WO2011082525A1 - 用于为用户终端确定时间提前量的方法及装置 - Google Patents
用于为用户终端确定时间提前量的方法及装置 Download PDFInfo
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- WO2011082525A1 WO2011082525A1 PCT/CN2010/070051 CN2010070051W WO2011082525A1 WO 2011082525 A1 WO2011082525 A1 WO 2011082525A1 CN 2010070051 W CN2010070051 W CN 2010070051W WO 2011082525 A1 WO2011082525 A1 WO 2011082525A1
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- WIPO (PCT)
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- timing advance
- user terminal
- uplink transmission
- component carrier
- destination device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
Definitions
- the present invention relates to a method and apparatus for determining a timing advance for a user terminal. Background technique
- the user terminal In wireless communication, the user terminal must adjust the uplink transmission time to compensate for the uplink transmission delay to ensure that the base station can correctly receive the uplink transmission.
- the uplink transmission time adjustment amount is usually determined by the base station and notified by the base station to the user terminal.
- LTE since all radio resources are concentrated in one frequency band, i.e., there is only one component carrier, only one time advance is required in the user terminal.
- LTE-Advanced carrier aggregation is used to increase system capacity.
- LTE-Advanced there may be multiple component carriers that are discontinuously distributed, and the total system bandwidth can reach 100M.
- a user terminal may be configured with multiple component carriers. For a user terminal, if it is configured with only one carrier component, the uplink transmission of the user terminal requires only one timing advance. However, in the case where the user terminal is configured with multiple component carriers, the uplink transmission of the user terminal requires a plurality of timing advances. However, there is currently no specific solution for how to maintain multiple timing advances in a user terminal. Summary of the invention
- the present invention proposes a technical solution for how to maintain a plurality of time advance amounts in a user terminal of a wireless communication system.
- a method for determining a timing advance for a user terminal in a base station of a wireless communication network comprising the steps of: determining uplink transmission of the user terminal on a component carrier Whether a new timing advance is required; if a new timing advance is required, the user terminal is notified to send a random access code on the component carrier to the destination device of the uplink transmission.
- a user in a wireless communication network includes the following steps: determining whether an uplink transmission on a component carrier needs to send a random access code to the destination device of the uplink transmission; if it is determined that the random access code needs to be sent to the uplink transmission The destination device sends a random access code on the component carrier to the destination device for uplink transmission.
- apparatus for determining a timing advance for a user terminal in a base station of a wireless communication network comprising: first determining means for determining that the user terminal is on a component carrier Whether the uplink transmission on the uplink requires a new timing advance; the notifying means, configured to notify the user terminal to send the random access code on the component carrier to the destination device of the uplink transmission if a new timing advance is required .
- apparatus for determining a timing advance thereof in a user terminal of a wireless communication network comprising: second determining means for determining whether an uplink transmission on a component carrier is required Sending a random access code to the destination device of the uplink transmission; the sending device, configured to: if it is determined that the random access code needs to be sent to the destination device of the uplink transmission, send the random access code to the uplink transmission on the component carrier device.
- a multi-component carrier wireless communication system is provided with a solution for effectively maintaining multiple timing advances in a user terminal, on the basis of which, for example, multi-point cooperation, frequency selectivity can be used.
- the technical solution of the present invention has little change to the user terminal and maintains good compatibility.
- FIG. 1 is a schematic diagram of an application scenario of a wireless communication network in accordance with an embodiment of the present invention
- FIG. 2 is a flow chart of a method for determining a timing advance for a user terminal in a base station of a wireless communication network, in accordance with an embodiment of the present invention
- 3 is a schematic diagram of an application scenario of coordinated multipoint transmission according to an embodiment of the present invention
- FIG. 4(a) is a schematic diagram of an application scenario of a wireless relay according to an embodiment of the present invention.
- 4(b) is a schematic diagram of an application scenario of multipoint transmission according to an embodiment of the present invention.
- FIG. 5 is a flow chart of a method for determining a timing advance in a user terminal of a wireless communication network, in accordance with an embodiment of the present invention
- FIG. 6 is a structural block diagram of an apparatus 600 for determining a timing advance for a user terminal in a base station of a wireless communication network, in accordance with an embodiment of the present invention
- FIG. 7 is a block diagram showing the structure of an apparatus 700 for determining a timing advance thereof in a user terminal of a wireless communication network according to an embodiment of the present invention
- FIG. 1 shows an application scenario diagram of a wireless communication network in accordance with an embodiment of the present invention.
- base station 11 configures one or more component carriers for user terminal 21 and determines different timing advances on different component carriers for the user terminal.
- FIG. 2 illustrates a flow chart of a method for determining a timing advance for a user terminal in a base station of a wireless communication network in accordance with an embodiment of the present invention.
- the base station 11 determines time advance for the user terminal 12 in conjunction with FIG.
- the method flow chart of the quantity is described in detail.
- step S201 the base station 11 determines whether the uplink transmission of the user terminal 21 on a component carrier requires a new timing advance.
- the meaning of the new timing advance is for the existing timing advance.
