CN101800572B - Method and system for transmitting uplink reference signal and user equipment - Google Patents

Abstract

The invention discloses a method and a system for transmitting an uplink reference signal and user equipment. The method comprises the following steps of: a specific channel for the uplink reference signal is set between a base station and the user equipment, and an index of orthogonal spread spectrum sequences each user equipment uses in the specific channel is configured; each user equipment generates the secondary spread-spectrum sequence according to the index of the configured secondary spread-spectrum sequences; each user equipment performing bit scrambling and digital modulation on the secondary spread-spectrum sequences in turn to generate a modulation signal and spreads the spectrum of the modulation signal to obtain the uplink reference signal required to be transmitted; and each user equipment transmits the uplink reference signal to the base station through the specific channel. The method and the system for transmitting the uplink reference signal and the user equipment can reduce the channel cost of the uplink reference signal.

Description

Method and system for transmitting uplink reference signal and user equipment

technical field

The present invention relates to mobile communication technology, in particular to a method and system for transmitting an uplink reference signal and user equipment.

Background technique

In the TD-SCDMA system, the base station (Node B) needs to continuously detect the spatial location of the user equipment (UE). This problem is solved by means of space division multiplexing. Specifically, the cell is divided into several Each UE in different subspaces periodically transmits uplink reference signals to Node B, and Node B receives and detects these uplink reference signals to determine the subspace where each UE is located, thereby determining the spatial position of each UE.

Figure 1 is a schematic diagram of space division multiplexing. As shown in Figure 1, the four floors of a building are set as a cell, and each floor of the cell is divided into a subspace, and each subspace is equipped with an antenna. When UE1 is in subspace 1, UE1 periodically transmits an uplink reference signal, which can be received by all four antennas in the four subspaces, and transmitted to Node B through the four channels shown in Figure 1, Node B compares the four uplink reference channels transmitted from the four channels, and draws the conclusion that the strength of the uplink reference signal received by antenna 1 in subspace 1 is the largest, thereby determining that UE 1 is in subspace 1, that is, on the first floor.

In the prior art, the TD-SCDMA system uses a dedicated physical channel (DPCH) or a non-scheduled enhanced physical uplink channel (E-PUCH) as the channel of the uplink reference signal, and each DPCH or non-scheduled E-PUCH can only provide one When the number of UEs is large, many channels are needed to obtain the spatial positions of all UEs, and the channel overhead is relatively large.

Further, when using the unscheduled E-PUCH as the channel of the uplink reference signal, it is also necessary to occupy the hybrid automatic repeat request indicator channel (E-HICH) resource of the enhanced uplink dedicated channel, so the unscheduled E-PUCH is used as the uplink When the channel of the reference signal is used, it will further cause excessive overhead of network resources.

Contents of the invention

The invention proposes a method for transmitting an uplink reference signal, which can reduce the channel overhead of the uplink reference signal.

The invention also proposes a system for transmitting uplink reference signals, which can reduce the channel overhead of uplink reference signals.

The present invention also proposes a user equipment for transmitting an uplink reference signal, which can reduce channel overhead of the uplink reference signal.

In order to achieve the above object, the technical solution of the present invention is achieved in that:

A method for transmitting an uplink reference signal, the method comprising:

Setting a dedicated channel for the uplink reference signal between the base station and the user equipment, and configuring indexes of mutually orthogonal secondary spreading sequences used by each user equipment in the dedicated channel;

Each user equipment generates a secondary spreading sequence according to the index of the configured secondary spreading sequence;

Each user equipment sequentially performs bit scrambling and digital modulation on the secondary spreading sequence to generate a modulated signal, and then spreads the modulated signal to obtain an uplink reference signal to be transmitted;

Each user equipment transmits an uplink reference signal to the base station through the dedicated channel.

A system for transmitting an uplink reference signal, the system comprising:

The base station is configured to establish a dedicated channel for the uplink reference signal with the user equipment, receive the uplink reference signal transmitted by the user equipment through the dedicated channel, detect the uplink reference signal, and obtain the spatial position of each user equipment;

The user equipment is configured to establish a dedicated channel for an uplink reference signal with the base station, receive and store an index of an orthogonal secondary spreading sequence; generate a secondary spreading sequence according to the index of the orthogonal secondary spreading sequence; Performing bit scrambling and digital modulation on the second spread spectrum sequence in turn to generate a modulated signal; performing spread spectrum on the modulated signal to generate an uplink reference signal; transmitting the uplink reference signal to the base station through a dedicated channel.

A user equipment, the user equipment includes:

A dedicated channel establishment module, configured to establish a dedicated channel for uplink reference signals with the base station;

The configuration information storage module is used to store indexes of mutually orthogonal secondary spread spectrum sequences;

The uplink reference signal generation module is used to query the index of the mutually orthogonal secondary spreading sequence stored in the configuration information storage module; according to the index of the mutually orthogonal secondary spreading sequence, generate the secondary spreading sequence; Carrying out bit scrambling and digital modulation on the secondary spreading sequence in turn to generate a modulated signal; spreading the modulated signal to generate an uplink reference signal; sending the uplink reference signal to an uplink reference signal transmission module;

The uplink reference signal transmission module is configured to receive the uplink reference signal generated by the uplink reference signal generation module; transmit the uplink reference signal to the base station through the dedicated channel established by the dedicated channel establishment module.

In the present invention, since the secondary spreading sequences generated by the user equipment are configured, the secondary spreading sequences generated by different user equipments are orthogonal to each other, therefore, the secondary spreading sequences generated by different user equipments are After interference, digital modulation and spread spectrum, the multiple uplink reference signals transmitted to the base station will not interfere with each other and can be transmitted through the same dedicated channel. After receiving these uplink reference signals, the base station can obtain the spatial location. Compared with the prior art, the present invention can obtain the spatial positions of multiple user equipments only by using one dedicated channel, thereby greatly reducing the channel overhead of the uplink reference signal.

Description of drawings

Fig. 1 is the schematic diagram of space division multiplexing;

FIG. 2 is a flowchart of a method for transmitting an uplink reference signal in an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating an example of a method for transmitting an uplink reference signal in an embodiment of the present invention;

FIG. 4 is a schematic diagram of a system for transmitting an uplink reference signal in an embodiment of the present invention;

Fig. 5 is a schematic diagram of user equipment in an embodiment of the present invention.

Detailed ways

A method for transmitting an uplink reference signal, the method comprising: setting a dedicated channel for the uplink reference signal between a base station and a user equipment, and configuring indexes of mutually orthogonal secondary spreading sequences used by each user equipment in the dedicated channel ; each user equipment generates a second spread spectrum sequence according to the index of the configured second spread spectrum sequence; each user equipment sequentially performs bit scrambling and digital modulation on the second spread spectrum sequence to generate a modulated signal, and then The modulated signal is spread to obtain the uplink reference signal to be transmitted; each user equipment transmits the uplink reference signal to the base station through the dedicated channel.

