same carrier as the local cell, and measuring the signal of the neighboring cell network side device in each subframe in the subframe set on the current carrier of the current cell;

The neighboring cell is determined to use a different carrier from the local cell, and the signal of the neighboring cell network side device is measured in each subframe in the subframe set on the current carrier of the neighboring cell.

Preferably, the measurement module 300 is further configured to:

After determining the measurement result, the measurement result determines the subframe information of the same subframe in the neighboring cell or the measurement result is

Before smoothing to the upper network node, smoothing the measurement result determined by each subframe set in the subframe set group, and obtaining the smoothed measurement result;

The processing module 310 is specifically configured to:

According to the smoothed processing result, the subframe information of the same subframe in the neighboring cell is determined; or the smoothed measurement result is sent to the upper network node, and the upper network node is notified to the smoothed processing result. Determining subframe information of the same subframe in the neighboring cell.

Preferably, the measurement module is further configured to:

Before performing the smoothing process, the subframe set containing the same subframe in multiple cycles is used as one subframe set group; or After the measurement result is determined, before the smoothing process, the subframe set is divided into the subframe set according to the received subframe group group division manner from the upper layer.

Preferably, the measurement module 300 is specifically configured to:

The reference signal received power RSRP measurement mode is used to measure the cell-specific pilot signal CRS of the neighboring cell network side device in each subframe in the subframe set.

Preferably, the measurement module 300 is further configured to:

Before measuring the signal of the neighboring cell network side device in each subframe in the subframe set, time synchronization with the neighboring cell, and acquiring cell identity information of the neighboring cell.

Preferably, the measurement module 300 is specifically configured to:

The cell identification information of the neighboring cell obtained by the neighboring cell is measured in the subframe of the neighboring cell network side device in each subframe in the subframe set.

Preferably, the processing module 310 is specifically configured to:

The measurement result is compared with the set threshold value, and the subframe information of the same subframe in the neighboring cell is determined according to the comparison result.

As shown in FIG. 4, the system for determining subframe information in the embodiment of the present invention includes: a network side device 10 and an upper layer network node device 20.

The network side device 10 is configured to measure a signal of the neighboring cell network side device in each subframe in the subframe set, determine a measurement result, and send the measurement result to the upper layer network node, where the child in the subframe set The frame is determined by the subframe type in the radio frame configured by the local cell, and the subframe type in the radio frame includes a variable subframe, and the variable subframe is a subframe with a variable transmission direction.

The upper layer network node device 20 is configured to determine subframe information of the same subframe in the neighboring cell by using the measurement result.

The network side device in the embodiment of the present invention may be a base station (such as a macro base station, a micro base station, a home base station, etc.), or may be a relay device, or may be another network side device.

The present invention is described below by taking a threshold value as an example. Setting a plurality of threshold values is similar to setting a threshold value, and details are not described herein again.

FIG. 5 is a schematic diagram of measuring a signal of a neighboring cell network side device based on a subframe set according to an embodiment of the present invention, where a macro base station of a macro cell and a femto base station 1 of a femto cell 1 are powered on in the geographical area. The TDD subframe used by the macro base station is configured as DSUUD DSUUD, and the TDD subframe used by the femto base station 1 is configured as DSUDD DSUDD. At this time, the femto base station 2 of the femto cell 2 is powered on, and the TDD subframe of the femto cell 2 is configured as a DSUUU DSUUU, and is measured in the three subframe sets of each radio field, that is,

Subframe set 1 is a subframe with subframe number N mod 5 = 2;

Subframe set 2 is a sub-frame number N mod 5 = 3;

The subframe set 3 is a subframe of subframe number N mod 5 = 4. The threshold value set in this embodiment is a preset threshold value 1. When the RSRP value of the macro cell and the femto cell 1 is lower than the preset threshold value 1 in the subframe set 1, the macro base station and the MN are determined. The pico base station 1 does not transmit the downlink signal in the subframe corresponding to the subframe set 1; in the subframe set 2, the RSRP value of the macro cell is measured to be lower than the preset threshold 1, and the RSRP value of the femtocell 1 is higher than The preset threshold value 1 determines that the macro base station does not send the downlink signal in the subframe corresponding to the subframe set 2, and the femto base station 1 transmits the downlink signal in the subframe corresponding to the subframe set 2; and so on. Thereby, the subframe information of the macro cell and the first cell 1 is obtained.

For example, if the measurement result of the transmission signal of a neighboring cell in a subframe set or a subframe set group is lower than the preset threshold 1, the neighboring cell may be considered not to transmit a downlink signal in the subframe; or even if a downlink signal is transmitted. However, no cross interference is generated for the cell, and it is also considered that the neighboring cell does not transmit the downlink signal.

The embodiment of the present invention determines the subframe information of the same subframe in the neighboring cell or the measurement result to the upper layer network according to the measurement result of measuring the signal of the neighboring cell network side device in each subframe in the subframe set. The node notifies the upper-layer network node to determine the subframe information of the same subframe in the neighboring cell according to the measurement result, so that when the uplink and downlink traffic proportion requirements of the cell are dynamically changed, the subframe information of the neighboring cell can be learned, and the system performance is improved; , to provide a basis for avoiding cross-slot interference between cells.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

A method for determining subframe information, the method comprising:

2. The method according to claim 1, wherein the determining the measurement result further comprises: dividing each sub-frame in each period according to the subframe type of the subframe in the radio frame configured by the local cell. Frame set; or

According to the received subframe group division manner from the upper layer, the subframe set is divided for each subframe in each period.

