CN101155400A - Device and method for transmitting control signaling in wireless communication system - Google Patents

Abstract

A device and method for transmitting control signaling in a wireless communication system, comprising the step of: corresponding to the deployment situation in which the system bandwidth in the wireless communication system is greater than the bandwidth supported by some user equipment, the base station in the above wireless communication system divides its system bandwidth are two partial bandwidths; the above-mentioned base station allocates resource blocks to each user equipment; for each user equipment, the above-mentioned base station transmits the main control signaling of corresponding channel resource allocation in one partial bandwidth; when the bandwidth supported by the above-mentioned user equipment is equal to In the system bandwidth, in the channel resources indicated by the above-mentioned primary control signaling, the above-mentioned base station transmits the secondary control signaling corresponding to the above-mentioned user equipment to indicate the channel resource allocation status in another part of the bandwidth; the above-mentioned base station sends the above-mentioned including Control signaling including primary control signaling and secondary control signaling. By adopting the method of the present invention, the format of control signaling transmitted by user equipments with different bandwidth processing capabilities can be made the same, thereby reducing the complexity of resources occupied by the base station when allocating control signaling.

Description

Device and method for transmitting control signaling in wireless communication system

technical field

The present invention relates to a wireless communication system, in particular to a device and a method for transmitting control signaling in the wireless communication system.

Background technique

At present, the 3GPP standardization organization has begun to carry out long-term evolution (Long Term Evolution, hereinafter referred to as LTE) of its existing system specifications. Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) technology has become the downlink transmission scheme adopted by LTE because of its high spectrum utilization rate and low processing complexity.

OFDM technology is essentially a multi-carrier modulation communication technology. Its basic principle is to decompose a high-rate data stream into several low-rate data streams and transmit them simultaneously on a group of mutually orthogonal sub-carriers. OFDM technology has performance advantages in many aspects due to its multi-carrier nature. (1) A significant advantage of OFDM technology is that since the data is transmitted in parallel on multiple subcarriers, the length of the symbol on each subcarrier increases accordingly, and it is not sensitive to channel delay; by further adding a guard interval to each symbol, That is, a cyclic prefix (CP, CyclicPrefix) is introduced to completely eliminate inter-symbol interference (ISI) when the channel delay is smaller than the length of the cyclic prefix. In this way, each subcarrier experiences a flat fading channel. (2) The spectrum utilization rate of OFDM technology is high, and OFDM signals actually overlap in the frequency domain, which greatly improves the spectrum utilization rate. (3) OFDM technology has a strong ability to resist narrow-band interference and frequency selective fading. Through channel coding and interleaving, OFDM can obtain frequency diversity and time diversity gain, thus effectively resisting narrowband interference and frequency selective fading. (4) OFDM technology modulation can be realized through baseband IFFT transformation, and IFFT/FFT has a mature and fast calculation method, which can be easily realized in DSP chip and hardware structure.

The frame structure of the existing LTE downlink OFDM system is shown in FIG. 1 . Wireless resources are structured in frames (101-103), and the frame length is the same as WCDMA, which is 10ms; each wireless frame is subdivided into multiple subframes (104-107) (the current assumption is that each frame contains 20 subframes, and the subframes The length is 0.5ms); each subframe includes multiple OFDM symbols according to different configurations, the short CP subframe includes 7 symbols (108), and the long CP subframe includes 6 symbols (109). In the LTE system, it is necessary to effectively support unicast services and multicast/broadcast services at the same time, and the most possible multiplexing method is time division multiplexing (TDM). Among them, the OFDM symbol of the unicast service only needs a relatively short cyclic prefix (CP, about 4.8 μs). For the multicast/broadcast service, considering that the LTE system does not tend to require system synchronization and the influence of the propagation delay of each cell, the OFDM symbol of the multicast/broadcast service must be configured with a relatively long CP (about 16.7μs). It is precisely because the CP lengths that need to be configured for unicast OFDM symbols and multicast/broadcast OFDM symbols are different that the number of OFDM symbols that can be contained in the corresponding subframe is different (short CP subframe 7 symbols, long CP subframe 6 symbols).

In the current LTE discussion, there are two basic ways of dividing channel resources. The first is a partial transmission channel, that is, some continuous subcarriers are divided into a channel as resource blocks. This method is conducive to the use of multi-user diversity, thereby improving the throughput of the system. The other is a distributed transmission channel, that is, the time-frequency resource allocated to a certain user equipment is dispersed in the whole or part of the frequency band according to a certain rule, so that the gain of frequency diversity is relatively large. These two channel division methods have their own advantages and complement each other, and can be applied in the same subframe at the same time, so that in a subframe, some user equipments can use localized transmission channels to obtain multi-user diversity gain, and other user equipments can use distributed transmission channels. The frequency diversity gain can be obtained through the transmission channel of the formula.

Scheduling and transmission of user equipment data is based on resource blocks. In the current discussion on the division of LTE downlink channel resources, the concepts of physical resource block (Physical resource block) and virtual resource block (Virtual resource block) are proposed. A physical resource block includes M consecutive subcarriers in the frequency domain and N OFDM symbols in time. The virtual resource block is an abstraction of channel resources above the physical resource block, and the virtual resource block is divided into a distributed virtual resource block and a localized virtual resource block. The distributed virtual resource block corresponds to the resource of the distributed transmission channel, and the localized virtual resource block corresponds to the resource of the localized transmission channel.

For the convenience of description, the present invention uniformly uses resource blocks to represent the basic unit of downlink channel resource scheduling in the following description. For the downlink direction, the resource blocks correspond to localized virtual resource blocks or distributed virtual resource blocks.

In the current discussion, the system bandwidth supported by LTE includes 1.25MHz, 1.6MHz, 2.5MHz, 5MHz, 10MHz, 15MHz and 20MHz. The user equipment needs to support at least a system bandwidth of less than or equal to 10MHz, that is, send and receive data in a system bandwidth of 1.25MHz to 10MHz. In this way, when the system bandwidth is 20 MHz, there are multiple user equipments with different bandwidth capabilities: that is, some user equipments support the system bandwidth of 20 MHz, while other user equipments do not. The same problem also appears in the 15MHz system bandwidth. When the base station sends data to the user equipment, the bandwidth of the control signaling and the data must be smaller than or equal to the bandwidth processing capability of the user equipment.

Corresponding to the above-mentioned situation of user equipments with different bandwidth processing capabilities in the 15MHz and 20MHz system bandwidths, an example of an existing base station transmission control signaling method is shown in FIG. 2 . In Fig. 2, the system bandwidth is 20 MHz, and the control signaling of the user equipment is transmitted in each OFDM symbol. Control signaling 201 and 202 are transmitted in a sub-bandwidth 207 of 10 MHz, while control signaling 203 and 204 are transmitted in another sub-bandwidth 208 of 10 MHz. The difference is that the control signaling 205 and 206 are transmitted in the 20 MHz system bandwidth. In this mode, the base station configures the user equipment detection control signaling 201, 202, 203 and 204 with 10MHz bandwidth processing capability (specifically, the user equipment detection control signaling 201 and 202 in the 10MHz bandwidth 207, and the user equipment detection control signaling 202 in the 10MHz bandwidth 208 The user equipment configured with 20MHz bandwidth processing capability detects control signaling 205 and 206). The control signaling indicates information such as resource allocation and transmission format of the user equipment. For the resource allocation indication, the control signaling 201 and 202 indicate the resource allocation information corresponding to a certain user equipment in the 10MHz bandwidth 207, and the control signaling 203 and 204 indicate that the resource allocation information corresponding to a certain user equipment in the 10MHz bandwidth 208 The resource allocation information of the user equipment, and the control signaling 205 and 206 indicate the resource allocation information corresponding to a certain user equipment in the entire 20 MHz bandwidth.