In the present invention, since the secondary spreading sequences generated by the user equipment are configured, the secondary spreading sequences generated by different user equipments are orthogonal to each other, therefore, the secondary spreading sequences generated by different user equipments are After interference, digital modulation and spread spectrum, the multiple uplink reference signals transmitted to the base station will not interfere with each other and can be transmitted through the same dedicated channel. After receiving these uplink reference signals, the base station can obtain the spatial location. Compared with the prior art, the present invention can obtain the spatial positions of multiple user equipments only by using one dedicated channel, thereby greatly reducing the channel overhead of the uplink reference signal.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 2 is a flowchart of a method for transmitting an uplink reference signal in an embodiment of the present invention. As shown in FIG. 2, the flow of the method for transmitting an uplink reference signal in the embodiment of the present invention is as follows:

Step 201: Set up a dedicated channel for the uplink reference signal between the Node B and the UE, configure the transmission mode of the uplink reference signal for each UE, and configure the mutually orthogonal secondary spreading sequences used by each UE in the dedicated channel for the uplink reference signal index, each UE determines the path loss of the dedicated channel, and configures the empty bits used by each UE.

Here, the dedicated channel for the uplink reference signal set between the Node B and the UE needs to have some characteristics suitable for the transmission of the uplink reference signal. A preferred embodiment of the dedicated channel is: the dedicated channel uses a spreading factor of 16 The Orthogonal Variable Spreading Factor (OVSF) code word of the channel (SF 16) is used as the channelization code, and the digital modulation method of the uplink reference signal is specified as Quadrature Phase Shift Keying (QPSK) modulation. The 44 symbols of an SF 16 code channel can carry a total of 88 bits of information, and 80 bits of them are used for secondary spread spectrum at the bit sequence level. In theory, 80 sequences that meet the requirements of orthogonality can be found, and each UE is allocated a sequence.

The process of configuring the uplink reference signal transmission mode of each UE may be performed by an RNC (Radio Network Controller, radio network controller) on the network side or other management devices configured.

The transmission mode of the uplink reference signal may be: any one or a combination of transmission repetition period, repetition length, time offset, broadcast signal transmission power and expected reception power. Among them, the transmission repetition period refers to the period in which the UE transmits the uplink reference signal; the repetition length refers to the time length for the UE to transmit the uplink reference signal; the time offset refers to the relative time of the UE transmitting the uplink reference signal in each transmission repetition period. The offset of the start time of the transmission repetition period, for example, the transmission repetition period is 10 seconds, the time offset of UE1 is 0 seconds, and the time offset of UE2 is 1 second, which means that in each transmission repetition period, UE1 transmits The time of the uplink reference signal is the start time of the transmission repetition period, and the time when UE2 transmits the uplink reference signal is 1 second after the start of the transmission repetition period; the transmission power of the broadcast signal refers to the transmission power of the base station to all UEs in the same cell The transmit power of the broadcast signal is used to determine the path loss of the broadcast channel in the cell, thereby calculating the transmit power of the uplink reference signal; the expected received power refers to the power of the uplink reference signal that Node B can normally detect and process. When the uplink reference signal transmitted by the UE reaches the Node B through a dedicated channel, a certain power loss occurs. After the power loss, the power of the uplink reference signal cannot be lower than the expected received power, otherwise the Node B may not detect the uplink reference signal. Or the uplink reference signal cannot be processed normally, and the expected received power is used for the UE to determine the transmit power of the uplink reference signal. The usage of each component of the uplink reference signal transmission mode will be described respectively in the following steps.

The RNC at the Node B side can use layer 3 signaling to configure the indexes of mutually orthogonal secondary spreading sequences used by each UE in the dedicated channel of the uplink reference signal. Layer 3 signaling is called radio resource control protocol in full, which belongs to the prior art and will not be described in detail in the present invention. Considering that the number of UEs using a dedicated channel at the same time in real life will not exceed 80, a preferred embodiment of the mutually orthogonal secondary spreading sequences used in the dedicated channel is: the secondary spreading sequence The number is 80.

In the present invention, mutually orthogonal secondary spreading sequences are used to prevent the uplink reference signals transmitted by different UEs from interfering with each other, so as to ensure that in the subsequent process, the uplink reference signals transmitted by multiple UEs can simultaneously use the dedicated uplink reference signal of one uplink reference signal. The channel is transmitted without mutual interference, which achieves the purpose of reducing the channel overhead of the uplink reference signal.

Since there will be a certain path loss when the signal is transmitted in the dedicated channel, each UE needs to determine the size of the dedicated channel path loss in advance. The method is: Node B transmits the broadcast signal to each UE through the broadcast channel; each UE receives the Node B transmission The received power of the broadcast signal is determined; each UE subtracts the received power of the broadcast signal from the preconfigured transmit power of the broadcast signal to obtain the path loss of the broadcast channel. According to the present invention, the path loss of the dedicated channel of the uplink reference signal set in this step is equal to the path loss of the broadcast channel, so that each UE determines the path loss of the dedicated channel, and then determines the uplink reference signal The path loss of the dedicated channel will be used in the process of transmitting power.

The TD-SCDMA system requires that the number of chips contained in each regular time slot of the uplink reference signal transmitted by the UE is certain, which is 704. The present invention only requires that the secondary spreading sequences generated by different UEs are orthogonal to each other. There are many kinds of such secondary spreading sequences, and the length is not fixed. For example, the length can be 80 bits or 40 bits. After the second spread spectrum sequence undergoes subsequent processing, the number of chips in each regular time slot of the uplink reference signal transmitted to the base station may not meet the requirements of the TD-SCDMA system. Therefore, the present invention needs to insert a certain length of empty bits into the secondary spreading sequence generated by each UE, so as to meet the requirement of the TD-SCDMA system on the number of chips. The dummy bits to be inserted need to be pre-configured, and the RNC can configure the dummy bits used by each UE through layer 3 signaling, or can be configured by other management devices to perform the process of configuring the dummy bits used by each UE. The process of configuring the dummy bits used by each UE includes: notifying each UE to insert dummy bits in the second spread spectrum sequence; specifying the form of dummy bits to be inserted by each UE in the second spread spectrum sequence.

In this step, the null bits used by each UE on the same dedicated channel are the same.

Step 202: Each UE generates a secondary spreading sequence that is orthogonal to the secondary spreading sequences generated by other UEs according to the index of the configured secondary spreading sequence, and according to the configured empty bits, in the secondary spreading sequence Null bits are inserted into the sequence to obtain a secondary spread spectrum sequence with the null bits inserted.

Here, each UE generates a secondary spreading sequence orthogonal to secondary spreading sequences generated by other UEs according to the index of the configured secondary spreading sequence, and the form of the secondary spreading sequence is configured in step 201 The index of the secondary spreading sequence is specified. The preferred embodiment of generating the secondary spreading sequence is as follows: after being triggered by the reference signal, each UE generates a secondary spreading sequence according to the index of the configured secondary spreading sequence, wherein the preferred length of the reference signal is 1-bit reference signal, 2-bit or other length reference signal can also be selected, the length of the secondary spreading sequence is preferably 80 bits, and secondary spreading sequences of other lengths can also be used, such as 40-bit secondary spreading sequence.

The method for each UE to insert a null bit in the secondary spreading sequence is as follows: after generating the secondary spreading sequence, each UE inserts a null bit in the secondary spreading sequence according to the configuration in step 201, in the form of a null bit Specified by the form of the empty bits configured in step 201, the preferred insertion position is the middle position of the second spread spectrum sequence, or other positions in the second spread spectrum sequence. For example, when the index of the secondary spreading sequence configured in step 201 specifies that the length of the secondary spreading sequence is 80 bits, and the length of the configured null bit is 8 bits, the null bit is inserted into the secondary spreading sequence Between the 40th bit and the 41st bit of , so as to obtain a second spread spectrum sequence with a length of 88 bits inserted with null bits. For another example, when the index of the second spread spectrum sequence configured in step 201 specifies that the length of the second spread spectrum sequence is 40 bits, and the length of the configured null bit is 4 bits, the null bit is inserted into the second spread spectrum Between the 20th bit and the 21st bit of the sequence, a second spread spectrum sequence with a length of 44 bits inserted with null bits is obtained. A preferred embodiment of each UE inserting null bits in the secondary spreading sequence is as follows: each UE inserts 8 null bits in the secondary spreading sequence.

