CN103618591A - Method, device and system for data transmission - Google Patents
Method, device and system for data transmission Download PDFInfo
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Abstract
The embodiment of the invention provides a method, device and system for data transmission, and relates to the technical field of communication. The method, device and system are used for improving utilization efficiency of frequency resources. The method for data transmission includes the steps that network side equipment determines service carrier waves which are sent to a terminal and belong to downlink data, wherein the service carrier waves comprise conventional bandwidth carrier waves and small bandwidth carrier waves; the downlink data are sent to the terminal through the conventional bandwidth carrier waves and the small bandwidth carrier waves. The method, device and system are suitable for downlink data transmission scenes.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for data transmission.
Background
With the development of information technology, the service types of mobile terminals are increasing, for example: common high-definition online videos, video sharing, high-definition video calls and the like; these services are increasing, but the available frequency resources are limited.
Currently, the multi-carrier technology in UMTS (Universal Mobile Telecommunications System) uses aggregation of multiple carriers with conventional bandwidth, i.e. carriers of 5MHz, after which the transmission bandwidth of one user is an integer multiple of 5MHz, such as 10MHz, 15MHz and 20 MHz.
However, the frequency resources in the UMTS System are not always 5MHz or an integer multiple of 5MHz, some scattered small-bandwidth frequencies are always generated in the System, and when frequency resources cleaned up after the previous generation communication System gradually moves back to the network are used for the deployment of the new generation System, some scattered frequency resources often appear, for example, in GSM (Global System for mobile communication), the carrier bandwidth is 200KHz, according to the development of the current communication technology, the number of users in the GSM network is continuously reduced within 10 years, and then the frequency resources left out by GSM can be applied to the UMTS System.
Therefore, the number of the small-bandwidth frequency resources in the UMTS system is increased, but the small-bandwidth frequency resources cannot be reasonably utilized, so that the utilization efficiency of the frequency resources is low, and the resource waste is greatly caused.
Disclosure of Invention
Embodiments of the present invention provide a method, an apparatus, and a system for data transmission, so as to improve utilization efficiency of frequency resources.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides a data transmission method, which comprises the following steps:
the method comprises the steps that network side equipment determines service carriers for sending downlink data to a terminal, wherein the service carriers comprise conventional bandwidth carriers and small bandwidth carriers; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz;
and sending downlink data to the terminal through the conventional bandwidth carrier and the small bandwidth carrier.
The embodiment of the invention provides a data transmission method, which comprises the following steps:
a terminal sends service type information to network side equipment and the terminal monitors the signal quality of each carrier, so that the network side equipment determines service carriers, wherein the service carriers comprise conventional bandwidth carriers and small bandwidth carriers; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz; the service type information comprises the service of the terminal and the service quality grade of the service;
and receiving downlink data sent by the network side equipment through the conventional bandwidth carrier and the small bandwidth carrier.
Accordingly, an embodiment of the present invention provides a network-side device, where the network-side device includes: a determining unit and a transmitting unit;
the determining unit is configured to determine a service carrier for sending downlink data to the terminal, where the service carrier includes a normal bandwidth carrier and a small bandwidth carrier; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz;
the sending unit is configured to send downlink data to the terminal through the normal bandwidth carrier and the small bandwidth carrier.
Accordingly, an embodiment of the present invention provides a terminal, where the terminal includes: a first transmitting unit and a receiving unit;
the first sending unit is configured to send service type information to a network side device and the terminal monitors the signal quality of each carrier, so that the network side device determines a service carrier, where the service carrier includes a normal bandwidth carrier and a small bandwidth carrier; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz; the service type information comprises the service of the terminal and the service quality grade of the service;
the receiving unit is configured to receive downlink data sent by the network side device through the normal bandwidth carrier and the small bandwidth carrier.
The embodiment of the invention provides a data transmission system, which comprises network side equipment and a terminal, wherein the network side equipment is the network side equipment, and the terminal is the terminal.