- For current wireless communication systems for example, for a single component carrier LTE wireless communication system, there is only one timing advance in the system (of course, this time is mentioned The value of the pre-volume may vary over time).
- a timing advance cannot satisfy the needs of the wireless communication system, and thus requires multiple timing advances.
- one or more new timing advances may be added depending on the application scenario on the basis of an existing timing advance. , which will be explained below.
- the timing advance since downlink synchronization has been implemented in a wireless communication system, the timing advance only refers to the uplink transmission delay of the user terminal to the base station.
- whether the uplink transmission of the user terminal 21 on one component carrier requires a new timing advance can be divided into various situations.
- the user terminal 21 is first configured with one component carrier CC1 for uplink transmission, and later, due to factors such as an increase in the amount of uplink data of the user terminal 21, the base station 11 is again The user terminal newly allocates a carrier component CC2 for uplink transmission, and the base station 11 determines that the uplink transmission of the user terminal 21 on the newly allocated component carrier CC2 requires a new timing advance.
- the base station 11 determines that the uplink transmission of the user terminal 21 on the newly allocated component carrier CC2 requires a new time.
- Advance quantity Since the frequency of the component carrier is usually a frequency range, such as 700 MHz to 720 MHz, the difference between the frequency of CC2 and the frequency of CC1 can be defined by the difference between their center frequencies.
- the value of the second predetermined threshold may be determined according to factors such as parameters of the wireless system and channel conditions at different frequencies.
- the frequency bandwidth is 100 MHz and the frequency bandwidth is discontinuously distributed, it can be divided into five component carriers, each component carrier having a bandwidth of 20 MHz, if two component carriers CC1 and CC2 The center frequency difference is greater than 80 MHz, and the base station 11 determines that the uplink transmission of the user terminal 21 on the newly allocated component carrier CC2 requires a new timing advance.
- FIG. 3 Another scenario is the application scenario of coordinated multi-point transmission shown in FIG. 3.
- the user terminal 21 simultaneously transmits the uplink number to the base station 11 and the base station 12 on the component carrier CC1.
- the base station 11 is responsible for controlling the transmission of the user terminal 21. If the difference between the distance between the user terminal 21 and the base station 11 and the distance between the user terminal 21 and the base station 12 exceeds a second predetermined threshold, the base station 11 determines that the uplink transmission of the user terminal 11 on the component carrier CC1 to the base station 12 requires a new time. Advance quantity.
- the value of the second predetermined threshold may be determined based on parameters of the wireless system. In one embodiment, the second predetermined value is taken as 17 kilometers.
- Fig. 4 (a) or Fig. 4 (b) There is also a situation as shown in Fig. 4 (a) or Fig. 4 (b), if the user terminal 21 first performs uplink transmission on the frequency fl, and then simultaneously performs uplink transmission on f2, if the frequency difference between f 1 and When the first predetermined threshold is exceeded, the base station 21 determines that the uplink transmission of the user terminal 11 on the frequency f2 requires a new timing advance.
- Fl and may be located in the same component carrier, or may be located in different component carriers.
- the user terminal 21 performs uplink transmission to the base station 11 on the frequency fl through a relay station or a repeater 31.
- the user terminal 21 performs uplink transmission to the base station 11 on the frequency ⁇ via a relay station or a repeater 32.
- Fl and 2 may be located in the same component carrier, or may be located in different component carriers.
- the user terminal 21 performs uplink transmission to the base station 11 on the frequency fl, and uplink transmission to the base station 12 on the frequency 2.
- Fl and 2 may be located in the same component carrier, or may be located in different component carriers.
- step S202 if the uplink transmission of the user terminal 21 on one component carrier requires a new timing advance, the base station 11 notifies the user terminal 21 to transmit the random access code to the uplink on the component carrier.
- the destination device for transmission if the uplink transmission of the user terminal 21 on one component carrier requires a new timing advance, the base station 11 notifies the user terminal 21 to transmit the random access code to the uplink on the component carrier. The destination device for transmission.
- the user terminal 21 transmits a random access code to the destination device of the uplink transmission on the component carrier in accordance with the notification from the base station 11.
- the base station 11 is the destination device for the uplink transmission corresponding to the new timing advance.
- the base station 12 is the destination device for the uplink transmission corresponding to the new timing advance.
- the user terminal 21 transmits a random access code to a destination device for uplink transmission on a random access channel (RACH).
- RACH random access channel
- step S203 the base station 11 acquires a new timing advance and notifies the user.
- the terminal 11 has this new timing advance.
- the manner in which the base station 11 acquires the new timing advance is also different depending on whether the base station 11 is different for the destination device of the uplink transmission corresponding to the new timing advance.
- the base station 11 determines a new time advance according to the time point at which the random access code is received and the time point at which the user terminal 21 transmits the random access code. And notify the user terminal 21 of the new timing advance, as shown in FIG. 1 or FIG. 4 ( & ).
- the time point at which the user terminal 21 transmits the random access code is specified by the base station 11, so that the base station 11 can determine the timing advance according to the time point at which the random access code is received.