Step 203: each UE sequentially performs bit scrambling and digital modulation on the secondary spreading sequence inserted with null bits to generate a modulated signal, and then spreads the modulated signal to generate an uplink reference signal.

Here, bit scrambling technology and digital modulation technology are all prior art, and preferred digital modulation method among the present invention is quadrature phase shift keying (QPSK) modulation, also can adopt binary phase phase shift keying (BPSK) modulation .

After the modulated signal is generated, each UE spreads the modulated signal. The spreading method can be a channel with a spreading factor of 16 (SF16), or other spreading methods, such as a channel with a spreading factor of 8 (SF8). ) spread spectrum, or a channel with a spreading factor of 32 (SF32) spread spectrum, etc.

In this way, a certain length of null bits is inserted into the secondary spreading sequence generated by each UE, and the generated secondary spreading sequence inserted with null bits undergoes subsequent bit scrambling, digital modulation and spreading processing, and the obtained uplink The reference signal can meet the requirements of TD-SCDMA system. For example, when step 201 configures each UE to use an 80-bit secondary spreading sequence, step 202 inserts an 8-bit null bit into the secondary spreading sequence, thereby obtaining an 88-bit long The secondary spread spectrum sequence, the secondary spread spectrum sequence inserted with null bits is divided according to the ratio of one data symbol occupying two bits, a total of 44 data symbols, and the 44 data symbols are sequentially bit scrambled, Digital modulation and SF 16 spread spectrum processing, the obtained uplink reference signal has 704 chips per conventional time slot, which meets the requirements of TD-SCDMA system. For another example, when step 201 configures the UE to use a secondary spreading sequence with a length of 40 bits, step 202 inserts a 4-bit null bit into the secondary spreading sequence, thereby obtaining a 44-bit long The secondary spread spectrum sequence, the secondary spread spectrum sequence inserted with null bits is divided according to the ratio of one bit occupied by one data symbol, and there are 44 data symbols in total, and the 44 data symbols are sequentially bit scrambled, digitally Modulation and SF16 spread spectrum processing, the obtained uplink reference signal is still 704 chips per regular time slot, which meets the requirements of TD-SCDMA system.

Since the secondary spreading sequence generated in step 202 is orthogonal, mutual interference will not occur between the uplink reference signals generated by different UEs in this step, and these uplink reference signals can be used in the uplink reference signal set in step 201 at the same time. transmitted on a dedicated channel. For example, when step 201 configures each UE to use a secondary spreading sequence with a length of 80 bits, the dedicated channel of the uplink reference signal can be used by at most 80 UEs at the same time. Compared with the problem in the prior art that each DPCH or one non-scheduled E-PUCH can only be used by one UE, resulting in relatively large channel overhead, the present invention greatly reduces the channel overhead of the uplink reference signal.

Since the dedicated channel for the uplink reference signal is set in step 201, the present invention does not need to occupy E-HICH resources, so the network resource overhead is very small, effectively saving network resources.

Step 204: Each UE performs time division multiplexing processing on the uplink reference signal according to the transmission mode of the uplink reference signal, to obtain a time division multiplexed uplink reference signal.

Here, in order to further improve the space division multiplexing efficiency of the TD-SCDMA system, each UE in the present invention further performs time division multiplexing processing on the uplink reference signal generated in step 203 . To this end, the uplink reference signal transmission mode configured by the RNC or other management devices configured in step 201 further includes: time division multiplexing mode information, used to notify the UE to perform time division multiplexing processing on the uplink reference signal, and to time division multiplex Notify the UE by means of In this way, each UE can perform time division multiplexing processing on the uplink reference signal generated in step 203 according to the time division multiplexing mode information.

The time division multiplexing technology belongs to the prior art. According to the time division multiplexing mode information in the uplink reference signal transmission mode, each UE performs time division multiplexing processing on the uplink reference signal generated in step 203. An example is as follows: RNC notifies UE1, UE2, UE3 and UE4 of the time division multiplexing mode information. Time-division multiplexing mode information includes: time-division multiplexing processing for uplink reference signals; time-division multiplexing multiple is 4; UE1 occupies subframes 1, 5, 9..., UE2 occupies subframes 2, 6, 10..., UE3 occupies subframes 3, 7, 11..., UE4 occupies subframes 4, 8, 12.... After receiving the time division multiplexing mode information, UE1, UE2, UE3 and UE4 perform time division multiplexing processing on the respective generated uplink reference signals according to the time division multiplexing mode information.

Each UE performs time division multiplexing processing on the uplink reference signal, which can further increase the number of UEs that can be accommodated in the dedicated channel of the uplink reference signal configured in step 201, thereby further improving the space division multiplexing efficiency of the TD-SCDMA system. For example, if each UE is configured in step 201 to use a secondary spreading sequence with a length of 80 bits, then without time division multiplexing, the dedicated channel for the uplink reference signal set in step 201 can be used by up to 80 UEs at the same time. Use; when performing time division multiplexing processing and the time division multiplexing multiple is 4, the dedicated channel of the uplink reference signal set in step 201 can be used by up to 320 UEs at the same time. It can be seen that the UE performs time division multiplexing processing on the uplink reference signal , Node B can obtain more spatial location information of UE at the same time, which greatly improves the space division multiplexing efficiency of TD-SCDMA system.

Step 205: Each UE determines the transmission power of the time-division multiplexed uplink reference signal according to the transmission mode of the uplink reference signal and the path loss of the dedicated channel, and transmits the time-division multiplexed uplink reference signal to the Node B through the dedicated channel at the transmission power.

Here, on the basis of the expected received power in the uplink reference signal transmission mode configured in step 201, each UE superimposes the path loss of the dedicated channel determined in step 201, so as to obtain the time division multiplexed uplink reference signal transmit power. The specific method is as follows: in step 201, in the uplink reference signal transmission mode, the expected receiving power is configured for the UE, identified as P_des, the path loss of the uplink reference signal dedicated channel is identified as P-CCPCH Pathloss, and the transmission power of the uplink reference signal is identified as P_trans, then the UE sets the transmit power of the uplink reference signal according to the following formula:

P_trans＝P_des+P-CCPCH Pathloss

In this way, the UE transmits an uplink reference signal with a power of P_trans to the Node B. When the uplink reference signal is transmitted to the Node B, the power loss is the path loss P-CCPCHPathloss, and the power of the uplink reference signal received by the Node B is the expected received power P_des, so that the Node B can normally receive and detect the received uplink reference signal.