The method for indicating resource allocation information by control signaling as shown in FIG. 2 mainly has two disadvantages:

a) In this method, the transmission bandwidths of the control signaling detected by user equipments with different bandwidth processing capabilities are different. This will increase the complexity of the base station when configuring control signaling.

b) In this method, the formats of the control signaling detected by user equipments with different bandwidth processing capabilities are usually different. This is because information indicating resource allocation is required in the control signaling, and the number of bits required for the information is usually related to the indicated bandwidth. This will also increase the complexity of the base station when configuring control signaling.

Contents of the invention

The object of the present invention is to provide a device and method for transmitting control signaling in a wireless communication system.

According to one aspect of the present invention, a method for transmitting control signaling in a wireless communication system is proposed, comprising steps:

a) corresponding to the deployment situation in which the system bandwidth in the wireless communication system is greater than the bandwidth supported by some user equipments, the base station in the wireless communication system divides its system bandwidth into two partial bandwidths;

b) the base station allocates resource blocks to each user equipment;

c) For each user equipment, the base station transmits corresponding main control signaling of channel resource allocation in a partial bandwidth;

d) When the bandwidth supported by the user equipment is equal to the system bandwidth, in the channel resources indicated by the primary control signaling, the base station transmits secondary control signaling corresponding to the user equipment to indicate another partial bandwidth The channel resource allocation status in ;

e) The base station sends control signaling including primary control signaling and secondary control signaling.

According to another aspect of the present invention, a method for user equipment to receive control signaling is also proposed, where the control signaling includes primary control signaling and secondary control signaling, and the method includes the following steps:

a) The user equipment receives the main control signaling;

b) When the bandwidth supported by the user equipment is equal to the system bandwidth, the user equipment reads the secondary control signaling transmitted by the base station according to the position of the channel resource indicated by the primary control signaling, and obtains another part through the secondary control signaling Channel resource allocation status in the bandwidth;

c) The user equipment receives user data on resource blocks allocated by the base station.

According to another aspect of the present invention, a device for generating control signaling at the base station side is also proposed, including a transmitting part, and further including:

A scheduler module, configured to determine how to allocate resource blocks to each user equipment according to the channel quality indicator CQI of the user equipment, the bandwidth supported by the user equipment, and the data service information of the user equipment;

A control signaling generator module, configured to generate primary control signaling to indicate the channel resource allocation status in the part of the bandwidth it transmits according to the status of resource block allocation, and for user equipment supporting system bandwidth, generate secondary control signaling to indicate Indicates the channel resource allocation status in another part of the bandwidth;

Wherein, the transmitting device transmits the control signaling including the primary control signaling and the secondary control signaling into the wireless channel.

According to another aspect of the present invention, a device for processing control signaling at the user equipment side is also proposed, including a receiving part, and further including:

a physical channel demultiplexer, configured to demultiplex control signaling including primary control signaling and secondary control signaling, and other physical channels from received signals;

The control signaling processor is configured to read the secondary control signaling transmitted by the base station according to the position of the channel resource indicated by the primary control signaling when the bandwidth supported by the user equipment is equal to the system bandwidth, and pass the secondary control signaling Obtain the channel resource allocation status in another part of the bandwidth;

Wherein, the receiving device receives the radio frequency signal sent by the base station, performs radio frequency reception and analog-to-digital conversion and other processing, and then transmits it to the physical channel demultiplexer.

By adopting the control signaling transmission method proposed by the present invention, the format of control signaling transmitted by user equipments with different bandwidth processing capabilities can be made the same, thereby reducing the complexity of resources occupied by the base station when allocating control signaling.

Description of drawings

The above objects, advantages and features of the present invention will become apparent by referring to the following detailed description of preferred embodiments employed in conjunction with the accompanying drawings, wherein:

Fig. 1 is the frame structure of the downlink OFDM system in LTE;

FIG. 2 is an example of a manner in which an existing base station transmits control signaling;

FIG. 3 is an example of the base station transmitting secondary control signaling in channel resources;

FIG. 4 is an example 1 of the base station transmitting secondary control signaling in channel resources in localized transmission;

FIG. 5 is an example 2 of the base station transmitting secondary control signaling in channel resources in localized transmission;

FIG. 6 is an equipment diagram of base station scheduling resources and transmitting control signaling;

FIG. 7 is a device diagram of user equipment processing control signaling;

Figure 8 is an example of a hardware block diagram of a base station;

Fig. 9 is an example of a hardware block diagram of a user equipment.

Detailed ways

The present invention proposes a device and method for transmitting control signaling in a wireless communication system, including the following steps:

Operation of the base station:

a) Corresponding to the deployment situation in which the system bandwidth in the wireless communication system is greater than the bandwidth supported by some user equipments, the base station in the above wireless communication system divides its system bandwidth into two partial bandwidths;

b) the base station allocates resource blocks to each user equipment;

c) For each user equipment, the base station transmits corresponding main control signaling for channel resource allocation in a partial bandwidth;

d) When the bandwidth supported by the user equipment is equal to the system bandwidth, in the channel resources indicated by the control signaling, the base station transmits secondary control signaling corresponding to the user equipment to indicate channel resource allocation in another part of the bandwidth situation;

e) The above-mentioned base station sends control signaling including primary control signaling and secondary control signaling.

In step a) of the present invention, corresponding to the deployment situation in which the system bandwidth in the wireless communication system is greater than the bandwidth supported by some user equipment, the base station in the above wireless communication system divides its system bandwidth into two partial bandwidths, each of which The bandwidths are all less than or equal to the bandwidth supported by the user equipment. In the following description, it is assumed that the system bandwidth is B, and the partial bandwidths are respectively B ₁ and B ₂ . Taking the 20MHz system bandwidth as an example, some of the served user equipments support the 20MHz system bandwidth, while some only support the 10MHz system bandwidth. The base station divides its system bandwidth into two 10MHz partial bandwidths. As shown in FIG. 2 , the entire system bandwidth is divided into partial bandwidths 207 and 208 .

In step b) of the present invention, the base station allocates resource blocks to each user equipment according to information such as channel quality indication (CQI) of the user equipment, bandwidth supported by the user equipment, and data service information of the user equipment. For the downlink, the data service information of the user equipment refers to the data volume of each user equipment and the corresponding service quality requirements. Taking the system bandwidth of 20MHz as an example, corresponding to the user equipment supporting the 10MHz bandwidth, the base station allocates resource blocks within the 10MHz bandwidth where it is located. Corresponding to the user equipment supporting the 20MHz bandwidth, the base station allocates resource blocks within the entire 20MHz bandwidth.