- the base station 11 receives the new timing advance from the destination device, and transmits the new timing advance to the user terminal 21, as shown in FIG. 3 or 4 (b)
- the base station 21 determines a new timing advance according to the time point at which the random access code is received and the time point at which the user terminal 21 transmits the random access code, and the new timing advance It is transmitted to the base station 11, and then the base station 11 transmits the new timing advance to the user terminal 21.
- step S203 is not a necessary step of the present invention.
- the new timing advance can be directly sent by the destination device to the user terminal 21 without being forwarded via the base station 11.
- the base station 11 determines that the uplink transmission of the user terminal 21 on one component carrier does not require a new timing advance, the user terminal 21 is notified to perform uplink transmission on the component carrier using the existing timing advance.
- Figure 5 illustrates a flow chart of a method for determining its timing advance in a user terminal of a wireless communication network in accordance with an embodiment of the present invention.
- the process of executing the flow shown in FIG. 5 by the user terminal 21 will be described in detail below with reference to the application scenario shown in FIG. 1 or FIG. 3, FIG. 4(a) or FIG. 4(b).
- step S501 the user terminal 21 determines whether the uplink transmission on one component carrier needs to transmit a random access code to the destination device of the uplink transmission.
- the user terminal 21 can determine, according to the notification from the base station 11, that the need is in the The random access code is sent to the destination device of the uplink transmission on the component carrier.
- the user terminal 21 can also determine whether the uplink transmission on one component carrier needs to transmit a random access code to the destination device of the uplink transmission without the notification of the base station 11.
- the user terminal 21 determines to send the random access code to the component carrier.
- the destination device for the transmission For example, if the difference between the frequency of one component carrier that needs to perform the uplink transmission and the frequency of the other component carrier of the existing timing advance is greater than the first predetermined threshold, the user terminal 21 determines to send the random access code to the component carrier.
- the destination device for the transmission For example, if the difference between the frequency of one component carrier that needs to perform the uplink transmission and the frequency of the other component carrier of the existing timing advance is greater than the first predetermined threshold, the user terminal 21 determines to send the random access code to the component carrier.
- the destination device for the transmission For example, if the difference between the frequency of one component carrier that needs to perform the uplink transmission and the frequency of the other component carrier of the existing timing advance is greater than the first predetermined threshold, the user terminal 21 determines to send the random access code to the component carrier.
- the destination device for the transmission For example, if the difference between the frequency of one component carrier that needs to perform the uplink transmission
- step S502 if the user terminal 21 determines that the random access code needs to be transmitted to the destination device of the uplink transmission, the random access code is transmitted on the component carrier to the destination device for uplink transmission.
- the user terminal 21 performs uplink transmission on the component carrier according to a new timing advance from the destination device.
- the new timing advance is determined by the destination device, and may be directly sent to the user terminal 21 by the destination device or sent to the user terminal 21 via the base station 11 (in this case, the base station 11 is not the destination device for uplink transmission).
- Figure 6 is a block diagram showing the structure of an apparatus 600 for determining a timing advance for a user terminal in a base station of a wireless communication network in accordance with an embodiment of the present invention.
- the apparatus 600 includes a first determining means 601, a notifying means 602, and an acquisition notifying means 603. '
- the first determining means 601 determines whether a new timing advance is required for the uplink transmission of the user terminal 21 on one component carrier.
- the meaning of the new timing advance here is as described above.
- the notifying means 602 notifies the user terminal 21 to transmit the random access code to the uplink transmission on the component carrier.
- the purpose of the device For the application scenario shown in FIG. 1 or FIG. 4( a ), the base station 11 is a destination device for uplink transmission corresponding to a new timing advance.
- the base station 12 is the destination device of the uplink transmission corresponding to the new timing advance.
- the acquisition notification means 603 acquires the above new timing advance and notifies the user terminal 21 of the new timing advance.
- the manner in which the acquisition notification means 603 acquires the new timing advance is also different depending on whether the base station 11 is different for the destination device of the uplink transmission corresponding to the new timing advance.
- the acquisition notification means 603 determines a new time advance according to the time point at which the random access code is received and the time point at which the user terminal 21 transmits the random access code. And notify the user terminal 21 of the new timing advance, as shown in FIG. 1 or FIG. 4 ( & ).
- the time point at which the user terminal 21 transmits the random access code is specified by the base station 11, and therefore the acquisition notifying means 603 can determine the timing advance amount based on the time point at which the random access code is received.
- the acquisition notification device 603 receives the new timing advance from the destination device, and transmits the new timing advance to the user terminal 21, as shown in FIG. Or the application scenario shown in FIG. 4(b), the base station 21 determines a new timing advance according to the time point when the random access code is received and the time point at which the user terminal 21 sends the random access code, and the new time is obtained. The advance amount is sent to the acquisition notification means 603, and then the acquisition notification means 603 transmits the new timing advance to the user terminal 21.
- the acquisition notification means 603 is not a necessary means of the apparatus 600 of the present invention.
- the new timing advance can be sent directly to the user terminal 21 by the destination device.
- Figure 7 is a block diagram showing the structure of an apparatus 700 for determining the amount of time advancement in a user terminal of a wireless communication network.
- the apparatus 700 includes a second determining means 701 and a transmitting means 702.
