CN105451237A - A method for allocating wireless resources - Google Patents

Abstract

A method of source distribution for user device in a first base station of a LTE communication system is provided by the invention. The source belongs to a non-licensed carrier wave. The radio resource distribution method comprises: the first base station is configured to distribute the first number of physical resource blocks to the user device, wherein the first number of physical resource blocks is the subset of the physical resource blocks of the non-licensed carrier wave; the first base station is configured to send a first information, wherein the first information includes information indicating the first number of physical resource blocks.

Description

A method for allocating wireless resources

technical field

The present invention relates to the technical field of communication, in particular to the technical field of wireless communication.

Background technique

In the field of wireless communication, generally speaking, the traditional deployment method is that the system works in a licensed frequency band (licensed band), that is, the entire spectrum resource is reserved for the system to use. Typically, the LTE communication system works using licensed frequency bands.

However, with the further growth of wireless services, the requirements for the capacity and frequency band of the wireless communication system are also increased. In this case, the licensed frequency band resources of the LTE system appear to be relatively insufficient. Therefore, one of the recent research hotspots in the LTE field is how to use unlicensed frequency band resources to offload high-incidence data services. This kind of scheme is called the LTE (LTE in Unlicensed spectrum referred to as LTE-U) system belonging to the unlicensed carrier.

For example, in a typical scenario, the LTE system uses the frequency band of the WiFi system. That is, a situation where a cell of the LTE system and a cell of the WiFi system coexist at least partially geographically. In this case, if the LTE system can use the WiFi frequency band for business offloading at certain high-load moments, it can obviously greatly improve the system performance, thus effectively coping with high-load application scenarios. Research on how the LTE system and the WiFi system coexist in this scenario has been widely discussed in the industry.

However, there is another typical LTE-U application scenario, that is, the situation where multiple different LTE systems coexist on an unlicensed carrier, typically, that is, the situation where multiple LTE operators share a certain unlicensed carrier band, There are still many unresolved issues about how to deal with the coexistence scenario of multiple different LTE systems.

Obviously, when multiple different LTE systems coexist, the most important problem that must be solved is how to allocate radio resources reasonably. Different from the aforementioned coexistence of LTE and WiFi, the coexistence of multiple LTE systems has some unique requirements. For example, there may be a large number of voice services under the coexistence of multiple LTE systems, so the requirements for resource continuity are high, but the bandwidth requirements are low; for another example, the LTE system uses centralized resource allocation and scheduling, so only the base station has resource allocation. function. These characteristics make it impossible to solve the problem of resource allocation under the coexistence of multiple LTE systems by the distributed resource allocation method based on channel awareness in the existing coexistence mode of LTE and WiFi, so some new approaches must be found.

Therefore, the object of the present invention is to find a new wireless resource allocation method; this method needs to be able to effectively allocate wireless resources to meet the needs of each operator under the LTE-U scenario where multiple LTE systems coexist; Each base station can independently perform centralized control of resource allocation; it must also be compatible with existing specifications as much as possible to avoid excessive changes to existing protocols.

Contents of the invention

In order to solve the above problems in the prior art, the present invention proposes a new radio resource allocation method. By dividing the resource blocks of the entire unlicensed carrier frequency band into different subsets and allocating them to different operators, it is ensured that each operator can obtain sufficient and non-conflicting wireless resources.

Specifically, according to the first aspect of the present invention, a method for allocating resources for user equipment in a first base station of an LTE communication system is proposed, wherein the resources belong to unlicensed carriers, and the method includes: the first A base station allocates a first number of physical resource blocks to the user equipment, where the first number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier; the first base station sends a first message , the first message includes information indicating the first number of physical resource blocks.

Preferably, it also includes dividing the physical resource blocks of the unlicensed carrier into multiple patterns, each of which represents a subset of the physical resource blocks of the unlicensed carrier; the first base station is the Allocating the first number of physical resource blocks to the user equipment includes allocating one of the multiple patterns to the user equipment; the information indicating the first number of physical resource blocks includes indicating the number of physical resource blocks allocated to the user equipment Information about the one pattern.

More preferably, the first message further includes information indicating the resource allocation duration. .

More preferably, the first message includes a first sequence, and the first sequence simultaneously indicates the information of the one pattern allocated to the user equipment and the information of the resource allocation duration.