In step c) of the present invention, corresponding to the user equipment that does not support the system bandwidth, the base station selects a control channel within its bandwidth to transmit control signaling for channel resource allocation. In the following description, the control signaling for allocating transport channel resources is called main control signaling. Corresponding to the user equipment supporting the system bandwidth, there are two cases. The first case is that all resource blocks allocated by the base station to the user equipment in step b) are in a certain part of the bandwidth. In this case, the base station selects a control channel within its part of the bandwidth to transmit the main control signaling. The second situation is that some of the resource blocks allocated by the base station to the user equipment in step b) are in the partial bandwidth _B1 and other resource blocks are in the partial bandwidth _B2 . In this case, the base station selects a control channel in the partial bandwidth _B1 or the partial bandwidth _B2 according to a certain criterion to transmit the main control signaling. For example, the base station may select part of the bandwidth for transmitting more resource blocks to transmit the main control signaling. In this step, the main control signaling transmitted by the base station may also include other information, such as transmission format, Hybrid Automatic Repeat Request (HARQ for short) information and the like.

In step d) of the present invention, corresponding to the user equipment that does not support the system bandwidth, all channel resource allocation status has been transmitted in step c), so no additional signaling is required to indicate the channel resource allocation status.

In step d) of the present invention, corresponding to the user equipment supporting the system bandwidth, the base station transmits another control signaling corresponding to the user equipment in the channel resource indicated by the main control signaling to indicate the channel resource in another part of the bandwidth. Channel resource allocation status. In the following description, this signaling is referred to as secondary control signaling. It should be noted that, depending on the design, the secondary control signaling itself may contain one or two signalings. The specific design will be given below. Taking FIG. 3 as an example, part of the resource block (data 302 ) allocated by the base station to the user equipment is in the 10 MHz partial bandwidth 304 , and part is in the 10 MHz partial bandwidth 305 . The base station indicates in the main control signaling 301 the channel resource allocation status of the user equipment in the 10 MHz partial bandwidth 304 . In the channel resource indicated by the primary control signaling 301 , the base station transmits the secondary control signaling 303 to indicate the allocation status of the channel resource of the user equipment in the 10 MHz partial bandwidth 305 .

In step d) of the present invention, corresponding to the user equipment supporting the system bandwidth, the secondary control signaling can be transmitted separately, or can be multiplexed with other control information (such as transmission format, HARQ information) and then transmitted. There are two ways to transmit the secondary control signaling after being multiplexed with other control information. One way is to adopt a fixed format, that is, regardless of whether the base station allocates channel resources to the user equipment in another part of the bandwidth, the multiplexed control signaling includes information indicating the channel resource allocation status in another part of the bandwidth. secondary control signaling. Another way is to use two formats: that is, when the base station allocates channel resources for the user equipment in another part of the bandwidth, the multiplexed control signaling contains secondary control signaling indicating the channel resource allocation status in another part of the bandwidth. signaling, and other control information; when the base station does not allocate channel resources for the user equipment in another part of the bandwidth, the multiplexed control signaling only includes other control information.

In step d) of the present invention, corresponding to the distributed channel transmission, one way is that the base station uses one bit information in the secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth. For example, "0" is used to indicate that no channel resources are allocated to the user equipment in another part of the bandwidth, and "1" is used to indicate that channel resources are allocated to the user equipment in another part of the bandwidth. "0" may also be used to indicate that the user equipment is allocated channel resources in another part of the bandwidth, and "1" may be used to indicate that no channel resources are allocated to the user equipment in another part of the bandwidth. Since the main purpose of using the distributed transmission method is to maximize the use of frequency domain diversity, a way to save signaling is that when the user equipment allocates channel resources in both partial bandwidths, the channel resources in the two partial bandwidths The location is the same.

Corresponding to the above-mentioned base station using one bit information in the secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth, there are two ways to transmit the bit information. The first way is to adopt the way of code division multiplexing (Code Division Multiplexing, hereinafter referred to as CDM). An implementation manner of adopting the CDM method is to modulate the bit information with a sequence, and superimpose it on some or all subcarriers of the channel resource indicated by the control signaling. Another way is to use time division-frequency division multiplexing, that is, use part of the subcarriers of the channel resources indicated by the control signaling to transmit the bit information.

In the step d) of the present invention, corresponding to the partial channel transmission, there are three ways for the base station to transmit the secondary control signaling:

个资源块。因此用比特映射的方式指示另一个部分带宽中信道资源分配状况的方法是传输一个比特的序列 $a_i,i=\mathrm{1,2},...\frac{N}{2M},$ 其中a_i＝0代表该资源块没有分配给该用户设备，而a_i＝1代表该资源块分配给该用户设备。当然也可以用a_i＝0代表该资源块分配给该用户设备，而a_i＝1代表该资源块没有分配给该用户设备。The first way is: the secondary control signaling directly indicates the channel resource allocation status in another part of the bandwidth. One implementation is a bitmap indicating channel resource allocation. Assume that there are N available subcarriers in the system bandwidth, and a resource block contains M subcarriers in the frequency domain. For each part of the bandwidth, there are

resource blocks. Therefore, the method of indicating the channel resource allocation status in another part of the bandwidth in the form of bit mapping is to transmit a sequence of bits $a_i,i=\mathrm{1,2},...\frac{N}{2m},$ Where a _i =0 represents that the resource block is not allocated to the user equipment, and a _i =1 represents that the resource block is allocated to the user equipment. Of course, a _i =0 may also be used to represent that the resource block is allocated to the user equipment, and a _i =1 to represent that the resource block is not allocated to the user equipment.

The second method is that the base station indicates whether channel resources are allocated to the user equipment in another part of the bandwidth by using one bit information, and when the bit information indicates that channel resources are allocated to the user equipment in another part of the bandwidth, use a separate Control signaling to indicate specific channel resource allocation status. In the following description, the above-mentioned one-bit information is referred to as secondary control signaling A, and the separate control signaling indicating a specific channel resource allocation status is referred to as secondary control signaling B. For secondary control signaling A, one way is to use "0" to indicate that no channel resources are allocated to the user equipment in another part of the bandwidth, and use "1" to indicate that channel resources are allocated to the user equipment in another part of the bandwidth. channel resources. "0" may also be used to indicate that the user equipment is allocated channel resources in another part of the bandwidth, and "1" may be used to indicate that no channel resources are allocated to the user equipment in another part of the bandwidth. There are two transmission modes of the above-mentioned secondary control signaling A. The first way is to adopt the CDM way. One way of implementing the CDM method is to modulate the secondary control signaling A with a sequence, and superimpose it on part or all of the subcarriers of the channel resource indicated by the primary control signaling. Another way is to use time division-frequency division multiplexing, that is, use part of the subcarriers of the channel resources indicated by the main control signaling to transmit the secondary control signaling A. Using secondary control signaling B to indicate the specific channel resource allocation status is similar to the first method described above, the difference is that in this method, when indicating specific channel resources, it is not necessary to indicate in another part There is no channel resource allocated to the user equipment in the bandwidth. Taking FIG. 4 as an example, the situation shown in FIG. 4 a is the situation when channel resources are allocated for user equipment in the 10 MHz bandwidth 406 . The resource block (data 402 ) allocated by the base station to the user equipment is partly in the 10MHz bandwidth 405 and partly in the 10MHz bandwidth 406 . The base station indicates in the main control signaling 401 the channel resource allocation status of the user equipment in the 10 MHz bandwidth 405 . In the channel resources indicated by the primary control signaling 401, the base station transmits secondary control signaling A (one-bit information) 403 to indicate that the base station has allocated resource blocks for the user equipment in the 10 MHz bandwidth 406, and transmits secondary control signaling B 404 Indicates the specific channel resource allocation status. The situation shown in FIG. 4 b is the situation when there is no channel resource allocated to the user equipment in the 10 MHz bandwidth 406 . The resource blocks (data 408 ) allocated by the base station to the user equipment are all in the 10MHz bandwidth 405 , and the base station indicates the channel resource allocation status of the user equipment in the 10MHz bandwidth 405 in the main control signaling 407 . The base station transmits secondary control signaling A (one-bit information) 404 in the channel resource indicated by the primary control signaling 401 to indicate that the base station does not allocate resource blocks for the user equipment in the 10 MHz bandwidth 406 .

