CN103797886A - A method and device for determining a receiving antenna - Google Patents

Abstract

The invention provides a method and a device for determining reception antennas, relating to the wireless communication field. The invention enhances the reliability of the uplink reception of the user device and reduces the system interference. The method comprising: detecting signal quality of the random access preamble signal received from the antenna to the second cell of the first cell of the user equipment transmitting the random access channel, the second cell to the first cell neighboring cell; said cell if said second antenna signal to the random access preamble signal quality exceeds the threshold value, determining the uplink user equipment receiving antenna comprises an antenna of the second cell; will have said first cell of a wireless signal received by the antenna and the user equipment sends to the second cell radio signal received by the antenna of the user apparatus transmits the reception process for joint

Description

A method and device for determining a receiving antenna

technical field

The present invention relates to the field of wireless communication, in particular to a method and device for determining a receiving antenna.

Background technique

The idle mode (IDLE Mode) of the user equipment is an important state of the user equipment. In the idle mode, there is no radio resource control connection (RRC, radio resource control) between the user equipment and the network, and the network does not know the cell location of the user equipment. . When the user equipment is turned on or roaming, its first task is to find and contact the network.

When the user equipment accesses the system in the IDLE state, it always tries to stay in a cell where the uplink and downlink can communicate successfully. In the prior art, when the user equipment transfers from the non-dedicated connection state (idle state or public channel state) to the dedicated connection state, the base station controller or the base station needs to wait for the user equipment downlink measurement or the base station uplink measurement before identifying the uplink of the user equipment Combined receiving antenna. For the user equipment, the user equipment in the idle state performs downlink measurement, and selects a cell with a strong downlink signal to camp, and initiates a link establishment request in the camped cell. After the connection is established, the uplink receiving antenna of the user equipment is activated by the user equipment. The cells in the active set of the user equipment are determined according to the downlink measurement results performed by the user equipment. For the network side, in the coordinated multiple points (CoMP, coordinated multiple points) transmission technology, the user equipment needs to periodically send a channel sounding reference signal (SRS, sounding reference signal), and the base station receiving the channel sounding reference signal will The wireless channel quality (CQI, channel quality indicator) of the signal is compared with a threshold. If the wireless channel quality of the base station receiving the SRS is greater than the threshold, the base station controller or the base station will use the antenna of the base station as one of the uplink receiving antennas of the user equipment one.

However, in the prior art, the base station controller or the base station can determine the uplink receiving antenna of the user equipment only after the user equipment sends an additional channel sounding reference signal, and the user equipment consumes extra power; in the following scenarios, for example, macro-differential In scenarios such as network construction scenarios, scenarios where the reciprocity of the uplink and downlink propagation models is not strong, and uplink load imbalance between cells, for the same user equipment, the uplink and downlink are unbalanced, and the downlink quality cannot be accurately determined The uplink receives the target antenna, causing strong uplink interference.

Contents of the invention

Embodiments of the present invention provide a method and device for determining a receiving antenna, which solves the problem that the base station or the base station controller can identify the user equipment only after waiting for subsequent downlink or uplink measurements when the user equipment transitions from the non-dedicated connection state to the connection state The problem of the uplink joint receiving antenna and the problem that the user equipment needs to send an additional channel sounding reference signal to the predetermined CoMP base station, the base station or the base station controller can determine the problem of the uplink receiving antenna, which can enhance the uplink receiving reliability of the user equipment and reduce the interference of the system .

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a method for determining a receiving antenna, including:

Detecting the signal quality of the random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, where the second cell is a neighboring cell of the first cell;

If the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value, determine that the uplink receiving antenna of the user equipment includes the antenna of the second cell;

performing joint receiving processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell.

In a first possible implementation manner of the first aspect, after determining that the uplink receiving antenna of the user equipment includes the antenna of the second cell, the user equipment received by the antenna of the first cell Before performing joint reception processing on the radio signal sent by the device and the radio signal sent by the user equipment received by the antenna of the second cell, the method further includes:

Sending an acknowledgment message to the user equipment, where the acknowledgment message is used to indicate that the random access preamble has been successfully detected.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the confirmation message is sent via an antenna of the first cell and/or an antenna of the second cell.

In a third possible implementation manner of the first aspect, the combining the radio signal sent by the user equipment received by the antenna of the first cell with the radio signal received by the antenna of the second cell The transmitted wireless signal is jointly received and processed, including:

receiving a radio signal sent by the user equipment through an antenna of the first cell;

receiving a wireless signal sent by the user equipment through an antenna of the second cell;

performing combined demodulation on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the wireless signal sent by the user equipment includes the wireless signal sent by the user equipment during the random access process and /or after the random access procedure ends, the user equipment enters a dedicated connection state, and sends a wireless signal on a dedicated uplink channel.