More preferably, the sending the first message by the first base station includes broadcasting the first message by the first base station on a predetermined flag channel.

More preferably, the predetermined marker channel is composed of predetermined time and frequency domain resources on the unlicensed carrier.

More preferably, the first base station sending the first message includes the first base station sending the first message to at least one second base station, and the first base station and the second base station respectively belong to different operators .

According to a second aspect of the present invention, a method for allocating resources for user equipment in a second base station of an LTE communication system is proposed, wherein the resources belong to unlicensed carriers, and the method includes:

The second base station receives a first message sent from at least one first base station, the first message includes information indicating a first number of physical resource blocks, the first number of physical resource blocks being the unlicensed carrier A subset of physical resource blocks, wherein the first base station and the second base station belong to different operators; the second base station allocates a second number of physical resource blocks to the user equipment, wherein the The second number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier and is disjoint with the first number of physical resource blocks; the second base station sends a second message, and the second message Information indicating the second number of physical resource blocks is included.

Preferably, it also includes dividing the physical resource blocks of the unlicensed carrier into multiple patterns, each of which represents a subset of the physical resource blocks of the unlicensed carrier; the second base station is the Allocating the second number of physical resource blocks to the user equipment includes allocating one of the plurality of patterns to the user equipment that is disjoint with the pattern corresponding to the first number of physical resource blocks; the indicating the second The information of the two numbers of physical resource blocks includes information indicating the one disjoint pattern allocated to the user equipment.

More preferably, the second message further includes information indicating the resource allocation duration.

More preferably, the second message includes a second sequence, the second sequence simultaneously indicates the information of the one disjoint pattern allocated to the user equipment and the information of the resource allocation duration.

Preferably, the sending the second message by the second base station includes broadcasting the second message by the second base station on a predetermined flag channel.

More preferably, the predetermined marker channel is composed of predetermined time and frequency domain resources on the unlicensed carrier.

Preferably, the second base station sending the second message includes the second base station sending the second message to at least one of the first base stations.

Preferably, the second base station receiving the first message sent from at least one first base station comprises the second base station receiving the first message on a predetermined flag channel, and the predetermined flag channel is determined by a predetermined composed of time and frequency domain resources on the unlicensed carrier. .

According to a third aspect of the present invention, a method for allocating resources for user equipment in a second base station of an LTE communication system is proposed, wherein the resources belong to unlicensed carriers, and the method includes: the second base station receiving a third message sent from the user equipment, the third message including information indicating a first number of physical resource blocks, the first number of physical resource blocks being a subset of the physical resource blocks of the unlicensed carrier ; The second base station allocates a second number of physical resource blocks to the user equipment, wherein the second number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier and is the same as the first The number of physical resource blocks is disjoint; the second base station sends a second message, the second message includes information indicating the second number of physical resource blocks.

According to a fourth aspect of the present invention, a method for assisting resource allocation in a user equipment of a second base station in an LTE communication system is proposed, wherein the resource belongs to an unlicensed carrier, and the method includes: the user equipment receiving A first message sent from at least one first base station, the first message including information indicating a first number of physical resource blocks that are subsections of physical resource blocks of the unlicensed carrier set, wherein the first base station and the second base station respectively belong to different operators; the user equipment sends a third message to the second base station, and the third message includes the Information about physical resource blocks.

Preferably, the user equipment receiving the first message sent from at least one first base station includes the user equipment receiving the first message on a predetermined flag channel, and the predetermined flag channel is determined by the predetermined Composition of time and frequency domain resources on the unlicensed carrier.

According to a fifth aspect of the present invention, a device for allocating resources for user equipment in a base station of an LTE communication system is proposed, wherein the resource belongs to an unlicensed carrier, and the device includes: a receiving module for the base station Receive a message including information indicating a first number of physical resource blocks, the first number of physical resource blocks being a subset of the physical resource blocks of the unlicensed carrier; an allocation module, configured for the base station to provide the user The device allocates a second number of physical resource blocks, where the second number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier and is disjoint with the first number of physical resource blocks; the sending module is used for the base station to send a second message, where the second message includes information indicating the second number of physical resource blocks.