The third way is applicable when the allocation of downlink localized channels by the base station is limited by continuous allocation. This limitation means that the base station only allocates continuous resource blocks to a specific user equipment to save downlink signaling overhead. A boundary resource block is defined as two adjacent resource blocks with partial bandwidth. As shown in FIG. 5 , a boundary resource block 504 is a resource block adjacent to another 10 MHz partial bandwidth 507 in the 10 MHz partial bandwidth 506 . Similarly, a border resource block 505 is a resource block adjacent to another 10 MHz part bandwidth 506 in the 10 MHz part bandwidth 507 . Under this restriction, when the channel resources indicated by the primary control signaling in step c) include boundary resource blocks, the base station uses the secondary control signaling to indicate the allocation of channel resources in another part of the bandwidth. When the channel resources indicated by the primary control signaling in step c) do not include boundary resource blocks, since the base station does not allocate data to the user equipment in another part of the bandwidth, the base station does not use the secondary control signaling to indicate the resource blocks in another part of the bandwidth. Channel resource allocation status. Taking FIG. 5 as an example, the situation shown in FIG. 5 a is the situation when border resource blocks are allocated in the 10 MHz partial bandwidth 507 . The resource block (data 502 ) allocated by the base station to the user equipment is partly in the 10MHz bandwidth 506 and partly in the 10MHz bandwidth 507 . The base station indicates in the main control signaling 501 the channel resource allocation status of the user equipment in the 10 MHz partial bandwidth 506 . Since the boundary resource block 504 is allocated in the partial bandwidth 506 , the base station indicates the specific channel resource allocation status in the secondary control signaling 503 . The situation shown in Fig. 5b is when no boundary resource blocks are allocated in the 10 MHz partial bandwidth 506. The resource blocks (data 509 ) allocated by the base station to the user equipment are all in the 10MHz partial bandwidth 506 and no border resource block 504 is allocated, so the base station does not need to use secondary control signaling to indicate the channel resource allocation status in another partial bandwidth.

In step e) of the present invention, the base station performs channel coding and transmits the primary control signaling and the secondary control signaling respectively.

Operation of user equipment:

a) The user equipment receives the main control signaling;

When the above-mentioned bandwidth supported by the user equipment is equal to the system bandwidth, the user equipment reads the secondary control signaling transmitted by the base station according to the position of the channel resource indicated by the primary control signaling, and obtains the channel resources in another part of the bandwidth through the secondary control signaling. Channel resource allocation status;

The above user equipment receives user data on resource blocks allocated by the base station.

In step a) of the present invention, the user equipment first receives the main control signaling on the corresponding resource. Corresponding to the user equipment that does not support the system bandwidth, the base station configures several control channels for transmitting main control signaling within its bandwidth; corresponding to the user equipment that supports the system bandwidth, the base station configures several transmission channels within the entire system bandwidth. The control channel of the main control signaling (usually one or more control channels are configured in each partial bandwidth). When the user equipment establishes a connection with the base station, the base station notifies the user equipment of the time-frequency resource where the control channel is located through high-layer signaling. The user equipment detects whether the network sends the main control signaling to it by detecting the control channel configured for it by the network.

In step b) of the present invention, when the secondary control signaling is multiplexed with other control information and then transmitted, it corresponds to the way that the base station adopts a fixed format. The user equipment reads the secondary control signaling according to a fixed format. Corresponding to the manner in which the base station adopts two formats, the user equipment respectively detects the control channel after the secondary control signaling and other information are multiplexed according to the two formats. After decoding according to one of the formats, if the cyclic redundancy check (Cyclic Redundance Check, hereinafter referred to as CRC) passes, the user equipment reads the secondary control signaling according to the format. That is, if the user equipment passes the CRC check after decoding according to the format of the non-transmitted secondary control signaling, the user equipment knows that the base station does not allocate resource blocks for it in another part of the bandwidth; If the format of the command is decoded and passes the CRC check, the user equipment knows that the base station has allocated resource blocks for it in another part of the bandwidth and the user equipment can obtain specific resource block allocation information through secondary control signaling.

In step b) of the present invention, corresponding to distributed channel transmission, when the base station uses one bit information in the secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth, the user equipment reads the bit information and obtains the Channel resource allocation status in another part of the bandwidth. For example, "0" is used to indicate that no channel resources are allocated to the user equipment in another part of the bandwidth, and "1" is used to indicate that channel resources are allocated to the user equipment in another part of the bandwidth. When the result of decoding the bit information of the user equipment is "0", the user equipment knows that the base station does not allocate resource blocks for it in another part of the bandwidth; and when the result of decoding the bit information of the user equipment is "1", The user equipment knows that the base station has allocated resource blocks to it in another part of the bandwidth, and the specific resource block allocation method is the same as that in the current part of the bandwidth.

比特的序列 $a_i,i=\mathrm{1,2},...\frac{N}{2M},$ 其中a_i＝0代表该资源块没有分配给该用户设备，而a_i＝1代表该资源块分配给该用户设备。用户设备在读取次控制信令后，通过a_i的值即可获取另一个部分带宽中具体的信道资源分配的状况。In step b) of the present invention, corresponding to the first mode of base station transmission of secondary control signaling in the partial channel transmission mode, when the bit mapping mode is used to indicate the status of channel resource allocation in another part of the bandwidth, it is assumed that in the system bandwidth There are N available subcarriers in total, one resource block contains M subcarriers in the frequency domain, and one

sequence of bits $a_i,i=\mathrm{1,2},...\frac{N}{2m},$ Where a _i =0 represents that the resource block is not allocated to the user equipment, and a _i =1 represents that the resource block is allocated to the user equipment. After reading the secondary control signaling, the user equipment can obtain the specific channel resource allocation status in another part of the bandwidth through the value of a _i .