With reference to any one of the foregoing first aspect or the first possible implementation manner to the fourth possible implementation manner of the first aspect, the signal quality of the random access preamble includes chip energy intensity, symbol At least one of energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

In a second aspect, an embodiment of the present invention provides a base station, including:

A detection unit, configured to detect the signal quality of a random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, the second cell being the first cell the neighboring district;

A determining unit, configured to determine that the uplink receiving antenna of the user equipment includes an antenna of the second cell if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value;

A processing unit, configured to perform joint reception processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell.

In a first possible implementation manner of the second aspect, the base station includes a sending unit;

The sending unit is configured to, after the determining unit determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell, the processing unit receives the radio data sent by the user equipment received by the antenna of the first cell before performing joint reception processing on the signal and the radio signal sent by the user equipment received by the antenna of the second cell, sending an acknowledgment message to the user equipment, where the acknowledgment message is used to indicate that the random access preamble signal has was successfully detected.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the confirmation message is sent via an antenna of the first cell and/or an antenna of the second cell.

In a third possible implementation manner of the second aspect, the base station further includes a receiving unit;

The receiving unit is configured to receive, through the antenna of the first cell, the wireless signal sent by the user equipment after the sending unit sends a confirmation message to the user equipment, and is used to transmit the wireless signal sent by the sending unit to the user equipment. After the user equipment sends the confirmation message, the radio signal sent by the user equipment is received through the antenna of the second cell.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the wireless signal sent by the user equipment includes a wireless signal sent by the user equipment during a random access process and/or Or after the random access procedure ends, the user equipment enters a dedicated connection state, and sends wireless signals on a dedicated uplink channel.

In combination with the aforementioned second aspect or any one of the first to fourth possible implementations of the second aspect, in the fifth possible implementation of the second aspect, the random The signal quality of the access preamble includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

In a third aspect, an embodiment of the present invention further provides a base station, including:

a processor, configured to detect the signal quality of a random access preamble signal sent by a user equipment on a random access channel of a first cell received from an antenna of a second cell, the second cell being the first cell neighbor cell, and used for determining that the uplink receiving antenna of the user equipment includes the second cell if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value An antenna, and is further configured to perform joint reception processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell.

In a first possible implementation manner of the third aspect, the base station includes a transmitter;

The transmitter is configured to transmit the radio signal sent by the user equipment received by the antenna of the first cell after the processor determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell Before performing joint reception processing with the radio signal sent by the user equipment received by the antenna of the second cell, send an acknowledgment message to the user equipment, where the acknowledgment message is used to indicate to the user equipment that the random access The preamble has been successfully detected.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the confirmation message is sent via an antenna of the first cell and/or an antenna of the second cell.

In a third possible implementation manner of the third aspect, the base station further includes a receiver;

The receiver is configured to receive, through the antenna of the first cell, the wireless signal sent by the user equipment after the transmitter sends an acknowledgment message to the user equipment, and is configured to receive the wireless signal sent by the transmitter to the user equipment After the user equipment sends the confirmation message, the radio signal sent by the user equipment is received through the antenna of the second cell.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the wireless signal sent by the user equipment includes the wireless signal sent by the user equipment during the random access process and /or after the random access procedure ends, the user equipment enters a dedicated connection state, and sends a wireless signal on a dedicated uplink channel.

In combination with the aforementioned third aspect or any of the first to fourth possible implementations of the third aspect, in the fifth possible implementation of the third aspect, the random The signal quality of the access preamble includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

A method and device for determining a receiving antenna provided by an embodiment of the present invention, by detecting the signal quality of a random access preamble signal received from an antenna of a second cell and sent by a user equipment on a random access channel of the first cell , wherein the second cell is a neighboring cell of the first cell, and then, if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value, it is determined that the uplink receiving antenna of the user equipment includes the second cell Finally, joint reception processing is performed on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell. Through this scheme, when the user equipment transitions from the non-dedicated connection state to the connected state, the base station can accurately identify the user equipment without waiting for subsequent downlink or uplink measurements, and without the user equipment consuming extra power to send channel sounding reference signals. The uplink joint receiving antenna enables the user equipment to obtain uplink joint reception when it initially enters the connected state, which enhances the uplink receiving reliability of the user equipment and reduces system interference at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a first schematic flow diagram of a method for determining a receiving antenna according to an embodiment of the present invention;

FIG. 2 is a second schematic flow diagram of a method for determining a receiving antenna according to an embodiment of the present invention;

FIG. 3 is a first structural schematic diagram of a base station according to an embodiment of the present invention;

FIG. 4 is a second schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 5 is a third structural schematic diagram of a base station according to an embodiment of the present invention;

FIG. 6 is a fourth structural schematic diagram of a base station according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The various technologies described in this article can be used in various communication systems based on random access preamble competition for access resources, such as global system for mobile communications (GSM, global system for mobile communications), code division multiple access (CDMA, code division multiple access ) system, time division multiple access (TDMA, time division multiple access) system, wideband code division multiple access (WCDMA, wideband code division multiple access wireless), frequency division multiple access (FDMA, frequency division multiple addressing) system, orthogonal frequency division Multiple access (OFDMA, orthogonal frequency-division multiple access) system, single carrier FDMA (SC-FDMA) system, general packet radio service (GPRS, general packet radio service) system, long-term evolution (LTE, long term evolution) system, and others such communication systems.