The embodiment of the invention provides a method, a device and a system for data transmission, wherein a small bandwidth carrier and a conventional bandwidth carrier are determined as service carriers by network side equipment, and downlink data is sent to a terminal by the small bandwidth carrier and the conventional bandwidth carrier.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1(a) illustrates a method for data transmission according to an embodiment of the present invention;
fig. 1(b) illustrates a method for data transmission according to an embodiment of the present invention;
fig. 2 is another method for data transmission according to an embodiment of the present invention;
fig. 3 is a network side device according to an embodiment of the present invention;
fig. 4 is another network-side device according to an embodiment of the present invention;
fig. 5 is a terminal according to an embodiment of the present invention;
fig. 6 is another terminal according to an embodiment of the present invention;
fig. 7 is a system for data transmission according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
An embodiment of the present invention provides a method for data transmission, where an execution subject of the method is a network side device, such as a base station, as shown in fig. 1(a), the method includes the following steps 101 and 102;
101. the method comprises the steps that network side equipment determines service carriers for sending downlink data to a terminal, wherein the service carriers comprise conventional bandwidth carriers and small bandwidth carriers; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz;
102. and sending downlink data to the terminal through the conventional bandwidth carrier and the small bandwidth carrier.
The embodiment of the invention provides a data transmission method, which is characterized in that a small-bandwidth carrier and a conventional-bandwidth carrier are determined as service carriers by network side equipment, downlink data are sent to a terminal by the small-bandwidth carrier and the conventional-bandwidth carrier, and compared with the condition that only the conventional carrier is adopted in the prior art, the embodiment of the invention utilizes the small-bandwidth frequency resources in a network side equipment system, and improves the utilization efficiency of the frequency resources.
An embodiment of the present invention provides a method for data transmission, where an execution subject of the method is a terminal, and as shown in fig. 1(b), the method includes:
111. a terminal sends service type information to network side equipment and the terminal monitors the signal quality of each carrier, so that the network side equipment determines service carriers, wherein the service carriers comprise conventional bandwidth carriers and small bandwidth carriers; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz; the service type information comprises the service of the terminal and the service quality grade of the service;
112. and receiving downlink data sent by the network side equipment through the conventional bandwidth carrier and the small bandwidth carrier.
The embodiment of the invention provides a data transmission method, which is characterized in that service type information is sent to network side equipment and the signal quality of each carrier wave is monitored by a terminal, so that the network side equipment determines a service carrier wave, and downlink data sent by the network side equipment is received by a conventional bandwidth carrier wave and a small bandwidth carrier wave.
Example two
The embodiment of the present invention provides a method for data transmission, which is described in more detail in the first embodiment of the present invention, and the method includes:
201. the terminal initiates a service and establishes an RRC (Radio resource control) connection with a network side device, so as to obtain a service carrier determined by the network side device, where the service carrier determined by the network side device is used for carrying downlink data of the service.
202. The terminal sends capability information to network side equipment, and the capability information reflects the information of the small bandwidth carrier supported by the terminal. It should be noted that step 202 is not required to be executed each time the terminal initiates a service, and when the terminal initiates a concurrent service, the step 201 starts to establish a new RRC connection, which may omit step 202, for example, the terminal logs in again when making a call, and after initiating a second service to log in, the network side device also retains information whether the terminal supports the small bandwidth carrier, so that step 202 is not required to be executed.
In the embodiment of the present invention, the capability information includes an indication of whether the small bandwidth carrier is supported, a bandwidth size of the small bandwidth carrier supported by the terminal, a frequency band in which the small bandwidth carrier supported by the terminal is located, and a number of the small bandwidth carriers supported by the terminal; the capability information reflects the situation of the small carriers supported by the terminal, for example, the network side device generates a small bandwidth carrier of 2.5Mhz, but the bandwidth size of the small bandwidth carrier supported by the terminal is 1.25Mhz, so that the network side device determines that the terminal does not support the small bandwidth carrier provided by the network device in the following step 203.