According to the transmission repetition period in the uplink reference signal transmission mode configured in step 201, each UE can determine the period of transmitting the time-division multiplexed uplink reference signal to the Node B; each UE according to the uplink reference signal transmission mode configured in step 201 The time offset in the time offset can determine the time when the time-division multiplexed uplink reference signal is transmitted in each transmission repetition period; each UE can determine the time in each transmission repetition period according to the repetition length in the uplink reference signal transmission mode configured in step 201 The time length for transmitting the time-division multiplexed uplink reference signal in the transmission repetition period. When the time for transmitting the time-division multiplexed uplink reference signal arrives in each transmission repetition period, each UE uses the transmission power of the time-division multiplexed uplink reference signal determined in this step to transmit the uplink reference signal set in step 201. The dedicated channel transmits the time-division multiplexed uplink reference signal to the Node B, and the time length for transmitting the time-division multiplexed uplink reference signal is the repetition length configured in the uplink reference signal transmission mode.

In the present invention, since the power of the time-division multiplexed uplink reference signal transmitted by the UE is based on the pre-configured expected receiving power, the path loss of the broadcast channel is superimposed, and the expected receiving power and the path loss of the broadcast channel are long-term constant Therefore, the transmission power of the time-division multiplexed uplink reference signal transmitted by each UE is also constant for a long time, which realizes the long-term power balance between the uplink reference signal and data, thereby ensuring the accuracy of channel estimation by Node B, and then Guarantee the service quality of TD-SCDMA system.

Step 206: The time-division multiplexed uplink reference signal is received by the Node B through the dedicated channel of the uplink reference signal.

Here, when the time-division multiplexed uplink reference signal arrives at the Node B through the dedicated channel of the uplink reference signal configured in step 201, there will be a certain loss of power. In the present invention, it is considered that the size and step of the dedicated channel path loss of the uplink reference signal In 201, the path losses of the broadcast channels determined by each UE are the same.

Step 207: Node B detects the received time-division multiplexed uplink reference signal to obtain the spatial position of each UE.

Here, after the Node B receives the time-division multiplexed uplink reference signal, it detects it using the existing technology to obtain the spatial position of each UE.

For the time-division multiplexing processing of the uplink reference signal by the UE, the Node B keeps the clock synchronization with the UE, and extracts the uplink reference signals transmitted by different UEs from different subframes according to the time-division multiplexing mode information pre-configured for the UE. An example is as follows: In step 204, the RNC notifies each UE of the time division multiplexing mode information: perform time division multiplexing processing on the uplink reference signals of UE1, UE2, UE3 and UE4, the time division multiplexing factor is 4, and UE1 occupies subframes 1 and 5 , 9..., UE2 occupies subframes 2, 6, 10..., UE3 occupies subframes 3, 7, 11..., UE4 occupies subframes 4, 8, 12...; UE1, UE2, UE3 and UE4 follow the time division multiplexing method information, time-division multiplexing is performed on the uplink reference signals generated respectively, then, after receiving these uplink reference signals that have undergone time-division multiplexing processing, Node B obtains UE1's uplink from subframes 1, 5, 9... Reference signal, get UE2's uplink reference signal from subframe 2, 6, 10..., get UE3's uplink reference signal from subframe 3, 7, 11..., get UE4's uplink reference signal from subframe 4, 8, 12... Uplink reference signal. After such processing, the Node B obtains the uplink reference signals of the four UEs at the same time, and thus obtains the spatial position information of the four UEs at the same time through subsequent processing.

For the bit scrambling, digital modulation and spread spectrum processing performed by each UE on the secondary spread spectrum sequence, the Node B performs corresponding bit descrambling, digital demodulation and despread processing on the uplink reference signal.

For each UE's processing of inserting dummy bits into the secondary spreading sequence, the Node B removes the dummy bits from the secondary spreading sequence in which the dummy bits are inserted according to the pre-configured dummy bits for the UE, so as to obtain the Generated secondary spreading sequence.

The Node B associates the secondary spreading sequence with the corresponding UE according to the index of the secondary spreading sequence pre-configured for each UE, so as to obtain the spatial position of each UE.

The Node B obtains the spatial location information of each UE, which can provide reference information for features such as cell splitting (CellPortion) and multi-user-multiple-input multiple-output (MU-MIMO).

Fig. 3 is a schematic diagram illustrating an example of a method for transmitting an uplink reference signal in an embodiment of the present invention. As shown in Figure 3, when the transmission time of the uplink reference signal in a transmission repetition period arrives, the trigger signal with a length of 1 bit triggers the UE, and the UE uses the pre-configured mutual regularity in the dedicated channel of the uplink reference signal The index of the second spread spectrum sequence to generate the second spread spectrum sequence, the length of the second spread spectrum sequence is 80 bits, and the characteristic is that the second spread spectrum sequences generated by different UEs are orthogonal to each other; Null bits, inserting 8-bit null bits into the secondary spreading sequence to obtain a 88-bit secondary spreading sequence with null bits inserted; UE Carry out bit scrambling and QPSK modulation in turn to generate a modulated signal, which is 44 data symbols; then perform SF16 spread spectrum on the modulated signal to generate an uplink reference signal, which has 704 chips and conforms to TD-SCDMA System requirements; UE performs time division multiplexing processing on the uplink reference signal according to the pre-configured time division multiplexing mode information, and obtains the time division multiplexed uplink reference signal; after the UE performs power configuration on the time division multiplexed uplink reference signal, through Dedicated channel to transmit and reach the base station. Uplink reference signals transmitted by 80 UEs can be transmitted in the dedicated channel at the same time.

The invention also provides a system for transmitting uplink reference signals. The system includes: a base station, configured to establish a dedicated channel for an uplink reference signal with user equipment, receive an uplink reference signal transmitted by the user equipment through the dedicated channel, detect the uplink reference signal, and obtain the spatial position of each user equipment; the user equipment , for establishing a dedicated channel for an uplink reference signal with the base station, receiving and storing an index of an orthogonal secondary spreading sequence; generating a secondary spreading sequence according to the index of the orthogonal secondary spreading sequence; Performing bit scrambling and digital modulation on the secondary spreading sequence in sequence to generate a modulated signal; performing spectrum spreading on the modulated signal to generate an uplink reference signal; transmitting the uplink reference signal to the base station through a dedicated channel. .

Fig. 4 is a schematic diagram of a system for transmitting an uplink reference signal in an embodiment of the present invention. As shown in FIG. 4, in an optional embodiment of the present invention, a system for transmitting an uplink reference signal includes:

The management device 401 is configured to transmit the index of the orthogonal secondary spreading sequence to the base station 402 and the user equipment 403 .

The base station 402 is configured to establish a dedicated channel for the uplink reference signal with the user equipment 403, and receives the index of the orthogonal secondary spreading sequence transmitted by the management device 401; receives the uplink reference signal transmitted by the user equipment 403 through the dedicated channel; according to the normal The index of the secondary spreading sequence is used to detect the uplink reference signal, and obtain the spatial position of each user equipment 403;

The user equipment 403 is used to establish a dedicated channel for the uplink reference signal with the base station 402, and is used to receive and save the index of the orthogonal secondary spreading sequence transmitted by the management device 401; according to the index of the orthogonal secondary spreading sequence, generating a secondary spread spectrum sequence; sequentially performing bit scrambling and digital modulation on the secondary spread spectrum sequence to generate a modulated signal; spreading the modulated signal to generate an uplink reference signal; The above-mentioned uplink reference signal.

Here, the management device 401 may be an RNC, or may be other configured management devices. Secondary spreading sequences generated by different user equipments 403 are orthogonal to each other.