The method according to claim 2, wherein the dividing the subframe set for each subframe in each period includes:

The distribution modulus is determined according to the following formula:

X=N mod M;

The method according to claim 2, wherein the period duration of each period is equal to an integer multiple of a radio frame duration;

Then, the sub-frame set is divided into each sub-frame in each period, and specifically includes:

Each variable subframe in each cycle is treated as a set of subframes.

The method according to claim 1, wherein the measuring the signal of the neighboring cell network side device in each subframe in the subframe set includes:

The method according to claim 1, wherein after determining the measurement result, determining subframe information of the same subframe in the neighboring cell or before transmitting the measurement result to the upper layer network node, the method further includes:

The measurement result determined by each subframe set in the subframe set group is smoothed to obtain a measurement result. The determining the subframe information of the same subframe in the neighboring cell includes:

Determining the subframe information of the same subframe in the neighboring cell according to the smoothed measurement result; The step of giving the measurement result to the upper layer network node includes:

The smoothed measurement result is sent to the upper layer network node, and the upper layer network node is notified to the smoothed processing result to determine the subframe information of the same subframe in the neighboring cell.

7. The method according to claim 6, wherein before performing the smoothing process, the method further comprises:

A set of subframes having the same subframe in a plurality of periods as a subframe set group; or

According to the received subframe group group division manner from the upper layer, the subframe group is divided into a subframe group.

The method according to any one of claims 1 to 7, wherein the measuring the signal of the neighboring cell network side device in each subframe in the subframe set includes:

The method according to any one of claims 1 to 7, wherein before the measuring of the signal of the neighboring cell network side device in each subframe in the subframe set, the method further includes:

And performing time synchronization with the neighboring cell, and acquiring cell identity information of the neighboring cell.

The method according to claim 9, wherein the measuring the signal of the neighboring cell network side device in each subframe in the subframe set includes:

The signal of the neighboring cell network side device is measured in each subframe in the subframe set according to the obtained cell identity information of the neighboring cell.

The method according to any one of claims 1 to 7, wherein the determining, according to the measurement result, the subframe information of the same subframe in the neighboring cell comprises:

12. A device for determining subframe information, the device comprising:

13. The device according to claim 12, wherein the measuring module is further configured to:

Before determining the measurement result, according to the subframe type of the subframe in the radio frame configured by the cell, the subframe set is divided for each subframe in each period; or

The device according to claim 13, wherein the measuring module is specifically configured to: Dividing a variable subframe having the same modulus value in each period into one subframe set;

The distribution modulus is determined according to the following formula:

X=N mod M;

The device according to claim 13, wherein the measuring module is specifically configured to:

When the period length of each period is equal to an integral multiple of the duration of one radio frame, each variable sub-frame in each period is taken as a sub-frame set.

The device according to claim 12, wherein the measuring module is specifically configured to:

The device of claim 12, wherein the measuring module is further configured to:

After the measurement result is determined, the subframe information of the same subframe in the neighboring cell is determined or the measurement result is sent to the upper layer network node, and the measurement result determined by each subframe set in the subframe set group is smoothed to obtain a measurement result. The processing module is specifically configured to:

According to the smoothed measurement result, the subframe information of the same subframe in the neighboring cell is determined; or the smoothed measurement result is sent to the upper network node, and the upper network node is notified to perform the smoothing measurement. As a result, the subframe information of the same subframe in the neighboring cell is determined.

The device of claim 17, wherein the measurement module is further configured to:

Before performing the smoothing process, the subframe set containing the same subframe in multiple periods is used as one subframe set group; or after determining the measurement result, before performing the smoothing process, according to the received subframe group grouping manner from the upper layer, The subframe set is divided into a subframe set group.

The device according to any one of claims 12 to 18, wherein the measuring module is specifically configured to: measure a neighboring cell in each subframe in the subframe set by using a reference signal received power RSRP measurement mode The cell-specific pilot signal CRS of the network side device.

The device according to any one of claims 12 to 18, wherein the measuring module is further configured to: before measuring a signal of a neighboring cell network side device in each subframe in the subframe set, The neighboring cell performs time synchronization, and acquires cell identity information of the neighboring cell.

The device according to claim 20, wherein the measuring module is specifically configured to:

The device according to any one of claims 12 to 18, wherein the processing module is specifically configured to: The measurement result is compared with the set threshold value, and the subframe information of the same subframe in the neighboring cell is determined according to the comparison result.

23. A system for determining subframe information, the system comprising:

a network side device, configured to measure a signal of a neighboring cell network side device in each subframe in the subframe set, determine a measurement result, and send the measurement result to the upper layer network node, where the subframe in the subframe set The subframe type of the subframe in the radio frame is determined by the subframe type of the subframe in the radio frame, where the subframe type of the subframe includes a variable subframe, and the variable subframe is a subframe with a variable transmission direction. ;