The user equipment may be a wireless terminal or a wired terminal. The wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (for example, RAN, radio access network), and the wireless terminal can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a mobile terminal The computers, which may be, for example, portable, pocket, handheld, built-in or vehicle-mounted mobile devices, exchange speech and/or data with the radio access network. For example, personal communication service (PCS, personal communication service) telephone, cordless telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL, wireless local loop) station, personal digital assistant (PDA, personal digital assistant) and other equipment . A wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal (remote terminal), access terminal, user terminal, user agent, user device, or user equipment.

Idle mode is an important state of user equipment. In idle mode, there is no radio resource control connection (RRC, radio resource control) between the user equipment and the network, and the network does not know the location of the cell where the user equipment is located. When the user equipment is turned on or roaming, its first task is to find the network and get in touch with the network. It always determines the residential cell through the signal strength algorithm. In the idle mode, the user equipment continuously measures the broadcast control channels of the camping cell and the adjacent cell, so as to select a suitable cell for logging in.

The public channel state is another important state of the user equipment. In the public channel state, an RRC connection is established between the user equipment and the network, and the user equipment is allocated a public physical channel (DPCH, dedicated physical channel). In addition, the user equipment The device may also be assigned a physical uplink shared channel (PUSCH, physical uplink shared channel) and/or a physical downlink shared channel (PDSCH, physical downlink shared channel), and the user equipment sends data to the network on the relevant shared channel.

Random access is one of the most basic functions of the cellular system, which makes it possible for the terminal to establish a connection with the network. The user equipment can be scheduled by the system to perform uplink transmission only after it is synchronized with the uplink of the system through a random access process. The random access process is a channel application process. When the user equipment in the idle mode or in the public channel state needs to establish a communication connection with the network, the user equipment sends a message to the network on the random access channel.

CoMP (coordinated multipoint transmission, coordinated multiple points), a communication term, is one of the important technologies of LTE-A (long term evolution-advanced). CoMP transmission refers to multiple geographically separated transmission points that cooperate to participate in data (PDSCH) transmission for a terminal or jointly receive data (PUSCH) sent by a terminal. Multiple transmission points participating in cooperation usually refer to base stations in different cells . CoMP technology puts edge user equipment on the same frequency of several base stations, and several base stations serve the user equipment at the same time, so as to improve the coverage performance of edge users. The use of CoMP can reduce inter-cell interference, mainly to improve the spectrum efficiency of cell edge users.

Embodiment one

An embodiment of the present invention provides a method for determining a receiving antenna, as shown in FIG. 1 , including:

S101. The base station detects the signal quality of the random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell.

Wherein, the second cell is an adjacent cell of the first cell, and the first cell may be a cell where the user equipment in the idle state resides, or a serving cell for the user equipment in the public channel state.

When the user equipment in the idle mode selects a suitable cell to camp on, or the user equipment in the common channel state is in the serving cell, an initial random access process will be initiated. Random access is a basic function, and the user equipment can perform uplink transmission only after successfully applying for the transmission permission of the uplink random access channel through the random access process.

Specifically, the base station needs to consume baseband resources of the base station itself when detecting the random access preamble signal received from the antenna of the second cell and received by the user equipment on the random access channel of the first cell. The random access preamble signal sent on the random access channel of a cell is uplink synchronized in the first cell and the second cell, that is, to ensure that the antenna of the second cell can receive the signal sent by the user equipment on the random access channel of the first cell. The base station needs to configure its own resources.

Further, the base station configures information such as a scrambling code and a frequency point to ensure that the antenna of the second cell receives the random access preamble signal sent by the user equipment on the random access channel of the first cell.

Specifically, the initial random access process includes the sending of a random access preamble, and the user equipment in the idle state first sends a random access preamble on the random access channel of the cell where it resides, or the user equipment in the common channel state The user equipment sends a random access preamble signal on the uplink random access channel of its serving cell, and the random access preamble signal is detected by the antenna of the camping cell or a neighboring cell of the serving cell.

Further, the base station detects the signal quality of the random access preamble signal received on the antenna of the second cell, where the signal quality includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

It should be noted that the antennas of the first cell and the antennas of the second cell in the embodiment of the present invention are different, and the base station to which the first cell belongs may be the same as or different from the base station to which the second cell belongs. Not limited.