The dedicated channel established by the base station and the user equipment needs to be suitable for the transmission of the uplink reference signal. Therefore, the dedicated channel has some characteristics suitable for the transmission of the uplink reference signal. A preferred embodiment of the dedicated channel is: the dedicated channel uses a SF16 OVSF The code word is used as a channelization code, and the uplink reference signal is modulated by QPSK, and the number of mutually orthogonal secondary spreading sequences used is 80. In this way, a preferred embodiment of the user equipment is as follows: after the user equipment is triggered by a 1-bit reference signal, according to the index of the second spread spectrum sequence, a length of 80 bits of the second spread spectrum sequence is generated; in the second spread spectrum sequence 8 empty bits are inserted in ; QPSK modulation is carried out on the secondary spread spectrum sequence after bit scrambling.

Since the secondary spread spectrum sequences generated by user equipment 403 are orthogonal, the secondary spread spectrum sequences generated by different user equipment 403 undergo subsequent bit scrambling, digital modulation and spread spectrum processing, and are transmitted in dedicated channels When , the uplink reference signals will not interfere with each other, thereby ensuring that the dedicated channel between the base station 402 and the user equipment 403 can be used by multiple user equipment 403 to transmit uplink reference signals at the same time, which effectively saves the channel overhead of the uplink reference signals.

In order to improve the quality of the uplink reference signal transmitted by the user equipment 403 received by the base station 402, the management device 401 or the base station 402 pre-configures the transmission of the uplink reference signal by the user equipment 403, for this,

The management device 401 is further configured to transmit to the user equipment 403 a combination of any one or more of the transmission repetition period, repetition length, time offset, broadcast signal transmission power and expected reception power of the uplink reference signal; the base station 402, It is further used for transmitting a broadcast signal to the user equipment 403 through a broadcast channel.

Among them, the transmission repetition period refers to the period in which the user equipment 403 transmits the uplink reference signal; the repetition length refers to the time length for the user equipment 403 to transmit the uplink reference signal; The offset of the time of the reference signal relative to the start time of the transmission repetition period; the expected received power refers to the power of the uplink reference signal that the base station 402 can normally detect and process, when the uplink reference signal transmitted by the user equipment 403 passes through the When the channel reaches the base station 402, a certain loss of power occurs, and the power of the uplink reference signal cannot be lower than the expected received power after the power loss, otherwise the base station 402 may not detect the uplink reference signal, or cannot process the uplink reference signal normally, The expected received power is used for the user equipment 403 to determine the transmission power of the uplink reference signal; the transmission power of the broadcast signal refers to the transmission power of the broadcast signal sent by the base station 402 to all user equipment 403 in the same cell, and is used to determine the transmission power of the broadcast channel The path loss is used to calculate the transmission power of the uplink reference signal; the broadcast signal is used for the user equipment 403 to determine the received power of the broadcast signal, and then determine the path loss of the broadcast channel.

When the management device 401 is further configured to transmit the transmission repetition period of the uplink reference signal to the user equipment 403, the user equipment 403 is further configured to receive the transmission repetition period transmitted by the management device 401; according to the transmission repetition period, determine to The period for the base station 402 to transmit the uplink reference signal.

When the management device 401 is further configured to transmit the repetition length of the uplink reference signal to the user equipment 403, the user equipment 403 is further configured to receive the repetition length transmitted by the management device 401; and determine to transmit to the base station 402 according to the repetition length The time length of the uplink reference signal.

When the management device 401 is further configured to transmit the time offset of the uplink reference signal to the user equipment 403, the user equipment 403 is further configured to receive the time offset transmitted by the management device 401; The time when the base station 402 transmits the uplink reference signal.

When the management device 401 is further used to transmit the transmission power of the broadcast signal and the expected reception power of the uplink reference signal to the user equipment 403, and the base station 402 is further used to transmit the broadcast signal to the user equipment 403 through a dedicated channel, the user equipment 403 , further used to receive the transmission power and expected reception power of the broadcast signal transmitted by the management device 401; receive the broadcast signal transmitted by the base station 402, determine the reception power of the broadcast signal; subtract the reception power of the broadcast signal from the transmission power of the broadcast signal , to obtain the path loss of the broadcast channel; superimpose the path loss of the broadcast channel on the basis of the expected received power to obtain the transmit power of the uplink reference signal; use the transmit power of the uplink reference signal to transmit the signal to the base station through a dedicated channel 402 Transmit the uplink reference signal.

The present invention considers that the path loss of the dedicated channel to the uplink reference signal is equal to the path loss of the broadcast channel, therefore, the present invention superimposes the path loss of the broadcast channel on the basis of the expected received power, thereby obtaining the uplink reference signal transmit power.

The TD-SCDMA system requires that the uplink reference signal transmitted by the user equipment 403 contains a certain number of chips, which is 704, in each regular time slot. However, due to the variety of mutually orthogonal secondary spread spectrum sequences that can be used in the present invention, the length is not fixed. For example, the length can be 80 bits or 40 bits. After subsequent processing, such secondary spread spectrum sequences , the number of chips in each regular time slot in the uplink reference signal transmitted by the user equipment 403 to the base station 402 does not necessarily meet the requirements of the TD-SCDMA system. Therefore, the present invention needs to insert a certain length of empty bits in the secondary spread spectrum sequence to meet the requirement of the TD-SCDMA system on the number of uplink reference signal chips. to this end,

The management device 401 is further configured to transmit information in the form of empty bits to the user equipment 403;

The user equipment 403 is further configured to receive the null bit form information transmitted by the management device 401; insert a null bit into the secondary spreading sequence, the form of the null bit is the null bit form specified in the null bit form information, and insert The position may be the middle position of the second spreading sequence, or other positions of the second spreading sequence.

The dummy bits used by each user equipment 403 on the same dedicated channel are the same.

Here, the preferred embodiment of the management device 401 is the RNC, and the preferred embodiment of the management device 401 transmitting information in the form of empty bits to the user equipment 403 is: the RNC configures the empty bits used by each user equipment through layer 3 signaling, so that the user The device 403 is further configured to, before sequentially performing bit scrambling and digital modulation on the secondary spreading sequence, to insert a null bit into the secondary spreading sequence, and the insertion position is the middle position of the secondary spreading sequence.

In order to further improve the space division multiplexing efficiency of the present invention, time division multiplexing processing can also be performed on the uplink reference signal transmitted by the user equipment 403, for this reason,

The management device 401 is further configured to transmit time division multiplexing mode information to the user equipment 403;

The user equipment 403 is further configured to receive the time division multiplexing mode information transmitted by the management device 401; perform time division multiplexing processing on the uplink reference signal, and the time division multiplexing processing mode is the processing specified in the time division multiplexing mode information Way.

An example of time division multiplexing mode information is as follows: UE1, UE2, UE3 and UE4 are notified to perform time division multiplexing processing; the time division multiplexing multiple is 4; UE1 occupies subframes 1, 5, 9..., UE2 occupies subframes 2, 6, 10... , UE3 occupies subframes 3, 7, 11..., and UE4 occupies subframes 4, 8, 12.... After receiving the time division multiplexing mode information, UE1, UE2, UE3 and UE4 respectively perform time division multiplexing processing on the uplink reference signals generated respectively according to the time division multiplexing mode information.

After the base station 402 receives the uplink reference signal, the existing technology can be used to detect the uplink reference signal, and then obtain the spatial position of each UE, so as to provide reference information for features such as CellPortion or MU-MIMO.