- the second determining means 701 determines whether the uplink transmission on one component carrier needs to transmit a random access code to the destination device of the uplink transmission.
- the second determining means 701 can determine, based on the notification from the base station 11, that the random access code needs to be transmitted on the component carrier to the destination device of the uplink transmission.
- the second determining means 701 can also determine whether the uplink transmission on one component carrier needs to transmit a random access code to the destination device of the uplink transmission without the notification of the base station 11.
- the second determining means 701 determines to send the random access on the component carrier. Code to the destination device for uplink transmission.
- the transmitting device 702 transmits the random access code to the destination device for uplink transmission on the component carrier.
- the user terminal 21 performs uplink transmission on the component carrier according to a new timing advance from the destination device.
- the new timing advance is determined by the destination device, and may be directly sent by the destination device to the user terminal 21 or sent to the user terminal 21 via the base station 11 (in this case, the base station 11 is not the destination device for uplink transmission).
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Description
用于为用户终端确定时间提前量
的方法及装置 技术领域
本发明涉及用于为用户终端确定时间提前量的方法和装置。 背景技术
在无线通信中, 用户终端必须调整上行传输时间以补偿上行传输延 时以保证基站能够正确地收到该上行传输。 上行传输时间调整量通常由 基站确定并由基站通知用户终端。 在 LTE中, 由于所有的无线资源都集 中在一个频带里, 也即仅有一个分量载波, 用户终端中仅需维持一个时 间提前量。
在 LTE-Advanced 中, 采用了载波聚合来增加系统容量, 也即在 LTE-Advanced中, 可存在不连续分布的多个分量载波, 系统总带宽可达 到 100M。 一个用户终端可能被配置了多个分量载波。 对于用户终端, 如果其仅被配置了一个载波分量, 则该用户终端的上行传输只需要一个 时间提前量。 但在用户终端配置了多个分量载波的情形下, 用户终端的 上行传输需要多个时间提前量。 但目前对于用户终端中如何维持多个时 间提前量没有具体的解决方案。 发明内容
本发明提出了一种无线通信系统用户终端中如何维持多个时间提 前量的技术方案。
根据本发明的一个实施例, 提供了一种在无线通信网络的基站中 用于为用户终端确定时间提前量的方法, 该方法包括以下步骤: 确定 所述用户终端在一个分量载波上的上行传输是否需要一个新的时间 提前量; 如果需要一个新的时间提前量, 则通知所述用户终端在所述 分量载波上发送随机接入码至上行传输的目的设备。
根据本发明的另一个实施例,提供了一种在无线通信网络的用户
终端中用于确定其时间提前量的方法, 包括以下步骤: 确定一个分量 载波上的上行传输是否需要发送随机接入码至该上行传输的目的设 备; 如确定需要发送随机接入码至上行传输的目的设备, 则在所述分 量载波上发送随机接入码至上行传输的目的设备。
根据本发明的另一个实施例,提供了一种在无线通信网络的基站 中用于为用户终端确定时间提前量的装置, 包括: 第一确定装置, 用 于确定所述用户终端在一个分量载波上的上行传输是否需要一个新 的时间提前量; 通知装置, 用于如果需要一个新的时间提前量, 则通 知所述用户终端在所述分量载波上发送随机接入码至上行传输的目 的设备。