The embodiment of the invention is suitable for a UMTS system, and the network side equipment in the embodiment of the invention comprises a base station and a wireless network controller.
203. The network side equipment judges whether the terminal supports the small bandwidth carrier or not according to the capability information; if the determination result is yes, executing 205, and if the determination result is no, executing 204; in the embodiment of the present invention, the small bandwidth carrier is a carrier less than 5Mhz, and the small bandwidth carrier is generated by changing the chip rate and/or the frame length of the system. Specifically, if the conventional carrier in the network side device is 5Mhz, the chip rate of the system is 3.84Mcps, and the frame length is 10ms, if the chip rate is changed to 1.92Mcps, a small bandwidth carrier of 2.5Mhz will be generated; if the frame length is changed to 20ms, a small bandwidth carrier of 2.5Mhz is also generated.
204. And the network side equipment sends downlink data to the terminal through the conventional bandwidth carrier.
205. A terminal sends service type information to network side equipment and the terminal monitors the signal quality of each carrier; the service type information comprises the service of the terminal and the service quality grade of the service; the signal quality of each carrier comprises a pilot signal quality; in the embodiment of the invention, each carrier can be monitored by the terminal to provide each service carrier for the network side equipment.
206. The network side equipment judges whether to use the small bandwidth carrier to send downlink data to the terminal according to the service type information of the terminal and the information influencing the data transmission quality; the information affecting the data transmission quality comprises the signal quality of each carrier monitored by the terminal and the load condition of each carrier monitored by the network side equipment; for example, the service of the terminal is a voice service, and if the signal quality of each carrier monitored by the terminal is better, the network side device selects a small bandwidth carrier and a conventional bandwidth carrier to send data; for another example, if the service of the terminal is a voice service, and the signal quality of the terminal monitoring small-bandwidth carrier is poor, the network side device selects a conventional carrier to send data; for another example, when the network side device monitors that the load condition of each conventional carrier is medium or heavy, a small bandwidth carrier is also used for transmitting data during data transmission so as to share the load of the conventional carrier; for another example, when the terminal monitors that the signal quality of a small bandwidth carrier is poor, the small bandwidth carrier is not used and other small bandwidth carriers with better signal quality are selected when transmitting data. It can be seen that, in the embodiments of the present invention, by integrating various information related to the service type information and the information affecting the data transmission quality, on one hand, the load between each carrier can be balanced, and on the other hand, the combination of the small bandwidth carrier and the conventional bandwidth carrier can be effectively utilized, thereby achieving higher spectrum utilization efficiency.
In the embodiment of the invention, each small bandwidth carrier can be used by a plurality of terminals, so that the resources are used by the best user as soon as possible, and the resources are utilized to the maximum extent from the aspect of time.
If the determination result in step 206 is yes, the following step 207 is executed, and if the determination result is no, the step 204 is executed.
207. Acquiring a conventional bandwidth carrier and a small bandwidth carrier from the frequency resources of the network side equipment and/or other network side equipment; in the embodiment of the present invention, information that affects data transmission quality in a data sending process is fully considered, for example, when a terminal is located at an edge of a cell, if signal quality of a small bandwidth carrier monitored by the terminal is poor, a network side device may obtain the use of the small bandwidth carrier from network frequency resources of other network side devices, if signal quality of a conventional carrier monitored by the terminal is poor, the use of the conventional carrier may also be obtained from network frequency resources of other network side devices, and even a service carrier provided by the network side device for the terminal may be obtained from other network side devices.
208. And the network side equipment determines the conventional bandwidth carrier and the small bandwidth carrier as the service carrier.
In the embodiment of the present invention, the number of the conventional bandwidth carriers and the number of the small bandwidth carriers are at least one, and the conventional bandwidth carriers and the small bandwidth carriers may be located in different frequency bands, may also be located in the same frequency band, and may also be located in the same frequency band, or may be adjacent carriers or non-adjacent carriers.