According to a sixth aspect of the present invention, a device for assisting resource allocation in a user equipment of a second base station of an LTE communication system is proposed, wherein the resource belongs to an unlicensed carrier, and the device includes: a receiving module, Used for the user equipment to receive a first message sent from at least one first base station, where the first message includes information indicating a first number of physical resource blocks, and the first number of physical resource blocks are the unlicensed A subset of physical resource blocks of a carrier, where the first base station and the second base station belong to different operators; a sending module, configured for the user equipment to send a third message to the second base station, the The third message includes information indicating the first number of physical resource blocks.

In the present invention, by dividing the resource blocks of the entire unlicensed carrier frequency band into different subsets for allocation, it is ensured that each operator can obtain suitable wireless resources; by sending resource allocation information by the base station, it is ensured that different operators The resource allocation of the LTE system will not conflict; by further resource allocation by the base station according to the existing resource allocation information, the centralized resource allocation mechanism of the LTE system is maintained; at the same time, only a small amount of signaling needs to be introduced, so as to maximize the compatibility with the existing specifications to maintain compatibility.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

FIG. 1 shows a schematic diagram of a PRB pattern division according to the present invention;

Fig. 2 shows a flow chart of a method for allocating radio resources in an LTE communication system according to the present invention;

FIG. 3 shows a flowchart of another method for allocating radio resources in an LTE communication system according to the present invention;

FIG. 4 shows a flow chart of another method for allocating radio resources in an LTE communication system according to the present invention;

FIG. 5 shows a flowchart of a method for assisting in allocating radio resources in an LTE communication system according to the present invention;

FIG. 6 shows a block diagram of a device for allocating radio resources in an LTE communication system according to the present invention;

Fig. 7 shows a block diagram of a device for assisting in allocating radio resources in an LTE communication system according to the present invention.

Wherein, the same or similar reference numerals represent the same or similar steps, features or devices/modules.

detailed description

In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. Accordingly, the following detailed description is not limiting, and the scope of the invention is defined by the appended claims.

First, according to the application scenario of the present invention, there is an area covered by an LTE communication system, and in this area, base stations and UEs of more than one operator may be included at the same time. In addition, there are other unlicensed carriers in this area. However, when base stations of multiple operators above all want to allocate radio resources on the unlicensed carrier, resource allocation conflicts may occur due to the lack of a coordination mechanism among base stations belonging to different operators. For this reason, the present invention proposes to divide this unlicensed physical resource block (Physicalresourceblock for short PRB) into different subsets, and each operator's base station selects the corresponding subsets to allocate to respective UEs according to service requirements, thereby Effectively avoid conflicts.

On this basis, according to an embodiment of the present invention, a method for allocating unlicensed carrier resources for a UE in a first base station of an LTE communication system is proposed. specific:

First, allocate the first number of PRBs to the UE, where the first number of PRBs is a subset of the PRBs of the unlicensed carrier; the purpose of this is to ensure that the UE is provided with continuous resources in the time domain to meet the needs of voice services requirements, while reserving some frequency domain resources for use by other operators.

In the second step, the first base station sends a first message to indicate the information of the first number of PRBs that have been allocated; the function of the first message is to ensure that base stations of other operators will not select this part when they allocate resources again PRB, thus avoiding conflicts.

The first message above may use various possible ways to indicate the first number of PRBs, for example, it may be indicated in a bitmap (bitmap) way. Preferably, in order to reduce signaling overhead, PRBs of the entire unlicensed carrier may be divided into multiple different patterns in advance, as shown in FIG. 1 . Each pattern represents a PRB subset, and the first base station selects one of the above patterns to allocate to the UE when performing resource allocation; correspondingly, in the above first message, it only needs to indicate which has been selected Only one pattern is enough, which reduces the information that needs to be sent.

Further, in the first message, information indicating the duration of the sub-resource allocation scheme may also be sent, and the information may be considered by other base stations when performing subsequent resource allocation.

As a preference, the present invention proposes that the above-mentioned first message may include a first sequence, and the function of the first sequence is to indicate the above-mentioned pattern allocation and duration information at the same time, so that only one sequence is required to transmit the information at the same time. Two messages. Specifically, the following formula can be used to obtain the information according to the value of the first sequence:

Among them, I _sequence indicates the value of the first sequence this time, I _pattern indicates the pattern allocated this time; T _pattern indicates the duration of this allocation; N _pattern indicates the total number of patterns, and N _root indicates the first sequence takes total number of values. Indicates the rounding down operation.