根据本发明的另一个实施例,提供了一种在无线通信网络的用户 终端中用于确定其时间提前量的装置, 包括: 第二确定装置, 用于确 定一个分量载波上的上行传输是否需要发送随机接入码至该上行传 输的目的设备; 发送装置, 用于如确定需要发送随机接入码至上行传 输的目的设备, 则在所述分量载波上发送随机接入码至上行传输的目 的设备。
通过 用本发明的方法和装置, 为多分量载波无线通信系统提供 了一个有效地在用户终端中维持多个时间提前量的解决方案,在此基 础上, 可以使用诸如多点协作、 频率选择性中继、 非连续载波聚合等 技术, 提高系统性能。 另外, 本发明的技术方案对用户终端的改动不 大, 保持了良好的兼容性。 附图说明
通过阅读以下参照附图对非限制性实施例所作的详细描述, 本发 明的其它特征、 目的和优点将会变得更明显。
图 1为根据本发明的一个具体实施方式的无线通信网络的应用场 景图示意图;
图 2为根据本发明的一个具体实施方式的在无线通信网络的基站 中用于为用户终端确定时间提前量的方法流程图;
图 3为根据本发明的一个具体实施方式的协同多点传输的应用场 景示意图;
图 4 ( a )为根据本发明的一个具体实施方式的无线中继的应用场 景示意图;
图 4 ( b )为根据本发明的一个具体实施方式的多点传输的应用场 景示意图;
图 5为根据本发明的一个具体实施方式的在无线通信网络的用户 终端中用于确定其时间提前量的方法流程图;
图 6为根据本发明的一个具体实施方式的在无线通信网络的基站 中用于为用户终端确定时间提前量的装置 600的结构框图;
图 7为根据本发明的一个具体实施方式的在无线通信网络的用户 终端中用于确定其时间提前量的装置 700的结构框图;
其中, 相同或相似的附图标记表示相同或相似的步骤特征或装置 (模块)。 具体实施方式
以下结合附图对本发明的具体实施例进行详细的示例性描述。 图 1示出了根据本发明的一个具体实施方式的无线通信网络的应 用场景图。 在图 1 中, 基站 11为用户终端 21配置一个或多个分量载 波, 并为用户终端确定不同分量载波上的不同的时间提前量。
图 2示出了根据本发明的一个具体实施方式的在无线通信网络的 基站中用于为用户终端确定时间提前量的方法流程图,以下结合图 1 , 对基站 11 为用户终端 12确定时间提前量的方法流程图进行详细说 明。
首先, 在步骤 S201 中, 基站 11确定用户终端 21在一个分量载 波上的上行传输是否需要一个新的时间提前量。
需要说明的是, 新的时间提前量的含义是针对已有的时间提前量 而言的。 对于目前的无线通信系统, 例如, 对于单分量载波的 LTE 无线通信系统, 系统中已有也仅有一个时间提前量(当然, 该时间提
前量的值可能是随着时间变化而变化的)。 从单分量载波 LTE无线通 信系统过渡到多分量载波的 LTE-Advanced无线通信系统中, 一个时 间提前量满足不了无线通信系统的需要, 因而需要多个时间提前量。
另外, 进一步为了提升无线通信系统的性能, 对于具有单分量载 波的无线通信系统, 在现有的一个时间提前量的基础上, 也可视应用 场景不同再增加一个或多个新的时间提前量, 下文将会对此进行说 明。
在一个实施例中, 由于无线通信系统中下行同步已经实现, 因此 时间提前量仅指用户终端至基站的上行传输延迟。
具体地, 用户终端 21 在一个分量载波上的上行传输是否需要一 个新的时间提前量可分为多种情形。
一种情形如下: 在 LTE-Advanced中, 具有多个分量载波, 用户 终端 21首先被配置了一个分量载波 CC1用于上行传输, 后来由于用 户终端 21的上行数据量增加等因素, 基站 11又为用户终端新分配了 一个载波分量 CC2用于上行传输, 则基站 11确定用户终端 21在新 分配的分量载波 CC2上的上行传输需要一个新的时间提前量。
可选地, 在一个实施例中, 如果 CC2的频率与 CC1的频率的差 值大于第一预定阈值,则基站 11确定用户终端 21在新分配的分量载 波 CC2 上的上行传输需要一个新的时间提前量。 由于分量载波的频 率通常是一个频率范围, 如 700MHz至 720MHz, 因此 CC2的频率与 CC1的频率的差值可用它们的中心频率的差值来定义。第二预定阈值 的取值可根据无线系统的参数和不同频率下信道条件等因素来确定。 例如, 对 LTE-Advanced无线通信网络, 如果频率带宽为 100MHz且 该频率带宽为不连续分布, 则可以划分为 5个分量载波, 每个分量载 波的带宽为 20MHz, 如果两个分量载波 CC1与 CC2的中心频率差值 大于 80MHz, 则基站 11确定用户终端 21在新分配的分量载波 CC2 上的上行传输需要一个新的时间提前量。
另一种情形如图 3所示的协同多点传输的应用场景, 在图 3中, 用户终端 21在分量载波 CC1上同时向基站 11和基站 12发送上行数
据, 基站 11 负责控制用户终端 21的传输。 如果用户终端 21与基站 11的距离与用户终端 21与基站 12的距离的差值超过第二预定阈值, 则基站 11确定用户终端 11在分量载波 CC1上至基站 12的上行传输 需要一个新的时间提前量。 第二预定阈值的取值可根据无线系统的参 数来进行确定。 在一个实施例中, 第二预定闹值的取值为 17公里。
还有一种情形如图 4 ( a )或图 4 ( b ) 所示, 如果用户终端 21起 先在频率 fl上进行上行传输, 后来同时也在 f2上进行上行传输, 如 果 f 1 与 的频率差值超过第一预定阈值, 则基站 21确定用户终端 11在频率 f2上的上行传输需要一个新的时间提前量。 fl与 可以是 位于同一个分量载波内, 也可以是位于不同的分量载波中。