The embodiment of the present invention also provides a user equipment. Fig. 5 is a schematic diagram of user equipment in an embodiment of the present invention. As shown in Figure 5, the user equipment includes:

A dedicated channel establishment module 501, configured to establish a dedicated channel for an uplink reference signal with a base station;

The configuration information storage module 502 is configured to store indexes of mutually orthogonal secondary spreading sequences;

The uplink reference signal generation module 503 is used to query the index of the mutually orthogonal secondary spreading sequence stored in the configuration information storage module 502; generate the secondary spreading sequence according to the index of the secondary spreading sequence; Carrying out bit scrambling and digital modulation in turn on the secondary spreading sequence to generate a modulated signal; spreading the modulated signal to generate an uplink reference signal; sending the uplink reference signal to the uplink reference signal transmission module 504;

The uplink reference signal transmission module 504 is configured to receive the uplink reference signal generated by the uplink reference signal generation module 503 ; and transmit the uplink reference signal to the base station through the dedicated channel established by the dedicated channel establishment module 501 .

Here, the secondary spreading sequences generated by the uplink reference signal generation module 503 in different UEs are orthogonal to each other, and the form is predetermined by the index of the secondary spreading sequence.

The dedicated channel established by the dedicated channel establishment module 501 and the base station needs to be suitable for the transmission of the uplink reference signal. A preferred embodiment of the dedicated channel is: the dedicated channel uses an SF16 OVSF code word as the channelization code, and the digital modulation method In order to adopt QPSK modulation, and the number of mutually orthogonal secondary spreading sequences used is 80, like this, after being triggered by the 1-bit reference signal, the uplink reference signal generation module 503, according to the index of the secondary spreading sequence , generating a second spread spectrum sequence with a length of 80 bits; further inserting 8 null bits into the second spread spectrum sequence; performing QPSK modulation on the second spread spectrum sequence after bit scrambling.

Since the secondary spreading sequences generated by the uplink reference signal generation module 503 are orthogonal, the secondary spreading sequences generated by different UEs undergo subsequent bit scrambling, digital modulation and spreading processing, and the generated uplink reference Mutual interference will not occur when the signals are transmitted in the same channel, which ensures that the dedicated channel for the uplink reference signal established by the dedicated channel establishment module 501 can be used by multiple UEs to transmit the uplink reference signal at the same time, which effectively saves the time spent on the uplink reference signal. channel overhead.

In order to improve the quality of the uplink reference signal transmitted by the UE received by the Node B, the Node B needs to configure the uplink reference signal transmitted by the UE in advance. For this reason,

The configuration information storage module 502 is further configured to store the transmission repetition period, repetition length, time offset, transmission power of the broadcast signal, expected reception power and the combination of any one or more of the reception power of the broadcast signal of the uplink reference signal .

Among them, the transmission repetition period refers to the period during which the uplink reference signal transmission module 504 transmits the uplink reference signal; the repetition length refers to the time length during which the uplink reference signal transmission module 504 transmits the uplink reference signal; the time offset refers to the period in each transmission repetition period , the offset of the time when the uplink reference signal transmission module 504 transmits the uplink reference signal relative to the start time of the transmission repetition period; the expected received power refers to the power of the uplink reference signal that Node B can normally detect and process, when the uplink When the uplink reference signal transmitted by the reference signal transmission module 504 reaches the Node B through the dedicated channel established by the dedicated channel establishment module 501, a certain loss of power occurs, and the power of the uplink reference signal after the power loss cannot be lower than the expected received power, otherwise the Node B may not detect the uplink reference signal, or cannot process the uplink reference signal normally, and the expected received power is used for the uplink reference signal transmission module 504 to determine the transmission power of the uplink reference signal. The transmission power of the broadcast signal and the reception power of the broadcast signal are used to determine the path loss of the broadcast channel, and then determine the transmission power of the uplink reference signal.

When the configuration information storage module 502 is further used to store the transmission repetition period of the uplink reference signal, the uplink reference signal transmission module 504 is further used to query the transmission repetition period stored in the configuration information storage module 502; according to the transmission repetition period, determine The period for transmitting the uplink reference signal through the dedicated channel established by the dedicated channel establishing module 501 .

When the configuration information storage module 502 is further used to store the repetition length of the uplink reference signal, the uplink reference signal transmission module 504 is further used to query the repetition length stored in the configuration information storage module 502; The time length for transmitting the uplink reference signal on the dedicated channel established by the establishing module 501 .

When the configuration information storage module 502 is further used to store the time offset of the uplink reference signal, the uplink reference signal transmission module 504 is further used to query the time offset stored in the configuration information storage module 502; according to the time offset, determine The time when the uplink reference signal is transmitted through the dedicated channel established by the dedicated channel establishing module 501 .

When the configuration information storage module 502 is further used to store the transmission power of the broadcast signal, the expected reception power of the uplink reference signal and the reception power of the broadcast signal,

The uplink reference signal generation module 503 is further used to query the transmission power of the broadcast signal and the reception power of the broadcast signal stored in the configuration information storage module 502; subtract the reception power of the broadcast signal from the transmission power of the broadcast signal to obtain the broadcast channel Path loss; sending the path loss of the broadcast channel to the uplink reference signal transmission module 504;

The uplink reference signal transmission module 504 is further configured to query the expected received power stored in the configuration information storage module 502; receive the path loss of the broadcast channel sent by the uplink reference signal generation module 503; combine the expected received power with the broadcast The channel path loss is superimposed to obtain the transmit power of the uplink reference signal; the uplink reference signal is transmitted to the base station through the dedicated channel established by the dedicated channel establishment module 501 with the transmit power of the uplink reference signal.

The present invention considers that the path loss of the dedicated channel to the uplink reference signal is equal to the path loss of the broadcast channel, therefore, the present invention superimposes the path loss of the broadcast channel on the basis of the expected received power, thereby obtaining the uplink reference signal transmit power.

The TD-SCDMA system requires that the number of chips contained in each regular time slot of the uplink reference signal transmitted by the UE is certain, which is 704. The mutually orthogonal secondary spreading sequences generated by the uplink reference signal generation module 503 can have many kinds, and the length is not fixed, for example, the length can be 80 bits or 40 bits. After subsequent processing, the number of chips in each regular time slot in the uplink reference signal transmitted by the uplink reference signal transmission module 504 to the base station does not necessarily meet the requirements of the TD-SCDMA system. Therefore, the present invention needs to insert a certain length of empty bits in the secondary spread spectrum sequence to meet the requirement of the TD-SCDMA system on the number of uplink reference signal chips. to this end

The configuration information storage module 502 is further used to store the empty bit form;

The uplink reference signal generation module 503 is further used to query the form of the null bit stored in the configuration information storage module 502; insert the null bit in the form of the null bit into the secondary spreading sequence, and the insertion position can be the The middle position of the second spread spectrum sequence may also be other positions of the second spread spectrum sequence.

The empty bits stored in the configuration information storage module 502 in each user equipment on the same dedicated channel are the same.

In order to further improve the space-division multiplexing efficiency of the present invention, time-division multiplexing can also be performed on the uplink reference signal transmitted by the uplink reference signal transmission module 504. For this reason,

The configuration information storage module 502 is further configured to store time division multiplexing mode information;

The uplink reference signal generation module 503 is further configured to query the time division multiplexing mode information stored in the configuration information storage module 502; and perform time division multiplexing processing on the uplink reference signal according to the time division multiplexing mode information.