Further, the first base station may broadcast the first message on a predetermined flag channel; the advantage of broadcasting is that the first base station does not need to know whether there are base stations of other operators coexisting with it. Specifically, the flagchannel is composed of predetermined time and frequency domain resources on the unlicensed carrier, for example, it can be agreed to always use the PRB in the middle part of the unlicensed carrier frequency band as the flagchannel or always use the unlicensed carrier frequency band The PRB of the edge part is used as a flagchannel. The specific broadcasting method does not affect the effect of the present invention. For example, it can be periodic broadcasting or continuous broadcasting, and different flagchannels can be defined for different operators, etc., all of which belong to the protection scope of the present invention.

Alternatively, the first base station may also directly send the first message to at least one second base station belonging to a different operator through an air interface. This method requires the first base station to first obtain relevant information about the existence of the second base station, and the advantage is that the transmission is more targeted and accurate.

Accompanying drawing 2 shows the flowchart of resource allocation according to the above-mentioned embodiment, including:

S21. The first base station allocates a first number of physical resource blocks to the user equipment, where the first number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier;

S22. The first base station sends a first message, where the first message includes information indicating the first number of physical resource blocks.

According to another embodiment of the present invention, a method for allocating unlicensed carrier resources for a UE in a second base station of an LTE communication system is proposed. specific:

The second base station first receives a first message sent from at least one first base station, the first message includes information indicating a first number of PRBs, and the first number of PRBs is a subset of PRBs of the unlicensed carrier , wherein, the first base station and the second base station respectively belong to different operators; that is, the second base station first receives the information of the PRB allocated by the first base station;

In the second step, the second base station allocates a second number of PRBs to the UE, and the second number of PRBs is also a subset of the PRBs of the above-mentioned unlicensed carrier and is disjoint with the first number of PRBs; Select a subset of the remaining PRBs to allocate to the UE

In the third step, the second base station sends a second message, where the second message is used to indicate the information of the second number of PRBs; similarly, the second message is used for subsequent resource allocation.

Similar to the previous embodiment, further, the division of PRBs may be performed in the form of a pattern. At this time, the first message received by the second base station includes the information of the selected pattern, and when the second base station allocates resources, it needs to select a disjoint pattern from the remaining patterns. pattern. Likewise, the information indicating this disjoint pattern is also included in the sent second message.

Similarly, the second message may include duration information; a second sequence may be used to represent both the pattern and the duration; the second message may be broadcast through a flagchannel; or the second message may be directly sent to the first base station. All of the above are similar to the previous embodiment and will not be repeated here.

When the second base station receives the first message, it may also receive it from the flagchannel.

Accompanying drawing 3 shows the flowchart of resource allocation according to the above-mentioned embodiment, including:

S31. The second base station receives a first message sent from at least one first base station;

S32. The second base station allocates a second number of physical resource blocks to the user equipment;

S33. The second base station sends a second message.

According to another embodiment of the present invention, a method for allocating unlicensed carrier resources for a UE in a second base station of an LTE communication system is proposed. The difference between this embodiment and the second embodiment is that the second base station does not learn the information of the allocated resources by receiving the first message sent from the first base station, but receives the third message sent from the UE informed. That is, the reception of the flagchannel is not completed by the second base station. specific:

The second base station receives a third message sent from the UE, where the third message includes information indicating a first number of PRBs, where the first number of PRBs is a subset of PRBs of the unlicensed carrier;

In the second step, the second base station allocates a second number of PRBs to the UE, and the second number of PRBs is also a subset of the PRBs of the above-mentioned unlicensed carrier and is disjoint with the first number of PRBs; Select a subset of the remaining PRBs to allocate to the UE

In the third step, the second base station sends a second message, where the second message is used to indicate the information of the second number of PRBs; similarly, the second message is used for subsequent resource allocation.

Accompanying drawing 4 shows the flowchart of resource allocation according to the above-mentioned embodiment, including:

S41. The second base station receives a third message sent from the UE;

S42. The second base station allocates a second number of physical resource blocks to the user equipment;

S43. The second base station sends a second message.