Wherein, if the base stations to which the first cell and the second cell belong are the same base station, the steps in the embodiment of the present invention are completed by the same base station to which the first cell and the second cell belong; if the base station to which the first cell belongs is the same When the base stations to which the second cell belongs are different, it is the master base station that completes the steps in the embodiments of the present invention, and the master base station is a base station that can detect signals received on the antennas of each cell and determine the uplink receiving antenna of the user equipment.

S102. If the signal quality of the random access preamble signal received by the antenna of the second cell exceeds the threshold, the base station determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell.

After the base station detects the random access preamble signal sent by the user equipment on the random access channel of the first cell received by the antenna of the second cell, the antenna of the second cell that successfully receives the random access preamble signal is used as the user equipment's antenna. One of the uplink receiving antennas.

Specifically, the base station records the set of neighboring cells that can receive the random access preamble sent by the user equipment on the random access channel of the first cell, and then determines in the set of cells that the signal quality of the received random access preamble exceeds the threshold The neighbor cell of the limit value, that is, determine the second cell that has successfully received the random access preamble signal, and use the antenna of the second cell whose signal quality of the received random access preamble signal exceeds the threshold value as the uplink of the user equipment One of the receiving antennas.

Wherein, the first cell may be a camping cell of the user equipment in an idle state, or may be a serving cell of the user equipment in a public channel state.

It should be noted that the number of antennas of the second cell receiving the random access preamble whose signal quality exceeds the threshold is at least one, and the number is not limited in the present invention.

For example, the serving cell of a mobile phone has three neighboring cells: A, B, and C. The mobile phone sends a random access preamble signal on the random access channel of its serving cell, and the antennas of the three neighboring cells all receive the random access preamble signal. , wherein, if the quality of the random access preamble signal received by the antenna of cell A and the antenna of cell B exceeds the threshold value, the base station determines that the uplink receiving antenna of the mobile phone includes the antenna of cell A and the antenna of cell B.

S103. The base station performs joint reception processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell.

Wherein, the first cell may be a camping cell of the user equipment in an idle state, or may be a serving cell of the user equipment in a public channel state.

Joint reception technology refers to the signal sent by the same transmitting source is received on multiple antennas. In the process of demodulating and decoding the received signal, multiple antenna signals are combined to process and obtain the correct decoding result of the signal sent by the transmitting end. . Compared with single-antenna reception, joint reception has achieved uplink reception diversity gain. Typical multi-antenna joint reception technologies such as multi-antenna signal RAKE (multipath diversity reception technology) combination, LLR (log-likelihood ratio, logarithmic likelihood ratio) flow Merge, or selectively merge decoding results, etc.

After determining that the uplink receiving antennas of the user equipment include the antennas of the second cell, the base station uses the antennas of the first cell where the user equipment is located and the antennas of the second cell as the set of uplink joint receiving antennas of the user equipment.

Specifically, the base station receives the wireless signal sent by the user equipment through the antenna of the first cell where the user equipment is located, and at the same time, receives the wireless signal sent by the user equipment through the antenna of the second cell, and then transmits the wireless signal received by the antenna of the first cell The transmitted wireless signal is demodulated and decoded with the wireless signal received by the antenna of the second cell and transmitted by the user equipment, thereby reducing system interference and power loss.

An embodiment of the present invention provides a method for determining a receiving antenna. The base station detects the signal quality of the random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, wherein , the second cell is a neighboring cell of the first cell, and then, if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value, it is determined that the uplink receiving antenna of the user equipment includes the antenna of the second cell , finally, performing joint receiving processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell. Through this scheme, when the user equipment transitions from the non-dedicated connection state to the connected state, the base station can accurately identify the user equipment without waiting for subsequent downlink or uplink measurements, and without the user equipment consuming extra power to send channel sounding reference signals. The uplink joint receiving antenna enables the user equipment to obtain uplink joint reception when it initially enters the connected state, which enhances the uplink receiving reliability of the user equipment and reduces system interference at the same time.

Embodiment two

An embodiment of the present invention provides a method for determining a receiving antenna, as shown in FIG. 2 , including:

S201. The user equipment sends a preamble signal on a random access channel of the first cell.

Wherein, the first cell may be a camping cell of the user equipment in an idle state, or may be a serving cell of the user equipment in a public channel state.

When the user equipment in the idle mode selects a suitable cell to camp on, or the user equipment in the common channel state is in the serving cell, an initial random access process will be initiated. Random access is a basic function, and the user equipment can be scheduled by the system for uplink transmission only after it is synchronized with the uplink of the system through the random access process.

Random access is one of the most basic functions of the cellular system, which makes it possible for the terminal to establish a connection with the network. The user equipment can be scheduled by the system to perform uplink transmission only after it is synchronized with the uplink of the system through a random access process. The random access process is a channel application process. When the user equipment in idle mode or public channel state needs to establish a communication connection with the network, the user equipment sends a message to the network on the random access channel.