An example of time division multiplexing mode information is as follows: UE1, UE2, UE3 and UE4 are notified to perform time division multiplexing processing; the time division multiplexing multiple is 4; UE1 occupies subframes 1, 5, 9..., UE2 occupies subframes 2, 6, 10... , UE3 occupies subframes 3, 7, 11..., and UE4 occupies subframes 4, 8, 12...; thus, the configuration information storage module 502 of UE1, UE2, UE3, and UE4 receives and stores the time division multiplexing mode information, and the uplink The reference signal generating module 503 inquires about the time division multiplexing mode information, and performs time division multiplexing processing on the respective generated uplink reference signals according to the provisions of the time division multiplexing mode information.

This shows that the present invention has the following advantages:

(1) In the present invention, since the index of the secondary spreading sequence is pre-configured for each UE, the secondary spreading sequences generated by different UEs are orthogonal to each other, therefore, the secondary spreading sequences generated by multiple UEs pass through their respective After bit scrambling, digital modulation and spread spectrum processing, the generated multiple uplink reference signals will not interfere with each other during transmission, and can be transmitted through a dedicated channel. After Node B receives these uplink reference signals, it will The spatial location of each UE may be obtained. Compared with the prior art, the present invention can obtain the spatial positions of multiple UEs only by using one dedicated channel, thereby greatly reducing the channel overhead of the uplink reference signal.

(2) The present invention does not need to occupy E-HICH resources, so the network resource overhead is very small.

(3) The present invention can transmit uplink reference signals generated by multiple UEs with one dedicated channel without occupying other scarce channel resources, so the present invention can effectively save scarce channel resources.

(4) In the present invention, since the power of the time-division multiplexed uplink reference signal transmitted by the UE is superimposed on the basis of the pre-configured expected receiving power, the path loss is superimposed, and the expected receiving power and path loss are long-term constant, so The power of the time-division multiplexed uplink reference signal transmitted by each UE is also constant for a long time, which realizes the long-term power balance between the uplink reference signal and data, thereby ensuring the accuracy of channel estimation by Node B, thereby ensuring the TD- Quality of service of SCDMA system.

(5) In the present invention, due to adopting the mode of time division multiplexing to configure the uplink reference signal, the dedicated channel of the uplink reference signal set in the present invention can be used by more UEs at the same time, so that Node B can obtain more UEs simultaneously. The spatial position information of the UE, therefore, the present invention can further improve the space division multiplexing efficiency of the TD-SCDMA system.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (13)