在图 4 ( a ) 中, 用户终端 21通过中继站(Relay station )或者转 发器(repeater ) 31在频率 fl上上进行上行传输至基站 11。 用户终端 21 通过中继站 (Relay station ) 或者转发器 (repeater ) 32在频率 β 上上进行上行传输至基站 11。 fl与 2可以是位于同一个分量载波内, 也可以是位于不同的分量载波中。
在图 4 ( b ) 中, 用户终端 21 在频率 fl 上进行上行传输至基站 11, 在频率 2上进行上行传输至基站 12。 fl与 2可以是位于同一个 分量载波内, 也可以是位于不同的分量载波中。
回到图 2, 接着在步驟 S202中, 如果用户终端 21在一个分量载 波上的上行传输需要一个新的时间提前量, 基站 11 则通知用户终端 21在该分量载波上发送随机接入码至上行传输的目的设备。
用户终端 21根据来自基站 11的通知, 在该分量载波上发送随机 接入码至上行传输的目的设备。
对于图 1或图 4 ( a ) 所示的应用场景, 基站 11为新的时间提前 量对应的上行传输的目的设备。 对于图 3或者图 4 ( b )所示的应用场 景, 基站 12为新的时间提前量对应的上行传输的目的设备。
例如, 在 LTE-Advanced无线通信网络中, 用户终端 21在随机接 入信道(RACH ) 上发送随机接入码至上行传输的目的设备。
接着在步驟 S203中, 基站 11获取新的时间提前量, 并通知用户
终端 11该新的时间提前量。
具体地, 视基站 11 是否为新的时间提前量对应的上行传输的目 的设备的不同, 基站 11获取新的时间提前量的方式也不同。
例如, 如果基站 11 为新的时间提前量对应的上行传输的目的设 备, 则基站 11根据接收到随机接入码的时间点以及用户终端 21发送 随机接入码的时间点来确定新的时间提前量, 并通知用户终端 21 该 新的时间提前量, 如图 1或图 4 ( & ) 所示的应用场景。
通常, 在无线通信系统中, 用户终端 21 发送随机接入码的时间 点是由基站 11来规定的, 因此基站 11能够根据接收到随机接入码的 时间点来确定时间提前量。
如果基站 11 不是新的时间提前量对应的上行传输的目的设备, 则基站 11 接收来自目的设备的新的时间提前量, 并将该新的时间提 前量发送给用户终端 21 , 如图 3或图 4 ( b ) 所示的应用场景, 基站 21根据接收到随机接入码的时间点以及用户终端 21发送随机接入码 的时间点来确定新的时间提前量, 并将该新的时间提前量发送给基站 11, 然后基站 11将该新的时间提前量发送给用户终端 21。
需要说明的是, 步骤 S203 不是本发明的一个必需步骤, 在有些 情形下,新的时间提前量可由目的设备直接发送给用户终端 21 , 无需 经由基站 11转发。
当然, 如果基站 11确定用户终端 21在一个分量载波上的上行传 输不需要一个新的时间提前量, 则通知该用户终端 21 利用已有的时 间提前量进行该分量载波上的上行传输。
图 5示出了根据本发明的一个具体实施方式的在无线通信网络的 用户终端中用于确定其时间提前量的方法流程图。 以下结合图 1或者 图 3、 图 4 ( a ) 或图 4 ( b ) 所示的应用场景, 对用户终端 21执行图 5中所示的流程的过程进行详细说明。
首先, 在步骤 S501中, 用户终端 21确定一个分量载波上的上行 传输是否需要发送随机接入码至该上行传输的目的设备。
一方面, 用户终端 21可才艮据来自基站 11的通知确定需要在所述
分量载波上发送随机接入码至上行传输的目的设备。 如图 1、 图 3或 图 4 ( a ) 和 (b ) 所示的应用场景。
另一方面, 用户终端 21也可无需基站 11的通知, 自行确定在一 个一个分量载波上的上行传输是否需要发送随机接入码至该上行传 输的目的设备。
例如, 如果需执行上行传输的一个分量载波的频率与已有时间提 前量的其它分量载波的频率的差值大于第一预定阈值,则用户终端 21 确定在该分量载波上发送随机接入码至上行传输的目的设备。
接着, 在步骤 S502中, 如用户终端 21确定需要发送随机接入码 至上行传输的目的设备, 则在上述分量载波上发送随机接入码至上行 传输的目的设备。
可选地, 最后, 在步骤 S503中, 用户终端 21根据来自目的设备 的新的时间提前量来执行上述分量载波上的上行传输。 需要说明的 是, 新的时间提前量由目的设备确定, 可由目的设备直接发送给用户 终端 21 , 或者经由基站 11发送给用户终端 21 (此情形下, 基站 11 不是上行传输的目的设备)。
图 6示出了根据本发明的一个具体实施方式的在无线通信网络的 基站中用于为用户终端确定时间提前量的装置 600的结构框图。在图 6中, 装置 600包括第一确定装置 601、 通知装置 602和获取通知装 置 603。 '
以下结合图 1所示的应用场景, 对位于基站 11 中的装置 600为 用户终端 21确定时间提前量的工作过程进行详细说明。
首先, 第一确定装置 601确定用户终端 21在一个分量载波上的 上行传输是否需要一个新的时间提前量。 这里新的时间提前量的含义 如前文所述。 用户终端 21 在一个分量载波上的上行传输需要一个新 的时间提前量的应用场景也有很多, 如上文所述的图 1、 图 3、 图 4 ( a ) 和图 4 ( b ) 所示。
如果第一确定装置 601确定需要一个新的时间提前量, 则通知装 置 602通知用户终端 21在该分量载波上发送随机接入码至上行传输
的目的设备。 对于图 1或图 4 ( a ) 所示的应用场景, 基站 11为新的 时间提前量对应的上行传输的目的设备。 对于图 3或者图 4 ( b )所示 的应用场景, 基站 12为新的时间提前量对应的上行传输的目的设备。