Specifically, after the user equipment in the idle mode selects a suitable cell to camp on, or when the user equipment in the common channel state is in the serving cell, a random access process is initiated. The user equipment sends the random access preamble signal on the random access channel of the cell it is camping on, or the user equipment in the common channel state sends the random access preamble signal on the uplink random access channel of its serving cell.

It should be noted that the antennas of the first cell and the antennas of the second cell in the embodiment of the present invention are different, and the base station to which the first cell belongs may be the same as or different from the base station to which the second cell belongs. Not limited.

Wherein, if the base stations to which the first cell and the second cell belong are the same base station, the steps in the embodiment of the present invention are completed by the same base station to which the first cell and the second cell belong; if the base station to which the first cell belongs is the same When the base stations to which the second cell belongs are different, it is the master base station that completes each step in the embodiment of the present invention, and the master base station is a base station that can detect the signal received on the antenna of each cell and can determine the uplink receiving antenna of the user equipment .

S202. The base station detects the signal quality of the random access preamble signal received from the antenna of the second cell and sent by the user equipment on the random access channel of the first cell.

Wherein, the second cell is an adjacent cell of the first cell.

When the user equipment in the idle mode selects a suitable cell to camp on, or the user equipment in the common channel state is in the serving cell, an initial random access process will be initiated. Random access is a basic function, and the user equipment can perform uplink transmission only after successfully applying for the transmission permission of the uplink random access channel through the random access process.

Specifically, the base station needs to consume baseband resources of the base station itself when detecting the random access preamble signal received from the antenna of the second cell and received by the user equipment on the random access channel of the first cell. The random access preamble signal sent on the random access channel of a cell is uplink synchronized in the first cell and the second cell, that is, to ensure that the antenna of the second cell can receive the signal sent by the user equipment on the random access channel of the first cell. The base station needs to configure its own resources.

Further, the base station configures information such as a scrambling code and a frequency point to ensure that the antenna of the second cell receives the random access preamble signal sent by the user equipment on the random access channel of the first cell.

Specifically, the initial random access process includes the sending of a random access preamble, and the user equipment in the idle state first sends a random access preamble on the random access channel of the cell where it resides, or the user equipment in the common channel state The user equipment sends a random access preamble signal on the uplink random access channel of its serving cell, and the random access preamble signal is detected by the antenna of the camping cell or a neighboring cell of the serving cell.

Further, the base station detects the signal quality of the random access preamble signal received on the antenna of the second cell, where the signal quality includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

S203. If the signal quality of the random access preamble signal received by the antenna of the second cell exceeds the threshold value, the base station determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell.

Wherein, the signal quality of the random access preamble includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

After the base station detects the random access preamble signal sent by the user equipment on the random access channel of the first cell received by the antenna of the second cell, the antenna of the second cell that successfully receives the random access preamble signal is used as the user equipment's antenna. One of the uplink receiving antennas.

Specifically, the base station records the set of neighboring cells that can receive the random access preamble sent by the user equipment on the random access channel of the first cell, and then determines in the set of cells that the signal quality of the received random access preamble exceeds the threshold The neighbor cell of the limit value, that is, determine the second cell that has successfully received the random access preamble signal, and use the antenna of the second cell whose signal quality of the received random access preamble signal exceeds the threshold value as the uplink of the user equipment One of the receiving antennas.

Wherein, the first cell may be a camping cell of the user equipment in an idle state, or may be a serving cell of the user equipment in a public channel state.

It should be noted that the number of antennas of the second cell receiving the random access preamble whose signal quality exceeds the threshold is at least one, and the number is not limited in the present invention.

For example, the serving cell of a mobile phone has three neighboring cells: A, B, and C. The mobile phone sends a random access preamble signal on the random access channel of its serving cell, and the antennas of the three neighboring cells all receive the random access preamble signal. , wherein, if the quality of the random access preamble signal received by the antenna of cell A and the antenna of cell B exceeds the preset threshold value, the base station determines that the uplink receiving antenna of the mobile phone includes the antenna of cell A and the antenna of cell B.

S204. The base station sends a confirmation message to the user equipment through the downlink channel of the first cell.

Wherein, the confirmation message is used to indicate that the random access preamble signal of the user equipment has been successfully detected. The confirmation message is sent through the downlink channel of the first cell via the antenna of the first cell or the antenna of the second cell.

After determining that the signal quality of the random access preamble signal received by the antenna of the second cell exceeds the threshold, that is, after determining that the uplink receiving antenna of the user equipment includes the antenna of the second cell, the base station sends a confirmation message to the user equipment, indicating that the user equipment The device random access preamble has been successfully detected.

Specifically, after determining that the uplink receiving antenna of the user equipment includes the antenna of the second cell, the base station sends an acknowledgment message to the user equipment through the downlink channel of the first cell where the user equipment is located, so that the user equipment knows the random access information sent by itself. The preamble signal has been successfully detected, and then the corresponding next step operation is performed, and the confirmation message is sent through the antenna of the first cell or the antenna of the second cell.