In step b) of the present invention, corresponding to the second mode of the base station transmitting the secondary control signaling in the partial channel transmission mode, the user equipment first reads the secondary control signaling A (assuming that "0" is used in the secondary control signaling A) indicates that no channel resources are allocated to the user equipment in another part of the bandwidth, and "1" is used to indicate that channel resources are allocated to the user equipment in another part of the bandwidth). When the result of decoding the secondary control signaling A of the user equipment is "0", the user equipment knows that the base station does not allocate resource blocks for it in another part of the bandwidth; and when the result of decoding the secondary control signaling A of the user equipment is "0", 1", the user equipment knows that the base station has allocated resource blocks for it in another part of the bandwidth, and the user equipment needs to read the secondary control signaling B to obtain specific channel resource allocation information.

In step b) of the present invention, it corresponds to the third mode of base station transmission of secondary control signaling in the partial channel transmission mode, that is, when the base station only allocates continuous resource blocks to a specific user equipment, the user equipment judges the primary control signaling Whether the channel resources indicated by the signaling include boundary resource blocks. If the boundary resource block is not included, the base station does not allocate data to the user equipment in another part of the bandwidth. If the boundary resource block is included, the user equipment reads the secondary control signaling to acquire the channel resource allocation status in another part of the bandwidth.

In step c) of the present invention, the user equipment obtains the location information of the resource block allocated by the base station for it according to the information in the primary control signaling and the secondary control signaling, so as to receive data on the corresponding resource block.

As shown in FIG. 6 , in the device diagram of the base station scheduling resources and transmitting control signaling, the control signaling generator module 602 of the base station is an embodiment of the present invention. The scheduler module 601 of the base station determines how to allocate resource blocks to each user equipment according to the channel quality indication (CQI) of the user equipment, the bandwidth supported by the user equipment, and the data service information of the user equipment; the control signaling of the base station is generated The controller module 602 generates primary control signaling to indicate the channel resource allocation status in the part of the bandwidth it transmits according to the status of resource block allocation, and for user equipment that supports system bandwidth, generates secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth. channel resource allocation status; finally, the base station transmits the control signaling in the transmitting device 603 . The specific base station transmission hardware block diagram is given in the embodiment.

As shown in FIG. 7 , a device diagram of user equipment processing control signaling, the control signaling processor module 703 of the user equipment is an embodiment of the present invention. 701 The receiving device receives the radio frequency signal sent by the base station, performs radio frequency reception and analog-to-digital conversion and other processing, and then demultiplexes control signaling and other physical channels in the physical channel demultiplexer in module 702. In module 703, in the control signaling processor, when the bandwidth supported by the user equipment is equal to the system bandwidth, the user equipment reads the secondary control signaling transmitted by the base station according to the position of the channel resource indicated by the primary control signaling, and passes the secondary control signaling The signaling obtains the channel resource allocation status in another part of the bandwidth; then the user equipment receives user data on the resource block allocated by the base station. When the user equipment receives data, the module 703 controls the signaling processor to provide the information of the resource blocks allocated by the base station to the module 702 physical channel demultiplexer. The specific receiving hardware block diagram of the user equipment is given in the embodiment.

Example

This part gives three embodiments of the invention, and the embodiments focus on how to process and generate the primary control signaling and the secondary control signaling to indicate channel resource allocation. In order to avoid making the description of this patent too lengthy, in the following description, detailed descriptions of functions or devices that are well known to the public are omitted.

First embodiment:

In this embodiment, the downlink data is transmitted on a partial channel, and the base station directly indicates the channel resource allocation status in another part of the bandwidth in the secondary control signaling.

In this embodiment, the system bandwidth is 20 MHz, which is divided into two partial bandwidths B ₁ and B ₂ , each of which is 10 MHz. There are 1200 available subcarriers (excluding DC) in the 20MHz bandwidth, and one resource block includes 12 subcarriers in the frequency domain, so there are 50 resource blocks for each partial bandwidth. Corresponding to 100 resource blocks in the entire system, numbered as b _i , i=1, 2, ... 100, where B ₁ contains resource blocks 1, 2, ..., 50, and B ₂ contains The resource blocks are 51, 52, ..., 100. In a data transmission, the base station allocates resource blocks numbered as follows to a user equipment: 23, 24, 25, 26, 27, 45, 46, 47, 48, 49, 50, 51, 52, 53, 71, 72 , 73, 74. The base station selects a control channel in the part of bandwidth _B1 to send the main control signaling for the user equipment. It is set that the main control signaling uses bit mapping to indicate the allocation status of resource blocks, and then the main control signaling contains 50 bits to indicate the resources allocated for the user equipment in the partial bandwidth _B1 , where bits 23, 24, 25, 26, 27, 45, 46, 47, 48, 49, 50 are "1" indicating that the corresponding resource block is allocated to the user equipment, while the remaining bits are "0" indicating that the corresponding resource block is not allocated to the user device. The base station transmits the secondary control signaling on a specific time-frequency resource in the resource block allocated for the user equipment in the partial bandwidth _B1 . In this embodiment, it is set that the first resource block with the smallest number allocated by the base station is used to transmit the secondary control signaling, that is, the resource block 23 is used to transmit the secondary control signaling. The secondary control signaling also contains 50 bits to indicate the resources allocated for the user equipment in the part of bandwidth _B2 , where bits 1, 2, 3, 21, 22, 23, and 24 are "1" to indicate the corresponding resources The block is allocated to the user equipment, and the remaining bits are "0" indicating that the corresponding resource block is not allocated to the user equipment.

The operation of the user equipment is as follows. The user equipment first receives the main control signaling, and learns that the resource blocks allocated by the base station in the partial bandwidth _B1 are 23, 24, 25, 26, 27, 45, 46, 47, 48, 49, and 50 through bit mapping. Since the first resource block with the smallest number assigned by the base station is used to transmit the secondary control signaling, the user equipment reads the secondary control signaling in resource block 23, and learns that the base station allocates it in the partial bandwidth _B2 according to the bit mapping The resource blocks are 51, 52, 53, 71, 72, 73, 74. Thus, the user equipment can obtain all the information about the channel resources allocated by the base station, so as to perform the corresponding operation of receiving data.

Fig. 8 is an example of a hardware block diagram of a base station according to the present invention. As shown in the figure, the base station first generates primary control signaling (801) and secondary control signaling (805) according to the method of the present invention; then the base station equipment performs channel coding and interleaving (802) on the primary control signaling; rate matching (803 ); Next, carry out QAM modulation (804) to signal, then input multiplexer (813); Base station equipment carries out channel coding and interleaving (806) to sub-control signaling; Rate matching (807); Then carry out QAM to signal Modulation (808), then input to the multiplexer (813); the base station performs channel coding and interleaving (810) on the currently scheduled user's data (809); then performs rate matching (811); then performs QAM on the data signal Modulate (812), and input multiplexer (813); Perform OFDM modulation (FFT) on the signal (814), add cyclic prefix (815), digital/analog conversion (816), and finally transmit through radio frequency transmitter (817) and antenna (818). On the other hand, the base station receives the signal sent by the user equipment through the antenna (818) and the radio frequency receiver (819); through the analog/digital conversion (820); removes the cyclic prefix (821); performs SCFDMA demodulation (822); after demodulation The signal input demultiplexer (823); according to the corresponding control signaling, the base station performs QAM demodulation (824) to the data signal output by the demultiplexer, de-rate matching (825), de-interleaving and channel decoding ( 826), and finally obtain the data of each user (827); the base station performs QAM demodulation (828) on the uplink control signal output by the demultiplexer, and performs corresponding processing to obtain information such as CQI (829), and these uplink control signaling , including CQI, etc., is the basis for the base station to schedule users.