After the network side device determines the conventional bandwidth carrier and the small bandwidth carrier as the service carrier, the downlink data is sent to the terminal through the following steps 209 to 212:
209. in the first scheduling period, the terminal feeds back the signal quality of each carrier monitored by the terminal in the current scheduling period to the network equipment.
210. The network equipment distributes downlink data to the conventional bandwidth carrier and the small bandwidth carrier according to the information which influences the data transmission quality in the current scheduling period;
loading the downlink data allocated to the conventional bandwidth carrier on the conventional bandwidth carrier, and sending the downlink data to the terminal; the downlink data allocated to the small bandwidth carrier is loaded on the small bandwidth carrier and sent to the terminal;
211. in a non-first scheduling period, the terminal feeds back the signal quality of each carrier monitored by the terminal in the current scheduling period and the data receiving condition information in the last scheduling period to the network equipment;
212. the network equipment allocates downlink data to the conventional bandwidth carrier and the small bandwidth carrier according to the information affecting the data transmission quality in the current scheduling period and the data receiving condition information in the last scheduling period fed back by the terminal; for example, in the second scheduling period, the terminal feeds back to the network side device that the signal quality of the current conventional bandwidth carrier is poor, the signal quality of the small bandwidth carrier is poor, and no data is received on the small bandwidth carrier in the first scheduling period, and in the second scheduling period, the network side device reallocates the downlink data to the conventional bandwidth carrier and the small bandwidth carrier according to the information.
Loading the downlink data allocated to the conventional bandwidth carrier on the conventional bandwidth carrier, and sending the downlink data to the terminal; and the downlink data allocated to the small bandwidth carrier is carried on the small bandwidth carrier and sent to the terminal.
It is noted that, for simplicity of explanation, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will appreciate that the present invention is not limited by the order of acts, as some steps may, in accordance with the present invention, occur in other orders and/or concurrently.
The embodiment of the invention provides a data transmission method, which comprises the steps that a network side device determines a small bandwidth carrier and a conventional bandwidth carrier as service carriers, and sends downlink data to a terminal through the small bandwidth carrier and the conventional bandwidth carrier, compared with the condition that only the conventional carrier is adopted in the prior art, the embodiment of the invention utilizes the small bandwidth frequency resource in a network side device system, and improves the utilization efficiency of the frequency resource; furthermore, various factors of terminal service type information and information influencing data transmission quality are comprehensively considered, so that the service transmission quality is ensured, and the load among carriers is balanced.
EXAMPLE III
As shown in fig. 3, an embodiment of the present invention provides a network-side device 10, where the network-side device 10 includes: a determination unit 11 and a transmission unit 12;
the determining unit 11 is configured to determine a service carrier for sending downlink data to the terminal, where the service carrier includes a normal bandwidth carrier and a small bandwidth carrier; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz;
the sending unit 12 is configured to send downlink data to the terminal through the normal bandwidth carrier and the small bandwidth carrier.
Further, as shown in fig. 4, the network-side device 10 further includes a determining unit 13;
the judging unit 13 is configured to judge whether the terminal supports the small bandwidth carrier according to the capability information of the terminal; the capability information reflects information of a small bandwidth carrier supported by the terminal;
the determining unit 11 is further configured to determine a serving carrier for sending downlink data to the terminal when the determining unit 13 determines that the terminal supports the small bandwidth carrier.
Preferably, the determining unit 13 is further configured to determine whether to use the small bandwidth carrier to send downlink data to the terminal according to the service type information of the terminal and the information affecting the data transmission quality; the service type information comprises the service of the terminal and the service quality grade of the service; the information affecting the data transmission quality comprises the signal quality of each carrier monitored by the terminal and the load condition of each carrier monitored by the network side equipment.