According to another embodiment of the present invention, a method for assisting resource allocation in a UE of a second base station in an LTE communication system is proposed. That is, the UE of the second base station receives the flagchannel, and then notifies the second base station of the allocated resource information. specific:

The UE first receives a first message sent from at least one first base station, where the first message includes information indicating a first number of PRBs, and the first number of PRBs is a subset of PRBs of the unlicensed carrier, where, The first base station and the second base station respectively belong to different operators;

Then, the UE sends a third message to the second base station, where the third message includes information indicating the first number of PRBs.

Further, the UE receives the first message on a flagchannel composed of predetermined time and frequency domain resources on the unlicensed carrier.

Accompanying drawing 5 shows the flowchart of assisting resource allocation according to the above-mentioned embodiment, including:

S51. The UE receives the first message sent from the first base station;

S52. The UE sends a third message to the second base station.

The equipment corresponding to the above-mentioned method provided by the present invention will be described below in conjunction with the accompanying drawings. In view of the corresponding relationship between the unit/device features and the step features in the above-mentioned method, it will be simplified.

Figure 6 shows a device 60 for allocating resources for user equipment in a base station of an LTE communication system according to the present invention, wherein the resource belongs to an unlicensed carrier, and the device includes:

A receiving module 6001, configured for the base station to receive a message including information indicating a first number of physical resource blocks, where the first number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier;

An allocation module 6002, configured for the base station to allocate a second number of physical resource blocks to the user equipment, where the second number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier and is identical to the The first number of physical resource blocks are disjoint;

The sending module 6003 is configured for the base station to send a second message, where the second message includes information indicating the second number of physical resource blocks.

Figure 7 shows a device 70 for assisting resource allocation in a user equipment of a second base station of an LTE communication system according to the present invention, wherein the resource belongs to an unlicensed carrier, and the device includes:

A receiving module 7001, configured for the user equipment to receive a first message sent from at least one first base station, where the first message includes information indicating a first number of physical resource blocks, and the first number of physical resource blocks is a subset of physical resource blocks of the unlicensed carrier, wherein the first base station and the second base station belong to different operators;

A sending module 7002, configured for the user equipment to send a third message to the second base station, where the third message includes information indicating the first number of physical resource blocks.

The embodiments of the present invention have been described above, but the present invention is not limited to specific systems, devices and specific protocols, and those skilled in the art can make various changes or modifications within the scope of the appended claims.

Other changes to the disclosed embodiments can be understood and effected by those of ordinary skill in the art by studying the specification, disclosure, drawings and appended claims. In the claims, the word "comprising" does not exclude other elements and steps, and the word "a" does not exclude a plurality. In the present invention, "first" and "second" only represent names, and do not represent a sequence relationship. In the actual application of the invention, one component may perform the functions of multiple technical features cited in the claims. Any reference signs in the claims should not be construed as limiting the scope.

Claims (20)