Fig. 9 is an example of a hardware block diagram of a user equipment according to the present invention. The user equipment receives the signal from the base station through the antenna (912) and the radio frequency receiver (913), undergoes analog/digital conversion (914), removes the cyclic prefix (915), performs OFDM demodulation (FFT) (916) and inputs the demultiplexed user equipment (917); the user equipment performs QAM demodulation (922), de-rate matching (923), de-interleaving and channel decoding (924) on the control signal output by the demultiplexer (917), thereby obtaining the Main control signaling (925); the user equipment performs QAM demodulation (926), de-rate matching (927), de-interleaving and channel decoding (928) on the control signal output by the demultiplexer (917), thereby obtaining the base station The sent secondary control signaling (929); the user receives and analyzes the primary control signaling (925) and the secondary control signaling (929) to obtain the channel resource status allocated by the base station, and then the user equipment sends the output of the demultiplexer Perform QAM demodulation (918), de-rate matching (919), de-interleaving and channel decoding (920) on the data signal sent to it, and finally obtain the data sent to it by the base station (921). On the other hand, when the base station schedules the user equipment to transmit data, the user equipment performs channel coding and interleaving (904), rate matching (905), QAM modulation (906) on its data (903), and inputs it to its channel multiplexer (907 ); the user equipment's uplink control signaling (901), CQI, etc., perform QAM modulation (902) after corresponding processing, and also input to the channel multiplexer (907); the user equipment performs SCFDMA modulation on the multiplexed signal (908), adding cyclic prefix (909), analog/digital conversion (910), and finally transmitting through radio frequency transmitter (911) and antenna (912).

Second embodiment:

In this embodiment, the downlink data is transmitted using distributed channels, and the base station uses one bit of information in the secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth.

In this embodiment, still taking the system bandwidth of 20 MHz as an example, it is divided into two partial bandwidths B ₁ and B ₂ , each of which is 10 MHz. There are 1200 available subcarriers (excluding DC) in the 20MHz bandwidth, and a distributed resource block includes 12 distributed subcarriers in each partial bandwidth, so there are 50 resource blocks for each partial bandwidth. Corresponding to 100 distributed resource blocks in the whole system, numbered as b _i , i=1, 2, ... 100, wherein B ₁ contains resource blocks 1, 2, ..., 50, and B ₂ The resource blocks contained are 51, 52, ..., 100. In order to reduce the signaling overhead during distributed transmission as much as possible, it is set that the network adopts the method of assigning consecutive resource block numbers in each part of the bandwidth when allocating distributed channels (the resource blocks with consecutive numbers can be allocated in the frequency domain by mapping The upper distance is relatively long, so that the effect of frequency domain diversity can be utilized to the maximum extent). In this embodiment, corresponding to the distributed transmission, it is stipulated that if the network allocates data to the user equipment in each partial bandwidth, the positions of channel resources allocated in each partial bandwidth are the same.

个比特(其中

代表对x进行向上取整操作)来指示部分带宽B₁中为该用户设备分配的资源，其中6个比特指示资源块的起始编号(在本实施例中为23)，另外6个比特指示资源块的结束编号(在本实施例中为27)。基站在部分带宽B₁中为该用户设备分配的资源块中在特定的时频资源上传输次控制信令。在本实施例中采用时域-频域复用的方式来传输次控制信令，即规定在数据传输的第一个OFDM符号内的基站分配的编号最小的第一个资源块来传输次控制信令，即用资源块23来传输次控制信令。次控制信令用“0”来指示在另一个部分带宽中没有为该用户设备分配信道资源，而用“1”来指示在另一个部分带宽中为该用户设备分配信道资源。在本实施例中，次控制信令中传输“1”表明部分带宽B₂中为该用户设备分配了信道资源。用户设备的操作如下所述。用户设备首先接收主控制信令，通过资源块的起始编号和结束编号获知基站在部分带宽B₁中为其分配的资源块为23，24，25，26，27，28。由于用基站分配的编号最小的第一个资源块来传输次控制信令，用户设备在数据传输的第一个OFDM符号内的资源块23中读取次控制信令，并根据次控制信令中传输了“1”获知基站在部分带宽B₂中为其分配的资源块为73，74，75，76，77，78。用户设备由此可以获得基站为其分配的信道资源的全部信息，从而可以进行相应的接收数据的操作。In one data transmission, the base station allocates resource blocks numbered as follows to a user equipment: 23, 24, 25, 26, 27, 28, 73, 74, 75, 76, 77, 78. The base station selects a control channel in the part of bandwidth _B1 to send the main control signaling for the user equipment. Since consecutive resource block numbers are allocated within each partial bandwidth, one way of indicating resource block allocation is to indicate the start and end numbers of the allocated resource blocks. In this way, the main control signaling needs to use

bits (of which

represents the round-up operation of x) to indicate the resources allocated for the user equipment in the partial bandwidth B ₁ , where 6 bits indicate the starting number of the resource block (23 in this embodiment), and the other 6 bits indicate The end number of the resource block (27 in this embodiment). The base station transmits the secondary control signaling on a specific time-frequency resource in the resource block allocated for the user equipment in the partial bandwidth _B1 . In this embodiment, time domain-frequency domain multiplexing is used to transmit secondary control signaling, that is, the first resource block with the smallest number assigned by the base station in the first OFDM symbol of data transmission is specified to transmit secondary control signaling. Signaling, that is, the resource block 23 is used to transmit secondary control signaling. The secondary control signaling uses "0" to indicate that no channel resources are allocated to the user equipment in another part of the bandwidth, and uses "1" to indicate that channel resources are allocated to the user equipment in another part of the bandwidth. In this embodiment, the transmission of "1" in the secondary control signaling indicates that channel resources are allocated to the user equipment in the part of the bandwidth _B2 . The operation of the user equipment is as follows. The user equipment first receives the main control signaling, and learns that the resource blocks allocated by the base station in the partial bandwidth _B1 are 23, 24, 25, 26, 27, and 28 through the start number and end number of resource blocks. Since the first resource block with the smallest number assigned by the base station is used to transmit the secondary control signaling, the user equipment reads the secondary control signaling in the resource block 23 in the first OFDM symbol of data transmission, and according to the secondary control signaling "1" is transmitted in , and it is learned that the resource blocks allocated by the base station in part of the bandwidth _B2 are 73, 74, 75, 76, 77, and 78. Thus, the user equipment can obtain all the information about the channel resources allocated by the base station, so as to perform the corresponding operation of receiving data.