It should be noted that when the base station sends the acknowledgment message, it is not necessary to determine whether the quality of the random access preamble signal received by the antenna of the first cell of the user equipment exceeds a preset threshold value. After the signal quality of the access preamble exceeds the preset threshold, a confirmation message is sent to the user equipment.

S205. The base station receives the wireless signal sent by the user equipment through the antenna of the first cell.

Wherein, the wireless signal sent by the user equipment is a wireless signal sent by the user equipment after receiving the confirmation message.

The wireless signal sent by the user equipment includes the wireless signal sent by the user equipment during the random access process and/or the wireless signal sent on the dedicated uplink channel when the user equipment enters a dedicated connection state after the random access process ends.

After determining the uplink receiving antenna of the user equipment, the base station receives the wireless signal subsequently sent by the user equipment.

Specifically, the wireless signal sent by the user equipment during the random access process and/or after the random access process ends, the user equipment enters the dedicated connection state, and the wireless signal sent on the dedicated uplink channel is received by the first channel where the user equipment is located. Received by the antenna of a cell.

Wherein, the first cell is a cell where the user equipment in an idle state resides, and may also be a serving cell for the user equipment in a dedicated channel state.

S206. The base station receives the wireless signal sent by the user equipment through the antenna of the second cell.

Wherein, the wireless signal sent by the user equipment is a wireless signal sent by the user equipment after receiving the confirmation message.

The wireless signal sent by the user equipment includes the wireless signal sent by the user equipment during the random access process and/or the wireless signal sent on the dedicated uplink channel when the user equipment enters a dedicated connection state after the random access process ends.

After the base station determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell, the radio signal sent by the user equipment can be received by the antenna of the neighboring cell.

Specifically, the wireless signal sent by the user equipment during the random access process and/or after the random access process ends, the user equipment enters the dedicated connection state, and the wireless signal sent on the dedicated uplink channel is received by the antenna of the second cell take over.

Wherein, the first cell is a cell where the user equipment in an idle state resides, and may also be a serving cell for the user equipment in a public channel state.

S207. The base station demodulates the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell, and transmits the radio signal received by the antenna of the first cell and sent by the user equipment The signal is combined with the radio signal received by the antenna of the second cell and sent by the user equipment.

Wherein, the combination processing includes multi-antenna signal multipath diversity reception technology RAKE combination, logarithmic likelihood ratio LLR stream combination or decoding result selective combination.

After determining that the uplink receiving antennas of the user equipment include the antennas of the second cell, the base station uses the antennas of the first cell where the user equipment is located and the antennas of the second cell as the set of uplink joint receiving antennas of the user equipment.

Specifically, the base station receives the wireless signal sent by the user equipment through the antenna of the first cell where the user equipment is located, and at the same time, receives the wireless signal sent by the user equipment through the antenna of the second cell, and then demodulates the user equipment received by the antenna of the first cell. The radio signal sent by the device is combined with the radio signal sent by the user equipment received by the antenna of the second cell, and the radio signal sent by the user equipment received by the antenna of the first cell is combined with the radio signal sent by the user equipment received by the antenna of the second cell The wireless signals are combined and processed to reduce system interference and power loss.

An embodiment of the present invention provides a method for determining a receiving antenna. The base station detects the signal quality of the random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, wherein , the second cell is a neighboring cell of the first cell, and then, if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value, it is determined that the uplink receiving antenna of the user equipment includes the antenna of the second cell , finally, performing joint receiving processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell. Through this scheme, when the user equipment transitions from the non-dedicated connection state to the connected state, the base station can accurately identify the user equipment without waiting for subsequent downlink or uplink measurements, and without the user equipment consuming extra power to send channel sounding reference signals. The uplink joint receiving antenna enables the user equipment to obtain uplink joint reception when it initially enters the connected state, which enhances the uplink receiving reliability of the user equipment and reduces system interference at the same time.

Embodiment Three

An embodiment of the present invention provides a base station 1, as shown in FIG. 3 , including:

The detection unit 10 is configured to detect the signal quality of the random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, the second cell being the first cell Neighboring districts of the district;

A determining unit 11, configured to determine that the uplink receiving antenna of the user equipment includes the antenna of the second cell if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value ;

The processing unit 12 is configured to perform joint reception processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell.

Further, as shown in FIG. 4, the base station includes a sending unit 13;

The sending unit 13 is configured to send the user equipment received by the antenna of the first cell to the processing unit 12 after the determining unit 11 determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell. before performing joint reception processing on the transmitted radio signal and the radio signal sent by the user equipment received by the antenna of the second cell, sending an acknowledgment message to the user equipment, where the acknowledgment message is used to indicate that the user equipment The random access preamble signal has been successfully detected.

Further, the confirmation message is sent via the antenna of the first cell or the antenna of the second cell.