1. A method for allocating resources for user equipment in a first base station of an LTE communication system, wherein the resources belong to unlicensed carriers, the method comprising: The first base station allocates a first number of physical resource blocks to the user equipment, where the first number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier; The first base station sends a first message, where the first message includes information indicating the first number of physical resource blocks. 2. The method of claim 1, further comprising, dividing the physical resource blocks of the unlicensed carrier into a plurality of patterns, each of the patterns representing a subset of the physical resource blocks of the unlicensed carrier; Allocating, by the first base station, a first number of physical resource blocks to the user equipment includes allocating one of the plurality of patterns to the user equipment; The information indicating the first number of physical resource blocks includes information indicating the one pattern allocated to the user equipment. 3. The method of claim 2, wherein the first message further comprises information indicating a duration of the resource allocation. 4. The method according to claim 3, wherein the first message comprises a first sequence indicating both the information of the one pattern allocated to the user equipment and the resource allocation Duration information. 5. The method according to claim 1, wherein the sending the first message by the first base station comprises broadcasting the first message by the first base station on a predetermined marker channel. 6. The method according to claim 6, wherein the predetermined marker channel is composed of predetermined time and frequency domain resources on the unlicensed carrier. 7. The method according to claim 1, wherein the first base station sending the first message comprises the first base station sending the first message to at least one second base station, the first base station and the The second base stations belong to different operators respectively. 8. A method for allocating resources for user equipment in a second base station of an LTE communication system, wherein the resources belong to unlicensed carriers, the method comprising: The second base station receives a first message sent from at least one first base station, the first message includes information indicating a first number of physical resource blocks, the first number of physical resource blocks being the unlicensed carrier A subset of physical resource blocks, wherein the first base station and the second base station respectively belong to different operators; The second base station allocates a second number of physical resource blocks to the user equipment, wherein the second number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier and is different from the first number of Physical resource blocks are disjoint; The second base station sends a second message, the second message including information indicating the second number of physical resource blocks. 9. The method of claim 8, further comprising partitioning the physical resource blocks of the unlicensed carrier into a plurality of patterns, each of the patterns representing a subset of the physical resource blocks of the unlicensed carrier; Allocating, by the second base station, a second number of physical resource blocks to the user equipment includes allocating to the user equipment one of the multiple patterns that is disjoint to a pattern corresponding to the first number of physical resource blocks pattern; The information indicating the second number of physical resource blocks includes information indicating the one disjoint pattern allocated to the user equipment. 10. The method of claim 9, wherein the second message further includes information indicating a duration of the resource allocation. 11. The method according to claim 10, wherein the second message comprises a second sequence indicating both the information of the one disjoint pattern assigned to the user equipment and the Information about the resource allocation duration. 12. The method of claim 8, wherein the second base station sending the second message comprises the second base station broadcasting the second message on a predetermined marker channel. 13. The method according to claim 12, wherein the predetermined marker channel is composed of predetermined time and frequency domain resources on the unlicensed carrier. 14. The method of claim 8, wherein the second base station sending the second message comprises the second base station sending the second message to at least one of the first base stations. 15. The method of claim 8, wherein the second base station receiving a first message sent from at least one first base station comprises the second base station receiving the first message on a predetermined marker channel, The predetermined marker channel is composed of predetermined time and frequency domain resources on the unlicensed carrier. 16. A method for allocating resources for user equipment in a second base station of an LTE communication system, wherein the resources belong to unlicensed carriers, the method comprising: The second base station receives a third message sent from the user equipment, where the third message includes information indicating a first number of physical resource blocks, the first number of physical resource blocks being the unlicensed carrier a subset of physical resource blocks; The second base station allocates a second number of physical resource blocks to the user equipment, wherein the second number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier and is different from the first number of Physical resource blocks are disjoint; The second base station sends a second message, the second message including information indicating the second number of physical resource blocks. 17. A method for assisting resource allocation in a user equipment of a second base station of an LTE communication system, wherein the resource belongs to an unlicensed carrier, the method comprising: The user equipment receives a first message sent from at least one first base station, the first message includes information indicating a first number of physical resource blocks, and the first number of physical resource blocks is the unlicensed carrier a subset of physical resource blocks, wherein the first base station and the second base station respectively belong to different operators; The user equipment sends a third message to the second base station, where the third message includes information indicating the first number of physical resource blocks. 18. The method according to claim 17, wherein said user equipment receiving a first message sent from at least one first base station comprises said user equipment receiving said first message on a predetermined flag channel, said The predetermined marker channel is composed of predetermined time and frequency domain resources on the unlicensed carrier. 19. A device for allocating resources for user equipment in a base station of an LTE communication system, wherein the resources belong to an unlicensed carrier, the device comprising: A receiving module, configured for the base station to receive a message including information indicating a first number of physical resource blocks, the first number of physical resource blocks being a subset of the physical resource blocks of the unlicensed carrier; An allocation module, configured for the base station to allocate a second number of physical resource blocks to the user equipment, wherein the second number of physical resource blocks is a subset of the physical resource blocks of the unlicensed carrier and is the same as the the first number of physical resource blocks are disjoint; A sending module, configured for the base station to send a second message, where the second message includes information indicating the second number of physical resource blocks. 20. A device for assisting resource allocation in a user equipment of a second base station of an LTE communication system, wherein the resource belongs to an unlicensed carrier, the device comprising: A receiving module, configured for the user equipment to receive a first message sent from at least one first base station, where the first message includes information indicating a first number of physical resource blocks, and the first number of physical resource blocks is the A subset of physical resource blocks of the unlicensed carrier, wherein the first base station and the second base station respectively belong to different operators; A sending module, configured for the user equipment to send a third message to the second base station, where the third message includes information indicating the first number of physical resource blocks.