For example, the service of the terminal is a voice service, and if the signal quality of each carrier monitored by the terminal is better, the network side device selects a small bandwidth carrier and a conventional bandwidth carrier to send data; for another example, if the service of the terminal is a voice service, and the signal quality of the terminal monitoring small-bandwidth carrier is poor, the network side device selects a conventional carrier to send data; for another example, when the network side device monitors that the load condition of each conventional carrier is medium or heavy, a small bandwidth carrier is also used for transmitting data during data transmission so as to share the load of the conventional carrier; for another example, when the terminal monitors that the signal quality of a small bandwidth carrier is poor, the small bandwidth carrier is not used and other small bandwidth carriers with better signal quality are selected when transmitting data. It can be seen that, in the embodiments of the present invention, by integrating various information related to the service type information and the information affecting the data transmission quality, on one hand, the load between each carrier can be balanced, and on the other hand, the combination of the small bandwidth carrier and the conventional bandwidth carrier can be effectively utilized, thereby achieving higher spectrum utilization efficiency.
In the embodiment of the invention, each small bandwidth carrier can be used by a plurality of terminals, so that the resources are used by the best user as soon as possible, and the resources are utilized to the maximum extent from the aspect of time.
The determining unit 11 is further configured to determine the regular bandwidth carrier and the small bandwidth carrier as the serving carrier if the determining unit 13 determines that downlink data is transmitted to the terminal using the small bandwidth carrier.
Further, as shown in fig. 4, the network-side device 10 further includes an allocating unit 14;
the allocating unit 14 is configured to, in a first scheduling period, perform, by the network device, downlink data allocation on the regular bandwidth carrier and the small bandwidth carrier according to information that affects data transmission quality in a current scheduling period;
the sending unit 12 is specifically configured to bear, on the normal bandwidth carrier, the downlink data allocated to the normal bandwidth carrier, and send the downlink data to the terminal; the downlink data allocated to the small bandwidth carrier is loaded on the small bandwidth carrier and sent to the terminal;
the allocating unit 14 is further configured to, in a non-first scheduling period, perform, by the network device, allocation of downlink data to the conventional bandwidth carrier and the small bandwidth carrier according to information that affects data transmission quality in a current scheduling period and data reception condition information in a last scheduling period that is fed back by the terminal;
the sending unit 12 is specifically configured to bear, on the normal bandwidth carrier, the downlink data allocated to the normal bandwidth carrier, and send the downlink data to the terminal; and the downlink data allocated to the small bandwidth carrier is carried on the small bandwidth carrier and sent to the terminal.
Preferably, the network side device 10 further includes a mobility management unit 15;
the mobility management unit is configured to acquire the normal bandwidth carrier and the small bandwidth carrier from the network side device and/or from frequency resources of other network side devices. In the embodiment of the present invention, information that affects data transmission quality in a data sending process is fully considered, for example, when a terminal is located at an edge of a cell, if signal quality of a small bandwidth carrier monitored by the terminal is poor, a network side device may obtain the use of the small bandwidth carrier from network frequency resources of other network side devices, if signal quality of a conventional carrier monitored by the terminal is poor, the use of the conventional carrier may also be obtained from network frequency resources of other network side devices, and even a service carrier provided by the network side device for the terminal may be obtained from other network side devices.
The embodiment of the invention provides network side equipment, which determines service carriers through a determining unit, wherein the service carriers comprise small-bandwidth carriers and conventional-bandwidth carriers, and transmits downlink data to a terminal through a transmitting unit by utilizing the small-bandwidth carriers and the conventional-bandwidth carriers.
Example four
As shown in fig. 5, an embodiment of the present invention provides a terminal 20, where the terminal 20 includes: a first transmitting unit 21 and a receiving unit 22;
the first sending unit is configured to send service type information to a network side device and the terminal monitors the signal quality of each carrier, so that the network side device determines a service carrier, where the service carrier includes a normal bandwidth carrier and a small bandwidth carrier; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz; the service type information comprises the service of the terminal and the service quality grade of the service; in this embodiment of the present invention, the behavior of the first sending unit occurs before the network side device determines the serving carrier.