1. A method for transmitting an uplink reference signal, characterized in that the method comprises: Setting a dedicated channel for the uplink reference signal between the base station and the user equipment, and configuring indexes of mutually orthogonal secondary spreading sequences used by each user equipment in the dedicated channel; Configuring the empty bits used by each user equipment; Each user equipment generates a secondary spreading sequence according to the index of the configured secondary spreading sequence; Each user equipment inserts a null bit into the secondary spreading sequence; Each user equipment sequentially performs bit scrambling and digital modulation on the secondary spreading sequence to generate a modulated signal, and then spreads the modulated signal to obtain an uplink reference signal to be transmitted; Each user equipment transmits an uplink reference signal to the base station through the dedicated channel. 2. The method of claim 1, wherein, The configuration of the empty bits used by each user equipment specifically includes: configuring the empty bits used by each user equipment by the RNC through layer 3 signaling; The inserting a null bit in the secondary spreading sequence by each user equipment specifically includes: inserting a null bit in a middle position of the secondary spreading sequence by each user equipment. 3. method according to claim 2, it is characterized in that, the step of the dedicated channel of described setting uplink reference signal comprises: this dedicated channel is set to use the OVSF code word of a SF 16 as channelization code, adopts QPSK modulation; The number of mutually orthogonal secondary spreading sequences used in the dedicated channel is 80; The step of generating a second spread spectrum sequence includes: after each user equipment is triggered by a 1-bit reference signal, according to the index of the configured second spread spectrum sequence, generate a second spread spectrum sequence with a length of 80 bits; Inserting 8 null bits into the secondary spreading sequence by each user equipment; The digital modulation is QPSK modulation. 4. The method according to any one of claims 1 to 3, characterized in that the step of configuring the indices of the mutually orthogonal secondary spreading sequences used by each user equipment in the dedicated channel is performed by the RNC ; and / or, The step of configuring the index of the mutually orthogonal secondary spreading sequence used by each user equipment in the dedicated channel includes: configuring the mutually orthogonal secondary spreading sequence index used by each user equipment in the dedicated channel by using layer 3 signaling. Index of the spreading sequence. 5. The method according to any one of claims 1 to 3, characterized in that, The method further includes: the RNC pre-configures the transmission repetition period for each user equipment to transmit the uplink reference signal; then the step of each user equipment transmitting the uplink reference signal to the base station through the dedicated channel includes: each user equipment uses the described The transmission repetition period is a period, and the uplink reference signal is transmitted to the base station through the dedicated channel; and / or, The method further includes: the RNC pre-configures the repetition length of each user equipment to transmit the uplink reference signal; then the step of each user equipment transmitting the uplink reference signal to the base station through the dedicated channel includes: each user equipment transmits the uplink reference signal through the dedicated channel The channel transmits the uplink reference signal to the base station, and the time length of the transmission is the repetition length; and / or, The method further includes: the RNC pre-configures the time offset for each user equipment to transmit the uplink reference signal; then the step of each user equipment transmitting the uplink reference signal to the base station through the dedicated channel includes: each user equipment according to the The time offset is to determine the moment when the uplink reference signal is transmitted; when each user equipment detects that the moment when the user equipment transmits the uplink reference signal arrives, transmit the uplink reference signal to the base station through the dedicated channel; and / or, The method further includes: the RNC pre-configures the expected reception power of the uplink reference signal and the transmission power of the broadcast signal for each user equipment; the base station transmits the broadcast signal to each user equipment through a broadcast channel; each user equipment receives the broadcast signal , to determine the received power of the broadcast signal; each user equipment subtracts the received power of the broadcast signal from the transmitted power of the broadcast signal to obtain the path loss; each user equipment based on the expected received power superimposing the path loss on top to obtain the transmit power of the uplink reference signal; then the step of transmitting the uplink reference signal to the base station for each user equipment through the dedicated channel includes: each user equipment transmits the uplink reference signal with the transmit power through the The dedicated channel is used to transmit the uplink reference signal to the base station. 6. The method according to any one of claims 1 to 3, characterized in that, Before each user equipment generates a second spread spectrum sequence according to the index of the configured second spread spectrum sequence, the method further includes: the RNC notifies each user equipment of the time division multiplexing processing method; After spreading the modulated signal to obtain the uplink reference signal to be transmitted, before each user equipment transmits the uplink reference signal to the base station through the dedicated channel, the method further includes: each user equipment according to the time division multiplexing In a processing manner, time division multiplexing processing is performed on the uplink reference signal. 7. A system for transmitting an uplink reference signal, characterized in that the system comprises: The base station is configured to establish a dedicated channel for the uplink reference signal with the user equipment, receive the uplink reference signal transmitted by the user equipment through the dedicated channel, detect the uplink reference signal, and obtain the spatial position of each user equipment; The user equipment is configured to establish a dedicated channel for an uplink reference signal with the base station, receive and save an index of an orthogonal secondary spreading sequence; generate a secondary spreading sequence according to the index of the orthogonal secondary spreading sequence; receive an empty bit form information; inserting dummy bits into the secondary spread spectrum sequence, the form of the dummy bits being the dummy bit form specified in the dummy bit form information; performing bit scrambling and digital modulation on the second spread spectrum sequence in sequence , generating a modulated signal; spreading the modulated signal to generate an uplink reference signal; transmitting the uplink reference signal to the base station through a dedicated channel. 8. The system according to claim 7, characterized in that the system further comprises an RNC configured to configure the null bits used by each user equipment through layer 3 signaling; In the user equipment, the insertion position of the null bit in the second spreading sequence is the middle position of the second spreading sequence. 9. The system according to claim 8, characterized in that, the dedicated channel established by the base station and the user equipment uses an SF16 OVSF codeword as the channelization code, adopts QPSK modulation, and uses mutually orthogonal quadratic The number of spreading sequences is 80; The user equipment, after being triggered by a 1-bit reference signal, generates a secondary spreading sequence with a length of 80 bits according to the index of the secondary spreading sequence; inserting 8 null bits into the secondary spreading sequence; Carry out QPSK modulation on the secondary spread spectrum sequence after bit scrambling. 10. The system according to any one of claims 7 to 9, wherein the system further comprises an RNC, The RNC is configured to transmit the index of the orthogonal secondary spreading sequence to the user equipment, and further configure the transmission repetition period of the uplink reference signal to the user equipment; then the user equipment is further used to receive the transmission repetition period transmitted by the RNC; Determine a period for transmitting the uplink reference signal to the base station according to the transmission repetition period; and / or, The RNC is further used to transmit the repetition length of the uplink reference signal to the user equipment; the user equipment is further used to receive the repetition length transmitted by the RNC; according to the repetition length, determine the time length for transmitting the uplink reference signal to the base station ; and / or, The RNC is further configured to transmit the time offset of the uplink reference signal to the user equipment; the user equipment is further configured to receive the time offset transmitted by the RNC; and determine to transmit the uplink reference signal to the base station according to the time offset the moment of the reference signal; and / or, The base station is further used to transmit a broadcast signal to the user equipment through a broadcast channel; the RNC is further used to transmit the transmission power of the broadcast signal and the expected reception power of the uplink reference signal to the user equipment; the user equipment is further used to Receiving the transmission power of the broadcast signal transmitted by the RNC and the expected reception power; receiving the broadcast signal transmitted by the base station, determining the reception power of the broadcast signal; subtracting the broadcast signal from the transmission power of the broadcast signal received power to obtain the path loss of the broadcast channel; superimposing the path loss of the broadcast channel on the basis of the expected received power to obtain the transmit power of the uplink reference signal; using the transmit power of the uplink reference signal, transmitting the uplink reference signal to the base station through a dedicated channel; and / or, The RNC is further used to transmit information in the form of empty bits to the user equipment; the user equipment is further used to receive the information in the form of empty bits transmitted by the RNC; inserting empty bits into the secondary spreading sequence, the form of the empty bits is The dummy bit form specified in the dummy bit form information, the insertion position is the middle position of the second spread spectrum sequence; and / or, The RNC is further used to transmit time-division multiplexing mode information to the user equipment; the user equipment is further used to receive the time-division multiplexing mode information transmitted by the RNC; to perform time-division multiplexing processing on the uplink reference signal, and time-division multiplexing processing The method is the processing method specified in the time division multiplexing method information. 11. A user equipment, characterized in that the user equipment comprises: A dedicated channel establishment module, configured to establish a dedicated channel for uplink reference signals with the base station; The configuration information storage module is used to store the indexes of mutually orthogonal secondary spread spectrum sequences and the form of empty bits; The uplink reference signal generation module is used to query the index of the mutually orthogonal secondary spreading sequence stored in the configuration information storage module; according to the index of the mutually orthogonal secondary spreading sequence, generate the secondary spreading sequence; Querying the empty bit form stored in the configuration information storage module, inserting the empty bit in the form of the empty bit in the second spread spectrum sequence; performing bit scrambling and digital modulation on the second spread spectrum sequence in turn, generating a modulated signal; spreading the modulated signal to generate an uplink reference signal; sending the uplink reference signal to an uplink reference signal transmission module; The uplink reference signal transmission module is configured to receive the uplink reference signal generated by the uplink reference signal generation module; transmit the uplink reference signal to the base station through the dedicated channel established by the dedicated channel establishment module. 12. The user equipment according to claim 11, characterized in that, The dedicated channel establishment module establishes the dedicated channel with the base station, the dedicated channel uses an SF 16 OVSF code word as the channelization code, adopts QPSK modulation, and the number of mutually orthogonal secondary spread spectrum sequences used is 80; The uplink reference signal generating module, after being triggered by a 1-bit reference signal, generates a second spread spectrum sequence with a length of 80 bits according to the index of the second spread spectrum sequence; further inserting 8 into the second spread spectrum sequence Null bits; perform QPSK modulation on the second spread spectrum sequence after bit scrambling. 13. The user equipment according to claim 11 or 12, characterized in that, The configuration information storage module is further used to store the transmission repetition period of the uplink reference signal; the uplink reference signal transmission module is further used to query the transmission repetition period stored in the configuration information storage module; according to the transmission repetition period, determine the transmission repetition period through the dedicated The period for transmitting the uplink reference signal on the dedicated channel established by the channel establishment module; and / or, The configuration information storage module is further used to store the repetition length of the uplink reference signal; the uplink reference signal transmission module is further used to query the repetition length stored in the configuration information storage module; according to the repetition length, it is determined to establish a module through a dedicated channel The length of time for the established dedicated channel to transmit the uplink reference signal; and / or, The configuration information storage module is further used to store the time offset of the uplink reference signal; the uplink reference signal transmission module is further used to query the time offset stored in the configuration information storage module; according to the time offset, determine the time offset through the dedicated The moment when the dedicated channel established by the channel establishment module transmits the uplink reference signal; and / or, The configuration information storage module is further used to store the transmission power of the broadcast signal and the expected reception power of the uplink reference signal; stores the reception power of the broadcast signal transmitted by the base station through the broadcast channel; the uplink reference signal generation module is further used to query the configuration The transmission power of the broadcast signal and the reception power of the broadcast signal stored in the information storage module; subtracting the reception power of the broadcast signal from the transmission power of the broadcast signal to obtain the path loss of the broadcast channel; The path loss of the broadcast channel is sent to the uplink reference signal transmission module; the uplink reference signal transmission module is further used to query the expected received power stored in the configuration information storage module; receive the path of the broadcast channel sent by the uplink reference signal generation module Loss; superimposing the expected receiving power and the path loss of the broadcast channel to obtain the transmission power of the uplink reference signal; using the transmission power of the uplink reference signal to establish the uplink reference signal through the dedicated channel establishment module The dedicated channel is transmitted to the base station; and / or, Configuration information storage module, the insertion position of inserting a null bit in the second spread spectrum sequence is the middle position of the second spread spectrum sequence; and / or, The configuration information storage module is further used to store time-division multiplexing mode information; the uplink reference signal generation module is further used to query the time-division multiplexing mode information stored in the configuration information storage module; according to the time-division multiplexing mode information, all The uplink reference signal is time-division multiplexed.

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