It is assumed that in another data transmission, the base station allocates resource blocks numbered as follows to a user equipment: 22, 23, 24, 25, 26, 27, 28, 29, 30. The base station selects a control channel in the part of bandwidth _B1 to send the main control signaling for the user equipment. In the main control signaling, 12 bits are used to indicate the resource allocated for the user equipment in the partial bandwidth B ₁ , wherein 6 bits indicate the starting number of the resource block (22 in this embodiment), and the other 6 bits indicate The end number of the resource block (30 in this embodiment). The base station transmits the secondary control signaling on a specific time-frequency resource in the resource block allocated for the user equipment in the partial bandwidth _B1 . In this embodiment, time domain-frequency domain multiplexing is used to transmit secondary control signaling, that is, the first resource block with the smallest number assigned by the base station in the first OFDM symbol of data transmission is specified to transmit secondary control signaling. Signaling, that is, the resource block 22 is used to transmit secondary control signaling. In this embodiment, the transmission of "0" in the secondary control signaling indicates that no channel resources are allocated to the user equipment in the part of the bandwidth _B2 . The operation of the user equipment is as follows. The user equipment first receives the main control signaling, and learns that the resource blocks allocated by the base station in the partial bandwidth _B1 are 22, 23, 24, 25, 26, 27, 28, 29 through the start number and end number of the resource block. 30. Since the first resource block with the smallest number assigned by the base station is used to transmit the secondary control signaling, the user equipment reads the secondary control signaling in the resource block 22 in the first OFDM symbol of data transmission, and according to the secondary control signaling “0” is transmitted in , knowing that the base station has no resource blocks allocated to it in the part of the bandwidth _B2 . Thus, the user equipment can obtain all the information about the channel resources allocated by the base station, so as to perform the corresponding operation of receiving data.

Third embodiment:

In this embodiment, the downlink data is transmitted using a localized channel, and the base station only allocates continuous resource blocks to a specific user equipment.

In this embodiment, still taking the system bandwidth of 20 MHz as an example, it is divided into two partial bandwidths B ₁ and B ₂ , each of which is 10 MHz. There are 1200 available subcarriers (excluding DC) in the 20MHz bandwidth, and one resource block includes 12 subcarriers in the frequency domain, so there are 50 resource blocks for each partial bandwidth. Corresponding to 100 resource blocks in the entire system, numbered as b _i , i=1, 2, ... 100, where B ₁ contains resource blocks 1, 2, ..., 50, and B ₂ contains The resource blocks are 51, 52, ..., 100.

个比特来指示部分带宽B₁中为该用户设备分配的资源，其中6个比特指示资源块的起始编号(在本实施例中为23)，另外6个比特指示资源块的结束编号(在本实施例中为31)。由于分配的信道资源不包括边界资源块50，因此基站不需要用次控制信令来指示另一个部分带宽中的信道资源分配状况。用户设备的操作如下所述。用户设备首先接收主控制信令，通过资源块的起始编号和结束编号获知基站在部分带宽B₁中为其分配的资源块为23，24，25，26，27，28，29，30，31。由于分配的信道资源不包括边界资源块50，用户设备获知基站没有在部分带宽B₂中为用户设备分配数据。用户设备由此可以获得基站为其分配的信道资源的全部信息，从而可以进行相应的接收数据的操作。It is assumed that in one data transmission, the base station allocates resource blocks numbered as follows to a user equipment: 23, 24, 25, 26, 27, 28, 29, 30, 31. The base station selects a control channel in the part of bandwidth _B1 to send the main control signaling for the user equipment. Since resource blocks are allocated consecutively, one way of indicating resource block allocation is to indicate the start and end numbers of the allocated resource blocks. In this way, the main control signaling needs to use

bits to indicate the resources allocated for the user equipment in the partial bandwidth _B1 , wherein 6 bits indicate the start number of the resource block (23 in this embodiment), and the other 6 bits indicate the end number of the resource block (in In this embodiment it is 31). Since the allocated channel resources do not include the boundary resource block 50, the base station does not need to use secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth. The operation of the user equipment is as follows. The user equipment first receives the main control signaling, and learns that the resource blocks allocated by the base station in the partial bandwidth _B1 are 23, 24, 25, 26, 27, 28, 29, 30 through the start number and end number of the resource block. 31. Since the allocated channel resource does not include the boundary resource block 50, the user equipment knows that the base station does not allocate data to the user equipment in the part of the bandwidth _B2 . Thus, the user equipment can obtain all the information about the channel resources allocated by the base station, so as to perform the corresponding operation of receiving data.

It is assumed that in another data transmission, the base station allocates the following numbered resource blocks to a user equipment: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58. The base station selects a control channel in the part of bandwidth _B1 to send the main control signaling for the user equipment. In the main control signaling, 12 bits need to be used to indicate the resources allocated for the user equipment in the partial bandwidth _B1 , wherein 6 bits indicate the starting number of the resource block (41 in this embodiment), and the other 6 bits Indicates the end number of the resource block (50 in this embodiment). Since the allocated channel resources include the boundary resource block 50, the base station needs to use secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth. The base station transmits the secondary control signaling on a specific time-frequency resource in the resource block allocated for the user equipment in the partial bandwidth _B1 . In this embodiment, it is set that the first resource block with the smallest number allocated by the base station is used to transmit the secondary control signaling, that is, the resource block 41 is used to transmit the secondary control signaling. In the secondary control signaling, only 6 bits need to be used to indicate the end number of the resource block (8 in this embodiment) to indicate the resources allocated for the user equipment in the partial bandwidth _B2 . The operation of the user equipment is as follows. The user equipment first receives the main control signaling, and learns that the resource blocks allocated by the base station in the partial bandwidth _B1 are 41, 42, 43, 44, 45, 46, 47, 48 through the start number and end number of the resource block. 49, 50. Since the allocated channel resource includes the boundary resource block 50, the user equipment knows that the base station has allocated data for the user equipment in the part of the bandwidth _B2 . Since the first resource block with the smallest number assigned by the base station is used to transmit the secondary control signaling, the user equipment reads the secondary control signaling in resource block 41, and learns that the base station is in the partial bandwidth _B2 according to the end number of the resource block again The allocated resource blocks are 51, 52, 53, 54, 55, 56, 57, and 58. Thus, the user equipment can obtain all the information about the channel resources allocated by the base station, so as to perform the corresponding operation of receiving data.

Although the present invention has been illustrated in conjunction with the preferred embodiments thereof, those skilled in the art will understand that various modifications, substitutions and alterations can be made to the present invention without departing from the spirit and scope of the invention. Accordingly, the invention should not be limited by the above-described embodiments, but by the appended claims and their equivalents.