Further, as shown in FIG. 4, the base station further includes a receiving unit 14;

The receiving unit 14 is configured to receive, through the antenna of the first cell, the wireless signal sent by the user equipment after the sending unit 13 sends an acknowledgment message to the user equipment, and to receive the wireless signal sent by the user equipment during the sending After sending the confirmation message to the user equipment, unit 13 receives the wireless signal sent by the user equipment through the antenna of the second cell.

Further, the wireless signal sent by the user equipment includes a wireless signal sent by the user equipment during the random access process and/or after the random access process ends, the user equipment enters a dedicated connection state, and A radio signal sent on a dedicated uplink channel.

Further, the signal quality of the random access preamble includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

A base station provided by an embodiment of the present invention mainly includes a detection unit, a determination unit, and a processing unit. The base station detects the signal quality of the random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, where the second cell is a neighboring cell of the first cell, and then , if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds the threshold value, it is determined that the uplink receiving antenna of the user equipment includes the antenna of the second cell, and finally, the user equipment received by the antenna of the first cell Joint reception processing is performed on the radio signal sent by the device and the radio signal sent by the user equipment received by the antenna of the second cell. Through this scheme, when the user equipment transitions from the non-dedicated connection state to the connected state, the base station can accurately identify the user equipment without waiting for subsequent downlink or uplink measurements, and without the user equipment consuming extra power to send channel sounding reference signals. The uplink joint receiving antenna enables the user equipment to obtain uplink joint reception when it initially enters the connected state, which enhances the uplink receiving reliability of the user equipment and reduces system interference at the same time.

Embodiment Four

As shown in FIG. 5, an embodiment of the present invention provides a base station 2, including:

The processor 20 is configured to detect the signal quality of the random access preamble signal received from the antenna of the second cell and sent by the user equipment on the random access channel of the first cell, where the second cell is the first a neighboring cell of the cell, and if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value, determine that the uplink receiving antenna of the user equipment includes the second cell The antenna is further configured to perform joint reception processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell.

Further, as shown in FIG. 6, the base station includes a transmitter 21;

The transmitter 21 is configured to, after the processor 20 determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell, transmit the information received by the antenna of the first cell and sent by the user equipment before performing joint reception processing on the radio signal and the radio signal sent by the user equipment received by the antenna of the second cell, sending an acknowledgment message to the user equipment, where the acknowledgment message is used to indicate to the user equipment that the random The access preamble has been successfully detected.

Further, the confirmation message is sent via the antenna of the first cell or the antenna of the second cell.

Further, as shown in FIG. 6, the base station further includes a receiver 22;

The receiver 22 is configured to receive the wireless signal sent by the user equipment through the antenna of the first cell after the transmitter 21 sends a confirmation message to the user equipment, and is used to receive the wireless signal sent by the user equipment during the sending After the unit 21 sends the confirmation message to the user equipment, it receives the wireless signal sent by the user equipment through the antenna of the second cell.

Further, the wireless signal sent by the user equipment includes a wireless signal sent by the user equipment during the random access process and/or after the random access process ends, the user equipment enters a dedicated connection state, and A radio signal sent on a dedicated uplink channel.

Further, the signal quality of the random access preamble includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

A base station provided by an embodiment of the present invention mainly includes a processor. The base station detects the signal quality of the random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, where the second cell is a neighboring cell of the first cell, and then , if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds the threshold value, it is determined that the uplink receiving antenna of the user equipment includes the antenna of the second cell, and finally, the user equipment received by the antenna of the first cell Joint reception processing is performed on the radio signal sent by the device and the radio signal sent by the user equipment received by the antenna of the second cell. Through this scheme, when the user equipment transitions from the non-dedicated connection state to the connected state, the base station can accurately identify the user equipment without waiting for subsequent downlink or uplink measurements, and without the user equipment consuming extra power to send channel sounding reference signals. The uplink joint receiving antenna enables the user equipment to obtain uplink joint reception when it initially enters the connected state, which enhances the uplink receiving reliability of the user equipment and reduces system interference at the same time.

Those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to needs. The internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the above-described system, device, and unit, reference may be made to the corresponding process in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (18)