The receiving unit 22 is configured to receive downlink data sent by the network side device through the normal bandwidth carrier and the small bandwidth carrier.
Further, as shown in fig. 6, the terminal 20 further includes: a second transmitting unit 23;
the second sending unit 23 is configured to send capability information to the network side device, so that the network side device determines whether the terminal supports a small bandwidth carrier of the network side device; the capability information reflects information of a small bandwidth carrier supported by the terminal.
It should be noted that the second sending unit 23 does not need to be executed each time the terminal initiates a service, and when the terminal initiates a concurrent service, a new RRC connection is established, so that the second sending unit may be omitted, for example, when the terminal makes a call, the terminal surfs the internet again, and after initiating the second service to surf the internet, the network side device further retains information whether the terminal supports the small bandwidth carrier.
In the embodiment of the present invention, the capability information includes an indication of whether the small bandwidth carrier is supported, a bandwidth size of the small bandwidth carrier supported by the terminal, a frequency band in which the small bandwidth carrier supported by the terminal is located, and a number of the small bandwidth carriers supported by the terminal; the capability information reflects the situation of the small carriers supported by the terminal, for example, the network side device generates a small bandwidth carrier of 2.5Mhz, but the bandwidth size of the small bandwidth carrier supported by the terminal is 1.25Mhz, so that the network side device determines that the terminal does not support the small bandwidth carrier provided by the network device.
Further, as shown in fig. 6, the terminal 20 further includes: a third transmitting unit 24;
the third sending unit 24 is configured to, in a first scheduling period, feed back, to the network device, the signal quality of each carrier monitored by the terminal in a current scheduling period, so that the network device performs downlink data allocation on the normal bandwidth carrier and the small bandwidth carrier; and in a non-first scheduling period, feeding back the signal quality of each carrier monitored by the terminal in the current scheduling period and the data receiving condition information in the previous scheduling period to the network equipment, so that the network side equipment can distribute downlink data to the conventional bandwidth carrier and the small bandwidth carrier. In this embodiment of the present invention, the behavior of the third sending unit occurs after the network side device determines the serving carrier.
The embodiment of the invention provides a terminal, which sends service type information to network side equipment through a first sending unit and monitors the signal quality of each carrier wave by the terminal so that the network side equipment can determine a service carrier wave, and receives downlink data sent by the network side equipment through a receiving unit by utilizing a conventional bandwidth carrier wave and a small bandwidth carrier wave.
EXAMPLE five
As shown in fig. 7, an embodiment of the present invention further provides a system 30 for data transmission, including a network-side device 10 and a terminal 20, where the network-side device is any network-side device described in the third embodiment, and any terminal described in the fourth embodiment.
The network side device 10 determines a service carrier for sending downlink data to the terminal, where the service carrier includes a normal bandwidth carrier and a small bandwidth carrier; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz; and sending downlink data to the terminal through the conventional bandwidth carrier and the small bandwidth carrier.
The terminal 20 sends service type information to a network side device and the terminal monitors the signal quality of each carrier, so that the network side device determines service carriers, wherein the service carriers comprise conventional bandwidth carriers and small bandwidth carriers; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz; the service type information comprises the service of the terminal and the service quality grade of the service; and receiving downlink data sent by the network side equipment through the conventional bandwidth carrier and the small bandwidth carrier.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (17)
1. A method of data transmission, the method comprising:
the method comprises the steps that network side equipment determines service carriers for sending downlink data to a terminal, wherein the service carriers comprise conventional bandwidth carriers and small bandwidth carriers; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz;
and sending downlink data to the terminal through the conventional bandwidth carrier and the small bandwidth carrier.
2. The method of claim 1,
before the network side device determines a service carrier for sending downlink data to the terminal, the method further includes:
judging whether the terminal supports the small bandwidth carrier or not according to the capability information of the terminal; the capability information reflects information of a small bandwidth carrier supported by the terminal;
the determining, by the network side device, a service carrier for sending downlink data to the terminal includes: and the network side equipment determines a service carrier for sending downlink data to the terminal under the condition that the terminal is determined to support the small bandwidth carrier according to the capability information.