Claims (29)

1. A method for transmitting control signaling in a wireless communication system, comprising steps: a) corresponding to the deployment situation in which the system bandwidth in the wireless communication system is greater than the bandwidth supported by some user equipments, the base station in the wireless communication system divides its system bandwidth into two partial bandwidths; b) the base station allocates resource blocks to each user equipment; c) For each user equipment, the base station transmits corresponding main control signaling of channel resource allocation in a partial bandwidth; d) When the bandwidth supported by the user equipment is equal to the system bandwidth, in the channel resources indicated by the primary control signaling, the base station transmits secondary control signaling corresponding to the user equipment to indicate another partial bandwidth The channel resource allocation status in ; e) The base station sends control signaling including primary control signaling and secondary control signaling. 2. The method according to claim 1, wherein in step b), resource block allocation is based on the channel quality indication of the user equipment, the bandwidth supported by the user equipment, and the data service information of the user equipment. 3. The method according to claim 1, characterized in that said channel resource allocation is suitable for downlink partial channel transmission. 4. According to claim 1, characterized in that said channel resource allocation is suitable for downlink distributed channel transmission. 5. The method according to claim 1, wherein in step c), corresponding to the user equipment that does not support the system bandwidth, the base station selects a control channel within the bandwidth of the user equipment to transmit the main control signaling. 6. The method according to claim 1, characterized in that in step c), corresponding to the user equipment supporting the system bandwidth, when all the resource blocks allocated by the base station for the user equipment in step b) are in a certain part When the bandwidth is medium, the base station selects a control channel within this part of the bandwidth to transmit the main control signaling. 7. The method according to claim 1, characterized in that in step c), corresponding to the user equipment supporting the system bandwidth, when the part of resource blocks allocated by the base station to the user equipment in step b) is in the part bandwidth _B1 When other resource blocks are in the partial bandwidth _B2 , the base station selects a control channel in the partial bandwidth _B1 or partial bandwidth _B2 according to a certain criterion to transmit the main control signaling. 8. The method according to claim 7, wherein the criterion for the base station to select part of the bandwidth is that the base station selects a part of the bandwidth that transmits relatively more resource blocks to transmit control signaling for channel resource allocation. 9. The method according to claim 1, characterized in that in step d), for distributed channel transmission, the base station uses one bit information in the secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth. 10. The method according to claim 9, characterized in that "0" is used to indicate that no channel resource is allocated to the user equipment in another part of the bandwidth, and "1" is used to indicate that the channel resource is not allocated to the user equipment in another part of the bandwidth. The user equipment allocates channel resources. 11. The method according to claim 9, wherein "0" is used to indicate that channel resources are allocated to the user equipment in another part of the bandwidth, and "1" is used to indicate that no channel resources are allocated to the user equipment in another part of the bandwidth. The user equipment allocates channel resources. 12. The method according to claim 9, characterized in that the one-bit information is transmitted in the channel resource indicated in step c) by means of code division multiplexing. 13. The method according to claim 9, characterized in that the one-bit information is transmitted in the channel resource indicated in step c) by means of time division-frequency division multiplexing. 14. The method according to claim 1, wherein in step d), for localized channel transmission, said secondary control signaling directly indicates channel resource allocation status in another partial bandwidth. 15. The method according to claim 14, characterized in that the bitmap of channel resource allocation is used to indicate the channel resource allocation status in another part of the bandwidth. 16. The method according to claim 1, characterized in that in step d), for localized channel transmission, the base station indicates whether the user is in another part of the bandwidth by using one bit of information as the secondary control signaling A The device allocates channel resources, and when the one-bit information indicates that the user equipment is allocated channel resources in another part of the bandwidth, a separate secondary control signaling B is used to indicate the specific channel resource allocation status. 17. The method according to claim 16, characterized in that for the secondary control signaling A, "0" is used to indicate that no channel resource is allocated to the user equipment in another part of the bandwidth, and "1" is used to indicate that channel resources are allocated to the user equipment in another part of the bandwidth. 18. The method according to claim 16, characterized in that for the secondary control signaling A, "0" is used to indicate that channel resources are allocated to the user equipment in another part of the bandwidth, and "1" is used to indicate Indicates that no channel resources are allocated to the user equipment in another part of the bandwidth. 19. The method according to claim 16, characterized in that the secondary control signaling A is transmitted in the channel resource indicated in step c) by means of code division multiplexing. 20. The method according to claim 16, characterized in that the secondary control signaling A is transmitted in the channel resource indicated in step c) by means of time division-frequency division multiplexing. 21. The method according to claim 16, wherein the main control signaling indicates the channel resource allocation status through the start number and end number of the resource block. 22. The method according to claim 16, characterized in that the secondary control signaling indicates the channel resource allocation status through the end number of the resource block. 23. The method according to claim 1, characterized in that in step d), for localized channel transmission, when the base station only allocates continuous resource blocks to a specific user equipment, when in step c) the main When the channel resources indicated by the control signaling include boundary resource blocks, the base station uses the secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth. 24. The method according to claim 1, characterized in that in step d), for localized channel transmission, when the base station only allocates continuous resource blocks to a specific user equipment, when in step c) the main When the channel resources indicated by the control signaling do not include boundary resource blocks, the base station does not use secondary control signaling to indicate the channel resource allocation status in another part of the bandwidth. 25. The method according to claim 1, characterized in that in step d), when the secondary control signaling is multiplexed with other control information and then transmitted, its transmission format is fixed. 26. The method according to claim 1, characterized in that in step d), when the secondary control signaling is multiplexed with other control information and then transmitted, its transmission format is two: when the base station is in another part of the bandwidth When channel resources are allocated to user equipment, the multiplexed control signaling includes secondary control signaling indicating channel resource allocation status in another part of the bandwidth, as well as other control information; when the base station does not provide user equipment in another part of the bandwidth When the device allocates channel resources, the multiplexed control signaling only contains other control information. 27. A method for user equipment to receive control signaling, where the control signaling includes primary control signaling and secondary control signaling, the method comprising the following steps: a) The user equipment receives the main control signaling; b) When the bandwidth supported by the user equipment is equal to the system bandwidth, the user equipment reads the secondary control signaling transmitted by the base station according to the position of the channel resource indicated by the primary control signaling, and obtains another part through the secondary control signaling Channel resource allocation status in the bandwidth; c) The user equipment receives user data on resource blocks allocated by the base station. 28. A device for generating control signaling on the base station side, comprising a transmitting part, further comprising: A scheduler module, configured to determine how to allocate resource blocks to each user equipment according to the channel quality indicator CQI of the user equipment, the bandwidth supported by the user equipment, and the data service information of the user equipment; A control signaling generator module, configured to generate primary control signaling to indicate the channel resource allocation status in the part of the bandwidth it transmits according to the status of resource block allocation, and for user equipment supporting system bandwidth, generate secondary control signaling to indicate Indicates the channel resource allocation status in another part of the bandwidth; Wherein, the transmitting device transmits the control signaling including the primary control signaling and the secondary control signaling into the wireless channel. 29. A device for processing control signaling on a user equipment side, comprising a receiving part, further comprising: A physical channel demultiplexer, configured to demultiplex control signaling including primary control signaling and secondary control signaling, and other physical channels from received signals; The control signaling processor is configured to read the secondary control signaling transmitted by the base station according to the position of the channel resource indicated by the primary control signaling when the bandwidth supported by the user equipment is equal to the system bandwidth, and pass the secondary control signaling Obtain the channel resource allocation status in another part of the bandwidth; Wherein, the receiving device receives the radio frequency signal sent by the base station, performs radio frequency reception and analog-to-digital conversion and other processing, and transmits it to the physical channel demultiplexer.

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