1. A method for determining a receiving antenna, comprising: Detecting the signal quality of the random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, where the second cell is a neighboring cell of the first cell; If the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value, determine that the uplink receiving antenna of the user equipment includes the antenna of the second cell; performing joint receiving processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell. 2. The method for determining a receiving antenna according to claim 1, wherein after determining that the uplink receiving antenna of the user equipment includes the antenna of the second cell, receiving the antenna of the first cell Before performing joint reception processing on the received wireless signal sent by the user equipment and the wireless signal sent by the user equipment received by the antenna of the second cell, the method further includes: Sending an acknowledgment message to the user equipment, where the acknowledgment message is used to indicate that the random access preamble has been successfully detected. 3. The method for determining a receiving antenna according to claim 2, wherein: The confirmation message is sent via the antenna of the first cell and/or the antenna of the second cell. 4. The method for determining a receiving antenna according to claim 1, wherein the wireless signal received by the antenna of the first cell and the wireless signal sent by the user equipment received by the antenna of the second cell are combined. performing joint reception processing on the wireless signal sent by the user equipment, specifically including: receiving a radio signal sent by the user equipment through an antenna of the first cell; receiving a wireless signal sent by the user equipment through an antenna of the second cell; demodulating the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell, and receiving the radio signal received by the antenna of the first cell performing combining processing on the received wireless signal sent by the user equipment and the wireless signal sent by the user equipment received by the antenna of the second cell, and the combining processing includes multi-antenna signal multipath diversity receiving technology RAKE combining, Likelihood ratio LLR stream merging or decoding result selective merging. 5. The method for determining a receiving antenna according to claim 4, wherein: The wireless signal sent by the user equipment includes the wireless signal sent by the user equipment during the random access process and/or after the random access process ends, the user equipment enters a dedicated connection state, and the dedicated uplink channel wireless signal sent on. 6. The method for determining a receiving antenna according to any one of claims 1-5, wherein: The signal quality of the random access preamble includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio. 7. A base station, characterized in that, comprising: A detection unit, configured to detect the signal quality of a random access preamble signal sent by the user equipment on the random access channel of the first cell received from the antenna of the second cell, the second cell being the first cell the neighboring district; A determining unit, configured to determine that the uplink receiving antenna of the user equipment includes an antenna of the second cell if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value; A processing unit, configured to perform joint reception processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell. 8. The base station according to claim 7, characterized in that the base station comprises a sending unit; The sending unit is configured to, after the determining unit determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell, the processing unit receives the radio data sent by the user equipment received by the antenna of the first cell before performing joint reception processing on the signal and the radio signal sent by the user equipment received by the antenna of the second cell, sending an acknowledgment message to the user equipment, where the acknowledgment message is used to indicate that the random access preamble signal has was successfully detected. 9. The base station according to claim 8, characterized in that, The confirmation message is sent via the antenna of the first cell and/or the antenna of the second cell. 10. The base station according to claim 7, further comprising a receiving unit; The receiving unit is configured to receive, through the antenna of the first cell, the wireless signal sent by the user equipment after the sending unit sends a confirmation message to the user equipment, and is used to transmit the wireless signal sent by the sending unit to the user equipment. After the user equipment sends the confirmation message, the radio signal sent by the user equipment is received through the antenna of the second cell. 11. The base station according to claim 10, wherein the wireless signal sent by the user equipment includes a wireless signal sent by the user equipment during the random access process and/or after the random access process ends , the user equipment turns into a dedicated connection state, and sends a wireless signal on a dedicated uplink channel. 12. The base station according to any one of claims 7-11, characterized in that, The signal quality of the random access preamble includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio. 13. A base station, characterized in that it comprises: a processor, configured to detect the signal quality of a random access preamble signal sent by a user equipment on a random access channel of a first cell received from an antenna of a second cell, the second cell being the first cell neighbor cell, and used for determining that the uplink receiving antenna of the user equipment includes the second cell if the signal quality of the random access preamble signal received by the antenna of the second cell exceeds a threshold value An antenna, and is further configured to perform joint reception processing on the radio signal sent by the user equipment received by the antenna of the first cell and the radio signal sent by the user equipment received by the antenna of the second cell. 14. The base station according to claim 13, wherein the base station comprises a transmitter; The transmitter is configured to transmit the radio signal sent by the user equipment received by the antenna of the first cell after the processor determines that the uplink receiving antenna of the user equipment includes the antenna of the second cell Before performing joint reception with the radio signal sent by the user equipment received by the antenna of the second cell, send an acknowledgment message to the user equipment, where the acknowledgment message is used to indicate to the user equipment that the random access preamble Signal has been detected successfully. 15. The base station according to claim 14, characterized in that, The confirmation message is sent via the antenna of the first cell and/or the antenna of the second cell. 16. The base station according to claim 13, further comprising a receiver; The receiver is configured to receive, through the antenna of the first cell, the wireless signal sent by the user equipment after the transmitter sends an acknowledgment message to the user equipment, and is configured to receive the wireless signal sent by the transmitter to the user equipment After the user equipment sends the confirmation message, the radio signal sent by the user equipment is received through the antenna of the second cell. 17. The base station according to claim 16, wherein the wireless signal sent by the user equipment includes a wireless signal sent by the user equipment during the random access process and/or after the random access process ends , the user equipment turns into a dedicated connection state, and sends a wireless signal on a dedicated uplink channel. 18. The base station according to any one of claims 13-17, characterized in that, The signal quality of the random access preamble includes at least one of chip energy intensity, symbol energy intensity, symbol signal-to-interference ratio, and chip signal-to-interference ratio.

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