3. The method according to claim 1 or 2,
the determining, by the network side device, a service carrier for sending downlink data to the terminal includes:
judging whether to use the small bandwidth carrier to send downlink data to the terminal according to the service type information of the terminal and the information influencing the data transmission quality; the service type information comprises the service of the terminal and the service quality grade of the service; the information affecting the data transmission quality comprises the signal quality of each carrier monitored by the terminal and the load condition of each carrier monitored by the network side equipment;
and under the condition that the network side equipment determines to use the small bandwidth carrier to send downlink data to the terminal, determining the conventional bandwidth carrier and the small bandwidth carrier as the service carrier.
4. The method of claim 3,
sending downlink data to the terminal through the normal bandwidth carrier and the small bandwidth carrier includes:
in a first scheduling period, according to information influencing data transmission quality in the current scheduling period, downlink data distribution is carried out on the conventional bandwidth carrier and the small bandwidth carrier;
loading the downlink data allocated to the conventional bandwidth carrier on the conventional bandwidth carrier, and sending the downlink data to the terminal; the downlink data allocated to the small bandwidth carrier is loaded on the small bandwidth carrier and sent to the terminal;
or,
in a non-first scheduling period, according to information affecting data transmission quality in a current scheduling period and data receiving condition information in a last scheduling period fed back by the terminal, performing downlink data allocation on the conventional bandwidth carrier and the small bandwidth carrier;
loading the downlink data allocated to the conventional bandwidth carrier on the conventional bandwidth carrier, and sending the downlink data to the terminal; and the downlink data allocated to the small bandwidth carrier is carried on the small bandwidth carrier and sent to the terminal.
5. The method according to claim 1, wherein before the network-side device determines the serving carrier for transmitting downlink data to the terminal, the method further comprises:
and acquiring the conventional bandwidth carrier and the small bandwidth carrier from the frequency resources of the network side equipment and/or other network side equipment.
6. A method of data transmission, the method comprising:
a terminal sends service type information to network side equipment and the terminal monitors the signal quality of each carrier, so that the network side equipment determines service carriers, wherein the service carriers comprise conventional bandwidth carriers and small bandwidth carriers; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz; the service type information comprises the service of the terminal and the service quality grade of the service;
and receiving downlink data sent by the network side equipment through the conventional bandwidth carrier and the small bandwidth carrier.
7. The method according to claim 6, wherein before the terminal sends the traffic type information to the network side device and the terminal monitors the signal information of each carrier, the method further comprises:
sending capability information to the network side equipment so that the network side equipment can judge whether the terminal supports the small bandwidth carrier of the network side equipment; the capability information reflects information of a small bandwidth carrier supported by the terminal.
8. The method according to claim 6 or 7, characterized in that the method further comprises:
receiving downlink data sent by the network side device through the normal bandwidth carrier and the small bandwidth carrier, including:
in a first scheduling period, feeding back the signal quality of each carrier monitored by the terminal in the current scheduling period to the network equipment, so that the network side equipment can distribute downlink data to the conventional bandwidth carrier and the small bandwidth carrier;
and in a non-first scheduling period, feeding back the signal quality of each carrier monitored by the terminal in the current scheduling period and the data receiving condition information in the previous scheduling period to the network equipment, so that the network side equipment can distribute downlink data to the conventional bandwidth carrier and the small bandwidth carrier.
9. A network side device, wherein the network side device comprises: a determining unit and a transmitting unit;
the determining unit is configured to determine a service carrier for sending downlink data to the terminal, where the service carrier includes a normal bandwidth carrier and a small bandwidth carrier; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz;
the sending unit is configured to send downlink data to the terminal through the normal bandwidth carrier and the small bandwidth carrier.