最后, 获取通知装置 603获取上述新的时间提前量, 并通知用户 终端 21该新的时间提前量。
具体地, 视基站 11 是否为新的时间提前量对应的上行传输的目 的设备的不同,获取通知装置 603获取新的时间提前量的方式也不同。
如果基站 11 为新的时间提前量对应的上行传输的目的设备, 则 获取通知装置 603 根据接收到随机接入码的时间点以及用户终端 21 发送随机接入码的时间点来确定新的时间提前量,并通知用户终端 21 该新的时间提前量, 如图 1或图 4 ( & ) 所示的应用场景。
通常, 在无线通信系统中, 用户终端 21 发送随机接入码的时间 点是由基站 11来规定的, 因此获取通知装置 603能够根据接收到随 机接入码的时间点来确定时间提前量。
如果基站 11 不是新的时间提前量对应的上行传输的目的设备, 则获取通知装置 603接收来自目的设备的新的时间提前量, 并将该新 的时间提前量发送给用户终端 21, 如图 3或图 4 ( b ) 所示的应用场 景, 基站 21根据接收到随机接入码的时间点以及用户终端 21发送随 机接入码的时间点来确定新的时间提前量, 并将该新的时间提前量发 送给获取通知装置 603, 然后获取通知装置 603将该新的时间提前量 发送给用户终端 21。
需要说明的是, 获取通知装置 603不是本发明的装置 600的一个 必需装置。 有些情形下, 新的时间提前量可由目的设备直接发送给用 户终端 21。
图 7示出了一种在无线通信网络的用户终端中用于确定其时间提 前量的装置 700的结构框图。 在图 7中, 装置 700包括第二确定装置 701和发送装置 702。
以下结合图 1所示的应用场景,对位于用户终端 21中的装置 700 确定其时间提前量的工作过程进行详细说明。
首先, 第二确定装置 701确定一个分量载波上的上行传输是否需 要发送随机接入码至该上行传输的目的设备。
一方面, 第二确定装置 701可根据来自基站 11 的通知确定需要 在所述分量载波上发送随机接入码至上行传输的目的设备。 如图 1、 图 3或图 4 ( a ) 和 (b ) 所示的应用场景。
另一方面, 第二确定装置 701也可无需基站 11 的通知, 自行确 定在一个一个分量载波上的上行传输是否需要发送随机接入码至该 上行传输的目的设备。
例如, 如果需执行上行传输的一个分量载波的频率与已有时间提 前量的其它分量载波的频率的差值大于第一预定阈值, 则第二确定装 置 701确定在该分量载波上发送随机接入码至上行传输的目的设备。
如第二确定装置 701确定需要发送随机接入码至上行传输的目的 设备, 则发送装置 702在该分量载波上发送随机接入码至上行传输的 目的设备。
可选地, 最后, 用户终端 21根据来自目的设备的新的时间提前 量来执行上述分量载波上的上行传输。 需要说明的是, 新的时间提前 量由目的设备确定, 可由目的设备直接发送给用户终端 21, 或者经由 基站 11发送给用户终端 21 (此情形下, 基站 11不是上行传输的目的 设备)。
需要说明的是, 上述实施例仅是示范性的, 而非对本发明的限制。 任何不背离本发明精神的技术方案均应落入本发明的保护范围之内。 此 夕卜, 不应将权利要求中的任何附图标记视为限制所涉及的权利要求; "包 括,,一词不排除其它权利要求或说明书中未列出的装置或步骤;装置前的 "一个" 不排除多个这样的装置的存在; 在包含多个装置的设备中, 该 多个装置中的一个或多个的功能可由同一个硬件或软件模块来实现; "第 一"、 "第二"、 "第三" 等词语仅用来表示名称, 而并不表示任何特定的 顺序。
Claims
1. 一种在无线通信网络的基站中用于为用户终端确定时间提前 量的方法, 该方法包括以下步骤:
A. 确定所述用户终端在一个分量载波上的上行传输是否需要一 个新的时间提前量;
B. 如果需要一个新的时间提前量, 则通知所述用户终端在所述 分量载波上发送随机接入码至上行传输的目的设备。
2. 根据权利要求 1所述的方法, 其中, 还包括以下步骤:
C. 获取所述新的时间提前量, 并通知所述用户终端该新的时间 提前量。
3. 根据权利要求 1 所述的方法, 其中, 所述目的设备为所述基 站, 所述方法还包括以下步骤:
C. 根据接收到所述随机接入码的时间点以及所述用户终端发送 所述随机接入码的时间点来确定所述新的时间提前量, 并通知所述用 户终端该新的时间提前量。
4. 根据权利要求 1所述的方法, 其中, 还包括以下步骤:
- 接收来自所述目的设备的所述新的时间提前量, 并通知所述用 户终端该新的时间提前量。
5. 根据权利要求 1所述的方法, 其中所述步骤 A包括以下步骤: - 如所述分量载波的频率与已有时间提前量的其它分量载波的 频率的差值大于第一预定阈值, 则确定所述用户终端在该分量载波上 的上行传输需要一个新的时间提前量。
6. 根据权利要求 1所述的方法,其中所述目的设备包括除所述基 站外的其它目的设备, 所述步骤 A包括以下步骤:
- 如所述用户终端至所述基站之间的距离与所述用户终端至所 述其它目的设备的距离的差值大于第二预定阈值, 则确定所述用户终 端至所述其它目的设备的在在该分量载波上的上行传输还需一个新 的时间提前量。
7. 根据权利要求 1 所述的方法, 其中, 所述方法还包括以下步 骤:
- 如果不需要一个新的时间提前量, 通知所述用户终端利用已有 的时间提前量进行所述分量载波上的上行传输。
8. 根据权利要求 1所述的方法,其中, 所述时间提前量包括所述 用户终端至所述基站的上行传输时延。
9. 一种在无线通信网络的用户终端中用于确定其时间提前量的 方法, 其中, 包括以下步骤:
I. 确定一个分量载波上的上行传输是否需要发送随机接入码至 该上行传输的目的设备;