10. The network-side device according to claim 9, wherein the network-side device further comprises a determining unit;
the judging unit is used for judging whether the terminal supports the small bandwidth carrier according to the capability information of the terminal; the capability information reflects information of a small bandwidth carrier supported by the terminal;
the determining unit is further configured to determine a serving carrier for sending downlink data to the terminal when the determining unit determines that the terminal supports the small bandwidth carrier.
11. The network-side device of claim 9 or 10,
the judging unit is further configured to judge whether to send downlink data to the terminal using the small bandwidth carrier according to the service type information of the terminal and the information affecting the data transmission quality; the service type information comprises the service of the terminal and the service quality grade of the service; the information affecting the data transmission quality comprises the signal quality of each carrier monitored by the terminal and the load condition of each carrier monitored by the network side equipment;
the determining unit is further configured to determine the normal bandwidth carrier and the small bandwidth carrier as the serving carrier when the determining unit determines that the small bandwidth carrier is used to send downlink data to the terminal.
12. The network-side device of claim 11, wherein the network-side device further comprises an allocation unit;
the allocation unit is configured to, in a first scheduling period, perform, by the network device, allocation of downlink data to the conventional bandwidth carrier and the small bandwidth carrier according to information that affects data transmission quality in a current scheduling period;
the sending unit is specifically configured to load the downlink data allocated to the normal bandwidth carrier on the normal bandwidth carrier and send the downlink data to the terminal; the downlink data allocated to the small bandwidth carrier is loaded on the small bandwidth carrier and sent to the terminal;
the allocation unit is further configured to, in a non-first scheduling period, perform, by the network device, allocation of downlink data to the conventional bandwidth carrier and the small bandwidth carrier according to information that affects data transmission quality in a current scheduling period and data reception condition information in a last scheduling period that is fed back by the terminal;
the sending unit is specifically configured to load the downlink data allocated to the normal bandwidth carrier on the normal bandwidth carrier and send the downlink data to the terminal; and the downlink data allocated to the small bandwidth carrier is carried on the small bandwidth carrier and sent to the terminal.
13. The network-side device according to claim 9, wherein the network-side device further includes a mobility management unit;
the mobility management unit is configured to acquire the normal bandwidth carrier and the small bandwidth carrier from the network side device and/or from frequency resources of other network side devices.
14. A terminal, characterized in that the terminal comprises: a first transmitting unit and a receiving unit;
the first sending unit is configured to send service type information to a network side device and the terminal monitors the signal quality of each carrier, so that the network side device determines a service carrier, where the service carrier includes a normal bandwidth carrier and a small bandwidth carrier; the bandwidth of the small-bandwidth carrier is less than 5 MHz; the bandwidth of the conventional bandwidth carrier is an integral multiple of 5 MHz; the service type information comprises the service of the terminal and the service quality grade of the service;
the receiving unit is configured to receive downlink data sent by the network side device through the normal bandwidth carrier and the small bandwidth carrier.
15. The terminal of claim 14, wherein the terminal further comprises: a second transmitting unit;
the second sending unit is configured to send capability information to the network side device, so that the network side device determines whether the terminal supports a small bandwidth carrier of the network side device; the capability information reflects information of a small bandwidth carrier supported by the terminal.
16. The terminal according to claim 14 or 15, characterized in that the terminal further comprises: a third transmitting unit;
the third sending unit is configured to feed back, in a first scheduling period, the signal quality of each carrier monitored by the terminal in a current scheduling period to the network device, so that the network device allocates downlink data to the normal bandwidth carrier and the small bandwidth carrier; and in a non-first scheduling period, feeding back the signal quality of each carrier monitored by the terminal in the current scheduling period and the data receiving condition information in the previous scheduling period to the network equipment, so that the network side equipment can distribute downlink data to the conventional bandwidth carrier and the small bandwidth carrier.
17. A data transmission system, comprising a network side device and a terminal, wherein the network side device is the network side device of any one of claims 9 to 13, and the terminal is the terminal of any one of claims 14 to 16.
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