II. 如确定需要发送随机接入码至上行传输的目的设备, 则在所 述分量载波上发送随机接入码至上行传输的目的设备。
10. 根据权利要求 9所述的方法, 其中, 所述步骤 I包括以下步 骤:
- 根据来自基站的通知确定需要在所述分量载波上发送随机接 入码至上行传输的目的设备。
11. 根据权利要求 9所述的方法, 其中, 所述步骤 I包括以下步 骤:
- 如所述分量载波的频率与已有时间提前量的其它分量载波的 频率的差值大于第一预定阈值, 则确定在所述分量载波上发送随机接 入码至上行传输的目的设备。
12. 根据权利要求 9所述的方法, 其中, 还包括以下步骤:
- 根据来自所述目的设备的新的时间提前量来执行所述分量载 波上的上行传输。
13. 一种在无线通信网络的基站中用于为用户终端确定时间提前 量的装置, 包括:
第一确定装置, 用于确定所述用户终端在一个分量载波上的上行 传输是否需要一个新的时间提前量;
通知装置, 用于如果需要一个新的时间提前量, 则通知所述用户 终端在所述分量载波上发送随机接入码至上行传输的目的设备。
14. 根据权利要求 13所述的装置, 其中, 还包括:
获取通知装置用于获取所述新的时间提前量, 并通知所述用户终 端该新的时间提前量。
15. 一种在无线通信网络的用户终端中用于确定其时间提前量的 装置, 包括:
第二确定装置, 用于确定一个分量载波上的上行传输是否需要发 送随机接入码至该上行传输的目的设备;
发送装置, 用于如确定需要发送随机接入码至上行传输的目的设 备, 则在所述分量载波上发送随机接入码至上行传输的目的设备。
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| CN108271274A (zh) * | 2017-01-04 | 2018-07-10 | 中兴通讯股份有限公司 | 一种信息同步方法和装置 |
| CN109788543A (zh) * | 2017-11-13 | 2019-05-21 | 展讯通信(上海)有限公司 | 上行ta的确定方法及装置、存储介质、终端 |
| CN113261218A (zh) * | 2021-01-13 | 2021-08-13 | 北京小米移动软件有限公司 | 定时调整方法及装置、存储介质 |
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- 2010-01-07 WO PCT/CN2010/070051 patent/WO2011082525A1/zh not_active Ceased
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| CN101154984A (zh) * | 2006-09-25 | 2008-04-02 | 大唐移动通信设备有限公司 | 一种保持上行同步的方法及系统 |
| US20080084849A1 (en) * | 2006-10-06 | 2008-04-10 | Interdigital Technology Corporation | Autonomous timing advance adjustment during handover |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013023354A1 (en) * | 2011-08-15 | 2013-02-21 | Renesas Mobile Corporation | User equipment assisted configuration of timing advance groups |
| WO2013159701A1 (zh) * | 2012-04-24 | 2013-10-31 | 华为技术有限公司 | 传输信号的方法、用户设备和网络侧设备 |
| CN108271274A (zh) * | 2017-01-04 | 2018-07-10 | 中兴通讯股份有限公司 | 一种信息同步方法和装置 |
| WO2018126756A1 (zh) * | 2017-01-04 | 2018-07-12 | 中兴通讯股份有限公司 | 一种信息同步方法和装置 |
| CN109788543A (zh) * | 2017-11-13 | 2019-05-21 | 展讯通信(上海)有限公司 | 上行ta的确定方法及装置、存储介质、终端 |
| CN109788543B (zh) * | 2017-11-13 | 2020-10-09 | 展讯通信(上海)有限公司 | 上行ta的确定方法及装置、存储介质、终端 |
| CN113261218A (zh) * | 2021-01-13 | 2021-08-13 | 北京小米移动软件有限公司 | 定时调整方法及装置、存储介质 |
| CN113261218B (zh) * | 2021-01-13 | 2023-07-25 | 北京小米移动软件有限公司 | 定时调整方法及装置、存储介质 |
| US12580643B2 (en) | 2021-01-13 | 2026-03-17 | Beijing Xiaomi Mobile Software Co., Ltd. | Timing adjustment method and device, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102668654A (zh) | 2012-09-12 |
| CN102668654B (zh) | 2014-07-02 |
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